The industrial civilization has played an irreplaceable role in the evolution of human civilization,but it is dispelled by the serious ecological problems it has brought about.Thus,the prosperous industrial civilizati...The industrial civilization has played an irreplaceable role in the evolution of human civilization,but it is dispelled by the serious ecological problems it has brought about.Thus,the prosperous industrial civilization cannot develop sustainably because of the loss of the solid natural ecological foundation.From the perspective of ecological economics,its whole process shows obvious non-ecological appearances,which are the sharpness of the basic contradiction of the ecological economic system,the predatoriness of the ecological economic structure and the inevitability of the ecological crisis.These non-ecological appearances reflect the objective factual state of separation and opposition between the economic system and the ecological system in the process of the industrial civilization development.Only by transforming the industrial civilization into the ecological civilization can human civilization evolve sustainably.展开更多
Graft copolymers of MMA （methyl methacrylate） with NRL （natural rubber latex） referred to as NR-g-PMMA have been prepared using CHP （cumene hydroperoxide）/TEPA （tetraetbylenepentamine） redox initiator. 1H NMR ...Graft copolymers of MMA （methyl methacrylate） with NRL （natural rubber latex） referred to as NR-g-PMMA have been prepared using CHP （cumene hydroperoxide）/TEPA （tetraetbylenepentamine） redox initiator. 1H NMR （proton nuclear magnetic resonance） and FTIR （Fourier transform infrared） analysis have confirmed the occurrence of graft copolymerisations of MMA onto NR that containing 30% and 50% of MMA monomer. The influence of coagulating agents such as formic acid, sulfuric acid and boiling water on the coagulation of NR-g-PMMA latices were investigated. These types of coagulating agent formed compact coagulum and the effect of NR-g-PMMA compounds on cure characteristics, physical properties and appearances were reported.展开更多
If a Chinese teenager were to describe my appearance,he or she would note:tan skin,straight black hair,almond-shaped eyes(杏眼),and an average height and weight.Upon being asked to list my interests,I would say:playin...If a Chinese teenager were to describe my appearance,he or she would note:tan skin,straight black hair,almond-shaped eyes(杏眼),and an average height and weight.Upon being asked to list my interests,I would say:playing musical instruments,reading,writing,painting,dancing and going out with friends.I enjoy all kinds of food and music,and I do well in school while making time for family and friends.In many ways,I’m just like any typical Chinese teenager-except I live in the United States.展开更多
It is the morning of my 58th birthday as I write this.That actually means I have lived 58 full years here on Earth and am starting the first day of my 59th.That is a lot of kilometers under the hood.When I looked in m...It is the morning of my 58th birthday as I write this.That actually means I have lived 58 full years here on Earth and am starting the first day of my 59th.That is a lot of kilometers under the hood.When I looked in my mirror this morning,I could see the wear and tear on my body.My hair was sparse and silver.My skin was thin.My face was full of age spots.And my wrinkles were chiseled(刻)deep into my skin.Yet,when I smiled and I saw them curl up around my eyes and the corners of my mouth,I had to admit that they didnt look half bad.展开更多
I love dogs because they are so friendly and lovely.With bright eyes,dogs can see things in the dark.Their noses are very sensitive,and this helps them find things easily.My pet dog is named Dahu.He is white with long...I love dogs because they are so friendly and lovely.With bright eyes,dogs can see things in the dark.Their noses are very sensitive,and this helps them find things easily.My pet dog is named Dahu.He is white with long ears.Every day when I come back home from school,he runs to me happily and wags his tail.We often play games together.He likes to chase a ball,and I throw the ball far,then he runs quickly to bring it back.展开更多
[Objectives]This study adopted a three-factor three-level orthogonal design to explore the effects of different application periods and methods of fish protein peptide on the fruit quality of‘Tieshanzha’.[Methods]Fa...[Objectives]This study adopted a three-factor three-level orthogonal design to explore the effects of different application periods and methods of fish protein peptide on the fruit quality of‘Tieshanzha’.[Methods]Factor A was set as the application period,with three levels:fruit-setting stage,core-hardening stage,and pre-coloring stage.Factor B was set as the application method,with three levels:root application,foliar spray,and root application+foliar spray.Factor C was set as the application concentration,with three levels:0,5 and 10 ml/L.[Results]Application period had an extremely significant effect on single fruit weight.Fertilization at the fruit-setting stage showed a single fruit weight as high as 13.36 g,which was 27.9%and 24%higher than those achieved by fertilization at the core-hardening stage and the pre-coloring stage,respectively.The factor that had the greatest impact on the internal quality of hawthorn fruit,specifically the Vc content,was application method.The optimal combination was foliar spray at the core-hardening stage with a concentration of 10 ml/L,which achieved the best fertilization effect.[Conclusions]This study provides a theoretical basis for improving fruit quality of‘Tieshanzha’.展开更多
At our school,we have to wear uniforms every day.The problem is that all my classmates think the uniforms are ugly.We think young people should look smart,because①we would like to wear our own clothes.Our teachers th...At our school,we have to wear uniforms every day.The problem is that all my classmates think the uniforms are ugly.We think young people should look smart,because①we would like to wear our own clothes.Our teachers think that if we do that,we will concentrate much②on our clothes than our studies.We don't agree.展开更多
Rice grain size is a primary characteristic essential for artificial domestication and breeding,governed by grain length,width,and thickness.In this study,we cloned Grain Size 10(GS10),a novel gene via mapbased clonin...Rice grain size is a primary characteristic essential for artificial domestication and breeding,governed by grain length,width,and thickness.In this study,we cloned Grain Size 10(GS10),a novel gene via mapbased cloning.Biochemical,molecular,and genetic studies were performed to elucidate the GS10 involved grain size mechanism in rice.Mutant of GS10 lead to reduced grain size due to alterations in cell expansion.Additionally,GS10 is responsible for the formation of notched-belly grains,especially in smaller grain varieties possessing loss-function mutations.Overexpression of GS10 in Nipponbare results in increasing grain length,grain weight and improve the appearance quality of rice.GS10 encodes conserved protein with uncharacterized function.Furthermore,GS10 regulates the grain size by interacting OsBRICK1,a subunit of the WAVE complex that governs actin nucleation and affects the assembly of microfilaments in rice.Together,our study demonstrates that,GS10 positively regulates the grain length and grain weight,which is beneficial for further improvements in yield characteristics.展开更多
