Traumatic cervical spinal cord injury （SCI）, with an annual incidence of 12,000 new cases in USA （NSCISC 2013）, causes devastating locomotor and respiratory paralysis and unfortunately compromises the human patien...Traumatic cervical spinal cord injury （SCI）, with an annual incidence of 12,000 new cases in USA （NSCISC 2013）, causes devastating locomotor and respiratory paralysis and unfortunately compromises the human patient＇s lifespan. The severity of the injury depends on the degree and the extent of the initial trauma. In fact, respiratory failure is the leading cause of mortality following upper cervical SCI. However, 80% of the injuries are incomplete, allowing some modest spontaneous recovery. To date, no effective treatment is available in order to restore the loss of function.展开更多
Blindness provides an unparalleled opportunity to study plasticity of the nervous system in humans.Seminal work in this area examined the often dramatic modifications to the visual cortex that result when visual input...Blindness provides an unparalleled opportunity to study plasticity of the nervous system in humans.Seminal work in this area examined the often dramatic modifications to the visual cortex that result when visual input is completely absent from birth or very early in life（Kupers and Ptito,2014）.More recent studies explored what happens to the visual pathways in the context of acquired blindness.This is particularly relevant as the majority of diseases that cause vision loss occur in the elderly.展开更多
Theoretical frameworks play a vital role in research, spelling out the constructs important in the research area, and the relationships between the constructs. An understanding of the theoretical constructs which unde...Theoretical frameworks play a vital role in research, spelling out the constructs important in the research area, and the relationships between the constructs. An understanding of the theoretical constructs which underpin the research provides researchers with a framework, which enables them to understand when, how and why particular phenomena occur. Depending on the type of research, this either allows them to make reasoned predictions, which can be empirically tested during the research or gives direction for the research if it is open-ended and exploratory. Such frameworks not only guide the questions asked and the design of the research, but also help to interpret the data. If the situation being investigated is very complex, involving numerous interlinked variables, it is often difficult to identify a single theoretical framework that is suitable for a particular study. This article uses the case of human ecological behavioural problems associated with the conservation of biodiversity in the Rwenzori Mountains National Park, to show how a theoretical framework to investigate a complex situation was developed.展开更多
The paper investigated"The Third Place"within Chinese language students' community in the university of Newcastle(Uo N). Through the investigation, critical analysis has been given by comparing the behav...The paper investigated"The Third Place"within Chinese language students' community in the university of Newcastle(Uo N). Through the investigation, critical analysis has been given by comparing the behaviour and performance of two types of Chinese students within the community. Moreover, critical questions have arisen: Is the teacher in the language room really the best catalyst to create"The Third Place"? How should Chinese students make use of wider context to contest their native culture? The paper further described a sociocultural framework which indicates"The Third Place"should not be an isolated knowledge to be learn, but happens through constant information exchange with the outside world and socialising. Critical applications have also been given to guide how to make"The Third Place"occur within Chinese language community smoothly.展开更多
Brucellosis is an important zoonosis that results in substantial economic losses to the livestock industry through abortions and reduced milk yield.This study investigated an abortion outbreak in a dairy herd and then...Brucellosis is an important zoonosis that results in substantial economic losses to the livestock industry through abortions and reduced milk yield.This study investigated an abortion outbreak in a dairy herd and then explored the efects of emergency vaccination with Brucella abortus A19 vaccine on the incidence of abortion and milk yield.A full dose of vaccine(6×10^(10)—12×10^(10)colony forming units,CFU)was administered subcutaneously to calves and non-pregnant heifers,and a reduced dose(6×10^(8)—12×10^(8)CFU)to adult cows and pregnant replacement heifers.Rose Bengal Test was used to screen Brucella infection status and then positive samples were tested with a C-ELISA.Animals that tested positive for both tests were considered positive to Brucella spp.The animal-level seroprevalence of brucellosis was 23.1%(95%CI:17.0,30.2),and the attributable fraction of abortions in seropositive animals was 89.1%(95%CI:64.3,96.7).The odds of seropositivity were signifcantly higher in cows that aborted compared to cows that calved normally(OR=21.4,95%CI:4.4,168.4).Cows in sheds A2 and C1 were 10.2(95%CI:1.4,128.0)and 17.0(95%CI:2.8,190.3)times more likely to be seropositive than cows in shed B1.Antibodies were not detectable in most heifers 12 months post-vaccination.The efectiveness of the vaccine in preventing abortions was estimated to be 56.8%(95%CI:15.8,77.8)for the entire herd,but increased to 86.7%(95%CI:4.4,98.1)when only primiparous heifers were considered.Furthermore,a signifcant increase in the average herd 305-day milk yield one-year after vaccination was also observed relative to that in the previous three years.It is concluded that emergency vaccination of a dairy herd undergoing an abortion outbreak with the A19 vaccine efectively reduced the incidence of abortion and indirectly increased milk yield one-year after vaccination.展开更多
