晓南煤矿通风系统仿真

为了解决晓南矿通风系统过于复杂,难以管理的问题,利用矿井通风仿真系统(MVSS)软件,构建了晓南煤矿通风仿真系统,针对晓南矿通风系统的复杂性,进行了分析研究。对不合理的巷道布置提出了改进方案,并通过计算机进行了仿真模拟,根据仿真结果的比较,确定了优化方案,并成功地进行了通风系统改造。模拟结果表明,仿真效果良好,全面提升了矿井的通风管理水平及决策能力,对矿井通风管理有较好的指导作用。     

Improved area-difference-based recovery information placement

<正> In mobile computing systems,message logging can be used to provide fault tolerance for mobilehosts.Due to the mobility of mobile hosts,their recovery information,including logged messages andcheckpoints,may spread throughout mobile support stations.During recovery,there will be a considerablecost for the collection of recovery information.To speed up recovery and to reduce the failure-freeoverhead,an improved area-difference-based scheme is proposed.It tries to keep recovery informationevenly spreading over an area.Only part of recovery information needs to be migrated for controlling thedistribution of recovery information.To reduce the migration cost,a light-weight migration is also proposed.In the performance study,we give an analysis of the probability that the light-weight migrationtakes place.     

春秋文字发展演变的初步考察

据目前所见出土古文字材料,春秋时期新造汉字593个,汉字系统进一步趋向完善和稳定,表意构件系统已比较成熟。汉字构形方式系统进一步调整与优化,表意类构形方式的功能趋向更加衰弱,形声构形方式的优势地位继续加强。汉字字形演变存在省简、增繁、替换和讹变等多种形式,有少数字形经变异后成为定型而进入文字系统传承,不过大多数汉字形体结构相对稳定。汉字的发展演变既表现为时代性的演进,同时又开始形成地域性风格特征。     

浅析企业产品质量管理

产品质量决定企业经济效益,关系到企业的兴衰成败。通过分析影响产品质量的因素,提出了提高企业产品质量的途径。     

南昌滕王阁明清庾楼群汇考——江右史话批判之四

本文通过地毯式发掘、排比明、清江右省、府、州、县、厅<官志>"省会水次漕仓"原始档案,系统还原明、清两代五个半世纪间.南昌章江水次五十余县邸阁漕仓"望江楼"群密集汇聚历史原貌;率先揭举明景泰三年又嘉靖六年江右官宪挪移高安等县废仓直接改筑滕王阁之滕学建筑秘史;并深刻揭示汉晋邸阁隋唐转型运动虽降至明、清,仍不断重复其农业文明仓储文化遗传基因漕仓邸阁/名胜楼阁/会馆公寓等社会政治、经济、文化三重复合身份循环转换的生命轮回模式;全面辩证洪州滕王阁原生态邸阁历史文化圈自然、人文、经济地理学核心价值;穿透封建史学迷雾与江右史话泡沫,复原千古名楼滕王阁庐山真面目.     

打造团队精神 提高企业执行力

在企业飞速发展的时代,执行力对一个企业的发展起着越来越重要的作用,它将是构成企业竞争力的重要组成部分,从而成为决定企业成败的一个重要因素。     

GPS测量及GPS—RTK技术在工程测量中的应用——以晋城—长治煤层气输气管道工程线路测量及中线放样为例

以实际工程为例,介绍了GPS—RTK技术在工程测量中的应用,总结了几点体会。     

浅谈如何培养技校学生学习电工学课程的兴趣

根据技校学生的现状和笔者的教学体会,要想全面提高教学质量.必须重视培养学生的学习兴趣,改变传统的教学模式,因材施教,循序渐进,创建良好的师生关系,激发学生学习的热情和兴趣.     

Effect of intermittent aeration on the treatment performance in a submerged membrane bioreactor

In order to improve removal for nitrogen in a pilot-scale submerged membrane bioreactor (SMBR), intermittent aeration was conducted, and the effect on the treatment performance under four kinds of operation condition (run 1, continuous aeration; run 2, 60/60 min aeration on/off time; run 3, 60/90 min aeration on/off time; run 4, 60/75 min aeration on/off time) was evaluated. The results showed that depending on the specific on/off of the aeration time ratio, removal efficiency of nitrogen could be improved significantly, and the removal rates of total nitrogen (TN) under different operation conditions were 28.0%, 59.5%, 66.8% and 70.7%, respectively. There were no obvious differences for removal rates for COD_Cr and ammonia among different operation conditions. In general, intermittent aeration could be used as a feasible way to improve treatment performance for nitrogen in the SMBR.     

The impact of warrants introduction: Sign effect or magnitude effect?

The data of warrants underlying stocks was selected for the sample period from August, 2005 to December, 2009. These data the authors collected did not include the announcement date of reform of non-tradable underlying shares, and was available from Shanghai and Shenzhen stock exchanges. The event study method is employed to test the magnitude effect based on the Wild bootstrap, which is performed on the abnormal return, the cumulative abnormal return, and the standardized cumulative abnormal return. Empirical results show no evidence of magnitude effect but sign effect after warrants introduction. The authors argue that this phenomenon is caused by the migration of radical agents from stock market to warrant market.