Beamforming Technique of the Multi-aircrafts Management System

Under the operation mode of the multi-aircrafts , more aircrafts at the same time in the view area of one TT&C station. Obviously, it is unable to manage them for traditional methods. This paper proposes a new technique, which combines SDMA with spread spectrum CDMA. In SDMA, multi-beamforming is available by parallel data processing and one aircraft is tracked by one beam. Finally, simulation results of digital beamforming are provided.     

Study and Implementation of Digital Flame Image Inspect System for Power Plant Boiler

Aiming at the shortcoming of modern power plant flame image inspect system that is based on on_off logicals,the article design a new power plant flame image inspect system based on general video capture hardware. A best optimize image segmentation arithmetic is given for image pretreatment. Based on human cognize character, the paper puts forword a Weightiness Amend Coefficient(WAC). for the purpose of enhancing the intelligent and auto_adoptions to complex combustion condition, a new Cluster Center Initiative Optimize and Auto_adoptions Rework arithmetic is put forword. At last, the experimentation result is given.     

Application of SDL in the Digital System Design

As a standardized formal language, the SDL has widely been used in the software development. In order to extend its application field, it has been explored to use in hardware design.This paper gives a logical gate circuit-and gate as an example to explain the method of applying SDL to describe and simulate/validate the hardware characters by the SDT tool. The various logic circuits or digital circuits may be made to the SDL packages because the SDL supports the object oriented technology. These packages can be directly invoked in the design of the complex digital system, so it is possible to describe and simulate/validate the complex digital system.The experiment has proved that the application of SDL for hardware design is feasible and rather convenient.     

基于SOA的数字林业业务定制技术研究

在数字林业多系统集成研究过程中,为了快速搭建满足各类需求的应用系统,实现软件复用,提出了一种基于SOA的数字林业业务定制技术,构建了业务定制平台,并对平台的整体架构和功能结构进行了详细描述,最后给出了基于业务定制平台定制业务的具体步骤。运用业务定制技术,有助于提高系统的可扩展性、灵活性、可靠性,并能最大限度地实现软件复用,为数字林业建设提供技术支撑。     

Embedded Intellingent Dynamic Balance Testing System and Its Digital Filter Designing

A lot of information needs processing in time in dynamic balance testing, but the current intelligent dynamic balance instruments and the controlling box of dynamic balance machines made up ofsinglemicrocontroller do not meet the request.A method isgioen that the DSP-Microcontroller will be useddiredtlyinthe system of the intelligent dynamic balance instrumentby using embedded design technique. A principal and subordinate control system compose of DSP and microcontroller. The Microcontroller the system as a principal controller and the DSP implements digital filtering and FFT in dynamic balanc by means of its fast operation. The system develoyed according tothe method can do more analysisin time areaand frequency area.     

Study of the Digital Measurement Tachnique and Apparatus for Impulse High-Voltage

A digital measurement apparatus is developed for Impulse high voltage. Ine ap paratus composes of a high speed A/D converter(20 MHz),a single-chip computer interface and some other high speed analog intergrated circuits with excellent function,It is characteristic of flxing transient waveforms,storing,processing and analysing waveform data measuring maxi-mum value of impulse high voltage.     

Construction and Realization Method for 3 -D Digital City

This paper studies the key technology in the 3 - D digital city construction, and puts forward a new method to construct and realize the 3 - D digital city. The authors discuss the dates gathering and disposal from the collection of 3 - D topograph dates, the construction and ingress of 3 - D model, the gathering and disposal of texture dates. Subsequently, to solve the problem of that the 3 - D topograph dates are greater than the 2 - D topograph, the bulk-dates optimization of 3 - D digital city is realized through the choose of appropriate DEM of linenumbers and column numbers, the 3 - D model modeling specification, the using of nodes replace, the optimization of LOD modeling. The successful operation result of Chongqing Hi-tech Development Zone 3 - D digital city project illustrates that, this system can realistic mimic status in quo of the Chongqing Hi-tech Development Zone, the system operates smoothly, and its effect is also well.     

城乡融合发展视角下数字乡村评价指标体系构建

为了促进数字时代新型城乡关系的构建,实现数字乡村与智慧城市融合发展。基于对智慧城市发展水平评价相关研究的梳理,本研究采用知识图谱法和模糊集法筛选出智慧城市评价共性指标,并在结合乡村地域特点选取特色指标的基础上,将智慧城市部分评价指标延伸至数字乡村,构建城乡融合发展视角下的数字乡村发展水平评价指标体系。本着科学、全面、可靠与可得的原则,本研究最终构建了包含发展支撑、数字基础设施、数字治理、数字民生、产业数字化等5个维度的数字乡村评价指标体系。与其他数字乡村评价指标体系相比,更加全面、科学,既体现了以智慧城市发展带动数字乡村发展的本质内涵,也较为客观地从县村之间的互动关系上体现了城乡在数字建设融合发展上的融合程度。     

Analysis and Study to Static and Dynamic Characterisstics for a Digital Speed Control Valve Made in Japan

n this paper,researches of digital valves in Japan in recent years are briefly de-scribed. The operation principles and the structure of a new digital speed control valve are analysed.This new valve is made by Japanese Tokyokeiki company. Based on these investigations , theoretiealanalysis,degital simulation and experimental study are emphasized to the valve's static and dynamiccharacteristics.     

A Foundational Platform for Digital Urban and Rural Planning Based on GIS

On the basis of investigations related to the existing problems about digitalization and information in the urban and rural planning, the authors analyzed the requirements of an operational platform for digital urban and rural planning. Then, an overall design and relevant modules of the foundational platform for digital urban and rural planning are proposed according to the principles of software engineering. The object-oriented programming language, Visual C++6.0, and the relational database, Visual FoxPro6.0, were selected as the common tools for developing the platform.     