This study aimed to optimize the application rates and base-topdressing ratios of nitrogen and potassium for flue-cured tobacco in Chaling,Zhuzhou,Hunan.The tobacco variety‘Yunyan 87’was planted and subjected to eig...This study aimed to optimize the application rates and base-topdressing ratios of nitrogen and potassium for flue-cured tobacco in Chaling,Zhuzhou,Hunan.The tobacco variety‘Yunyan 87’was planted and subjected to eight different treatments with different application rates and base-topdressing ratios of nitrogen and potassium.The effect of different treatments on the agronomic traits,dry matter accumulation,yield,and quality of tobacco were compared.The results showed that the growth period of each treatment became shortened as the application rates of nitrogen and potassium decreased and as the base-topdressing ratios of nitrogen and potassium increased.The dry matter accumulation decreased with the reduction in the application rates of nitrogen and potassium.The yield and output value of T1 were the highest,reaching 2097.39 kg/hm^(2)and 65018.90 yuan/hm^(2),respectively,both significantly increasing by 57.5%compared with those of the control(CK).In addition,the proportions of leaves of high and mid-high grade in T1 were also the highest,reaching 73.31%and 88.79%,respectively,both higher than those of CK.The appearance evaluation results showed that the appearance quality scores of tobacco leaves of grades B2F and C3F in T1 were the highest,reaching 51 points,both of which were 3 points higher than that those of CK.All the treatments were consistent in terms of color,maturity,leaf structure,body,oil,and color intensity.Therefore,it was suggested that the tobacco production in Chaling should appropriately increase the proportions of nitrogen and potassium as base fertilizers on the basis of conventional fertilization,which was conducive to improving the yield and appearance quality of flue-cured tobacco.展开更多
Target tracking is an essential task in contemporary computer vision applications.However,its effectiveness is susceptible to model drift,due to the different appearances of targets,which often compromises tracking ro...Target tracking is an essential task in contemporary computer vision applications.However,its effectiveness is susceptible to model drift,due to the different appearances of targets,which often compromises tracking robustness and precision.In this paper,a universally applicable method based on correlation filters is introduced to mitigate model drift in complex scenarios.It employs temporal-confidence samples as a priori to guide the model update process and ensure its precision and consistency over a long period.An improved update mechanism based on the peak side-lobe to peak correlation energy(PSPCE)criterion is proposed,which selects high-confidence samples along the temporal dimension to update temporal-confidence samples.Extensive experiments on various benchmarks demonstrate that the proposed method achieves a competitive performance compared with the state-of-the-art methods.Especially when the target appearance changes significantly,our method is more robust and can achieve a balance between precision and speed.Specifically,on the object tracking benchmark(OTB-100)dataset,compared to the baseline,the tracking precision of our model improves by 8.8%,8.8%,5.1%,5.6%,and 6.9%for background clutter,deformation,occlusion,rotation,and illumination variation,respectively.The results indicate that this proposed method can significantly enhance the robustness and precision of target tracking in dynamic and challenging environments,offering a reliable solution for applications such as real-time monitoring,autonomous driving,and precision guidance.展开更多
The nature of pramāṅa system,outlined by Dignāga(c.480-540 CE)and further elaborated upon by Dharmakīrti(c.600-660 CE),is an important part of the Buddhist logico-epistemological tradition.Within this pramāṅa syst...The nature of pramāṅa system,outlined by Dignāga(c.480-540 CE)and further elaborated upon by Dharmakīrti(c.600-660 CE),is an important part of the Buddhist logico-epistemological tradition.Within this pramāṅa system,self-awareness(svasaṃvedana)is considered a hallmark of the access to the mental states and factors.However,some of the key research often focuses on interpreting the valid cognition system and self-awareness separately,lacking specific descriptions of their interrelationship.This paper argues that self-awareness is not merely a byproduct of valid cognition but is intimately connected to it.Specifically,I posit that self-awareness should be regarded as the ultimate result of valid cognition within the Pramāṇa system.展开更多
Rice grain size and chalkiness are important traits that influence grain yield and quality,respectively.Mining of genes for grain yield and appearance quality and clarification of their action modes are of great impor...Rice grain size and chalkiness are important traits that influence grain yield and quality,respectively.Mining of genes for grain yield and appearance quality and clarification of their action modes are of great importance in rice breeding.In this study,a rice protein disulfide isomerase-like enzyme PDIL2-3 was characterized.Expression analysis revealed that PDIL2-3 was highly expressed in endosperm and spikelet hulls.The PDIL2-3-cri lines generated by CRISPR/Cas9 technology exhibited a chalky grain phenotype with altered storage substance accumulation and increased grain size and weight,whereas exactly opposite results were obtained for PDIL2-3 overexpression lines.Cytological experiments revealed that PDIL2-3-cri increased rice seed length mainly by increasing the cell number and rice seed width mainly by increasing the cell size in grains,implying that PDIL2-3 regulates the grain size by influencing both cell division and expansion of spikelet hulls.Further flow cytometric analysis validated that PDIL2-3 has a negative effect on cell proliferation,preventing DNA duplication and cell division in spikelet hulls.Moreover,q RT-PCR results showed that the expression levels of genes related to cell cycle and storage substance synthesis were significantly changed in PDIL2-3-cri transgenic lines.Thus,our results indicated that PDIL2-3 plays a pivotal role in influencing grain size and quality of rice by affecting cell division/expansion and storage substance accumulation,providing new insights into the function of PDIL family members in rice and enriching the genetic resources for rice breeding.展开更多
