用Greenberger-Horne-Zeilinger态作量子信道实现多点控制的远程单比特幺正变换

提出了一个用三粒子纠缠的GHZ态作为量子信道实现多点控制的远程单比特幺正变换的操纵方案.在该方案中,发送者Alice能“传送”一个幺正变换给远距离的接收者Bob,此幺正变换的结构分别由Alice和Bob决定.而Alice与Bob间的量子信道宽度,亦远程单比特幺正变换的成功操纵几率则由第三者Cindy控制.Cindy与Alice（Bob）间的经典通讯也由Cindy控制.     

Experience of implementing of ISO/IEC 17025: conclusions and recommendations of a workshop

The first experiences of implementing of ISO/IEC 17025 have been obtained by the accreditation bodies and laboratories following the standard, and a workshop to discuss the experiences was arranged. This presentation gives the conclusions and recommendations from the workshop based on the lectures and discussions. In general, the adoption of ISO/IEC 17025 has been a smooth process. Received: 28 February 2002 Accepted: 2 March 2002     

大学化学课程德育的设计与实践

Based on the teaching practice of chemistry courses in university and guided by the training specifications of talents, this paper carried out the ideology of moral education in the course and designed the moral education contents. Specifically, there were five aspects, including the patriotism sentiment, the collaborative spirit, the social responsibility, the innovation and entrepreneurship, the logical thinking and dialectical thinking. Moreover, this paper also putted forward the implementation strategy with combination of the teaching and the self-education.     

Basic steps towards a self-sustainable quality system and laboratory accreditation

 Laboratory managers are facing the task of altering the attitudes of themselves and their employees in order to implement a quality lifestyle, which is the prerequisite for successful implementation of a quality system complying with appropriate international standards. The alterations require a painstaking and constructive approach. Not all laboratories have the resources to secure the assistance of quality consultants. For those laboratory managers who have to find their way towards quality management on their own, some recommendations are given for a path towards a self-sustaining quality system. Several practical aspects of the basic steps in this path, which starts with assessing the current status of the laboratory and is followed by awareness building, are discussed. The recommendations are derived from the experience of the authors in their own laboratories. Received: 5 June 1997 · Accepted: 7 December 1997     

组建近化学类专业本科生综合学习团队的探索

以生物制药和食品大类等近化学类专业本科生为成员组建旨在提升其综合学习能力的团队。开展基于"班级授课""校内实践""校外实践"和"网络媒介"的团队建设,引导团队成员夯实专业基础,开拓学术视野,全方位提升学习和实践能力。在学生学习积极性提升、学习成绩提高、学术性活动的参与度和成功率提高方面获得了初步成效。     

Implementation of the τ-value

We present a finite noncooperative game in extensive form whose subgame perfect Nash equilibria implement the τ-value.     

IMPLEMENTATION OF MIXED METHODS AS FINITE DIFFERENCE METHODS AND APPLICATIONS TO NONISOTHERMAL MULTIPHASE FLOW IN POROUS MEDIA

In this paper we consider mixed finite element methods for second order elliptic prob-lems. In the case of the lowest order Brezzi-Douglas-Marini elements (if d=2) or Brezzi-Douglas-Durán-Fortin elements (if d=3) on rectangular parallelepipeds, we show thatthe mixed method system, by incorporating certain quadrature rules, can be written as asimple, cell-centered finite difference method. This leads to the solution of a sparse, pos-itive semidefinite linear system for the scalar unknown. For a diagonal tensor coefficient,the sparsity pattern for the scalar unknown is a five point stencil if d=2, and seven ifd=3. For a general tensor coefficient, it is a nine point stencil, and nineteen, respectively.Applications of the mixed method implementation as finite differences to nonisothermalmultiphase, multicomponent flow in porous media are presented.     

Interior analysis of the green product mix solution

When modeling optimal product mix under emission restrictions produces a solution with unacceptable level of profit, analyst is moved to investigate the cause(s). Interior analysis (IA) is proposed for this purpose. With IA, analyst can investigate the impact of accommodating emission controls in step-by-step one-at-a-time manner and in doing so track how profit and other important features of product mix degrade and to which emission control enforcements its diminution may be attributed. In this way, analyst can assist manager in identifying implementation strategies. Although IA is presented within context of a linear programming formulation of the green product mix problem, its methodology may be applied to other modeling frameworks. Quantity dependent penalty rates and transformations of emissions to forms with or without economic value are included in the modeling and illustrations of IA.     

非饱和土土力学工程应用方法

通过引入文[1]提出的广义朗肯土压力计算公式,本文针对非饱和土主动(被动)土压力计算问题提出了工程应用方法,能够把非饱和土土压力理论应用于实际工程。该方法可以推广到非饱和土地基承载力、边坡稳定等其他领域,从而为非饱和土土力学理论应用于工程实践提供了一个新的思路。