“顺”字本义考

许慎在《说文解字》中释“顺”为“理也”,当为“顺”之引申义,“顺”之本义应为“合乎自然次序”。依据有三：第一,参照“顺”的古文形体,比合“川”、“页”两意,可推求“顺”之本义;第二,“顺”之本义在古代文献资料中用例颇多,现代方言俗语亦可佐证;第三,“顺”的这一本义是其整个词义系统的源头和总纲。     

玉米须水煮液乙醚萃取物化学成分的研究

用乙醚对玉米须水煮液进行萃取,再利用气相色谱质谱联用仪进行成分分析,然后用谱峰面积归一化法测定各组分相对含量,结果共鉴定出23种化学成分,其中主要的化学成分有:邻二甲苯(含量为15.02%)、对二甲苯(含量为11.93%)、对乙烯基苯乙醚(含量为17.12%)、4,4-二甲基-1-氰基环已醇(含量为15.29%),(3反)-4-甲硫基丁烯基异氰酸酯。     

基于MAS的混合智能故障诊断模型研究

针对复杂设备故障的复杂性和不确定性等特点,以起重设备为研究对象,提出了一种基于多Agent的混合智能故障诊断模型,并构建了模型的诊断工作过程及每一功能Agent的内部结构和功能。模型根据各子系统并行感知外界环境,动态地组建Agent诊断组,共同完成诊断任务。最后,通过实例验证了模型的有效性。该模型在某企业的设备远程维护平台应用中,能快速、准确地进行故障成因分析,并给出合理的决策意见,提高了设备的安全运行效率。     

Risk assessment based on fault tree analysis for damaged pipe repair during operation in petrochemical plant

In petrochemical plant, the in-operation repairing is usually a repairing strategy with pressured inoperation repairing for avoiding huge economic losses caused by unplanned shutdown when some slight local leakage happens in pipes. This paper studies the effects of repairing strategies on the failure probability of the pipe systems in process industries based on the time-average fault tree approach, especially the in-operation repairing strategies including pressured in-operation repairing activities. The fault tree model can predict the effect of different repairing plans on the pipe failure probability, which is significant to the optimization of the repairing plans. At first pipes are distinguished into four states in this model, i.e., successive state, flaw state, leakage state and failure state. Then the fault tree approach, which is usually applied in the studies of dynamic equipment, is adopted to model the pipe failure. Moreover, the effect of pressured in-operation repairing is also considered in the model. In addition, this paper proposes a series of time-average parameters of the fault tree model, all of which are used to calculate node parameters of the fault tree model. At last, a practical case is calculated based on the fault tree model in a repairing activity of pipe thinning.     

Improving Writing Skills of Thai EFL Students by Recognition of and Compensation for Factors of L 1 to L2 Negative Transfer

In this study, we examined the likelihood of a TAME （extended technology acceptance model）, in which the interrelationships among computer self-efficacy, perceived usefulness, intention to use and self-reported use of computer-mediated technology were tested. In addition, the gender- and age-invariant of its causal structure were evaluated. The data were collected from a self-reported questionnaire administered to 477 administrative staff of a public university in Malaysia. The results of structural equation modeling supported the adequacy of TAME. Although the TAME＇s causal structure was applicable to both male and female staff, age group appeared to moderate the structural relationships among the constructs of interest.     

基于SOA的高校信息系统集成研究

研究了SOA的基本概念和体系结构,分析了将Web Service作为SOA实现技术的不足之处,阐明了SCA/SDO编程模型的优势,并针对高校信息化建设的现状,提出了基于SCA/SDO编程模型,对高校信息系统进行集成的SOA架构模型。     

CFD simulation of micro-particle trapping under water tweezers

In early research, capture and manipulation of particles were mainly achieved by means of light, electricity and plasma in micro-fabficaton and micro-assembly. A new method is proposed using micro-water jet to form water tweezers to capture solid particles and implement position control of micro-particles. This paper analyzes the basic prin- ciple of water tweezers, and the discrete element method and smoothed particle hydrodynamics method are employed to establish a solid-liquid coupling model used in analyzing the trapping mechanism. A flow field model is set up to simulate dynamic characteristic of water tweezers based on computa- tional fluid dynamics （CFD）. Selection of boundary conditions, initial guess, solver control and convergence strategies of the model are discussed. Velocity and pressure of streamline are predicted and discussed under certain input conditions. Simu- lation results demonstrate that it is an efficiently theoretical method to eventually trap solid particles by water tweezers.     

黄遵宪与张之洞之关系考论

一般人只关注到张之洞三次保荐黄遵宪,据此认为两人关系亲密,其实黄遵宪与张之洞积怨甚深,且其来有自。俩人的矛盾,表面上看是由一个个具体事件和不同的个性引起的,但本质上是黄遵宪的维新思想与张之洞的中体西用思想的矛盾。对俩之关系,略作考述。     

湖北襄阳方言中表比较义的介词“赶”

＂赶＂字作介词表示比较义是湖北襄阳方言的一个特色。其结构形式可分为平比、差比和不及三种形式。在普通话中＂赶＂字没有做介词表示比较的用法,古汉语书面文献中也鲜有存在。文章认为是由＂追赶、驱逐＂之义引申而来。