提高定制产品物料需求预测的准确性

提高定制产品物料需求预测准确性是提高企业竞争能力的必由之路。通过某公司提高定制产品物料需求预测准确性的具体项目实践，介绍了关于提高物料需求预测准确性的具体措施。通过建立一种能为各部门所共同接受的产品语言来加强各部门的信息交流，并减少从客户的实际需求到物料预测之间的中间环节来提高整个物料预测的准确性，并以实例验证其有效性。     

Addition of malodorants to lighter gas – The phase equilibrium properties of mixtures of lighter gas and selected substances

Relevant thermodynamic and phase behavior of mixtures created by adding malodorants to lighter gas to discourage its abuse have been studied. The influence of physical factors such as temperature, pressure and concentration of the selected substances with lighter gas is studied. This work represents one component in a larger study examining the feasibility of adding malodorants to lighter gas and focuses on the physical chemistry or chemical engineering aspects of the problem. An initial set of 27 compounds was selected based on deterrent effect (odor) in order to find suitable additives to lighter gas components. The aim is to find substances that not only have the correct physiological effect (discourage abuse) but also the correct physical behavior upon addition to lighter gas (solubility, phase behavior). Specifically the way the malodorant partitions between the vapor and liquid phase is modeled. Furthermore, addition of the malodorants should not affect the normal use of the lighter. Thus of the 27 initial components chosen, nine were found that could be suitable additives. In this work we used the thermodynamic models COSMOtherm – an activity coefficient model – and Cubic-Plus-Association (CPA) – an equation of state – to model the fluid phase and solubility behavior of the mixtures formed by the various additives with butane.     

潜艇规避锚雷安全距离选择问题

当潜艇使用本艇声纳发现水雷或航行通过已预告的水雷位置点附近海域时,潜艇都必须建立一个最小安全距离,从而依此对水雷进行机动规避．通过对潜艇规避水雷过程中的因素进行分析,给出了潜艇规避水雷最小安全距离的通用计算公式,为潜艇规避单枚水雷提供了科学依据．     

低温甲醇洗碳捕集改进与优化

减少CO₂排放对环境保护尤为重要。传统低温甲醇洗工艺中大量被贫甲醇吸收的CO₂由于被N₂稀释而直接作为尾气排放进大气中。为探究工艺改进空间,本研究基于Aspen Plus对一传统低温甲醇洗工艺进行模拟,物性方法选用CPA (Cubic-Plus-Association)模型并对该模型的二元交互系数进行回归修正,后与实际数据进行对比确保模型的准确性。对于工艺改进,首先在传统低温甲醇洗工艺的基础上采用四级增压热闪蒸和降压闪蒸相结合的方式进行一次改进以用于CO₂捕集,并对相关参数进行优化以进一步降低系统公用工程消耗。结果显示,虽然一次改进工艺的CO₂产量是传统工艺的3.3倍,但系统能量消耗增加了2.12%,系统(火用)消耗增加了17.81%。接着,在一次改进工艺的基础上采用“半贫液+透平回收”相结合技术进一步进行节能改进,二次改进工艺的CO₂产量不仅与一次改进工艺相当,系统能量消耗和系统(火用)消耗相比于传统低温甲醇洗工艺也分别降低了17.16%和5.85%。     

经济全球化对我国注册会计师审计的挑战

从四个方面分析经济全球化对我国审计行业的挑战，指出了目前中国会计师事务所存在的问题，这些问题将会影响会计师事务所的生存，本文对解决这些问题提出了一些有益的建议。     

A hybrid fuzzy MCDM approach for evaluating website quality of professional accounting firms

Due to the popularity of internet, the CPAs can develop websites that properly deliver professional information and represent their firms. Effective use of CPA firm websites can increase communication with existing clients and attract potential clients. This study aims to build a hybrid approach that combines the fuzzy analytic network process (FANP) and fuzzy VlseKriterijumska Optimizacija I Kompromisno Resenje (FVIKOR) for evaluating website quality of the top-four CPA firms in Taiwan and provide worthwhile recommendations for enhancing website design and content. The results show that CPA firms included in this study do not utilize the Internet to its full potential and need to improve their websites. Deloitte has the best overall performance, follow by PricewaterhouseCoopers, Ernst & Young, and KPMG. Additionally, the top-five evaluation criteria in order of importance are richness, understandability, assurance, relevance, and reliability. Therefore, the findings of this study can help CPAs identify the strengths and weaknesses of their own websites and in comparison with those of their competitors, and then make resource allocation decisions about how to improve the status quo and achieve ideal websites.     

Report of CPA Representative Social Science Research Council of Canada.

Presents the report of the Canadian Psychological Association Representative to the Social Science Research Council of Canada. The Annual Meeting of the Social Science Research Council of Canada met at Carleton University on 13 June 1967. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Rapport Du Representant De La SCP Au Conseil National De La Planification Scientifique De L'association Canadienne D'Hygiene Mentale.

Presents the report of the Canadian Psychological Association representative to the National Scientific Planning Council of the Canadian Mental Health Association. The purpose of this report is to communicate in very brief form the activities of the Council which are most likely to be of interest to psychologists. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

电荷颗粒聚结技术在汽轮机润滑系统油泥清除上的应用

针对华能沾化热电有限公司(以下简称沾化热电)150 MW机组汽轮机润滑系统油泥污染严重,人工清洗费时费力且不能彻底清理的问题,采用国际领先的电荷颗粒聚结技术(Charge Particle Agglomeration,简称CPA)对汽轮机润滑系统进行在线清洗,最终使油泥倾向指数降到12,达到了国际上判定汽轮机油油泥倾向等级状态良好(<15)的标准。     

Dynamic inhomogeneous S-Boxes design for efficient AES masking mechanisms

It is an important challenge to implement a lowcost power analysis immune advanced encryption standard （AES） circuit. The previous study proves that substitution boxes （S-Boxes） in AES are prone to being attacked, and hard to mask for its non-linear characteristic. Besides, large amounts of circuit resources in chips and power consumption are spent in protecting S-Boxes against power analysis. Thus, a novel power analysis immune scheme is proposed, which divides the data-path of AES into two parts： inhomogeneous S-Boxes instead of fixed S-Boxes are selected randomly to disturb power and logic delay in the non-linear module; at the same time, the general masking strategy is applied in the linear part of AES. This improved AES circuit was synthesized with united microelectronics corporation （UMC） 0.25 μm 1.8 V complementary metal-oxide-semiconductor （CMOS） standard cell library, and correlation power analysis experiments were executed. The results demonstrate that this secure AES implementation has very low hardware cost and can enhance the AES security effectually against power analysis.