实用型荔枝虫害诊断专家系统设计方法研究

针对大型检索表为表示的专家知识体系,研究提出了一套可重用的、实用性强的系统设计方法,建立了荔枝虫害诊断专家系统(LDS)。经生产示范应用表明:实现了人机操作界面直观、明了,降低了客户端的专业要求,提高了系统的实用性。还对系统所构造的人机界面、知识存储结构设计和控制策略给出实践示例。     

基于ASP.NET的粮库虫害诊断专家系统

采用B／S／S三层体系建立系统，分层产生式规则更接近于人的思维，有效地表达了粮库虫害领域的知识；知识库与推理机分离使得维护知识更加快捷；自动生成界面简约、方便，易于操作；系统通过ASP．NET发布在网上，可以进行远程操作。     

基于知识模型的作物适应性评价专家系统设计

系统引入了知识模型概念,建立了以知识模型为特征的知识系统,将知识工程、数据库有机结合,采用正向与反向相结合的推理控制策略,建立了基于知识模型的作物适应性评价专家系统,实现了作物适应性评价的计算机辅助决策,具有较强的跟踪解释能力。用本系统对江苏省地区小麦适应性还进行了实例分析。     

杜鹃虫害防治方法

1.网蝽:以成虫和幼虫在叶背为害,吸汁排粪,使叶正面出现密集的小白点,严重影响了植物的光合作用,导致植物生长衰弱,提早落叶。防治方法:①冬季清除枯枝落叶以灭越冬害虫。②害虫大发生前,用40％氧化乐果1200倍液、80％敌敌畏1200倍液喷杀。2.蓟马:成虫和幼虫均能危害叶片和嫩芽,吸取叶汁。受害叶片长成虫瘿,严重影响植物的生长和观赏。     

仙人掌虫害防治方法

红蜘蛛常在植株的幼嫩部位吸吮汁液,受害植株生长衰弱,茎部脱落或球体呈现火烧状的黄褐色斑痕。即使在喷药杀死虫体后,斑痕也不能消除。使植株失去观赏价值。一般在高温、干燥、通风不良的情况下,发生与蔓延很快。防治措施:1.预防为主,改善栽培条件。夏季可     

咖啡虫害防治方法

<正>咖啡豹纹木蠹蛾分布很广,是常见的咖啡害虫之一,能为害多种经济作物。以幼虫在枝干内越冬,幼虫在枝干内常向上蛀食,形成30～60厘米的隧道。防治方法:①结合咖啡树整型修剪,把受害的枝条剪除,集中烧毁。②用铁丝捅入虫道把幼虫刺死。③从虫道孔注入1∶10倍敌敌畏水剂,然后用沾药的棉花塞入洞内,再用泥浆封住洞口,如此可毒杀为害咖啡主干的幼虫。介壳虫类①咖啡绿介壳虫无论成年树或幼苗均可为害,枝、叶、干、果都是为害对象。旱季发生严重,雨季虫口数量急剧下降。受害树上常有蚂蚁活动。     

甜叶菊主要虫害的发生与防治研究

随着甜叶菊栽培年限的延长，虫害呈逐年递增的趋势，针对蚜虫、蝼蛄、地老虎、夜蛾、尺蠖等甜叶菊主要虫害的发生特征和规律，提出了防治方法。     

苏铁新虫害初探

去年有花友提醒我：最近发现铁树里有虫专吃嫩芽，而且来无影去无踪。当时我想，养了几十年的铁树从没见过有虫，便没当回事，没想到今年偏巧就碰上了。第一次在今年6月中旬，我外出三天，回来见一棵发了很多新芽的铁树，一丛新芽转眼间变成了一堆芽渣，也没见到虫影。第二次在9月上旬，清晨起来发现铁树的一片嫩叶被虫咬得残缺不全（图1）。     

读者意见选登（一）

我出生在农村，从小就很喜欢养殖业和种植业，去年订阅了《科学种养》杂志，觉得贵刊内容丰富、实用性强，从中学到了很多科学种养知识，受益匪浅。村上的朋友常向我借阅该杂志，都称赞《科学种养》是农民致富的好帮手。     

作物形态诊断人工神经网络专家系统的研究

本文使用计算机图像识别系统对作物形态进行自动提取，并设计了一种用于形态诊断的人工神经网络专家系统，它较好地解决了传统专家系统所面临的知识获取和表达、系统扩充困难等问题。达到计算机对作物形态性状信息自动提取和智能诊断之目的，为实现作物因苗管理、分类指导、提高科学管理水平提供技术支持。     

