MATLAB和VB在温室环境模型构建中的混合编程研究

旨在找到一种MATLAB和VB混合编程的方法,实现日光温室热环境模拟模型软件的可视化编写。采用基于组件对象模型COM（component object module）的方法,研究了MATLAB和VB在模型构建中的混合编程。采用MATLAB软件编写M.源函数文件,实现理论模型中的工程计算和图像图形处理功能,M.源函数文件编译成功后,通过COM方法转换为可被独立调用的组件;采用VB软件编写主程序文件,实现良好的人机交互功能。在主程序中完成模型各项参数的赋值后,再调用COM组件进行理论模型的计算与绘图。COM组件方法可以实现MATLAB和VB的混合编程。以此构建的日光温室热环境模拟模型软件,可在主程序输入各项参数：室外气象条件,温室结构、热性能等,模拟室内热环境的变化。     

Component Object Programming and Component Standard

With the development of software technology, especially for the requirment of distributing computing, Component Object Programming has been developed very quickly. This technique allows any two component to cmmunicate between different courses, different computer, different computer language and different operating system. Component Object Model(COM)is a network standard set up by Microsoft. COM is a recognized standard too. This paper starts with analyzing traditional methods of software development, and introduces the idea of Component Object Programming and component standard.     

Analysis of Interpolate-compensation Component of Open CNC System Based COM

CNC system is gradually developing toward flexible, component modular and re-configurable of open CNC system's structure. It's beginning a research direction in open CNC system with the software reuse and re-configurable technology. Based on the expound of concepts and characteristics of component technology, open CNC system's characteristics are analyzed based on COM and open CNC system is divided into several components. With the characteristics of binary language irrelevant, thread transparent, re-configurable and normative interface of COM technology, open CNC system's interpolate-compensation component in interpolate-compensation component achieved, interface designed and object created are researched. Better effects are achieved by connecting the interpolate-compensation component with the other CNC components. At the same time, the CNC component's real-time control problem is analyzed.     

Analysis of I/O Component of ICT Control Software Based COM

To implement the reuse of industrial CT control software, make the product easily maintained and upgraded, the control software of industrial CT based COM is researched. With the characteristics of language irrelevancy, reuse of binary codes, expansion, the industrial CT control software are divided into several components according to the control function of industrial CT, and the I/O component is developed. Better effects and open characteristic are achieved while this component is communicating with the Client program.     

基于WEB和RS-485总线的分布式远程环境监控系统的实现

提出了一种针对温室环境监测的基于WEB的数据采集和信息发布系统设计方案,并从软、硬件的角度详细介绍了系统的实现方法。该系统应用MS VB.NET开发工具,采用ASP.NET 技术规范,构建了B/S（Browser/Server）模式下的远程监控系统。硬件系统通过RS-485总线与数字传感器连接,并与具有联网功能的PC监控计算机构成温室现场监控系统。该系统不仅能够通过Internet远程浏览访问温室现场数据,而且能对系统运行参数进行远程修改和设置。该系统不仅可以实现对温室环境的异地和远距离数据监控管理,而且也可应用于农业的其它领域。     

Application of Communication between PC and Multi SCM in Vehicle Transmission Test Bed

In existing equipment vehicle transmission test bed can be controlled only by 8031 SCM and data can not be transmitted from SCM to PC. In order to take most advantage of available equipment, data transfer between PC and Multi SCM is put forward. By this way, torque of eddycurrent dynamometer can be controlled by PC programs and satisfy the needs of torque convert experiment. Making use of Dynamic Link Library 8250 registers can be read and written directly. Programs can set the ninth bit easily without Microsoft Communication Control. Data are transmitted between PC and Multi SCM though RS232 COM successfully by using Visual Basic programs. Cost and time are sharply reduced.     

基于物联网技术的农业气象观测系统的研究与设计

为了更好地实现农业气象数据观测的实时、可靠、准确性,研究设计了一种基于物联网的农业气象观测系统。该系统在Eclipse的开发环境中,利用B/S模式和专业数据库实现数据采集与应用实时结合的功能,解决了过去气象部门数据与应用软件分离,监测、分析功能实时性不高的问题。同时,后台应用软件利用前端无线传感网络的实时数据,并结合专家知识自动向用户推送农业气象预报信息。综上所述,研究设计的农业气象观测系统信息推送准确及时,极大地满足了现代农业对气象服务精准化的需求。     

Design of the distributed wireless monitoring system

For the limitations of the traditional monitoring systems under the circumstances of dispersed monitoring points, wide distribution range and the harsh environment, a distributed wireless monitoring system based on radio frequency technique is designed. The system adopts the ultra low power consumption MCU MSP430 as the main control chip and extends several processing module in the periphery. In addition, the multi channel transceiver nRF905 is used for wireless data transmission. The software and hardware design scheme of the proposed system and the communication protocol for distributed data transmission are discussed. Frequency hopping mechanisms are employed to increase the reliability of data transmission. The results show that the proposed system has the characteristics such as flexible use and excellent mobility, while can monitor multipoint data in special environment in real time.     

