Exploring zinc-free anode materials is one of the effective strategies to get the zinc dendrites problem of flexible zinc ion battery(ZIB)solved.In this work,an analogous heterostructure(AHS)is constructed from the ex...Exploring zinc-free anode materials is one of the effective strategies to get the zinc dendrites problem of flexible zinc ion battery(ZIB)solved.In this work,an analogous heterostructure(AHS)is constructed from the excellent MXene(Ti_(3)C_(2)T_(x))and TiSe_(2) nanosheets.The AHS not only possesses numerous diffu-sion paths and Zn^(2+)storage sites but also possesses a stable conductive network to accelerate charge transfer in the electrode.As a collaborative advantage,electrochemical measurement results show that MXene/TiSe_(2) electrodes display an excellent specific capacity of 177.9 mAh g^(-1) at 0.10 A g^(-1) and a long-term cycling stability of 77.4%capacity retention after 400 cycles.DFT computations further demon-strate the excellent performance of MXene/TiSe_(2) electrodes including desirable electronic conductivity and low Zn^(2+)migration barriers.The assembled flexible ZIB not only delivers a good specific capacity of 42.2μAh cm^(-2) at 0.20 mA cm^(-2) and a competitive energy density of 37.4μWh cm^(-2) but also exhibits excellent flexibility and thermostability.Furthermore,after 400 cycles at 0.60 A g^(-1),flexible ZIB shows a capacity retention of 73.8%.This work gives a successful attempt to design 2D layered materials as Zn metal-free anode for flexible ZIB.展开更多
Objective:Used extensively to treat cardiovascular disease,Danqi analogous formulas(DQAF)include prescriptions for Danqi(DQ),Fufang Danshen(FFDS)and Qishen Yiqi(QSYQ).Differences in prescription compatibility result i...Objective:Used extensively to treat cardiovascular disease,Danqi analogous formulas(DQAF)include prescriptions for Danqi(DQ),Fufang Danshen(FFDS)and Qishen Yiqi(QSYQ).Differences in prescription compatibility result in varying emphases of DQAF in clinical application.Methods and results:Based on network analysis in this study,common and distinct mechanisms of DQAF actions on cardiovascular disease were analyzed at a systemic level.Components etargetsepathways models were developed by Cytoscape(http://www.cytoscape.org/);whereby,target information for active compounds was obtained based on the PharmMapper database(http://59.78.96.61/pharmmapper/),which was further used to search pathways using the Kyoto Encyclopedia of Genes and Genomes database(http://www.genome.jp/kegg/).Based on target and network analyses,we discovered RBP4 is a potential common target of DQAF,while mitogen-activated protein kinase 1(MAPK1)and glutathione S-transferase P were potential targets of FFDS and QSYQ,respectively.Furthermore,the potential of DQAF to treat cardiovascular disease occurs through effects on the endocrine,immune,and digestive systems,in addition to lipid,sugar and amino acid metabolic pathways.Whereas FFDS exhibits effects on Toll-like receptor,transforming growth factor beta and MAPK signaling pathways;QSYQ exerts effects on cyclic adenosine monophosphate signaling,as well as metabolism of glutathione and arachidonic acid.展开更多
Transmitting quantum states by channels of analogous Bell states is studied in this paper. We analyze the transmitting process. constructed the probabilitic unitary operator, and gain the largest successful transfer q...Transmitting quantum states by channels of analogous Bell states is studied in this paper. We analyze the transmitting process. constructed the probabilitic unitary operator, and gain the largest successful transfer quantum state probability.展开更多
The main purpose of this paper is using the properties of the classical Gauss sum and the analytic methods to study the computational problem of one kind of hybrid power mean involving the character sum of polynomials...The main purpose of this paper is using the properties of the classical Gauss sum and the analytic methods to study the computational problem of one kind of hybrid power mean involving the character sum of polynomials and a sum analogous to Kloosterman sum mod p,an odd prime,and give two sharp asymptotic formulae for them.展开更多
In the DC microgrid,the lack of inertia and damping in power electronic converters results in poor stability of DC bus voltage and low inertia of the DC microgrid during fluctuations in load and photovoltaic power.To ...In the DC microgrid,the lack of inertia and damping in power electronic converters results in poor stability of DC bus voltage and low inertia of the DC microgrid during fluctuations in load and photovoltaic power.To address this issue,the application of a virtual synchronous generator(VSG)in grid-connected inverters control is referenced and proposes a control strategy called the analogous virtual synchronous generator(AVSG)control strategy for the interface DC/DC converter of the battery in the microgrid.Besides,a flexible parameter adaptive control method is introduced to further enhance the inertial behavior of the AVSG control.Firstly,a theoretical analysis is conducted on the