检索结果-南通市图书馆

China Communications 2022年第7期19卷 67-78页

作者： shuo Zhang shuo shi Weizhi Wang Zhenyu Xu Xuemai Gu School of Electronic and Information Engineering Harbin Institute of TechnologyHarbin 150001China Peng Cheng Laboratory Shenzhen 518055China Department of Intelligent Engineering Huizhou Engineering Vocational CollegeHuizhou 516023China

The space-air-ground integrated network(SAGIN)has gained widespread attention from academia and industry in recent *** is widely applied in many practical fields such as global observation and mapping,intelligent transportation systems,and military *** an information carrier of air platforms,the deployment strategy of unmanned aerial vehicles(UAVs)is essential for communication systems’*** this paper,we discuss a UAV broadcast coverage strategy that can maximize energy efficiency(EE)under terrestrial users’*** to the non-convexity of this issue,conventional approaches often solve with heuristics algorithms or alternate *** this end,we propose an iterative algorithm by optimizing trajectory and power allocation ***,we discrete the UAV trajectory into several stop points and propose a user grouping strategy based on the traveling salesman problem(TSP)to acquire the number of stop points and the optimization ***,we use the Dinkelbach method to dispose of the fractional form and transform the original problem into an iteratively solvable convex optimization problem by variable substitution and Taylor *** results validate our proposed solution and outperform the benchmark schemes in EE and mission completion time.

关键词： SAGIN UAV energy efficiency(EE)maximization trajectory optimization power allocation

Nanotechnologies for enhancing cancer immunotherapy

在线全文

学校读者我要写书评

暂无评论

Nano Research 2020年第10期13卷 2595-2616页

作者： Jingxian Yang Chunhui Wang shuo shi Chunyan Dong Breast cancer center Shanghai East HospitalSchool of MedicineShanghai Key Laboratory of Chemical Assessment and SustainabilitySchool of Chemical Science and EngineeringTongji UniversityShanghai 200120China

Immunotherapy,a burgeoning field differs from traditional cancer treatments,is revolutionizing oncologic *** aims to stimulate the innate and adaptive immune system of a patient to fight against tumor ***,low response rate and immune-related adverse effects(irAEs)remain problems during its management.A novel technology using nanomaterials may bring a *** nanoparticles have been investigated as delivery systems to augment cancer therapeutic efficacy in the lab and *** this review,we briefly summarize the connotation of immunotherapy,the application of nanotechnology in cancer,especially focusing on the synergistic effect of nanoplatform-based technology combined with cancer immunotherapy,hoping to make readers a deep insight into this interdisciplinary field.

关键词： cancer im munotherapy nanoplatform-based technology combination therapy synergistic effect

Service-Driven Coded Forward Scheme Based on Streaming Transmission Model for Lunar Space Communication Networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Communications 2020年第7期17卷 15-26页

作者： Shushi Gu Ye Wang Guoqing Chen shuo shi School of Electronic and Information Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China Peng Cheng Laboratory Shenzhen 518055China School of Electronic and Information Engineering Harbin Institute of TechnologyHarbin 150001China

With the rapid development of lunar exploration,a large amount of scientific data and media stream service needs to be transmitted through Lunar Space Communication Networks(LSCNs).Due to limited transmitter power and intermittent,long delay and packet loss connections,the reliable and efficient multi-priority services’transmission in LSCNs becomes an urgent ***,we propose a Streaming Transmission Model(STM)based on temporal and spatial topology graph to describe the delay and energy consumption for data transmission in ***,we further devise a Coded Forward Scheme based on STM,termed CFS-STM,to achieve multi-priority service in two steps:i).Link Stability Function(LSF)is established by solving an optimization problem to choose the appropriate single-hop ***).Raptor code is employed to further save delay and energy with adjustable code-rate according to the different channel *** results show that,CFS-STM can significantly improve the transmission efficiency of multi-service priority streaming delivery in LSCNs.

关键词： Streaming service delay

NOMA Empowered Energy Efficient Data Collection and Wireless Power Transfer in Space-Air-Ground Integrated Networks

在线全文

学校读者我要写书评

暂无评论

China Communications 2023年第8期20卷 17-31页

作者： Cong Zhou shuo shi Chenyu Wu Zhenyu Xu School of Electronic and Information Engineering Harbin Institute of TechnologyHarbin 150001China Peng Cheng Laboratory Shenzhen 518055China Department of Intelligent Engineering Huizhou Engineering Vocational CollegeHuizhou 516023China

As the sixth generation network(6G)emerges,the Internet of remote things(IoRT)has become a critical ***,conventional terrestrial networks cannot meet the delay-sensitive data collection needs of IoRT networks,and the Space-Air-Ground integrated network(SAGIN)holds *** propose a novel setup that integrates non-orthogonal multiple access(NOMA)and wireless power transfer(WPT)to collect latency-sensitive data from IoRT *** extend the lifetime of devices,we aim to minimize the maximum energy consumption among all IoRT *** to the coupling between variables,the resulting problem is *** first decouple the variables and split the original problem into four ***,we propose an iterative algorithm to solve the corresponding subproblems based on successive convex approximation(SCA)techniques and slack ***,simulation results show that the NOMA strategy has a tremendous advantage over the OMA scheme in terms of network lifetime and energy efficiency,providing valuable insights.