Lumbar degeneration leads to changes in geometry and density distribution of vertebrae,which could further influence the mechanical property and behavior.This study aimed to quantitatively describe the variations in s...Lumbar degeneration leads to changes in geometry and density distribution of vertebrae,which could further influence the mechanical property and behavior.This study aimed to quantitatively describe the variations in shape and density distribution for degenerated vertebrae by statistical models,and utilized the specific statistical shape model(SSM)/statistical appearance model(SAM)modes to assess compressive strength and fracture behavior.Highly detailed SSM and SAM were developed based on the 75 L1 vertebrae of elderly men,and their variations in shape and density distribution were quantified with principal component(PC)modes.All vertebrae were classified into mild(n=22),moderate(n=29),and severe(n=24)groups according to the overall degree of degeneration.Quantitative computed tomography-based finite element analysis was used to calculate compressive strength for each L1 vertebra,and the associations between compressive strength and PC modes were evaluated by multivariable linear regression(MLR).Moreover,the distributions of equivalent plastic strain(PEEQ)for the vertebrae assigned with the first modes of SSM and SAM at mean±3SD were investigated.The Leave-One-Out analysis showed that our SSM and SAM had good performance,with mean absolute errors of 0.335±0.084 mm and 64.610±26.620 mg/cm3,respectively.A reasonable accuracy of bone strength prediction was achieved by using four PC modes(SSM 1,SAM 1,SAM 4,and SAM 5)to construct the MLR model.Furthermore,the PEEQ values were more sensitive to degeneration-related variations of density distribution than those of morphology.The density variations may change the deformity type(compression deformity or wedge deformity),which further affects the fracture pattern.Statistical models can identify the morphology and density variations in degenerative vertebrae,and the SSM/SAM modes could be used to assess compressive strength and fracture behavior.The above findings have implications for assisting clinicians in pathological diagnosis,fracture risk assessment,implant design,and preoperative planning.展开更多
Background:Restrained eating,often motivated by the desire to control weight,is prevalent among young female college students and is considered a risk factor for eating disorders.Negative evaluation fear,exacerbated b...Background:Restrained eating,often motivated by the desire to control weight,is prevalent among young female college students and is considered a risk factor for eating disorders.Negative evaluation fear,exacerbated by social pressure,peer comparison,and academic stress,has been identified as a potential contributor to restrained eating behavior.However,research exploring the relationship between negative evaluation fear and restrained eating,particularly in the context of self-esteem and physical appearance perfectionism,remains limited.This study aims to investigate these relationships and design an intervention program to reduce restrained eating behaviors in female college students.Methods:Study 1 involved 617 female college students,using the Physical Appearance Perfectionism Scale,Rosenberg Self-Esteem Scale,Fear of Negative Evaluation Scale,and Dutch Eating Behavior Questionnaire to measure key variables.We examined the relationships between physical appearance perfectionism,self-esteem,fear of negative evaluation,and restrained eating.In Study 2,a 4-week group psychological intervention based on Acceptance and Commitment Therapy(ACT)was implemented with 45 students,divided into experimental,control,and placebo groups.The intervention’s effectiveness was assessed in reducing restrained eating and negative evaluation fear.Results:The study found that fear of negative evaluation significantly predicted restrained eating and physical appearance perfectionism.Physical appearance perfectionism,in turn,positively predicted restrained eating and partially mediated the relationship between negative evaluation fear and restrained eating.Self-esteem moderated this mediation effect.Additionally,the ACT-based intervention significantly reduced fear of negative evaluation and restrained eating behavior in the experimental group.Conclusion:This study identifies fear of negative evaluation and physical appearance perfectionism as key predictors of restrained eating in female college students.Fear of negative evaluation significantly predicted restrained eating,with physical appearance perfectionism partially mediating this relationship.The ACT-based intervention effectively reduced both fear of negative evaluation and restrained eating.These findings highlight the importance of addressing negative evaluation fear and appearance perfectionism in interventions for restrained eating.展开更多
Background:University students face significant challenges inmaintaining healthy physical activity(PA)and dietary habits,and they often fall short of global health recommendations.Psychological factors such as social ...Background:University students face significant challenges inmaintaining healthy physical activity(PA)and dietary habits,and they often fall short of global health recommendations.Psychological factors such as social physique anxiety,body image concerns,and self-objectification may act as barriers to PA engagement,influencing both mental and physical health.The present study constructed a structural equation model(SEM)to examine the relationship between body image-related psychological factors and resistance to PA in university students from southern Spain.Methods:A cross-sectional and correlational study was conducted with 519 university students(74%females,26%males;Mean age=21.14±3.26 years)from universities in Granada and Malaga(Spain).Data were collected between May and October 2024 via online questionnaires that assessed PA engagement,Mediterranean diet adherence,eating disorder symptoms,body image-related psychological factors(social physique anxiety,appearance control beliefs,body surveillance,body shame,and self-esteem),and sociodemographic characteristics.SEM was performed to analyze relationships and sex-based differences.Results:Social physique anxietywas positively associated with body shame,body surveillance,and eating disorders,and negatively associated with self-esteem,PA engagement,and appearance control beliefs(all p<0.001).Appearance control beliefs were positively related to self-esteem,body surveillance,and PA(all p<0.05).Body surveillance was negatively linked to PA and positively linked to body shame.Mediterranean diet adherence and eating disorders were positively associated with PA(all p<0.001).Sex-based differences were observed in the model.Conclusion:Body image-related psychological factors may act as barriers to PA among university students.Interventions should integrate mental health promotion and consider sex differences.展开更多
