球磨机控制系统的优化

针对太原第一热电厂2台300MW火力发电机组的8台钢球磨系统稳定性、煤粉的均匀性较差,甚至发生断煤、超压、超温或堵煤等现象进行合理分析,运用"自寻优——模糊控制"的原理对该钢球磨系统进行优化处理,并结合WDPF-Ⅱ控制系统详细设计了可行性优化实施方案。     

600 MW燃煤机组石子煤处理系统选择研究

文章按当前国内600 MW燃煤机组的实际情况,介绍了600 MW燃煤机组三种石子煤处理主要系统的工艺流程和特点,并对三种系统做出技术经济的综合比较,进而说明了各种系统的适用范围。     

综采放顶煤无煤柱开采自燃预防技术

分析了综采放顶煤工作面无煤柱开采自然发火的特点与规律,结合综采放顶煤工作面实际条件和各种防灭火技术的特点,以灌浆、注胶防灭火技术为主要手段,因地制宜,合理地运用堵漏、均压、灌浆、注胶对综采放顶煤工作面煤层火灾进行防治。     

浅谈艾默生DCS系统OVATION3.51接地

DCS系统合理、准确及可靠接地,是保证电厂机组DCS安全稳定可靠运行的必要条件,是系统网络通信畅通无阻的重要前提。根据该厂4×350MW燃煤机组采用的DCS系统设计、现场实际经验,对DCS系统的接地进行了探讨。     

300MW循环流化床锅炉落煤管堵煤措施

云浮C厂两台机组均为上海电气集团具有自主知识产权的300MW循环流化床机组;配套两台300MWCFB锅炉结构均为单炉膛,3个绝热旋风分离器,炉前8点给煤。文章结合实际运行中经常发生落煤管堵煤,提出为保障锅炉安全运行,提高机组运行稳定性,应该对落煤管进行简易改造,并制定控制措施,以期解决落煤管堵煤问题。     

基于UDEC的近距离煤层采空区下底板破坏特征分析

针对近距离煤层下层煤回采巷道受上层煤采动影响,其顶板岩层受到不同程度破坏、整体性相对较差,支护难度较大的实际问题,文章利用离散元软件UDEC对上下两层煤夹层厚度不同时下层煤项板破坏特征及回采巷道稳定性进行了分析,为下层煤回采巷道选择合理支护方式及设计支护参数提供理论支持,具有一定的实践应用价值.     

残煤开采的巷道布置

文章根据衰老矿井的实际,分析了残煤开采的适用条件,提出了残煤开采中合理布置巷道的方案。对衰老、储量枯竭的矿井,应利用现有生产系统和设备进行改造与延深,以提高资源回收。在巷道布置和采煤方法的选择上,应本着残煤不残采的原则,充分利用综采放顶煤等先进技术,保证在安全生产的基础上创造更高的经济效益。     

废旧沥青面层冷再生技术研究

进入21世纪以后,沥青路面再生技术因符合我国环保、节约的基本国策,引起了高度关注。当前,我国沥青面层跣刨料冷再生技术应用尚处于初级研究阶段。文章根据工程实际,反复进行室内试验,利用公路沥青面层铣刨料,在不添加新料的情况下,对铣刨的沥青面层料进行水泥冷再生,将其作为低等级公路路面基层,做了有益的探索应用,效果良好。     

浅析磨煤机石子煤对供电煤耗的影响

机组运行中磨煤机石子煤排放量大，造成极大浪费，严重影响了机组供电煤耗、锅炉热效率等经济指标。本文以大唐鲁北发电有限责任公司1、2号机组运行情况，作出石子煤对供电煤耗指标影响简易分析，供大家交流研讨。     

关于燃用低灰熔点煤种分析及措施

根据国电常州发电有限公司600MW机组锅炉掺烧低熔点煤的运行情况,分析掺烧低熔点煤对锅炉安全及相关参数的影响。提出针对性的技术措施,有效避免异常工况的发生,提高机组运行安全性。     

浅析建筑工程设计阶段的投资控制措施

建筑工程项目造价控制对建设单位的经济收益影响较大,把握好设计阶段的投资控制有助于各项资金的规划使用。建设项目设计的方案充分考虑造价因素,能给整个工程的成本控制创造条件。基于此,本文主要对建筑工程设计阶段的投资控制措施进行了探讨。     

Matchmaking: community and business unit racial/ethnic diversity and business unit performance

Past studies examining how the match between organization and community racial/ethnic proportions influences performance have relied on the social categorization perspective on diversity, but have not offered strong significant results. However, the information and decision-making perspective on diversity suggests that organizational diversity fit based on variety, rather than a match of demographic proportions, leads to greater performance. This study considered both perspectives to test how both racial/ethnic proportions matching and diversity fit influence business unit financial performance. This was tested on a sample of 51 business units of a restaurant chain in the USA. The results show that business unit diversity was associated with higher performance in diverse communities but not in homogeneous communities. This suggests that racial/ethnic diversity is a valuable human resource conducive to greater performance but this is contingent upon community diversity. Implications for organizational diversity research and human resource management are discussed.     

