求解化学反应动力学参数的一种方法

反应级数的确定在化学动力学研究中非常重要,现给出了利用计算机和用微分法确定反应级数的方法.为了使编程的程序简短、高效,采用MATLAB语言作为编程语言.     

Fiber optic biosensor of immobilized firefly luciferase

Luciferase from firefly lantern extract was immobilized on CNBr-activated Sepharose 4B. The kinetic properties of immobilized luciferase were extensively studied. TheK _m′ for D-luciferin is 11.9 μmol/L, the optimum pH and temperature for Sepharose-bound enzyme were 7.8 and 25°C respectively. A luminescence fiber optic biosensor, making use of immobilized crude luciferase, was developed for assay of ATP. The peak light intensity was linear with respect to ATP concentration in range of 10⁻⁹–10⁻⁵ mol/L. A biological application was also demonstrated with the determination of serum ATP from rats bred in low versus normal oxygen environments.     

电力市场的输电阻塞管理模型

讨论了电力市场的输电阻塞管理同胚，根据电力市场交易规则、输电阻塞管理原则，建立了相应的数学优化模型，算出了各模型对应的配电方案。最后。利用计算机模拟求得在不致引起输电阻塞时最大的市场负荷需求为983．2MW，在不致引起拉闸限电时最大的市场负荷需求为1094．6MW，并对模型的具体算法进行了讨论。     

Introduction to this Special Issue

In 2001, for the first time in the history of the International Association for Counselling, International Conference was held in a developing Asian country–India, with the theme Families in Transition–Counselling in Transition–Meeting the Challenges Ahead. This special issue contains some of the presentations made by Indian participants during this conference which best reflect the challenges and diversities of counseling efforts with families in India. The first article was specially written for this issue in order to give an international relationship of this journal an in depth contextual understanding of Indian families in transition and the challenges they pose to the contemporary Indian counselor. Two articles are reflected to counseling families affected by socio-politial and economic changes. Five authors have written on counseling related to physical and mental disability/addiction and last two articles are reflected to authors experiences as family counselors.     

略议完善"会计委派制"

本文对实行会计委派制的意义进行了初步探讨，并针对我国现行的会计委派制在试行过程中存在的问题进行了多方面的分析，对今后应如何完善会计委派制提出了一点建议。     

Kinetics study on biomass pyrolysis for fuel gas production

Kinetic knowledge is of great importance in achieving good control of the pyrolysis and gasification process and optimising system design. An overall kinetic pyrolysis scheme is therefore addressed here. The kinetic modelling incorporates the following basic steps: the degradation of the virgin biomass materials into primary products (tar, gas and semi-char), the decomposition of primary tar into secondary products and the continuous interaction between primary gas and char. The last step is disregarded completely by models in the literature. Analysis and comparison of predicted results from different kinetic schemes and experimental data on our fixed bed pyrolyser yielded very positive evidence to support our kinetic scheme. Project (No. 2001CB409600) Supported by the National Key Basic Research Program (973) of China     

普通话二字组词语的动态声调

普通话二字组词语不同的声调组合方式 ,使前后位声调产生不同的动态变化形式。前位声调的动态变化明显表现在上声调变为低降调和中升调上 ;后位声调的动态变化则表现在调值的明显改变上。后位声调的动态变化更为普遍 ,应该引起足够的重视     

论“通识”与“通识教育”

通识在本体论与认识论层面 ,是对常识、对科学的超越 ,在人生观与价值观层面 ,通识是对人的生命本然、终极目的与理想等意义世界的观照。在物质化与科技化的今天 ,人类需要特别关注通识。然而 ,达至通识之境并非自然自发过程 ,而是一个自为自觉过程。人类的通识 ,需要教育的参与、引导、培育和建构