With the increasing income of the rural population in Northwest China,people’s sense of happiness and gain is also increasing.However,the improvement of housing conditions is lagging behind the increasing income leve...With the increasing income of the rural population in Northwest China,people’s sense of happiness and gain is also increasing.However,the improvement of housing conditions is lagging behind the increasing income levels.In recent years,the government and owners have paid much attention to this issue.The local government has successively issued relevant guidelines and policies to encourage owners to reconstruct their houses and improve their housing conditions.Before improving housing conditions,the existing housing problems must be identified.In order to have a comprehensive and in-depth understanding of the problems of rural residential buildings in Northwest China and to propose corresponding solutions,90 representative rural residential buildings of three provinces in Northwest China have been selected for investigation,and mass data have been obtained.Upon analyzing these data,it has been found that there are problems in five aspects of rural residential buildings in Northwest China:architectural style and functional space layout,energy utilization and dissipation,design,construction,as well as structural safety and seismic measures.Valid solutions are proposed to address these problems,which can also provide a reference for the government and enterprises engaged in the architecture,engineering,and construction(AEC)industry in rural areas.展开更多
Based on a comprehensive investigation of the employment status of architectural design graduates at a certain university,this paper analyzes the correctness of the talent development direction of architectural design...Based on a comprehensive investigation of the employment status of architectural design graduates at a certain university,this paper analyzes the correctness of the talent development direction of architectural design in hopes of pro-viding a valuable reference for further teaching reform and strengthening school-enterprise collaboration.The research re-sults show that architectural design is the main choice of graduates,accounting for as high as 63%,and traditional architec-tural design skills continue to be in demand in the market.Employment in fields such as interior design,BIM design,and green architecture is also included.The distribution of job positions for graduates is mainly in the areas of scheme design assistants and construction drawing design,requiring software operation,communication,scheme design,and construction drawing skills.This paper also proposes talent development measures such as optimizing the curriculum,strengthening faculty construction,and deepening school-enterprise collaboration,in order to improve the quality of talent development and the competitiveness of graduates.展开更多
The composite structures/components made by friction stir lap welding(FSLW)of Mg alloy sheet and Al alloy sheet are of wide application potentials in the manufacturing sector of transportation vehicles.To further impr...The composite structures/components made by friction stir lap welding(FSLW)of Mg alloy sheet and Al alloy sheet are of wide application potentials in the manufacturing sector of transportation vehicles.To further improve the joint quality,the ultrasonic vibration(UV)is exerted in FSLW,and the UV enhanced FSLW(UVeFSLW)was developed for making Mg-to-Al dissimilar joints.The numerical analysis and experimental investigation were combined to study the process mechanism in Mg/Al UVeFSLW.An equation related to the temperature and strain rate was derived to calculate the grain size at different locations of the weld nugget zone,and the effect of grain size distribution on the threshold thermal stress was included,so that the prediction accuracy of flow stress was further improved.With such modified constitutive equation,the numerical simulation was conducted to compare the heat generation,temperature profiles and material flow behaviors in Mg/Al UVeFSLW/FSLW processes.It was found that the exerted UV decreased the temperature at two checking points on the tool/workpiece interface from 707/671 K in FSLW to 689/660 K in UVeFSLW,which suppressed the IMCs thickness at Mg-Al interface from 1.7μm in FSLW to 1.1μm in UVeFSLW.The exerted UV increased the horizontal materials flow ability,and decreased the upward flow ability,which resulted in the increase of effective sheet thickness/effective lap width from 2.01/3.70 mm in FSLW to 2.04/4.84 mm in UVeFSLW.Therefore,the ultrasonic vibration improved the tensile shear strength of Mg-to-Al lap joints by 18%.展开更多
Scientific and technological advancements are rapidly transforming underground engineering,shifting from labor-intensive,time-consuming methods to automated,real-time systems.This timely and comprehensive review cover...Scientific and technological advancements are rapidly transforming underground engineering,shifting from labor-intensive,time-consuming methods to automated,real-time systems.This timely and comprehensive review covers in-situ testing,intelligent monitoring,and geophysical testing methods,highlighting fundamental principles,testing apparatuses,data processing techniques,and engineering applications.The state-of-the-art summary emphasizes not only cutting-edge innovations for complex and harsh environments but also the transformative role of artificial intelligence and machine learning in data interpretations.The integration of big data and advanced algorithms is particularly impactful,enabling the identification,prediction,and mitigation of potential risks in underground projects.Key aspects of the discussion include detection capabilities,method integration,and data convergence of intelligent technologies to drive enhanced safety,operational efficiency,and predictive reliability.The review also examines future trends in intelligent technologies,emphasizing unified platforms that combine multiple methods,real-time data,and predictive analytics.These advancements are shaping the evolution of underground construction and maintenance,aiming for risk-free,high-efficiency underground engineering.展开更多
