检索结果-南通市图书馆

Chinese Chemical Letters 2007年第7期18卷 773-776页

作者： wen yan hao Jian wen Jiang Ming Zhong Cai Department of Chemistry Jiangxi Normal University Nanchang 330022 China

（E）-α-Iodovinyl sulfones 1 underwent the Sonogashira coupling reactions with terminal alkynes 2 in piperidine at room temperature in the presence of 5 mol% of Pd（PPh3）4 and 10 mol% of CuI to stereospecifically af... 详细信息

关键词： (E)-α-Iodovinyl sulfone 1,3-Enynylsulfone Sonogashira coupling Terminal alkyne

SYSTEM FOR AUTOMATIC GENERALIZATION OF TOPOGRAPHIC MAPS

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2006年第2期16卷 165-170页

作者： yan hao-wen LI Zhi-lin AI Ting-hua School of Mathematics Physics and Software Engineering Lanzhou Jiaotong University Lanzhou 730070 19. R. China GIS Division Department of Geography University of Zurich Zurich Switzerland Department of Land Surveying ancl Geo-lnformatics the Hong Kong Polytechnic University Hong Kong P. R. China School of Resource and Environment Science Wuhan University Wuhan 430079 P. R. China

With the construction of spatial data infi＇astructure, automated topographic map generalization becomes an indispensable component in the community of cartography and geographic information science. This paper describes a topographic map generalization system recently developed by the authors. The system has the following characteristics： 1） taking advantage of three levels of automation, i.e. fully automated generalization, batch generalization, and interactive generalization, to undertake two types of processes, i.e. intelligent inference process and repetitive operation process in generalization; 2） making use of two kinds of sources for generalizing rule library, i.e. written specifications and cartographers＇ experiences, to define a six-element structure to describe the rules; 3） employing a hierarchical structure for map databases, logically and physically; 4） employing a grid indexing technique and undo/redo operation to improve database retrieval and object generalization efficiency. Two examples of topographic map generalization are given to demonstrate the system. It reveals that the system works well. In fact, this system has been used for a number of projects and it has been found that a great improvement in efficiency compared with traditional map general- ization process can be achieved.

关键词： map generalization system map database rule library topographic map

Design and simulation about a self-Tuning fuzzy-PID controller

在线全文

学校读者我要写书评

暂无评论

重庆邮电大学学报（自然科学版） 2009年第2期21卷 192-195,227页

作者： ZHANG Yi FU wen-yong LI yan-hua DENG hao-wen LIU Hong-chang Research Center of Intelligent System and Robotics Chongqing University of Posts and Telecommunications Chongqing 400065 P. R. China

Fuzzy logic has attracted the attention of structural control engineers during the last few years,because fuzzy logic can handle nonlinearities,uncertainties,and heuristic knowledge effectively and *** this paper,a self-Tuning fuzzy-PID control method which used the technology of the fuzzy control and PID control unified is *** techniques can visualize the results and processes for structure *** techniques will also provide convenience for engineers and users,and have high practical *** MATLAB simulation result shows that the system precision and the efficiency are very high and the static error is small,and robustness was also validated.

关键词： PID控制器模糊逻辑仿真结果自调整模糊PID控制设计 Matlab 启发式知识

Activation of adult endogenous neurogenesis by a hyaluronic acid collagen gel containing basic fibroblast growth factor promotes remodeling and functional recovery of the injured cerebral cortex

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2923-2937页

作者： yan Li Peng hao Hongmei Duan Fei hao wen Zhao Yudan Gao Zhaoyang yang Kwok-Fai So Xiaoguang Li Department of Neurobiology School of Basic Medical SciencesCapital Medical UniversityBeijingChina China Rehabilitation Science Institute China Rehabilitation Research CenterBeijing Key Laboratory of Neural Injury and RehabilitationBeijingChina Center of Neural Injury and Repair Beijing Institute for Brain DisordersBeijingChina Beijing Key Laboratory for Biomaterials and Neural Regeneration School of Engineering MedicineBeihang UniversityBeijingChina Guangdong-HongKong-Macao Institute of CNS Regeneration Ministry of Education CNS Regeneration Collaborative Joint LaboratoryJinan UniversityGuangzhouGuangdong ProvinceChina Bioland Laboratory(Guangzhou Regenerative Medicine and Health Guangdong Laboratory) GuangzhouGuangdong ProvinceChina Department of Ophthalmology and State Key Laboratory of Brain and Cognitive Sciences The University of Hong KongHong Kong Special Administration RegionChina Center for Brain Science and Brain-Inspired Intelligence Guangdong-HongKong-Macao Greater Bay AreaGuangzhouGuangdong ProvinceChina Co-innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina Department of Biomedical Engineering School of Biological Science and Medical EngineeringBeihang UniversityBeijingChina

The presence of endogenous neural stem/progenitor cells in the adult mammalian brain suggests that the central nervous system can be repaired and regenerated after ***,whether it is possible to stimulate neurogenesis and reconstruct cortical layers II to VI in non-neurogenic regions,such as the cortex,remains *** this study,we implanted a hyaluronic acid collagen gel loaded with basic fibroblast growth factor into the motor cortex immediately following traumatic *** findings reveal that this gel effectively stimulated the proliferation and migration of endogenous neural stem/progenitor cells,as well as their differentiation into mature and functionally integrated ***,these new neurons reconstructed the architecture of cortical layers II to VI,integrated into the existing neural circuitry,and ultimately led to improved brain *** findings offer novel insight into potential clinical treatments for traumatic cerebral cortex injuries.

