节能环保在建筑给水排水工程中的应用浅述

随着社会污染的情况越来越严重，能源供应越来越紧张，节能、环保越来越引起人们的重视。在现代建筑设计中，节能、环保技术的运用越来越引起国家的重视，并因此出台了一系列的法规，随着技术的发展，运用在环保节能的技术会越来越成熟。     

线锯切割技术的应用与发展

随着电子工业的飞速发展,晶片的应用越来越广泛,晶片加工技术也越来越受到重视,其中晶片切割是制约后续工序中成品率高低的重要工序.文章概述了半导体材料切割技术现状,介绍了线锯切割的技术原理及其切割机理,并提出了线锯切割技术的发展趋势.     

电子信息工程领域计算机网络技术的应用研究

电子信息工程领域中越来越多的应用到计算机网络技术,对计算机网络技术的依赖越来越强。本文对计算机网络技术在电子信息工程领域中的应用情况进行了分析探讨。     

刍议注浆技术在房建工程中的应用

随着时代的发展和科学技术的不断进步,房建工程如雨后春笋般的拔地而起,越来越多的房建工程使得人们对其要求越来越高,而注浆技术施工因具有噪音低和振动小等优势而广泛被人们接受,注浆技术在房建工程中的应用越来越普及。本文主要阐述了房建工程中应用注浆施工技术的意义,探讨了注浆施工技术在房建工程中的应用,最后提出了解决注浆施工技术在房建工程中问题的一些措施。     

抗震技术在房屋结构设计中的应用

高层建筑随着社会的进步、经济的发展变得越来越多、越来越普遍,所以房屋结构设计中对抗震技术的应用逐渐成为建筑的设计的重点。如今,国家对于房屋施工技术也有了越来越高的要求,抗震技术是一个高科技技术。该文对在房屋结构设计中抗震技术的应用的必要性以及原理进行了分析,阐述了在房屋结构设计中如何应用抗震技术,又提出了抗震技术的应用创新,希望能够对我国抗震技术在房屋结构设计中应用的发展以及进步起到促进作用。     

浅析智能控制技术在工程机械控制中的应用

随着我国基础建设规模越来越大,难度也越来越高,对工程机械的性能和操作控制也造成了不小的压力,随着智能控制技术的发展和进步,智能控制技术成为了应对工程机械越来越高的操作需求的有效方法。与传统人工操控工程机械的方式相比,应用智能控制技术后工程机械向着更高效、更安全、更精准的方向发展。本文对智能控制技术在工程机械控制中的应用进行了简要分析,希望能促进智能控制技术在工程机械控制方面的技术进步。     

PDMS在化工管道设计中的应用

随着当代我国科技的高速发展,业内人士对于科研工作提出了越来越高的要求,为了促使工业设计工作的科学性及准确性得到提升,在大型工业设计工作之中,传统二维技术已经基本被淘汰,三维设计技术应用范围则越来越大。当前PDMS技术已经处于较为成熟的状态,并且在我国的化工管道设计工作中得到了越来越多的应用。为了促使PDMS技术在化工管道设计工作中得到越来越高效的应用,对PDMS在化工管道设计中的应用策略进行分析。     

变频电气控制柜的技术创新与节能措施

随着我国经济的高速发展,对石油资源的需要量越来越大,各种油田采油工程也越来越多,对相关技术的应用要求也不断提高,对各种新技术的应用越来越多。在科技不断发展的今天,自动化成为工业发展的重要趋势,尤其是变频技术的使用,进一步提高了对电机的使用效果,降低了电动机的能耗。     

试析图像识别技术在人工智能中的应用

进入新世纪后,国家科学技术获得快速发展,信息化程度越来越高,人工智能技术应用的程度也越来越广泛,其中人工智能中的图像识别技术也更加重要,应用范围不断扩大,因此探讨人工智能中的图像识别技术就显得极为重要,具有较强的现实意义。笔者在本文中首先研究了图像识别技术的原理及其识别模式,然后探讨了图像识别技术工作的过程,探讨了当前几种应用比较广泛的图像识别技术。     

大数据下的机器学习算法综述——以AlphaGO为例

大数据时代来临,数据的体量越来越庞大,种类也越来越繁多,机器学习技术也因此得到了高度的重视和空前的发展。自1956年以来,人工智能技术经过60余年的发展又走进了人们的视野,以AlphaGo为代表的应用了各种先进机器学习技术的人工智能正发挥着越来越重要的作用,深度学习(多层神经网络)技术成为机器学习的技术核心。目前整个国家乃至整个世界都在大力发展新的人工智能技术,大数据环境下的机器学习技术虽然有望使人类发展迈上新的台阶,但仍然存在许多不足之处等待改进。国家应投入更多的资源大力支持人工智能技术的发展,让其加速生产力和科技水平的飞跃,构建更美好的社会。     

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。