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Bi/3DPG composite structure optimization realizes high specific capacity and rapid sodium-ion storage

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Frontiers of Materials Science 2022年第2期16卷 131-141页

作者： Senrong QIAO Huijun LI Xiaoqin cheng Dongyu BIAN Xiaomin WANG College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

As an anode material for sodium-ion batteries(SIBs),bismuth(Bi)has attracted widespread attention due to its suitable voltage platform and high volumetric energy ***,the severe volume expansion of Bi during charging and discharging leads to a rapid decline in battery *** Bi on the graphene can relieve volume expansion and improve electrochemical ***,excessive loading of Bi on graphene will cause the porosity of the composite material to decrease,which leads to a decrease of the Na+transmission ***,the Bi/three-dimensional porous graphene(Bi/3DPG)composite material was prepared and the pore structure was optimized to obtain the medium-load Bi/3DPG(Bi/3DPG-M)with better electrochemical ***/3DPG-M exhibited a fast kinetic process while maintaining a high specific *** specific capacity still remained at 270 mA·h·g^(−1)(93.3%)after 500 cycles at a current density of 0.1 A·g^(−1).Even at 5 A·g^(−1),the specific capacity of Bi/3DPG-M could still reach 266.1 mA·h·g^(−1).This work can provide a reference for research on the use of alloy–graphene composite in the anode of SIBs.

关键词： sodium-ion battery microemulsion method bismuth graphene pore structure

维普期刊数据库

Review of Logistics Networks Structure Based on Complex Networks 36

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Review of Logistics Networks Structure Based on Complex Netw...

Civil Aircraft Assisted Space-Air-Ground Integrated Networks: Architecture Design and Coverage Analysis

第36届中国控制会议

作者： Yaoqun Xu Lin cheng Institute of System Engineering Harbin University of Commerce School of Management Harbin University of Commerce

ISBN: (纸本)9781538629185

With the development of economy,logistics becomes more and more *** efficiency depends on the structure of logistics *** paper briefly review the studies about complex networks from perspectives of statistical properties,structural models and application *** networks and complex networks have same behavior pattern,so we can apply the theories of complex networks to the research of logistics *** can analyze the internal mechanism of logistics networks with complex *** can study the relationship between local interaction of logistics network nodes and robustness of networks,adaptability of networks,global evolution.

关键词： complex networks logistics networks network nodes

来源： cnki会议评论

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China Communications 2022年第1期19卷 29-39页

作者： Shuxun Li Qian Chen Zhe Li Weixiao Meng cheng Li School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150001China Research and Development Department China Academy of Launch Vehicle TechnologyBeijing 100076China Faculty of Engineering and Applied Science Memorial University of NewfoundlandSt.Johns A1C5S7Canada

In this paper, we propose a novel AIenabled space-air-ground integrated networks(SAGIN). This new integrated networks architecture consists of LEO satellites and civil aircrafts carrying aerial base stations, called "civil aircraft assisted SAGIN(CAA-SAGIN)". The assistance of civil aircrafts can reduce the stress of satellite networks, improve the performance of SAGIN, decrease the construction cost and save space resources. Taking the Chinese mainland as an example, this paper has analyzed the distribution of civil aircrafts, and obtained the coverage characteristics of civil aircraft assisted networks(CAAN). Taking Starlink as the benchmark, this paper has calculated the service gap of CAAN, and designed the joint coverage constellation. The simulation results prove that the number of satellites in CAASAGIN can be greatly reduced with the assistance of civil aircrafts at the same data rate.

关键词： AI-enabled space-air-ground integrated networks civil aircraft assisted networks satellite constellation design joint coverage analysis

维普期刊数据库

Small tracking error correction for moving targets of intelligent electro-optical detection systems

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Frontiers of Mechanical Engineering 2024年第2期19卷 29-44页

作者： cheng SHEN Zhijie WEN Wenliang ZHU Dapeng FAN Mingyuan LING College of Intelligence Science and Technology National University of Defense TechnologyChangsha 410073China

Small tracking error correction for electro-optical systems is essential to improve the tracking precision of future mechanical and defense *** threats,such as“low,slow,and small(LSS)”moving targets,pose increasing challenges to *** core goal of this work is to address the issues,such as small tracking error correction and aiming control,of electro-optical detection systems by using mechatronics drive modeling,composite velocity–image stability control,and improved interpolation filter design.A tracking controller delay prediction method for moving targets is proposed based on the Euler transformation model of a two-axis,two-gimbal cantilever beam coaxial *** tracking error formation is analyzed in detail to reveal the scientific mechanism of composite control between the tracking controller’s feedback and the motor’s velocity–stability *** improved segmental interpolation filtering algorithm is established by combining line of sight(LOS)position correction and multivariable typical tracking fault ***,a platform with 2 degrees of freedom is used to test the *** LSS moving target shooting object with a tracking distance of S=100 m,target board area of A=1 m^(2),and target linear velocity of v=5 m/s is *** show that the optimal method’s distribution probability of the tracking error in a circle with a radius of 1 mrad is 66.7%,and that of the traditional method is 41.6%.Compared with the LOS shooting accuracy of the traditional method,the LOS shooting accuracy of the optimized method is improved by 37.6%.

