锚网支护在综采工作面开切眼中的应用

介绍了平煤集团一矿在戊8— 310 40综合机械化采煤工作面开切眼实施煤巷锚网支护的基本情况。总结了经验 ,为同类条件下的锚网支护设计提供了依据。     

多处理器芯片体系结构研究

随着超大规模集成电路工艺和超级计算技术的发展，作者认为在单个芯片内集成多处理器系统将成为可能。本文详细讨论了多处理器芯片的分类和结构，着重阐述了同构型多处理器芯片的主要研究方向，并对同构型多处理器的可行性作出了分析。     

Cost Effective VLSI Architectures for Full-Search Block-Matching Motion Estimation Algorithm

In this paper, we present efficient VLSI architectures for full-search block-matching motion estimation (BMME) algorithm. Given a search range, we partition it into sub-search arrays called tiles. By fully exploiting data dependency within a tile, efficient VLSI architectures can be obtained. Using the proposed VLSI architectures, all the block-matchings in a tile can be processed in parallel. All the tiles within a search range can be processed serially or concurrently depending on various requirements. With the consideration of processing speed, hardware cost, and I/O bandwidth, the optimal tile size for a specific video application is analyzed. By partitioning a search range into tiles with appropriate size, flexible VLSI designs with different throughput can be obtained. In this way, cost effective VLSI designs for a wide range of video applications, from H.261 to HDTV, can be achieved.     

TNT-RDX混合废水处理的实验研究——生物-吸附法

介绍了在２５￣３５℃的温度下，用厌氧－兼氧－水生生物－吸附组合工艺处理ＴＮＴ和ＲＤＸ混合废水的方法，进行了日处理量为６０￣９００Ｌ的实验室放大实验。当ＴＮＴ和ＲＤＸ混合废水总浓度为４￣１２ｍｇ／Ｌ时，经过该工艺处理后可达到国家排放标准。其中厌氧－兼氧能去除废水中８０％以上的ＴＮＴ和ＲＤＸ，水生生物（水葫芦）对ＴＮＴ及ＲＤＸ也有一定的降解效果，最后用活性炭吸附可以实现深度处理。     

Distributed memory systems for simulating artificial neural networks

In executing tasks involving intelligent information processing, the human brain performs better than the digital computer. The human brain derives its power from a large number [O(10¹¹)] of neurons which are interconnected by a dense interconnection network [O(10⁵) connections per neuron]. Artificial neural network (ANN) paradigms adopt the structure of the brain to try to emulate the intelligent information processing methods of the brain. ANN techniques are being employed to solve problems in areas such as pattern recognition, and robotic processing. Simulation of ANNs involves implementation of large number of neurons and a massive interconnection network. In this paper, we discuss various simulation models of ANNs and their implementation on distributed memory systems. Our investigations reveal that communication-efficient networks of distributed memory systems perform better than other topologies in implementing ANNs.     

Alkali-metal Na Adsorption and Promoted Oxidation on Si(100)2×1 Surface

The alkali-metal Na adsorption on Si(100)2×1 surface and its promoted oxidation and Si oxidegrowth have been investigated by means of thermal desorption,work function,Auger electronspectroscopy and photoemission electron spectroscopy.The experimental data showed that therewas a new state,interface electron state,near the Fermi level after the deposition of Na atoms.It wasfound that the presence of Na always caused an increase of the oxygen initial uptake whereas thepromotion of Si oxide growth was observed only at the coverage of Na greater than 0.5 ML.A newmechanism of Na-promoted Si oxide growth is suggested in this paper.     

一种独立于被管系统的网络性能管理系统

本文提出了一种在广播信道上基于倾听机制的独立网络性能管理系统。这种系统适用于用物理广播信道连接，但存在多种协议体系结构的网络系统，例如ＣＩＭＳ网络。     

面向对象系统中的特性表机制与复合对象

本文主要讨论特性表机制与复合对象的概念、功能及实现．在基于知识的面向对象系统中引入特性表机制与复合对象概念的目的在于增强系统的知识表达能力．文中提出的特性表机制包括了三种类型的特性说明表：类说明特性表、继承关系特性表和变量特性说明表．复合对象在系统中是通过引入一个称为“影子类”的新概念来构造和实现的．     

烃氧化产物皂化后活性组分在油、水相的分配

用强酸酸化后测定乙醚抽出物酸量和酯量、溴甲酚绿两相滴定测定羧酸盐等方法研究了烃氧化产物皂化后活性组分在油、水相的分配。结果表明,在现行的用NaOH皂化烃氧化产物以制备水溶性石油磺酸盐的过程中有相当多的活性组分分配到油相;在水相和油相中均有大量羧酸酯存在,羧酸酯量远远超过羧酸盐量。     

Effect of Bi and Sr concentrations on the formation of the 2223 phase in Bi-Pb-Sb-Sr-Ca-Cu-O materials, obtained under different conditions of thermal treatment

The superconducting properties and the phase and chemical composition of Bi _x Pb_0.3Sb_0.1Sr _y Ca₂Cu₃O_z (x=1.5, 1.6, and 1.7;y=1.9, 2.0, and 2.1) materials synthesized by one-step and multistep thermal treatments have been investigated. The multistep annealing between 825–875°C promotes the 2223 phase. The change of Bi concentration has little effect on the 2223 phase formation, regardless of the kind of thermal treatment used, but increasing the Sr concentration (y> 2) strongly inhibits this phase. It has also been established that the loss of Pb after synthesis depends on the initial Bi concentration. The loss of Pb decreases when the initial Bi content is lower.