关键词： NOMA Space-Air-Ground Integrated Networks data collection wireless power transfer resource allocation trajectory optimization

Bioinspired All‑Fibrous Directional Moisture‑Wicking Electronic Skins for Biomechanical Energy Harvesting and All‑Range Health Sensing

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2023年第4期15卷 277-293页

作者： Chuanwei Zhi shuo shi Shuai Zhang Yifan Si Jieqiong Yang shuo Meng Bin Fei Jinlian Hu Department of Biomedical Engineering City University of Hong KongHong Kong S.A.R 999077China Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHong Kong S.A.R 999077China City University of Hong Kong Shenzhen Research Institute Shenzhen 518057People’s Republic of China

Electronic skins can monitor minute physiological signal variations in the human skins and represent the body’s state,showing an emerging trend for alternative medical diagnostics and human-machine *** this study,we designed a bioinspired directional moisture-wicking electronic skin(DMWES)based on the construction of heterogeneous fibrous membranes and the conductive MXene/CNTs electrospraying *** moisture transfer was successfully realized by surface energy gradient and push-pull effect via the design of distinct hydrophobic-hydrophilic difference,which can spontaneously absorb sweat from the *** DMWES membrane showed excellent comprehensive pressure sensing performance,high sensitivity(maximum sensitivity of 548.09 kPa^(−1)),wide linear range,rapid response and recovery *** addition,the single-electrode triboelectric nanogenerator based on the DMWES can deliver a high areal power density of 21.6μW m^(−2) and good cycling stability in high pressure energy ***,the superior pressure sensing and triboelectric performance enabled the DMWES for all-range healthcare sensing,including accurate pulse monitoring,voice recognition,and gait *** work will help to boost the development of the next-generation breathable electronic skins in the applications of AI,human-machine interaction,and soft robots.

关键词： Bioinspired Electrospinning Electronic skin Directional moisture wicking MXene

The US Unanticipated Costs of Decoupling from China

在线全文

学校读者我要写书评

暂无评论

China & World Economy 2020年第6期28卷 1-27页

作者： Jun Zhang shuo shi School of Economics and China Center for Economic Studies Fudan UniversityShanghai Institute of International Finance and EconomicsChina China Center for Economic Studies Fudan UniversityChina

The decoupling policies enforced by the Trump Administration aim to break the US economic relationship with *** policies,however,are escalating strategic costs for the US in at least three unanticipated ways:the decoupling policies are losing the endorsement o f US multinational corporations,undermining the solidarity o f the US and its allies,and making supply chains more likely to disengage from the US than to disengage from *** argue that the ongoing decoupling policies are costing more than the US can bear and will end in *** the Trump Administration enforces further decoupling policies without considering those implicit costs,it will only set the US up for a more expensive failure.

关键词： China COVID-19 decoupling global supply chains

Evaporative/radiative electrospun membrane for personal cooling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2023年第2期16卷 2563-2571页

作者： Mohammad Irfan Iqbal shuo shi Gokula Manikandan Senthil Kumar Jinlian Hu Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHong Kong 999077China Department of Biomedical Engineering City University of Hong KongHong Kong 999077China Department of Building Environment and Energy Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China

Functional textiles that promote daily comfort and productivity must efficiently release body sweats and transmit radiative heat through sweat evaporation and mid-infrared radiation(MIR)(8–13μm).However,most of the traditional clothing cannot provide simultaneous sweat evaporation and mid-infrared radiation transmission efficiently,leading to a poor design of personal cooling ***,an evaporative/radiative integrated functional fibrous electrospun membrane is meticulously designed and controllably fabricated via facile electrospinning technology for personal cooling *** developed membrane can be applied as a smart wearable with distinct personal thermal management *** promising temperature and humidity responsive vapor transmission of the membrane grants 1.2 times of evaporative cooling than that of traditional ***,based on its high mid-infrared radiation transmission(53%)property in the range of 8–13μm,the as-spun membrane provides extra cooling of 1.5°C than that of ***,the building energy saving performances demonstrated that 47.1%annual building cooling can be achieved using the developed electrospun *** general,the evaporative/radiative electrospun membrane creates a passive cooling microclimate for the human body,meeting the growing demand of wearable for personal cooling.