Het matchen in de psychologie

Matching in Psychology
In experimental psychology the matching method seems to be one of the most promising methods. This paper deals with the matching of a series of t elements against a series of t other elements. The stated null hypothesis is: for a fixed order of one of the series each permutation of the second series has the same probability.
As a test criterion in the case of one matching is defined: the number r of matches, e.g. the number of "right pairs"; for n matchings: .
As the distribution of for t=3 cannot be found in literature, a table of is given for n=I(I)30: see table I. The way of calculating and verifying is discussed.
For the problem of t=3 and n 31 the degree of approximation by the normal distribution and by the Pearson's Type III distributions is examined. With the application of a correction for continuity the former gives for n=30 a reasonable approximation, the latter a very good approximation: see table 2.     

Online doctor-patient dynamic stable matching model based on regret theory under incomplete information

With the development of the Internet era, online medical community is increasingly favored by patients and health care workers. How to make a reasonable doctor-patient matching and meet patients' relevant needs through online medical platform is the key to realizing effective allocation of medical resources. This paper proposes an online doctor-patient dynamic stable matching model to deeply investigate the online doctor-patient matching problem under incomplete information. Firstly, we assign the score to each doctor based on the patient's attribute expectations and the doctor's evaluation information. Considering the difficulty of obtaining complete information in real life and different attribute representations, we propose incomplete information filling methods based on collaborative filtering algorithm. To make the filling result more reasonable, we introduce probabilistic linguistic information entropy to process the incomplete information. Secondly, considering psychological behavior, we use regret theory to calculate patients' satisfaction with doctors. Finally, with the definitions of rational matching and stable matching, we propose a doctor-patient dynamic stable matching model. This model can solve the problems like a temporary appointment and private matching and ensure the stability of matching. In addition, the model proposed in this paper considers not only patients' but also the doctors' needs. The case of online doctor-patient matching is based on “haodf.com”, and through comparative analysis can prove the effectiveness and superiority of this method.     

A distributional synthetic control method for policy evaluation

We extend the synthetic control method to evaluate the distributional effects of policy intervention in the possible presence of poor matching. The counterfactuals (or intervention effects) are identified by matching a vector of pre-intervention quantile residuals of the treated unit and a convex combination of its potential-control counterparts. The residuals are orthogonal to a set of observable common factors that control for the potentially poor matching. We also apply our method to a set of case studies that explore the distributional effects of state-level minimum-wage hikes in the USA.     

色彩在建筑设计中的应用分析

色彩是建筑艺术的重要组成部分,具有象征、装饰、标志等功能。通过色彩的搭配、调和,可以为人们创造舒适的色彩环境。本文通过分析色彩在建筑设计中的应用,力求在设计中做到色彩搭配的协调统一,合理选择设计色彩,以达到最佳视觉效果。     

Some of the Conventional Accounting Concepts That Are Not in Accordance With the Paradigm of Islamic Accounting

This paper discusses some of the conventional accounting concepts, such as historical cost concept, conservatism concept, matching concept, objectivity concept, stable monetary unit assumption, and going-concern assumption, which are not in accordance with the Islamic accounting paradigm due to their divergence with some verses of the Holy AI-Qur＇an, the Hadiths of the Prophet Muhammad, peace be upon him （pbuh）, and the basic of Zakat calculation. This is a conceptual paper describing some of the conventional accounting concepts that are not in accordance with the paradigm of Islamic accounting. The paper concludes that the historical cost concept can be replaced by： current cash equivalent concept, historical cost and current value concepts （market selling price）, current cost concept, historical cost concept in all （except for Zakat purposes） accounting calculations, current valuation concept, and fair value concept. Conservatism concept must be eliminated if historical cost concept is not used anymore. Matching concept can be replaced by asset-liability approach concept. Objectivity concept can be replaced by Zakat accountability concept. Stability of the monetary unit assumption can be replaced by gold or silver measurement, or Dirham currency, and going-concern assumption must be eliminated.     

Near unit root small open economies

The marginal utility of wealth in incomplete markets small open economy models follows a unit root process. I study the nonlinear properties of devices often used to remove the unit root and I find that they generate different dynamics when matching emerging markets. Models with endogenous discount factors reinforce consumption response to shocks and increase the countercyclicality of the trade balance to output ratio. Conversely, models with debt frictions ameliorate the responses of consumption and trade balance. Hence, to generate dynamics similar to those in emerging economies, the debt frictions need to be small, inducing a near unit root behavior in their Euler equations. This difference across models is hidden when matching developed economies because of consumption smoothing and the mild countercyclicality of the trade balance.     

霉售连锁企业物流配送网络评价研究

基于供需匹配度。分析了连锁零售企业配送网络中由时间、数量的匹配关系引发的物流成本。将不同量纲的时间、数量和费用的单位统一为费用,构建出广义费用函数模型,以此为评价零售连锁企业物流配送网络的评价服务水平提供科学依据。     

高科技创新团队组建机理探析

高科技创新团队是完成科技创新的主力军,和一般团队相比它更加高效、更加个性、更加合理。为了满足这些不同的要求,本文构造出三个模型,通过不同的团队匹配模式,来实现高科技创新团队的有效组建。