BACKGROUND Gestational diabetes mellitus(GDM)is a growing public health concern,particularly in regions with diverse ethnic populations.Understanding the incidence and risk factors of GDM is crucial for early preventi...BACKGROUND Gestational diabetes mellitus(GDM)is a growing public health concern,particularly in regions with diverse ethnic populations.Understanding the incidence and risk factors of GDM is crucial for early prevention and management,especially in underrepresented areas like Guizhou Province,China,where geographic and ethnic diversity may influence the disease’s prevalence and risk profiles.AIM To investigate the incidence of GDM and identify its associated risk and protective factors among different ethnic groups in Guizhou Province,providing essential data for early prevention strategies.METHODS A multi-center retrospective study was conducted,dividing participants into GDM and non-GDM groups according to standardized diagnostic criteria.Data were collected from 103629 deliveries across 40 hospitals in Guizhou.Various demographic,clinical,and laboratory parameters were analyzed using logistic regression to identify risk and protective factors for GDM.RESULTS Among the 103629 deliveries,18957 cases of GDM were identified,with an incidence of approximately 18.3%.The risk of GDM was higher in the Han ethnic group compared to minority ethnic groups.The Dong ethnic group had the lowest incidence among the minorities.Key risk factors identified included older age(especially>35 years),higher pre-pregnancy body mass index(BMI),light physical activity,gravidity,family history of diabetes,hemoglobin,aspartate aminotransferase,alanine aminotransferase,and direct bilirubin.Protective factors included higher education level,total protein,and albumin.There were also differences based on blood type,with type A associated with higher risk.CONCLUSION The incidence rate in Guizhou is 18.3%.Older age(especially>35 years),Han ethnicity,lower education level,higher pre-pregnancy BMI,light physical activity,and higher gravidity are the main risk factors for GDM.Laboratory findings indicate that higher hemoglobin,higher liver function parameters(alanine aminotransferase,aspartate aminotransferase,and direct bilirubin),and lower total protein and albumin are associated with a higher risk of GDM.Blood type A has a higher risk of GDM compared to blood types AB and O.展开更多
One of the detection objectives of the Chinese Asteroid Exploration mission is to investigate the space environment near the Main-belt Comet(MBC,Active Asteroid)311P/PANSTARRS.This paper outlines the scientific object...One of the detection objectives of the Chinese Asteroid Exploration mission is to investigate the space environment near the Main-belt Comet(MBC,Active Asteroid)311P/PANSTARRS.This paper outlines the scientific objectives,measurement targets,and measurement requirements for the proposed Gas and Ion Analyzer(GIA).The GIA is designed for in-situ mass spectrometry of neutral gases and low-energy ions,such as hydrogen,carbon,and oxygen,in the vicinity of 311P.Ion sampling techniques are essential for the GIA's Time-of-Flight(TOF)mass analysis capabilities.In this paper,we present an enhanced ion sampling technique through the development of an ion attraction model and an ion source model.The ion attraction model demonstrates that adjusting attraction grid voltage can enhance the detection efficiency of low-energy ions and mitigate the repulsive force of ions during sampling,which is influenced by the satellite's surface positive charging.The ion source model simulates the processes of gas ionization and ion multiplication.Simulation results indicate that the GIA can achieve a lower pressure limit below 10-13Pa and possess a dynamic range exceeding 10~9.These performances ensure the generation of ions with stable and consistent current,which is crucial for high-resolution and broad dynamic range mass spectrometer analysis.Preliminary testing experiments have verified GIA's capability to detect gas compositions such as H2O and N2.In-situ measurements near 311P using GIA are expected to significantly contribute to our understanding of asteroid activity mechanisms,the evolution of the atmospheric and ionized environments of main-belt comets,the interactions with solar wind,and the origin of Earth's water.展开更多
0 INTRODUCTION Geohazards in mountainous regions pose significant risks to the construction and safe operation of transportation,water conservancy,and other critical infrastructure projects.Engineering geological inve...0 INTRODUCTION Geohazards in mountainous regions pose significant risks to the construction and safe operation of transportation,water conservancy,and other critical infrastructure projects.Engineering geological investigations are crucial for disaster prevention and mitigation.展开更多
Polyploidization is a commonly employed strategy in crop breeding to augment genetic diversity,particularly leveraging the distinctive benefits of additional progressive heterosis or multi-generation heterosis unique ...Polyploidization is a commonly employed strategy in crop breeding to augment genetic diversity,particularly leveraging the distinctive benefits of additional progressive heterosis or multi-generation heterosis unique to polyploidy.Despite genetic disparities between polyploids and diploids,challenges stem from reproductive anomalies,complicating genetic investigations in polyploid systems.Through nearly two decades of intensive research,our team has effectively generated a series of fertile tetraploid lines known as neo-tetraploid rice(NTR),facilitating comparative genetic studies between diploid and tetraploid rice.In this study,we identified diploid counterparts(H3d and H8d)for two NTR lines[Huaduo 3(H3)and Huaduo 8(H8)]and utilized them to create diploid and tetraploid fertile F_(2) populations to assess genotype segregation ratios,recombination rates,and their impact on QTL mapping via bulked segregant analysis combined with sequencing(BSA-seq).Additionally,we assessed yield heterosis in F_(1) and F_(2) generations of two tetraploid populations(H3×H8 and T449×H1),revealing evidence of multi-generation heterosis in polyploid rice.These findings provide valuable insights into the advantages and challenges of polyploid rice breeding.展开更多
Investigation and analysis of the current status of farmers'livelihood capital and promptly discovering and solving problems in farmers'livelihood development are of great practical significance for optimizing...Investigation and analysis of the current status of farmers'livelihood capital and promptly discovering and solving problems in farmers'livelihood development are of great practical significance for optimizing farmers'livelihood strategies and enhancing farmers'livelihood sustainable development capability.Based on the framework of sustainable livelihood analysis,taking Yangshan County as an example,this paper uses field surveys,questionnaires and interviews to summarize and analyze the current status and characteristics and main problems of local farmers'livelihood capitals on the basis of the data of 628 farmer samples.It proposes countermeasures for future development of farmers'livelihoods.Implementing these strategies will be helpful for improving the livelihoods capital structure of farmers'and enhancing their sustainable development capability.展开更多
The editor regrets that they inadvertently pasted the wrong figure during the production stage.The correct Fig.7 should be as below:The editor would like to apologise for any inconvenience caused.