various components of the DC microgrid,the structure of analogous virtual synchronous generator,and the control structure’s main parameters related to the DC microgrid’s inertial behavior.Secondly,the voltage change rate tracking coefficient is introduced to adjust the change of the virtual capacitance and damping coefficient flexibility,which further strengthens the inertia trend of the DC microgrid.Additionally,a small-signal modeling approach is used to analyze the approximate range of the AVSG’s main parameters ensuring system stability.Finally,conduct a simulation analysis by building the model of the DC microgrid system with photovoltaic(PV)and battery energy storage(BES)in MATLAB/Simulink.Simulation results from different scenarios have verified that the AVSG control introduces fixed inertia and damping into the droop control of the battery,resulting in a certain level of inertia enhancement.Furthermore,the additional adaptive control strategy built upon the AVSG control provides better and flexible inertial support for the DC microgrid,further enhances the stability of the DC bus voltage,and has a more positive impact on the battery performance.展开更多
Root Analogous Municipal Solid Waste System “RA-MSW” is a novel management system that manages waste, biogas, and leachate in bioreactor landfill. Different than conventional disposal at landfills, waste is penetrat...Root Analogous Municipal Solid Waste System “RA-MSW” is a novel management system that manages waste, biogas, and leachate in bioreactor landfill. Different than conventional disposal at landfills, waste is penetrated by synthetic roots that serve dual mission for biogas collection and leachate recirculation. RA-MSW roots are permeable hydropho- bic polymer material that are formed on-place or prefabricated at factory from recyclable material available on the dumping area. Since the material is hydrophobic, it does not contain water in the voids providing more space for gas transport and collection. The roots are also interchangeably used for leachate recirculation where the parameters of wa- ter content, nutrients, pH, and temperature are optimized to enhance biogas production simultaneously with leachate treatment. RA-MSW provides new approach of waste management and control;it has new virtues of landfill operation;new material medium for biogas collection;new biocell design configuration;new manipulation for leachate and biogas. The approach adds new merits for solid waste management, bio-energy utilization, and the concept of 5 R’s cycle for MSW management.展开更多
In this paper, the dynamical forming mechanism of analogous rhythm phenomenon is studied by using a coupled ocean-atmosphere model in form of analogous discrepance. The results show that the analogous rhythm is non-un...In this paper, the dynamical forming mechanism of analogous rhythm phenomenon is studied by using a coupled ocean-atmosphere model in form of analogous discrepance. The results show that the analogous rhythm is non-uniform oscillation of analogous discrepance disturbance which is caused by the nonlinear coupled interaction of ocean-air system and the seasonal variation of monthly mean circulation. Then, the numerical simulations and sensitivity studies are conducted by using a global coupled ocean-atmosphere dynamical-statistical seasonal long-range numerical prediction model, the results not only prove the result of theoretical analysis, but also provide the basis of making seasonal long-range numerical prediction by using this model.展开更多
In 1867, Crambrown supposed that correlation existed between the bioactivity of drugs and features of their chemical structures. Later, in 1900, overton found that the bioactivities of anaesthetic of different chemica...In 1867, Crambrown supposed that correlation existed between the bioactivity of drugs and features of their chemical structures. Later, in 1900, overton found that the bioactivities of anaesthetic of different chemical structures increased with the enlargement of their partition coefficients of oil-water. After the World War Ⅱ, the research on structure-activity relationship has been developed rapidly. In 1961, Hansch method was applied to the investigation of the analytic relationship between the bioactivities of the growth hormone of the plant and the effect of the substituents of their compounds.展开更多
Let P: C<sup>n</sup>→C<sup>n</sup> be an analogous polynomial system, where C<sup>n</sup> is the n-dimensional complex space. By an analogous polynomial system, we mean that each o...Let P: C<sup>n</sup>→C<sup>n</sup> be an analogous polynomial system, where C<sup>n</sup> is the n-dimensional complex space. By an analogous polynomial system, we mean that each of its components is a finite sum of terms aZ<sub>1</sub><sup>β</sup>1…Z<sub>n</sub><sup>β</sup>n, where a is a complex number, Z<sub>j</sub> a complex variable, and β<sub>j</sub> a nonnegative real number, j=1,…, n. For leach term in each component, consider the sum β<sub>1</sub>+…+β<sub>n</sub>. Let a<sub>j</sub> be the maximum展开更多
