凝结式蒸汽干度测量方法与应用

依据能量守恒原理和凝结式蒸汽干度测量原理,研制了凝结式蒸汽干度测量装置,并对该装置进行了测量精度的定量分析,分析结果显示其干度测量精度可达到98％,并得出了提高该装置测量精度的内部测量部件的匹配模式,同时制定了该装置的现场安装方案,现场应用实验表明这一干度测量装置具有在线实时测量的实用性。     

测量技术在石油开采中的应用

测量技术的发展为各行各业提供了高度集成化和数字化的信息处理技术，对于石油勘探开采来说其难度日益提高，依靠常规手段已经不能达到对复杂地质条件下的高效开采，因此测量技术在石油开采中的应用就成为了帮助其提高准确性与效率的重要手段。通过分析测量技术在石油开采中的测前准备、精度分析与数据处理等方面的应用，给出了提高石油勘测开采作业精度的有效控制方法，具体介绍了测量技术在石油开采中的应用的发展情况。     

一种新的电容层析成像电极组合激励测量模式

电容层析成像图像重建为非线性不适定反问题,其敏感场分布不均匀,可获得的测量数据有限,中心处物体的成像效果不佳。增加电极数目,可获得更多的电容测量数据,减小其不定性,同时改善敏感场分布。但同时导致电容测量值变小,测量精度下降。在保证电容测量精度的前提下,提出了24电极组合式电容层析成像传感器结构,研究了两种激励测量方案,并与传统12电极电容层析成像传感器进行了对比分析,包括电容测量值的大小及其动态测量范围、灵敏场分布的均匀性以及不同流型下的重建图像。仿真结果表明,与12电极电容层析成像传感器相比,采用24电极组合式电容层析成像传感器,其电容测量值大,可较好地保证测量精度,其灵敏度分布更加均匀,对中心处物体的成像质量明显提高。     

数字滤波技术在聚合物熔体在线流变仪中的应用

根据聚合物熔体在线流变仪测量系统中自变量参数熔体压力在整个测量过程中的变化特点,研究了熔体压力测量精度对最终因变量熔体剪切黏度的影响。在实验测量和理论分析的基础上,选择适应系统变化特点的滤波算法对系统变化过程的压力进行数字滤波,实现提高最终测量参数熔体剪切黏度测量精度的目的。结果表明,通过递推平均滤波算法,可以有效提高聚合物熔体剪切黏度的测量精度。     

RTK测量原理及提高精度方法的研究

GPS测量较传统的测量方法而言,具有较多的测量优势,因此GPS测量技术在工程测量的工作中得到了广泛的应用。且相关的拓展技术也得到了迅速的发展,为此本文主要对RTK测量技术的主要内容进行相应的分析,并在其基础上,对RTK的测量原理以及提高精度的方法进行了细致的研究。     

数字图像颜色恒常性算法及应用

建立了BP神经网络颜色恒常性算法,对水质氯离子溶液颜色值进行了校正,以提高图像测量精度.实验结果表明：BP神经网络颜色恒常性算法实现了普通光源到标准光源的非线性映射,可以减小或消除电源及光源等因素对测量结果的影响,校正了颜色,提高了测量精度和灵敏度.     

地籍测量中GPS实时动态技术的应用分析

最近几年全球定位系统GPS的发展十分迅速,其应用也越来越广泛,其中在地籍测量中也广泛的应用了GPS技术,不但提高了工作的效率还大大的提高了测量的精度。本文主要很对GPS测量技术的优点以及在地籍测量中用于的优势进行探析,并且针对存在的一些问题给予解决的措施。     

煤矿井下巷道贯通测量精度分析及技术方法

本文主要分析了煤矿井下巷道贯通测量精度分析及技术方法的应用,重点介绍了煤矿井下巷道贯通测量精度分析的技术方法应用和测量的精度分析。煤矿井下巷道贯通测量精度分析技术的应用不仅能够克服现有煤矿井下巷道数据存在的缺失,而且对于提高工作效率和保障施工安全具有重要意义。通过对煤矿井下巷道贯通测量精度分析技术的探讨,改善煤矿井下巷道施工现状,为煤矿井下巷道工程安全、工程建设提供技术支持。     

基于TMOAA算法的陶瓷墙地砖尺寸在线测量

针对传统方法忽略陶瓷墙地砖圆角、毛边等问题造成的测量其对角线尺寸精度不高的现状,提出一种用TMOAA(Tuo's Max Of Acme Algorithm)算法对陶瓷墙地砖对角线尺寸进行在线测量的方法。该方法以渐进的方式准确定位陶瓷墙地砖四个顶角的位置,从而确定对角线位置并对其进行在线尺寸测量。同时,还提出对陶瓷墙地砖的厚度和边长进行在线测量的方法。实验表明,所用方法测量精度为±0.15 mm,可准确地得到陶瓷墙地砖的各项尺寸,有助于提高陶瓷墙地砖的生产精度。     

回转窑中心线快速测量法

对回转窑筒体中心实心测量传统作法的难点进行了描述,给出了解决测量难点的办法。利用该测量计算方法可大幅度缩短测量时间,提高测量精度。     

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.     

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.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.