检索结果-南通市图书馆

Restricted dispersal determines fine-scale spatial genetic structure of Mongolian gerbils

Current Zoology 2017年第6期63卷 687-691页

作者： Guiming WANG Wei LIU Yanni wang Xinrong WAN Wenqin ZHONG Department of Wildlife Fisheries and Aquaculture Mississippi State University Mail Stop 9690 Mississippi State MS 39762 USA Institute of Zoology Chinese Academy of Sciences State Key Laboratory of Integrated Management of Pest Insects and Rodents 1 Beichen West Road Chaoyang District Beijing 100101 China University of Chinese Academy of Sciences Beijing 100190 China College of Chemistry and Life Sciences Zhejiang Normal University 688 Yingbin Road Jinhua Zhejiang 321004 China

Restricted gene flow may cause positive spatial genetic autocorrelation of animal populations at fine spatial scales. The Mongolian gerbil is a territorial, social rodent. Territoriality may create social fences to restrict dispersal or gene flow of Mongolian gerbils to a short distance. Restricted dispersal may differentiate fine-scale spatial genetic structure of populations with increasing distances (i.e., isolation by distance [IBD]). Competition for mates and inbreeding avoidance may result in equal dispersal propensity and subsequently similar spatial genetic autocorrelation between males and females of monogamous gerbils. We genotyped 327 gerbils, live captured from 26 burrow systems on a 9-ha plot in northcentral Inner Mongolia, China, using seven microsatellite loci. Spatial genetic autocorrelation was positive within 80 m and became negative from 80 m to 200 m, suggesting restricted gene flow. Inter-group genetic and geographic distances were related positively, supporting the IBD model. Live trapping data demonstrated equal dispersal propensities of male and female gerbils. Restricted dispersal and social organization may determine fine-scale spatial population genetic structure of social rodents.

关键词： Meriones unguiculatus dispersal isolation by distance microsatellite analysis social rodents spatial genetic autocorrelation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Joint Access Point Selection and Resource Allocation in MEC-Assisted Network:A Reinforcement Learning Based Approach

引用

China Communications 2022年第6期19卷 205-218页

作者： Zexu Li Chunjing Hu Wenbo wang Yong Li guiming Wei Key Laboratory of Universal Wireless Communications Beijing University of Posts and TelecommunicationsBeijing 100876China China Academy of Information and Communications Technology Beijing 100191China

A distributed reinforcement learning(RL)based resource management framework is proposed for a mobile edge computing(MEC)system with both latency-sensitive and latency-insensitive services.We investigate joint optimization of both computing and radio resources to achieve efficient on-demand matches of multi-dimensional resources and diverse requirements of users.A multi-objective integer programming problem is formulated by two subproblems,i.e.,access point(AP)selection and subcarrier allocation,which can be solved jointly by our proposed distributed RL-based approach with a heuristic iteration algorithm.The proposed algorithm allows for the reduction in complexity since each user needs to consider only its own selection of AP without knowing full global information.Simulation results show that our algorithm can achieve near-optimal performance while reducing computational complexity significantly.Compared with other algorithms that only optimize either of the two sub-problems,the proposed algorithm can serve more users with much less power consumption and content delivery latency.

关键词： mobile edge computing joint resource allocation reinforcement learning

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

PDA/gold nanorod-based nanoparticles for synergistic genetic and photothermal combination therapy for cancer treatment

引用

ChemPhysMater 2023年第1期2卷 83-89页

作者： guiming Niu Li Zhao Yandong wang Yanyan Jiang Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China Shenzhen Research Institute of Shandong University Shenzhen 518057China

A series of new nanobiotechnology-based methods have been developed toward achieving safe and efficient cancer treatment.Gold nanorods(AuNRs)have attracted increasing attention owing to their unique optical char-acteristics,good biocompatibility,and low toxicity,and they have thus been widely used in tumor treatment.In this study,an AuNR-based system was designed by attaching microRNA-192(miR-192)to polydopamine-coated AuNRs(AuNR@PDA)to explore the possibility of combining genetic and photothermal therapies.RNA/AuNR@PDA exhibited an excellent thermal conversion efficiency under near-infrared(NIR)laser irradi-ation and excellent biocompatibility.Thus,photothermal therapy(PTT)was combined with gene therapy,which was effected by miR-192,a genetic drug that inhibits cancer cell growth.The combinatory treatment approach entailing the AuNRs-based drug carrier system exhibited encouraging antitumor efficacy.

