WT615增压CNG电喷发动机燃烧特性数值分析

以WT615 CNG发动机为模拟研究对象,采用KIVA-3V软件建立了多维软件计算模型,并验证了模型的准确性。在此基础上研究了主要结构参数——燃烧室形状对燃烧特性和整机性能的影响。研究表明,直口形燃烧室的动力性、经济性能最好,更加适用于该天然气发动机,但排放性能有待提高;缩口形燃烧室的整机性能次之,碗形燃烧室的动力性和经济性则较差,后燃现象严重,不适用于天然气发动机。     

Flexibility analysis and design of heat exchanger network for syngas-to-methanol process

The heat exchanger network (HEN) in a syngas-to-methanol process was designed and optimized based on pinch technology under stable operating conditions to balan...     

Systematic adsorption process of petroleum hydrocarbon by immobilised petroleum-degradation bacteria system in degradation pathways

In order to effectively control petroleum hydrocarbon pollution by immobilisation technology,it is necessary to understanding the degradation pathways of petrol...     

Beyond the financial crisis: a way forward with development paradigm

As the impact of the financial crisis spreads worldwide, it has become a top priority of various countries, international institutions, entrepreneurs and scholars to find innovative and creative ways to face this challenge. As Hazel Henderson (2002) has pointed out, “the world has not fallen into a financial crisis, but fundamentally fell into a crisis of development paradigm.” We need to reflect seriously on this paradigm and rethink of the social and economic models and cultural values for meeting the challenges of this crisis. The paper introduces key issues of development within a global context, and explores the shift of the value system from hard technology centered to soft technology-based future direction of human development.     

110kV电缆竣工试验引发事故的分析

通过对一起110kV XLPE电缆线路竣工试验所引发的事故进行分析,提出110kV电缆交流试验应该注意的一些问题,以期引起同行的借鉴和参考。     

在线CT导纳测试及其应用

讨论了常见电流互感器(CT)的故障及其特征,提出了一种实现在线电流互感器测试的新方法——导纳测试法;介绍了澳大利亚红相电力设备公司505型导纳测试仪的工作原理及实用性。     

燃料棒中铯活度比A(~(134)Cs)/A(~(137)Cs)的轴向分布测量与分析

在热室中 ,用γ扫描装置对秦山核电厂 3× 3 -2考验组件中辐照历史、燃耗及冷却时间不同的两根燃料棒中的铯活度比A(13 4 Cs) /A(13 7Cs)的轴向分布进行了测量 ,并利用自行开发的压水堆燃料棒破损特性分析程序FCAC进行了理论计算。结果表明 :辐照和停堆冷却过程中燃料棒中铯原子的轴向迁移可以忽略 ,燃料棒中铯活度比的轴向分布由燃耗的轴向分布决定。     

Correction strategy of fuel injection quantity during pilot-main injection for common rail system

Journal of Mechanical Science and Technology - Common rail system is a key technology of energy saving and emission reduction for modern diesel engines. Multiple injection, as one of the most...     

A Delay-Dependent Approach to Robust H ∞ Control for Uncertain Stochastic Systems with State and Input Delays

In this paper, the problem of delay-dependent robust H _∞ control for uncertain stochastic systems with state and input delays is investigated. The time delays are assumed to be bounded and time varying and the uncertainties are assumed to be norm bounded. By using the Lyapunov functional method, a new delay-dependent robust H _∞ control scheme is presented in terms of linear matrix inequalities (LMIs). Some numerical examples are given to illustrate the effectiveness of the proposed approach. This work is partially supported by the Natural Science Foundation of China (60674055, 60774047), and the Taishan Scholar Programme of Shandong Province. An erratum to this article can be found at     

优化出口商品结构,促进南通外贸业可持续发展

入世后,南通市出口贸易总额每年都在不断增加,但同时,出口商品的结构却并未发生显著的改观,仍以低端的纺织和服装业为主体,而附加值较高的机电产品和高新技术产品在出口份额中所占的比重偏低。在对出口商品产业结构进行调整时,应集中力量发展高新技术产业,坚持贯彻“以质取胜”的出口战略,致力于创立自己的品牌,走品牌化发展之路。