基于LabVIEW的FPSO陀螺仪3D姿态实时监测系统

设计了一套FPSO陀螺仪3D姿态实时监测系统,给出了该系统的软硬件结构。系统基于LabVIEW虚拟仪器技术的三轴加速度数据提取程序,并设计了FPSO运动姿态实时显示人机交互界面。实验室测试结果表明:该系统能实时监测并还原FPSO运动实体的姿态。     

基于ProfiBus总线的污水监控系统设计与实现

应兰州石化污水处理厂风险应急预案的需求,根据现场设备型号种类多、安装分散的现实条件,设计了由西门子S7-400H构成的基于ProfiBus总线的污水监控系统。系统采用带监控站的结构体系,可远程实时监控各分站的工况,并对现场受控设备下达控制指令,以保证处理后的污水指标在受控范围。本系统自投入使用以来,运行稳定、安全可靠,达到了设计目标。     

伺服液压系统在液压轮胎定型硫化机中的应用

液压系统是液压硫化机的动力单元,通过伺服液压系统与常规液压系统对比试验可以看出伺服液压系统在节能、降噪及提高液压硫化机运动平稳性方面有明显的优势,将会在液压硫化机中得到广泛的应用。     

基于Uniformance的实时生产管理系统设计

本文介绍了基于HONEYWELL的Uniformance平台构建的化工企业实时生产管理系统,该系统将各单元生产信息与企业管理信息有机的结合,实现了实时数据采集、生产监控、计控指标管理、关键连锁跳车报警、标准开停车曲线等方面的有效管理,从而进一步降低了化工企业的运行风险与成本,提升了企业生产管理水平及产品质量,提高了企业整体效益。     

基于LPC2294的无线监控系统设计

设计了一种基于ARM/GPRS的远程无线监控系统,该系统采用ARM7TDMI-S处理器,嵌入式实时操作系统μC/OS-Ⅱ作为系统运行平台,通过485总线将现场数据采集至监控终端,使用GPRS模块实现了数据监控终端与上位监控终端的远程实时通讯.     

新型REXA执行器在风机静叶调节系统中的应用

针对大庆石化催化裂化主轴流风机原电液伺服静叶调节系统存在的动力油系统泄漏严重、伺服马达拒动、伺服阀卡涩及静叶漂移等问题,对该系统进行了升级改造。将原电液执行器更换为REXA电液执行器,增加REXA控制单元。系统改造后,缩短了液压油管路,原系统的伺服阀卡涩、静叶漂移及渗油漏油等问题得到很好的解决。结果表明,REXA执行器具有响应速度快、定位精度高、抗干扰能力强等优点,同时节约了人工成本。     

钻井试验装置钻压伺服系统模型辨识研究

利用电液伺服控制理论和xPC技术建立钻井试验装置钻压伺服系统,系统采用阀控缸电液力伺服控制。为了获得钻压系统准确的数学模型,文章借助于xPC实时系统的半实物仿真环境和MATLAB系统辨识工具箱,对电液力伺服系统进行了系统模型辨识实验研究。通过改变工况以及设计控制器进行辨识模型的数字仿真和半物理仿真,验证了该辨识模型的准确性。该研究对钻压伺服系统建模及控制系统设计具有参考价值。     

全电动注塑机自动控制理论研究

研究了注塑机锁模机构伺服驱动器的技术,提出了一种基于DSP的全电动注塑机运动伺服控制器的设计思路。针对注塑工艺设计伺服电机控制器具有功能简化、成本降低等优点。本文通过对合模机构的伺服运动控制的研究,可以起到举一反三的效果,把伺服控制器的设计思想推广到射胶、熔胶等机构。伺服控制器的研究主要是针对交流永磁同步电机,也研究了廉价的无刷直流电机在全电动注塑机上的应用。     

基于浇包转角的自动倾转浇注控制系统设计

针对常见的倾转浇注过程中浇注设备浇注精度不足、自动化程度低等问题，设计自动浇注控制系统，并提出基于浇包转角的PLC控制策略。首先建立浇包在不同转角下浇注金属液体积与浇包转速的数学模型，然后设计倾转浇包PLC伺服控制系统，并通过触摸屏人机界面控制系统的启停与监测实时数据，实现了定速自动浇注。     

一种卫星天线伺服控制系统的设计

介绍应用于某卫星天线机构上的天线伺服控制系统。系统基于FPGA，将计算机给定的转向角度指令转换成脉冲，实现平稳地转动天线达到指定位置，同时，旋变模块将天线实际转动的角度信息反馈给天线伺服控制系统，实现天线跟踪指向运动等功能。     

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。