Ⅰ. INTRODUCTION With the development of studies on biological nitrogen fixation, the investigation on the micro-circumstances of active centers in metalloenzyme has reached the
We propose a method to generate specially shaped high-order singular beams of pre-designed intensity distributions. Such a method does not a priori assume a phase formula, but rather relies on the 'cake-cutting an...We propose a method to generate specially shaped high-order singular beams of pre-designed intensity distributions. Such a method does not a priori assume a phase formula, but rather relies on the 'cake-cutting and assembly' approach to achieve the azimuthal phase gradient for beam shaping, inspired by the orbital motion trajectory change of an artificial satellite. Based on our method, several typical vortex beams with desired intensity patterns are experimentally generated. As an example, we realize optical trapping and transportation of microorganisms with a triangle-shaped vortex beam, demonstrating the applicability of such unconventional vortex beams in optical trapping and manipulation.展开更多
In recent years, the investigation of biological nitrogen fixation and analogy to biological nitrogen fixation are a very active field and the researches for micro-surroundings of active centre in metalloenzyme have r...In recent years, the investigation of biological nitrogen fixation and analogy to biological nitrogen fixation are a very active field and the researches for micro-surroundings of active centre in metalloenzyme have reached atomic level at home and abroad. It is known from the results of research of Fe-Mo-S clusters synthesized that FeS2Mo four-element ring formed by MOS4-2展开更多
Electron spin resonance (ESR) technique has been widely used as a modern biophysicalmethod in every field of life science. Spin probe method is a special ESR technique. Inorder to extend the biological application of ...Electron spin resonance (ESR) technique has been widely used as a modern biophysicalmethod in every field of life science. Spin probe method is a special ESR technique. Inorder to extend the biological application of the spin probe method.a nitroxide radicalanalogous to imidazole F was synthesized:展开更多
In the physical model test of landslides,the selection of analogous materials is the key,and it is difficult to consider the similarity of mechanical properties and seepage performance at the same time.To develop a mo...In the physical model test of landslides,the selection of analogous materials is the key,and it is difficult to consider the similarity of mechanical properties and seepage performance at the same time.To develop a model material suitable for analysing the deformation and failure of reservoir landslides,based on the existing research foundation of analogous materials,5 materials and 5 physical-mechanical parameters were selected to design an orthogonal test.The factor sensitivity of each component ratio and its influence on the physical-mechanical indices were studied by range analysis and stepwise regression analysis,and the proportioning method was determined.Finally,the model material was developed,and a model test was carried out considering Huangtupo as the prototype application.The results showed that(1)the model material composed of sand,barite powder,glass beads,clay,and bentonite had a wide distribution of physical-mechanical parameters,which could be applied to model tests under different conditions;(2)the physical-mechanical parameters of analogous materials matched the application prototype;and(3)the mechanical properties and seepage performance of the model material sample met the requirements of reservoir landslide model tests,which could be used to simulate landslide evolution and analyse the deformation process.展开更多
The application of legal texts in the context of digital television is a process that relies on several normative instruments,ranging from international treaties,such as those of the ITU(International Telecommunicatio...The application of legal texts in the context of digital television is a process that relies on several normative instruments,ranging from international treaties,such as those of the ITU(International Telecommunications Union),to national regulations defining the obligations of audiovisual operators and the modalities of consumer support.Many countries have introduced specific laws and regulations to organize the gradual switch-off of analog broadcasting and encourage the adoption of new digital standards.Consequently,the digitization of Guinea’s broadcasting network cannot be carried out without taking into account the legal framework:allocation of resources and broadcasting players.Analog and digital broadcasting,according to regulatory texts,shows the relationships between the different communication management structures.As for digital broadcasting,we note the appearance of a new service,multiplex.展开更多