关键词： adult endogenous neurogenesis basic fibroblast growth factor-hyaluronic acid collagen gel cortical remodeling functional recovery migration motor cortex injury neural circuits neural stem cells newborn neurons proliferation

Data-Driven Fault-Tolerant Bipartite Consensus Tracking for Multi-Agent Systems With a Non-Autonomous Leader

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 279-281页

作者： yan Zhou Guanghui wen Jialing Zhou Tao yang the Department of Systems Science Southeast University the State Key Laboratory of CNS/ATM Beijing Institute of Technology the Beijing Institute of Technology (Zhuhai) the State Key Laboratory of Synthetical Automation for Process Industries Northeastern University

Dear Editor,This letter studies the bipartite consensus tracking problem for heterogeneous multi-agent systems with actuator faults and a leader's unknown time-varying control input. To handle such a problem, the continuous fault-tolerant control protocol via observer design is developed. In addition, it is strictly proved that the multi-agent system driven by the designed controllers can still achieve bipartite consensus tracking after faults occur.

关键词： Time varying control systems

The influence mechanism of environmental factors on DGT adsorbing sulfonamides and the migration between water and sediment

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第5期151卷 347-359页

作者： Peng Zhang Jingfeng yan hao Ji Linke Ge yanying Li School of Environmental Science and Technology Shaanxi University of Science&TechnologyXi’an 710021China College of Environmental Sciences and Engineering Dalian Maritime UniversityDalian 116026China

Obtaining the sulfonamides(SAs)concentrations in the water body and sediment bulk was a prerequisite to reveal their transport and partitioning behavior in sediment-water environments and accurately assess their ecological *** the present study,the influences of multifactor interactions on the performance of o-DGTs with XAD-18 binding gels were analyzed by central combination experiments and response surfaces analysis,in which the target compounds were 9 *** results indicated that dissolved organic matter(DOM),pH,and suspended particulate matter(SS)had significant effects on the o-DGT sampling,whereas this o-DGT was independent of the ionic strength(IS).Concentning the composite influence of the four factors,the interaction between DOM and SS posed the most significant effect on all 9 SAs ***,an o-DGT and DIFSmodel was applied to explore the SAs migration between the water-sediments *** difference between desorption rate(k_(b))and adsorption rates(k_(f))values suggested that the kinetics of SAs was dominated by ***,the short-term sediment-water partitioning of SAs was clarified on the basis of distribution coefficient(K_(dl))for the labile SAs,among which the sulfadiazine(SDZ)had the largest labile *** ability of sediments to release SAs to the liquid phase as a sink was determined by response time(T_(c)).Among the 9 SAs,the longterm release of soseulfamethoxypyridazine(SMP)from the solid phase of sediments would have a potential risk to the aquatic environment,to which more attention should be paid in the future.

关键词： Sulfonamides O-DGT Water-sediments interface DIFS Distribution

Time-Varying Formation Tracking Control of Heterogeneous Multi-Agent Systems With Intermittent Communications and Directed Switching Networks

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

IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 294-296页

作者： Yuhan Wang Zhuping Wang hao Zhang Huaicheng yan the Shanghai Research Institute for Intelligent Autonomous Systems Tongji University the National Key Laboratory of Autonomous Intelligent Unmanned Systems the Frontiers Science Center for Intelligent Autonomous System of Ministry of Education the College of Electronic and Information Engineering the Department of Control Science and Engineering Tongji University the Key Laboratory of Advanced Control and Optimization for Chemical Processes of Ministry of Education the School of Information Science and Engineering East China University of Science and Technology

Dear Editor,This letter is concerned with the problem of time-varying formation tracking for heterogeneous multi-agent systems(MASs) under directed switching networks. For this purpose, our first step is to present so... 详细信息

关键词： Switches Topology Observers Formation control Event detection Switched systems Multi-agent systems Control theory Autonomous systems Stability

Catalytic production of high-energy-density spiro polycyclic jet fuel with biomass derivatives

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第2期101卷 760-768页

作者： wen-Jing Zhang yan-Cheng Hu yan-Hong Tan Jia Li Ning Li Jing-Pei Cao School of Chemical Engineering and Technology China University of Mining and Technology CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

