检索结果-南通市图书馆

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

基于多层次互补特征的通用目标检测模型

电子与信息学报 2012年第7期34卷 1531-1537页

作者：潘泓金立左夏思宇夏良正东南大学自动化学院南京210096

针对实际场景中多类目标检测问题,该文提出了一种基于多层次特征表示和异质互补描述子的通用目标检测模型。该模型采用基于组件的目标描述思想,提取目标不同层次的互补特征,并将其统一到条件随机场(CRF)框架中。目标中单个组件及其局部... 详细信息

针对实际场景中多类目标检测问题,该文提出了一种基于多层次特征表示和异质互补描述子的通用目标检测模型。该模型采用基于组件的目标描述思想,提取目标不同层次的互补特征,并将其统一到条件随机场(CRF)框架中。目标中单个组件及其局部特征对应CRF的一元节点,组件之间的几何空间结构特征则体现在节点之间的两两连接关系上。通过引入节点支持向量机(SVM)分类器和边缘拓扑结构学习,极大提高了模型的鉴别能力和灵活性。在UIUC多尺度数据集和PASCAL VOC 2007数据集上测试结果表明,该文模型不仅能有效描述多类复杂目标,还能较好地解决姿态、尺度、光照变化及局部遮挡情况下的目标检测问题。

关键词：通用目标检测多层次特征描述异构特征条件随机场

Mass spectrometry analysis of intact protein N-glycosylation signatures of cells and sera in pancreatic adenocarcinomas

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第1期25卷 51-64页

作者： Mingming XU Zhaoliang LIU Wenhua HU Ying HAN Zhen WU Sufeng CHEN Peng xia Jing DU Xumin ZHANG Piliang HAO Jun xia Shuang YANG Center for Clinical Mass Spectrometry College of Pharmaceutical SciencesSoochow UniversitySuzhou215123China School of Life Science and Technology ShanghaiTech UniversityShanghai201210China State Key Laboratory of Genetic Engineering Department of BiochemistrySchool of Life SciencesFudan UniversityShanghai200438China Department of Clinical Laboratory Center Zhejiang Provincial People’s HospitalPeople’s Hospital of Hangzhou Medical CollegeHangzhou310014China

Pancreatic cancer is among the most malignant cancers,and thus early intervention is the key to better survival ***,no methods have been derived that can reliably identify early precursors of development into ***,it is urgent to discover early molecular changes during pancreatic *** aberrant glycosylation is closely associated with cancer progression,numerous efforts have been made to mine glycosylation changes as biomarkers for diagnosis;however,detailed glycoproteomic information,especially site-specific N-glycosylation changes in pancreatic cancer with and without drug treatment,needs to be further ***,we used comprehensive solid-phase chemoenzymatic glycoproteomics to analyze glycans,glycosites,and intact glycopeptides in pancreatic cancer cells and patient *** profiling of N-glycans in cancer cells revealed an increase in the secreted glycoproteins from the primary tumor of MIA PaCa-2 cells,whereas human sera,which contain many secreted glycoproteins,had significant changes of glycans at their specific *** results indicated the potential role for tumor-specific glycosylation as disease *** also found that AMG-510,a small molecule inhibitor against Kirsten rat sarcoma viral oncogene homolog(KRAS)G12C mutation,profoundly reduced the glycosylation level in MIA PaCa-2 cells,suggesting that KRAS plays a role in the cellular glycosylation process,and thus glycosylation inhibition contributes to the anti-tumor effect of AMG-510.

关键词： Pancreatic cancer Glycosylation Biomarker Glycoproteomics Mass spectrometry

磁性壳聚糖/ZnS∶Fe复合纳米粒子的制备及其对孔雀石绿的光催化降解（英文）

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

发光学报 2019年第8期40卷 993-1000页

作者：夏虹彭茂民刘丽湖北省农业科学院农业质量标准与检测技术研究所

采用化学共沉淀法制备了磁性壳聚糖,然后以制得磁性壳聚糖纳米粒子为基体,利用层层自组装原理,在磁性壳聚糖表面原位生长ZnS∶Fe纳米晶,制备得到磁性壳聚糖/ZnS∶Fe复合纳米粒子。采用XRD和VSM对其进行表征,结果表明,制备得到的磁性壳聚... 详细信息