气候变化背景下的现代农业科技传播体系构建

在气候变化背景下我国现代农业发展面临着科技传播体系的缺失,具体表现为“传者本位”思想突出,农业适应气候变化的先进理念和先进技术无法传播到农村弱势群体;传播渠道过于狭窄,农业适应气候变化的先进理念和先进技术无法准确及时得到传播;农民科学素养不高,农业适应气候变化的先进理念和先进技术无法得到农民的追随与认同、扩散;传播内容受到限制,农业适应气候变化的先进理念和先进技术无法得到主动持续更新;“科教推用”难以结合,导致农业适应气候变化的先进理念和先进技术传播的效果不佳。因此,应构建“五个W分层分级环形互动科学传播体系模式”,即构建气候变化背景下的“现代农业科技传播者系统”;构建气候变化背景下的“现代农业科技讯息系统”;构建气候变化背景下的“现代农业科技媒介系统”;构建气候变化背景下的“现代农业科技受传者系统”;构建气候变化背景下的“现代农业科技效果系统”。这一体系模式既是适应气候变化的,也是适应现代农业发展趋势的。     

PD Online Measurement of Transformers with Wide Frequency Band System and the Noise Eliminating Method by Cascaded IIR Lattice Notch Digital Filter

The frequency band of conventional partial discharge (PD) measurement systems is selected just within several ten kilohertz. With the development of computer and digital signal processing techniques, wide frequency band (WFB) measurement systems have been used to detect PD in electrical equipment for its higher sensitivity. Nevertheless, the WFB measurement systems are easy suffered from the interference of strong field electromagnetism noises. A set of PD online monitoring system with frequency band from 50 kHz to 1 megahertz used for transformer is developed, in which pre-processing device and cascaded 2nd order IIR lattice notch digital filter are mainly used to suppress periodic narrow-band interference. With analysis of field monitored signal at a 220 kV substation, it is shown that the monitoring system not only can detect and extract the discharge pulse signal effectively, but also has the powerful capability of suppressing interference.     

Response Spectrum Method for Seismic Response Calculation of Pipeline System Multiply Supported on Structures

In order to ensure the function of building in the earthquake, reduce economic losses and facilitate post-disaster relief, it is necessary to accurately evaluate the seismic performance of pipeline system on the structure under seismic excitation. Considering this practical need, seismic response calculation methods of piping systems on structures were systematically studied. Firstly, theoretical derivation was performed based on the pseudo-excitation method for seismic response of pipeline system. It is found that the formula in previous studies has obvious defect: the accurate relative displacement values of degree of freedom near the supports can not be obtained in the formula. Thereby, the theoretical basis for derivation was mended to correct the defect, and the uniform combination expressions available for pipeline's seismic response calculation which is in the form of ground response spectrum or floor response spectrum were presented. Moreover, the simplified formulas and calculation method of correlation coefficients in the obtained expressions were put forward according to the assumption of white noise earthquake excitation. Finally, case studies were adopted to verify the proposed method's effectiveness and applicability in the seismic response calculation of pipeline system.     

Realization of Intelligent Vehicle System for Target Recognition and Tracking

After analyzing target recognition and tracking technique, a method of developing specifically target tacking system is proposed, which uses digital image manipulation to target recognition. Software and hardware design of intelligent vehicle are presented in detail. The system uses digital image manipulation technology to cognize the certain target through a pickup camera installed on the front of the intelligent vehicle. When the target is moving, singlechip receives the commands from the computer and then control the vehicle to trace target. The system can run by itself, regardless of artificial control. This design provides a platform for the research of Growing Machine Intelligence system.     

A CAD System for Extrusion Aluminum-type Materials

A classifying_coding system in point of extrusion aluminum_type materials based on the statistics and analysis of large numbers of extrusion aluminum_type materials section drawings.According to the Group Technology principle,using the variant design technique,a CAD system has been developed and used in a extrusion aluminum_type materials factory.The system can not only greatly shorten the products design time and reduce the product cost,but also rapidly retrieve extrusion aluminum_type materials section drawings.     

论预制菜的安全追溯体系

预制菜行业发展迅速,但与之配套的安全追溯体系却未能及时建立。实践中,预制菜的安全追溯体系面临着主体分工不明确,追溯范围不清晰以及识别技术不统一等问题。为了预制菜行业的可持续发展,实现预制菜去向可追、来源可查、责任可定,有必要建立起预制菜的安全追溯体系。分析了预制菜行业的食品安全问题,总结了现行食品安全追溯体系的现状与不足,并提出了完善预制菜安全追溯体系的路径,指出应在食品安全法律规范的基础上,明确预制菜安全追溯体系的追溯主体、追溯范围和识别技术,以期推动预制菜行业健康发展,使预制菜吃得放心,用得安心。     

A Practical Expert System for Plant of Tomato

Research for expert system of tomato planting, it intents to set up a all around expert decision system combining agriculture knowledge, scientific research production and practical experience with computer technology. This system makes the best of the modern multimedia computer technology, which gathers words, sound and image .It provides visual, intuitive,scientific and convenient environment using. Moreover, it employs theories of Artificial Neural Network and Expert System, combines experience of experts in tomato's field and simulates agricultural experts to guide farmers to plant tomato.     

Design of Information Technology Application System for Automotive Industry

The situation and the future of the automotive industry information construction is shown in this paper. The significance of Chinese automotive industry information construction is discussed,and the technology base and system structure is also described. The function and the structure of information system by one application of marketing plotting system in one automobile factory's E-commerce are introduced.The important significance for develop and research of product and strategic decision is shown by building market demand information system.