Based on the site investigation of a lightning stroke accident in a coal mine in Weiyuan County during a strong thunderstorm process on the night of August 10,2024,combined with the investigation data of the accident ...Based on the site investigation of a lightning stroke accident in a coal mine in Weiyuan County during a strong thunderstorm process on the night of August 10,2024,combined with the investigation data of the accident site,the causes of the lightning stroke accident were analyzed,and the corresponding rectification suggestions were put forward.展开更多
BACKGROUND Postmenopausal women with osteoporosis are at high risk of developing depre-ssive symptoms,necessitating specialized psychological nursing interventions.AIM To investigate factors influencing depressive sym...BACKGROUND Postmenopausal women with osteoporosis are at high risk of developing depre-ssive symptoms,necessitating specialized psychological nursing interventions.AIM To investigate factors influencing depressive symptoms in postmenopausal women with osteoporosis and develop targeted psychological nursing interven-tions.METHODS A total of 180 postmenopausal women with osteoporosis admitted to the Depar-tment of Orthopedics at the First Affiliated Hospital of Soochow University between October 2021 and October 2024 were selected as research participants.Information on age,duration of menopause,body mass index,education level,marital status,activity intensity,bone density,presence of chronic diseases,calcium supplement intake,sex hormone levels,and depressive symptoms were collected.The 24-item Hamilton Depression Scale was used for assessment.RESULTS Forty-eight patients had no depressive symptoms,and 132 patients had depre-ssive symptoms.Comprehensive univariate and multivariate logistic regression analyses showed that low bone density in the lumbar spine(L2-L4)and femoral neck,presence of chronic diseases,and low 5-hydroxytryptamine levels were independent risk factors for depressive symptoms,whereas calcium supplement intake and moderate to high-intensity activity were independent protective factors.CONCLUSION By implementing specialized psychological nursing interventions,and providing rehabilitation guidance,the incidence of depressive symptoms can be effectively reduced,improving the psychological health status and patient quality of life.展开更多
Aim:To evaluate the impact of professional training on pediatric outpatient nurses’cognition and attitudes towards the use of clown therapy,and to assess its clinical applicability.Design:A pre-and post-training eval...Aim:To evaluate the impact of professional training on pediatric outpatient nurses’cognition and attitudes towards the use of clown therapy,and to assess its clinical applicability.Design:A pre-and post-training evaluation study.Methods:A total of 31 pediatric outpatient nurses participated in the study,completing a self-designed 15-item questionnaire focused on clown therapy.The questionnaires were administered both before and after a structured training program.The assessment aimed to measure changes in nurses’knowledge and attitudes toward clown therapy.Results:The results indicated a statistically significant improvement in the nurses’cognition following the training(mean score post-training:8.55 vs pre-training:7.71,p=0.003).Conclusion:Notably,the training also eliminated the age-related differences in cognition observed prior to the intervention.Furthermore,nurses expressed more positive attitudes toward the clinical implementation of clown therapy post-training.展开更多
SnS,a well-known van der Waals chalcogenide,is susceptible to oxidation in high-temperature or highhumidity environments,significantly impacting its functional performance and device stability.Conversely,oxidation can...SnS,a well-known van der Waals chalcogenide,is susceptible to oxidation in high-temperature or highhumidity environments,significantly impacting its functional performance and device stability.Conversely,oxidation can be used as an effective strategy for surface engineering,allowing for structure modulation or design,property tuning and application exploration.However,there is currently a gap in understanding the relationship between the oxidation behavior of SnS,the structure of its oxidized surface,and the dependence on oxidation temperature.In this study,we systematically investigated the evolution of SnS surfaces under thermal oxidation using electron microscopy.The microstructure evolution(e.g.,surface structures,phases,defects,and interface)of SnS during high-temperature oxidation has been fully characterized and studied based on cross-sectional samples.Various surface heterostructures were constructed,including SnO_(2)/SnS,SnO_(2)/SnS_(2)/SnS,and SnO_(2)/Sn_(2)S_(3)/SnS,offering significant potential for the surface functionalization of SnS-based systems.Accordingly,oxidation mechanisms at different stages were elucidated based on the detailed and clear picture of microstructures.This research not only deepens our understanding of the fundamental science of SnS oxidation but also provides valuable insights for preventing and developing surface oxidation engineering in SnS and other van der Waals chalcogenides/materials.展开更多
基金supported by funding from the European Union Seventh framework Programme(FP7/2007-2013)under grant agreement No.246556(European project RBUCEUP)HandiMedEx allocated by the French Public Investment Board,the Chancellerie des Universités de Paris(Legs Poix),theand the
文摘Traumatic cervical spinal cord injury （SCI）, with an annual incidence of 12,000 new cases in USA （NSCISC 2013）, causes devastating locomotor and respiratory paralysis and unfortunately compromises the human patient＇s lifespan. The severity of the injury depends on the degree and the extent of the initial trauma. In fact, respiratory failure is the leading cause of mortality following upper cervical SCI. However, 80% of the injuries are incomplete, allowing some modest spontaneous recovery. To date, no effective treatment is available in order to restore the loss of function.
