基于ASP.NET的野绿色先锋冶生态网站设计与实现

以野绿色先锋冶生态网站开发为例,介绍了如何以ASP.NET为技术开发平台,使用Visual C#语言开发一个网站的过程。网站设计以Web 2.0为标准,采用了DIV+CSS来表现结构布局。     

A decision support system for soil and water conservation measures on agricultural watersheds

Integrated watershed management (IWM) is vital in achieving agricultural sustainability in terms of both production and environmental protection. A decision support system (DSS) is useful in generating alternative decision scenarios for management of natural resources, facilitating the implementation of IWM concepts in an interactive and holistic way. The decision to implement an appropriate land use coupled with suitable soil and water conservation techniques not only enhances watershed health but also prevents sediment losses. Besides reducing basin fertility, such losses decrease the storage capacity of downstream reservoirs through silt deposition, which can, in turn, give rise to low biomass production and poorer flood control. In order to facilitate IWM, an effort was made to develop, in the Visual Basic programming language, a soil and water conservation DSS which considered both structural and cropping practices for arresting sediment loss. Input parameters to the DSS for a given tract of land included: mean slope; sediment loss; soil type; and land capability class (LCC). Outputs included decision criteria to choose among alternative structural measures and suggested cropping systems to serve as biological measures to reduce soil loss and conserve water. Structural watershed management measures included a variety of soil and water conservation structures widely adopted by farming communities throughout the world. The DSS is capable of providing sediment control solutions not only for small watersheds but also for larger drainage basins, by dividing the basin into smaller watersheds. The DSS was validated for a watershed on the Caribbean island of St Lucia and used to suggest measures for a 10° slope under specific soil type, sediment loss and LCC conditions. The measures proposed included bench terraces, graded contour bunds, conservation ditches, concrete chute spillways, diversion dams and conservation cropping systems. The measures actually adopted on‐site were conservation ditches, graded contour bunds and conservation cropping systems, a close parallel to the DSS's proposed measures. On slopes ranging from 5–55°, implementation of the suggested control measures resulted in a 34–37 per cent reduction in soil loss on the watershed. Copyright © 2004 John Wiley & Sons, Ltd.     

偏心圆盘指夹式幼苗移栽机栽植机构运动轨迹分析

通过分析2ZY–1型偏心圆盘指夹式幼苗移栽机栽植机构的运动规律,设计了Visual Basic程序分析栽植轨迹,结合VB中对轨迹参数的输入、输出数据,得出适合移栽的较理想栽植机构相关参数范围,通过对烟草幼苗的栽植试验分析,得出在吊杯数为4个、转速为11.25 r/min、回转半径为0.360 m的情况下,特征参数λ取1.125时,有利于提高栽植质量和满足农艺要求。     

基于GSM远程水文监测软件的研制*

 利用GSM引擎模块，结合单片机系统和串口，通过Visual Basic编写程序代码，实现数据的无线传输，开发远程水文监测软件。分析了该系统存在的功能限制并提出了改进系统。     

小流域森林生态环境治理决策支持系统的研制

在对小流域森林生态环境综合分析、评价的基础上,针对小流域治理的6大关键技术问题:水土流失治理、更新造林、森林利用及结构调整、植被保护、治理预测及流域信息管理,采用信息系统建立的技术路线,以VisualFoxpro6 0及Areview3 2为运行平台,建立了一个原型化、可操作性强的小流域森林生态环境治理决策支持系统 实现了从合理年伐量计算、采伐地点确定到专业报表输出;从造林规模确定、造林地点确定,造林树种选择、造林技术措施查询、造林投资概算到相关报表输出的自动化技术,为小流域的信息化管理探索方法和途径     

应用Microsoft Excel编写植保专业统计程序的探讨

Microsoft Excel是功能强大的专业电子表格处理软件,利用 Microsoft Excel自带的 Visual　Basic编写程序,对植保专业统计年度报表进行计算,可简化操作过程。且易于推广使用,提高工作效率。     

电液伺服系统在线辨识控制系统设计

利用伪随机信号作为系统的输入信号,对电液伺服系统进行在线辨识的方法,得出系统的数学模型,利用Hankel矩阵法确定模型的阶次,并用多步最小二乘法辨识出系统的开环传递函数.     

期刊编辑部稿件处理 Visual FoxPro 6.0应用程序的设计及应用

目的：编写稿件处理应用程序，提高编辑人员的工作质量和效率。方法；利用微软公司最新推出的Visual FoxPro6．0，可视化编程技术编写稿件处理应用程序。结果和结论：实践应用表明，该软件可大大地减轻了编辑人员的工作负荷，实现了“无笔”稿件处理自动化，可显著提高编辑部的工作质量和效率。     

农业机械化管理信息年报系统设计

针对我国农业机械化管理信息年报工作中存在的信息加工传递不及时、信息管理困难、年报结果滞后于工作需要等问题,利用Visual Basic语言设计开发了"农业机械化管理信息年报系统",初步解决了上述问题,规范了农机化管理信息年报工作,提高了农机化年报信息的有效性和时效作.     

固体废物处理厂地下水污染预测及控制模拟

[目的]以江苏省镇江市新区大港片区某固体废物处理厂为研究对象,对地下水污染情况进行模拟研究,为同类建设项目及企业的地下水污染预测和防治提供参考。[方法]通过系统分析该固体废物处理厂野外水位和水质观测数据以及水文地质条件等资料,利用Visual Modflow软件构建了地下水水流和溶质运移模型。[结果]对厂区污水处理站防渗破损后特征污染物CODMn和氨氮运移情况以及地表硬化污染控制措施对污染物的阻隔效果进行预测评价,数值模拟预测污染物的影响范围、超标范围和最大运移距离。预测时间20a后,污染物影响范围最大,运移距离最远,且CODMn影响范围较氨氮大,运移距离较远;地表硬化后,20a后污染羽未超出评价范围。[结论]污染物主要沿水流方向迁移,对水环境的影响随时间逐渐增大,污染物浓度随着迁移距离的增加而减小,不同污染物在地下水含水层中的溶质运移范围和迁移距离不同。地表硬化措施能有效控制污染物扩散。