我国出口产业结构优化问题探讨

我国在外贸上长期处于顺差,但外贸增长主要还是依靠数量上的扩张,出口产业结构普遍存在着档次低、区域雷同化现象严重等问题。本文在对我国出口产业结构现状进行分析的基础上,结合出口产业结构发展规律,提出了我国出口产业结构优化的原则,并提出了相关对策建议。     

市场导向型产业集群模式下的技术扩散机制探讨

目前我国存在的产业集群可以分为市场导向型、政府扶持型以及计划型三种模式。市场导向型产业集群广泛分布于我国经济比较发达的“长三角”及“珠三角”等地区。本文重点对市场主导型产业集群进行论述,找出市场导向型产业集群模式下技术扩散的制约要素,并在此基础上,对市场导向型产业集群模式下的技术扩散进行机制设计。     

浅谈建筑方案设计阶段的造价控制

在项目作出决策后,控制工程造价的关键就在于设计阶段,而设计阶段中的方案设计阶段又尤为重要。从设计方案的技术经济分析和方案的总体评价优选这两个方面出发,阐述了如何在方案设计阶段有效地控制工程造价。     

铜街子工程左岸砼面板堆石坝施工

为适应铜街子工程左岸的不利地质条件,设计单位在左岸设计了砼面板堆石坝.对过渡垫层料采用拌和楼配料拌和,严格控制铺料厚度和碾压遍数以保证垫层的密实性和平整度,在面板砼配合比设计中,选用水化热较低,收缩性较小的大坝525水泥,并掺15％的粉煤灰改造了砼的和易性,提高了抗裂性.在面板砼浇筑中严格控制砼陷度,避开高温和严寒季节,采用了无轨滑模新工艺等,积累了经验并有所创新.     

Teaching Interactive Media Design

In todays, computer-centered society, designing interactive media has emerged as a new profession. Interactive design is often associated with spread of computers as a communication and interaction tool. However, interactive design has been a staple of artists and designers for many centuries. We present a historical perspective upon interactive design and point out the close relationship of this field with different fields of art and design. We argue that interactive media design is a distinct and evolving field and that it is imperative to teach it as such. In this paper, we have adopted this perspective and detailed a new four-year under-graduate curriculum on interactive media design education. This curriculum stresses the various components of interactive media design and its close relationship with computer science. This revised version was published online in July 2006 with corrections to the Cover Date.     

用修正法设计任意进制同步计数器

用修正法设计任意进制同步计娄数器,是在同步二进制计数器高低位触发器连接具有规律的基础上,个性其中某些位的驱动方程。使之按 N 进制计数器状态计数。修正法较常规用卡诺图化简——求状态方程——求驱动方程的方法,工作效率大为提高,省去了大量重复的卡诺图化简及繁琐的状态方程,避免了人为因素造成的差错,是一种快速、高效、简便的设计方法。     

Trade Structure and Trade liberalization: The emerging pattern between the EU and Transition Economies

The purpose of this study is to find empirical evidence for the assumption that trade liberalization unlocks the potential of the Transition Economies (TEs) to achieve technological upgrading, productivity progress and catching-up (in terms of income). The study examines the trade structure now emerging between the European Union (EU) and the TEs in the light of two sets of differently liberalized trade items identified by the European Agreements. The aim is to determine whether trade liberalization has helped to supersede the structures – reflected mainly in the low quality of products – inherited by the TEs from the command economy. The empirical results are interpreted in the light of the Flam-Helpman quality-cycle model. We find evidence of an ongoing division of labor between high quality products (EU) and low quality products (TEs) according to a cycle. The first stage comprises the already well established dominance of quality advantage products by EU countries producing and exporting high-quality products, which crowd out the TEs' production of similar products. The second stage is the exploitation of cost-advantages by TEs in less liberalized trade, and there they appear to achieve better results. All these results may be taken as support for an active government in TEs.     

高拱坝新型合理体形的研究和应用

对动力优化,多目标优化,新体形及周边缝等的攻关研究,在已有的拱坝优化的基础上,从多拱梁优化发展到有限元优化,从静力优化发展到考虑地震荷载的动力优化,从单目标优化发展到双目标优化和多目标优化,发展和完善了我国提出的建立在拱坝优化的基础上的二次曲线及混合曲线拱坝新体形;使拱坝优化技术能适应高拱坝的体形设计,为小湾,溪洛渡等水电站的设计提供了参考,保持并扩大了我国在国际上拱坝体形设计领域的领先优势。     

水工混凝土耐久性研究的新进展

国家“九五”攻关“混凝土抗冻性研究”和“耐化学腐蚀及高耐蚀材料的研究”两个专题中,包括了高抗冻超抗冻混凝土的开发及应用、高强混凝土的抗冻性、混凝土抗冻性的定量化设计、荷载和高浓度硫酸盐侵蚀的研究,以及压力水下混凝土渗漏溶蚀的研究等子题。研究成果已通过国家科技部的鉴定,并在三峡大坝等工程中得到了应用,取得了良好的效果。     

积极探索开拓未来为抽水蓄能电站建设作出更大贡献

由华东勘测设计研究院勘测设计的天荒坪抽水蓄能电站是华东地区第一座大型抽水蓄能电站,也是我国单个厂房装机容量最大,水头最高的抽水蓄能电站,为适应改革开放后经济发展的需要,华东院积极探索深度开发华东地区水能资源的方法,步骤和目标,重点研究了开发抽水蓄能电站的经济性和必要性,为抽水蓄能事业的发展作出了贡献,在天荒坪电站建设中,为适应新的建设管理体制,华东院牢固树立“为工程服务,为业主服务”的思想,坚持科技进步,取得了一系列科技成果,并积极参与工程监理,锻炼了队伍,培养了人才。