攀枝花细粒钛铁矿混合药剂浮选研究

通过对攀枝花细粒钛铁矿物质组成的研究，提出了利用混合药剂浮选细粒钛铁矿的技术措施。结果表明，苯乙烯膦酸与２号油按４：１比例混合使用，浮选效果最好，经三次精选，可获得了ＴｉＯ２品位４７．２２％，回收率７４．５８％的钛精矿。     

电力市场化改革中的终端电力能源效率问题

提高终端电力能源效率,是实现电力可持续发展的重要保障。然而,从我国电力市场化改革的进程来看,终端电力能源效率问题在很大程度上被忽视,甚至还受到了一定的负面影响。如何将终端电力能源效率问题综合纳入电力改革进程,采取妥善的应对措施促进终端电力能源效率的持续提高,是我国电力改革所面临的一项重大挑战。本文试图分析英、美两国电力市场化改革中针对终端电力能源效率问题所采取的政策措施,并探讨其对我国的启示意义。     

住宅建筑能耗的特点及其评价指标的确定

本文首先回顾了国际上对于住宅建筑能耗的研究工作,然后对住宅建筑能耗的特点进行了分析,指出在研究的初始阶段,可以使用单位地板面积上的能耗等指标作为住宅建筑能耗的评价指标,但是由于这些指标都是针对某一特定的能耗系统提出的,因而都具有一定的局限性,所以如何确定一个更为全面、更为客观的评价指标仍是今后的一个研究内容。     

An economic input-output analysis for urban stormwater quality planning

A new approach using input-output techniques is proposed for the analysis of urban stormwater pollution caused by urban land development. The input-output model provides projections of sectoral outputs within an urban region. By defining land as an input to production, these output projections may be translated into projections of commercial and industrial land development. Furthermore, the closed version of the input-output model is used to project residential land development as a function of projected wage income. The pollutant generation in urban stormwater is related to the quantity of each category of land development by a pollutant coefficient matrix. Thus, the model can be used to predict the impact of various economic growth scenarios on pollution loadings in runoff water. This will help planners in assessing the environmental costs of various scenarios, and in preparing for remedial actions. A numerical example is provided to illustrate the applications of the model.     

耕地后备资源评价中地形坡度指标获取方法分析

"人多地少"是我国的基本国情,耕地的大量抛荒及不合理使用导致我国耕地资源严重不足。为了缓解国家粮食安全问题,耕地后备资源成为了耕地的重要补充来源,也是实现占补平衡的保障。地形坡度作为评价指标必不可少的评价因子,文章对其获取方法进行了分析研究。利用GIS技术为支撑,通过对不同类型数据处理分析实现地形坡度指标值的获取,并结合数据处理规则,研究数据快速可行的处理方法,为今后相关工作提供技术支持及参考依据。     

航空相机检测仪系统的设计与实现

航空相机是一种重要的机载光电设备,在航空对地测绘等领域有着较为广泛的应用,为方便、直观地对航空相机进行地面检测,设计和实现了一种配套某型航空相机的检测仪系统。根据航空相机地面保障设备任务书和相机与地保设备通讯协议,给出了检测仪系统的功能需求。根据相机的接口要求和系统计算能力的要求,设计了检测仪系统的硬件方案。根据软件部分的功能需求,提出了一种新的分层架构,同时详细论述了软件系统的关键技术,描述了程序的运行流程,给出了检测仪系统的软件设计方案,并在VC6.0环境下实现了检测仪软件系统。针对检测仪的工作方式,设计了测试流程,并根据流程对检测仪进行了详尽的测试,经多次测试,检测仪工作正常。测试结果表明,检测仪系统满足了对其功能的全部要求,运行稳定,操作简便,显示直观,可以应用于航空相机地面保障任务。     

基于地下水安全的井渠结合灌区节水潜力分析——以永定河流域张家口段为例

农业节水潜力是确定节水灌溉发展方向以及解决水资源短缺问题的关键参量。为探究永定河流域张家口段井渠结合灌区的节水潜力,将农业节水潜力分为管理节水潜力与工程节水潜力两类,通过引入地下水安全性检验方法,避免井渠结合灌区实现节水潜力后存在地下水超采风险,建立了满足地下水安全的井渠结合灌区节水潜力分析方法。结果表明：永定河流域张家口段大中型灌区现状灌溉用水总量为1.62×10⁸ m³,以常规方法估算的地表水节水潜力为0.805 9×10⁸ m³,考虑地下水安全的地表水节水潜力修正为0.795 4×10⁸ m³,其中管理节水潜力和工程节水潜力分别为 0.610 5×10⁸和0.185 0×10⁸ m³,分别占比76.7%和23.3%,管理节水潜力所占比重较大。永定河流域张家口段大中型灌区的管理必须改变以往重工程建设轻灌溉管理的理念,才能更大程度地挖掘管理节水潜力。研究结果可以在保证井渠结合灌区地下水安全的前提下,对灌区的管理节水潜力与工程节水潜力的占比进行科学评价,对未来灌区灌溉工程规划和建设等方面具有现实的参考意义。     

浅析2020年前美军事战略重点的转变--从装备发展看美国军事战略重点可能的变化

美国21世纪前期的军事战略重点将是争夺外空优势，夺取制天权和制信息权。分析了美国夺取外空优势的原因，及其为夺取外空优势在国家政策、航天发展和技术准备等方面采取的措施。     

The role of substance use and psychosocial characteristics in explaining unintentional injuries

The objective of this study was to examine the relationship between the use of various substances and selected psychosocial characteristics with unintentional injury. Cross-sectional data was collected from groups of subjects in treatment for a primary problem with cocaine (n = 300), cannabis (n = 128), alcohol (n = 110), other drugs (n = 35), tobacco (n = 249), or gambling (n = 199). Subjects completed a self-administered questionnaire that included questions on various psychosocial scales (i.e., risk-taking/impulsivity, chronic stress, coping, and social supports), frequency of drug and alcohol use, and unintentional injuries in the year prior to treatment. For the univariate analyses, both frequency of cocaine and cannabis use, risk-taking/impulsivity, stress, and coping were significantly related to injuries. For the multivariate analyses, only risk-taking/impulsivity, stress, age, and sex were significantly related to injuries. The results provide important information regarding factors associated with reported injuries among individuals in addiction treatment.     

Developing English domestic occupancy profiles

ABSTRACT

Occupancy patterns are necessary to estimate energy demand and evaluate thermal comfort in households. Because of this, many European countries are developing representative domestic schedules to replace outdated criteria. This paper evaluates the state of knowledge of UK domestic occupancy patterns and develops new domestic occupancy profiles for England. The presented research (1) characterizes methods for collecting occupancy data and inferring patterns; (2) identifies and assesses the quality of categories of occupancy patterns used in building simulation; and (3) develops updated occupancy profiles. A systematic scoping review identified social and monitoring surveys as the most deployed data-collection methods. A systematic literature review also established that the occupancy categories most frequently used in UK building simulation are (a) a family with dependent children where the parents work full time; and (b) a retired elderly couple who spend most of their time indoors. The interview sample from the English Housing Survey 2014–15 was used to map household typologies. Results show that categories (a) and (b) combined amount to only 19% of England’s households, which suggest models are over-reliant on these groups. Considering this result, the paper develops occupancy patterns for England derived from 2015 UK Time Use Survey diaries for each household typology previously identified.