The removal of cesium-137(^(137)Cs)from nuclear wastewater remains crucial due to its radioactivity and high solubility in water,which pose serious risk to human health and the environment.Aiming at selective capture ...The removal of cesium-137(^(137)Cs)from nuclear wastewater remains crucial due to its radioactivity and high solubility in water,which pose serious risk to human health and the environment.Aiming at selective capture of Cs^(+) from wastewater,a core-shell adsorbent,Prussian blue analog@y-alumina(PBA@Al_(2)O_(3))pellets were synthesized using the hydrothermal-stepwise deposition method.The coreshell PBA@Al_(2)O_(3)pellets showcased a PBA loading of 25%and demonstrated a maximum adsorption capacity of 15.65 mg·g^(-1).The adsorption data was consistent with the pseudo-second-order kinetic model and the Langmuir isotherm model.It effectively reduced bulk Cs^(+) concentrations from an initial 6.62 mg·L^(-1)to 2 μg·L^(-1),achieving a removal efficiency of 99.97%and distribution coefficient(Kd)of 1.265×10^(6)ml·g^(-1),surpassing the performance of other PBA-based materials.The material also indicated good mechanical properties and cesium ion removal rates of 99.7%across a wide pH range(1.82 to 11.12).Furthermore,PBA@Al_(2)O_(3)exhibited consistent removal rate of over 99%and good selectivity(SF=50-1600)towards Cs^(+) even in the presence of interfering ions such as Na^(+),K^(+),Mg^(2+),and Ca^(2+)ions.The Kd(Cs^(+))for PBA@Al2O3 in simulated seawater and groundwater were 9.92×10^(3)and 2.23×10^(4)ml·g^(-1),where the removal rates reached 96.1%and 98.2%,respectively.XPS confirms that the adsorption mechanism is the ion exchange between Cs^(+) and K^(+)ions.This study underscores the significant potential of inorganic core-shell pellets adsorbents as promising agents for the selective capture of Cs^(+) from wastewater.展开更多
BACKGROUND Currently,colonoscopy still needs continuous optimization and exploration of novel alternative approaches to enhance the experience of patients during co-lonoscopy.AIM To analyze the efficacy of water infus...BACKGROUND Currently,colonoscopy still needs continuous optimization and exploration of novel alternative approaches to enhance the experience of patients during co-lonoscopy.AIM To analyze the efficacy of water infusion combined with defoamers in colono-scopy.METHODS This study included 97 patients undergoing colonoscopy from January 2024 to June 2024.The participants were categorized into two groups,namely,the control group(n=47),who underwent conventional colonoscopy,and the experimental group(n=50),who received colonoscopy using water injection combined with defoamers.A comparative analysis was then conducted on the disease detection rate(colonic polyps,colonorrhagia,colonic ulcers,colonic mucosal lesions,and others),colonoscopy duration,abdominal pain[visual analog scale(VAS)],Boston bowel preparation scale(BBPS),self-rating anxiety scale(SAS),bowel preparation comfort,complications(intestinal perforation,bleeding,nausea and vomiting,abdominal pain,and abdominal distension),and patient satisfaction.RESULTS The experimental group demonstrated a significantly higher total disease detection rate,BBPS scores,and patient satisfaction compared with the control group.Further,the research group exhibited shorter colonoscopy duration,lower VAS and SAS scores and total complication rate,and better patient comfort and satisfaction.CONCLUSION These results indicate that the combination of water injection and defoamers exhibited an overall better therapeutic effect than conventional colonoscopy,mainly reflected in higher disease detection rate,faster examination ef-ficiency,lower abdominal pain,anxiety,and complication incidences,and significantly better bowel preparation,comfort,and patient satisfaction.展开更多
Phase reconstruction plays a pivotal role in biology, medical imaging, and wavefront sensing. However, multiple measurements and adjustments are usually required for conventional schemes, which inevitably reduces the ...Phase reconstruction plays a pivotal role in biology, medical imaging, and wavefront sensing. However, multiple measurements and adjustments are usually required for conventional schemes, which inevitably reduces the quality of phase imaging. Here, based on multi-channel metasurface and quantum entanglement source, a simple and integrated quantum analog operation system is proposed to realize quantitative phase reconstruction with a high signal-to-noise ratio (SNR) under a low signal photon level. Without additional measurements and adjustments, four differential images necessary for the phase reconstruction are captured simultaneously. The non-local correlation of entangled photon pairs enables to remotely manipulate working modes of the system. Besides, the consistency of entangled photon pairs in time domain makes it possible to achieve a high SNR imaging by trigger detection. The results may potentially empower the application of metasurfaces in optical chip, wave function reconstruction, and label-free biology imaging.展开更多
基金supported by the National Natural Science Foundation of China (Nos.12004002 and 12274151)Anhui Provincial Natural Science Foundation (No.1908085QF251)Foundation for Introduction of High-Level Talents of Anhui University (No.S020118002/061).
