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Search Results: 1 - 10 of 392627 matches for " <br>陈 欣 "
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Effects of sloping land use patterns on phosphorus loss in a micro-watershed of red soil area,Southern China
红壤小流域坡地不同利用方式对土壤磷素流失的影响

CHEN Xin,<br>
生态学报 , 2000,
Abstract: The study was conducted in a Paixichong micro watershed ecosystem of Deqing County,Zhejiang Province.The results obtained showed as follows:(1)Phosphorus loss varied obviously in different land use patterns.The order of phosphorus loss was bamboo field>upland field>newly exploited orchard>early tea plantation>China fir forest>waste grassland.(2)Particulate phosphorus(PP)was the major form of phosphorus loss with the run off.The average of PP in total phosphorus (TP)was 78 07% but varied with land use patterns.Dissolved phosphorus(DP)in total phosphorus(TP)in waste grassland,forested land and early tea plantation were 35.29%,31.49% and 27.65%,respectively,which were higher than other land use patterns.(3)The phosphorus loss seriously occurred in bamboo field,upland field and newly exploited orchard was attributed to the consistency of agricultural activities during the rainy season.
The Architecture of Federated Searching Engine and the Implementation of Search Agent in .NET Framework
.NET环境下跨库检索系统的设计与检索代理的实现

Chen Xin,<br>
现代图书情报技术 , 2004,
Abstract: Frequently a user's information needs are stored in the databases of multiple search platforms. It is inconvenient and inefficient for an ordinary user to invoke multiple databases and identify useful documents from the returned result. To support unified access to multiple databases, a federated searching engine can be constructed. This article presents a model of federated searching software component architecture, and introduces the implementation of search agent module in. Net framework.
The Cooperative Cache Techniques Used in PARFSNOW++
并行文件系统PARFSNOW^++中的协作式缓冲技术研究

Abstract,<br>赵,道蓄
计算机科学 , 2000,
Abstract:
Fault Detection Based on Parity Checks in Petri NetController
基于奇偶校验的Petri网控制器的故障检测

CHEN Lijuan,YANG Xin,<br>丽娟,
系统科学与数学 , 2009,
Abstract: A method of fault detection in Petri net controllers based on Parity checks is proposed. Firstly, Petri net controller satisfying linear constraints of marking and Parikh vectors is designed. Then, a redundant controller with certain places is constructed to meet the coding condition of Parity checks. Finally, for the differences between place fault and transition fault, different Parity check parameters are chosen to detect faults, some examples are given.
Review of the Researches in Cooperation in Social Dilemmas
两难中合作行为研究的回顾和展望

Chen Xin,Ye Haosheng,<br>,叶浩生
心理科学进展 , 2007,
Abstract: 如何预测人们将做出合作行为,是社会两难决策研究中重要的问题。该文回顾了社会两难研究的进展情况,包括社会两难的特征、来源、类型、研究方法和理论基础;综述了两难中影响合作行为的个人因素和情景因素,重点介绍了目前存在争议的制裁系统和合作的关系研究,以及为什么它们之间会表现出一些自相矛盾之处;对合作行为研究存在的问题进行了初步探讨,未来的研究将更侧重于合作决策的理论建构、文化内涵和认知过程的揭示。
An Expanded Characteristics-Mixed Finite Element Method for Quasilinear Convection-Dominated Diffusion Equations
拟线性对流占优扩散方程的扩展特征混合有限元方法数值模拟

CHEN Fengxin,CHEN Huanzhen,<br>
系统科学与数学 , 2009,
Abstract: An expanded characteristics-mixed finite element method for quasilinear convection-dominated diffusion equations is considered, here the characteristic approximation is to handle the convection part in time and the expanded mixed finite element spatial approximation is to deal with the diffusion part. The scheme is stable since fluid is transported along the approximate characteristics on the discrete level. The method expands the standard mixed finite element method in the sense that three variables are optimally and simulataneously treated: the scalar unknown, its gradient and flux. Theoretical analysis and numerical simulation that this method is stable and its $L^{2}$-error estimate is optimal.
THE STUDY OF FASTING AND EXHAUSTING OF ENERGY MATERIALS WITHIN NIGHT ON PYCNONOTUS XANTHORRHOUS (ANDERSON''''S BULBUL)
黄臀鹎禁食和夜间能量物质消耗的研究

Chen Xin Yang Lan,<br>,杨岚
动物学研究 , 1990,
Abstract: 本文报道分布于昆明地区的黄臀鹎Pycnonotus xanthorrhous在禁食和四季夜间能量物质——脂肪、蛋白质和糖的消耗情况。结果表明,在人为禁食条件下黄臀鹎的存活时间仅19小时,死亡时躯脂降低79%,去脂飞翔肌干重降低46%,肝糖降低96%。在夜间黄臀鹎消耗大量的储存脂肪,并以冬季的消耗量最大。肝糖提供的能量极少。在繁殖期和换羽期,储存的飞翔肌蛋白质在夜间大量分解以提供鸟体的需要。
Study on VRP based on improved ant colony optimization
基于改进蚁群算法的车辆路径优化问题研究

CHEN Ying-xin,<br>
计算机应用研究 , 2012,
Abstract: Logistics activities need to find different distribution node of the shortest path, to instruct the logistics vehicle scheduling, and then save the logistics cost. This paper proposed the solution of vehicle routing optimization problem. In order to conquer the defects and improve the basic ant colony optimization, it improved pheromones updating strategy, stimulating factor and the introduction of search hotspots, solved the defects of ant colony optimization effectively. With the help of Harbin city map as the prototype and the MATLAB software, it carried out simulation to check the improved ant colony optimization. The result verifies the feasibility and effectiveness of the improved ant colony optimization.
Research and Analysis of Game Theory Based Node Cooperation Strategies in Mobile Ad Hoc Networks
基于博弈的移动自组网协作策略研究与分析

CHEN Li-Xin,<br>
计算机系统应用 , 2010,
Abstract: With the aim at solving the problem of a selfish node refusing forward service requests of a mobile Ad hoc network, based on a Game theory in economics, this paper describes the method of identifying selfish nodes through detecting the cooperation rates of neighboring nodes and proposes statistics based on repeated Game strategies LTFT and LEpTFT. Also, the paper proposes a rule of adopting different strategies according to different aims of cooperation. Analysis shows that the strategies and rule can effectively encourage cooperation and punish selfishness to solve network problem and nodes to benefit from tradeoffs.
Separation and Determination of Capsanthin in Paprika Red Pigments with Thin-Layer Chromatography
薄层色谱法分离测定辣椒红色素中的辣椒红

Ding Laixin,Chen Li,<br>丁来,
色谱 , 1995,
Abstract: 薄层色谱法分离测定辣椒红色素中的辣椒红丁来欣,陈里(南京理工大学化工学院南京210014)1前言辣椒红色素是从红辣椒中提取的一种天然色素,系多种成分的混合物[1],其主要成分之一是辣椒红。辣椒红属于类胡萝卜素,是维生素A的前体,对人体健康起重要作用,...
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