专家系统在果树中的应用及研究进展

专家系统是一种模拟人类专家解决领域问题的计算机系统,它主要分为知识库、综合数据库、推理机、解释器、接口等几部分。现今,国内果树专家系统的应用类型主要分为果树栽培生产专家系统和果树营养、病虫害诊断防治决策系统两类;在果树专家系统上的应用研究最多的计算机理论主要是：人工神经网络、模糊神经网络、多媒体技术、Web技术等;果树专家系统的开发手段主要是利用现成的农业专家系统平台直接进行二次开发,还有少数是直接利用程序语言进行原型系统开发。今后随着信息技术的不断发展,利用果树学的特点结合先进的计算机理论和技术,将开发出动态的、更具智能化的果树专家系统。     

An Expert Knowledge-acquisition Method on Line of Automatic Excluding Errors

Aimed at soving the problem existing in the knowledge-acquisition directing-operation expert systems, a new method is proposed to acquire knowledge of expert-operation, excluding errors existed in examples and reinforce the accuracy of examples,the goal of knowledge acquisition can be achieved, the method presented in this paper solves the problem of self-enhancement of expert knowledge on line efficiently.     

农业专家系统开发平台的研究现状及发展趋势

在中国，特殊的国情造成农业专家一般对计算机及其相关技术十分陌生，知识工程师对于农业知识知之更少，使得开发农业专家系统十分困难。专家系统开发平台的出现，使这个问题得到了缓解。农业专家无需掌握过多的编程知识就能建造性能良好的专家系统，而知识工程师只需研制开发平台，并根据领域使用要求，修改完善平台，无需掌握领域知识，两者相得益彰。在此，综述了近几十年国内外农业专家系统开发平台的研究及应用现状，提出了存在的问题，并介绍了农业专家系统开发平台的发展趋势，为农业专家系统开发平台在中国农业信息化中更好地服务提供参考依据。     

A model of a hall for a workshop of metasynthetic engineering

A hall for a workshop of metasynthetic engineering (HWME) is constructed based on network services, in which the expert, machinery and knowledge systems are combined with services. This hall is an expansion of the traditional workshop hall. The     

Applications and Development of Expert System in Wastewater Treatment Systems

This paper introduces the structure and characteristic of an expert system based on characteristics of wastewater treatment such as time-variation,nonlinearity,complexity and uncertainty.The paper then analyzes the status of wastewater treatment systems studies and existing disadvantages of expert systems.It shows that expert systems have been applied in nearly all aspects of wastewater treatment systems in other countries,but only initial work has been done in the People's Republic of China.The authors introduce the prospects for and trends in the application and study of expert systems in wastewater treatment.     

Knowledge Representation for Rotative Machine Fault Diagnosis Based on Semantic Net

Aiming at knowledge representation problem of expert system for rotary machinery fault diagnosis, semantic net knowledge representation is discussed. Semantic net to represent expert knowledge of rotary machinery fault diagnosis is explored. Its realizing method is afforded in computer language, in addition, demostrating model is also developed in Visual C++. The result shows good validity of the knowledge representation.     

A Vovel Constracture of Combinatorial Knowledge Base for the Expert System of Eletrical Switching

By comparing the techniges of the production and the logic predicate for knowledge representation, this paper presents a kind of constructure of combinatorial knowledge base applied to the expert system for switch operation in electric power system . This constructure of knowledge base to be expanded and revised easily,and it is cinvenitnt to build the general shell of the expert system.     

A Real-time Expert System Based on Adaptive Predication of Process State

The combination of the measured real time state acquisition from the process with predictive process for the fature state is used to predicate the variable tendency for process state. This method is useful to avoid delay and enhance real time ability of the control information of the expert system. Also a described knowledge and structure of real time process state are proposed. This system can be applied to other kind of practice systems with slow time variable, uncertainty and delay.     

Research of Expert System for High-rise Buildings Foundation Scheme

In this paper, the factors influencing the foundation scheme of high-rise buildings are analyzed. In accordance with the complex hierarchical structure and the uncertainty of foundation scheme, a knowledge base of hierarchical structure is set up and an inexact reasoning is realized. Then, the expert system for high-rise buildings foundation scheme (TBFES) is built on the knowledge base with the expert system tool CLIPS.