文摘Exploring zinc-free anode materials is one of the effective strategies to get the zinc dendrites problem of flexible zinc ion battery(ZIB)solved.In this work,an analogous heterostructure(AHS)is constructed from the excellent MXene(Ti_(3)C_(2)T_(x))and TiSe_(2) nanosheets.The AHS not only possesses numerous diffu-sion paths and Zn^(2+)storage sites but also possesses a stable conductive network to accelerate charge transfer in the electrode.As a collaborative advantage,electrochemical measurement results show that MXene/TiSe_(2) electrodes display an excellent specific capacity of 177.9 mAh g^(-1) at 0.10 A g^(-1) and a long-term cycling stability of 77.4%capacity retention after 400 cycles.DFT computations further demon-strate the excellent performance of MXene/TiSe_(2) electrodes including desirable electronic conductivity and low Zn^(2+)migration barriers.The assembled flexible ZIB not only delivers a good specific capacity of 42.2μAh cm^(-2) at 0.20 mA cm^(-2) and a competitive energy density of 37.4μWh cm^(-2) but also exhibits excellent flexibility and thermostability.Furthermore,after 400 cycles at 0.60 A g^(-1),flexible ZIB shows a capacity retention of 73.8%.This work gives a successful attempt to design 2D layered materials as Zn metal-free anode for flexible ZIB.
基金support of this work by the National Natural Science Foundation of China(No.81430094 and 81173522)the National Key Technology R&D Program(2008BAI51B01).
文摘Objective:Used extensively to treat cardiovascular disease,Danqi analogous formulas(DQAF)include prescriptions for Danqi(DQ),Fufang Danshen(FFDS)and Qishen Yiqi(QSYQ).Differences in prescription compatibility result in varying emphases of DQAF in clinical application.Methods and results:Based on network analysis in this study,common and distinct mechanisms of DQAF actions on cardiovascular disease were analyzed at a systemic level.Components etargetsepathways models were developed by Cytoscape(http://www.cytoscape.org/);whereby,target information for active compounds was obtained based on the PharmMapper database(http://59.78.96.61/pharmmapper/),which was further used to search pathways using the Kyoto Encyclopedia of Genes and Genomes database(http://www.genome.jp/kegg/).Based on target and network analyses,we discovered RBP4 is a potential common target of DQAF,while mitogen-activated protein kinase 1(MAPK1)and glutathione S-transferase P were potential targets of FFDS and QSYQ,respectively.Furthermore,the potential of DQAF to treat cardiovascular disease occurs through effects on the endocrine,immune,and digestive systems,in addition to lipid,sugar and amino acid metabolic pathways.Whereas FFDS exhibits effects on Toll-like receptor,transforming growth factor beta and MAPK signaling pathways;QSYQ exerts effects on cyclic adenosine monophosphate signaling,as well as metabolism of glutathione and arachidonic acid.
基金National Natural Science Foundation of China under Grant No.10575017
文摘Transmitting quantum states by channels of analogous Bell states is studied in this paper. We analyze the transmitting process. constructed the probabilitic unitary operator, and gain the largest successful transfer quantum state probability.
