检索结果-南通市图书馆

Deep neural network for remote-sensing image interpretation: status and perspectives

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

National Science Review 2019年第6期6卷 1082-1086页

作者： Jiayi Li xin huang Jianya Gong School of Remote Sensing and Information Engineering Wuhan University State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan University

Deep neural networks(DNNs) refer to end-to-end mappings(i.e. from data to information) by stacking a large number of filters learned from massive samples. By courtesy of the comprehensive Earth observation platforms and convenient data access, remote-sensing practitioners are dealing with very large and ever-growing data volumes, which call for fast and transferrable machine-learning

关键词： status and perspectives image Deep neural network for remote-sensing image interpretation

Facile synthesis of gold nanoflowers as SERS substrates and their morphological transformation induced by iodide ions

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2016年第8期59卷 1045-1050页

作者： Shujun Zhen Tong Wu xin huang Yuanfang Li Chengzhi huang Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) Ministry of Education College of Chemistry and Chemical Engineering Southwest University 400715 Chongqing China Department of ChemiStry and Chemical Engineeringl Yibin University Yibin 644000 China College of Pharmaceutical Science Southwest University Chongqing 400715 China

We report a new strategy to prepare gold nanoflowers （AuNFs） using a two-step seed-mediated method. The as-prepared AuNFs were employed as surface-enhance Raman scattering （SERS） substrates, showing strong signal enhancement. We further found that iodide ions （I^-） could selectively induce the morphological transformation of AuNFs to spheres, resulting in a blue-shift of the localized surface plasmon resonance （LSPR） bands, a color change of the AuNFs solution from blue to red, and decreased SERS activity. This behavior allows the AuNFs to be used in the determination of I^-.

关键词： gold nanoflowers SERS iodide ions

Lamellar Spacing Selection in Regular Eutectic Solidification at Low Velocity

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2007年第6期23卷 851-854页

作者： Guanghui MENG xin LIN Weidong huang State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi＇an 710072 China

Based on the Jackson and Hunt＇s analysis, the selection of lamellar spacing in regular eutectics was reexamined at low velocity. The isothermal assumption was released and the effective interface undercooling was determined by the weighted average of the eutectic phases. It is found that the lamellar spacing minimized the effective interface undercooling depends only on the intrinsic characteristics of a given system at a fixed velocity. In addition, the selection of lamellar spacing is related to the relationship between the average interracial undercoolings of the eutectic phases and the lamellar spacing. The selected lamellar spacing obviously deviated from that predicted by the Jackson and Hunt＇s analysis if the variation of the average interracial undercoolings of the solid phases with the lamellar spacing was markedly different at a constant growth rate.

关键词： Solidification Eutectic Lamellar spacing Undercooling

Big data-Based Transformer Substation Fault Prediction Method

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2021年第2期19卷 173-185页

作者： xin Wu Jian Li Qi huang School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu 610054

Transformer substations play a major role in power *** fault of a transformer substation will jeopardize the safety and effective operation of the power *** fault signal of a transformer substation includes the fault status and fault occurrence *** this paper,we propose a transformer substation fault prediction method based on big data ***,a new transformer substation fault prediction method is developed by combining the advantages of decision tree algorithms and grey system theory to predict the fault status and occurrence time with high *** a case study,the transformer substation fault signals obtained from a region in the southwest of China are analyzed using the proposed method based on big *** experimental results confirm that the proposed method achieves high-accuracy fault prediction.

关键词： Big data decision tree grey system theory power system prediction

Joint Subcarrier and Power Allocation for Multi-UAV Systems

在线全文

学校读者我要写书评

暂无评论

China Communications 2019年第1期16卷 47-56页

作者： xin Guan Yang huang Qingjiang Shi College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space(NUAA) Ministry of Industry and Information Technology School of Software Engineering Tongji University

This paper investigates subcarrier and power allocation in a multi-UAV OFDM *** study considers a practical scenario,where certain subcarriers are unavailable for dynamic subcarrier allocation,on account of pre-allocation for burst *** first propose a novel iterative algorithm to jointly optimize subcarrier and power allocation,so as to maximize the sum rate of the uplink transmission in the multiUAV OFDM *** key idea behind our solution is converting the nontrivial allocation problem into a weighted mean square error(MSE) *** this means,the allocation problem can be solved by the alternating optimization ***,aiming at a lower-complexity solution,we propose a heuristic allocation scheme,where subcarrier allocation and transmit power allocation are separately *** the heuristic scheme,closedform solution can be obtained for power *** results demonstrate that in the presence of stretched subcarrier resource,the proposed iterative joint optimization algorithm can significantly outperform the heuristic scheme,offering a higher sum rate.

