图书馆开架借阅管理及流通馆员素质要求

图书馆服务的主要方式是开架借阅,其优越性是闭架借阅难以比拟的.开架借阅为读者带来诸多便利,但是在实施中却存在一些问题.在改革创新、不断完善开架借阅的前提下,论述如何更好地为读者服务,并相应地提出开架借阅流通馆员的职业形象及素质要求.     

浅析循环流化床锅炉的脱硫脱硝

本文介绍了循环流化床锅炉SO2、NOx产生过程及其特性,着重阐述循环流化床锅炉脱硫脱硝机理以及影响SO2、NOx排放浓度的各种因素,较合理的提出了降低循环流化床锅炉SO2、NOx排放浓度方法、措施等,对循环流化床的运行管理有一定的指导作用。     

袋式除尘器在循环流化床工程中的应用

结合循环流化床工程的实际情况,从综合技术经济的角度就袋式除尘器和电除尘器选型进行比较,并提出了推荐性意见。     

近代的冰雪运动工具——冰床

冰床即现代所谓的雪橇,在宋代的沧、霸州等与北方少数民族接壤地区已见使用。明清时期的京、津地区,乘坐冰床已成为冬季户外娱乐方式之一。在清代北京城,冰床已逐渐演变为冬季民俗事象之一。明清文学作品中有不少吟咏冰床的诗作。     

关于循环经济的理论辨析

循环经济是人类经济发展模式的必然选择。环境和资源是循环经济的核心；循环经济是一个经济活动过程。而不是一个经济要素，这是循环经济的本质；对资源的节约、环境的保护，是循环经济的主要特征。作为一种思想或理念，循环经济与可持续发展有着密切的联系，可谓一脉相承。     

Recovering metals from printed circuit board scrap by a mechanical separation process

A mechanical separation process was developed for recovering metals from printed circuit board （PCB） scrap; it included three steps： impact crushing, sieving and fluidization separation. The mechanism of the technique was based on the difference in the crushabilities of metallic and nonmetallic materials in the PCBs that led to the concentrated distribution of metals in particles of larger sizes and nonmetals mostly in particles of smaller sizes. It was found that crushed PCB particles from 0.125 mm to 1.000 mm contained about 80% of metals in the PCBs. Metals acquired satisfactory liberation in particles smaller than 0.800 mm. The crushed PCB particles were sieved into fractions of different size ranges. Each fraction separately went through a gas-solid fluidized bed operating at a selected optimal gas velocity for the specific size range. Approximately 95% of metals in printed circuit board particles from 0.125 mm to 0.800 mm was recovered by the gas-fluidized bed separator at the selected optimal gas velocity. However, separation of metals from particles smaller than 0.125 mm was not satisfactory. Further study is needed on metal recovery from fine particles.     

提高流通人员素质,强化图书馆人文精神

图书馆的人文关怀体现在流通部工作人员的服务之中,流通人员的素质是图书馆人文精神的重要指标。根据目前我国高校图书馆流通人员素质现状,要强化图书馆人文精神,必须大力提高流通人员素质。     

EXPERIMENTAL STUDY OF GAS—SOLID SUSPENSION FLOWS IN VORTEXING FLUIDIZED BED CHAMBER FREEBOARD

Gas flows and particle mass flux were measured and clutriation experimentswere conducted in two cold test models of vortexing fluidized bed(VFB).The experimen-tal results show that the secondary air injected tangentially creates strong vortexes,estab-lishes particle suspension layers and internal circulation,and suppresses the elutriation offine particles greatly.The vortexing fluidized bed combustion has bright prospect bccauseof its much higher combustion efficiency and desulphidation efficiency than bubblingfluidized bed combustion due to long particle residence time and high slip velocity betweengas and solid,and its simpler configuration and lower cost than circulating fluidized bedcombustion.     

科学认识资产重组和资本运营的含义

资产重组是以资本运营的手段实现的企业经营战略，资本运营是生产要素优化组合和资源优化配置的过程。科学认识资产重组和资本运营的含义，有助于国有企业的深化改革。     

高纯碳酸锶纳米粉体制备的新工艺研究

以八水氢氧化锶和二氧化碳为原料，开发了在超重力旋转床反应器中直接碳化合成高纯纳米碳酸锶新工艺，对反应物浓度、旋转速度和表面活性剂添加量等影响因素进行了研究，结果表明，控制适当的工艺条件，可得到平均粒径小于80mm、主含量大于99％，比表面积大于14m^2／g的产品。