The negative ion based neutral beam injector(NNBI)with a beam energy of 400 keV is one of the subsystems at the Comprehensive Research fAcility for Fusion Technology(CRAFT)in China.The distributed capacitance of the h...The negative ion based neutral beam injector(NNBI)with a beam energy of 400 keV is one of the subsystems at the Comprehensive Research fAcility for Fusion Technology(CRAFT)in China.The distributed capacitance of the high-voltage components is an important basis for the design of surge suppression devices at CRAFT NNBI.This study conducted calculations of distributed capacitance for the key components,including the high-voltage deck,transmission line and isolation transformer in the power supply system using the finite element method.The relationship between the high-voltage deck(HVD)distributed capacitance and the distance from the wall is discussed.The differences in distributed capacitance and energy storage between noncoaxial and coaxial transmission lines are also debated.Finally,the capacitance between the primary and secondary windings of the-400 kV isolation transformer,as well as between the secondary winding and the oil tank casing,was calculated.展开更多
This work presents a grounding protection system of the central solenoid model coil(CSMC)of the Comprehensive Research Facility for Fusion Technology(CRAFT).The scheme of neutral point voltage detections has been adop...This work presents a grounding protection system of the central solenoid model coil(CSMC)of the Comprehensive Research Facility for Fusion Technology(CRAFT).The scheme of neutral point voltage detections has been adopted in grounding protection system.Compared with the usual current acquisition,the measurement data is accurate,there is no redundant loop,and the economic benefit is high.In this study,the single-end and double-end grounding fault protections of superconducting magnet coil are analyzed,and the fault voltage and current under different fault conditions are calculated.The simulation model of CSMC magnet grounding fault is established,and the simulation results of the model are basically consistent with the theoretical calculation.Finally,a small capacity experiment platform is used to verify the function of the grounding protection system.The experimental results show that by comparing the neutral fault sampling voltage with the theoretical grounding protection threshold,the grounding protection system can effectively detect different types of grounding faults and transmit signals to the control system to protect the coils of superconducting magnets.展开更多
When discharge faults occur in dry air switchgear,the air decomposes to produce diverse gases,with NO_(2) reaching the highest levels.Detecting the NO_(2) level can reflect the operation status of the equipment.This p...When discharge faults occur in dry air switchgear,the air decomposes to produce diverse gases,with NO_(2) reaching the highest levels.Detecting the NO_(2) level can reflect the operation status of the equipment.This paper proposes to combine ZnO cluster with MoS_(2) to improve the gassensitive properties of the monolayer.Based on the Density Functional Theory(DFT),the effect of(ZnO)n size on the behavior of MoS_(2 )is considered.Key parameters such as adsorption energy and band gap of(ZnO)n-MoS_(2)/NO_(2) system were calculated.The ZnO-MoS_(2) heterojunction was successfully synthesized by a hydrothermal method.The gas sensor exhibits a remarkable response and a fast response-recovery time to 100 ppm NO_(2).In addition,it demonstrates excellent selectivity,long-term stability and a low detection limit.This work confirms the potential of the ZnO-MoS_(2) composite structure as a highly effective gas sensor for NO_(2) detection,which provides valuable theoretical and experimental insights for fault detection in dry air switchgear.展开更多
In this study,we explored a one-step direct synthesis of NH3 under mild experimental conditions utilizing pulse-modulated microwave plasma technology at atmospheric pressure.At a substantial gas flow rate,a microwave ...In this study,we explored a one-step direct synthesis of NH3 under mild experimental conditions utilizing pulse-modulated microwave plasma technology at atmospheric pressure.At a substantial gas flow rate,a microwave plasma jet was formed and the microwave-assisted ammonia synthesis can be realized.Impacts of various parameters including the gas flow rate,gas component,microwave absorbed power,pulse modulation frequency,and pulse duty cycle on ammonia synthesis were systematically investigated.To indicate the reaction path of ammonia synthesis,the distributions of both the gas temperature and active species were also studied using optical emission spectra technology.It is found that a considerable amount of ammonia was directly synthesized without involvement of any catalysts,the highest ammonia production rate and energy efficiency(EE),up to 2.93μmol·min^(-1) and 6.64×10^(-2)g·(k W·h)^(-1),respectively,were achieved under low microwave power of 84.42 W.The duty cycle has obvious influences on the synthesis efficiency,compared to a duty cycle of 80%,the ammonia synthesis rate,EE and nitrogen conversion decreased by about 22%at a duty cycle of 100%.This finding underscores the significance of incorporating pulse modulation in the microwave discharge process for ammonia synthesis.Furthermore,it was found that vibrational excitation of microwave plasma has a significant driving effect on ammonia synthesis.展开更多
In laser wakefield acceleration,injecting an external electron beam at a certain energy is a promising approach for achieving a high-quality electron beam with low energy spread and low emittance.In this paper,the pro...In laser wakefield acceleration,injecting an external electron beam at a certain energy is a promising approach for achieving a high-quality electron beam with low energy spread and low emittance.In this paper,the process of laser wakefield acceleration with an external injection at 10 pC has been studied in simulations.A Bayesian optimization method is used to optimize the key laser and plasma parameters so that the electron beam is accelerated to the expected energy with a small emittance and energy spread growth.The effect of the rising edge of the plasma on the transverse properties of the electron beam is simulated and optimized in order to ensure that the external electron beam is injected into the plasma without significant emittance growth.Finally,a high-quality electron beam with an energy of 1.5 GeV,a normalized transverse emittance of 0.5 mm·mrad and a relative energy spread of 0.5%at 10 pC is obtained.展开更多
基金Supported by Shanxi Soft Science Research Plan Program in 2016(2016041016-5)Key Research Projects of Shanxi Federation of Social Sciences in 2017-2018(SSKLZDKT2017071)+1 种基金Shanxi Philosophy and Social Science Planning Project in 2018(2018B166)Humanities and Social Sciences Research Fund of North University of China in 2018(2018RW012).