基金Supported by NSFC(No.12126357)Natural Science Basic Research Plan in Shaanxi Province of China(No.2023-JC-QN-0058)。
文摘The main purpose of this paper is using the properties of the classical Gauss sum and the analytic methods to study the computational problem of one kind of hybrid power mean involving the character sum of polynomials and a sum analogous to Kloosterman sum mod p,an odd prime,and give two sharp asymptotic formulae for them.
基金funded by the National Natural Science Foundation of China(52067013),and the Provincial Natural Science Foundation of Gansu(20JR5RA395).
文摘In the DC microgrid,the lack of inertia and damping in power electronic converters results in poor stability of DC bus voltage and low inertia of the DC microgrid during fluctuations in load and photovoltaic power.To address this issue,the application of a virtual synchronous generator(VSG)in grid-connected inverters control is referenced and proposes a control strategy called the analogous virtual synchronous generator(AVSG)control strategy for the interface DC/DC converter of the battery in the microgrid.Besides,a flexible parameter adaptive control method is introduced to further enhance the inertial behavior of the AVSG control.Firstly,a theoretical analysis is conducted on the various components of the DC microgrid,the structure of analogous virtual synchronous generator,and the control structure’s main parameters related to the DC microgrid’s inertial behavior.Secondly,the voltage change rate tracking coefficient is introduced to adjust the change of the virtual capacitance and damping coefficient flexibility,which further strengthens the inertia trend of the DC microgrid.Additionally,a small-signal modeling approach is used to analyze the approximate range of the AVSG’s main parameters ensuring system stability.Finally,conduct a simulation analysis by building the model of the DC microgrid system with photovoltaic(PV)and battery energy storage(BES)in MATLAB/Simulink.Simulation results from different scenarios have verified that the AVSG control introduces fixed inertia and damping into the droop control of the battery,resulting in a certain level of inertia enhancement.Furthermore,the additional adaptive control strategy built upon the AVSG control provides better and flexible inertial support for the DC microgrid,further enhances the stability of the DC bus voltage,and has a more positive impact on the battery performance.
文摘Root Analogous Municipal Solid Waste System “RA-MSW” is a novel management system that manages waste, biogas, and leachate in bioreactor landfill. Different than conventional disposal at landfills, waste is penetrated by synthetic roots that serve dual mission for biogas collection and leachate recirculation. RA-MSW roots are permeable hydropho- bic polymer material that are formed on-place or prefabricated at factory from recyclable material available on the dumping area. Since the material is hydrophobic, it does not contain water in the voids providing more space for gas transport and collection. The roots are also interchangeably used for leachate recirculation where the parameters of wa- ter content, nutrients, pH, and temperature are optimized to enhance biogas production simultaneously with leachate treatment. RA-MSW provides new approach of waste management and control;it has new virtues of landfill operation;new material medium for biogas collection;new biocell design configuration;new manipulation for leachate and biogas. The approach adds new merits for solid waste management, bio-energy utilization, and the concept of 5 R’s cycle for MSW management.
基金This research was supported by the Doctor Station Funds of National Education Committee 32860410.
文摘In this paper, the dynamical forming mechanism of analogous rhythm phenomenon is studied by using a coupled ocean-atmosphere model in form of analogous discrepance. The results show that the analogous rhythm is non-uniform oscillation of analogous discrepance disturbance which is caused by the nonlinear coupled interaction of ocean-air system and the seasonal variation of monthly mean circulation. Then, the numerical simulations and sensitivity studies are conducted by using a global coupled ocean-atmosphere dynamical-statistical seasonal long-range numerical prediction model, the results not only prove the result of theoretical analysis, but also provide the basis of making seasonal long-range numerical prediction by using this model.
文摘In 1867, Crambrown supposed that correlation existed between the bioactivity of drugs and features of their chemical structures. Later, in 1900, overton found that the bioactivities of anaesthetic of different chemical structures increased with the enlargement of their partition coefficients of oil-water. After the World War Ⅱ, the research on structure-activity relationship has been developed rapidly. In 1961, Hansch method was applied to the investigation of the analytic relationship between the bioactivities of the growth hormone of the plant and the effect of the substituents of their compounds.