采用化学共沉淀法制备了磁性壳聚糖,然后以制得磁性壳聚糖纳米粒子为基体,利用层层自组装原理,在磁性壳聚糖表面原位生长ZnS∶Fe纳米晶,制备得到磁性壳聚糖/ZnS∶Fe复合纳米粒子。采用XRD和VSM对其进行表征,结果表明,制备得到的磁性壳聚糖/ZnS∶Fe复合纳米粒子具有超顺磁性能,室温下饱和磁化强度为15.88A·m2·kg^-1。以孔雀石绿为模型污染物,采用UV-Vis手段研究磁性壳聚糖/ZnS∶Fe复合纳米粒子的光催化降解性能。实验结果表明,向初始浓度为10mg/L孔雀石绿溶液中加入100mg/L磁性壳聚糖/ZnS∶Fe复合纳米粒子,60min时孔雀石绿的去除率为95.3%,重复使用5次后,降解率略有降低(从95.3%降低到80.8%),其反应过程符合假一级动力学的假设。因此,磁性壳聚糖/ZnS∶Fe复合纳米粒子可以光催化降解孔雀石绿。

关键词：磁性壳聚糖 ZnS∶Fe 量子点孔雀石绿光催化降解

在线全文

学校读者我要写书评

暂无评论

并发故障信息DSmT融合算法的应用研究

湖南大学学报（自然科学版） 2015年第2期42卷 35-39,59页

作者：郭清夏虹韩文伟哈尔滨工程大学工程训练中心黑龙江哈尔滨150001 哈尔滨工程大学核安全与仿真技术国防重点学科实验室黑龙江哈尔滨150001

针对主冷却泵长期工作在高温、高压及高辐射的恶劣工作环境中,其并发故障存在较高概率并难以诊断,提出一种DSmT决策级融合算法,构建了泵主轴转子不平衡、泵主轴转子不对中及主轴损坏的DSmT辨识理论框架,由实测采集数据综合确定DSmT故障... 详细信息

针对主冷却泵长期工作在高温、高压及高辐射的恶劣工作环境中,其并发故障存在较高概率并难以诊断,提出一种DSmT决策级融合算法,构建了泵主轴转子不平衡、泵主轴转子不对中及主轴损坏的DSmT辨识理论框架,由实测采集数据综合确定DSmT故障特征信度赋值,利用DSmT对多个独立证据源进行决策判断得出主冷却剂泵故障及并发故障的诊断结果.实验结果表明该方法能有效识别主冷却剂泵并发故障特征,具有一定的理论基础及工程应用价值.

关键词： DSmT(中文全称) 并发故障信息融合故障识别

Game Theoretical Control of Service Rates in Closed Jackson Networks

在线全文

学校读者我要写书评

暂无评论

Game Theoretical Control of Service Rates in Closed Jackson ...

H_(∞) state estimation for Markov jump neural networks with transition probabilities subject to the persistent dwell-time switching rule

第25届中国控制与决策会议

作者： Li xia Qing-Shan Jia the Center for Intelligent and Networked Systems （CFINS） Department of Automation TNList Tsinghua University

ISBN: (纸本)9781467355339

The servers’ competition for resources is a common phenomena in queueing systems. In this paper, we discuss the service rate control problem of queueing networks from a game theoretical perspective. The payoff function of each server is composed of two parts, the holding cost and the operating cost. Each server independently chooses their service rates in order to maximize their own average payoff. We formulate this problem as a game and prove that the average payoff of each server has a monotonic property. We further develop an iterative algorithm to find the Nash equilibrium of this game. Simulation experiments are conducted to demonstrate the main idea of the paper.

关键词： Game theory service rate control queueing networks Nash equilibrium.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第6期30卷 88-95页

作者： Hao Shen Jia-Cheng Wu Jian-Wei xia Zhen Wang College of Electrical and Information Engineering Anhui University of TechnologyMa'anshan 243032China School of Mathematical Sciences Liaocheng UniversityLiaocheng 252059China College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China

We investigate the problem of H_(∞) state estimation for discrete-time Markov jump neural networks. The transition probabilities of the Markov chain are assumed to be piecewise time-varying, and the persistent dwell-time switching rule,as a more general switching rule, is adopted to describe this variation characteristic. Afterwards, based on the classical Lyapunov stability theory, a Lyapunov function is established, in which the information about the Markov jump feature of the system mode and the persistent dwell-time switching of the transition probabilities is considered ***, via using the stochastic analysis method and some advanced matrix transformation techniques, some sufficient conditions are obtained such that the estimation error system is mean-square exponentially stable with an H_(∞) performance level, from which the specific form of the estimator can be obtained. Finally, the rationality and effectiveness of the obtained results are verified by a numerical example.