文摘The industrial civilization has played an irreplaceable role in the evolution of human civilization,but it is dispelled by the serious ecological problems it has brought about.Thus,the prosperous industrial civilization cannot develop sustainably because of the loss of the solid natural ecological foundation.From the perspective of ecological economics,its whole process shows obvious non-ecological appearances,which are the sharpness of the basic contradiction of the ecological economic system,the predatoriness of the ecological economic structure and the inevitability of the ecological crisis.These non-ecological appearances reflect the objective factual state of separation and opposition between the economic system and the ecological system in the process of the industrial civilization development.Only by transforming the industrial civilization into the ecological civilization can human civilization evolve sustainably.
文摘Graft copolymers of MMA （methyl methacrylate） with NRL （natural rubber latex） referred to as NR-g-PMMA have been prepared using CHP （cumene hydroperoxide）/TEPA （tetraetbylenepentamine） redox initiator. 1H NMR （proton nuclear magnetic resonance） and FTIR （Fourier transform infrared） analysis have confirmed the occurrence of graft copolymerisations of MMA onto NR that containing 30% and 50% of MMA monomer. The influence of coagulating agents such as formic acid, sulfuric acid and boiling water on the coagulation of NR-g-PMMA latices were investigated. These types of coagulating agent formed compact coagulum and the effect of NR-g-PMMA compounds on cure characteristics, physical properties and appearances were reported.
文摘If a Chinese teenager were to describe my appearance,he or she would note:tan skin,straight black hair,almond-shaped eyes(杏眼),and an average height and weight.Upon being asked to list my interests,I would say:playing musical instruments,reading,writing,painting,dancing and going out with friends.I enjoy all kinds of food and music,and I do well in school while making time for family and friends.In many ways,I’m just like any typical Chinese teenager-except I live in the United States.
文摘It is the morning of my 58th birthday as I write this.That actually means I have lived 58 full years here on Earth and am starting the first day of my 59th.That is a lot of kilometers under the hood.When I looked in my mirror this morning,I could see the wear and tear on my body.My hair was sparse and silver.My skin was thin.My face was full of age spots.And my wrinkles were chiseled(刻)deep into my skin.Yet,when I smiled and I saw them curl up around my eyes and the corners of my mouth,I had to admit that they didnt look half bad.
文摘I love dogs because they are so friendly and lovely.With bright eyes,dogs can see things in the dark.Their noses are very sensitive,and this helps them find things easily.My pet dog is named Dahu.He is white with long ears.Every day when I come back home from school,he runs to me happily and wags his tail.We often play games together.He likes to chase a ball,and I throw the ball far,then he runs quickly to bring it back.
基金Supported by Key Research and Development Program of Hebei Province(23317102D).
文摘[Objectives]This study adopted a three-factor three-level orthogonal design to explore the effects of different application periods and methods of fish protein peptide on the fruit quality of‘Tieshanzha’.[Methods]Factor A was set as the application period,with three levels:fruit-setting stage,core-hardening stage,and pre-coloring stage.Factor B was set as the application method,with three levels:root application,foliar spray,and root application+foliar spray.Factor C was set as the application concentration,with three levels:0,5 and 10 ml/L.[Results]Application period had an extremely significant effect on single fruit weight.Fertilization at the fruit-setting stage showed a single fruit weight as high as 13.36 g,which was 27.9%and 24%higher than those achieved by fertilization at the core-hardening stage and the pre-coloring stage,respectively.The factor that had the greatest impact on the internal quality of hawthorn fruit,specifically the Vc content,was application method.The optimal combination was foliar spray at the core-hardening stage with a concentration of 10 ml/L,which achieved the best fertilization effect.[Conclusions]This study provides a theoretical basis for improving fruit quality of‘Tieshanzha’.
文摘At our school,we have to wear uniforms every day.The problem is that all my classmates think the uniforms are ugly.We think young people should look smart,because①we would like to wear our own clothes.Our teachers think that if we do that,we will concentrate much②on our clothes than our studies.We don't agree.
基金supported by Projects of International Cooperation NSFC(31961143016,31101203)Guizhou Provincial Science and Technology Projects(QKHJC-ZK[2022]YB537)+4 种基金the Fundamental Research Funds of Central Public Welfare Research Institutions(CPSIBRF-CNRRI-202102,Y2020YJ17)Independent Project of State Key Laboratory of Rice Biology(2020Z2KT10201)High-quality and Resistant Hybrid Rice Germplasm Creation and New Varieties Development with International Competitiveness(2022KJCX45,YBXM2437)Zhejiang Provincial Science and Technology Projects(2022R51009)Inner Mongolia Breeding Joint Research Project(YZ2023004).
