关于土木工程Revit软件族的二次开发研究

在Revit API中,提供了一系列的类和方法来管理族文档。使用函数Family Manager、Family Type、Family Parameter、Family Item Factory、Family Element Visibility等可以实现族类型和族参数的管理,以及几何图元及其可见性的管理。     

应用WIN32 API实现串行口的数据通信

介绍了在Windows95操作系统下调用WIN32API函数实现计算机串口与外部设备的数据通信的方法 ,并且给出在Delphi开发工具下的开发实例     

注射成型智能监控系统的研究

提出了用于多台注塑机智能控制的群控系统方案,用一台PC机作为上位机并用其串行通讯口与下位机(多台注塑机)通讯控制注塑机,从而实现了主机智能监控从机的功能。利用MFC、数据库技术和Visual C 的通信API函数实现PC机人机交互界面和串口通信。详细介绍了该系统的基本组成及设计时的几项关键技术。     

Visual FoxPro应用程序剪切BMP图像的方法

介绍了在Visual FoxPro(简称VFP)应用程序中,不用Windows API函数、VFP外部应用程序接口库foxtools.fll、中间件,实现剪切BMP位图的处理方法,并给出了源代码示例。     

浅谈利用EXCEL函数提高油田统计工作的效率

目前EXCEL办公软件已经在中国得到广泛应用,如何高效利用EXCEL的函数功能实现高效统计,即是本文研究的主要内容。EXCEL中的函数是一些预定义的公式,它们使用一些称为参数的特定数值按特定的顺序或结构进行计算。将这些函数功能应用到油田各种统计工作,能大大提高工作效率。     

供应直通车

API标准动态1.API公告100-3《社区参与的指导方针）第1版已于2014年7月出版。该公告是API最新推出的针对水力压裂领域社区关系的推荐操作做法。其中主要概述了在压裂作业过程中,当地社区和其他关键利益相关者对运营商的期待,运营商怎样致力于通过区域作业来帮助社区实现积极和可持续的受益。2.API 17W《水下应急封井装置推荐作法》第1版已于2014年8月出版。该标准为水下应急封井的设计、制造和使用提供推荐操作做法。     

51单片机和PC机串行通信系统设计

介绍51系列单片机和PC机进行串口通信硬件电路的设计原理及通信软件的设计原理和方法,并给出硬件原理图及通信软件程序。重点介绍在VC 环境下如何通过W indows API通信函数实现对串口的操作。     

基于Solidworks和VC6．0的翅片管换热器的二次开发

使用Solidworks作为二次开发的三维设计平台,通过VC6．0程序设计软件和Solidworks的API编程接口,来实现翅片管换热器的自动成图。通过在操作界面数据的输入,能够自动的实现换热器的自动绘图,提高化工换热器设计的工作效率。     

管线管新标准-ISO3183出版

新的管线管国际标准ISO3183《石油天然气工业——管道输送系统用钢管》已于2007年出版,代替90年代分为三个部分先后出版的ISO标准。新标准是由ISO和API的工作组联合制定的,他们成功地将多数的ISO要求和API要求协调一致。API已经采用了ISO3183,并且于2007年10月1日将其作为第44版的APISpec5L《管线管规范》出版。API版本中包含了两个额外的附录,一个解决地区性偏差问题,另一个介绍API专有的会标使用制度。     

选煤厂三维设计的通用基础研究

介绍了三维软件底层API的功能性质以及在二次开发技术中的作用;利用VBA编写的宏命令对软件草图、模型等进行控制,以实现具体的功能;结合数据库知识,论述了与软件相关的插件基本编写方法与应用;分析了三维软件与Office Excel 2003的关联性及交互操作。     

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。