817 research outputs found
Research on the Strategy of CNBM Co., Ltd.
摘要 随着改革开放的三十年,钢铁这一重要的生产资料作为商品进入流通市场,整个行业经历了高速迅猛的发展,2013年统计从事钢铁贸易的企业多达20万家,钢铁贸易总额占据全国GDP总值的10%,钢铁贸易行业发挥着国民经济中越来越重要的作用。但是在经历了黄金十年高速发展期后,在产能布局日趋完善,管理科学化、生产精细化发展的涌入,市场竞争日趋激烈,产能严重过剩,钢材价格持续走低,整个行业盈利低下,甚至处于难以生存的境界。在中国经济新常态下钢铁行业面临结构调整,产业升级的变革时代。 本文通过对中建材集团进出口上海公司(简称CNBM公司)的核心竞争力,盈利能力、发展历程、现状进行简要分析,利用PES...Abstract With the reform and opening up three decades, this important steel production into circulation as a commodity market Steel blind investment, resulting in a surplus of production capacity, it is estimated that of the overall size of the excess steel production capacity has reached more than 150 million, 2013 Statistical engaged in steel trade enterprises up to 200 000, Steel occupied t...学位:工商管理硕士院系专业:管理学院_工商管理硕士(高级管理人员工商管理硕士)学号:X201215634
科技史新书目·2012年中国大陆(2)
华北细石叶工艺的文化适应研究:晋冀地区部分旧石器时代晚期遗址的考古学分析*(青年学者文丛)陈虹著,浙江大学出版社,323页,48元。图证考工记:新注新译及其设计学意义刘道广等著,东南大学出版社,143页,32元。东周秦汉时期车马埋葬研究*(考古学与中原文化)赵海洲著,科学出版社,199页,98元
Inulin Molecular Detection Methods of High-Performance Gel FiltrationChromatography and Changes in Inulin Molecular Weight During Storage
菊芋是一种耐盐抗旱植物,可用于生产菊糖.菊糖具有良好的生物活性,其活性受到聚合度的影响.本研究对比了各项条件,总结得到了一套可以用于测定菊糖相对分子量的高效凝胶过滤色谱(HPGFC)方法:纯水为流动相,0.8 m L/min洗脱,Shodex OHpak SB-804HQ色谱柱检测,柱温控制在30℃,样品进样量为每次20μL,检测器为示差折光检测器(RID),采用Sigma公司生产的右旋糖酐标准品,绘制二次方的标准曲线,检测菊糖的相对分子质量.同时利用确定的凝胶过滤色谱(GFC)方法,观察了种植于海岸带盐碱地的菊芋块茎采收后在贮藏过程中的菊糖分子量的变化,发现在?20℃的贮藏条件下,菊芋中的菊..
论现行国际货币合作框架下美元与欧元的合作
相对于欧元与美元竞争对国际货币体系稳定的作用,欧元与美元的合作对稳定双边汇率关系,进而稳定国际货币体系可能更重要。然而,由于欧洲中央银行的地位问题没有得到完全解决,以往国际货币合作的主要框架——七国财长和央行行长会议在欧元启动之后其作用可能会削弱。但因各种因素的影响,对于欧元美元合作对国际货币体系稳定的作用不能寄予过多希望
Research on the Prediction of Roof Geostructure Using Drilling Mechanical Data
An analytical model for drilling process was proposed to describe the relations among physical properties of the rocks and mechanical data. Based on this model, a drilling system was developed. This drilling system can measure the mechanical drilling data and predict the geological conditions. 1) Development of the analytical model for rock drilling. In this analytical model, a drilling process is divided into continuous cycles, each of which includes two motions: feeding and cutting. Feeding is treated as an indentation motion. A linear relation exists between indentation pressure (thrust) and the indentation depth (penetration rate). Cutting forces and frictions of both the rake face and the flank face are examined. Especially, a virtual base is set to the model to simulate the contact surface between the flank face of the bit and the rock. Some relations among rock properties, bit shapes, and drilling parameters (rotary speed, thrust, torque, and stroke) were deduced. According to this model, drilling torque consists of four parts generated from cutting, friction, feeding, and idle running respectively. Similar to torque, specific energy also has four parts from cutting, friction, feeding, and idle running respectively. For this study, the effective specific energy is defined as the sum of specific energy consumed by cutting and feeding. It is more useful to evaluate uniaxial compressive strength (UCS) than other parameters are. 2) Development of the drilling system. The hardware of this system consists of a drilling machine (Trussmaster Series) and some instruments to measure mechanical data. The software can analyze the data from the mechanical data and predict the geostructure of roadways, rock physical properties and discontinuities of the strata. 