基于用户场景的装配式阳台装修系统设计研究

目的 构建一套基于用户场景的装配式阳台装修系统解决方案。方法 以装配式阳台系统体系构建为目标,从装配式阳台系统的设计方法、概念、架构、系统模块等方面,对装配式阳台系统进行全面系统的探讨。结果 得出装配式阳台系统由四大基装系统、八大选装系统、三大加载系统构成。结论 装配式阳台系统包括装配式阳台基装系统、装配式阳台选装系统、装配式阳台加载系统。其中基装系统包括:顶面系统、墙面系统、地面系统、封阳系统。选装系统包括:家政模块、晾晒模块、休闲模块、绿植模块、办公模块、健身模块、厨房辅助收纳模块、卧室辅助收纳模块。加载系统包括:智慧照明系统、智慧安防系统、智慧遮阳系统。随着“双碳”目标、大数据、人工智能、新型生活方式的发展,兼顾标准化、工业化、个性化、智能化的多元阳台生活场景的系统解决方案将会得到快速发展。     

用电信息采集系统的设计与建设

针对用电信息采集系统的建设任务,以采集系统为中心,详细介绍了系统主站的软硬件设计、采集系统功能设计、系统与其它系统的接口设计、系统建设规模、售电系统改造。     

BEPC Ⅱ注入器真空系统改造

注入器真空系统的改造由为各种微波功率源系统服务的真空系统和常规真空系统组成,根据实践工作中的着重点,详细介绍了注入器真空系统工作特点,并从原理及工艺上对各种新改造的子系统如电子枪真空系统、正电子源真空系统、速调管真空系统和常规真空系统给予说明,并简单介绍了BEPC Ⅱ注入器真空系统现在的工作状态.     

建筑漏电火灾报警系统安装与调试分析

文章结合漏电火灾报警系统系统的组成与功能,简单介绍了漏电火灾报警系统与火灾自动报警系统的区别,突出了漏电火灾报警系统系统的优势,着重分析了该系统在现场施工中时的安装工艺的注意事项,重视系统的调试运行。     

电视电话会议系统组成及操作设置

近年来,国内和国际的交流日益增多,DCN（数字会议系统）和电话电视会议的发展非常迅速,并逐渐在政府机关单位、会议中心和企业集团中广泛应用。会议讨论系统、同声传译系统、扬声器系统、录放音系统、拾音系统,以及表决系统都包含于会议系统中。这类系统在进行视频交流的同时,通过电脑控制和存储会议中的所有资料。本文主要阐述了电视电话会议系统的组成以及系统中音频、视频、DCN等系统设备的功能描述、操作设置等内容。     

视频监控系统

视频监控系统包括模拟视频监控系统、数模混合视频监控系统和网络视频监控系统。其中,模拟视频监控系统几乎被完全淘汰,数模混合视频监控系统成为主流监控系统。网络视频监控系统基于网络平台,采用模块式系统构架和分布式安全存储系统,系统扩容简单,使用方便,相对于模拟视频监控系统有巨大的优势。网络视频监控系统取代模拟视频监控系统仅仅是一个时间问题。     

二级再生氨-盐吸收制冷系统的改进与比较

提出了二级再生氨一盐系统（系统1）的改进系统（系统2和系统3），将系统1和系统2、系统3的热力学模拟结果进行了分析比较。两种改进系统的最高操作压力都在0．2MPa以下，远低于系统1的最高操作压力。改进系统的操作性能都有显著提高，系统2的COP值升高幅度和循环倍率降低幅度都是最大，烟效率也有显著提高；系统3的COP值也有较大的提高，炯效率提高最为显著，但循环倍率反而较系统1明显升高。系统1和系统2均可在加热温度低于160℃时稳定操作，而系统3则适于加热温度高于160℃的情况。当被冷却系统需要在0℃以下的恒定温度下提供冷量时，适用系统1制冷。当物料需要在冷却水冷却后再逐渐降温至所需要的温度时，适用改进后的系统。     

中央空调楼控系统的维护与管理

楼宇自动化系统（BAS）又称建筑设备自动化系统,主要是用以对建筑物内的空调系统、给排水系统、照明系统、变配电系统以及电梯等系统设备进行集中监视、控制与管理的综合系统。本文试图对中央空调楼控系统的维护和管理进行阐释,以进一步提高对楼宇自控系统的认识。     

通信电源设备的运行安全探讨

通信电源系统是对通信局站各种通信设备及建筑负荷等提供用电的设备和系统的总称。主要由备用发电系统、高压供电系统、变压器系统、不间断电源系统、后备电源系统、直流系统、接地防雷系统以及动力环境监控系统等多个子系统组成。通信离不开电源,通信电源是通信的保障,所以保证通信电源系统的安全运行,对保证通信系统的畅通乃至通信的安全有着积极的意义。     

多媒体会议系统的技术研究

随着以计算机技术为中心的多媒体技术的普及和发展,给会议工作带来了新的手段和方法,视频会议、远程教学等可视化信息技术在会议室领域得到广泛应用,多媒体会议系统以其功能的多样性得到迅速普及。多媒体会议系统主要由视频显示系统、音响扩声系统、矩阵切换系统、数字会议讨论系统、智能集中控制系统、环境控制系统组成;随着人们对商务沟通的要求越来越高,对于多媒体会议室的设计,逐步将音视频会议系统、交互式电子白板系统、多画面分割处理系统、数字媒体发布系统、会议签到系统、自动跟踪摄像系统、手机同屏系统、视频展台、条幅升降系统、视频直播系统等融入进去,使得会议室功能更强,沟通更快捷。     

热交换器的分类及优缺点分析

热交换器是将不同温度介质之间的热量通过热传导的形式,由高温介质传递给低温介质,使介质达到生产所需温度的工艺设备,也可作为一种节能设备使用.通过对不同热交换器的结构分析,总结不同热交换器的优缺点、适用环境,为生产工艺设计人员及设备制造单位在选择可降低能耗、提高效率的设备上提供参考.     