关键词： electro-optical detection system small tracking error moving target visual servo aiming contro

The grapevine kinome:annotation,classification and expression patterns in developmental processes and stress responses

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Horticulture Research 2018年第1期5卷 682-697页

作者： Kaikai Zhu Xiaolong Wang Jinyi Liu Jun Tang Qunkang cheng Jin-Gui Chen Zong-Ming(Max)cheng College of Horticulture Nanjing Agricultural UniversityNanjingJiangsu210095China Department of Plant Sciences University of TennesseeKnoxvilleTN37996USA Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement Institute of HorticultureJiangsu Academy of Agricultural SciencesNanjingJiangsu210014China Department of Entomology and Plant Pathology University of TennesseeKnoxvilleTN37996USA Biosciences Division Oak Ridge National LaboratoryOak RidgeTN37831USA

Protein kinases(PKs)have evolved as the largest family of molecular switches that regulate protein activities associated with almost all essential cellular *** a fraction of plant PKs,however,have been functionally characterized even in model plant *** the present study,the entire grapevine kinome was identified and annotated using the most recent version of the grapevine genome.A total of 1168 PK-encoding genes were identified and classified into 20 groups and 121 families,with the RLK-Pelle group being the largest,with 872 *** 1168 kinase genes were unevenly distributed over all 19 chromosomes,and both tandem and segmental duplications contributed to the expansion of the grapevine kinome,especially of the RLK-Pelle ***/Ks values indicated that most of the tandem and segmental duplication events were under purifying *** grapevine kinome families exhibited different expression patterns during plant development and in response to various stress treatments,with many being *** comprehensive annotation of grapevine kinase genes,their patterns of expression and coexpression,and the related information facilitate a more complete understanding of the roles of various grapevine kinases in growth and development,responses to abiotic stress,and evolutionary history.

关键词： stress grape treatment

Factors influencing comfort level in head and neck neoplasm patients receiving radiotherapy

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International Journal of Nursing Sciences 2014年第4期1卷 394-399页

作者： Fang cheng Wei Wang Department of Nursing Electric Power Teaching HospitalCapital Medical UniversityBeijingChina Department of Nursing Education Center The First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhouChina

Objective:To determine factors that influence comfort in head and neck neoplasm patients receiving ***:In total,200 head and neck neoplasm patients receiving radiotherapy were recruited from three tertiary first class *** were assessed by Radiotherapy Comfort Questionnaire for patients with head and neck neoplasm,Social Support Scale,and Medical Coping Modes ***:The total score of comfort was 60.54±*** linear regression analysis indicated that number of radiation treatments,family accompaniment,educational level,resignation coping mode,complications due to diabetes,accompanying chemotherapy,and the utilization of social support significantly influenced comfort level(p<0.05).Among these,number of radiation treatments,complications due to diabetes,accompanying chemotherapy,and resignation coping were negative ***:Encouraging utilization of social support systems and a positive coping mode is important for increasing comfort level in head and neck neoplasm patients during *** should pay particular attention to those patients during later stages of radiotherapy or chemotherapy,with diabetes,without family accompaniment,and with lower education level.

关键词： Adaptation Comfort Head and neck neoplasms Psychological Radiotherapy

Multi-criteria comparative analysis of the pressure drop on coal gangue fly-ash slurry at different parts along an L-shaped pipeline

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International Journal of Coal Science & Technology 2023年第2期10卷 129-145页

作者： Defeng Wang Dengwu Jiao Zhanbo cheng Qingwen Shi Helmut Mischo Department for Underground Mining Methods Institute of Mining and Special Civil EngineeringTechnical University of Bergakademie FreibergFuchsmühlenweg 909599 Freiberg Dresden GermanyDepartment of Structural Engineering and Building MaterialsFaculty of Engineering and ArchitectureGhent University9052 ZwijnaardeBelgium School of Engineering University of WarwickCoventry CV47ALUK Department of Engineering West Virginia UniversityMorgantown 26505USA

