Engineering Calculation Mode Based on Reformative B/S Architecture

Engineering designed mode has entered a new stage because of the development of network. New calculating system based on network appeared. By analyzing the common B/S architecture, this paper brings forward an reformative architecture based on Web services and ASP. NET in order to build the new mode of engineering calculation. It can fully implement the sharing of the resources and provide the engineering designers a wonderful calculating environment, and the working eifficiency of designers can be enhanced.     

日光温室茄子冠气温差与环境因子之间的关系研究

系统地研究了日光温室内茄子冠气温差的变化规律与环境因子之间的关系,运用回归方法建立了主要气象因子与冠气温差之间的数量关系。深入分析了不同土壤水分条件下日光温室内茄子冠气温差与土壤含水量的关系,并建立了二者之间的相关方程,得出了诊断茄子水分状况的指标。     

Remote sensing of biotic and abiotic stress for irrigation management of cotton

The applicability of commercially available remote sensing instrumentation was evaluated for site-specific management of abiotic and biotic stress on cotton (Gossypium hirsutum L.) grown under a center pivot low energy precision application (LEPA) irrigation system. This study was conducted in a field where three irrigation regimes (100%, 75%, and 50% ET_c) were imposed on areas of Phymatotrichum (root rot) with the specific objectives to (1) examine commercial remote sensing instrumentation for locating areas showing biotic and abiotic stress symptomology in a cotton field, (2) compare data obtained from commercial aerial infrared photography to that collected by infrared transducers (IRTs) mounted on a center pivot, (3) evaluate canopy temperature changes between irrigation regimes and their relationship to lint yield with IRTs and/or IR photography, and (4) explore the use of deficit irrigation and the use of crop coefficients for irrigation scheduling. Pivot-mounted IRTs and an IR camera were able to differentiate water stress among irrigation regimes. The IR camera distinguished between biotic (root rot) and abiotic (drought) stress with the assistance of groundtruthing. The 50% ET_c regime had significantly higher canopy temperatures than the other two regimes, which was reflected in significantly lower lint yields when compared to the 75% and 100% ET_c regimes. Deficit irrigation down to 75% ET_c had no impact on lint yield, indicating that water savings were possible without reducing yield.     

基于BIM技术与B/S架构的大坝安全可视化监测系统

为了实现大坝整体结构、安全监测测点布置及监测成果的可视化展示功能,并且能够及时、准确地掌握大坝运行状态和异常情况,以甘再碾压混凝土重力坝为例,对传统大坝安全监测系统存在的问题进行了深入的分析与解答,并围绕问题提出了可视化的大坝安全监测系统思想,利用Revit、Dynamo、Civil3D等主流BIM软件建立了大坝主体结构及监测点的模型族库,集成了大坝及监测系统的三维可视化BIM模型.借用于BIMFACE平台轻量化技术、PHP脚本语言和MySQL数据库等现代化信息技术,开发出基于B/S架构的甘再大坝安全可视化系统,实现了BIM模型的Web轻量化展示,可通过客户端浏览器在三维模型中直观查看大坝结构、监测仪器信息以及监测点时程曲线变化等内容.通过本系统的应用,大大提高了大坝运行期间安全监测的可视化管理水平,同时对传统的大坝安全监测系统提出了现代化的建立方式与思想.     

我国几种温室环境控制系统的架构方案

现代传感器技术、通信技术、自动化技术和计算机技术的发展为现代温室控制系统的架构提供了多种可选方案。为此,列举了几种典型的测控系统模式,并简要地分析了其优缺点,最后提出了未来温室控制系统的发展趋势。     

稻茬麦根系构型可视化与三向分型维研究

提出一种根系可视化分析方法用于定量稻茬田环境的小麦根系构型。使用根系构型数字化仪测试稻茬麦苗期根系构型,将所测数据导入Pro/E平台进行根系构型的3-D重构,然后对可视化根系进行3向平面投影,计算小麦根系在不同平面的分形维数与分形丰度。结果表明,该方法可以真实反映出田间稻茬麦根系构型的动态变化状况,而根系分形维数与分形丰度随时间逐步递增,正视图面的分形维数和分形丰度总大于左视图面。从播后第98天开始,俯视图面的根系构型分形维数与分形丰度出现突增。在3个投影面上稻茬麦根系的分形维数与分形丰度都高度相关,二者与根总长也存在一定的相关关系。     

基于冠层温度和土壤墒情的实时监测与灌溉决策系统

设计了一个可以在线连续监测田间作物冠层温度、环境信息和土壤墒情的实时灌溉决策系统,并将其安装于农田进行了1 a实际运行和观测。系统采用太阳能供电和微处理器进行数据采集和管理,为野外的实际应用提供了保障。系统配置了红外温度、空气温/湿度、土壤水分/水势等传感器,能够及时采集田间全面的同步数据,排除了异地观测所形成的数据误差。采用悬臂式多点采集下垫面红外温度检测方法,可以快速采集更多和更高精度的数据,避免单点测量的人为误差。系统配备的快速锁紧装置,能够根据下垫面作物的生长情况进行传感器位置高度调节,使检测数据更符合田间实际情况。通过运行管理和监测数据分析可见,所监测数据能够很精细的刻画田间作物实际生长状况,可以用于灌区综合灌溉决策,实现田间精量灌溉管理和控制,为灌溉管理的精量化和智能化提供数据支持。     

基于SSH框架的图书管理系统设计

SSH架构能够降低系统代码的耦合性,提高系统的维护性和扩展性,是当前比较流行的3种框架,本文以图书管理系统的开发为导线,给出开发中实现三者集成的方法步骤。     

广州河涌景观变更对城市公共生活的影响分析——以东濠涌改造为例

广州水岸公共景观的变更影响着城市及人们的公共生活。本文通过分析东濠涌的沿岸公共活动变迁及其2010年的改造实例，探讨水岸环境与沿岸公共生活类型之间的关系。