农业大棚温度自动记录仪设计

为了便于实时监控农业大棚温度的变化,设计了测定农业大棚小环境的温度自动记录仪。该记录仪采用数字温度传感器、单片机、显示器和I2C器件。软件设计主要包括：温度信号的采集、温度数据的储存与读取、汉字与采集结果的混合显示3个模块;通过对系统的设计进行Proteus仿真,结果表明系统的软硬件设计正确。     

Sharing knowledge via software components: Models on reference evapotranspiration

Evapotranspiration (ET) is a cross-platform software component containing routines to estimate daily and hourly values of reference evapotranspiration (and related variables) according to alternative approaches. A standardized form of the FAO-56 implementation of the Penman–Monteith equation is used to estimate daily and hourly evapotranspiration for two reference surfaces (namely clipped grass and alfalfa). Other methods (implementations of Priestley–Taylor and Hargreaves equations) estimate daily evapotranspiration from limited sets of inputs. A multi-layer canopy, similar to a well-developed tomato crop within standard greenhouse conditions, is taken as a reference to estimate hourly evapotranspiration in greenhouse environment (Stanghellini approach). The component is released as .NET (C#) version, allowing the development of clients under Windows operating systems. The component has an extensive hypertext help file. The component design allows users developing client applications to extend the functionalities by adding further options for estimating reference ET. Illustrative examples of clients developed in C# are provided as source code; the component is made available as compiled version. Also, the component was used to activate a web service and a web application based on such a service; the relevant C# code is provided as example.     

Application of FODA in the MIS Reusable Component Development

Domain engineering is an activity for building reusable components. Domain engineering addresses the systematic creation of domain models and architectures. Domain analysis is a software engineering process that identifies, captures, organizes, analyzes, and represents information about a software domain to determine software architecture, framework, and component, and to support the reuse or software components. This method is one of the key techniques to solve the reuse problem. The article introduces the Feature-Oriented Domain Analysis (FODA), developed at the Software Engineering Institute (SEI). The article mainly discusses the application of FODA in the MIS development reusable component. It proves that FODA is an effective and efficient way to develop reusable component.     

Research and development of the real time remote monitoring control system of hybrid electric vehicles

This paper develops a vehicle carried remote data acquisition terminal based on GPS/GPRS integrated DTU(data transfer unit) and CAN Bus data acquisition module, and built a parameter remote monitoring system of HEV with GPRS and Internet. By using PIC18F4580 with built in CAN control module and industrial DTU MD610G, we transmitted the parameter data and GPS information of the HEV(Hybrid Electric Vehicle) terminals to the remote data control center through GPRS(General Packet Radio Service) and INTERNET. Taking VC++ as the development tool, we programmed a monitoring software of data exchanging, data processing and monitoring. The software also has the function of CANoe data playbacking and strengthened the system versatility. Eventually, the parameter remote monitoring system of HEV is developed. The experiment results show that the system works well.     

基于国产基础软件的农产品

为建立农产品安全溯源机制,促进国产基础软件在农产品质量安全监管领域的应用,分析果蔬、畜禽等农产品的流通特点,设计农产品质量安全管理和溯源查询业务构件库,将农产品溯源编码与生产流通环节的关键信息有机结合,基于国产基础软件提供的支撑运行环境,搭建农产品质量安全溯源管理系统,为政府、企业和消费者建立基于国产基础软件的农产品质量安全信息交互和综合管理平台,通过示范应用,有效可靠地实现了对农产品流通全程质量监管和信息溯源,提升了农产品质量安全管理水平。     

基于AHP法的大口径PCCP管道断丝安全风险管理

如何有效地对大口径PCCP管道断丝后管道结构的安全进行合理地评价,以便采取积极有效的维修措施,是减少南水北调大口径PCCP管道运营期间断丝安全风险的有效途径。提出利用层次分析方法(AHP)建立PCCP管道安全风险层次分析数学评价模型,对影响南水北调地下大口径PCCP管道断丝的各种可能因素进行专家打分,同时,通过数值模拟计算,建立PCCP管道安全失效的判断准则及判断标准,实现大口径PCCP管道安全风险评价的定量化。在此基础上,开发出一款专门针对南水北调中线PCCP管道工程安全运行风险实时监测的管理软件。该软件系统采用自动化实时监测技术和基于Web-GIS的风险管理系统。该系统能完成监测数据的实时采集、数据档案的电子化管理以及安全风险的动态评估与预警预报。     

