单片计算机技术在智能仪器设计中的应用

本文分析了传统仪器的结构和特点，提出了利用单片计算机进行智能仪器设计的优点以及设计过程，并以有效油耗智能测试仪的研制为例，说明了智能仪器的整体设计方法和步骤。     

Peste des petitis ruminants morbillivirus infection in lambs and young goats at Qassim region, Saudi Arabia

An outbreak of peste des petits ruminants (PPR) in lambs and young goats of Najdi breed of sheep and goats occurred during winter 2005 at Qassim region of central Saudi Arabia. The PPR infection was confirmed by demonstration of antibodies against the virus in the serum of clinically-ill young sheep and goats using competitive ELISA test. Clinical examination of infected animals showed fever, salivation, lacrimation, mucopurulent nasal discharge, difficult breathing and diarrhoea. The disease was particularly severe in the goats. Morbidity was about 20% and mortality was less than 3 percent. Autopsy showed necrotic and ulcerative lesions in the mouth, stomach and intestine. Mesenteric lymph nodes were swollen and congested. The lungs were patchy pneumonic mostly at the diaphragmatic and apical lobes. Liver and kidney lesions were seen in goats only and both organs were congested and necrotic. Histopathological examination revealed necrotic inflammation in the gastrointestinal tract. Intracytoplasmic viral inclusions were seen in the enterocytes of goats. Lung sections showed bronchopneumonia and syncytial and giant cells. The bronchial epithelium of goats had intracytoplasmic viral inclusions. Extensive coagulation necrosis, fatty degeneration and presence of intracytoplasmic viral inclusions were seen in hepatocytes and syncytial cells were evident in biliary epithelium of goats. Congestion, coagulation necrosis and syncytial cells were seen in the renal tubular epithelium of goats only. In a survey to determine the magnitude of the outbreak, PPR antibodies were evidenced in 363/996 (36.6%) sheep and 530/962 (55.1%) goats.     

Interaction between attaching-effacing Escherichia coli O26:K60 and O157:H7 in young lambs

Recent surveys have shown that Escherichia coli O26 is prevalent in ruminants compared with E. coli O157. These serogroups share common colonisation factors and we hypothesised that prior colonisation by E. coli O26 may show reduced colonisation by E. coli O157. To test this hypothesis, strains of E. coli O26:K60 and O157:H7 were tested in competitive in vitro and in vivo studies. Using an established 6-week-old lamb model, an experimental group of lambs was dosed orally with E. coli O26:K60 and then E. coli O157:H7 four days later. The faecal shedding of O26:K60 and O157:H7 organisms from this experimental group was compared with that from animals dosed with either O26:K60 alone or O157:H7 alone. Shedding data indicated that counts for O157:H7 were unaffected by the competition from O26:K60, whereas the O26:K60 counts were lower when competing with O157:H7.     

动物源性食品中泰乐菌素残留ELISA试剂盒的研制

采用杂交瘤技术,筛选并克隆出能够稳定分泌抗泰乐菌素（TYL）单抗的杂交瘤细胞株,免疫BALB／c小白鼠制备抗泰乐菌素单克隆抗体,建立泰乐菌素竞争ELISA检测试剂盒。结果表明,logit／log拟合标准曲线为y=-1．84x＋2．02,相关系数r=0．9944,线性检测范围为1．5～121．5ug／L,半数抑制浓度（IC50）为10.3ug／L,灵敏度为1．5ug／L,检测限为1．5～3．0ug／L;肌肉、肝脏、蜂蜜的添加回收率分别为64％～99％、61％～102％、60．5％～95％;平均批内和批间变异系数均小于10％;泰乐菌素与替米卡星（TIL）的交叉反应为40％,与其他类抗生素无交叉反应;此泰乐菌素试剂盒在4℃可保存6个月以上。本文建立的竞争ELISA检测方法可用于动物源性食品中泰乐菌素残留的定量检测。     

高氟对中枢神经系统的影响

综述了氟对智商影响的流行病学调查结果,并通过总结氟对中枢神经系统的直接损伤和氟与其他元素互作对中枢神经的影响,多角度阐释了高氟对中枢神经系统机能影响的机理.     

基于模糊控制与虚拟仪器的灌溉决策系统研究

针对节水灌溉受多因素影响难以建立精确控制模型的特点,开发了基于虚拟仪器平台的作物灌溉模糊决策控制系统。该系统由传感器、测量仪、数据采集卡、LabVIEW软件平台等组成,将土壤水势和作物腾发量作为输入量,采用Fuzzy Logic Control Toolkit工具包设计模糊控制器,建立多因素控制规则库,实现作物灌溉需水量的模糊决策。试验结果表明该系统界面友好,操作简单,能对作物需水量进行综合判断与决策管理,为节水灌溉提供科学的依据。     

试论高校图书馆有偿服务的方向——竞争情报

从开展有偿服务的必要性和现状出发,指出竞争情报服务是高校图书馆有偿服务的最主要的形式,并提出了高校图书馆如何提供竞争情报。     

人工智能气候室中灵芝富硒栽培研究

[目的]在人工智能气候室中研究富硒灵芝的栽培方法,为灵芝商业化栽培和富硒产品的研究开发提供参考.[方法]以硒矿粉为硒源,以灵芝为富硒载体,采用固体基质栽培方式进行富硒灵芝培养,结合多糖和总三萜含量进行综合分析.[结果]6个试验处理的固体基质菌包分别添加0(CK)、1000、2000、3000、4000、5000μg硒,...     

基于人工智能技术的竹类主要害虫识别系统在森防场景中的应用

人工智能技术及其应用已成为林草业重点建设领域的重要支撑和业务创新增长点。在四川省竹产业大发展背景下,邛崃市将基于人工智能技术开发的竹类主要害虫识别系统应用于竹产业基地森防场景,实现了对竹产业基地的害虫智能识别,并衍生出害虫发生情况统计分析、管护员巡护管理等智慧化管理手段,促进了当地竹产业基地的精细化管理,探索了竹产业现代化的新途径,为竹产业建设迈入智慧化目标提供了支撑。文中介绍了该系统采用的人工智能技术及相关功能的实际应用,并对相关成果在森防领域开展更广泛的后续应用进行了展望。     

我国企业竞争情报的现状和对策

我国企业对竞争情报的认识和研究不足,在全球信息竞争日益激烈的今天,我国企业如何适应竞争情报的需要,文中通过对中外企业竞争情报开发现状的比较,指出我国企业开展竞争情报战略的对策。