建筑设计中的火灾自动报警系统

阐述了火灾自动报警系统对火灾预警及消防的作用,详细说明了火灾自动报警系统各组成部分的功能及工作原理,从而提高有关部门的防火意识和进一步推广火灾报警系统的应用。     

Adequate air volume in working face after mechanical refrigeration

By analyzing the coal mine working face ventilation and cooling cost after mechanical method is adopted for temperature decrease, the relationship between air volume and ventilation cooling cost was established. And through mathematical analysis and specific applications of the model, the reasonable air volume is determined. With respect to the actual conditions of a coal mine, the air volume is figured out. In order to verify the correctness of the air volume by the new method, the Ansys model of ventilation cooling for the working face is established, and the effect of cooling under the air volume is simulated. The simulation results can meet the mine cooling requirement after being applied in coal mine, the cooling effect and the economic benefit are satisfactory.     

城市管道天然气在土壤中泄漏扩散实验研究

天然气在土壤中扩散行为的实验研究对埋地管道泄漏点的科学定位及泄漏事故的预防具有重要意义.采用全尺度气体泄漏实验系统,模拟真实埋地管道泄漏场景,对泄漏后的天然气在土壤中的扩散对流过程进行实验研究.基于自行研制的气体检测与数据采集系统和GasClam地下气体在线监测仪,分析天然气在土壤中的对流扩散规律.结果表明:埋地管道泄漏后天然气在土壤中的对流扩散过程可以分为4个阶段:孕育阶段、陡然增长阶段、缓慢增长阶段和稳定阶段,其浓度随泄漏时间的变化过程符合S型曲线特征.天然气扩散至检测点所需时间与距泄漏口距离呈现近似的幂指数关系.当检测点位于泄漏口附近区域时,泄漏压力起主导作用.当检测点位于远离泄漏口区域时,泄漏量起主导作用.     

预应力锚索和微型桩联合处理深基坑失稳事故

土钉支护具有经济快捷等优点,但土钉支护单独使用也有其局限性。通过对某土钉支护深基坑在施工过程中发生支护失稳出现险情的原因进行分析,及时地设计预应力锚索和微型桩予以联合加固,有效地控制了该基坑的变形,保证了地下室施工的安全。     

共同构建和谐社会的安全生产网

为了解我县相关部门依法履行安全生产职责的情况,最近我县人大常委会进行了一次<安全生产法>执法检查活动,并收到了预期的效果.本文拟就参加这次执法检查中发现的问题,谈谈如何坚持以处理好"五个关系"为切入点,改进和加强<安全生产法>的执法和监管问题,供政府及有关部门研究参考.     

乐山大佛-峨眉山景区的规划与管理

阐述了乐山大佛景区和峨眉山景区的历史概况和管理现状，从乐山市旅游发展总体趋势、国际旅游城市发展趋势、世界遗产保护三个方面分析了乐山大佛、峨眉山景区分开管理的弊端，提出乐山大佛-峨眉山这一世界遗产要成立统一的管委会的观点及依据，最后对乐山旅游景区管理提出了几点建议。     

我国现阶段城市污水处理领域投融资机制问题分析

本文在分析了我国城市污水处理设施建设投融资机制的发展历程和挑战的基础上,提出了在现阶段需要解决的问题,并重点研究了如何为污水处理领域的私人部门参与项目提供资金支持,并保证公平受益以及要根据区域特征明确投融资和污水处理费的政策导向。     

工伤保险中行业风险分类指标研究

简要介绍部分国家工伤保险差别费率情况;通过对相关数据的分析,提出我国工伤保险差别费率分类应以行业工伤事故死亡风险、重伤和轻伤风险、职业病风险和基金支出情况为指标和依据,尤其不能忽视行业轻伤和职业病风险指标;计算了我国近几年各行业工伤事故的个人死亡风险。建议:增加行业风险类别和工伤保险费率差距范围;完善工伤事故、职业病和工伤保险统计指标体系;工伤保险基金应加大对预防、康复、科研、教育培训工作的投入。     

Simulating pesticide leaching and runoff in rice paddies with the RICEWQ-VADOFT model

There is a current need to simulate leaching and runoff of pesticide from rice (Oryza sativa L.) paddies for assessing environmental impacts on a valuable agricultural system. The objective of this study was to develop a model for determining predicted environmental concentration (PEC) in soil, runoff, and ground water through the linkage of two models, rice water quality model (RICEWQ) and vadose zone transport model (VADOFT), to simulate pesticide fate and transport within a rice paddy and underlying soil profile. Model performance was evaluated with a field data set obtained from a 2-yr field experiment in 1997 and 1998 in northern Italy. The predictions of amount of pesticide running off from the paddy field and accumulating in the paddy sediment were in agreement with measured values. Leaching into the vadose zone accounted for approximately 19% of the applied dose, but only a small amount of chemical (<0.1%) was predicted to reach ground water at a 5-m depth due to sorption and transformation in the soil. The permeability of the soil and the water management practices in the paddy field were shown to have a strong influence on pesticide fate. These factors need to be well characterized in the field if model predictions are to be successful. The combined model developed in this work is an effective tool for exposure assessments for soil, surface water, and ground water, in the particular conditions of rice cultivation.     

设备检修中的伤害特征与防范措施

针对设备检修中伤亡事故的多发问题,根据有关冶金企业伤亡事故统计情况,对设备检修中主要的危险危害因素及伤害特征进行了分析,在此基础上,就如何防止检修中的伤亡事故提出了防范措施。