关键词： Markov jump neural networks persistent dwell-time switching rule H_(∞)state estimation meansquare exponential stability

Dynamic Nonreciprocity with a Kerr Nonlinear Resonator

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

Chinese Physics Letters 2022年第12期39卷 28-34页

作者： Rui-Kai Pan Lei Tang Keyu xia Franco Nori College of Engineering and Applied Sciences National Laboratory of Solid State Microstructuresand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China College of Physics and Electronic Engineering Sichuan Normal UniversityChengdu 610101China Jiangsu Key Laboratory of Artificial Functional Materials Nanjing UniversityNanjing 210023China Shishan Laboratory Suzhou Campus of Nanjing UniversitySuzhou 215000China RIKEN Quantum Computing Center RIKEN Cluster for Pioneering ResearchWako-shiSaitama 351-0198Japan Physics Department The University of MichiganAnn ArborMichigan 48109-1040USA

On-chip optical nonreciprocal devices are vital components for integrated photonic systems and scalable quantum information *** optical isolators and circulators have attracted considerable attention because of their fundamental interest and their important advantages in integrated photonic ***,optical nonreciprocal devices based on Kerr or Kerr-like nonlinearity are subject to dynamical reciprocity when the forward and backward signals coexist simultaneously in a nonlinear ***,we theoretically propose a method for realizing on-chip nonlinear isolators and circulators with dynamic *** nonreciprocity is achieved via the chiral modulation on the resonance frequency due to coexisting self-and cross-Kerr nonlinearities in an optical ring *** work showing dynamic nonreciprocity with a Kerr nonlinear resonator can be an essential step toward integrated optical isolation.

关键词： Nonlinear nonlinear reciprocal

Carbon unloading in roots in relation to root senescence in Cercis chinensis seedlings under drought stress

在线全文

学校读者我要写书评

暂无评论

Forestry Studies in China 2009年第2期11卷 77-84页

作者： GAN Cai-xia WU Chu School of Horticulture and Gardening Yangtze University Hubei Province Jingzhou 434025 P. R. China Institute of Vegetables Hubei Academy of Agricultural Sciences Wuhan 430093 P. R. China

When Cercis chinensis seedlings suffered from drought treatment, net photosynthetic rates had been significantly reduced at the end of the drought treatment. Compared with the control, the activities of acid invertases in roots had increased 5 and 11 days after drought treatment. Seventeen days after drought treatment, the activities of acid invertases in roots were significantly decreased, while activities of alkaline invertases in roots had also been significantly reduced. As the moisture in culture media decreased, so the activities of sucrose synthases in leaves decreased slightly. In roots, their activities had significantly increased 5 and 11 days after drought treatment. The contents of fructose in roots reduced as the moisture in culture media decreased and 11 and 17 days after drought treatment the reduction was significant. The content of glucose in roots clearly did not change as drought stress occurred further, but was still less than that in the control seedlings. Similarly, the content of sucrose reduced as the moisture in culture media decreased. At the beginning of the drought stress, the content of sucrose was significantly higher than that in the control and afterwards there were no differences between drought-treated seedlings and the control. The gradient of the sucrose content between leaves and roots was 0.0982 mg.g^-1 FW 17 days after drought treatment, while the gradient of the seedlings under normal condition was 1.3832 mg.g^-1 FW. The sucrose concentration gradient reduced by 92.9%. The reduction in the sucrose content gradient under drought stress decreased the sucrose partitioning in roots. Therefore, our results support the hypothesis of‘shared control＇.

关键词： drought stress carbon unloading root senescence Cercis chinensis

Adaptive bit allocation scheme in multi-cell cooperative block diagonalization systems with delayed and limited feedback

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 2012年第5期19卷 9-15,25页

作者： GUI Xin KANG Gui-xia Huang Dong-yan LIUjia ZHANG Ping Wireless Technology Innovation Institute Beijing University of Posts and Telecommunications Beijing 100876 China Key Laboratory of Universal Wireless Communications Ministry of EducationBeijing University of Posts and Telecommunications Beijing 100876 China

In multi-cell cooperative multi-input multi-output （MIMO） systems, base station （BS） can exchange and utilize channel state information （CSI） of adjacent cell users to manage co-channel interference. Users quantize the CSIs of desired channel and interference channels using finite-rate feedback links, then BS can generate cooperative block diagonalization （BD） precoding matrices using the obtained quantized CSI at transmitter to supress co-channel interference. In this paper, a novel adaptive bit allocation scheme is proposed to minimize the rate loss due to imperfect CSI. We derive the closed-form expression of rate loss caused by both channel delay and limited feedback. Based on the derived rate loss expression, the proposed scheme can adaptively allocate more bits to quantize the better channels with smaller delays and fewer bits to worse channels with larger delays. Simulation results show that the proposed scheme yields higher performance than other allocation schemes.

关键词： block diagonalization multi-cell cooperative MIMO system adaptive bit allocation scheme channel delay and limited feedback