火石咀煤矿井下水泵房集中控制系统的应用

本文阐述了煤矿中央水泵房集中控制系统的功能、基本要求、设备及组成。该系统由工业计算机、组态软件、触摸屏、各种检测传感器组成。实现了矿井排水系统的智能化、自动化、网络化控制。使泵房实现了地面远程监控,大大减少了泵房操作人员数量,同时提高了该系统的安全性和可靠性。本文重点讨论了中央水泵房的自动控制设计过程、通信、模拟仿真等问题。     

阜新盆地阜新市区地热资源地质条件简析

阐述了阜新盆地阜新市区的地质、构造情况。并对该区地热资源地质条件进行了分析,初步确定了热储、盖层、导水和控热构造。详细的对地热流体的化学成分、有用组分以及有害成分进行了分析评价。提出了进一步研究、勘察、评价、开发利用该区地热资源的建议。     

民爆器材扩大出口工作会议在深圳召开

1986年3月下旬,中国北方工业公司在深圳召开了民爆器材扩大出口工作会议。国家物资总局、兵器部有关司局、有关生产单位、香港利达时公司及北方工业公司深圳分公司等单位参加了会议。会议学习了中央、国务院有关文件;回顾总结了民爆器材出口的基本成绩;分析了存在的问题;沟通了产、供、销、用等渠道。有关厂家还作了静态破碎剂碎石的现场表演。     

物联网应用系统研究

该文介绍了物联网应用系统的基本架构,对数据中心、传输通道、终端设备3个部分进行了阐述。首先,对数据中心的可选方案商、选型要点、技术指标限制、费用等进行了分析。其次,对传输通道的各项通信技术进行了简要对比和分析,阐明了各自的优缺点和选型思路。然后,对终端设备的多样性、实现架构、技术设计要点、关键器件选型、关键实现细节、认证标准等方面进行了阐述。最后,通过在售产品的应用解决方案实例发现各项技术方案都得到落实,并进行了远景展望。     

隐身涂料的研究进展与发展方向

综述了隐身涂料的研究进展。并简述了隐身涂料的主要种类,有雷达隐身涂料、红外隐身涂料、可见光隐身涂料、激光隐身涂料。对隐身涂料的原理、粘结剂、颜填料等进行了探讨。最后对隐身涂料的发展方向进行了探讨。     

真空感应CVI/CVD系统自动化控制技术

介绍了真空感应CVI／CVD系统结构、功能。针对真空感应系统干扰强的特点，分析了对该系统进行控制的要点。根据操作工艺设计了基于分布式、模块化控制解决方案。实现了被控量的在线实时测控。开发了真空感应系统专用控制软件，同时介绍了控制系统软件的主要功能。分析了PLC、智能模块、智能仪表与工业控制计算机的通讯机制，并给出了通讯的实现方法。     

浅谈阜新市区地热资源开发利用

本文阐述了阜新盆地阜新市区的地质、构造情况。并对该区地热资源地质条件进行了分析,初步确定了热储、盖层、导水和控热构造。详细的对地热流体的化学成分、有用组分以及有害成分进行了分析评价。提出了进一步勘探开发利用该区地热资源的方向和建议。     

电镀铂的研究

介绍了电镀铂的重要意义及国内外发展概况。评述了十二种典型的电镀铂工艺。对DNS镀铂工艺进行了深入研究。给出了镀液的配制方法、镀液中含铂量、pH值、镀液温度、电流密度等参数对镀层性能的影响。并研究了镀液稳定性、镀液使用寿命与调整方法、镀厚能力及镀层性质。     

石墨烯及其复合材料导热性能的研究现状

阐述了单层石墨烯、石墨烯带及石墨烯复合材料的导热性能。介绍了各种测试模型,综述了石墨烯的层数、纵横比、几何结构、边缘粗糙度、衬底耦合作用、温度等因素对其导热性能的影响。提出了石墨烯及其复合材料导热性能可深入研究的方面。     

