丝瓜汁饮料的研制

介绍了丝瓜汁饮料的加工工艺，分析了架热温度、pH对丝瓜汁澄清效果的影响。     

碳含量对LiFePO4/C复合正极材料性能的影响

Olivine-type LiFePO4/C composite cathode materials were synthesized by a solid-state reaction method in an inert atmosphere. The glucose was added as conductive precursors before the formation of the crystalline phase. The effects of glucose content on the properties of as-synthesized cathode materials were investigated. The crystal structure and the electrochemical performance were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, laser particle-size distribution measurement and electrochemical performance testing. The material has a single crystal olivine structure with grain-sizes ca. 100-200 nm. SEM micrographs and the corresponding energy dispersive spectrometer （EDS） data confirm that the carbon particulates produced by glucose pyrogenation are uniformly dispersed among the LiFePO4 grains, ensuring a good electronic contact. Impedance spectroscopy was used to investigate the ohmic and kinetic contributions to the cell performance. It is found that increasing the carbon content leads to a reduction of the cell impedance due to the reduction of the charge transfer resistance. The galvanostatically charge and discharge tests show that the material obtained by adding 10% C （by mass） gives a maximum discharge capacity of 140.8mA·h·g^-1 at the same rate （C/10）. The material also displays a more stable cycle-life than the others.     

铁路建筑暖通空调设计综述

选择铁路建筑中具有代表性的三类建筑,即公共建筑中的铁路客站、工业建筑中的动车段及数据中心,对其暖通空调系统的使用特点及冷热源形式、空调形式等进行了总结和分析,并指出了存在的问题。介绍了工程设计实例。     

地板辐射供暖系统热工性能实验研究

基于对采用PFLB管材、等密度双回型铺设方式的低温地板辐射供暖系统的实验研究，得到该系统散热量与流量及供水温度关系的热工特性曲线，发现随着流量的增加，散热量对管路内平均流速的变化率呈减小趋势。通过与传统柱型散热器热工特性对比及实验数据拟合，给出了供水温度为30～60℃、水系统流量为0．03～0．60m^3／h时，该系统散热量的计算公式，并验证了公式的有效性。     

北京南站冷热电三联供系统探讨

介绍了北京南站冷热电三联供系统设计,包括方案选择、负荷计算、系统配置、运行策略、节能分析等。认为使用燃气内燃机比燃气轮机更具优势,建议在电力并网前提下采用以电定热原则确定系统设备容量配置。     

Effect of Carbon Content on Electrochemical Properties of LiFePO_4/C Composite Cathode

Olivine-type LiFePO_4/C composite cathode materials were synthesized by a solid-state reaction method in an inert atmosphere.The glucose was added as conductive precursors before the formation of the crystalline phase.The effects of glucose content on the properties of as-synthesized cathode materials were investigated.The crystal structure and the electrochemical performance were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),laser particle-size distribution measurement and electrochemical performance testing. The material has a single crystal olivine structure with grain-sizes ca.100-200 nm.SEM micrographs and the corresponding energy dispersive spectrometer(EDS)data confirm that the carbon particulates produced by glucose pyrogenation are uniformly dispersed among the LiFePO_4 grains,ensuring a good electronic contact.Impedance spectroscopy was used to investigate the ohmic and kinetic contributions to the cell performance.It is found that increasing the carbon content leads to a reduction of the cell impedance due to the reduction of the charge transfer resistance.The galvanostatically charge and discharge tests show that the material obtained by adding 10% C(by mass)gives a maximum discharge capacity of 140. 8mA.h.g~(-1) at the same rate(C/10) .The material also displays a more stable cycle-life than the others.     

冷热电三联供在北京南站的应用

通过北京南站项目的设计实践．研究了北京南站冷热电三联供系统的设计思路和方法，对系统优化配置、运行策略等方面给出了研究成果，并对系统的节能性、环保性和经济性进行了探讨。     

六层非对称框架结构大楼控制爆破拆除

根据爆破楼体为非对称框架结构的力学特征和作业空间狭窄、周围环境极其复杂、安全要求高的特点，应用控制爆破理论和技术，对位于盘锦市闹市区长２０．５ｍ、宽１７．５ｍ、高２４ｍ的六层浇筑框架结构的紫澜门大楼成功地进行了定向爆破。在本次爆破中，我们对爆破方案进行了系统的技术论证和爆破参数深化计算，并在爆破施工中采取了有效的安全防护措施和爆破地震效应观测，取得了理想的爆破效果，为今后类似工程提供了技术依据。     

北京南站高架层环形车道汽车尾气计算机模拟分析

通过CFD模拟计算给出了北京南站高架层环形车道夏季最不利条件下各区域的空气品质.结合国家标准<环境空气质量标准>和香港环保署颁布的<半封闭式公共交通换乘站地区空气污染控制>要求,分析了环形车道内的污染物浓度分布,认为其空气品质基本满足安全卫生要求.根据模拟计算给出了新风取风口的设置位置.     

新型空气过滤器检测系统

提出一套将高效过滤器检测系统与一般通风用空气过滤器检测系统合二为一的过滤器性能检测系统的方案，效率检测采用计径计数法，并按此方案搭建了实验装置。经实验，该测试系统及检测结果均符合过滤器测试要求，可实现自动化检测，检测更方便，测试结果更可靠。