温岭供水管网信息系统的集成与优化

介绍了温岭市供水行业在运营管理中建设与应用GIS与SCADA系统的情况,针对GIS和SCADA系统在使用中的不足,提出了利用数据共享和系统集成的资源整合方案,为温岭供水管网运行管理的信息化提出建议。     

供水管网信息化建设及其技术难点探讨

介绍了城市供水管网信息化建设,包括管网GIS系统、供水SCADA系统、管网模型系统的内容和方向,分析了各自的技术难点和一些比较前沿的技术问题,并提出了相应的解决思路.     

浅谈原水管网GIS系统的应用与发展

介绍原水管渠管理分公司管网综合管理GIS系统的框架结构和使用功能,简略描述GIS系统在野外巡检工作中向工作人员提供包括GPS定位、原水设施设备资料的查询、管网监控管理、野外施工进程的监护等相关功能的帮助。展望了原水管网GIS系统与SCADA监测系统的集成,以及基于虚拟仿真、无人机巡检技术的应用模式。     

SCADA系统报警机制的研究与优化

随着信息技术的不断发展和进步,石油行业的管理模式也实现了革命性升级,数字化管理是实现油田提高生产效率的重要手段。第二采油厂SCADA系统的建成,实现了数字化管理的换代升级,革新了生产组织方式。本文主要针对SCADA系统中的报警功能在采油二厂作业区应用过程中存在的问题,从报警算法和报警管理两个部分提出了SCADA系统报警机制优化方案,为今后进一步实现SCADA系统报警管理优化提供理论及应用参考。     

供水企业智慧水务建设——以邯郸为例

供水企业的发展面临着各种机遇和挑战,必须要不断创新管理模式,以适应企业处理日益复杂的供水运营管理需要。智慧水务建设是建立在互联网技术、传感监测、GIS地理信息、多媒体交互等多种技术之上的综合数字化系统体系,在供水企业管理的推广与使用中发挥着不可替代的作用。文中以邯郸市自来水公司为例,介绍了供水企业智慧水务建设的内容和应用案例及其积极作用。     

GIS在沪北供水管网管理中的应用

该文介绍了地理信息系统(GIS)在供水管理中的实际应用和对该系统的规划展望。通过对GIS在沪北所的应用简介,描述了GIS帮助工作人员在室内或户外实现各种设备信息快速查询、图文数字化管理、紧急事故处理、管线规划设计、多种业务数据的统计和分析等。     

管网漏损控制技术在独立计量区的应用

通过选择独立计量区现场测试以及供水管网漏失监测系统的应用,探求适合于小区控制供水管网漏损的研究方法,实现供水管网有效控制,减少管网漏损率。基于GIS地理信息系统平台实现管网动态管理,保障城市供水管网安全运行,取得良好经济效益和社会效益。     

甘森站控SCADA系统安全性分析及应对措施

随着SCADA系统联入因特网以及一些安全事故的发生,越来越多的人们开始关注SCADA系统的安全性。从SCADA系统结构入手,分析了每一个构成单元的安全性,指出潜在隐患,并从法规、系统结构、人员管理等方面提出应对措施。     

工业控制SCADA系统的信息安全防护体系研究

工业控制SCADA系统在科技进步的同时，也在不断地优化与提升，使其服务范围与品质得到了最大改善。在工业控制SCADA系统中，信息安全是非常重要的环节，它对整个系统的安全和管理起到了至关重要的作用。因此，本文将着重对我国企业信息安全的风险进行分析，并提出相应的防范对策，以建立一个良好的网络环境。     

SCADA系统在江西天然气井冈山支线的应用

江西天然气井冈山支线设计采用SCADA系统为数据核心的高自动化控制系统,主要通过研究SCADA系统在井冈山支线的建设标准,明确了系统功能,结合现场实际应用情况,验证了SCADA系统在省级天然气管网中的实用性和可靠性,最后根据工程实践提出了建议,为今后的SCADA系统在省级管网中的建设应用提供理论支持和经验指导。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。