澳大利亚棉花纤维品质分析

简单介绍了澳大利亚棉花种植及相关情况。详细分析了2001-2005年澳大利亚主要产棉区棉花纤维的长度、长度整齐度、短绒率、比强度、马克隆值、反射率和色特征级。对部分指标参照了同期的乌斯特国际水平值进行了分析。     

Relationship between mechanical properties and crystal structure in cocrystals and salt of paracetamol

Abstract

Objectives were to study mechanical properties of various solid forms of paracetamol and relate to their crystal structures. Paracetamol form I (PRA), its cocrystals with oxalic acid (PRA-OXA) and 4,4-bipyridine (PRA-BPY) and hydrochloride salt (PRA-HCL) were selected. Cocrystals and salt were scaled-up using rational crystallization methods. The resulting materials were subjected to different solid-state characterizations. The powders were sieved and 90–360?µm sieve fraction was considered. These powders were examined by scanning electron microscopy (SEM) and densities were determined. Tablets were made at applied pressures of 35–180?MPa under controlled conditions and the tablet height, diameter and hardness were measured. Tensile strength and porosity of the tablets were estimated using well known models. Crystal structures of these systems were visualized and slip planes were identified. Cocrystal and salt of PRA were physically pure. Sieved powders had comparable morphologies and particle size. The apparent and theoretical densities of powders were similar, but no clear trends were observed. The tensile strengths of these compacts were increased with increasing pressure whereas tabletability decreased in the order oxalic acid?>?PRA-HCL?≈?PRA-OXA?>?BPY?>?PRA-BPY. Tablet tensile strength decreases exponentially with increasing porosity with the exception of PRY-BPY and BPY. Slip plane prediction based on attachment energies may not be independently considered. However, it was possible to explain the improved mechanical properties of powders based on the crystal structure. Cocrystallization and salt formation have introduced structural features that are responsible for improved tableting properties of PRA.     

圆柱形金属橡胶结构的静态力学性能

对圆柱形金属橡胶结构做静态实验,运用最小二乘法对实验数据进行拟合,得到金属橡胶材料本构方程的各系数,将由实验得到的各系数代入本构方程式中,从而得到理论拟合迟滞回线,将理论拟合迟滞回线与试验迟滞数据进行对比,发现理论拟合迟滞回线与试验迟滞数据吻合较好,同时运用ANSYS有限元软件对金属橡胶结构进行有限元建模、定义边界条件及施加载荷,最后进行应力应变分析,得到应力应变分布图,发现分析结果与实验结果吻合。     

偶联改性纳米HAP/HDPE挤出复合生物材料的力学性能和微观结构

通过化学共沉淀-水热合成法制备纳米级羟基磷灰石(HAP),再用自制模具制备出偶联剂改性纳米HAP/高密度聚乙烯(HDPE)挤出复合材料.通过SEM观察以及力学性能测试,研究了偶联剂改性纳米HAP/HDPE复合材料的微观结构和力学性能.结果表明: 添加硅烷偶联剂后,HAP/HDPE复合材料的力学性能获得提高,偶联剂含量为2%(质量分数)时拉伸强度最高.而当HAP含量为20%(质量分数)时,复合材料的拉伸强度和抗弯强度最高.添加了偶联剂,HAP微粒表面与HDPE有较好的亲和性,断裂过程中应力诱发的塑性变形增加,裸露的HAP颗粒明显减少.通过口模挤出可以使得聚乙烯分子链在应力作用下伸直取向,大量平行于长轴且紧密排列的微纤维形成.     

Testing of explosive welding and welded joints. Wavy character of the process and joint quality

The basic defects occuring in explosive clad plates were properly systemized and the reasons of their formation were explained. Cases of cracks and delaminations in explosive clad plates were examined in this work. Various values of tensile stresses coming from loading and unloading waves were analysed, as they were the main reason of defects. The defects were connected with properties of welded materials in the joint area and beyond it. Some practical aspects of this process were shown as well.     

Analytical simulation of rib-web forging

The friction calibration curves were generalized using ALPID simulations of ring compression tests and were used to establish the friction factor associated in the workpiece-tool interface. ALPID simulations were carried out for different rib-web sections. The metal flow characteristics were closely watched and load requirements for these processes were established. The distribution of effective strain and strain rate and stress were established.     