关键词： building energy cooling management electrospinning evaporative cooling radiative cooling

Shock Tube Measurement of Ethylene Ignition Delay Time and Molecular Collision Theory Analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2016年第6期29卷 761-766,I0002页

作者： Xiao-he Xiong Yan-jun Ding shuo shi Zhi-min Peng StateKeyLabofPowerSystems DepartmentofThermalEngineeringTsinghuaUniversityBeij'inE100084China

In this study, 75% and 96% argon diluent conditions were selected to determine the ig- nition delay time of stoichiometric mixture of C2Ha/O2/Ar within a range of pressures （1.3-：3.0 arm） and temperatures （1092-1743 K）. Results showed a logarithmic linear rela- tionship of the ignition delay time with the reciprocal of temperatures. Under both two diluent conditions, ignition delay time decreased with increased temperature. By multiple linear regression analysis, the ignition delay correlation was deduced. According to this correlation, the calculated ignition delay time in 96% diluent was found to be nearly five times that in 75% diluent. To explain this discrepancy, the hard-sphere collision theory was adopted, and the collision numbers of ethylene to oxygen were calculated. The total collision numbers of ethylene to oxygen were 5.99×10^30 s^-1cm^-3 in 75% diluent and 1.53×10^29 s^-1cm^-3 in 96% diluent （about 40 times that in 75% diluent）. According to the discrepancy between ignition delay time and collision numbers, viz. 5 times corresponds to 40 times, the steric factor can

关键词： Shock tube Ethylene Ignition delay Molecule collision

Phylogeny and Classifcation of Prunus sensu lato (Rosaceae)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2013年第11期55卷 1069-1079页

作者： shuo shi Jinlu Li Jiahui Sun Jing Yu shiliang Zhou State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany the Chinese Academy of Sciences University of Chinese Academy of Sciences College of Landscape Architecture Northeast Forestry University

The classification of the economically important genus Prunus L. sensu lato （s.L） is controversial due to the high levels of convergent or the parallel evolution of morphological characters. In the present study, phylogenetic analyses of fifteen main segregates of Prunus s.I. represented by eighty-four species were conducted with maximum parsimony and Bayesian approaches using twelve chloroplast regions （atpB- rbcL, matK, ndhF, psbA-trnH, rbcL, rpL 16, rpoC1, rps16, trnS-G, trnL, trnL-F and ycfl） and three nuclear genes （ITS, s6pdh and Sbel） to explore their infrageneric used to develop a new, phylogeny-based classification relationships. The results of these analyses were of Prunus s.I. Our phylogenetic reconstructions resolved three main clades of Prunus s.I. with strong supports. We adopted a broad-sensed genus, Prunus, and recognised three subgenera corresponding to the three main clades： subgenus Padus, subgenus Cerasus and subgenus Prunus. Seven sections of subgenus Prunus were recognised. The dwarf cherries, which were previously assigned to subgenus Cerasus, were included in this subgenus Prunus. One new section name, Prunus L. subgenus Prunus section Persicae （T. T. yu ＆ L. T. Lu） S. L. Zhou and one new species name, Prunus tianshanica （Pojarkov） S. shi, were proposed.

关键词： Amygdaloideae phylogeny Prunoideae Prunus taxonomy.

Multidisciplinary Modeling and Optimization Method of Remote Sensing Satellite Parameters Based on SysML-CEA

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2023年第5期135卷 1413-1434页

作者： Changyong Chu Chengfang Yin shuo shi Shaohui Su Chang Chen School of Mechanical Engineering Hangzhou Dianzi UniversityHangzhou310018China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan430074China

To enhance the efficiency of system modeling and optimization in the conceptual design stage of satellite parameters,a system modeling and optimization method based on System Modeling Language and Co-evolutionary Algorithm is *** first,the objectives of satellite mission and optimization problems are clarified,and a design matrix of discipline structure is constructed to process the coupling relationship of design variables and constraints of the orbit,payload,power and quality *** order to solve the problem of increasing nonlinearity and coupling between these disciplines while using a standard collaborative optimization algorithm,an improved genetic algorithm is proposed and applied to system-level and discipline-level ***,the CO model of satellite parameters is solved through the collaborative simulation of Cameo Systems Modeler(CSM)and *** result obtained shows that the method proposed in this paper for the conceptual design phase of satellite parameters is efficient and *** can shorten the project cycle effectively and additionally provide a reference for the optimal design of other complex projects.

关键词： SysML remote sensing satellite multidisciplinary design optimization collaborative optimization