Research on rapid development platform of PLC control system

In the field of industrial process control,a fast-development platform for programmable logic controller(PLC)systems is designed in order to solve two main problems of rapid development of PLC control system and programmability of controlling software.In the aspect of design,the platform is composed of hardware controlling and software monitoring and is taking industrial computer as the core.Under the Windows environment,the platform establishes the control instruction set,develops the configuration function and visual programming function of the monitoring software and it integrates PLC controller based on Visual Basic software.In order to achieve the function of data monitoring,it has realized the serial communication between computer and PLC by using RS-485 and RS-232 serial ports line communication.The platform designs the intelligent instruction scheduling strategy by studying the encoding and decoding rules of the communication instruction set.It proposes a method for rapidly developing control programs by adopting the expert control mode,which enables clients to develop and modify programs conveniently by importing instructions in a non-coded manner.After experimental testing,the platform is proved successful achieving both the rapid development of PLC control system and the rapid modification of monitoring software.

Rapid Development of "Chauffeur-driven Car-on-demand Service" in China

The rise of 'Chauffeur-driven Car-on-demand Service' is a concrete manifestation of Internet+transportation.'CCS' is short for 'Chauffeurdriven Car-on-demand Service'.It shows the adjustment of resources,rematch of supply and demand through the Internet,which optimize the use of social idle resources.Traditionally,match of taxi supply and demand is random under the pattern of roadside recruit wave.

Rapid Development of Shenzhen's Clock and Watch Industry

Ten years ago there was no clock and watch industry in Shenzhen. But now there are 500 clock and watch enterprises with an annual output of 250 million watches, occupying one quarter of the world total, and 50 million clocks. The total production value is RMB4.7 billion, excluding the value processed with customers’ own materials. Thequartz watches of the Feiyada, Tianba, Haiba, Lanbaoshi, Shiyunda and Bawang brands produced in Shenzhen sell well in Beijing, Shanghai and Tianjin.

The Rapid Development of the Cause of Human Rights in China

As early as in 2002, the China Society for Human Rights Studies and the China Foundationfor Human Rights Development co-sponsored an international symposium titled ＂Oriental Culture and Human Rights Development,＂ marking an important milestone for the human rights organizations of China to confidently open themselves to the world and voluntarily perform mul- tilateral cooperation. In the past tenyears, the exchanges and cooperation in human rights between China and other countries in the world have been increasingly extended and deepened, and the world human rights cause has increasingly shown a positive trend of close contact, mutual dependence and collective development for all countries.

Rapid Prototype Development Approach for Genetic Programming

Genetic Programming (GP) is an important approach to deal with complex problem analysis and modeling, and has been applied in a wide range of areas. The development of GP involves various aspects, including design of genetic operators, evolutionary controls and implementations of heuristic strategy, evaluations and other mechanisms. When designing genetic operators, it is necessary to consider the possible limitations of encoding methods of individuals. And when selecting evolutionary control strategies, it is also necessary to balance search efficiency and diversity based on representation characteristics as well as the problem itself. More importantly, all of these matters, among others, have to be implemented through tedious coding work. Therefore, GP development is both complex and time-consuming. To overcome some of these difficulties that hinder the enhancement of GP development efficiency, we explore the feasibility of mutual assistance among GP variants, and then propose a rapid GP prototyping development method based on πGrammatical Evolution (πGE). It is demonstrated through regression analysis experiments that not only is this method beneficial for the GP developers to get rid of some tedious implementations, but also enables them to concentrate on the essence of the referred problem, such as individual representation, decoding means and evaluation. Additionally, it provides new insights into the roles of individual delineations in phenotypes and semantic research of individuals.

Rapid development methodology of agricultural robot navigation system working in GNSS-denied environment

Robotic autonomous operating systems in global n40avigation satellite system(GNSS)-denied agricultural environments(green houses,feeding farms,and under canopy)have recently become a research hotspot.3D light detection and ranging(LiDAR)locates the robot depending on environment and has become a popular perception sensor to navigate agricultural robots.A rapid development methodology of a 3D LiDAR-based navigation system for agricultural robots is proposed in this study,which includes:(i)individual plant clustering and its location estimation method(improved Euclidean clustering algorithm);(ii)robot path planning and tracking control method(Lyapunov direct method);(iii)construction of a robot-LiDAR-plant unified virtual simulation environment(combination use of Gazebo and SolidWorks);and(vi)evaluating the accuracy of the navigation system(triple evaluation:virtual simulation test,physical simulation test,and field test).Applying the proposed methodology,a navigation system for a grape field operation robot has been developed.The virtual simulation test,physical simulation test with GNSS as ground truth,and field test with path tracer showed that the robot could travel along the planned path quickly and smoothly.The maximum and mean absolute errors of path tracking are 2.72 cm,1.02 cm;3.12 cm,1.31 cm,respectively,which meet the accuracy requirements of field operations,establishing the effectiveness of the proposed methodology.The proposed methodology has good scalability and can be implemented in a wide variety of field robot,which is promising to shorten the development cycle of agricultural robot navigation system working in GNSS-denied environment.

