关于选择前室加压送风系统形式的计算分析

针对<高规>中,对于前室或合用前室加压送风口开启控制方式没有明确规定这一问题,采用压差法和流速法计算典型前室的加压送风量,证明规范给定的风量宜用于设置常开型风口的加压送风系统.     

浅谈高层建筑机械加压送风风量计算

本文以实际工程为例,阐述了高层建筑机械加压送风风量的计算方式.     

小煤矿现场风量实测调节法

井下风量调节是矿井通风日常管理的主要内容，对于小煤矿而言，采用现场风量实测调节法具有方法简单、易于操作掌握的优点。本文介绍了现场实测风量调节方法，并提出了几点技术要求。     

建筑防排烟设计中的几个常见问题探讨

对建筑防排烟设计中某些未予明确之外进行了探讨,对地下车库、地下房间、挡烟垂壁、地下防烟楼梯间、前室、合用前室等区域的防排烟设计给出了若干思路和方法.     

氮气加压熔炼高氮钢技术的研究进展

在综述氮气加压熔炼高氮钢技术的基础上,指出了大熔池法（BSB）适合于工业化大规模制备高氮钢;并基于国内几十年来电渣冶金技术的丰富经验,提出了采用电弧渣重熔（ASR）和加压电弧渣重熔（ASRP）技术生产高氮钢是目前较为可行的技术方案。     

生物氧化提取黄金技术的发展现状及其应用

三种生物提金技术方法及其应用情况　　目前,世界上利用生物氧化提金的方法有三种,基本上都是利用细菌在搅拌槽中浸出黄金。其中BIOX法和MINBAC法在南非研究开发成功,BacTech法由澳大利亚应用成功。下面分别介绍这三种方法的技术研究开发和应用情况。　　1.BIOX法　　70年代末南非Gencor公司工艺研究实验室开始着手生物提金研究,已故该实验室主任EricLiveseyGoldblatt是这一领域的先驱。他实验室培养成功的菌种经中试获得成功,其称为BIOX法的技术比焙烧和加压浸出简单。该工艺分几个步骤,先将矿石破碎并磨成便于从脉石中解…     

波兰的通风管理综合技术

一、通风 (一)矿井采掘洞室风量计算方法波兰矿山救护总站目前主要是采用两种方法来计算矿井风量:其一是考察煤的瓦斯含量和井深条件,按吨煤所需风量计算,是估计矿井所需总风量的大概数值。其二是按矿井各采掘洞室及通风巷道等分别计算风量。即考虑瓦斯涌出量,参加井下生产最多人数,按每人每     

建筑消防给排水设计中值得注意的几个问题

结合多年建筑消防给排水设计的经验，对消防电梯间前室消火栓设置、屋面消火栓布置、消防卷盘布置、报警阀进出口设置信号阀、正确设置自喷末端试水装置、消防增压泵设置及消防用水时地下室排水等问题进行阐述，供设计参考。     

干海子螺旋隧道施工通风技术

本文介绍了四川省雅泸高速公路C20标段干海子小半径螺旋曲线隧道钻爆法施工中通风的设计、计算与实施.其主要内容为本工程隧洞施工中通风的标准,风量的计算,通风设备的选择,通风系统的布置以及提高通风效率措施等.     

浅谈多风井多风机分区并联通风

在煤矿生产和建设阶段，当一台扇风机不能保证矿井需要风量时，就有必要利用两个或两个以上的风机共同工作，以达到增加风量的目的。     

我国城市间航空客运量影响因素的实证分析

城市间航空客运需求是航空公司航线网络布局时需要参考的重要信息。文章分析了影响城市间航空客运量的因素,建立了描述城市间航空客运量的半对数形式的线性计量经济模型,并使用我国2002年的352个城市对的横截面数据对模型进行了估计。分析结果表明,城市间距离、机场旅客吞吐量、人口密度、邮政电信业务总量、人均拥有公共交通车辆数以及城市性质和GDP相比,与城市对航空客流有着更为密切的相关关系。文中所建立的城市对客运量的回归模型可以作为航空公司进行航线需求分析的基础。     

国家生态文明建设与空气质量改善——来自合成控制法与DID的双重验证

生态兴则文明兴,生态环境关系着生态文明体系的构建。2014年,我国设立第一批生态文明先行示范区,为生态文明建设在环境质量方面的成果评价提供了准自然实验环境。为了评价我国生态文明建设在空气质量改善方面的绩效,将江西、福建、贵州、云南和青海这5个省级生态文明先行示范区设定为处理组,运用合成控制法和DID模型对空气质量改善状况进行双重检验。结果表明:整体上,生态文明先行示范区建设对空气质量改善具有显著的效果;江西、贵州和云南的生态文明先行示范区建设均表现出对环境质量的改善作用,其中江西生态文明建设对空气质量改善成效尤为显著。因此,我国设立生态文明先行示范区对于空气质量改善具有显著效应,这对今后国家生态文明试验区建设尤其是在社会经济、资源环境等方面的协调发展具有重要的参考价值。     

The effects of high-speed rail on air passenger transport in China

This study investigates the effects of high-speed rail (HSR) on China’s air passenger transport from the perspective of airports. The difference-in-differences approach is used with unbalanced panel data of 206 airports over the period from 2006 to 2015. Our estimation results found that the negative effects of HSR on the growth rate of China’s air passengers is both statistically and economically significant. However, these adverse effects are not catastrophic.     

