一种新型的消防控制系统

本系统是一个较完整的由单片机控制的消防系统，其功能是在查到消防报警信号后，通过串行通讯口给各控制点发出控制信号如起动加压水泵，打开喷水龙头的电磁阀或灭火器的气体阀等等。讯号由键盘发出。各被控点如已正确动作，在控制板上会有所显示。误动作或未动作也可显示在控制板上。控制的时间和路数可由打印机记录下来、相应的软件有数据处理、显示、通讯、结果打印等。     

基于51单片机的新型电脑快捷键设计

运用51单片机和无线控制模块,实现对电脑的无线快捷操控。     

一种新型分体式单片机实验装置

通过对当前高职院校单片机课程尤其是实验教学中存在的问题进行剖析,提出用一种新型的实验装置来替代传统的单片机实验箱的看法,简述了分体式实验装置的开发理念和开发过程,以及传统实验箱所不具备的优点,研制出一种基于工作过程的新型单片机实验装置。     

热驱动薄膜式微型泵的效率研究

微型泵在生物化学分析、药物输送和芯片冷却等领域有广阔的应用前景。为了确定热驱动薄膜式微泵达到最大工作效率的工作条件,对泵的温度响应和振动响应进行数值模拟,分别得到五种加热功率下微泵的流率－频率曲线,效率－频率曲线以及微泵的最佳效率曲线。发现微泵的流率在4－5Hz达到最大,当加热功率大于2W时,微泵的流量不再显著增加;微泵在加热功率为1W时的效率最大,最佳工作条件是加热功率1W、加热频率5Hz,此时微泵的效率为32．54μl/min.W。     

微型螺旋转子的光驱动计算

利用光学力来驱动微型器件是一种新型 MEMS 驱动方式。在几何光学模型近似下,对用TEM00 高斯激光束驱动微型螺旋桨结构的光驱动力和力矩进行了理论计算。光驱动力矩与激光功率成正比,和微器件的结构尺寸以及微器件与工作介质的相对折射率等因素有关,设计微器件时必须同时考虑这三个因素。计算得出激光功率 10mW 时,作用在螺旋转子上的光学驱动力矩为7.4×10-17 N?m,和文献中实验结果基本一致。该方法可以应用在复杂三维微结构的光驱动计算中,对微型转子进行优化设计。     

一种微型转子的激光加工和光致旋转

利用单束强聚焦激光产生的光学力可以驱动微型器件,具有无机械接触和无需导线等优点,为微型机电系统提供了一种新型的驱动方式。在自行研制的飞秒激光微细加工系统中,采用一种新型的丙烯酸酯紫外光固化树脂,通过双光子聚合加工出直径6μm的万字形微转子。利用光镊装置实现了微转子的俘获,并在激光功率50mW时实现了转速为200rpm的光致旋转。微型转子的光致旋转为实现微机械马达提供了一种有效手段。     

基于单片机的LED显示屏设计

进入21世纪以来,各种现代化技术不断发展,很多新装置、新设备在社会中的应用范围也不断扩大,LED显示屏作为一种新兴的显示设备,因其具有寿命长、亮度高、视角宽广、观看距离远,有很好的耐冲击能力,性能稳定等优点,所以在社会中得到广泛应用,发展十分迅速。本次主要提出一种以单片机为基础的LED显示屏设计,其显示清晰、稳定、亮度比较均匀、组装手段灵活、便于安装、尺寸的大小也可以进行调整,所以其市场前景比较广阔。     

一种新型大功率晶体管驱动电路的研究

本文介绍一种新型的大功率晶体管的驱动电路．这种电路能够满足晶体管高速开关的要求，且具有良好的保护性能．电路结构紧凑、成本低，可广泛应用于由大功率晶体管（GTR）作为开关元件的电力电子装置中．     

多功能激光精密测微仪的单片机接口设计

本文简要介绍了多功能激光精密测微仪的工作原理，并重点介绍了８０９８单片机接口硬件，软件两方面的设计原理。     

一种微型零件图像边缘提取的方法

准确地提取微型零件的边缘。为图像的精密尺寸检测奠定基础。采用光学测量显微镜-CCD-图像采集-微机数字图像处理。与传统的sobel算子比较，本文提出的系统结合提供的相关算法对于提取微型零件图像边缘信息更加有效。满足了用户的测量要求。     

Experimental research on the effectiveness of speed reduction markings based on driving simulation: A case study

The objective of this paper is to test the effectiveness of speed reduction markings (SRMs). The empirical data including vehicle operations and drivers’ psychological and physical reactions were collected in a driving simulator. An index—the relative speed difference—was developed to evaluate the effectiveness of speed reduction markings. Researchers analyzed data to test the effectiveness of speed reduction markings and quantitatively study their effects and the deceleration process. Out of 15 subjects, there were 1 (7%), 2 (13%), and 7 (47%) subjects who decelerated while driving through the downhill section in the No SRMs scenario, Longitudinal SRMs scenario and Transverse SRMs scenario, respectively. In terms of speed and subjects’ decelerating maneuver, the results of the analysis of variance (ANOVA) and the contrast analysis (S–N–K method) showed that transverse speed reduction markings (TSRMs) could significantly influence subjects’ speed choice and maneuver (P < 0.05).     

