基于ADS8365的多路数据采集存储系统设计

介绍了基于A/D转换器、FPGA、Flash和USB单片机的多路数据采集存储系统的设计及实现过程。系统以FPGA为控制核心,由FPGA控制实现数据采集并将采集的数据存入Flash。在采集完成后,可以读出Flash中的数据并通过USB单片机传输到计算机进行分析和处理。测试结果表明:该系统简单实用,可以对6路模拟输入信号实时采集和存储。     

便携式高精度注塑机数据采集系统的设计与实现

介绍了一种高精度的实时注塑机数据采集系统的设计结构与实现方法。该系统基于USB型高速数据采集卡和笔记本电脑硬件平台,采用了多线程、多媒体计数器等技术将数据采样精度从以前的20ms提高到了1ms。同以往的采集系统相比,该系统具有采集精度高、速度快、能大批量数据采集、使用方便等优点。     

天然气长输管道施工期间数据采集工作管理与建议

管道的完整性管理贯穿了管道的全生命周期,各时期的数据采集工作有助于对管道管理活动针对性地提出建议,减小管道的运行风险。在管道建设期间,各项隐蔽工程充分暴露,采取一定的管理措施,保证采集数据的真实性、准确性,为管道后期巡检监控、生产运营、日常调度、应急管理等提供了丰富的数据支撑,对管道的完整性管理起着重要作用。本文结合某管道在工程建设期间数据采集工作内容和工作流程,分析了数据采集工作中常见的问题,对在建管道的数据录入工作提出了合理化建议,为在建管道的数据采集工作提供了参考。     

一种微型化通用数据采集控制模块的设计与实现

针对信息化时代，工业控制、医疗设备、航空航天的发展，对高精度数据采集系统的综合性能和尺寸提出越来越严格的要求。因此，设计了一种可靠的微型化通用数据采集控制模块，采用尺寸规格为4 mm×5 mm的模块板卡，以FPGA和STM32作为核心处理器，存储模块为32 GB EMMC，接口包括以太网、USB、CAN、RS232、RS422和RS485,FPGA负责数据采集和信号处理，STM32负责数据存储以及对外通信。FPGA和STM32之间数据交互、STM32和EMMC之间数据存储、STM32通过以太网、USB、CAN、RS232、RS422和RS485总线对外通信的模拟试验结果表明：该数据采集系统具有很高的综合性和可靠性。     

气管道中线定位及测量方法研究

各地天然气管道爆炸事故频发,建设数字化管道、开展管道完整性管理的需求愈加强烈,而作为数字化管道和管道完整性管理基础地理信息数据的管道中线数据的采集也成为了重点讨论的话题之一。从管道定位、管道中线测量两个方面分别进行研究,得出了一套管道中线数据的采集方法,并浅谈了在役管道中线数据采集过程中的管道探测要求及测量精度要求,希望能够为在役管道中线数据的采集提供指导。     

管道完整性管理与线路设计

在管道线路设计中引入完整性管理的理念和方法,研究其对线路设计的优化及两者建库基础数据的共同点。通过从管道完整性管理的工作流程入手,在线路设计中识别管道沿线的高后果区(HCA)并采取应对措施,分析对比基于地理信息系统(GIS)平台下线路设计与完整性管理数据采集的特点。明确了管道完整性管理从风险消减与控制层面对线路设计进行优化;同时,完整性管理数据建库中可沿用部分线路设计数据。     

基于FPGA+ARM的数据采集系统设计

设计了基于FPGA与ARM芯片的数据采集系统,FPGA负责控制A/D转换器,保证了采样精度与处理速度,ARM负责逻辑控制及与上位机交互的实现,并将采集到的数据通过USB高速上传至主机进行实时处理。对模拟数据采集的测试结果达到了较高的采样精度和速度,验证了整个系统的高速性和可行性。     

基于多通信技术融合的管道远程数据采集监测系统

利用LabVIEW开发环境设计了一个远程数据采集监测系统。从系统的整体设计方案出发,将客户端有线传输与无线传输结合,利用多种通信传输协议,完成数据的采集与发送。给出了服务器端的部分数据接收程序与监测界面。通过在实际项目中的应用,证实该远程数据采集监测系统可实现对管道泄漏的监测与报警。     

制氢装置数据采集项目过程中的应急措施

天津石化公司数据采集工作开展的较为顺利，初期进行了统一规划和分工布置，经过系统调研、参数标签点审核、工艺流程图电子绘制、现场定位和采集系统升级等一系列步骤，各项目装置平稳度过了数据采集的中间过程。公司炼油部制氢装置作为2012年炼油部设备检修数采升级工作的成员之一，在实施现场数据采集前充分准备，包括针对突发事件制定了多方位的工艺安全措施，以确保装置安全、平稳的运行，同时强化预案演练，提高了相应情况下的装置应急处理能力。     

管道完整性管理与线路设计

在管道线路设计中引入完整性管理的理念和方法,研究其对线路设计的优化及两者建库基础数据的共同点.通过从管道完整性管理的工作流程入手,在线路设计中识别管道沿线的高后果区(HCA)并采取应对措施,分析对比基于地理信息系统(GIS)平台下线路设计与完整性管理数据采集的特点.明确了管道完整性管理从风险消减与控制层面对线路设计进行优化；同时,完整性管理数据建库中可沿用部分线路设计数据.     

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.