基金supported by National Institutes of Health Contracts P30-EY008098 and T32-EY017271-06(BethesdaMD)+14 种基金United States Department of Defense DM090217(ArlingtonVA)Alcon Research Institute Young Investigator Grant(Fort WorthTX)Eye and Ear Foundation(PittsburghPA)Research to Prevent Blindness(New YorkNY)Aging Institute Pilot Seed GrantUniversity of Pittsburgh(PittsburghPA)Postdoctoral Fellowship Program in Ocular Tissue Engineering and Regenerative OphthalmologyLouis J.Fox Center for Vision RestorationUniversity of Pittsburgh and UPMC(PittsburghPA)
文摘Blindness provides an unparalleled opportunity to study plasticity of the nervous system in humans.Seminal work in this area examined the often dramatic modifications to the visual cortex that result when visual input is completely absent from birth or very early in life（Kupers and Ptito,2014）.More recent studies explored what happens to the visual pathways in the context of acquired blindness.This is particularly relevant as the majority of diseases that cause vision loss occur in the elderly.
文摘Theoretical frameworks play a vital role in research, spelling out the constructs important in the research area, and the relationships between the constructs. An understanding of the theoretical constructs which underpin the research provides researchers with a framework, which enables them to understand when, how and why particular phenomena occur. Depending on the type of research, this either allows them to make reasoned predictions, which can be empirically tested during the research or gives direction for the research if it is open-ended and exploratory. Such frameworks not only guide the questions asked and the design of the research, but also help to interpret the data. If the situation being investigated is very complex, involving numerous interlinked variables, it is often difficult to identify a single theoretical framework that is suitable for a particular study. This article uses the case of human ecological behavioural problems associated with the conservation of biodiversity in the Rwenzori Mountains National Park, to show how a theoretical framework to investigate a complex situation was developed.
文摘The paper investigated"The Third Place"within Chinese language students' community in the university of Newcastle(Uo N). Through the investigation, critical analysis has been given by comparing the behaviour and performance of two types of Chinese students within the community. Moreover, critical questions have arisen: Is the teacher in the language room really the best catalyst to create"The Third Place"? How should Chinese students make use of wider context to contest their native culture? The paper further described a sociocultural framework which indicates"The Third Place"should not be an isolated knowledge to be learn, but happens through constant information exchange with the outside world and socialising. Critical applications have also been given to guide how to make"The Third Place"occur within Chinese language community smoothly.
基金supported by the earmarked fund for China Agriculture Research System(Beef/Yaks)(#CARS-37)National Science Foundation of Hubei Province(#2021CFA016).
文摘Brucellosis is an important zoonosis that results in substantial economic losses to the livestock industry through abortions and reduced milk yield.This study investigated an abortion outbreak in a dairy herd and then explored the efects of emergency vaccination with Brucella abortus A19 vaccine on the incidence of abortion and milk yield.A full dose of vaccine(6×10^(10)—12×10^(10)colony forming units,CFU)was administered subcutaneously to calves and non-pregnant heifers,and a reduced dose(6×10^(8)—12×10^(8)CFU)to adult cows and pregnant replacement heifers.Rose Bengal Test was used to screen Brucella infection status and then positive samples were tested with a C-ELISA.Animals that tested positive for both tests were considered positive to Brucella spp.The animal-level seroprevalence of brucellosis was 23.1%(95%CI:17.0,30.2),and the attributable fraction of abortions in seropositive animals was 89.1%(95%CI:64.3,96.7).The odds of seropositivity were signifcantly higher in cows that aborted compared to cows that calved normally(OR=21.4,95%CI:4.4,168.4).Cows in sheds A2 and C1 were 10.2(95%CI:1.4,128.0)and 17.0(95%CI:2.8,190.3)times more likely to be seropositive than cows in shed B1.Antibodies were not detectable in most heifers 12 months post-vaccination.The efectiveness of the vaccine in preventing abortions was estimated to be 56.8%(95%CI:15.8,77.8)for the entire herd,but increased to 86.7%(95%CI:4.4,98.1)when only primiparous heifers were considered.Furthermore,a signifcant increase in the average herd 305-day milk yield one-year after vaccination was also observed relative to that in the previous three years.It is concluded that emergency vaccination of a dairy herd undergoing an abortion outbreak with the A19 vaccine efectively reduced the incidence of abortion and indirectly increased milk yield one-year after vaccination.
