综采工作面自动化控制系统在煤矿的应用刍议

就目前煤矿开采工作而言，自动化技术让综采工作面减少了人员消耗，降低了工作成本，让煤矿开采实现了初步高效化。在自动化控制系统作用下，相关机械设备以及采煤工艺也在同步提升，井下作业不再完全依赖于手工操作，因此煤矿开采安全系数极大提升。本文基于这一情况，简单阐述了自动化控制系统发展重要性，分析了这一技术在我国发展状况，研究了自动化系统功能的应用，并在此基础上提出了几点控制系统发展方向。旨在深化自动化控制系统在我国煤矿开采中的应用程度，提升煤矿综采工作面工作效率。     

小型电厂循环水泵汽蚀的原因及解决措施

在电厂中，循环水泵是非常重要的设备，在设计和选型中都做了认真的考虑，避免泵发生汽蚀，但是在使用过程中，由于种种原因，都不同程度地存在汽蚀，造成设备损坏，给生产带来了很大的影响。本文从多角度分析了小型电厂循环水泵汽蚀的原因，并提出了解决措施。     

在复合肥厂电气设备维护保养和故障分析及对策

本文介绍了在恶劣环境中，高粉尘，高温高湿，物料易潮解，易腐蚀，易导电等。尤其是在皮带多，振动筛子多等转动设备多的化工企业，在这种情况下，如何去快速分析事故，以及解决方案和对策，为在化工企业工作的同志提供了借鉴依据。     

喷浆处理密闭墙漏风应用与探讨

建筑在动压巷道中密闭墙由于受巷道压力影响，密闭墙顶部及四周经常出现裂隙，造成漏风。采用喷浆工艺，在密闭墙墙体顶部及四周喷射混凝土后，堵塞了裂隙，增强了密闭墙抗压能力，在避免了漏风，提高防火抗灾能力方面取得了十分显著效果。     

包钢稀土提出打造世界级稀土企业

日前，包钢稀土提出，要加快一体化运作，扩大生产规模，加快稀土产业化步伐，大力实施品牌战略，努力打造世界级稀土企业。近年来，包钢稀土在源头控制上取得了突出成效；在产业重组、低成本扩张方面取得了突出成果；在体制创新上取得了突出进步；在经济总量和发展质量上得到了突出改善。     

升级你的销售策略

案例： 龚裕凯，在这位年轻人身上，可以看出温州企业家的魄力和艰韧的精神，他早早地进入社会，在北京做印刷，赚了第一桶金。去年10月份国庆期间，在北京花了一周不到的时间便看中了中国联通一项“11698”全国性客服电话项目，投资了几十万，与中国联通签约成为11698客服电话浙江大区的总代理，怀着满腔热血，回到浙江杭州创办了杭州欧浩信息技术有限公司。     

浅谈提高公路桥梁工程施工技术的措施

在施工方面，桥梁的建设施工存在一定难度，不仅如此，在施工时，由于施工人员素质低，且施工环境较差，导致了施工上的困难，并且影响了质量的控制。文章分析了桥梁工程存在技术质量问题的原因，提出了一些控制措施。     

长期承诺源于充分信心 专访颇尔生命科学部全球总裁Yves Baratelli先生

2013年10月15日，在进入中国市场20周年之际，颇尔公司在上海成立卓越中心，再次拓展在中国的业务能力，并坚信这是颇尔在中国发展的又一里程碑。此次卓越中心在沪成立，进一步扩展了颇尔的服务能力，彰显了公司对于中国市场的长期承诺，并表现出了对中国市场的充分信心。恰逢此机会，本刊记者对颇尔生命科学部全球总裁YvesBaratelli先生进行了专访，YvesBaratelli先生对中国生物制药领域的现状及发展趋势进行了深入阐述，并概述了颇尔公司的未来发展。     

对建筑施工技术现状及发展的分析

我国的科学新技术在近几年来发展速度与速度越来越快，在建筑领域的应用越来越广泛，我国的建筑施工技术也有了很大的发展，在许多方面都取得了重大的突破，甚至在某些领域已经接近了国际领先水平。建筑施工技术水平的高低对建筑工程的施工质量有着直接的影响，本文简单对建筑施工技术进行了分析，介绍了我国相关建筑施工技术的研究现状，以及阐述了建筑施工技术未来的发展方向。     

网络病毒行为模式分析

计算机网络在为人类造福的同时，也为病毒的传播提供了便利。在网络环境下，病毒传播的范围扩大了，速度大大加快，网络已成为近年来病毒传播的主要途径。针对病毒在网络上传播的新特点，分析了网络环境下病毒传播的主要模式，包括E-mail传播、主动扫描传播、通过服务器传播等，介绍了业界的一些对策，并给出了一般用户有针对性的应对措施。     

光学薄膜的激光诱导损伤与材料带隙的关系

采用多光子吸收电离模型讨论了光学薄膜的激光诱导损伤与其材料带隙的关系,报实际光学薄膜存在大量的非化学计量比化合物缺陷时,损伤阈值的变化,给出了光汪膜的损伤阈民其材料带隙的关系曲线,理论上解释了实际光学薄膜较理想光学薄膜的损伤阈值的主要原因可能是实际光学薄膜中存在大量的非化学计量比化合物缺陷。     

Analysis of long-term internal stress and film structure of SiO2 optical thin films

Recently, the demand for durability of optical thin films, which have long been used, has been growing as the performance of optical components improves. The stress of a film is an important parameter that is related to its adhesion. The electron beam (EB) and ion-assisted deposition (IAD) methods are widely used to fabricate optical thin films. However, there are few reports on long-term internal stress, despite the importance of this issue. Here we discuss the time dependence of the stress of SiO2 optical thin films in terms of optical characteristics in the infrared region. It was found that SiO2 thin films prepared by the EB and IAD methods exhibited compression stress. The Si-OH molecular bond was observed at around 930?cm(-1) in the Fourier transform infrared spectroscopy spectrum of the sample prepared by the EB method, which exhibited a large change in internal stress after an elapsed time. It is considered that this change in bonding was related to the decrease in the stress of the films.     

