我国模糊网纹溞（甲壳纲：双甲目）的补充描述

我国模糊网纹溞（甲壳纲：双甲目）的补充描述陈受忠，张世萍，宋希强中国科学院水生生物研究所武汉４３００７２华中在业大学水产系日本Ｕｅｎｏ氏在记述中国台湾的枝角类一文￣［２］的名录表中列入了模糊网纹（Ｃｅｒｉｏ－ｄａｐｈｎｉａｄｕｂｉａＲｉｃｈａｒｄ，１..

Structure Analysis and Optimization for 5-axis CNC Grinder Bed

在AnSyS软件平台上建立五轴数控磨床有限元模型,对其床身结构进行静、动态特性分析与优化,通过对比提出两种优化方案,分析结果表明:综合改进后的床身相比原床身在静态特性上得到极大提高,且动态特性也有相应的增强。Finite element model of 5-axis CNC grinder bed was built on ANSYS software platform.The two optimal schemes for the bed structure were extracted on the basis of static and dynamic analyses and optimization.Comprehensive analysis shows that the static performance of the improved bed has been greatly enhanced and the dynamic performance has been correspondingly strengthened than original bed.国家科技重大专项资助项目(2010ZX04001-162

STUDY ON ADSORPTION OF A BACILLUS STRAIN TO CADMIUM AND COPPER

从土壤中分离并纯化获得1株芽孢杆菌(Bacillus)。通过该菌菌液对Cd2+和Cu2+的吸附实验,探讨了该菌株对上述2种重金属离子的吸附特性。结果表明:该菌株对2种重金属离子都有较强的吸附能力,但对Cu2+的吸附能力比对Cd2+强;其吸附行为可以用Langmu ir和Freund lich吸附方程描述,但更符合Freund lich吸附方程。与此同时,研究还考察了吸附条件的影响,并获得了最佳的吸附实验条件。A bacteria strain was separated and purified from the soil and identified as Bacillus.In an adsorption experiment,its biosorption characteristics to Cd~(2+) and Cu~(2+) were studied.The strain was shown to have a strong adsorptive capacity to the above two metal ions,with a stronger adsorptive capacity to copper ions than to cadmium ions.Its adsorption behavior could be described by either the Langmuir adsorption equation or the Freundlich adsorption equation,the latter equation being the better.The effect of experimental conditions on adsorption was examined and the optimum experimental conditions were identified

南海中深层动力格局与演变机制研究进展

南海是连接印度洋-太平洋的最大边缘海,在季风、海峡水交换以及复杂地形影响下,南海环流呈现出独特的三层结构以及远强于大洋的混合特征.理论与观测表明,南海内潮、内孤立波以及强风等过程是强混合的动力来源.在南海强混合作用下,南海发育了活跃的中深层动力系统,一方面促进了南海与大洋之间的水体交换,另一方面调控上层风生环流,使得南海环流显著区别于其他热带与副热带海盆.南海活跃的中深层环流所具有的物质搬运能力又显著影响着南海的地质沉积、生物地球化学循环等过程.中国对深海研究持续投入,在南海中深层环流动力学研究方面取得了显著的成果,文章就该方面进行总结,并对南海深海环流未来研究设想进行初步探讨

A New Random Walk Simulation Model for Study of Diffusion Behavior of Single Particle Within Two-Dimensional Space

分子的扩散行为是微观化学的重要研究领域. 影响扩散行为的因素很多，但是目前各个因素的具体影响效果还不明确. 作者基于随机行走理论建立了分子在二维空间的扩散模型，依据此模型自主开发了模拟软件以及数据分析系统，并利用该模拟软件系统研究了势垒尧横向速度等因素对扩散行为的影响，验证了该模型的可靠性，证明根据该模型可以得到和实验尧理论相吻合的结果. 该软件有望成为模拟微观化学扩散行为的潜在平台，如电化学以及膜过滤过程中的扩散.Research on diffusion behaviors is of significant value in that it is closely related to transport phenomena in micro-chemistry. However, the effects of variables on diffusion are still unclear. Here, we developed and programmed a simulation methodology along with data analysis, which was capable to simulate the diffusion of a particle within twodimensional heterogeneous space in large timescale; the effects of periodically arranged impenetrable barriers of specific shape and lateral drifting velocity on diffusion behavior were studied. As well as standard mean square displacement analysis, a new method, the appearance probability distribution method, was introduced, which revealed whether the particle tended to be present at certain positions. This article introduced the construction of the simulation model and demonstrated the validity of the model. The results showed that our model fit qualitatively well with experiments and theories. The model was proved to be an excellent potential platform for simulating the diffusion behaviors in micro-chemistry, such as the diffusion process in electrochemistry as well as nanofiltration membrane.This work was supported by National Basic Research Program of China (973 Program, 2010CB732400), the National Natural Science Foundation of China (NSFC) (20821063, 20873063, 51071084, and 21273113), the Natural Science Foundation of Jiangsu Province (BK2010389).This work was supported by National Basic Research Program of China (973 Program, 2010CB732400), the National Natural Science Foundation of China (NSFC) (20821063, 20873063, 51071084, and 21273113), the Natural Science Foundation of Jiangsu Province (BK2010389).作者联系地址：南京大学 化学化工学院, 生命分析化学国家重点实验室, 江苏 南京 210008Author's Address: State Key Lab of A nalytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210008, China通讯作者E-mail：[email protected]

水利工程护坡生态化设计技术研究

就水利工程项目自身的特殊性质来看，在水利工程施工建造中往往会遇到破坏植被的情况，如果不能从根本上对这一问题加以彻底的解决，势必会造成严重的水土流失问题，最终会对整个地区的经济健康发展造成一定的制约。鉴于此，需要我们从地区经济发展趋势着手，充分联系生态设计规范要求，参照流行设计发展方向，制定有效的地区发展计划，推动地区经济健康稳定发展。</jats:p

政府协调成本分析与控制

政府的协调职能是政府诸项职能中关键的一项,关系着政府体系能否高效、有序地运转。建立廉洁、高效的现代政府,控制政府成本是其中的重要方面,而控制因为协调而产生的成本则尤为重要,需要从多方面努力

Market, Government and Accounting Supervision

本文以经济学中的公共物品理论为基础,并从社会优化选择的角度,提出了理性的会计监管是确保资本市场提供充分信息的重要手段。与民间自律相比,政府主导的独立监管模式在解决市场失灵、提高信息质量方面更具优势。本文最后提出了在我国建立以政府为主导的独立监管模式的初步框架。Based on the theory of public goods in economics and from the perspective of social optimal choice, this paper proposes that reasonable regulation is a vital means by which capital market can furnish adequate information. The independent regulatory model in which government plays a dominant role is more advantageous than self- discipline model in preventing market failure and providing high - quality information. A tentative regulatory framework for establishing independent accounting supervision model in China is outlined in the last part of the paper