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The coal tar was qualitative and quantitative anMyzed by gas chromatography (GC) method. 74 components were identified exactly by gas chromatographY-mass spectrometry (GC-MS). 31 components (37%) were quantitatively analyzed by gas chromatography-flame ionization detector (GC-FID). The linearity, accuracy, precision, limit of detection (LOD) and limit of quantitative (LOQ) determination were inspected. The scope of quantitative analysis by CC was discussed. The experimental results of thermogravimetric analysis (TGA) proved that GC quantitative analysis of the coal tar was reliable. 相似文献
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电脑系统的安装不但繁琐而且耗时,因为每台计算机配置不同,所以使ghost镜像还原系统失去了其应有的作用,该文介绍创建系统封装包的方法,能够使系统安装更加轻松自如。 相似文献
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《赤峰学院学报(自然科学版)》2016,(8)
本文设计了一种尿素拆包装置,该装置通过两个安装在尿素存储仓口内的可旋转式电锯同时相向运动对固定于漏斗定位环内的尿素袋两侧进行切割,尿素靠重力作用完成与袋的完全分离.此装置代替了目前的人工拆包,避免了尿素对人体的伤害,保障了工人的身体健康,提高了生产效率. 相似文献
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《十堰职业技术学院学报》2019,(5):71-74
以ABB公司六轴机器人IRB1410为背景,详细介绍了包括机器人工作站I/O配置、参数设置等,该机器人配备了松下YD-350GL4弧焊电源,并安装了弧焊焊接相关的ArcWare弧焊包、TorchServices清枪系统和PathRecovery路径恢复系统,让机器人的工作更加智能化和自动化。 相似文献
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自动控制原理课程常常需要运用软件绘制图形,而MATLAB又存在价格昂贵、关键代码被隐藏和可移植性不高等诸多不便.基于此,给出了 PYTHON软件在自动控制原理课程仿真中的应用和一些具体实例的仿真程序代码.首先使用ANACONDA开源软件,安装第三方开源包SLYCOT和CONTROL以搭建环境,然后基于PYTHON语言环... 相似文献
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王丹玲 《牡丹江教育学院学报》2006,(2):102-103
数据的安全性是数据库管理的一项重要工作。本文论述了SQL Server数据库系统的安全性,以及保证安全性所应该采取的验证方法选择、安装最新的软件服务包、使sa密码具备一定的强度、用防火墙禁用SQL Server端口等安全策略。 相似文献
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对创建网上课程的单机运行程序、外壳程序及安装/卸载程序作了详细的介绍,给出了使用Netbox对网站进行打包、Authorware中使用浏览器控件以及创建自动运行网站服务器的技术与方法,从而解决了在局域网内或单机上运行网上课程的目的。 相似文献
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INTRODUCTION Coking wastewater is generated in the produc- tion of coke, coal gas, tar and other coke by-products The coking wastewater includes inorganic pollutants such as ammonia, cyanogen, sulfocyan, heterocycle compounds and polycyclic aromatic compounds such as phenol, oils, naphthalene, pyridine, quinoline and anthracites, which are difficult to biodegradation under aerobic conditions (Ganczarczyk, 1972). Dis- charge of coking wastewater to the environment may cause severe contamin… 相似文献
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杨旭明 《中小学信息技术教育》2004,(12):61-62
目前,我校通过光纤专用线路,以局域网方式接入 Internet,校园网络用户对Internet 和教育城域网的所有访问均通过代理服务器完成。在代理服务器上安装了3 块网卡,两块网卡采用合法I P 地址,接入 Internet 和城域网; 另一块网卡则采用私有 IP地址,通过代理服务器实现内部校园网与Internet、教育城域网的连接,动态包过滤和访问管制等功能代理服务器安装了 W i n d o w s 2 0 0 0 S e r v e r 和Winroute。 一、 网络的基本情况 我校目前连上Internet 的计算机总数达到 300台左右。我们根据不同的使用需要,将不同部门、不同机房… 相似文献
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小波包理论是一般小波理论的扩展,在实际应用中小波包变换比小波变换应用更广,应用效果也比较好,给出了小波包理论和常用的小波包变换,探讨了每个小波包是否存在一个最优小波包基。 相似文献
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Fluidized-bed pyrolysis of waste bamboo 总被引:1,自引:0,他引:1
XIAO Gang NI Ming-jiang HUANG He CHI Yong XIAO Rui ZHONG Zhao-ping CEN Ke-fa 《浙江大学学报(A卷英文版)》2007,8(9):1495-1499
Bamboo was a popular material substituting for wood,especially for one-off commodity in China. In order to recover energy and materials from waste bamboo,the basic characteristics of bamboo pyrolysis were studied by a thermogravimetric analyzer. It implied that the reaction began at 190~210 °C,and the percentage of solid product deceased from about 25% to 17% when temperature ranged from 400 °C to 700 °C. A lab-scale fluidized-bed furnace was setup to research the detailed properties of gaseous,liquid and solid products respectively. When temperature increased from 400 °C to 700 °C,the mass percent of solid product decreased from 27% to 17% approximately,while that of syngas rose up from 19% to 35%. When temperature was about 500°C,the percentage of tar reached the top,about 31%. The mass balance of these experiments was about 93%~95%. It indicated that three reactions involved in the process: pyrolysis of exterior bamboo,pyrolysis of interior bamboo and secondary pyrolysis of heavy tar. 相似文献
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By coupling the heat transfer equation with semi-global chemical reaction kinetic equations, a onedimensional, unsteady mathematical model is developed to describe the pyrolysis of single biomass pellet in the pyrolysis zone of downdraft gasifier. The simulation results in inert atmosphere and pyrolysis zone agree well with the published experimental results. The pyrolysis of biomass pellets in pyrolysis zone is investigated, and the results show that the estimated convective heat transfer coefficient and emissivity coefficient are suitable. The mean pyrolysis time is 15.22%, shorter than that in inert atmosphere, and the pellet pyrolysis process in pyrolysis zone belongs to fast pyrolysis. Among the pyrolysis products, tar yield is the most, gas the second, and char the least. During pyrolysis, the temperature change near the center is contrary to that near the surface. Pyrolysis gradually moves inwards layer by layer. With the increase of pyrolysis temperature and pellet diameter, the total pyrolysis time, tar yield, char yield and gas yield change in different ways. The height of pyrolysis zone is calculated to be 1.51—3.51 times of the characteristic pellet diameter. 相似文献
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王利青 《忻州师范学院学报》2013,29(2)
文章首先介绍了“众包”产生的时代背景和定义,然后从各个层面深入阐述了“众包”与其它传统经营模式相比较在诸多方面具有的优势特点,同时有效结合了高校图书馆的实际情况,对高校图书馆引入众包理念的必要性和可行性进行了具体详细分析,探讨了众包策略、高校图书馆与服务业之间存在的种种关系,得出了在高校图书馆引入众包理念的积极意义,引出了高校图书馆实施众包策略的具体措施和方法,为高校图书馆创新服务开拓更多的思路和途径. 相似文献