关键词： Multi-UAV OFDM subcarrier allocation power allocation alternating optimization weighted MSE

Temperature dependence of Lüders strain and its correlation with martensitic transformation in a medium Mn transformation-induced plasticity steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2017年第11期24卷 1073-1077页

作者： Xiao-gang Wang Ming-xin huang State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College ot Mechanical and Vehicle EngmeermgHunan UniversityChangsha 410082HunanChina Department of Mechanical Engineering The University of Hong KongPokfulam RoadHong KongChina

The Luders deformation behavior in a medium Mn transformation induced plasticity （TRIP） steel is investigated at different temperatures ranging from 25 to 300 ℃. It demonstrates that the Ltiders band appears at all testing temperatures but with varied Luders strains which do not change monoton ically with temperature. The martensitic transformation is simultaneously observed within the Ltiders band in varying degrees depending on the testing temperature. It is well verified that the martensitic transformation is not responsible for the formation of Luders band, and a reasonable explanation is given for the non-monotonic variation of Luders strain with increasing temperature.

关键词： Medium Mn steel TRIP effect Luders band Plastic instability Martensitic transformation

Convergence of complex martingale for a branching random walk in an independent and identically distributed environment

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2021年第1期16卷 187-209页

作者： xin WANG xingang LIANG Chunmao huang Department of General Education Wenzhou Business CollegeWenzhou 325035China School of Mathematics and Statistics Beijing Technology and Business UniversityBeijing 100048China Department of Mathematics Haxbin Institute of Technology(Weihai)Weihai 264209China

We consider anR^(d)-valued discrete time branching random walk in an independent and identically distributed environment indexed by time n∈*** W_(n)(z)(z∈C^(d))be the natural complex martingale of the *** show necessary and sufficient conditions for the L^(α)-convergence of W_(n)(z)forα>1,as well as its uniform convergence region.

关键词： Branching random walk random environment moments uniform convergence complex martingale L^(α)-convergence

Arabidopsis AIP1-1 regulates the organization of apical actin filaments by promoting their turnover in pollen tubes

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

Science China(Life Sciences) 2020年第2期63卷 239-250页

作者： Min Diao xin Li Shanjin huang Institute of Botany Chinese Academy of SciencesBeijing 100093China Center for Plant Biology School of Life SciencesTsinghua UniversityBeijing 100084China University of Chinese Academy of Sciences Beijing 100049China iHuman Institute Shanghai Tech UniversityShanghai 201210China

Apical actin filaments are highly dynamic structures that are crucial for rapid pollen tube growth, but the mechanisms regulating their dynamics and spatial organization remain incompletely understood. We here identify that AtAIP1-1 is important for regulating the turnover and organization of apical actin filaments in pollen tubes. AtAIP1-1 is distributed uniformly in the pollen tube and loss of function of AtAIP1-1 affects the organization of the actin cytoskeleton in the pollen tube. Specifically, actin filaments became disorganized within the apical region of aip1-1 pollen tubes. Consistent with the role of apical actin filaments in spatially restricting vesicles in pollen tubes, the apical region occupied by vesicles becomes enlarged in aip1-1 pollen tubes compared to WT. Using ADF1 as a representative actin-depolymerizing factor, we demonstrate that AtAIP1-1 enhances ADF1-mediated actin depolymerization and filament severing in vitro, although AtAIP1-1 alone does not have an obvious effect on actin assembly and disassembly. The dynamics of apical actin filaments are reduced in aip1-1 pollen tubes compared to WT. Our study suggests that AtAIP1-1 works together with ADF to act as a module in regulating the dynamics of apical actin filaments to facilitate the construction of the unique "apical actin structure" in the pollen tube.

关键词： pollen tube apical actin structure actin dynamics actin turnover ADF AIP1

Genetic algorithm based dynamic combination of polyhedron structures against multiple link failures

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2022年第6期29卷 30-35页

作者： Liu Yu Li xin huang Shanguo School of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

Polyhedron protection realizes link protection by constructing a pre-assigned structure and allocates backup resources on a fixed polyhedron structure based on the maximum number of working resources. Taking into account both protection success rate and resource redundancy, this paper dynamically combines different polyhedron structures to allocate backup resources according to the link load, and proposes a genetic algorithm based dynamic combination of polyhedron structures(GA-DCPS) to reduce the resource consumption in the network while ensuring the protection success rate. GA-DCPS aims to minimize the consumption of wavelength resources, and uses the genetic strategy to find the polyhedron combination with the least redundancy to allocate backup resources while ensuring the success rate of service protection. Compared to using the fixed polyhedron structure with 1:m backup resource allocation, GA-DCPS can reduce resource redundancy by about 15% while ensuring complete protection against double-link failures.

关键词： optical networks multiple link failures polyhedron protection resource redundancy