文摘Let P: C<sup>n</sup>→C<sup>n</sup> be an analogous polynomial system, where C<sup>n</sup> is the n-dimensional complex space. By an analogous polynomial system, we mean that each of its components is a finite sum of terms aZ<sub>1</sub><sup>β</sup>1…Z<sub>n</sub><sup>β</sup>n, where a is a complex number, Z<sub>j</sub> a complex variable, and β<sub>j</sub> a nonnegative real number, j=1,…, n. For leach term in each component, consider the sum β<sub>1</sub>+…+β<sub>n</sub>. Let a<sub>j</sub> be the maximum
文摘Ⅰ. INTRODUCTION With the development of studies on biological nitrogen fixation, the investigation on the micro-circumstances of active centers in metalloenzyme has reached the
基金National Key R&D Program of China(2017YFA0303800)National Natural Science Foundation of China(11674180,91750204)+1 种基金PCSIRT(IRT_13R29)Higher Education Discipline Innovation Project(B07013)
文摘We propose a method to generate specially shaped high-order singular beams of pre-designed intensity distributions. Such a method does not a priori assume a phase formula, but rather relies on the 'cake-cutting and assembly' approach to achieve the azimuthal phase gradient for beam shaping, inspired by the orbital motion trajectory change of an artificial satellite. Based on our method, several typical vortex beams with desired intensity patterns are experimentally generated. As an example, we realize optical trapping and transportation of microorganisms with a triangle-shaped vortex beam, demonstrating the applicability of such unconventional vortex beams in optical trapping and manipulation.
文摘In recent years, the investigation of biological nitrogen fixation and analogy to biological nitrogen fixation are a very active field and the researches for micro-surroundings of active centre in metalloenzyme have reached atomic level at home and abroad. It is known from the results of research of Fe-Mo-S clusters synthesized that FeS2Mo four-element ring formed by MOS4-2
基金Project supported by the National Natural Science Foundation of China.
文摘Electron spin resonance (ESR) technique has been widely used as a modern biophysicalmethod in every field of life science. Spin probe method is a special ESR technique. Inorder to extend the biological application of the spin probe method.a nitroxide radicalanalogous to imidazole F was synthesized:
基金supported by the Major Program of the National Natural Science Foundation of China(No.42090054)the National Key Scientific Instrument and Equipment Development Projects of China(No.41827808)+1 种基金the Major Program of the National Natural Science Foundation of China(No.42090055)the National Science Foundation of China(No.42107194)。
文摘In the physical model test of landslides,the selection of analogous materials is the key,and it is difficult to consider the similarity of mechanical properties and seepage performance at the same time.To develop a model material suitable for analysing the deformation and failure of reservoir landslides,based on the existing research foundation of analogous materials,5 materials and 5 physical-mechanical parameters were selected to design an orthogonal test.The factor sensitivity of each component ratio and its influence on the physical-mechanical indices were studied by range analysis and stepwise regression analysis,and the proportioning method was determined.Finally,the model material was developed,and a model test was carried out considering Huangtupo as the prototype application.The results showed that(1)the model material composed of sand,barite powder,glass beads,clay,and bentonite had a wide distribution of physical-mechanical parameters,which could be applied to model tests under different conditions;(2)the physical-mechanical parameters of analogous materials matched the application prototype;and(3)the mechanical properties and seepage performance of the model material sample met the requirements of reservoir landslide model tests,which could be used to simulate landslide evolution and analyse the deformation process.
文摘The application of legal texts in the context of digital television is a process that relies on several normative instruments,ranging from international treaties,such as those of the ITU(International Telecommunications Union),to national regulations defining the obligations of audiovisual operators and the modalities of consumer support.Many countries have introduced specific laws and regulations to organize the gradual switch-off of analog broadcasting and encourage the adoption of new digital standards.Consequently,the digitization of Guinea’s broadcasting network cannot be carried out without taking into account the legal framework:allocation of resources and broadcasting players.Analog and digital broadcasting,according to regulatory texts,shows the relationships between the different communication management structures.As for digital broadcasting,we note the appearance of a new service,multiplex.
基金supported by the Key Reasearch and Development Program of Zhejiang(2022C01029)the National Natural Science Foundation of China(22225802 and 22288102)the Research Funds of Institute of Zhejiang University-Quzhou(IZQ2022KJ3005).