基金Funding 2021 Ministry of Housing and Urban-Rural Development Science and Technology Project(Project Number:2021-k-154)Gansu Agricultural University Sheng Tongsheng Science and Technology Innovation Fund Project(Project Number:GSAU-STS-2018-33).
文摘With the increasing income of the rural population in Northwest China,people’s sense of happiness and gain is also increasing.However,the improvement of housing conditions is lagging behind the increasing income levels.In recent years,the government and owners have paid much attention to this issue.The local government has successively issued relevant guidelines and policies to encourage owners to reconstruct their houses and improve their housing conditions.Before improving housing conditions,the existing housing problems must be identified.In order to have a comprehensive and in-depth understanding of the problems of rural residential buildings in Northwest China and to propose corresponding solutions,90 representative rural residential buildings of three provinces in Northwest China have been selected for investigation,and mass data have been obtained.Upon analyzing these data,it has been found that there are problems in five aspects of rural residential buildings in Northwest China:architectural style and functional space layout,energy utilization and dissipation,design,construction,as well as structural safety and seismic measures.Valid solutions are proposed to address these problems,which can also provide a reference for the government and enterprises engaged in the architecture,engineering,and construction(AEC)industry in rural areas.
基金Education Research and Reform Projects of Shenzhen Polytechnic University,China(Project No.7022310092)2022 Green Building Design Golden Course Construction Project of Shenzhen Polytechnic University,China+3 种基金2023 Guangdong Provincial Education and Teaching Reform Research and Practice Project,China2021 College Student Innovation Project of Shenzhen Polytechnic University,China(Project No.P-20210607-39632)2023 Education and Teaching Reform Project of the Higher Vocational Civil Engineering and Water Resources Instruction Committee of Guangdong Province,China(Project No.2023TJSL21)The Class II Brand Specialty Construction of the Guangdong Province,China(Project No.9004-02200202)。
文摘Based on a comprehensive investigation of the employment status of architectural design graduates at a certain university,this paper analyzes the correctness of the talent development direction of architectural design in hopes of pro-viding a valuable reference for further teaching reform and strengthening school-enterprise collaboration.The research re-sults show that architectural design is the main choice of graduates,accounting for as high as 63%,and traditional architec-tural design skills continue to be in demand in the market.Employment in fields such as interior design,BIM design,and green architecture is also included.The distribution of job positions for graduates is mainly in the areas of scheme design assistants and construction drawing design,requiring software operation,communication,scheme design,and construction drawing skills.This paper also proposes talent development measures such as optimizing the curriculum,strengthening faculty construction,and deepening school-enterprise collaboration,in order to improve the quality of talent development and the competitiveness of graduates.
基金supported by the National Natural Science Foundation of China(Grant No.52035005)the Key R&D Program of Shandong Province in China(Grant No.2021ZLGX01).
文摘The composite structures/components made by friction stir lap welding(FSLW)of Mg alloy sheet and Al alloy sheet are of wide application potentials in the manufacturing sector of transportation vehicles.To further improve the joint quality,the ultrasonic vibration(UV)is exerted in FSLW,and the UV enhanced FSLW(UVeFSLW)was developed for making Mg-to-Al dissimilar joints.The numerical analysis and experimental investigation were combined to study the process mechanism in Mg/Al UVeFSLW.An equation related to the temperature and strain rate was derived to calculate the grain size at different locations of the weld nugget zone,and the effect of grain size distribution on the threshold thermal stress was included,so that the prediction accuracy of flow stress was further improved.With such modified constitutive equation,the numerical simulation was conducted to compare the heat generation,temperature profiles and material flow behaviors in Mg/Al UVeFSLW/FSLW processes.It was found that the exerted UV decreased the temperature at two checking points on the tool/workpiece interface from 707/671 K in FSLW to 689/660 K in UVeFSLW,which suppressed the IMCs thickness at Mg-Al interface from 1.7μm in FSLW to 1.1μm in UVeFSLW.The exerted UV increased the horizontal materials flow ability,and decreased the upward flow ability,which resulted in the increase of effective sheet thickness/effective lap width from 2.01/3.70 mm in FSLW to 2.04/4.84 mm in UVeFSLW.Therefore,the ultrasonic vibration improved the tensile shear strength of Mg-to-Al lap joints by 18%.
基金supported by Ministry of Education of Singapore,under Academic Research Fund Tier 1(Grant Number RG143/23).
文摘Scientific and technological advancements are rapidly transforming underground engineering,shifting from labor-intensive,time-consuming methods to automated,real-time systems.This timely and comprehensive review covers in-situ testing,intelligent monitoring,and geophysical testing methods,highlighting fundamental principles,testing apparatuses,data processing techniques,and engineering applications.The state-of-the-art summary emphasizes not only cutting-edge innovations for complex and harsh environments but also the transformative role of artificial intelligence and machine learning in data interpretations.The integration of big data and advanced algorithms is particularly impactful,enabling the identification,prediction,and mitigation of potential risks in underground projects.Key aspects of the discussion include detection capabilities,method integration,and data convergence of intelligent technologies to drive enhanced safety,operational efficiency,and predictive reliability.The review also examines future trends in intelligent technologies,emphasizing unified platforms that combine multiple methods,real-time data,and predictive analytics.These advancements are shaping the evolution of underground construction and maintenance,aiming for risk-free,high-efficiency underground engineering.
