不连续缓冲体系毛细管电泳技术用于BSA分析的研究

本工作开发了一种在平衡过程和电泳过程采用不连续缓冲体系进行样品毛细管电泳分析的技术。当采用低浓度的磷酸盐缓冲液平衡毛细管,高浓度的磷酸盐缓冲液电泳分离牛血清白蛋白(BSA)时,在电泳过程中可以浓缩进样样品。相反当高浓度缓冲液平衡、低浓度缓冲液电泳时,样品的分离度提高。单独在电泳缓冲液中添加甲醇可提高牛血清白蛋白的分离效果。     

美国解决外来人口和乡村流动儿童教育问题的作法及启示

美国是一个人口流动频繁的国度,不仅包括乡村农民的流动,还包括国内外移民,由此也产生了外来人口和农村流动儿童的教育问题。美国在解决外来人口教育及流动中小学学生的学习问题方面积累了经验。他们较为成熟的作法和运作方式可为我国解决农民工随迁子女的教育问题提供借鉴。     

陶渊明《时运》诗与“曾点气象”

"曾点气象"是理学的重要命题,文章对陶渊明的诗作<时运>与"曾点气象"的关系进行了简要辨析.     

“Susie Bubble is a Sign of The Times”

This essay takes as its point of critical departure the digital stardom of Susanna Lau, aka Susie Bubble, the most recognizable and respected fashion blogger in the world, in order to consider the historical formation of success in the postmillennial digital economy. By examining Lau as an embodied sign rather than an exceptional figure of success, I am concerned with the technical, cultural, and economic forces that give shape to hegemonic notions of success and the ideal subject it produces. More specifically, I hope to demonstrate the cultural frames that structure our ways of seeing and recognizing successful individuals in the post millennium by highlighting the gendered and racial construction of the ideal Web 2.0 subject. The aim of my discussion is to show that the discursive construction of Lau's success is reflective of emerging global patterns born out of the rising significance of Asians and young women (especially young Asian women) as consumers and producers in the digital economy.     

用顶空色谱法分析油田产出水和注入水中碳含量

顶空技术是分析测试前的一项预处理技术 ,它结合气相色谱法应用于油田产出水和油田注入水中碳含量的测定 ,可提高分析结果的准确性 .本文就这项技术的应用作了些探讨 ,并将其结果与酸碱滴定法测定结果进行了比较     

科学终结论的表现形式及其批判

科学终结论①认为,由于种种原因科学的未来前景是走向终结.其表现形式为功成名就论、覆没灭亡论、强弩之末论和四面楚歌论.我们认为科学终结论看到了科学发展过程中内外因素的限制作用,但却将这种限制推向极端而认为是难以克服的,这不符合科学发展的实际情况,因此是对科学发展前景的曲解.我们认为科学的未来是不确定的,它始终处于存在与生成之中.     

A Combined D.C. Optimization—Ellipsoidal Branch-and-Bound Algorithm for Solving Nonconvex Quadratic Programming Problems

In this paper we propose a new branch-and-bound algorithm by using an ellipsoidal partition for minimizing an indefinite quadratic function over a bounded polyhedral convex set which is not necessarily given explicitly by a system of linear inequalities and/or equalities. It is required that for this set there exists an efficient algorithm to verify whether a point is feasible, and to find a violated constraint if this point is not feasible. The algorithm is based upon the fact that the problem of minimizing an indefinite quadratic form over an ellipsoid can be efficiently solved by some available (polynomial and nonpolynomial time) algorithms. In particular, the d.c. (difference of convex functions) algorithm (DCA) with restarting procedure recently introduced by Pham Dinh Tao and L.T. Hoai An is applied to globally solving this problem. DCA is also used for locally solving the nonconvex quadratic program. It is restarted with current best feasible points in the branch-and-bound scheme, and improved them in its turn. The combined DCA-ellipsoidal branch-and-bound algorithm then enhances the convergence: it reduces considerably the upper bound and thereby a lot of ellipsoids can be eliminated from further consideration. Several numerical experiments are given.     

我国公共预算过程的公民参与性问题探讨研究——威尔达夫斯基公共预算的政治思想的启示

本文在阐述威尔达夫斯基公共预算的政治思想的基础上,首先提出研究公共预算领域的公民参与性问题的理论基础及现实意义,既而作者从公民主体、政府主体及相关制度三个方面来分析我国公民参与公共预算存在的障碍,并且对其产生原因进行了分析。最后,针对各方面存在的原因,提出我国推进公民参与公共预算过程的改革思路。     

Optimal Treatment Schedule in Insect Pest Control in Viticulture

A model for the control of the European grapevine moth Lobesia botrana includes two control methods: insecticides and mating disruption. It yields the combination and schedule of application that minimize cost and losses due to the pest. A simulation is presented for an experimental situation.     

空间的拼贴：巴别尔《骑兵军》叙述结构分析

巴别尔的《骑兵军》是在20世纪初弥漫着现代主义文学风格时出现的作品,其叙述技巧精致,叙述结构直接参与作品意义建构：结构的设置与表现哥萨克文化与犹太文化对立冲突的主题相结合。作品的叙述结构同时存在着“破碎”与“整合”,这二者并不矛盾,而是共同体现了作者的声音。对《骑兵军》的叙述结构进行分析,可以从中挖掘出作者“埋藏”在文本中的主旨线索。