551t超载超限大型设备通过丰乐北横路桥处理措施

本文通过运输广州石化厂大型设备项目，对运输线路上丰乐北横路桥承受大型设备荷载进行设计研究，提出加固方案，为同类工程提供了经验。     

路网改造施工中的安全管理与控制

叙述了路网改造施工中安全管理的基本任务,总结了影响路网改造施工安全管理的相关因素和安全管理的特点,并根据路网改造工程施工的实际情况,提出了加强施工过程中安全管理的主要控制措施,可为同类工程中的施工安全管理工作提供参考。     

Bayesian calibration of mechanistic aquatic biogeochemical models and benefits for environmental management

Aquatic biogeochemical models have been an indispensable tool for addressing pressing environmental issues, e.g., understanding oceanic response to climate change, elucidation of the interplay between plankton dynamics and atmospheric CO₂ levels, and examination of alternative management schemes for eutrophication control. Their ability to form the scientific basis for environmental management decisions can be undermined by the underlying structural and parametric uncertainty. In this study, we outline how we can attain realistic predictive links between management actions and ecosystem response through a probabilistic framework that accommodates rigorous uncertainty analysis of a variety of error sources, i.e., measurement error, parameter uncertainty, discrepancy between model and natural system. Because model uncertainty analysis essentially aims to quantify the joint probability distribution of model parameters and to make inference about this distribution, we believe that the iterative nature of Bayes' Theorem is a logical means to incorporate existing knowledge and update the joint distribution as new information becomes available. The statistical methodology begins with the characterization of parameter uncertainty in the form of probability distributions, then water quality data are used to update the distributions, and yield posterior parameter estimates along with predictive uncertainty bounds. Our illustration is based on a six state variable (nitrate, ammonium, dissolved organic nitrogen, phytoplankton, zooplankton, and bacteria) ecological model developed for gaining insight into the mechanisms that drive plankton dynamics in a coastal embayment; the Gulf of Gera, Island of Lesvos, Greece. The lack of analytical expressions for the posterior parameter distributions was overcome using Markov chain Monte Carlo simulations; a convenient way to obtain representative samples of parameter values. The Bayesian calibration resulted in realistic reproduction of the key temporal patterns of the system, offered insights into the degree of information the data contain about model inputs, and also allowed the quantification of the dependence structure among the parameter estimates. Finally, our study uses two synthetic datasets to examine the ability of the updated model to provide estimates of predictive uncertainty for water quality variables of environmental management interest.     

简析沥青混凝土路面施工中的若干技术问题

从沥青混凝土路面施工全过程出发,对实际施工中的工序、工艺技术进行了阐述,并针对施工中出现的问题提出处理措施。     

试论高校在培养青年马克思主义者中的作用

培养青年马克思主义者，使他们坚定中国特色社会主义的理想信念，事关党的事业后继有人，事关国家的兴旺发达。培养青年马克思主义者不仅具有重要的战略地位和意义，也是高校的一项重要战略任务。为深入贯彻党的十七大精神，高校应着力探索如何培养青年马克思主义者的有力措施。     

援外港口工程概算的影响要因分析及其解决对策

在调查分析的基础上,应用数理统计的方法,结合工程经验,确定援外港口工程概算编制的主要影响要因,并提出了解决影响要因的对策。     

接触网锚板埋设一次到位施工技术

对影响锚板埋设施工质量的关键环节进行了归纳,介绍了确定下锚支延长线的2种方法,推导出了确定锚杆出土角度和锚坑位置的计算公式,提出了确定锚杆埋设位置、保证锚杆和锚板受力后稳定等方面的技术措施和工艺措施,并强调了锚板埋设施工中应注意的事项。实践应用证明,采用本施工技术措施,可实现接触网锚板埋设施工一次到位。     

S7-200 PLC高速计数器在电子调速器仿真训练器中的应用

高速计数器的主要功能就是对主机实际转速反馈进行测量,这是电子调速器的一项重要功能,因为主机实际转速反馈测量的准确与否直接关系到保证主机转速稳定,保证主机运行的安全.重点介绍了S7-200PLC高速计数器.在开发研制中发现,采用S7-200 PLC高速计数器可以非常准确地对主机实际转速反馈进行测量,而且硬件实现非常简单,价格也比较低,具有很大的实船应用价值.     

客运专线预制箱梁高性能混凝土施工技术方案解析

总结影响客运专线预制箱梁高性能混凝土质量的各种因素，并以我国在建客运专线后张法预应力混凝土箱梁预制施工为例，从混凝土原材料选择、混凝土优化配置、混凝土施工、箱梁施工过程控制与检验等几方面，对保证箱梁高性能混凝土施工质量的技术方案和措施进行阐述，为高速铁路及客运专线桥梁设计和施工提供经验。     

动车组侧门故障原因分析及改进

分析了动车组侧门故障产生的原因,提出了相应的处理对策。