露天矿卡车实时监控调度系统的研制

介绍了一个露天矿卡车实时监控调度系统的研制情况。研制的内容主要包括了系统功能及总体设计、调度数据库设计、车流规划软件设计、实时调度软件设计，着重介绍了系统作业方式设计。该系统成功地进行了室内和现场试验，取得了满意的结果。系统的应用可以减少铲、车的相互等待时间，提高生产效率。     

云浮硫铁矿采矿卡车调度系统计算机模拟的研究

本文针对云浮硫铁矿特点,建立了计算机模拟模型,着重研究多采区露天矿卡车调度原则及方法。模型中综合采用优先率法及饱和度准则的调度方案。模拟结果表明,采用该调度方案较之固定配车,可明显提高设备效率及系统产量。     

露天矿卡车调度系统数据处理技术的研究

利用数据仓库DW(Data Warehouse)、联机分析处理OLAP(On—Line Analytical Processing)、数据挖掘DM(Data Mining)等技术对露天矿卡车调度系统存有的大量数据,提出分析处理的思路和方法。     

露天矿卡车调度模糊决策系统

在露天矿开采中利用卡车运输的开拓方案应用越来越广泛,但是在大中型矿山中卡车数量多、车流密度大、车型复杂,实际生产中必须合理地进行调配,才能保证生产的正常运行并充分发挥出卡车的效率。本文针对目前普遍采用的卡车调度决策模型所存在的不足进行研究,提出了建立模糊决策模型的卡车调度决策方法,并对建模方法和应用效果进行了详细论述。     

矿业之窗

本文主要研究露天矿汽车调度系统中的调度原则和多个调度决策点相互干扰问题,利用最短事件步长法建立了多调度决策点露天矿汽车调度系统的模拟模型,通过求解序数矩阵使多个调度决策点之间的相互干扰问题得到妥善解决。文中还以金堆城钼矿为例,讨论分析了几个汽车调度参数,对比分析了几种调度方案的生产指标。 (何光吉摘)露天采场内破碎—胶带运输系统可减少运输费用,H.奥尔索夫,《国外金属矿采矿》,1987,№4,21～24。 本文论述了露天采场内使用移动式破碎装置—胶带运输机系统较之固定式破碎装置—重型汽车运输系统的优缺点,比较了二者的资金支出和生产费用,并对各项费用因素作了说明。由于每个露天矿或采石场的条件不同,为了寻求最适宜和最经济的输送物料方法,必须分别地进行评价和研究。由于汽车运输费用高,许多露天矿趋向采用移动式破碎装置和连续胶带机这种较经济的运输系统。     

露天矿数据仓库的研究

分析了露天矿数据仓库的应用现状,讨论了露天矿数据仓库的建设方式,并以露天矿卡车班产量和设备加油量这两个主题为例建立了相应的数据集市.     

计算机控制卡车调度系统的效益分析

利用研制的实时调度模型的模拟结果,分析了计算机控制卡车调度系统在齐大山铁矿的应用效益及其可行性。     

霍林河露天矿卡车调度模拟研究

本文介绍霍林河露天煤矿积极筹划安装计算机卡车调度系统。对各种作业时间进行了实测和收集,用线性规划对车流进行优化分配,以MSD(最小饱和度)和MSDTC(兼顾卡车运行周期的最小饱和度)作为调度准则,并与固定配车的结果相比较。     

C-DISPATCHO的开发

本文报道了露天矿铁路运输计算机实时调度系统C—DISPATCHO的开发情况,着重阐述了CDIDPATCHO的控制操作和子系统的作用。     

《化工矿山技术》一九九三年总目录

囊名 期·页 矿山开采 露天矿作业台阶可靠度分析…………………………(1.1) 后退式堆碴拦碴坝在排土场的应用…………………(1.5) 近水平缓倾斜露天矿开采程序的探讨……………(1.10) 松软矿体有底柱高分段崩落法的改进方案………(1.14) 灵湖金矿回采过程的岩体稳定性研究……………(1.17) 自然崩落法矿体崩落过程的数值模拟……………(1.21) 王集磷矿尾砂特性及其充填性研究………………(1.53);。确定边坡岩体强度的数学模型一随机模拟法………(2.1) 计算机控制卡车调度系统的效益分析………………(2.6) 带分层假顶的无底柱分段自然崩落法…     

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.