文摘Rice grain size is a primary characteristic essential for artificial domestication and breeding,governed by grain length,width,and thickness.In this study,we cloned Grain Size 10(GS10),a novel gene via mapbased cloning.Biochemical,molecular,and genetic studies were performed to elucidate the GS10 involved grain size mechanism in rice.Mutant of GS10 lead to reduced grain size due to alterations in cell expansion.Additionally,GS10 is responsible for the formation of notched-belly grains,especially in smaller grain varieties possessing loss-function mutations.Overexpression of GS10 in Nipponbare results in increasing grain length,grain weight and improve the appearance quality of rice.GS10 encodes conserved protein with uncharacterized function.Furthermore,GS10 regulates the grain size by interacting OsBRICK1,a subunit of the WAVE complex that governs actin nucleation and affects the assembly of microfilaments in rice.Together,our study demonstrates that,GS10 positively regulates the grain length and grain weight,which is beneficial for further improvements in yield characteristics.
文摘This study aimed to optimize the application rates and base-topdressing ratios of nitrogen and potassium for flue-cured tobacco in Chaling,Zhuzhou,Hunan.The tobacco variety‘Yunyan 87’was planted and subjected to eight different treatments with different application rates and base-topdressing ratios of nitrogen and potassium.The effect of different treatments on the agronomic traits,dry matter accumulation,yield,and quality of tobacco were compared.The results showed that the growth period of each treatment became shortened as the application rates of nitrogen and potassium decreased and as the base-topdressing ratios of nitrogen and potassium increased.The dry matter accumulation decreased with the reduction in the application rates of nitrogen and potassium.The yield and output value of T1 were the highest,reaching 2097.39 kg/hm^(2)and 65018.90 yuan/hm^(2),respectively,both significantly increasing by 57.5%compared with those of the control(CK).In addition,the proportions of leaves of high and mid-high grade in T1 were also the highest,reaching 73.31%and 88.79%,respectively,both higher than those of CK.The appearance evaluation results showed that the appearance quality scores of tobacco leaves of grades B2F and C3F in T1 were the highest,reaching 51 points,both of which were 3 points higher than that those of CK.All the treatments were consistent in terms of color,maturity,leaf structure,body,oil,and color intensity.Therefore,it was suggested that the tobacco production in Chaling should appropriately increase the proportions of nitrogen and potassium as base fertilizers on the basis of conventional fertilization,which was conducive to improving the yield and appearance quality of flue-cured tobacco.
基金supported by the Natural Science Foundation of Sichuan Province of China under Grant No.2025ZNSFSC0522partially supported by the National Natural Science Foundation of China under Grants No.61775030 and No.61571096.
文摘Target tracking is an essential task in contemporary computer vision applications.However,its effectiveness is susceptible to model drift,due to the different appearances of targets,which often compromises tracking robustness and precision.In this paper,a universally applicable method based on correlation filters is introduced to mitigate model drift in complex scenarios.It employs temporal-confidence samples as a priori to guide the model update process and ensure its precision and consistency over a long period.An improved update mechanism based on the peak side-lobe to peak correlation energy(PSPCE)criterion is proposed,which selects high-confidence samples along the temporal dimension to update temporal-confidence samples.Extensive experiments on various benchmarks demonstrate that the proposed method achieves a competitive performance compared with the state-of-the-art methods.Especially when the target appearance changes significantly,our method is more robust and can achieve a balance between precision and speed.Specifically,on the object tracking benchmark(OTB-100)dataset,compared to the baseline,the tracking precision of our model improves by 8.8%,8.8%,5.1%,5.6%,and 6.9%for background clutter,deformation,occlusion,rotation,and illumination variation,respectively.The results indicate that this proposed method can significantly enhance the robustness and precision of target tracking in dynamic and challenging environments,offering a reliable solution for applications such as real-time monitoring,autonomous driving,and precision guidance.
文摘The nature of pramāṅa system,outlined by Dignāga(c.480-540 CE)and further elaborated upon by Dharmakīrti(c.600-660 CE),is an important part of the Buddhist logico-epistemological tradition.Within this pramāṅa system,self-awareness(svasaṃvedana)is considered a hallmark of the access to the mental states and factors.However,some of the key research often focuses on interpreting the valid cognition system and self-awareness separately,lacking specific descriptions of their interrelationship.This paper argues that self-awareness is not merely a byproduct of valid cognition but is intimately connected to it.Specifically,I posit that self-awareness should be regarded as the ultimate result of valid cognition within the Pramāṇa system.
基金supported in part by grants from the National Natural Science Foundation of China(32472141,32101746,and 32102231)Natural Science Foundation of Hubei Province(JCZRLH202500540,2021CFB033,and 2022CFB393)。
文摘Rice grain size and chalkiness are important traits that influence grain yield and quality,respectively.Mining of genes for grain yield and appearance quality and clarification of their action modes are of great importance in rice breeding.In this study,a rice protein disulfide isomerase-like enzyme PDIL2-3 was characterized.Expression analysis revealed that PDIL2-3 was highly expressed in endosperm and spikelet hulls.The PDIL2-3-cri lines generated by CRISPR/Cas9 technology exhibited a chalky grain phenotype with altered storage substance accumulation and increased grain size and weight,whereas exactly opposite results were obtained for PDIL2-3 overexpression lines.Cytological experiments revealed that PDIL2-3-cri increased rice seed length mainly by increasing the cell number and rice seed width mainly by increasing the cell size in grains,implying that PDIL2-3 regulates the grain size by influencing both cell division and expansion of spikelet hulls.Further flow cytometric analysis validated that PDIL2-3 has a negative effect on cell proliferation,preventing DNA duplication and cell division in spikelet hulls.Moreover,q RT-PCR results showed that the expression levels of genes related to cell cycle and storage substance synthesis were significantly changed in PDIL2-3-cri transgenic lines.Thus,our results indicated that PDIL2-3 plays a pivotal role in influencing grain size and quality of rice by affecting cell division/expansion and storage substance accumulation,providing new insights into the function of PDIL family members in rice and enriching the genetic resources for rice breeding.