基于ZigBee的工厂化水产养殖溶解氧在线监控系统设计的研究

为了采用分散控制方式对工厂化水产养殖溶解氧进行监控,提出了基于ZigBee的溶解氧在线监控系统。系统采用集散控制模式,分为终端节点、路由节点和网关节点以及监控中心4个层次。终端节点采集养殖池中溶氧量,然后通过路由节点汇聚到网关节点,并根据溶氧量对与之连接的增氧机进行控制。网关节点将所有终端节点数据传输给监控中心,并接收监控中心的控制指令,进而通过各终端节点控制增氧机。同时,监控中心对数据进行存储、统计和分析,并产生控制指令。ZigBee节点采用CC2430作为核心芯片,使用ZigBee2006协议栈实现无线网络节点之间的通信。结果表明：该系统稳定性较好,部署灵活、容易扩展,满足了工厂化水产养殖的要求。实现了对溶解氧的在线实时监测及对增氧机的有效控制,降低了养殖成本。     

基于物联网的农田环境监测无线传感器网络的管理

针对农田环境监测无线传感器网络中网络节点电量和处理能力有限等特点,分别从网络拓扑管理、位置管理、能量管理和故障管理等4个方面提出了一套完整的网络管理方案,以对网络运行状况进行监测和管理。为了用户能够远程监控和管理无线传感器监测网络,开发了远程监控管理平台,该平台由后台数据库和前端监测管理软件组成。试验结果表明,所提出的网络管理方案,能够实时监测网络的运行情况,及时诊断网络中的异常,保障了网络正常运行、数据实时传输;所开发的远程监控管理平台人机交互界面良好、功能完善、运行稳定,实现了用户对无线传感器监测网络的远程管理和对农田环境的有效监测。     

GIS湿地生态环境监测与管理信息系统的建设与应用

进行气象与大气环境、生物、土壤、水体、自然灾害等项目的湿地生态环境监测可以为科学地进行湿地生态系统管理提供依据。以更好地完成湿地生态环境监测为目的建立的GIS湿地生态环境监测与管理信息系统由通过系统集成的空间数据库和属性数据库构成,具有数据采集,数据输入与输出,数据统计与查询,空间分析以及比例尺变换、投影变换等一些与地图本身特征相关的功能。在对湿地生态系统进行科学管理的过程中,GIS湿地生态环境监测与管理信息系统具有进行湿地遥感分类、湿地植被生物量遥感估测、湿地景观格局演化及湿地退化分析、进行湿地评价和辅助湿地自然保护区建设等重要作用。     

中红外光谱技术在土壤环境研究中的进展综述

土壤是农林业生产的基础,高效、全面地获取土壤信息对于土壤管理意义重大。由于土壤有机组分较为复杂,采用传统的化学分析方法难以全面地获取土壤有机组分信息。中红外光谱(MIR)分析技术作为一种无损、实时、高通量的分析手段,具备高效、准确地获取土壤有机环境信息的能力,可为土壤环境监测、数字制图、农林业生产提供大量基础数据,有助于实现土壤环境实时监测和农林业信息化。笔者简述了中红外光谱技术获取土壤环境光谱信息的检测过程和光谱数据处理方法,综述了近年来国内外学者在土壤中红外光谱特征提取、影响因素等方面的研究进展,并针对该技术深入研究土壤学的意义及未来的发展方向进行了讨论。     

Data Collection and Control Discuss of GPS Technique and Its Application in Landslides Monitoring

Water level has risen considerably since the impounding of the Three-Gorges Reservoir in year 2003 and that might cause serious geologic hazards, including landslides. Primarily using GPS technique, the landslides wireless monitoring in the Three-Gorges Reservoir is developed in rapidnly. To collect data and monitor in engineering more rational, the system model of GPS technique and its application in landslides monitoring are analyzed. Focusing on the data collection in monitoring, the authors discuss the method of embedding control in the monitoring model. By connecting the character of the monitoring system and landslides, the control signal is produced. At last, the experiment is performed with analogy software in monitoring system including control. The experiment indicates that the control signal is reasonable and valid. In actual engineering, this method is made progress.     

Application of BP Neural Networks in Inventory Dynamic Modeling

The authors establish an original inventory model based on BP neural networks in dynamic environment using the inventory history data, and overcome the net overfitting problem occurred with insufficient samples by using early stopping method. After a simple-relation inventory model training is attained, they get inventory model and analyze it dynamically by reconstructing the model after getting new sample data. An example is provided to illustrate the model. The theoretical evidence is provided for the inventory system to make management decision.