检索结果-南通市图书馆

Application of LIBS Technology to the Rapid Measure of Mineral elements in Gannan Navel orange

在线全文

cnki会议

学校读者我要写书评

暂无评论

Application of LIBS Technology to the Rapid Measure of Miner...

2011 International Conference on computer, Electrical, and Systems sciences, and engineering (CESSE 2011)

作者： Tianbing Chen, MingyinYao, Muhua Liu Optics-Electrics Application of Biomaterials lab,College of engineering, Jiangxi Agricultural university, Nanchang, P. R. China

laser-induced breakdown spectroscopy (LIBS) was applied to measure the mineral elements in Gannan navel orange .In the work, the LIBS spectra were collected by LIBS experimental setup in pericarps and *** typical spectrum lines of mineral elements K(766.489nm,769.896nm),ca(393.378nm,396.849nm), Mg(279.579nm,280.329nm,285.259nm) and Si(251.611nm,288.158nm) were chosen and identified,and the relative content of four elements were compared and analyzed respectively in pericarps and fleshes .The results showed that the relative intensity of K and ca were higher in fleshes than in pericarps, while the relative intensity of Mg and Si were lower in fleshes than in *** experimental results also showed that LIBS technique is a fast and effective means for measuring mineral elements in fruit samples. .

关键词： LIBS, Gannan Navel orange, Mineral elements, Pericarps and fleshes.

在线全文

cnki会议

学校读者我要写书评

暂无评论

网络中的异向签名技术分析

新疆石油学院学报 2003年第3期15卷 73-75页

作者：王东新疆财经学院计算机系新疆乌鲁木齐830012

数字签名、数字认证和数字信用卡等都是流行的安全认证技术 ,公钥和私钥加密技术虽然已经确保了传输过程中的安全问题 ,但是 ,这种简单的认证不能有效地防止当事者的舞弊行为。本文将讨论一种防止当事者的舞弊行为的认证方法 ,简称异向... 详细信息

数字签名、数字认证和数字信用卡等都是流行的安全认证技术 ,公钥和私钥加密技术虽然已经确保了传输过程中的安全问题 ,但是 ,这种简单的认证不能有效地防止当事者的舞弊行为。本文将讨论一种防止当事者的舞弊行为的认证方法 ,简称异向签名技术。

关键词： ca 数字证书数字签名异向签名

Pivot Selection Methods Based on Covariance and Correlation for Metric-space Indexing

在线全文

学校读者我要写书评

暂无评论

Pivot Selection Methods Based on Covariance and Correlation ...

2012 National Conference on Information Technology and computer science

作者： Kewei Ma,Yuanjun Liu,Honglong Xu,Pang Yue,Fuli Lei,Sheng Liu,Rui Mao Guangdong Key laboratory of Popular High Performance computers Shenzhen Key laboratory of Service Computing and Applications Shenzhen university Shenzhen,China Jiaxin Han Oracle Corporation Redwood City,ca,usa

Metric-space indexing is a general method for similarity queries of complex *** quality of the index tree is a critical factor of the query *** a metricspace indexing tree can be represented by two recursive steps,pivot selection and data partition,while pivot selection dominants the quality of the index *** heuristics,based on covariance and correlation,for pivot selection are *** results show that their performance is superior or comparable to existing methods.

关键词： similarity query metric-space indexing pivot space model pivot selection

在线全文

cnki会议

学校读者我要写书评

暂无评论

Linux下IPsec的实现

计算机工程与应用 2002年第11期38卷 157-159页

作者：王张宜陈幼雷张焕国武汉大学计算机科学与技术学院武汉430072

IPsec作为网络层的安全协议套件,是实现VPN的重要途径。在Linux系统下通过对网络部分代码的修改,可便捷地实现IPsec协议。该文结合笔者在Linux系统下实现IPsec的实践,描述了IPsec系统的基本结构和实现过程。

关键词： IPsec协议 Internet 安全协议套件安全联盟 Linux

慢性捆绑应激致大鼠学习记忆受损及海马神经元突触素和突触后致密物95表达的变化

在线全文

学校读者我要写书评

暂无评论

华中科技大学学报（医学版） 2003年第4期32卷 367-370页

作者：廖敏刘能保张敏海李宏莲刘少纯刘向前张伟华中科技大学同济医学院基础医学院解剖学系武汉430030

目的　了解慢性捆绑应激对大鼠学习记忆能力的影响及可能的神经解剖学机制。方法　将大鼠分为应激组和正常对照组 ,应激组大鼠每天捆绑 6h共 2 1d ,然后用Y迷宫对 2组大鼠进行行为检测 ,运用免疫组织化学方法 ,观察 2组大鼠海马突触素... 详细信息

目的　了解慢性捆绑应激对大鼠学习记忆能力的影响及可能的神经解剖学机制。方法　将大鼠分为应激组和正常对照组 ,应激组大鼠每天捆绑 6h共 2 1d ,然后用Y迷宫对 2组大鼠进行行为检测 ,运用免疫组织化学方法 ,观察 2组大鼠海马突触素和突触后致密物 95 (PSD 95 )的表达 ,并用计算机图像分析仪对免疫反应结果进行处理。结果　应激组大鼠学习记忆能力明显受损 (P ca3 区突触素和PSD 95免疫阳性产物较对照组明显减少 (P 1)。结论　慢性捆绑应激致大鼠学习记忆受损可能与其海马神经元突触素和PSD 95的表达减少有关。

关键词：学习记忆慢性捆绑应激突触素突触后致密物95 海马

DDPRMA: A Dynamic Distributed PRMA for Distributed Wireless Networks

在线全文

学校读者我要写书评

暂无评论

DDPRMA: A Dynamic Distributed PRMA for Distributed Wireless ...