聚苯胺及其复合物的制备和结构及形貌分析

通过化学氧化法分别制备盐酸,盐酸和十二烷基苯磺酸,碳纳米管(MWNTs-COOH)掺杂的聚苯胺,利用红外光谱,紫外光谱,扫描电子显微镜和透射电子显微镜对所制备聚苯胺的结构和形貌进行分析。分析不同掺杂物对聚苯胺的结构和形貌的影响;同时研究了超声波作用对聚苯胺形貌以及聚苯胺包裹MWNTs-COOH情况的影响。     

Thermodynamic similarity and prediction of the properties and characteristics of substances and processes

Principles of the theory of thermodynamic similarity are considered in application to all aggregate states of a substance, including phase transitions, and to the change in dissipative structures in open systems.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 53, No. 5, pp. 709–716, November, 1987.     

Modelling and computation of curing and damage of thermosets

The curing of thermosets is a complex process involving the transition from a fluid into a (visco-) elastic solid. This phase transition comes along with an increase in stiffness and a volume shrinkage of the polymer. The latter may lead to severe residual strains and stresses, which in turn can cause damage in the final, usually quasi-brittle material. In this contribution a constitutive model is developed which takes into account the curing of a thermosetting material together with the process-induced damage as resulting from curing shrinkage. The curing of the material is governed by a phenomenological hypoelastic constitutive equation which includes temporal evolutions for stiffness and volume shrinkage. Thermal and viscous effects are neglected in the present study. An isotropic gradient-enhanced damage model is adapted to describe the damage evolution. The curing-damage model is implemented into a finite element code and numerical examples for thermosetting materials demonstrate that the proposed model is capable to predict cure-induced damage in thermosets.     

碳化硼陶瓷增韧补强和致密化研究现状及其展望

碳化硼陶瓷具有极高的硬度,然而其低韧性、低抗弯强度、难以致密化限制了它的广泛应用.已有一些研究集中于碳化硼陶瓷增韧补强和致密化,对这一方面国内外研究进展进行了归纳与评述,阐明各种增韧补强和致密化方法的优缺点,提出碳化硼陶瓷增韧补强和致密化研究值得发展的一些方向.     

Measurement and analysis of elastic and anelastic properties of alumina and silicon carbide

Measurements of dynamic Young's modulus, E, and damping as a function of temperature, T, were made for alumina and silicon carbide. The Young's modulus data were compared with some from the literature, and analysed in terms of a theoretical framework relating the Debye temperature, θD, with the elastic constants. For both materials this analysis yielded a ratio T₀/θ_D which was near 0.4, where T₀ is an empirical fitting constant for the plot of (E(0)−E)/T versus 1/T (E(0) is the value of E at 0 K). The analysis of the damping data in terms of an Arrhenius type dependence led to effective activation energies near kT, where k is Boltzmann's constant. This revised version was published online in November 2006 with corrections to the Cover Date.     

Mechanisms of Corosion and Oxidation of Metals and Alloys

Selected topics in field of the study of the mechanisms of corrosion and of oxidation of metals or alloys are presented. The first part reports a new model for the mechanism of the breakaway oxidation of ferritic stainless steels in water vapour. The second part is devoted to the physico‐chemical aspects of oxidation and presents experimental methods useful in the kinetic modelling applied to two alloys, the zircalloy‐4 and an AlMg5 % in the liquid state. In the third part the physical and numerical modelling of the stress corrosion cracking behaviour in face‐centered cubic (fcc) alloys is detailed, which enables the study of the influence of macroscopic parameters (such as the temperature or hydrogen activity) on the fracture process.     

Surface-charge density and potential of coal-liquid mixtures and control of their stability and fluidity

The preparation conditions of concentrated (>70%) aqueous suspensions of coal were optimized, as were the surface charge density and the surface potential of the coal-water suspensions. The theoretical study showed that (1–3) or (2–3) electrolytes such as Na₂SO₄ or Na₅P₃O₁₀, greatly increase the surface charge density and the surface potential of the coal particles in water. This study has led to the interesting result that thinners and stabilizing agents of concentrated clay suspensions, such as lignosulphonates, tripolyphosphates, polynaphtalene sulphonates, etc., must also be good thinners and stabilizing agents for ground coal-water suspensions. Two parameters were controlled: the stability and the fluidity of the suspensions. A penetrometry technique revealed the importance of the resistance coefficient,C _r that can be used as a criterion for the evaluation of coal-water mixture stability and fluidity. Concentrated coal suspensions (about 75% of solid by weight) were prepared in water by using different additives, for instance sodium tripolyphosphate (NaTPP) and surfactants like lignosulphonates (by coupling of the dispersion and stabilizing effects) with the optimum concentration ratio of these two products equal to 1.9. The stability of the suspensions was then greater than 2 months and the viscosity was 1900 cP.     

SARS传染病数学建模及预测预防控制机理研究

首先，利用疾病传播的一般规律及人口守恒统计法则建立了四类人的SARS传染病数学模型，然后运用数学方法对四类人的SARS传染病数学模型进行分析，得出了其生理意义和预防、控制机理。其次，利用人工神经网络理论建立了SARS的预测模型，以北京市的SARS数据为例进行了预测和分析，预测结果显示该模型简单易行，预测精度高。