基金supported by the National Natural Science Foundation of China(Grant No.12272029).
文摘Lumbar degeneration leads to changes in geometry and density distribution of vertebrae,which could further influence the mechanical property and behavior.This study aimed to quantitatively describe the variations in shape and density distribution for degenerated vertebrae by statistical models,and utilized the specific statistical shape model(SSM)/statistical appearance model(SAM)modes to assess compressive strength and fracture behavior.Highly detailed SSM and SAM were developed based on the 75 L1 vertebrae of elderly men,and their variations in shape and density distribution were quantified with principal component(PC)modes.All vertebrae were classified into mild(n=22),moderate(n=29),and severe(n=24)groups according to the overall degree of degeneration.Quantitative computed tomography-based finite element analysis was used to calculate compressive strength for each L1 vertebra,and the associations between compressive strength and PC modes were evaluated by multivariable linear regression(MLR).Moreover,the distributions of equivalent plastic strain(PEEQ)for the vertebrae assigned with the first modes of SSM and SAM at mean±3SD were investigated.The Leave-One-Out analysis showed that our SSM and SAM had good performance,with mean absolute errors of 0.335±0.084 mm and 64.610±26.620 mg/cm3,respectively.A reasonable accuracy of bone strength prediction was achieved by using four PC modes(SSM 1,SAM 1,SAM 4,and SAM 5)to construct the MLR model.Furthermore,the PEEQ values were more sensitive to degeneration-related variations of density distribution than those of morphology.The density variations may change the deformity type(compression deformity or wedge deformity),which further affects the fracture pattern.Statistical models can identify the morphology and density variations in degenerative vertebrae,and the SSM/SAM modes could be used to assess compressive strength and fracture behavior.The above findings have implications for assisting clinicians in pathological diagnosis,fracture risk assessment,implant design,and preoperative planning.
文摘Background:Restrained eating,often motivated by the desire to control weight,is prevalent among young female college students and is considered a risk factor for eating disorders.Negative evaluation fear,exacerbated by social pressure,peer comparison,and academic stress,has been identified as a potential contributor to restrained eating behavior.However,research exploring the relationship between negative evaluation fear and restrained eating,particularly in the context of self-esteem and physical appearance perfectionism,remains limited.This study aims to investigate these relationships and design an intervention program to reduce restrained eating behaviors in female college students.Methods:Study 1 involved 617 female college students,using the Physical Appearance Perfectionism Scale,Rosenberg Self-Esteem Scale,Fear of Negative Evaluation Scale,and Dutch Eating Behavior Questionnaire to measure key variables.We examined the relationships between physical appearance perfectionism,self-esteem,fear of negative evaluation,and restrained eating.In Study 2,a 4-week group psychological intervention based on Acceptance and Commitment Therapy(ACT)was implemented with 45 students,divided into experimental,control,and placebo groups.The intervention’s effectiveness was assessed in reducing restrained eating and negative evaluation fear.Results:The study found that fear of negative evaluation significantly predicted restrained eating and physical appearance perfectionism.Physical appearance perfectionism,in turn,positively predicted restrained eating and partially mediated the relationship between negative evaluation fear and restrained eating.Self-esteem moderated this mediation effect.Additionally,the ACT-based intervention significantly reduced fear of negative evaluation and restrained eating behavior in the experimental group.Conclusion:This study identifies fear of negative evaluation and physical appearance perfectionism as key predictors of restrained eating in female college students.Fear of negative evaluation significantly predicted restrained eating,with physical appearance perfectionism partially mediating this relationship.The ACT-based intervention effectively reduced both fear of negative evaluation and restrained eating.These findings highlight the importance of addressing negative evaluation fear and appearance perfectionism in interventions for restrained eating.
基金financially supported by the Vice-Rector’s Office for Research and Transfer at the University of Granada(Grant Ref.PPJIB2023-084)Spanish Ministry of Universities(Grants Ref.FPU20/02739 and FPU20/01987)+1 种基金Maria de Maeztu Excellence Unit Program funded by the Ministry of Science,Innovation and Ministry of Universities attached to the State Research Agency(Grant Ref.CEX2023-001312-M/AEI/10.13039/501100011033)the Excellence Unit funded by the University of Granada(Grant Ref.UCE-PP2023-11/UGR.).
文摘Background:University students face significant challenges inmaintaining healthy physical activity(PA)and dietary habits,and they often fall short of global health recommendations.Psychological factors such as social physique anxiety,body image concerns,and self-objectification may act as barriers to PA engagement,influencing both mental and physical health.The present study constructed a structural equation model(SEM)to examine the relationship between body image-related psychological factors and resistance to PA in university students from southern Spain.Methods:A cross-sectional and correlational study was conducted with 519 university students(74%females,26%males;Mean age=21.14±3.26 years)from universities in Granada and Malaga(Spain).Data were collected between May and October 2024 via online questionnaires that assessed PA engagement,Mediterranean diet adherence,eating disorder symptoms,body image-related psychological factors(social physique anxiety,appearance control beliefs,body surveillance,body shame,and self-esteem),and sociodemographic characteristics.SEM was performed to analyze relationships and sex-based differences.Results:Social physique anxietywas positively associated with body shame,body surveillance,and eating disorders,and negatively associated with self-esteem,PA engagement,and appearance control beliefs(all p<0.001).Appearance control beliefs were positively related to self-esteem,body surveillance,and PA(all p<0.05).Body surveillance was negatively linked to PA and positively linked to body shame.Mediterranean diet adherence and eating disorders were positively associated with PA(all p<0.001).Sex-based differences were observed in the model.Conclusion:Body image-related psychological factors may act as barriers to PA among university students.Interventions should integrate mental health promotion and consider sex differences.
