基于百度AI平台人脸识别技术的校园食堂结账系统

基于百度AI平台人脸识别技术,介绍了一种校园食堂结账系统的软硬件设计及其制作。该系统的核心环节是对人脸图像采集终端模块的设计。即以ARM Cortex-A9 Exynos4412开发板为硬件基础,以Qt Creator为软件开发平台,利用高级的C++代码编辑器、可视化Ui终端界面设计,模块之间采用http数据传输协议。Web服务器模块采用Sqlite3数据库存储数据信息,根据人脸图像采集终端模块的操作,实时更新数据库信息,便于客户端实时数据请求。     

ASP.NET实现Web数据分页浏览

针对Web数据库的特点,提出利用ADO.NET的对象实现Web数据库查询及其分页显示的通用方法,然后以实例讨论Web数据库数据记录分页显示的程序设计方法,并给出相应的程序源代码。     

电力调度自动化系统中WEB服务器的应用探讨

本文介绍了web技术是一个开放性的技术,它允许任意地点的用户通过web浏览器接入网络,访问web服务器发布的各类信息,Web服务器可以与系统Oracle数据库进行连接,在受权客户机上显示变电站的遥测、遥信数据,通过Web服务器登陆到历史Oracle数据库,可以查看Oracle数据库服务器系统资源使用情况。     

Ajax技术在基于Web的实时监控系统中的应用研究

针对以往基于Web的实时监控系统在实时性方面的不足,利用Ajax技术设计了一种新的工业过程实时监控系统框架,该系统采用多层B/S模式软件体系结构,依据OPC规范设计,应用Ajax技术实现了动态更新Web页面中的数据.     

基于Web的DCS数据监控系统设计与实现

介绍基于Web的DCS实时／历史数据监控系统的设计方案与实现方法。在根据OPC规范实现异构数据获取的基础上，采用B／S模式和IIS6．0并采用ASP结合SQL Server数据库以ADO和VML等开发了动态、交互和高效的DCS管理系统。该系统采用ActiveX实现了在Web页面上查看、查询工控和计量数据以柱状图和表格显示，并可进行统计或做数据修改。系统以IIS为基础，可在局域网内和Internet上使用，为管理人员及时掌握生产数据和更快地决策提供了可能。     

基于MySQL数据库的储气库数据管理系统

为实现储气库的数字化管理,将My SQL数据库引入到储气库数据管理系统的设计中,运用E-R模型进行概念结构设计,实现My SQL数据库的储存、修改和删除等功能,并实现利用Web浏览器访问My SQL数据库。结合文96储气库建设期和运行期数据,能够通过Web网页快速查询My SQL数据库中的基本信息,利用VisualStudio设计了数据库可视化界面,对储气库的数据显示和数据统计分析功能进行优化改善,实现了文96储气库数据系统的数据管理。实例表明,My SQL作为数据的管理和传输手段,在储气库数据系统数据管理中取得了良好的效果,为储气库数字化管理提供基础和保障。     

三维模型在工业管道安装工程中的应用研究

基于BIM技术对PIMS管道安装管理系统软件进行了再度研发,将建模软件和数据库管理系统有机结合,实现了模型基础信息在数据库管理系统的准确应用、进度信息实时显示、施工过程信息数据交互,进一步规范了项目过程管理,提高了管理效率。     

物联网技术在注塑车间环境监测系统中的应用

针对注塑车间环境变量众多且难以综合监测的问题,设计了基于Zigbee技术的物联网注塑车间环境监测系统。该系统由感知子系统、网络通信子系统和显示子系统共三个部分组成。感知子系统由光照传感器和温湿度传感器组成,用以采集注塑车间内光照强度及温湿度信息作为环境数据;网络通信子系统采用Zigbee物联技术搭建局域网,使用Zigbee网关服务器,将传感器的环境数据传输到显示子系统;显示子系统设计出相应上位机软件与移动端软件用以实时查询环境数据。选择多个注塑车间对该系统进行测试,结果表明:该系统可以实时监测注塑车间环境的温湿度及光照强度信息,使工作车间具有危险提前预防功能,同时具有较好的应用价值和发展前景。     

基于工业色谱仪的上位机色谱图处理

工业色谱仪是一种精密的过程分析仪器,但其现场运行环境一般比较恶劣。为此采用LabWindows/CVI开发了工业色谱仪的仿真系统用于监控仪器的运行状态,主要研究对采集到的谱图数据进行谱峰参数的识别与显示,最终实现色谱峰的识别,并可以通过用户界面查看历史、实时谱图信息,对分析结果标定显示。结果表明:该方法可以对谱图数据进行有效的分析与显示。     

基于油田井场的燃油在线监控系统

为了实现对油田井场柴油的实时监控,设计了一种无线式的基于油田井场的燃油在线监控系统。通过现场对柴油油罐进行实时监测,采集数据信号,经由GPRS无线通信传输到数据采集发布系统,并存储到数据库。继而通过Web服务器发布所采集的数据,实现对现场柴油的实时监控。     

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.     

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。     

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.