A Hierarchical Ensemble Learning Framework for Energy-Efficient Automatic Train Driving

Railway transportation plays an important role in modern society. As China's massive railway transportation network continues to grow in total mileage and operation density, the energy consumption of trains becomes a serious concern. For any given route, the geographic characteristics are known a priori, but the parameters(e.g., loading and marshaling) of trains vary from one trip to another. An extensive analysis of the train operation data suggests that the control gear operation of trains is the most important factor that affects the energy consumption. Such an observation determines that the problem of energy-efficient train driving has to be addressed by considering both the geographic information and the trip parameters. However, the problem is difficult to solve due to its high dimension, nonlinearity, complex constraints, and time-varying characteristics. Faced with these difficulties, we propose an energy-efficient train control framework based on a hierarchical ensemble learning approach. Through hierarchical refinement, we learn prediction models of speed and gear. The learned models can be used to derive optimized driving operations under real-time requirements. This study uses random forest and bagging – REPTree as classification algorithm and regression algorithm, respectively. We conduct an extensive study on the potential of bagging, decision trees, random forest, and feature selection to design an effective hierarchical ensemble learning framework. The proposed framework was testified through simulation. The average energy consumption of the proposed method is over 7% lower than that of human drivers.     

接触辉光放电等离子体降解水体中硝基苯

用接触辉光放电等离子体对硝基苯的降解进行了研究，考查了电压、浓度、pH值、催化剂对降解率的影响。结果表明：电压、浓度、催化剂对反应速率有显著影响，pH对硝基苯降解无明显影响。同时，利用高效液相色谱法对中间产物进行了分析，推测了硝基苯接触辉光放电降解的历程。     

二氯二聚吡咯合铁的结构和吸附氢行为的CNDO／2研究

应用CNDO／2方法研究了二氯二聚吡咯合铁配合物（DCBPF）的结构和H2在该配合物上的吸附行为，确定了配合物的稳定结构，讨论了被吸附分子相对于配合物的不同吸附取向的影响，优化了各个体系相对于能量的分子间距，探究了吸附的微观机制，得到了一些比较有意义的结果。     

高职《公路工程计量与计价》适岗性教学内容构建

高职<公路工程计量与计价>是一门技术性、实践性很强的课程.高职教育特别强调面向工作岗位适岗能力的培养,所以必须以学生就业岗位的工作内容为出发点,以岗位能力培养为目标构建课程内容体系.文章提出的四情境、四步骤教学内容体系,打破了传统的教学体系束缚,把知识和能力融入具体工作岗位项目的实施过程中,突出培养学生分析、解决实际工程问题的能力,实现课程和就业岗位零距离对接.     

血液筛查中核酸检测与ELISA联合应用的研究

通过对血浆标本的核酸和血清学检测结果进行比较分析,探讨核酸检测（NAT）与酶联免疫吸附试验（ELISA）联合应用在血液筛查中的意义.研究从血浆样本中同时提取HBV、HIV和HCV核酸,采用荧光实时聚合酶链反应（PCR）进行检测,同步进行ELISA检测HBV、HIV和HCV抗原或抗体.在5 184份血浆标本中检测出HBV“窗口期”标本12份,检出率为0.23％;检测出HCV“窗口期”标本3份,检出率为0.058％;未检测出HIV“窗口期”标本.从而得出结论,核酸检测可以有效检测出血浆中的HBV、HIV和HCV的“窗口期”标本.     

Science Letters: A new quantitative model of ecological compensation based on ecosystem capital in Zhejiang Province, China

Ecological compensation is becoming one of key and multidiscipline issues in the field of resources and environmental management. Considering the change relation between gross domestic product (GDP) and ecological capital (EC) based on remote sensing estimation, we construct a new quantitative estimate model for ecological compensation, using county as study unit, and determine standard value so as to evaluate ecological compensation from 2001 to 2004 in Zhejiang Province, China. Spatial differences of the ecological compensation were significant among all the counties or districts. This model fills up the gap in the field of quantitative evaluation of regional ecological compensation and provides a feasible way to reconcile the conflicts among benefits in the economic, social, and ecological sectors.     

中国古代楚国建筑的“天人合一”建筑观

本文试图以研究古代楚文化的特点为基础，探讨其“天人合一”建筑观的形成必然性和其建筑独具风格的南国特色。     

浅析顾客互动对服务交互质量的影响及管理对策

从服务交互过程当中的影响因素入手,考察了服务体验3个阶段中顾客网络互动对服务交互质量的影响,提出了进行顾客互动管理控制的对策,从理论上论证了顾客授权的必要性.     

Rookit木马的隐藏机理与检测技术剖析

随着网络技术的发展，基于传统隐藏技术的木马已经很难生存，木马隐藏技术开始由Ring 3级转入Ring 0级．运行在Ring 0级的木马，拥有与系统核心同等级的权限，隐藏与伪装更为容易．笔者讨论了Windows内核系统服务调用机制，分析了删除进程双向链表中的进程对象、SSDT内核挂钩注册表隐藏、端口隐藏等Rootkit木马的隐藏机理，最后对Rookit木马的几种检测技术作了详细的剖析．研究内容对增强人们防患意识、更好地维护计算机系统的安全有一定的参考价值．     

离子浮选体系的理论研究

本文介绍了离子浮选的理论和应用,并着重探讨了离子浮选系统中竞争离子的临界浓度和目标离子的最大回收率公式。在上述基础上设计了一个计算机软件SIFSAC来帮助选择适宜的捕收剂和浮选工艺条件,分析工艺指标和工艺条件对溶液中离子初始浓度的敏感性。结合实例说明了应用。