3) Laboratory and field experiments. Some laboratory tests and field experiments were performed to verify the usefulness and effectiveness of the proposed model and the drilling system. With the mechanical data, the rock physical properties were evaluated. Meanwhile, the specimens taken from the fields were tested in laboratory to get their physical properties. The predicted values were agreed with the measured values. 4) Visualization of the geostructure. An application of VRML (virtual reality modeling language) was developed to display the predicted geostructure of roadway in 3D. The strata and the discontinuities (cracks, boundary faces, etc.) can be displayed. The results of this study show that the drilling system is useful and feasible. Our future work is to improve the prediction precision and to apply the drilling model to other types of drilling machines.室蘭工業大学 (Muroran Institute of Technology)博士(工学
A Research on the Internationalization of Japanese Yen
本文主要采用理论和实证分析相结合的方法,在对日元国际化的历史和日元在国际货币体系中的地位进行归纳总结的基础上,重点探讨了影响日元国际化发展的主要因素、日元国际化对日本经济的效应以及日元国际化的前景。随着我国经济的迅速发展,人民币在今后一段时间内必然成为可兑换货币并最终走向国际化。我国和日本在金融领域有着很多相似的地方,研究日元国际化发展过程中的一些经验和教训对人民币的国际化有一定的借鉴意义,对人民币在东亚区域货币合作中与日元的竞争、合作策略的选择也有启示意义。本文主要创新之处在于从二战后国际货币体系的变迁以及日元在国际社会的供给等方面,系统地分析了影响日元国际化发展的因素。从日本金融业、对外贸...Based on summing up the history of Japanese Yen internationalization and summarizing the status of Japanese Yen in international monetary system, the dissertation, by means of the method of combining theory and empirical analysis, probes emphatically into the main elements influencing the development of Yen internationalization, into the effects of Yen internationalization on Japanese economy, and...学位:经济学博士院系专业:经济学院国际贸易系_世界经济学号:B20020900
Design and Implementation of Hotel Management System Based on ASP.NET Technology
随着计算机科学技术和互联网技术的快速发展,人们的消费观念、生活理念也在持续的转变。当前,对于酒店服务行业来说,传统的人工管理方式已经无法很好的满足高效率、快节奏的业务需求。因此,通过改变观念和应用计算机软件技术,深入探索新的信息管理模式,实现酒店业务管理的网络化,自动化,信息化,并为管理者以及不同类型的消费者提供准确、高效和便捷的酒店服务,这些重要的课题已经摆在酒店行业面前。 本文的主要工作是,对当前中内外酒店管理系统进行调研分析。结合软件开发的科学方法,以软件系统研发的角度,对酒店行业的酒店管理系统进行研究分析,最终实现一个基于ASP.NET技术的,采用MVC架构的酒店管理Web系统。本文...With the rapid development of computer science and Internet technology, the consumption concept and life style have greatly changed. For hotel service industry, the traditional manual management cannot meet the needs of high-efficient and fast-paced business need. Therefore, by the means of changing concept and computer software, exploring a new way of information management to make hotel business...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201223004
The effect of nurse initiated patient/family education strategy on people with schizophrenia in Beijing
2004-2005 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe
虚化的终极:合音——以烟台方言若干虚成分合音为例
官话方言里,意义的虚化常常伴随着语音的弱化,语音弱化的终极是合音。合音语法化造成烟台方言虚成分两种虚化路向——变调和儿化,这两种路向基本以虚成分的性质为条件,附着性的助词成分、词缀发生变调合音,非附着性的介隔性介词成分发生儿化(变韵)合音。合音是作为分析性语言的汉语语法词或附着词的后续阶段的虚化模式,异于形态变化语言的屈折形态。同济大学国际文化交流学院科研启动基金资助项
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