国内外舰艇管路系统抗冲击技术工作述评

从舰艇管路系统冲击研究的方法、模型和模拟计算、舰艇管路系统(抗)冲击试验、舰艇管路系统冲击环境预报和仿真、舰艇管路系统抗冲击设计评估、舰艇管路系统冲击标准及规范以及舰艇管路系统抗冲击元器件研制等六个方面对国内外开展的舰艇管路系统抗冲击工作进行了述评,并引出了我国在这些方面存在的问题。     

中央空调系统消声与减振的研究

中央空调系统噪声控制主要包括消声和隔振两个方面。分析了中央空调系统的噪声源主要来自气动、机械、电磁三个方面,并以此提出了中央空调机组噪声控制方法,根据振源提出合理的隔振减噪措施,并以某办公楼集中式空调系统为例进行了消声和减振设计,中央空调系统达到了所允许的噪声标准。     

物联网技术在制冷空调行业中的应用

针对物联网技术在制冷空调行业中三个方面的应用进行分析,介绍了物联网技术在食品冷藏储运及实时监控中、制冷空调系统远程控制中、中央空调系统计费系统等方面的应用情况。     

某劳教所智能监控系统的设计与实现

针对当前社会形势,明确了智能监控系统在确保社会平安稳定和谐等方面重要作用,并结合现今较为先进的监控技术和劳教场所的工作实际,设计了应用于某劳教所的智能监控系统,分析了该系统的功能、构成和原理,对所用的探测器、控制器、传输方式、软件设计等方面进行了详细说明。     

钱学森与系统科学

简要考察了钱学森在系统科学体系、系统工程、控制论、运筹学和系统学方面的主要贡献,论证了他作为中国系统科学导师的地位。     

大型循环水系统节水方案的对比分析

在水资源日益匮乏而能源化工项目迅速增长的今天,水成为制约能源化工行业发展的必经之路。本文从初期投资、新鲜水消耗等方面,对比了传统开式循环水系统、消雾节水型循环水系统、密闭式(喷淋)循环水系统在使用及设计中的优缺点;探讨了循环水系统的节水、占地面积以及初期投资方面的差异等。分析结果表明:消雾节水型循环水系统在节水、社会效益以及投资方面有着可观的效果。     

AIMS系统架构及常见故障分析

对AIMS系统的系统模型、软件模块等方面进行分析阐述,分析了AIMS系统软件故障。     

三六三医院暖通空调设计

介绍了三六三医院的空调设计，从冷热源、空调水系统、风系统、冷冻水系统、自动控制系统几方面着重介绍了采取的节能措施。     

青岛某包装有限公司洁净空调设计

本文针对青岛某包装厂具体情况,就洁净空调系统的设计、送排风的形式以及系统节能方面做了介绍,并对厂区锅炉房通风、排风口的处理及冷却水的计算等方面做了具体说明.     

火电厂锅炉干除渣系统改造前后的效果分析

基于对新疆华电红雁池发电厂#1、#2锅炉干除渣系统改造,在系统构成、可靠性、经济性等方面进行了分析,改造后的干除渣系统不仅系统简化、稳定性提高,还节约了厂用电量。     

空气-水风机盘管系统关键问题分析

就空气-水风机盘管系统的基本特点、适用场合做了简单的介绍。并重点对这类系统的设备选型及校核做了阐述。同时对水系统设计中的关键问题,从理论和实践两个方面做了比较详细的论述分析,并提出了自己的推荐方案。     

《电机不平衡磁拉力研究现状与展望》

对当前国内外电机不平衡磁拉力研究现状进行分析和综述,分析和总结不平衡磁拉力的机理、特征,并对不平衡磁拉力特别是非线性磁拉力的国内外发展概况进行介绍。归纳防止和减小不平衡磁拉力的有效措施,最后对电机不平衡磁拉力未来的研究方向进行展望。     

Ant colony optimization system for a multi-quantitative and qualitative objective job-shop parallel-machine-scheduling problem

This paper addresses a multi-stage job-shop parallel-machine-scheduling problem with an ant colony optimization system developed. The problem is practically important and yet more complex, especially when customer order splitting in multiple lots for the reduction of operation times in each workstation is allowed. It also includes the decisions of the numbers of parallel machines in workstations dynamically scheduled. In addition, this paper also addresses the multiple-objectives scheduling. For the practical concern, in addition to the production (or quantitative) objectives, the marketing (strategic or qualitative) criteria are also considered. A soft constraint thus may be realized from a thus-called qualitatively evaluated order sequence. The soft constraint with the ant colony optimization solution constructs a penalty function for the multiple qualitative objectives and the results of scheduling obtained by ant colony optimization. For this problem, the ant colony optimization components (including the network representation, tabu lists, transition probabilities, and pheromone trail updating) are also developed and adapted for the multiple objectives. The experiment results of parameter design and different problem sizes are provided. The results of a genetic algorithm also developed for the present problem under the developed system concept are also provided, since in the literature the genetic algorithm has also not been explored for the present problem with multiple objectives and order splitting. The results of both solution techniques show the potential usefulness of the system and are comparable, but the ant colony optimization provides a more computationally efficient better result.     