基金National Natural Science Foundation of China,No.81960284Science and Technology Support Program of Science and Technology Department of Guizhou Province,No.Qian Ke He Zhi Cheng[2022]Yi Ban 183.
文摘BACKGROUND Gestational diabetes mellitus(GDM)is a growing public health concern,particularly in regions with diverse ethnic populations.Understanding the incidence and risk factors of GDM is crucial for early prevention and management,especially in underrepresented areas like Guizhou Province,China,where geographic and ethnic diversity may influence the disease’s prevalence and risk profiles.AIM To investigate the incidence of GDM and identify its associated risk and protective factors among different ethnic groups in Guizhou Province,providing essential data for early prevention strategies.METHODS A multi-center retrospective study was conducted,dividing participants into GDM and non-GDM groups according to standardized diagnostic criteria.Data were collected from 103629 deliveries across 40 hospitals in Guizhou.Various demographic,clinical,and laboratory parameters were analyzed using logistic regression to identify risk and protective factors for GDM.RESULTS Among the 103629 deliveries,18957 cases of GDM were identified,with an incidence of approximately 18.3%.The risk of GDM was higher in the Han ethnic group compared to minority ethnic groups.The Dong ethnic group had the lowest incidence among the minorities.Key risk factors identified included older age(especially>35 years),higher pre-pregnancy body mass index(BMI),light physical activity,gravidity,family history of diabetes,hemoglobin,aspartate aminotransferase,alanine aminotransferase,and direct bilirubin.Protective factors included higher education level,total protein,and albumin.There were also differences based on blood type,with type A associated with higher risk.CONCLUSION The incidence rate in Guizhou is 18.3%.Older age(especially>35 years),Han ethnicity,lower education level,higher pre-pregnancy BMI,light physical activity,and higher gravidity are the main risk factors for GDM.Laboratory findings indicate that higher hemoglobin,higher liver function parameters(alanine aminotransferase,aspartate aminotransferase,and direct bilirubin),and lower total protein and albumin are associated with a higher risk of GDM.Blood type A has a higher risk of GDM compared to blood types AB and O.
基金Supported by the National Natural Science Foundation of China(42474239,41204128)China National Space Administration(Pre-research project on Civil Aerospace Technologies No.D010301)Strategic Priority Research Program of the Chinese Academy of Sciences(XDA17010303)。
文摘One of the detection objectives of the Chinese Asteroid Exploration mission is to investigate the space environment near the Main-belt Comet(MBC,Active Asteroid)311P/PANSTARRS.This paper outlines the scientific objectives,measurement targets,and measurement requirements for the proposed Gas and Ion Analyzer(GIA).The GIA is designed for in-situ mass spectrometry of neutral gases and low-energy ions,such as hydrogen,carbon,and oxygen,in the vicinity of 311P.Ion sampling techniques are essential for the GIA's Time-of-Flight(TOF)mass analysis capabilities.In this paper,we present an enhanced ion sampling technique through the development of an ion attraction model and an ion source model.The ion attraction model demonstrates that adjusting attraction grid voltage can enhance the detection efficiency of low-energy ions and mitigate the repulsive force of ions during sampling,which is influenced by the satellite's surface positive charging.The ion source model simulates the processes of gas ionization and ion multiplication.Simulation results indicate that the GIA can achieve a lower pressure limit below 10-13Pa and possess a dynamic range exceeding 10~9.These performances ensure the generation of ions with stable and consistent current,which is crucial for high-resolution and broad dynamic range mass spectrometer analysis.Preliminary testing experiments have verified GIA's capability to detect gas compositions such as H2O and N2.In-situ measurements near 311P using GIA are expected to significantly contribute to our understanding of asteroid activity mechanisms,the evolution of the atmospheric and ionized environments of main-belt comets,the interactions with solar wind,and the origin of Earth's water.
基金financially supported by the National Key R&D Program of China(No.2022YFC3080200)。
文摘0 INTRODUCTION Geohazards in mountainous regions pose significant risks to the construction and safe operation of transportation,water conservancy,and other critical infrastructure projects.Engineering geological investigations are crucial for disaster prevention and mitigation.
基金supported by the National Key Resarch and Development Program of China(Grant No.2023YFD1200802)the Base Bank of Lingnan Rice Germplasm Resources Project,China(Grant No.2024B1212060009).
文摘Polyploidization is a commonly employed strategy in crop breeding to augment genetic diversity,particularly leveraging the distinctive benefits of additional progressive heterosis or multi-generation heterosis unique to polyploidy.Despite genetic disparities between polyploids and diploids,challenges stem from reproductive anomalies,complicating genetic investigations in polyploid systems.Through nearly two decades of intensive research,our team has effectively generated a series of fertile tetraploid lines known as neo-tetraploid rice(NTR),facilitating comparative genetic studies between diploid and tetraploid rice.In this study,we identified diploid counterparts(H3d and H8d)for two NTR lines[Huaduo 3(H3)and Huaduo 8(H8)]and utilized them to create diploid and tetraploid fertile F_(2) populations to assess genotype segregation ratios,recombination rates,and their impact on QTL mapping via bulked segregant analysis combined with sequencing(BSA-seq).Additionally,we assessed yield heterosis in F_(1) and F_(2) generations of two tetraploid populations(H3×H8 and T449×H1),revealing evidence of multi-generation heterosis in polyploid rice.These findings provide valuable insights into the advantages and challenges of polyploid rice breeding.