基金supported by the Comprehensive Research Facility for Fusion Technology Program of China(No.2018000052-73-01-001228)National Natural Science Foundation of China(No.11975263)Postgraduate Research and Practice Innovation Program of NUAA(No.xcxjh20231501)。
文摘The negative ion based neutral beam injector(NNBI)with a beam energy of 400 keV is one of the subsystems at the Comprehensive Research fAcility for Fusion Technology(CRAFT)in China.The distributed capacitance of the high-voltage components is an important basis for the design of surge suppression devices at CRAFT NNBI.This study conducted calculations of distributed capacitance for the key components,including the high-voltage deck,transmission line and isolation transformer in the power supply system using the finite element method.The relationship between the high-voltage deck(HVD)distributed capacitance and the distance from the wall is discussed.The differences in distributed capacitance and energy storage between noncoaxial and coaxial transmission lines are also debated.Finally,the capacitance between the primary and secondary windings of the-400 kV isolation transformer,as well as between the secondary winding and the oil tank casing,was calculated.
文摘This work presents a grounding protection system of the central solenoid model coil(CSMC)of the Comprehensive Research Facility for Fusion Technology(CRAFT).The scheme of neutral point voltage detections has been adopted in grounding protection system.Compared with the usual current acquisition,the measurement data is accurate,there is no redundant loop,and the economic benefit is high.In this study,the single-end and double-end grounding fault protections of superconducting magnet coil are analyzed,and the fault voltage and current under different fault conditions are calculated.The simulation model of CSMC magnet grounding fault is established,and the simulation results of the model are basically consistent with the theoretical calculation.Finally,a small capacity experiment platform is used to verify the function of the grounding protection system.The experimental results show that by comparing the neutral fault sampling voltage with the theoretical grounding protection threshold,the grounding protection system can effectively detect different types of grounding faults and transmit signals to the control system to protect the coils of superconducting magnets.
基金the financial support of National Natural Science Foundation of China(Nos.52207175 and 52407178)。
文摘When discharge faults occur in dry air switchgear,the air decomposes to produce diverse gases,with NO_(2) reaching the highest levels.Detecting the NO_(2) level can reflect the operation status of the equipment.This paper proposes to combine ZnO cluster with MoS_(2) to improve the gassensitive properties of the monolayer.Based on the Density Functional Theory(DFT),the effect of(ZnO)n size on the behavior of MoS_(2 )is considered.Key parameters such as adsorption energy and band gap of(ZnO)n-MoS_(2)/NO_(2) system were calculated.The ZnO-MoS_(2) heterojunction was successfully synthesized by a hydrothermal method.The gas sensor exhibits a remarkable response and a fast response-recovery time to 100 ppm NO_(2).In addition,it demonstrates excellent selectivity,long-term stability and a low detection limit.This work confirms the potential of the ZnO-MoS_(2) composite structure as a highly effective gas sensor for NO_(2) detection,which provides valuable theoretical and experimental insights for fault detection in dry air switchgear.
基金supported by National Natural Science Foundation of China(Nos.52077026,51977023,52177126 and 12475253)the Fundamental Research Funds for the Central Universities(No.DUT23YG227)the Dalian Life&Health Guiding Project(No.2023ZXYG34)。
文摘In this study,we explored a one-step direct synthesis of NH3 under mild experimental conditions utilizing pulse-modulated microwave plasma technology at atmospheric pressure.At a substantial gas flow rate,a microwave plasma jet was formed and the microwave-assisted ammonia synthesis can be realized.Impacts of various parameters including the gas flow rate,gas component,microwave absorbed power,pulse modulation frequency,and pulse duty cycle on ammonia synthesis were systematically investigated.To indicate the reaction path of ammonia synthesis,the distributions of both the gas temperature and active species were also studied using optical emission spectra technology.It is found that a considerable amount of ammonia was directly synthesized without involvement of any catalysts,the highest ammonia production rate and energy efficiency(EE),up to 2.93μmol·min^(-1) and 6.64×10^(-2)g·(k W·h)^(-1),respectively,were achieved under low microwave power of 84.42 W.The duty cycle has obvious influences on the synthesis efficiency,compared to a duty cycle of 80%,the ammonia synthesis rate,EE and nitrogen conversion decreased by about 22%at a duty cycle of 100%.This finding underscores the significance of incorporating pulse modulation in the microwave discharge process for ammonia synthesis.Furthermore,it was found that vibrational excitation of microwave plasma has a significant driving effect on ammonia synthesis.
基金supported by Science and Technology Major Project of Hubei Province in China(No.2021AFB001)。
文摘In laser wakefield acceleration,injecting an external electron beam at a certain energy is a promising approach for achieving a high-quality electron beam with low energy spread and low emittance.In this paper,the process of laser wakefield acceleration with an external injection at 10 pC has been studied in simulations.A Bayesian optimization method is used to optimize the key laser and plasma parameters so that the electron beam is accelerated to the expected energy with a small emittance and energy spread growth.The effect of the rising edge of the plasma on the transverse properties of the electron beam is simulated and optimized in order to ensure that the external electron beam is injected into the plasma without significant emittance growth.Finally,a high-quality electron beam with an energy of 1.5 GeV,a normalized transverse emittance of 0.5 mm·mrad and a relative energy spread of 0.5%at 10 pC is obtained.