关键词： Gold nanorods Surface functionalization Gene therapy Photothermal therapy Combination treatment

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence and optimization of parameters of prepreg viscosity during placement

引用

Chinese Journal of Aeronautics 2022年第4期35卷 438-449页

作者： Lei ZU Xianzhao XIA Qian ZHANG Xiaolong JIA Huabi wang guiming ZHANG Jinhu LU Anhui Province Key Laboratory of Aerospace Structural Parts Forming Technology and Equipment Hefei University of TechnologyHefei 230009China Key Laboratory of Carbon Fiber and Functional Polymers Ministry of EducationBeijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China

This paper tested the viscosity of prepreg in the automatic placement process, and conducted the probe and placement-90° peel tests through the test systems. The law of variation of prepreg viscosity during the laying process was studied through these tests under different conditions by taking the peel force to intuitively and quantitatively characterise the viscosity of the prepreg.The results show that this viscosity is inversely proportional to the laying rate, proportional to the laying pressure, and quadratic to the laying temperature. Then, peel tests were simulated to validate both the correctness of the peel test and that of the probe test data fitting the two-line cohesion model. On this basis, a response surface test for laying and peeling was designed. Taking viscous peel force as the response target, the laying process parameters were optimised and the significance of their influence was further studied. The error between the test value and the predicted value of the maximum viscous peel force is 3.03%.

关键词： Automatic placement Cohesion model Optimization Peel test Probe test Significance of influence Viscosity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Safety effects of work zone advisory systems under the intelligent connected vehicle environment:a microsimulation approach

Journal of Intelligent and Connected Vehicles

引用

Journal of Intelligent and Connected Vehicles 2021年第1期4卷 16-27页

作者： Suyi Mao guiming Xiao Jaeyoung Lee Ling wang Zijin wang Helai Huang School of Traffic and Transportation Engineering Central South UniversityChangshaChina College of Transportation Engineering Tongji UniversityShanghaiChina Department of Civil Environmental and Construction EngineeringUniversity of Central FloridaOrlandoFloridaUSA

Purpose–This study aims to investigate the safety effects of work zone advisory systems.The traditional system includes a dynamic message sign(DMS),whereas the advanced system includes an in-vehicle work zone warning application under the connected vehicle(CV)environment.Design/methodology/approach–A comparative analysis was conducted based on the microsimulation experiments.Findings–The results indicate that the CV-based warning system outperforms the DMS.From this study,the optimal distances of placing a DMS varies according to different trafﬁc conditions.Nevertheless,negative inﬂuence of excessive distance DMS placed from the work zone would be more obvious when there is heavier trafﬁc volume.Thus,it is recommended that the optimal distance DMS placed from the work zone should be shortened if there is a trafﬁc congestion.It was also revealed that higher market penetration rate of CVs will lead to safer network under good trafﬁc conditions.Research limitations/implications–Because this study used only microsimulation,the results do not reﬂect the real-world drivers’reactions to DMS and CV warning messages.A series of driving simulator experiments need to be conducted to capture the real driving behaviors so as to investigate the unresolved-related issues.Human machine interface needs be used to simulate the process of in-vehicle warning information delivery.The validation of the simulation model was not conducted because of the data limitation.Practical implications–It suggests for the optimal DMS placement for improving the overall efﬁciency and safety under the CV environment.Originality/value–A trafﬁc network evaluation method considering both efﬁciency and safety is proposed by applying trafﬁc simulation.

关键词： Connected vehicles Driver behaviors and assistance Intelligent vehicles Vehicle dynamics and control Vehicle-to-infrastructure communication(V2I) Work zone Dynamic message sign(DMS) In-vehicle warning Traffic simulation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

GhIQD10 interacts with GhCaM7 to control cotton fiber elongation via calcium signaling

引用

The Crop Journal 2023年第2期11卷 447-456页

作者： Fan Xu Li wang Jun Xu Qian Chen Caixia Ma Li Huang guiming Li Ming Luo Key Laboratory of Biotechnology and Crop Quality Improvement of the Ministry of Agriculture Biotechnology Research CenterSouthwest UniversityChongqing 400715China Zhengzhou Research Base State Key Laboratory of Cotton BiologyZhengzhou UniversityZhengzhou 450001HenanChina Academy of Agricultural Sciences of Southwest University State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest UniversityChongqing 400715China

