桥梁与人类文明的关系

从桥梁与人类文化历史的关系、桥梁与人类对材料的使用和创造的关系、桥梁与科学技术的关系等方面叙述了人类文明的成果与桥梁的关系 ,认为桥梁对于人类文明的意义已经远远超过了其本身的意义 ,成为人类文明程度的标志     

技术的社会建构：理论探索与政策含义

技术的社会建构论以建构主义为思想基石,聚焦于考察技术被建构的过程。在该理论框架中,技术被界定为社会行动,从而消解了传统的“人—机”二元论,而走向一种“可塑因—不可塑因”的新二分法;技术的结构即是围绕技术的社会行动结构,各个行动者之间的权力分布和互动关系可运用网络方法加以分析;技术发展是一个建构的演化过程,其动力源自于各类行动者的建构作用,多样性源自于各类行动者的异质性,行动者之间的协商构成了选择环境;社会建构论包含一种建构论的政策思想,强调政策干预的持续性、地方性以及政策决策民主化。     

突出地域特色的植物科学与技术专业教学改革

培养富有创新精神和开拓能力,理论坚实并具有现代植物生产技能,能够献身生态重建和区域农业发展的应用型高级技术人才。以此作为专业教学改革的基础目标,通过教师队伍素质和水平培养提高,着力相关课程改革,坚持理论教学面对区域农业发展实际,跟踪农业技术发展前沿,强化具有就业市场竞争能力的专业技能培养,通过办学条件的改善,使富有地域特色的专业教学改革取得初步而又明显的成效。     

存储区域网络iSCSI协议的通信机制研究

介绍了存储区域网络主要采用的组网协议,包括FC协议、FCIP协议、iFCP协议和iSCSI协议,着重研究了一种利用TCP/IPI网组建存储区域网络的协议-iSCSI协议,分析了iSCSI协议的通信机制,比较了在IP网络上实现iSCSI协议通信的3种方法,开发了一种iSCSI协议数据单元与TCP数据帧间的接口算法及其硬件设计,并用 VHDL语言成功进行了行为级的仿真。     

Factor analysis for ranked data with application to a job selection attitude survey

Summary.  Factor analysis is a powerful tool to identify the common characteristics among a set of variables that are measured on a continuous scale. In the context of factor analysis for non-continuous-type data, most applications are restricted to item response data only. We extend the factor model to accommodate ranked data. The Monte Carlo expectation–maximization algorithm is used for parameter estimation at which the E-step is implemented via the Gibbs sampler. An analysis based on both complete and incomplete ranked data (e.g. rank the top q out of k items) is considered. Estimation of the factor scores is also discussed. The method proposed is applied to analyse a set of incomplete ranked data that were obtained from a survey that was carried out in GuangZhou, a major city in mainland China, to investigate the factors affecting people's attitude towards choosing jobs.     

基于移动代理的新型IDS维护更新机制设计

提出了一种基于移动代理的新型分布式入侵检测系统。该系统是针对广域网环境专门设计的,数据的处理通过各节点所设置的代理来进行分布式计算,不仅能实现全网络范围内的入侵检测功能,具有良好的可移植性;而且对网络系统和主机的资源占用较低,减少了出现网络瓶颈的可能。还建立了移动代理的新型分布式入侵检测系统的体系结构和理论分析模型,并讨论了该系统的维护更新机制。     

Marginal and association regression models for longitudinal binary data with drop‐outs: A likelihood‐based approach

Longitudinal data often contain missing observations, and it is in general difficult to justify particular missing data mechanisms, whether random or not, that may be hard to distinguish. The authors describe a likelihood‐based approach to estimating both the mean response and association parameters for longitudinal binary data with drop‐outs. They specify marginal and dependence structures as regression models which link the responses to the covariates. They illustrate their approach using a data set from the Waterloo Smoking Prevention Project They also report the results of simulation studies carried out to assess the performance of their technique under various circumstances.     

技术自主论思想溯源

技术自主论最初的思想源头可以追溯到万物有灵论.马克思的技术异化思想是技术自主论的一个思想来源,马克思考察的劳动的异化内在地包含着技术的异化.20世纪的学者从不同的角度阐发了技术自主的思想.技术自主论的产生有其深刻的社会历史根源,社会发展到今天已成为技术化的社会,技术化社会中的人的生存是一种技术生存,技术是人的天命,技术自主论不过是以迂回的形式揭示了人与技术的这种关系.     

基于3C的TBI绩效评价指标体系初探

对TBI绩效评价的研究,应放在对作为TBI母系统的科技中介的绩效评价研究的大框架下来考虑.科技中介绩效评价研究的意义集中体现在对科技中介发展评价指标的研究方面.科技中介绩效评价指标体系的设计依据、设计原则及必含指标,同样适用于TBI的绩效评价.归纳分析我国TBI绩效评价研究的现状可知,存在着研究不深入、绩效指标体系建立不完整等问题.基于"3C"的TBI绩效评价理论体系的提出,能够使现存的问题得以有效的解决.     

A note on interval‐censored lifetime data and the constant‐sum condition of oiler,gómez & calle (2004)

Oiler, Gomez & Calle (2004) give a constant sum condition for processes that generate interval‐censored lifetime data. They show that in models satisfying this condition, it is possible to estimate non‐parametrically the lifetime distribution based on a well‐known simplified likelihood. The author shows that this constant‐sum condition is equivalent to the existence of an observation process that is independent of lifetimes and which gives the same probability distribution for the observed data as the underlying true process.