基金Supported by Guangdong Province Philosophy and Social Science Planning Project(GD24CGL18&GD23CGL02).
文摘Investigation and analysis of the current status of farmers'livelihood capital and promptly discovering and solving problems in farmers'livelihood development are of great practical significance for optimizing farmers'livelihood strategies and enhancing farmers'livelihood sustainable development capability.Based on the framework of sustainable livelihood analysis,taking Yangshan County as an example,this paper uses field surveys,questionnaires and interviews to summarize and analyze the current status and characteristics and main problems of local farmers'livelihood capitals on the basis of the data of 628 farmer samples.It proposes countermeasures for future development of farmers'livelihoods.Implementing these strategies will be helpful for improving the livelihoods capital structure of farmers'and enhancing their sustainable development capability.
文摘The editor regrets that they inadvertently pasted the wrong figure during the production stage.The correct Fig.7 should be as below:The editor would like to apologise for any inconvenience caused.
文摘Based on the site investigation of a lightning stroke accident in a coal mine in Weiyuan County during a strong thunderstorm process on the night of August 10,2024,combined with the investigation data of the accident site,the causes of the lightning stroke accident were analyzed,and the corresponding rectification suggestions were put forward.
文摘BACKGROUND Postmenopausal women with osteoporosis are at high risk of developing depre-ssive symptoms,necessitating specialized psychological nursing interventions.AIM To investigate factors influencing depressive symptoms in postmenopausal women with osteoporosis and develop targeted psychological nursing interven-tions.METHODS A total of 180 postmenopausal women with osteoporosis admitted to the Depar-tment of Orthopedics at the First Affiliated Hospital of Soochow University between October 2021 and October 2024 were selected as research participants.Information on age,duration of menopause,body mass index,education level,marital status,activity intensity,bone density,presence of chronic diseases,calcium supplement intake,sex hormone levels,and depressive symptoms were collected.The 24-item Hamilton Depression Scale was used for assessment.RESULTS Forty-eight patients had no depressive symptoms,and 132 patients had depre-ssive symptoms.Comprehensive univariate and multivariate logistic regression analyses showed that low bone density in the lumbar spine(L2-L4)and femoral neck,presence of chronic diseases,and low 5-hydroxytryptamine levels were independent risk factors for depressive symptoms,whereas calcium supplement intake and moderate to high-intensity activity were independent protective factors.CONCLUSION By implementing specialized psychological nursing interventions,and providing rehabilitation guidance,the incidence of depressive symptoms can be effectively reduced,improving the psychological health status and patient quality of life.
文摘Aim:To evaluate the impact of professional training on pediatric outpatient nurses’cognition and attitudes towards the use of clown therapy,and to assess its clinical applicability.Design:A pre-and post-training evaluation study.Methods:A total of 31 pediatric outpatient nurses participated in the study,completing a self-designed 15-item questionnaire focused on clown therapy.The questionnaires were administered both before and after a structured training program.The assessment aimed to measure changes in nurses’knowledge and attitudes toward clown therapy.Results:The results indicated a statistically significant improvement in the nurses’cognition following the training(mean score post-training:8.55 vs pre-training:7.71,p=0.003).Conclusion:Notably,the training also eliminated the age-related differences in cognition observed prior to the intervention.Furthermore,nurses expressed more positive attitudes toward the clinical implementation of clown therapy post-training.
基金financially supported by the National Natural Science Foundation of China(Nos.11904039,52125103,52071041,U21A2054 and 12104071)。
文摘SnS,a well-known van der Waals chalcogenide,is susceptible to oxidation in high-temperature or highhumidity environments,significantly impacting its functional performance and device stability.Conversely,oxidation can be used as an effective strategy for surface engineering,allowing for structure modulation or design,property tuning and application exploration.However,there is currently a gap in understanding the relationship between the oxidation behavior of SnS,the structure of its oxidized surface,and the dependence on oxidation temperature.In this study,we systematically investigated the evolution of SnS surfaces under thermal oxidation using electron microscopy.The microstructure evolution(e.g.,surface structures,phases,defects,and interface)of SnS during high-temperature oxidation has been fully characterized and studied based on cross-sectional samples.Various surface heterostructures were constructed,including SnO_(2)/SnS,SnO_(2)/SnS_(2)/SnS,and SnO_(2)/Sn_(2)S_(3)/SnS,offering significant potential for the surface functionalization of SnS-based systems.Accordingly,oxidation mechanisms at different stages were elucidated based on the detailed and clear picture of microstructures.This research not only deepens our understanding of the fundamental science of SnS oxidation but also provides valuable insights for preventing and developing surface oxidation engineering in SnS and other van der Waals chalcogenides/materials.
