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Search Results: 1 - 10 of 155384 matches for " 文军 "
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中国五加科木怱木属一些分类群的订正

植物分类学报 , 2000,
Abstract: 在全面修订五加科木忽木属的基础上.对中国木忽木属几个有问题的种,即A . chinensis L.,A.de- caisneana Hanece,A.elata(Miq.)Seem.,A.stipulata Franch.,A.dasyphylloides J.Wen,A. thomsonii Seem. ex Clarke,A.vietnamensis Ha,A.foliolosa(Wall.)Seem.,A.armata(Wall .ex Don)Seem.,A. finlaysoniana(Walli.ex Don)Seem.和A.debilis J.Wen进行了讨论,井对若于名称作了异名处理。
“被市民化”及其问题——对城郊农民市民化的再反思

华东师范大学学报(哲学社会科学版) , 2012,
Abstract: 从农民到市民是长期以来许多中国农民梦寐以求的愿望,然而在当代中国,随着工业化和城市化的不断推进,城市郊区农民的市民化却逐渐成为一种“问题化”了的现象。究其原因,主要在于郊区农民市民化的过程是一种完全被制度化安排的“被市民化”的过程,这种被市民化的结果既会给新市民群体带来许多困境,也很容易引发新的城乡冲突与潜在社会危机。因此,有必要对这一“农民被市民化”过程中的新型中国城乡关系及其问题进行反思,并寻求相关解决之道。
“城市社会与文化研究”栏目主持人语

华东师范大学学报(哲学社会科学版) , 2015,
Abstract:
网络社会的病症及网络社会问题的社会学分析

科技导报 , 2002,
Abstract: 一、网络社会与网络社会问题的滋生从1969年11月21日,在加利福尼亚大学洛杉矶分校的计算机实验室的一台计算机与远在千里之外的斯坦福研究所的另一台计算机联通开始,揭开了人类网络社会的序幕。今天,电子网络可以说已经成了人们社会生活中不可或缺的重要组成部分。尤其是近一二十年来,随着全球电子技术的迅猛发展和不断普及,原先仅存在于科学家或计算机从业人员之间交流的网络,现在已成为普通人日常交往的一种方式了。以国际互联网为例,从1995年到2000年5年间,全球互联网商业市场正以624%的年增长率发展,用户数从3000万猛增至55亿。
从生存理性到社会理性选择:当代中国农民外出就业动因的社会学分析

社会学研究 , 2001,
Abstract: 无
药用植物类异戊二烯代谢途径及其活性产物合成调控研究进展
Recent Research on Isoprenoid Biosynthetic Pathway and Metabolic Regulation of Functional Isoprenoids in Medicinal Plants
 [PDF]

王秋, 张犇, 王剑
Botanical Research (BR) , 2012, DOI: 10.12677/BR.2012.12004
Abstract: 植物类异戊二烯化合物是一类具有多种药理活性的天然产物,其生物合成主要通过甲羟戊酸途径与2C-甲基-4-磷酸-4D-赤藓糖醇途径,对这两条途径的调控研究已成为近年来热点之一。本文就近年来植物类异戊二烯代谢途径的研究进展以及相关活性成分的生物合成调控研究做一综述。
Isoprenoids originally from medicinal plants are natural products of diverse bioactivities. Isopre-noids were synthesized in plants via the mevalonate (MVA) pathway and the 2-C-methyl-D-erythritol-4- phosphate (MEP) pathway whose regulation mechanisms are research hotspots in recent years. This article gives a summary of recent explorations on isoprenoid biosynthetic pathway and metabolic regulation of func-tional isoprenoids in medicinal plants.
对一个环Zn上圆锥曲线数字签名的分析与改进
Analysis and Improvement of a Digital Signature Based on Conic Curve over Zn
 [PDF]

, 杨先
Software Engineering and Applications (SEA) , 2012, DOI: 10.12677/SEA.2012.12008
Abstract:

杨慧等人基于环Zn上的圆锥曲线构造了一个ElGamal型数字签名方案,文章分析指出,该方案的私钥可以从公钥和签名中恢复出来,因而该签名方案是不安全的。对杨慧等人的签名方案进行了改进,通过分析可知改进方案能够抵抗密钥恢复攻击。基于改进数字签名方案构造了一个多重数字签名方案,该多重数字签名方案无需进行多次交换数据以获得同一个参数,减少了通信量。

Under the analyses of an ElGamal digital signature scheme based on conic curve over Zn proposed by Yang Hui et al., this paper reveals that the secret key can be gained by the public key and the signature, so Yang et al.’s scheme is not security. An improved digital signature scheme is given, and it can resist the secret key gaining attack. Moreover, a multi-signature digital scheme is supplied based on the improved digital signature scheme. The multi- signature digital scheme has the advantage not to exchange many times among singers to get the same parameter, and therefore reduces the communication traffic.

 

基于粗糙集与模糊集理论的图书馆最优选书算法
An Optimal Algorithm of Selection Books in Library Based on Rough Set and Fuzzy Set
 [PDF]

赵利萍,
Computer Science and Application (CSA) , 2012, DOI: 10.12677/CSA.2012.25048
Abstract: 本文将粗糙集理论与模糊集理论结合起来给出一种图书馆最优选书算法。该算法首先从已知数据的初始信息系统出发计算各选书方案之间的相似度,从而构造相似矩阵然后根据相似矩阵的传递闭包对各方案进行聚类,并根据粗糙集理论求各属性重要性最后利用加权综合的思想及最小距离方法选择最优买书方案。
Combining rough set and fuzzy set theory, an optimal decision algorithm of library to select books is put forward. During this algorithm, firstly, we construct the similarity matrix from the original information system; secondly, we classify all the programs according to fuzzy clustering; thirdly, an algorithm to choose the optimal program is put forward according to the minimum distance of weighted relative deviation.
ICU内气管插管患者非计划性拔管的原因分析和干预措施
Current Situation of Preventive Management for Unplanned Endotracheal Extubation in ICU
 [PDF]

彭琳, 赵越,
Nursing Science (NS) , 2014, DOI: 10.12677/NS.2014.34018
Abstract:
文章综述了ICU气管插管患者发生非计划性拔管的原因(包括患者因素、医护因素和其他因素),并提出相应防范策略(包括加强业务培训、建立防范制度、加强护患沟通、规范医护操作、强化日常护理、加强人力配置和及时拔管),旨在为临床规范气管插管患者管理提供参照,提高机械通气治疗的安全性和患者舒适度,从而确保患者生命安全。
The causes of unplanned endotracheal extubation in ICU included factors of patients themselves, medical staffs as well as others. According to the reasons, it is necessary to reinforce training, establish prevention strategies, strengthen communication between nurses and patients, standardize clinical operations, improve nursing daily quality, allocate manpower properly and extubate timely to provide clinical references, at the same time, increase the security and comfort in patients with mechanical ventilation and ensure patient safety.
湖南省农业经济增长的动态面板分析
Dynamic Panel Analysis of Hunan Agricultural Economic Growth
 [PDF]

周路,
World Economic Research (WER) , 2015, DOI: 10.12677/WER.2015.44008
Abstract:
基于1988~2012年湖南省14个市州动态面板数据,运用广义矩估计GMM方法,对湖南省农业经济增长的影响因素进行实证研究。研究发现,前一期的农业经济、农作物播种面积、农业机械总动力和化肥施用量对农业经济增长有着显著的正向促进影响。有效灌溉面积和农业劳动力人数对农业经济增长具有负向影响。在此基础上,就促进湖南省农业经济增长提出了政策建议。
Based on dynamic panel data of 14 regions in Hunan Province from 1988 to 2012 and by applying the method of GMM estimation, this paper conducts an empirical study of the impact of Hunan agricultural economic growth. The result identifies that the former agricultural economic growth, the agricultural crop sown area, the total power of agricultural machinery and fertilizer input have a positive function of agricultural economic growth; while agricultural labor and effective irrigate area have a negative impact. On this basis, this paper puts forward policies to improve the growth of agricultural economy.
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