IQ67-domain(IQD)proteins function in plant defense and in organ development.The mechanisms by which they influence cotton fiber development are unknown.In the present study,GhIQD10 was expressed mainly in the transition period of cotton fiber development,and GhIQD10-overexpression lines showed shorter fibers.GhIQD10 interacted with GhCaM7 and the interaction was inhibited by Ca^(2+).In in vitro ovule culture,Ca^(2+)rescued the shorter-fiber phenotype of GhIQD10-overexpression lines,which were insensitive to the Ca^(2+)channel inhibitor verapamil and the Ca^(2+)pool release channel blocker 2-aminoethoxydiphenyl borate.We conclude that GhIQD10 affects cotton fiber elongation via Ca^(2+)signaling by interacting with GhCaM7.Brassinosteroid(BR)biosynthesis and signaling genes were up-regulated in GhIQD10-overexpression lines.Fiber development in these lines was not affected by epibrassinolide or the BR biosynthesis inhibitor brassinozole,indicating that the influence of GhIQD10 on fiber elongation was not associated with BR.

关键词： Cotton Fiber elongation IQ67-domian protein Ca^(2+) Brassinosteroid

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Revealing the effect of electrolyte coordination structures on the intercalation chemistry of batteries

引用

Journal of Energy Chemistry 2023年第6期81卷 149-156,I0006页

作者： Chao wang Xianjin Li guiming Zhong Caixia Meng Shiwen Li Guohui Zhang Yanxiao Ning Xianfeng Li Qiang Fu State Key Laboratory of Catalysis iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Department of Chemical Physics University of Science and Technology of ChinaHefei 230026AnhuiChina Laboratory of Advanced Spectro-electrochemistry and Li-ion Batteries Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian116023LiaoningChina Division of Energy Storage Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina

In-depth understanding of the electrolyte-dependent intercalation chemistry in batteries through direct operando/in situ characterizations is crucial for the development of the high-performance batteries.Herein,taking the Al/graphite battery as a model system,the effect of electrolyte coordination structure on the intercalation processes has been investigated over the batteries with either 1-hexyl-3-methylimidazolium chloride(HMICl)-AlCl_(3) or 1-ethyl-3-methylimidazolium chloride(EMICl)-AlCl_(3) ionic liquid electrolyte using operando X-ray photoelectron spectroscopy(XPS)and X-ray diffraction.With a weaker anion-cation interaction in HMI-based electrolyte,the XPS-derived atomic ratio between cointercalated N and intercalated Al is 0.9,which is lower than 1.6 for EMI-based electrolyte.Attributed to the additional de-solvation process,the batteries with the HMI-based electrolyte show a lower ionic diffusion rate,capacity,and cycling performance,which agree with the operando characterization results.Our findings highlight the critical role of the electrolyte coordination structure on the(co-)intercalation chemistry.

关键词： Operando surface characterization Electrolyte coordination structure De-solvation Intercalation chemistry

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Restricted cross-scale habitat selection by American beavers

引用

Current Zoology 2017年第6期63卷 703-710页

作者： Robert A. FRANCIS Jimmy D. TAYLOR Eric DIBBLE Bronson STRICKLAND Vanessa M. PETRO Christine EASTERWOOD Guiming WANG Department of Wildlife Fisheries and Aquaculture Thompson Hall Mississippi State University Starkville MS 39762 USA USDA APHIS Wildlife Services National Wildlife Research Center Corvallis 3180 SW Jefferson Wav OR 97331 USA Department of Forest Ecosystems and Society Oregon State University 321 Richardson Hall Corvallis OR 97331 USA Environmental Management Division US Army Garrison - Building 4488 Martin Rd SW Redstone Redstone Arsenal AL 35898 USA

Animal habitat selection, among other ecological phenomena, is spatially scale dependent. Habitat selection by American beavers (hereafter, beaver) has been studied at singular spatial scales, but to date no research addresses multi-scale selection. Our objectives were to determine if beaver habitat selection was specialized to semiaquatic habitats and if variables explaining habitat selection are consistent between landscape and fine spatial scales. We built maximum entropy (MaxEnt) models to relate landscape-scale presence-only data to landscape variables, and used generalized linear mixed models to evaluate fine spatial scale habitat selection using global positioning system (GPS) relocation data. Explanatory variables between the landscape and fine spatial scale were compared for consistency. Our findings suggested that beaver habitat selection at coarse (study area) and fine (within home range) scales was congruent, and was influenced by increasing amounts of woody wetland edge density and shrub edge density, and decreasing amounts of open water edge density. Habitat suitability at the landscape scale also increased with decreasing amounts of grass frequency. As territorial, central-place foragers, beavers likely trade-off open water edge density (i.e., smaller non-forested wetlands or lodges closer to banks) for defense and shorter distances to forage and obtain construction material. Woody plants along edges and expanses of open water for predator avoidance may limit beaver fitness and subsequently determine beaver habitat selection.