High-energy-density（HED） fuel（*** used JP-10 and RJ-4）,featuring compact 3D polycyclic structure with high strain,is of critical importance for volume-limited military aircraft,since their high density and combustion heat can provide more propulsion *** reduce the reliance on petroleum source,it is highly desirable to develop renewable alternatives for the production of strained polycyclic HED fuel,but which remains a big challenge because of the inaccessibility caused by the high strain,We herein demonstrate a three-step catalytic route towards highly strained C17and C18spirofuel with biomass *** process includes catalytic aldol condensation of renewable cyclohexanone/cyclopentanone with benzaldehyde,catalytic spiro Diels-Alder（D-A） reaction of aldol adduct with isoprene,and catalytic *** key spiro D-A reaction is enabled by the catalysis of heterogeneous Lewis acidic ionic *** chloroaluminate IL,formed by benign urea and AICl3,exhibits good catalytic performance and reusability for this *** eventual hydrodeoxygenation（HDO）over Pd/C and H-Y produces strained tricyclic spirofuel with density>0.93 g/mL,combustion heat>41 MJ/L and freezing point <-40℃,which are better than the properties of tactical fuel ***,it is anticipated that the as-prepared renewable fuels have the potential to replace traditional petroleum-derived HED fuels.

关键词： Biomass derivatives Cycloaddition High-energy-density Lewis acidic ionic liquid Spiro polycyclic fuel

Heavy metal stress strengthens the stability and complexity of microbial molecular ecological networks in Sanyang wetland sediments

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2025年第1期43卷 103-118页

作者： Shengwei WU Huixi ZOU Nan LI Xiufeng yan wen LIU College of Life and Environmental Science Wenzhou UniversityWenzhou 325035China Institute for Eco-environmental Research of Sanyang Wetland Wenzhou UniversityWenzhou 325035China Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province School of Environmental&Resource SciencesZhejiang Agriculture and Forestry UniversityHangzhou 311300China

Pollution from heavy metals(HMs)(Cd,As,Cr,and Ni,etc.)has become a serious environmental issue in urban wetland ecosystems with more and more *** studies conducted in agricultural soils,rivers,and lakes demonstrated that microbial communities exhibit a response to HM ***,little is known about the response of microbial communities to HM pollution in urban wetland *** examined how heavy metals affect the stability of the microbial networks in the sediments of Sanyang wetland,wenzhou,*** environmental parameters,including HMs,TC(total carbon),TN(total nitrogen),TP(total phosphorus),S,and pH,varied profoundly between moderately and heavily polluted areas in shaping microbial ***,the microbial community composition in moderately polluted sites correlated significantly(P<0.05)with Ni,Cu,Cd and TP,whereas in heavily polluted sites,they correlated significantly with Cd,TN,TP,and *** show that the heavily polluted sites demonstrated more intricate and more stable microbial networks than those of the moderately polluted *** heavily polluted sites exhibited higher values for various network parameters including total nodes,total links,average degree,average clustering coefficient,connectance,relative modularity,robustness,and ***,the structural equation modeling analysis demonstrated a positive correlation between the stability of microbial networks and Cd,TN,TP,and S in heavily polluted ***,in moderately polluted sites,the correlation was positively linked to Cd,Ni,and sediment *** implies that Cd could potentially play a crucial role in affecting the stability of microbial *** study shall enhance our comprehension of microbial co-occurrence patterns in urban wetland ecosystems and offer insights into the ways in which microbial communities respond to environmental factors in varying levels of HM pollution.

关键词： heavy metal(HM) urban wetland microbial networks network stability

在线全文

学校读者我要写书评

暂无评论

移动APP多核架构安全漏洞并行检测

计算机技术与发展 2025年第2期35卷 79-85页

作者：严文昊王宏岩董蓓曲艺孙德艳国家电网有限公司客户服务中心天津300300 北京中电普华信息技术有限公司北京100031

移动APP多核架构的安全漏洞具有多样化、大规模特征,现有检测方法受限于参数选择适应性和特征提取的准确性,难以准确并行检测移动APP的多种漏洞。为了解决移动APP多核架构下大规模安全漏洞数据的准确检测问题,提出了一种基于SimHash算法... 详细信息

移动APP多核架构的安全漏洞具有多样化、大规模特征,现有检测方法受限于参数选择适应性和特征提取的准确性,难以准确并行检测移动APP的多种漏洞。为了解决移动APP多核架构下大规模安全漏洞数据的准确检测问题,提出了一种基于SimHash算法和LightGBM的移动APP多核架构安全漏洞并行检测方法。该方法利用SimHash算法对漏洞数据进行特征提取和编码。利用TF-IDF算法融合Jaccard指数改进SimHash算法,优化特征词的权重分配计算,生成唯一特征哈希值。结合LightGBM算法构建二分类器,判断漏洞是否存在可利用的EXP(漏洞利用代码)。利用贝叶斯超参数优化LightGBM算法,通过多核架构的并行处理,实现对大量漏洞数据的准确检测。通过实验表明,该方法针对多种常见漏洞的MAE值、RMSE值、MAPE值、R^(2)值分别为0.032、1.017、0.124%、0.976,有效提升了漏洞检测的适应性、精度、稳定性和拟合能力,为移动APP的安全管理提供了有力支持。

关键词： SimHash算法 LightGBM 移动APP 多核架构安全漏洞并行检测