Vigorously Achieve a Long-Term Stable and Rapid Development

Since the beginning of 2012,the international political and economic environment becomes more complex and volatile,so China’s economic development faces increasing difficulties.China’s economic growth has slowed down,with GDP growth rate of 8.1%,7.6%,and 7.4%for the first,second and third quarter respectively.What China’s current economic situation is and how the future development trend will be

STUDY ON MICROWAVE DIELECTRIC PROPERTIES OF EPOXY RESIN MIXTURES USED FOR RAPID PRODUCT DEVELOPMENT

This paper presents a preliminary study on the dielectric properties and curing of three different types of epoxy resins mixed at various stoichiometric mixture of hardener, flydust and aluminium powder under microwave energy. In this work, the curing process of thin layers of epoxy resins using microwave radiation was investigated as an alternative technique that can' be implemented to develop a new rapid product development technique. In this study it was observed that the curing time and temperature were a function of the percentage of hardener and fillers presence in the epoxy resins. Initially dielectric properties of epoxy resins with hardener were measured which was directly correlated to the curing process in order to understand the properties of cured specimen. Tensile tests were conducted on the three different types of epoxy resins with hardener and fillers. Modifying dielectric properties of the mixtures a significant decrease in curing time was observed. In order to study the microstructural changes of cured specimen the morphology of the fracture surface was carried out by using scanning electron microscopy.

Development of Rapidly Quenched Soft Magnetic Materials in China

The discovery of the first Fe-based ferromagnetic amorphous alloy in 1966 had made an impact on conventional magnetic materials because of its unique properties. Since then, a number of amorphous magnetic materials have been successfully developed and used in a wide variety of applications. A brief review of R & D activities on amorphous soft magnetic materials in China is given from the beginning to the present in a somewhat chronological order, followed by a brief introduction to their applications on electric and electronic industries. An analysis and a prospect of Chinese market of such amorphous materials are also presented.

China's Space Computer Industry Rapidly Developing

In 1993, China Aerospace Corporation(CASC) announced that it would give priority to the development of satellites and their applications, automobiles and components, computers and their applications, and regard them as its three-pillar industries, which was "a historic and significant strategic decision" said Mr. Liu Jiyuan, the president of CASC. New and

汉语发展性阅读障碍儿童的快速命名与正字法加工技能

目的:探查汉语发展性阅读障碍儿童快速命名和正字法加工的特点。方法:运用小学生识字量评价量表和标准瑞文智力测试,从171名小学二至四年级学生中选出20名发展性阅读障碍(DD)儿童、22名同年龄对照组(CA)儿童、18名同阅读水平对照组(RL)儿童。三组儿童进行数字、图片快速命名,和正字法加工技能测试,即真字、假字、非字判断任务,记录反应时和错误率。结果:DD组在数字、图片快速命名上的反应时均长于CA组(均P<0.01),图片命名的反应时与RL组差异无统计学意义(P>0.05),而数字命名反应时短于RL组(P<0.05)。DD组和RL组均表现出拒绝假字的时间长于拒绝非字(均P<0.05),而CA组儿童此效应无统计学意义(P>0.05)。结论:本研究提示汉语阅读障碍儿童存在数字快速命名缺陷,其图片快速命名速度落后,与其阅读水平表现一致。本样本中的发展性阅读障碍儿童表现出明显的正字法效应,即能很好地判断假字和非字。

3D打印技术在儿童髋关节脱位翻修术中的临床应用

目的:探讨3D打印技术在儿童发育性髋关节脱位术后翻修中的临床应用。方法:对8例发育性髋脱位术后再脱位患儿行CT扫描获取病变部位的二维数据,进行三维重建,快速成型制作出与实体1:1大小的骨盆模型,对骨盆模型术前制定手术方案,手术规划和模拟手术,指导手术治疗。结果:术中所见与虚拟三维重建图像及3D打印骨盆模型一致,术前的模拟手术减少了手术操作时间,达到更佳手术效果。结论:3D打印技术能够准确和直观地反映儿童髋关节脱位翻修术前骨盆畸形的立体形态和各部位解剖结构的空间关系,使手术更精确、更可靠、更方便。

快速成形导航模板在髋臼发育不良全髋关节置换中的应用

目的:应用计算机辅助及逆向工程技术设计个性化导航模板,指导髋臼发育不良关节置换髋臼假体精确安放。方法:16例髋成人发育性髋关节发育不良病人应用全髋关节置换,男9例,女7例,年龄34～52岁,Crowe分期Ⅰ期10髋;Ⅱ期2髋;Ⅲ期2髋;Ⅳ期2髋。Harris髋关节功能评分在62～24分,平均42.6分。通过术前CT扫描的三维数据,设计髋臼旋转中心,建立发育不良髋臼的计算机数据模型,通过逆向工程技术制做与病人髋臼解剖完全吻合的导航模板,并应用于全髋关节置换手术。同时行术前、术后影像学及临床评估及术后随访。结果:16例病人术后的髋臼位置良好,外翻角在42°～55°,前倾角为12°～22°,下肢延长2～6CM,术后Harris髋关节功能评分在80.3分,无股神经和坐骨神经损伤等并发症。结论:计算机辅助快速成形导航模板应用于髋臼发育不良的全髋关节置换,能精确的控制髋臼假体的安放,对髋臼假体的前倾角和外翻角能精确的控制,并取得较好的疗效。