光学薄膜及其发展现状

介绍了传统光学薄膜的原理,并对反光膜、增透膜、纳米光学薄膜等传统光学薄膜的研究现状及应用情况,以及几种新型光学薄膜如高强度激光器、金刚石及类金刚石膜、软X射线多层膜、光电通信用光学薄膜的研究现状及应用进行了详细分析;最后对光学薄膜的发展前景进行了展望。     

A comparison of the optical properties of glass and of evaporated amorphous thin films of BaO-TeO2

Two series of glass and thin film specimens of BaO-TeO₂ were prepared. The optical absorption edges and infrared absorption spectra were investigated. It was found that the fundamental absorption edge is a function of BaO content in both kinds of films and that the absorption is due to indirect electronic transitions. The values of optical gap for blown films were greater than those of thin evaporated films, but the widths of the band tails were greater for the evaporated thin films, which were expected to be more disordered than the thin blown glass films.     

Rh:BaTiO3 thin films with large nonlinear optical properties

We report the fabrication and the nonlinear optical properties of Rh-doped BaTiO3 thin films. The films were deposited on SrTiO3 (100) substrates by pulsed-laser deposition. The deposited Rh:BaTiO3 thin films were single phase and c-axis orientation investigated by x-ray diffraction. The films exhibited large nonlinear optical effects, which were determined using Z-scan technique at a wavelength of 532 nm with a laser duration of 10 ns. The real and imaginary parts of the third-order nonlinear susceptibility chi (3) were 5.71 x 10(-7) esu and 9.59 x 10(-8) esu, respectively. The value of Re chi (3) of Rh:BaTiO3 films is much larger than those of several representative nonlinear optical thin films. The results show that Rh:BaTiO3 thin films have great potential applications for nonlinear optical devices.     

Optical characterization of organic material bromoindium phthalocyanine thin films grown by electron beam evaporation

This paper presents the optical properties of organic material bromoindium phthalocyanine (BrInPc) thin films grown by electron beam evaporation technique. The paper describes the optical characteristics of BrInPc thin films, which have been determined using spectrophotometric measurements of the absorbance, transmittance and reflectance at normal incident of light in the spectral range 300–1,100 nm. The optical band gap energy and type of the electronic transition have been determined by analysis of spectral behavior of absorption coefficient, which reveals the probability of both direct and indirect transitions. Other optical constants, such as refractive index, extinction coefficient, complex dielectric constant and optical conductivity of thin films have been evaluated. Moreover, the width of band tails of localized states (Urbach energy), steepness parameter and width of the defect states have been determined by studying the absorption coefficient spectra just below the fundamental absorption edge.     

Bi3.45Eu0.55Ti3O12铁电薄膜的光学性能

采用化学溶液沉积法在石英衬底上制备了Bi3.45Eu0.55Ti3O12(BEuT)铁电薄膜,研究了BEuT薄膜的结构和光学性能。XRD测试结果表明,BEuT薄膜皆形成铋层状钙钛矿型结构,其晶粒尺寸随着退火温度的提高而增加。薄膜的光学透过率曲线显示,在大于500nm的波段BEuT的透过率比较高,而其禁带宽度大约为3.61eV。BEuT薄膜的发光强度随着退火温度的提高,先是增强后减弱,在700℃时达到最大。这与薄膜的结晶状况有关。     

Development of thickness measurement program for transparent conducting oxide thin films

The gallium doped zinc oxide has been one of the candidates for the transparent conducting oxide thin film electrode. It is not suitable to use a conventional light interference method to measure the thickness of the gallium doped zinc oxide thin film because the refractive index and extinction coefficient of the thin film is unknown during the optimization of the deposition conditions. In this paper, we report on the details of the film thickness program which uses the measured optical and electric properties and relationship between the plasma frequency and the optical constant of the film. The obtained film thickness of the prepared gallium doped zinc oxide thin film using the program was comparable with thicknesses measured by a cross-sectional analysis of the atomic force microscopy and the surface profiler. Moreover, the optical constant of refractive index and extinction coefficient of the film could also be estimated.     

Optical Properties of Ca_(0.25)Ba_(0.75)Nb_2O_6 Thin Films Prepared by Spinning Coating

Ca0.25Ba0.75Nb2O6 (CBN25) thin film was prepared on quartz substrate by spinning coating and the optical properties were investigated by a Hitachi U-3410 spectrophotometer and a Metricon 2010 prism coupler. The optical band gap, thickness and refractive index at 632.8 nm of the CBN25 thin film were determined to be 3.65 eV, 529 nm and 2.2258, respectively. The dispersion of the refractive index fitted to Sellmeier relation well and optical waves could be guided into the thin film, which implied that CBN25 thin films were promising for integrated optics and optically active devices.     

The inverse problem of the phenomenological theory of the optical properties of thin films

For thin metal films the solution of the inverse problem of the phenomenological theory of the optical properties of thin films is incorrect when the ratio of the film thickness to the incident light wavelength becomes less than 0.05 because the set of equations describing the relation between the measured optical characteristics and the optical constants of the film is virtually a set of linear equations with determinant equal to zero. For this reason the usual methods of solving the inverse problem give ambiguous solutions (optical constants) which are unstable to small errors in the measured optical characteristics. If the method of continuous differential descent is used as the regularization method for solution of this inverse problem unambiguous and stable solutions can be obtained.