浅析自动扶梯超速与非操纵逆转保护装置检测的几种方法

文章针对自动扶梯的超速与非操纵逆转保护功能的检测,介绍了“人为动作开关法”、“人为切除信号法”、“盘车法”、“电动机反接法”、“串接空气开关法”、“工况模拟法”等几种方法的原理、应用范围、优缺点,并从通用性、功能、准确性和定量性方面进行了比较,最后总结出“工况模拟法”具有通用、准确、可靠、可定量检测的特点。     

职业病危害预评价中某调漆间防护设施的分析与评价

建设项目职业病危害预评价以职业病危害因素的识别和分析为基础,重点对职业病防护设施设置的符合性和有效性进行分析和评价。以某调漆间职业病危害预评价为例,对调漆间可能存在的职业病危害因素进行了识别和分析,通过检查表法对职业病防护设施设置的符合性进行了分析和评价;在防护设施设置符合性分析与评价的基础上,逐一对职业接触限值、控制风速等职业病防护设施有效性评价指标进行了分析与评价,并提出了在调漆操作位应设置吹吸式通风装置或通风柜的建议。     

负压防护急救车车厢内生物污染物运动扩散的数值模拟与试验验证

为掌握负压防护急救车车厢内生物污染物的分布情况,运用计算流体动力学(CFD)方法和拉格朗日颗粒随机轨道模型,对该车车厢内生物污染物的运动扩散进行数值模拟;并通过试验对比研究车厢内污染物浓度场的分布状态,试验与模拟的结果基本一致。同时表明:该随机轨道模型较好地反映生物污染物运动扩散的时空分布特点;负压防护急救车车厢内污染物浓度较高,医护人员应穿戴有效的个人防护器材。     

南京典型古建筑的消防现状调查和消防对策

通过对江苏南京代表性古建筑朝天宫、甘熙故居、鸡鸣寺和净觉寺的实地深入调查,从结构、材料、内容、布局和环境等方面分析了古建筑普遍存在的火灾危险性,考察了古建筑中现代消防设施建设、消防资金投入、消防管理措施和现代消防材料和技术应用的现状,发现多数古建筑在消防防护方面仍处于保守、常规、落后和消极的状态。为实现对古建筑价值的最大限度保护,应从消防安全布局、消防站建设、消防通道设计、消防给水供应、消防通讯保障、消防装备配置等方面进行性能化设计和规划;在遵循“修旧如旧”的修缮和维护原则下,需要勇于尝试和接纳纳米材料等新型化学保护材料和技术。     

CHANNEL MORPHOLOGY EVOLUTION AND OVERBANK FLOW IN THE GEORGIA PIEDMONT1

ABSTRACT: Historic changes in stream channel morphology were investigated in the Georgia Piedmont to better understand the hydrologic processes and functioning of the region's riverine systems. USGS gaging station data and channel geomorphology data were collected from thirty study sites in the Upper Oconee River Basin for flood frequency analysis. Historic and modern (i.e., present-day) channel capacity discharge (i.e., overbank flow) was calculated using Manning's equation and historic channel cross-section records. The recurrence interval for overbank flow was estimated for each site from flood frequency data. Results indicate that channel expansion has occurred throughout the basin, especially in upper reaches. Recurrence intervals for modern overbank events were variable and generally high ranging from < 2 to > 500 years for first to third order streams. They were less variable and lower for fourth and fifth order streams, ranging from < 2 to 3 years. Potential depositional thresholds were identified that exemplify the complex response of sediment distribution patterns throughout the basin. Results indicate overbank flows occur less frequently now than they once did due to historic accelerated sedimentation and subsequent channel expansion. One application of these findings is that these basin processes are likely applicable across the region and may impact the hydrologic functioning of associated Piedmont riverine wetlands that depend on flooding regimes.     

生态旅游发展策略及有关问题探讨

本文综合现有文献资料,在确定“生态旅游”的概念和特征的基础上,结合近年我国自然保护区生态旅游实践,指出目前在生态旅游发展过程中存在的主要问题,并提出了开展生态旅游应遵循的原则和生态旅游资源的保护对策。     

锅炉集中供热系统冷凝水处理技术研究与应用

在以蒸汽为热源的区域供热中 ,冷凝水回收过程的系统防腐是个普遍的难题。本文论述了将多种挥发性有机胺混合使用的“中和胺防腐技术”应用于蒸汽冷凝水回收的理论探讨和应用中的技术创新 ,以及所取得的显著经济效益和环境效益。     

Ranking ecosystem services delivered by trees in urban and rural areas

Policies and strategies for tree management and protection on a national, regional, and local level have not sufficiently considered differences between rural and urban areas. We used expert knowledge to compare rural and urban areas in a case study evaluating the relative importance of ecosystem services (ES) in policy development. The Analytic Hierarchy Process (AHP) and focus group discussions were used to rank 17 ES, representing four classes of services: provisioning, regulating, habitat, and cultural. The results indicated that effective protection strategies, beyond simply increasing general tree cover, should consider specific benefits trees provide to local communities. We discuss the role of objective prioritization of ES delivered by trees in urban and rural areas and their consequences for decision-making processes.Supplementary InformationThe online version contains supplementary material available at 10.1007/s13280-022-01722-2.     

加强环境保护打破绿色贸易壁垒

本文通过分析绿色壁垒对我国外贸的影响，从政府和企业的角度提出了相关的政策建议。     

政府在环保产业发展中的作用

本文立足于我国市场经济体制不完善的现实，指出发展我国环保产业，政府应发挥主导作用，并提出了促进我国环保产业发展的政策对策。