文摘The removal of cesium-137(^(137)Cs)from nuclear wastewater remains crucial due to its radioactivity and high solubility in water,which pose serious risk to human health and the environment.Aiming at selective capture of Cs^(+) from wastewater,a core-shell adsorbent,Prussian blue analog@y-alumina(PBA@Al_(2)O_(3))pellets were synthesized using the hydrothermal-stepwise deposition method.The coreshell PBA@Al_(2)O_(3)pellets showcased a PBA loading of 25%and demonstrated a maximum adsorption capacity of 15.65 mg·g^(-1).The adsorption data was consistent with the pseudo-second-order kinetic model and the Langmuir isotherm model.It effectively reduced bulk Cs^(+) concentrations from an initial 6.62 mg·L^(-1)to 2 μg·L^(-1),achieving a removal efficiency of 99.97%and distribution coefficient(Kd)of 1.265×10^(6)ml·g^(-1),surpassing the performance of other PBA-based materials.The material also indicated good mechanical properties and cesium ion removal rates of 99.7%across a wide pH range(1.82 to 11.12).Furthermore,PBA@Al_(2)O_(3)exhibited consistent removal rate of over 99%and good selectivity(SF=50-1600)towards Cs^(+) even in the presence of interfering ions such as Na^(+),K^(+),Mg^(2+),and Ca^(2+)ions.The Kd(Cs^(+))for PBA@Al2O3 in simulated seawater and groundwater were 9.92×10^(3)and 2.23×10^(4)ml·g^(-1),where the removal rates reached 96.1%and 98.2%,respectively.XPS confirms that the adsorption mechanism is the ion exchange between Cs^(+) and K^(+)ions.This study underscores the significant potential of inorganic core-shell pellets adsorbents as promising agents for the selective capture of Cs^(+) from wastewater.
基金Supported by Foshan City Self-Raised Funds Science and Technology Innovation Project,No.2320001007369.
文摘BACKGROUND Currently,colonoscopy still needs continuous optimization and exploration of novel alternative approaches to enhance the experience of patients during co-lonoscopy.AIM To analyze the efficacy of water infusion combined with defoamers in colono-scopy.METHODS This study included 97 patients undergoing colonoscopy from January 2024 to June 2024.The participants were categorized into two groups,namely,the control group(n=47),who underwent conventional colonoscopy,and the experimental group(n=50),who received colonoscopy using water injection combined with defoamers.A comparative analysis was then conducted on the disease detection rate(colonic polyps,colonorrhagia,colonic ulcers,colonic mucosal lesions,and others),colonoscopy duration,abdominal pain[visual analog scale(VAS)],Boston bowel preparation scale(BBPS),self-rating anxiety scale(SAS),bowel preparation comfort,complications(intestinal perforation,bleeding,nausea and vomiting,abdominal pain,and abdominal distension),and patient satisfaction.RESULTS The experimental group demonstrated a significantly higher total disease detection rate,BBPS scores,and patient satisfaction compared with the control group.Further,the research group exhibited shorter colonoscopy duration,lower VAS and SAS scores and total complication rate,and better patient comfort and satisfaction.CONCLUSION These results indicate that the combination of water injection and defoamers exhibited an overall better therapeutic effect than conventional colonoscopy,mainly reflected in higher disease detection rate,faster examination ef-ficiency,lower abdominal pain,anxiety,and complication incidences,and significantly better bowel preparation,comfort,and patient satisfaction.
基金supported by the National Natural Science Foundation of China(Grants No.62221002,Grants No.12174097).
文摘Phase reconstruction plays a pivotal role in biology, medical imaging, and wavefront sensing. However, multiple measurements and adjustments are usually required for conventional schemes, which inevitably reduces the quality of phase imaging. Here, based on multi-channel metasurface and quantum entanglement source, a simple and integrated quantum analog operation system is proposed to realize quantitative phase reconstruction with a high signal-to-noise ratio (SNR) under a low signal photon level. Without additional measurements and adjustments, four differential images necessary for the phase reconstruction are captured simultaneously. The non-local correlation of entangled photon pairs enables to remotely manipulate working modes of the system. Besides, the consistency of entangled photon pairs in time domain makes it possible to achieve a high SNR imaging by trigger detection. The results may potentially empower the application of metasurfaces in optical chip, wave function reconstruction, and label-free biology imaging.