2010 3rd IEEE International Conference on computer science and Information Technology—ICCSIT 2010

作者： Zhu Shi-ding Automobile Management Institute Bengbu China 233011 Nie Jing-nan Member IEEE Pla university of science and Technology Nanjing China 210007 Yan Ming-sheng Automobile Management Institute Bengbu China 233011

Based on the distributed wireless networks, this paper proposes a new MAC mechanism protocol （DDPRMA） which could support voice and data transmitting together. First, we describe the protocol in the way of finite states diagram. Then the mathematic model has been built to analyze the DDPRAM performance. Finally the mechanism compared with the CSMA/ca mechanism. Simulation results show that the performance of DDPRMA is more suitable than the caMA/ca for voice traffic.

关键词： MAC mechanism distributed wireless networks CSMA/ca

基于Java和XML的系统生物学可视化建模系统

在线全文

cnki会议

学校读者我要写书评

暂无评论

计算机工程与应用 2004年第6期40卷 202-204页

作者：董建坤鲁强骆清铭曾绍群华中科技大学生物医学光子学教育部重点实验室武汉430074

论文讨论了用系统生物学建模语言描述生化反应和基因调控网络模型的方法,设计并实现了系统生物学建模系统BioDesigner。最后利用BioDesigner有效地描述了最小钙振荡模型,并用仿真软件验证了模型的正确性。

关键词：系统生物学 Java XML

亚急性乙醇中毒致小鼠记忆障碍的脑内突触机制

在线全文

学校读者我要写书评

暂无评论

卫生毒理学杂志 2002年第4期16卷 203-205页

作者：徐晓虹徐晓燕浙江师范大学生物与环境科学学院浙江金华321004 浙江省永康市卫生防疫站

目的　探讨亚急性乙醇中毒导致小鼠记忆障碍的脑内突触机制。方法　用新鲜配制体积分数为 3 0 %的乙醇溶液按 10ml kg剂量分别灌胃染毒 1、7和 2 8d ,用Y 迷宫检测小鼠分辨学习记忆行为的变化 ,用紫外分光光度计和荧光分光光度计分别检... 详细信息

目的　探讨亚急性乙醇中毒导致小鼠记忆障碍的脑内突触机制。方法　用新鲜配制体积分数为 3 0 %的乙醇溶液按 10ml kg剂量分别灌胃染毒 1、7和 2 8d ,用Y 迷宫检测小鼠分辨学习记忆行为的变化 ,用紫外分光光度计和荧光分光光度计分别检测脑组织超氧化物歧化酶 (SOD)、脂褐素生化指标 ;用电镜和计算机图像分析仪观测小鼠海马ca3区GrayⅠ型突触界面结构参数的变化。结果　一次性乙醇染毒对小鼠学习记忆无影响 ;连续 7d乙醇染毒 ,使小鼠Y 迷宫分辨学习能力下降 ,3 0min记忆保持率下降 ,但 2 4h记忆无明显变化 ,脑SOD活性下降 ,海马突触界面结构无明显变化 ;连续 2 8d乙醇染毒 ,小鼠学习和记忆均明显减退 ,脑组织SOD的活性显著降低 ,脂褐素积累增加 ;同时海马突触后致密物质 (PSD)厚度显著减小 ,突触间隙显著增宽。结论　亚急性乙醇中毒致小鼠学习记忆功能障碍与其降低脑组织抗氧化能力。

关键词：乙醇中毒学习记忆超氧化物歧化酶脂褐素突触界面结构亚急性乙醇中毒记忆障碍脑内突触机制

Influence of Knowledge Management on learning drives: A sustainable innovation

在线全文

学校读者我要写书评

暂无评论

Influence of Knowledge Management on learning drives: A sust...

The 2nd International Conference on computer science and Information Technology(ICCSIT’2012);The 2nd International Conference on Electrical,Electronics and Civil engineering(ICEECE’2012);The 2nd International Conference on Mechanical,Production and Automobile engineering(ICMPAE’2012);The 2nd International Conference on Humanities,Geography and Economics(ICHGE’2012);The 2nd International Conference on Chemical,Ecology and Environmental sciences(ICCEES’2012);The 2nd International Conference on Medical,Biological and Pharmaceutical sciences(ICMBPS’2012)

作者： S.K.Chawla ca Sachchidanand Pachori sanghvi Institute of Management and science

Knowledge Management （KM） is the next stage in the evolution of organizational transformation strategies. Total Quality Management, Business Process Re-engineering, Learning practices are the ingredients of knowledge management to strategize the organizational learning. Efforts to implement these strategies brought about the realization that a knowledge perspective is a requirement for competing in the challenging environment. Knowledge management may have different meaning depending on whether the perspective is coming from Operations, Organizational Development, Information Technology, or Finance. Knowledge management efforts typically focus on organizational vision such as improved performance, competitive advantage, innovations, sharing of learned lessons ＆ continuous learning resulting in sustaining of organizational effectiveness. There can be a distinguished focus on the management of knowledge as a strategic asset and a focus on encouraging the sharing of knowledge. KM efforts can help individuals and groups to share valuable organizational insights, to reduce redundant work, to avoid reinventing the wheel, to reduce training time for new employees, to retain intellectual capital as employees turnover in an organization, and to adapt to changing environments and markets （Mcadam ＆ McCreedy 2000）（Thompson ＆ Walsham 2004）. This paper is an attempt to study the drivers of knowledge management as motivation. As knowledge management programs can often lead to greater innovation, better customer experiences, consistency in good practices, knowledge access across a global organization, and other organizational benefits.

关键词： Organizational Learning Sustaining Of Organizational Effectiveness Innovation.