Studies on energetic compounds. Part 16. Chemistry and decomposition mechanisms of 5-nitro-2,4-dihydro-3H-1,2,4-triazole-3-one (NTO)

The present review deals with the chemistry and thermolysis of NTO and plausible decomposition pathways have been described. The decomposition of 5-nitro-2,4-dihydro-3H-1,2,4-triazole-3-one (NTO) induced by X-ray, UV, laser, photochemical irradiation has also been discussed. High-speed photographic studies of the impact responses of NTO are also included. The thermal decomposition of labelled NTO has also been described here. Methods of detection as well as safe disposal of NTO have also been mentioned.     

Theory of Thermal Conduction in Thin Ceramic Films

The theory of heat conduction in ceramics by phonons, and at high temperatures also by infrared radiation, is reviewed. The phonon mean free path is limited by three-phonon interactions and by scattering of various imperfections. Point defects scatter high-frequency phonons; extended imperfections, such as inclusions, pores, and grain boundaries, affect mainly low-frequency phonons. Thermal radiation is also scattered by imperfections, but of a larger size, such as splat boundaries and large pores. Porosity also reduces the effective index of refraction. For films there are also external boundaries, cracks, and splat boundaries, depending on the method of deposition. Examples discussed are cubic zirconia, titanium oxide, and uranium oxide. Graphite and graphene sheets, with two-dimensional phonon gas, are discussed briefly.     

分组OTDM局域网中接收受限问题的扩展

在分组间插的OTDM局域网中，光分组的发送和接收不仅受限于电子处理速度的限制，而且受限于光分组压缩解压缩器的结构。本文提出了使用分组重排和光时分解复用器构建并行解压缩器来缓解该受限问题的方案。同时，通过对传统的周期预留多址接入CRMA(Cycle Reservation Multiple Access)协议进行进一步扩展，得到了在受限条件下既能避免将数据分组简单丢弃、又能获取很高网络性能可行的高速网络接入控制协议。     

影像清晰度的指标--分辨率

本文全面而简明扼要地阐述了分辨率的含义及其对图像清晰度的重要性，并系统地介绍了市场上常见的一些成像系统设备分辨率方面的最新技术数据，如：各种照相镜头，照相胶片，数码相机，摄像机，图像扫描仪，打印机，以及常规和数码扩印系统等。对影像清晰度和彩色饱和度的关系，也进行了讨论。     

Singular solitons in optical metamaterials by ansatz method and simplest equation approach

This paper derives singular 1-soliton solution for optical metamaterials. There are two integration approaches that obtains the solution. These are the ansatz approach and the simplest equation approach. The second method also leads to an additional set of solutions that emerge as a by-product. These are topological soliton, rational solution and singular periodic solution. The constraint conditions for the existence of these solutions are also exhibited. The numerical simulation of a topological 1-soliton solution is also exhibited.     

基于模糊自适应PID的加样臂位置控制

为实现快速、平稳的加样臂位置控制,将模糊控制与传统PID控制相结合,设计出基于模糊自适应PID的位置控制器.通过模糊控制在线调整位置环PID控制器的3个参数,使控制器具有较强的自适应能力和抗负载扰动能力,同时还具有传统PID控制器精度高的优点.仿真结果表明,基于模糊自适应PID的位置控制器比传统PID位置控制器响应速度快,调节时间短并具有抗干扰能力.进行了加样臂的运动控制实验,以传统PID控制作为对比,通过改变加样臂的运动环境验证了模糊自适应PID控制可以实现加样臂的准确位置控制并具有一定的自适应能力,可以为类似控制器的设计提供参考.     

Effect of dynamic crosslinking on crystallization and thermal degradation of polypropylene in polypropylene (PP)/ethylene-propylene DIENE (EPDM) rubber blends

Blends of isotactic polypropylene and ethylene propylene diene (EPDM) rubber were dynamically vulcanized using the dimethylol phenolic resin/stannous chloride crosslinking system. The EPDM blends are thermally more stable than polypropylene (PP). Dynamic curing rendered the vulcanizate thermally more stable than unvulcanized blends. The variations in degree of crosslinking and degree of crystallinity are the main factors for observed increase in thermal stability of vulcanized blends. Degree of crosslinking increases the interfacial adhesion between the PP and EPDM phases. Dimethylol phenolic resin used as a compatibilizer also enhanced the thermal stability of the PP/EPDM blends. Crystallization of PP in the blends of PP/EPDM was also studied through modulated differential scanning calorimetry. Other detailed analyses of endotherm peaks obtained after first and second melts in terms of heat of enthalpy, degree of undercooling, and degree of crystallinity were also evaluated. Kinetic parameters were also determined.