新型温度控制器设计

为改善水热毯温度控制器的功能,降低其工作时的噪音,设计了一种以AT89C52单片机为核心,并具有遥控功能的新型温度控制器.用双向可控硅来控制水热毯加热器的工作,实现了温度在一定范围内连续可调,并实现了定时启动、定时工作和固定睡眠功能,实现了温度的智能化控制,其温度和定时时间均可在液晶屏上显示.用C语言编写了相应的控制软件,并采用模块化结构设计.实践证明,该控制器操作简单方便,功能齐全,噪音小,成本低.     

GPS车辆卫星定位模拟系统

本文对GPS车辆卫星定位系统的硬件架构与软件的设计进行了探讨，系统采用GSM作为数据传输的媒介，用PC机当作是控制中心，用小车代替车辆。系统由GPS发出位置信息，再由GSM把信息传送给PC机，经过PC机处理，显示小车在地图上的位置，再由PC机在发出指令，通过GSM把指令传送给小车，小车执行指令。     

IC卡式家用电度表设计

以单片机为核心,设计出IC卡式家用电度表,实现了预收费、报警、显示、断电和防作弊等功能。论文从硬件电路和软件设计两方面进行论述,并提出电度表的网络化管理思路。     

CTOD‐R curves of the metal‐clad interface of API X52 pipes cladded with an Inconel 625 alloy by welding overlay

Crack‐tip opening displacement resistance curves (CTOD‐R) of the substrate/cladding interface of an API 5 L X52 steel pipe internally coated with Inconel 625 applied by TIG (GTAW) welding were experimentally evaluated. A small pipe section with 168 mm of outer diameter and 22.5 mm of thickness was internally coated with a 15 mm thick layer of Inconel 625 corrosion resistant alloy. Tension test specimens were obtained from both substrate and cladding, as well as compact tension test specimens (C(T)) for the evaluation of CTOD‐R curves. The fracture testing specimens were notched at the interface in RL orientation. In addition to fracture and tensile testing, microstructural characterization was conducted at the interface using optical microscopy (OM) and scanning electron microscopy (SEM). Qualitative chemical composition scanning and microhardness determination were also performed. The results indicated high fracture toughness for the substrate/cladding interface and the absence of low toughness regions at the interface of the tested samples.     

低压供电系统漏电监测装置的研究与设计

针对低压供电系统传统继电器保护存在的控制速度慢、可靠性差等缺点,设计了一种以AT89C52为核心的低压供电系统漏电监测装置.当系统漏电电流大于预设值时,执行机构会自动脱扣,断开主回路,同时系统会自动发出警报,并显示当前漏电电流值,技术人员可以实时了解漏电状况并作出合理判断.经过试验验证了设计方案的可行性.     

单片机控制的超声波测距仪汽车倒车系统的设计

本文设计一种基于单片机STC89C52的超声波测距仪汽车倒车系统,介绍了超声波测距的基本原理,阐述了倒车雷达系统的结构组成、硬件电路设计,并在数据处理部分采用温度补偿消除温度对声速的影响,提高了测距精度.倒车距离采用LCD进行实时显示,并通过语音报警电路对不同距离段做出不同的语音提示.实验表明该倒车雷达系统在30～ 5...     

Verfahrensfremde Sachverst?ndigengutachten

Es ist nicht unzul?ssig, Sachverst?ndigengutachten aus einem anderen Verwaltungsverfahren (hier: gewerbliches Betriebsanlagenverfahren) zu verwenden. Werden solche Sachverst?ndigengutachten der baubeh?rdlichen Entscheidung zugrunde gelegt, bedarf es aber einer nachvollziehbaren und umfassenden Darlegung in der Bescheidbegr52;ndung, weshalb diese Sachverst?ndigengutachten auch im konkreten Fall Verwendung finden k?nnen.     

Characterising urban concentration and land-use diversity in simulations of future land use

This paper presents two sets of functional indicators that were implemented and tested for the assessment of spatial aspects of future land-use configurations as simulated by a land-use model. This is potentially useful for the ex-ante evaluation of spatial planning policies. The indicators were applied in a Dutch case study and relate to two important themes in Dutch spatial planning: compact urbanisation and mixing of land uses. After a short introduction of these themes, the sets of indicators are presented which are used for their evaluation. These indicators are applied to simulations based on two scenarios for land-use development in the Netherlands up to 2030. After a discussion of the results we conclude that the combined application of land-use models and indicators produces new and potentially useful information for policy makers, although both the model and the associated indicators are still in a state of development.     

石墨烯改性环氧树脂涂层的制备及其性能

为增强传统环氧树脂涂料的耐腐蚀性能,将改性石墨烯与涂料复合,制备了不同石墨烯含量的复合涂层。利用扫描电子显微镜(SEM)、接触角测定仪、显微红外光谱仪、热重分析仪、多功能表面测试仪等表征了添加不同含量石墨烯涂层前后的截面形貌、接触角、耐热性能以及摩擦磨损性能;采用电化学阻抗谱(EIS)、极化曲线研究涂层浸泡在3.5%Na Cl溶液中的电化学行为,并通过中性盐雾试验测试不同石墨烯含量涂层的耐盐雾腐蚀性能。结果表明:当石墨烯添加量为1%时,涂层各方面性能相对最佳。与未添加改性石墨烯涂层相比,改性石墨烯涂层的接触角增加5°,疏水性能增加;平均摩擦因数从0.28降至0.08,耐磨损性能提高;自腐蚀电流减小,自腐蚀电位正移耐腐蚀性能显著增强;1 800 h盐雾试验中1%石墨烯涂料样板未发生明显腐蚀。     

智能型高压断路器电子计数器

针对目前变电站断路器的使用情况进行分析,提出并设计出一种能有效评估断路器寿命及判断分、合闸情况的智能计数器,为智能变电站的建设提供基础数据依据。