The value of health benefits from ambient air quality improvements in Central and Eastern Europe: An exercise in benefits transfer

This study is an initial effort to estimate one important category of benefits of environmental improvements in Central and Eastern Europe (CEE), those related to the effects of air pollution on human health. Our estimates are derived from data on ambient air quality in selected CEE locations, together with a model that links these ambient conditions to physical impacts on health and attaches economic values (in dollar terms) to these impacts. Given data limitations, our focus here is on three pollutants: particulates (PM), sulfur dioxide (SO₂), and lead (Pb). Our data set includes ambient concentrations for these pollutants in four CEE countries: Bulgaria, Hungary, Poland, and Ukraine.Given the ambient data, dose-response functions taken from the clinical and epidemiological literature in the U.S., Canada, and Western Europe are used to generate estimates of the change in physical effects. These effects then are given an economic value by applying two approaches for scaling unit valuation figures applicable to the U.S. A Monte Carlo model is constructed to propagate the uncertainties of the dose-response functions and unit values to obtain confidence intervals on the total benefits from pollutant reductions in each country. We examine scenarios where the CEE countries improve ambient conditions for the pollutants in question to meet European Community (EC) standards and then compare these scenarios to ones involving uniform percentage ambient reductions across locations in each country.     

Valuing The Beneficts of Air Pollution Abatement Using a Health Production Function A Case Study of Panipat Thermal Power Station, India

The Indian economy today is highly prone to industrial pollution and ismaking compliance decisions in order to meet environmental standards.Environmental regulations impose significant costs upon industry that arefairly high and, therefore, require economic justification. This justificationcan be given by estimating the benefits associated with these costs. Whilethe scientific rationale behind air quality preservation is well understood,its economic rationale for a developing country like India, has to beverified. The objective of the present paper is to estimate the economicvalue that people in an urban area in India (Panipat Thermal Power Station(PTPS) Colony in Panipat, Haryana) place upon improving the air quality.The dose-response method, based on the Gerking and Stanley (1986) model,is used to estimate the economic benefits of air quality improvement. Theseestimates range from one to two percent of monthly income. Income andhealth status variables were significant determinants of peoples'willingness to pay (WTP) for air quality improvements. This lends supportto the neo-conventional wisdom `act now to protect the environment beforeit is too late'. These people are ready to pay for environmentalimprovements. We do believe, however, that the relatively successfulapplication of the dose response method at PTPS colony suggests that thetechnique can be more widely applied in developing countries like India.     

Valuing Air Quality in Poland

In this study we estimate how much Polish citizens would be willing to pay to harmonize Polish air pollution standards with EU standards. We conduct a contingent valuation of all damage components using a system of dichotomous choice questions. This system approach helps to avoid embedding problem and to identify protest voters. We compare estimates from a set of single logit models with a generalized estimating equations (GEE) model, which provides more parsimonious and efficient estimates. Although, health remains very important, our respondents valued mortality less than the literature but morbidity much more. Damages to ecosystems and cultural heritage compose 13–16% of the total value and their omission by the literature seriously underestimates total benefits. Overall, the results suggest that Poland values the benefits of pollution control much less than the wealthier EU suggesting harmonization should be postponed and conditioned on economic prosperity.P28, Q51, Q53 standard harmonization, system valuation     

Cooling China： The Weather Dependence of Air Conditioner Adoption

One of the major adaptation mechanisms to climate change is increased demand for cooling via the air conditioning of indoor environments. China＇s demand for air conditioners has displayed explosive growth since 1995. This paper provides estimates of the income and short run weather sensitivity of air conditioner adoption across urban areas for 29 Chinese provincial entities. We show that the adoption decision displays significant income and weather sensitivity in the short run, with adoption being higher the year following a hot summer.     

浅析居室内空气品质对人体健康的影响及其改善途径

笔者通过分析产生居室内空气品质问题的原因,说明居室内空气品质对人体健康的影响,提出了切实可行的改善居室内空气品质的途径。     

The Value of Clean Air in China： Evidence from Beijing and Shanghai

We estimate the willingness to pay （WTP） of Beijing and Shanghai residents for improving the air quality of the two cities from their levels prior to the 2008 Beijing Olympic Games to the level achieved during the Olympics. The data are obtained from a contingent valuation study conducted through face-to-face interviews in June 2008 in Beijing and Shanghai prior to the Beijing Olympics, during which time there was intensive debate about Beijing＇s air quality. Residents in both cities are willing to pay more when they are more exposed to air pollution, when their disposable income increases, and when they have stronger beliefs that public opinion plays an important role in government policy making. Beijing residents are willing to pay more than Shanghai residents, due possibly to Beijing＇s poorer air quality. Overall, aggregate WTP for air quality improvement accounts for about 0.53% of the 2008 GDP in Beijing and 0.22% of the 2008 GDP in Shanghai.     

我国航空货运网络结构研究

选取国内空港130个、航线317条,国际空港72个、航线237条,从空港和航线两个角度探讨我国航空货运机场分布格局和网络结构,结果发现:华东区、华北区、中南区是航空货物的主来源地、目的地和中转地,上海、广州和深圳、北京构成我国航空货运的"三极",形成货运三角;航空货运主要分布在少数枢纽空港间的航线上,呈现集中状态,前五位航线的货运量之和为43.83万t,占27.33%;航空货运高度集中在人口100万以上的城市间,人口100万以下的城市间航空货运联系很弱,所占市场份额之和不足1%,中等城市之间、大城市与中等城市、小城市之间无直航航线联系;我国对外航空货运联系主要集中在北美、日韩、西欧和港澳地区,与东欧、中东和南亚地区的航空货运联系较弱,与非洲和拉美地区目前还没有直通航班。