关键词： Castor canadensis maximum entropy scale-dependent selection space use wetland

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Multi-objective optimization of frequency and damping of vertical stabilizer skin structure placed with variable-angle tows

引用

Chinese Journal of Aeronautics 2023年第1期36卷 444-455页

作者： Lei ZU Xianzhao XIA Qian ZHANG guiming ZHANG Shijun CHEN Jianhui FU Lichuan ZHOU Huabi wang Debao LI Liqing ZOU School of Mechanical Engineering Hefei University of TechnologyHefei 230009China Anhui Province Key Laboratory of Aerospace Structural Parts Forming Technology and Equipment Hefei University of TechnologyHefei 230009China

The vibration characteristics of composite vertical stabilizer skin structures play a critical role in damping effects designed for overcoming the air disturbances experienced by aircraft structural components during flight.The first-order fundamental frequencies and their corresponding damping characteristics of the vertical stabilizer skin structure tow-steered by automatic fiber placement technique were optimized with the parameterized trajectories and plies as design variables.Firstly,the vibration and damping numerical models were derived based on Kirchhoff laminate theory,the Rayleigh-Ritz method,and the Strain Energy Method.Then the optimization model was developed by adopting the self-adaptive Differential Evolution Multi-objective optimization algorithm and incorporating the solution method of Pareto Front.The constraints of this optimization model considered the experimentally obtained minimum turning radius of prepregs tow-steered in automatic fiber placement process obtained from experimental tests.Finally,the comparison of numerical simulation results was conducted for the optimized trajectories and the conventional straight trajectories under various boundary conditions,and the numerical results were partially validated through damping and frequency tests.The results indicate the vibration characteristics of the composite vertical stabilizer skin structure can be enhanced to a large extent by optimizing fiber trajectories,and the enhancement percentage is affected by the boundary conditions of the actual structure.

关键词： Damping Fundamental frequency Multi-objective optimiza-tion Variable-angle tow Vertical stabilizer skin Vibration properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The origins of kinetics hysteresis and irreversibility of monoclinic Li_(3)V_(2)(PO_(4))_(3)

引用

Journal of Energy Chemistry 2022年第4期31卷 593-603页

作者： Hua Huo Zeyu Lin guiming Zhong Shuaifeng Lou Jiajun wang Yulin Ma Changsong Dai Yueping Xiong Geping Yin Yong Yang Key Laboratory of Materials for New Energy Conversion and Storage(Ministry of Industry and Information Technology) School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina State Key Laboratory for Physical Chemistry of Solid Surface and Department of Chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of SciencesXiamen 361021FujianChina

Monoclinic Li_(2)V_(2)(PO_(4))_(3);is a promising cathode material with complex charge–discharge behavior.Previous structural investigation of this compound mainly focuses on local environments;while the reaction kinetics and the driving force of irreversibility of this material remain unclear.To fully understand the above issues,both the equilibrium and the non-equilibrium reaction routes have been systematically investigated in this study.Multiple characterization techniques including X-ray diffraction,variable temperature(spinning rate)and ex/in situ ^(7)Li,^(31)P solid state NMR have been employed to provide comprehensive insights into kinetics,dynamics,framework structure evolution and charge ordering,which is essential to better design and application of lithium transition metal phosphate cathodes.Our results suggest that the kinetics process between the non-equilibrium and the quasi-equilibrium delithiation pathways from Li_(2)V_(2)(PO_(4))_(3);to V_(2)(PO_(4))_(3);is related with a slow relaxation from two-site to one-site delithiation.More importantly,it has been demonstrated that the irreversibility in this system is not solely affected by cation and/or charge ordering/disordering,but mainly driven by framework structure distortion.

关键词： NMR spectroscopy Electrochemistry Solid-state structures Kinetics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：