Disposing of coal gangue and fly-ash on the surface is a risky method with tremendous potential catastrophic consequences for the *** mining is a promising practice for turning those hazardous wastes into functional backfill ***,how to efficiently deliver the slurry to the desired places remains *** address this issue,the computational fluid dynamics software Fluent was used in the current study in addition to a laboratory rheological test to simulate the impact of various parameters on the evolution of pressure at a particular section of the ***,the response surface method was employed to investigate how the various components and their corresponding influencing weights interact to affect the pressure *** study demonstrates that the pressure drop of the slurry is highly influenced by slurry concentration,speed,and pipe *** conveying speed is the main component in the bend section,pipe diameter takes over in the horizontal and vertical pipe sections.

关键词： Coal gangue slurry Pressure drop Numerical simulation Response surface analysis

Ensemble projections of climate and streamflow in a typical basin of semi-arid steppes in Mongolian Plateau of 2021-2100

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Advances in Climate Change Research 2024年第2期15卷 230-243页

作者： Hang PAN Jian-Ping TANG Liang cheng Man-Chun LI Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology Nanjing UniversityNanjing 210023China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China Key Laboratory of Mesoscale Severe Weather/Ministry of Education Nanjing UniversityNanjing 210023China School of Atmospheric Sciences Nanjing UniversityNanjing 210023China

The Kherlen River is the main water source for Hulun Lake,the largest lake in northern *** to reduced inflow from the Kherlen River,Hulun Lake experienced rapid shrinkage at the beginning of the 21st century,posing a serious threat to the ecological security of northern ***,there is still a significant lack of projections regarding future climate change and its hydrological response in the Kherlen River *** study analyzed the projected climate and streamflow changes in the Kherlen River basin,a vital yet vulnerable international semi-arid steppes type basin.A combination of multi-model ensemble projection techniques,and the soil and water assessment tool(SWAT)model was employed to examine the spatio-temporal changes in precipitation,temperature,streamflow,and the associated uncertainties in the *** temperature(an increase of 1.84-6.42℃)and the precipitation(an increase of 15.0-46.0 mm)of Kherlen River basin are projected to increase by 2100,leading to a rise in streamflow(1.08-4.78 m^(3) s^(-1)).The upstream of the Kherlen River exhibits remarkable increasing trends in precipitation,which has a dominant influence on streamflow of Kherlen *** increases in streamflow are observed in April,August,September,and October compared to the reference period(1971-2000).These findings suggest a partial alleviation of water scarcity in the Kherlen River,but also an increased likelihood of hydrological extreme *** projected temperature increase in the Kherlen River basin exhibits the smallest uncertainty,while more pronounced uncertainties are found in precipitation and *** spread among the results of CMIP6 models is greater than that of CMIP5 models,with lower signal-to-noise ratio(SNR)values for temperature,precipitation,and streamflow.

关键词： Climate change Flow projection Uncertainty SWAT Mongolian Plateau

How Much is the Consumption Potential of Citizenized Migrants?——Based on the Estimation of Migrants' Income Elasticity of Demand in the New Era of China

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Chinese Journal of Urban and Environmental Studies 2020年第2期8卷 59-81页

作者： cheng Jie YIN Xi Institute of Population and Labor Economics Chinese Academy of Social Sciences

The economic development and urbanization in China have stepped into a new stage, and the style of migrants’ consumption has changed. We use nationally representative data from China Migrants Dynamic Survey(2010–2017) for the evaluation of migrants’ income elasticity of demand and data from Urban Household Survey for that of local citizens in the new era of *** results show the following:(1) Migrants’ income elasticity of demand has reached 0.67 since the new era, presenting a sharply rising trend. In 2017, this number rose to 0.72, indicating that the overall consumption behavior of migrants tended to be localized.(2) Compared with the average consumption elasticity of local citizens(around 0.8), migrants’ income elasticity of demand was low, and still had room for improvement.(3) Citizenized migrants play a significant role in stimulating consumption. As estimated with consumption function, if citizenized migrants’ income elasticity of demand converges with that of local citizens, the total consumption will reach15.8 trillion in 2030, equivalent to 9.3% of GDP of the year. The consumption growth directly driven by citizenized migrants is about 8 trillion yuan, equivalent to 4.7 percentage points of the GDP. Migrants are not only labor forces but also important consumers for urban areas. Therefore,to expand domestic demands and shift economic development paradigm, it is crucial to citizenize migrants as soon as possible by accelerating the construction of new-type urbanization and the reform of household registration system.

关键词： Migrants income elasticity of demand citizenization consumption potential