从语言文化角度谈郦道元“酷吏”说

郦道元在《魏书》中被列入酷吏一列,后人多认为是由于郦氏实行暴政和魏收人品等原因造成。从＂酷吏＂一词的语言文化角度看,应该是＂严正冷酷＂之吏,而不是＂残暴＂之吏,郦氏并非后人认为的暴吏,魏收亦没有丑化郦道元人物形象。     

Kinetic study on the reaction between CO2-CO and wustite using the isotope exchange method

To investigate the reaction between CO₂-CO and wustite using the isotope exchange method at 1073, 1173, 1273, and 1373 K, the experiment apparatus was designed to simulate the fluidized bed. The chemical rate constant was estimated by considering the effect of gas phase mass transfer on the reaction. It is found that the chemical rate constant is inversely decreased with the increase in the ratio of CO₂/CO by volume. The activation energy of reaction is in a linear relationship with the ratio of CO₂/CO by volume, and the average activation energy is 155.37 kJ/mol.     

New anomalocardid frontal appendages from the Guanshan biota, eastern Yunnan

Anomalocaridids were large predators of the Cambrian seas at the top of the trophic pyramid. Complete anomalocaridid specimens have been rarely discovered and the rigid isolated frontal appendages and mouthparts are more commonly preserved. Here we study new material of the frontal appendages from the Wulongqing Formation, Cambrian Stage 4, Series 2 near Kunming, eastern Yunnan. Two new forms of anomalocaridid frontal appendages are described, namely Anomalocaris kunmingensis sp. nov. and Paranomalocaris multisegmentalis gen. nov., sp. nov. The frontal appendage of A. kunmingensis sp. nov. probably comprises 15 podomeres of which the first one has a weakened skeletoned, the second one is armed with small spines, and the third one is armed with remarkably robust proximal ventral spines with 6 anisomerous auxiliary spines; paired auxiliary spines are associated with podomeres 4–14; podomeres 12–14 are armed with paired dorsal spines, and the last podomere bears 2 distal spines, one spine distinctly larger than the other. The frontal appendage of P. multisegmentalis tapered backwards, consisting of 22 visible podomeres; the most ventral spine is armed with 5 pairs of auxiliary spines, and podomeres 12–21 bear dorsal spines, the last podomere with 2 small distal spines. The new material provides additional evidence for our understanding of the diversity of anomalocaridids in the Cambrian. The morphology of these new finds may indicate the importance of different feeding strategies of anomalocaridids in the Cambrian ecosystem.     

Retail default prediction by using sequential minimal optimization technique

This paper employed sequential minimal optimization (SMO) to develop default prediction model in the US retail market. Principal components analysis is used for variable reduction purposes. Four standard credit scoring techniques—naïve Bayes, logistic regression, recursive partitioning and artificial neural network—are compared to SMO, using a sample of 195 healthy firms and 51 distressed firms over five time periods between 1994 and 2002. The five techniques perform well in predicting default particularly one year before financial distress. Furthermore, the prediction still remains sound even 5 years before default. No single methodology has the absolute best classification ability, as the model performance varies in terms of different time periods and variable groups. External influences have greater impacts on the naïve Bayes than other techniques. In terms of similarity with Moody's ranking, SMO excelled over other techniques in most of the time periods. Copyright © 2008 John Wiley & Sons, Ltd.     

单-6-叠氮-β-环糊精与苯乙炔的点击化反应

利用CuI/NBS这种新型催化体系来促进单-6-叠氮-β-环糊精与苯乙炔之间的偶联反应,通过这个多组分反应可以高效地以炔和叠氮为原料一锅法制备5-碘代-1,4-取代-1,2,3-三氮唑类化合物.     

班级管理中暗示的妙用

在班级管理中,采用"暗示法"对学生不产生心理压力,不强求学生接受,但能产生积极的、主动的影响,起到潜移默化的作用.     

Proteome changes in the plasma of Papilio xuthus (Lepidoptera: Papilionidae): effect of parasitization by the endoparasitic wasp Pteromalus puparum (Hymenoptera: Pteromalidae)

Although the biochemical dissection of parasitoid-host interactions is becoming well characterized, the molecular knowledge concerning them is minimal. In order to understand the molecular bases of the host immune response to parasitoid attack, we explored the response of Papilio xuthus parasitized by the endoparasitic wasp Pteromalus puparum using proteomic approach. By examining the differential expression of plasma proteins in the parasitized and unparasitized host pupae by two-dimensional (2D) electrophoresis, 16 proteins were found to vary in relation to parasitization compared with unparasitized control samples. All of them were submitted to identification by mass spectrometry coupled with a database search. The modulated proteins were found to fall into the following functional groups: humoral or cellular immunity, detoxification, energy metabolism, and others. This study contributes insights into the molecular mechanism of the relationships between parasitoids and their host insects.     

企业员工的同化管理——浅谈传化集团的员工培训

在竞争日趋激烈的知识经济时代，企业职工时本企业文化的理解与认同越发显得重要。文章从企业文化的内涵入手，通过分析传化集团的员工培训方法，对企业文化的管理提出具体要求。     

五四小说纯雅身份的形成

在中国古代，诗歌是纯雅文学，与经国伟业相联系，相比之下，小说则地位低下，属街谈巷议、稗官野史之类，难人大雅之堂。然而，五四新文化运动后情况发生了变化，古代读书人所瞧不起的小说不仅逐渐位居文坛中心，而且由发生学意义上的“俗文学”升格为“纯文学”，担当起启蒙之使命，获得了现代“纯雅”文学的身份。