Characteristics of carbon microspheres and study on its adsorption isotherms

In this paper a great deal of carbon microspheres with high purity, uniform diameter and good features were synthesized by CVD method, while acetylene and toluene were used as carbon sources. The obtained carbon microspheres were almost amorphous. The products were treated by microwave plasma and temperature vacuum heat treatments respectively, then the samples were analyzed and characterized by FESEM, XRD and HRTEM. The results showed that carbon microspheres were well graphitized while their features were undestroyed. Based on their adsorption isotherms of nitrogen, pore structures of carbon spheres were found to be changed greatly after graphitized treatments.     

有缺陷和无缺陷量子点内应变分布的比较与分析

阐述了量子点内能级结构与应变的关系,用ANSYS7．1计算了有缺陷和无缺陷两种情况下：InAs／GaAs量子点的应变分布,通过对计算结果的比较,讨论了两种情况下不同的应变分布对量子点电子结构影响的不同结果,指出有缺陷时量子点各能级的改变量都与无缺陷时不同,无缺陷时应变的作用只是使能级平行移动;有缺陷时,缺陷将使量子点内能级结构复杂化,有缺陷时发光波长和发光光谱都比无缺陷时复杂。     

Characterization of carbon nanotube-cdse hybrid nanomaterials

MWNT-CdSe hybrid nanomaterials were prepared with carboxylic acid-treated CdSe nanoparticles and amino-functionalized MWNTs. The hybridization of MWNT-CdSe nanomaterials was performed by the formation of covalent bond between MWNT and CdSe. Their covalent bond lengths were varied with changing the linking spacers. Amino-functionalized MWNTs were reacted with CdSe nanoparticles which were functionalized with carboxylic acid groups. Their detailed structures were characterized by FT-IR, XPS, and small angle X-ray scattering. Through small angle X-ray scattering experiments, it was found that the structures of CdSe nanoparticles were not regular, and their sizes were broadly distributed in solution. The longer amino-functionalized MWNTs were thermally decomposed at lower temperature. The photoluminescence (PL) of chemically-linked MWNT-CdSe hybrid nanomaterials were weaker than that of CdSe nanoparticles. In addition, their PL intensities more weakened on the MWNT-CdSe with the longer spacers.     

Growth and study of some gel grown group II single crystals of iodate

Single crystals of calcium iodate and barium iodate were grown by simple gel technique by single diffusion method. The optimum conditions were established by varying various parameters such as pH of gel solution, gel concentration, gel setting time, concentration of the reactants etc. Crystals having different morphologies and habits were obtained. Prismatic, dendritic crystals of barium iodate and prismatic, needle shaped, hopper crystals of calcium iodate were obtained. Some of them were transparent, some transluscent, and few others were opaque. Both the crystals were studied using XRD, FT-IR, and thermal analysis. The crystals were doped by iron impurity. The effect of doping was studied using IR spectroscopy and thermal analysis.     

多壁碳纳米管对鲤鱼各组织SOD酶活性的影响

应用浸浴法研究多壁碳纳米管（MWCNTs）对鲤鱼（cyprinl Jscarpioio）腮、肝、肾和脑中超氧化物歧化酶（SOD）的影响,结果显示：低浓度（0．1,lmg·L^-1）处理组暴露后3d,腮和肝中的SOD活性显著高于对照组（p〈0．01）,肾和脑中SOD活性与对照组无显著差异（p〉0．05）。随着暴露时间延长,各组活性降低,至9d,肝和肾中SOD活性显著低于对照组（p〈0．05）,腮和脑中SOD活性与对照组无显著差异（p〉0．05）。高浓度（10mg·L^-1）处理组,整个暴露期间,肝中SOD的活性显著低于对照组（p〈0．01）,脑中SOD的活性与对照组无显著差异（p〉0．05）,腮和肾中SOD活性在暴露后3d,与对照组无显著差异（p〉0．05）,暴露后6d、9d,活性显著低于对照组（p〈0．05）。提示：MWCNTs对鲤鱼各组织中SOD酶活性的影响有时间和浓度依赖性。