Experimental research on safety impacts of the inside shoulder based on driving simulation

Statistical data shows that single-vehicle crashes account for half of all traffic crashes on expressways in China, and previous research has indicated that main contributing factors were related to whether and how the inside shoulder was paved. The inside shoulder provides space for drivers to make evasive maneuvers and accommodate driver errors. However, lower-cost construction solutions in China have resulted in the design of numerous urban expressway segments that lack inside shoulders.     

新能源汽车散热风扇驱动系统仿真研究

以油电混合动力汽车蓄电池管理系统所需的电池散热风扇为背景,对其永磁同步电动机驱动系统进行仿真研究,在Matlab/Simulink搭建整个系统仿真模型、转速和电流控制模块。结果表明:所得波形符合理论分析,系统响应快,超调量小,运行稳定,具有良好的动、静态特性,对车载散热风扇的实际控制提供了新的研究思路。     

Server intervention: A new approach for preventing drinking driving

Most current strategies for preventing casualties associated with drinking driving stress criminal sanctions, alcoholism treatment, and/or educational programs. Because these approaches have been shown to have at best only a limited impact on the incidence of drinking driving, new prevention strategies need to be developed to complement existing efforts. This article provides the basic conceptual framework for designing one such strategy-server intervention programs.

Server intervention refers to those actions taken by servers of alcoholic beverages which are designed to reduce the likelihood that those being served will harm themselves or others. The programs can be divided conceptually into three basic components: (1) training (educational programs directed at servers); (2) legal (ABC laws and regulations, dram shop liability, and criminal laws): and (3) environmental (design of outlets, outlet location, and transportation facilities). The article analyzes these three components and reviews six existing or recently completed programs throughout the United States. The article concludes by summarizing the practical barriers, potential benefits, and theoretical implications of a server intervention approach to the prevention of drinking driving.     

Strategy research on new urban space development and new deepwater terminal in Hengsha

From a strategic perspective,the paper presents a forward-looking thinking supported by interdisciplinary of modern logistics,estuary and coast,environment and ecology,economic management and mathematical statistics. It leads to a reasonable solution to space expansion by reclamation. Construction of new deepwater terminal is the best usage of land resources and can strengthen the status of Shanghai as an international shipping center,thus support the preparation and strategic decision of future urban development of Shanghai.     

A mixed-mode damage model for delamination growth applied to a new woven composite

In this paper, delamination initiation and propagation of reinforced fibrous composite laminate, in single and mixed mode, are numerically predicted by taking into account the existence of imperfect interfaces between the plies. The bonding conditions between layers are characterised by jumps in displacements which are proportional to the traction stresses. In order to describe the interface damage an approach based on the indirect use of fracture mechanics considering a softening stress-relative displacements law is presented. The accuracy of the predictions is evaluated in single-mode delamination tests, in the mixed-mode bending test, and in a structural configuration consisting of the debonding of a new woven laminated composite reinforced by particles of date cores for orthopedic use. The interface is regarded as being a whole of several interfacial bonds. Each bond is supposed to be made up of three stiffnesses acting in the three directions.     

关于上海城市发展新空间和深水新港 战略研究的思考

从战略的高度,以现代物流、河口海岸、环境生态、经济管理和数理统计等多学科的视角,进行前瞻性的思考,提出一种解决土地资源紧缺和合理使用土地资源的方案——以围海造地拓展上海城市发展新空间;以建设深水新港优化土地使用并稳固上海的国际航运中心地位,试图为上海新一轮发展的前期准备和决策提供支撑。     

水凝胶的最新研究进展

水凝胶是一种具有三维网络结构的新型功能高分子材料,以其含水量高、溶胀快、柔软、具有橡胶般的粘稠性和极好的生物相容性等特点,目前已经得到广泛应用及研究。综述了水凝胶的分类、应用及目前研究的热点,并预测了未来的发展趋势。     

A preliminary investigation of new mechanical product development based on reliability theory

This paper presents a preliminary study on the feasibility of developing a new mechanical product based on an existing well-known product. It is carried out following a modified dynamic reliability theory. In this approach it proposes a relationship between hazard rate function and reliability of the system. The importance of several parameters, such as the relative capacities of design, manufacture and prototype problem-solving, are discussed based on the complexity and maturity of the mechanical product we are investigated in. These parameters are estimated through fuzzy-set operations about intrinsic and extrinsic scaling of the technology adopted in the new product development.     

Drive cycle development for tricycles

The absence of protocols through which an alternative technology for two stroke tricycles could be evaluated makes it difficult to compare these technologies and determine the best alternative. This study demonstrates the process of the development of a dynamometer test cycle that would be reflective of the actual driving conditions in Metro Manila. The development of such test cycle would be vital to the development of emission factors. The study covers the gathering of actual speed-time data, development of the instrumentation device for the said activity, analysis of the data gathered and extraction of a test cycle. Results were compared to the Indian drive cycle to demonstrate the inappropriateness of adapting drive cycles derived from other areas.