宝钢4号高炉炉衬温度场数学模型及分析

以宝钢新建4号高炉炉衬结构为原型,以多类边界条件处理边界传热问题,建立了炉衬结构三维温度场数学模型.基于该模型,分析了炉衬温度场分布,讨论了炉内渣皮形成与脱落的温度条件和冷却热负荷对炉衬温度场的影响.结果表明,在炉身中下部和炉腹、炉腰部位炉衬内表面到冷却板前端的100mm范围内是炉衬耐材易损区和渣皮形成区;在1300~1450℃炉气温度范围内易于形成稳定的渣皮层,而1450℃以上区域渣皮的形成与稳定取决于该部位的冷却负荷;保证铜冷却板长期使用的最低水流量需不小于6t/h.     

“能力-机会”视角下的创新效率与路径选择——来自我国制造业的经验证据

在资源约束前提下,能否有效提升创新效率是选择创新路径的重要考量依据。本文将技术外取分解为技术引进和研发外包两种模式,基于后发国家的创新追赶,从“能力-机会”视角,实证考察了中国自主研发与技术外取对制造业创新效率的影响。研究发现：(1)自主研发对制造业创新效率提升产生显著影响,呈现出“先提高后降低”的倒“U”型关系。(2)当研发能力不强时,技术引进对创新效率有正向提升作用,而研发外包则相反,当研发能力得到增强以后才有助于创新效率提升。(3)自主研发与技术引进以及自主研发与研发外包的交互作用对制造业创新效率提升分别呈现出显著的替代效应和互补效应。这些研究结论,为探讨制造业技术创新路径选择策略提供了有益的启示。     

Evolution of microstructure and electromagnetic interference shielding performance during the ZrC precursor thermal decomposition process

A polymer-derived ZrC ceramic with excellent electromagnetic interference(EMI) shielding performance was developed to meet ultra-high temperature requirements. The thermal decomposition process of ZrC organic precursor was studied to reveal the evolution of phase composition, microstructure, and EMI shielding performance. Furthermore, the carbothermal reduction reaction occurred at 1300°C, and the transition from ZrO2 to ZrC was completed at 1700°C. With the increase in the annealing temperature...     

用二元光学技术制作透射式Kinoform

相息图的最大优点是同轴、衍射效率比较高,理想情况下可以达到１００％,采用Ｇｅｒｃｈｂｅｒｇ－Ｓａｘｔｏｎ的失空算法,在物域和频域之间进行多次迭代,使频谱的振幅大致为常数,并对频谱的位相进行量化,用二元光学技术制叶阶透射式Ｋｉｎｆｏｒｍ,再现时获得了清晰的像,衍射效率较高。     

从市场经济共性的角度把握马克思的失业理论

失业是商品经济发展的产物,与社会制度无关,资本有机构成的提高是失业的重要原因,失业的形式在不同的发展阶段有不同的表现,失业对社会经济发展有重要的积极作用,但也不能忽视其消极作用,必须认真对待。     

Theory,Method and Application of a State RecognitionBased on Theory of Evidence

A new method of state recognition based on the theory of evidence was proposed. By this method, the plausible function which the sample awaiting recognition belongs to each category can be obtained through distance function. For the marginal samples,two or a batch of evidences can be combined and a new plausible function can be obtained by new evidence. Then the categories of samples can be determined according to plausibility function. This method provides a beder reasoning framework. The result proves the rate of recoghition correctness.     

论新疆东准噶尔蛇绿岩的时代及其意义

讨论了位于新疆准噶尔盆地东北缘的克拉麦里和阿尔曼太两条蛇绿岩带。侧重从蛇绿岩自身的同位素定年、伴生组分的微体古生物和蛇绿岩带的区域构造等方面系统阐述这两条蛇绿岩带的时代。作者得到的新认识是：这两条蛇绿岩带所代表的古洋发育的时代相近,可能从新元古代晚期开始孕育,发育的鼎盛时期是寒武纪至早、中奥陶世,晚奥陶世到早志留民为其萎缩、闭合时期,这个新认识在重建古亚洲洋和认识北疆大陆地壳演化历史方面都有重要意义。     

人的本质是内在精神本质和外在劳动本质的辩证统一

人的本质问题,是历史唯物主义的核心问题。必须从人的联系,从人的内部联系和外部联系去把握;人的本质是内部本质和外部本质的辩证统一,是内部精神本质和外部劳动本质的辩证统一。     

Feedback control strategy of longitudinal temperature and finished carbonization time for coke oven and its application

Based on the detailed analysis of the third coke oven in BaoSteel, a feedback control strategy of longitudinal temperature and finished carbonization time of coke ovens was proposed and it was applied to the third coke oven in BaoSteel. As a result, the ratio of the instance that the absolute deviation of the longitudinal temperature is within ±7°C and the finished carbonization time within ± 10 min is more than 80%, having acquired the patent saving effect of an energy consumption lowered by 2.92%. At the same time, it can provide an example for the same coke ovens inside and outside the nation.     

底水油藏水平井开发见水后生产动态预测

水平井技术是开发底水油藏、延长油井见水时间与提高底水油藏采收率的一项重要技术,但是水平井见水后的动态预测与控制是这项技术的难点。在前人研究的基础上建立了一个水平井开发底水油藏的简化物理模型,并从此模型出发经过推导与简化得到了一个简单易行的水平井开发底水油藏见水后动态生产规律的预测方法,并编制了计算机程序,结合华北任丘油田水平井实际生产情况进行了预测分析与应用。从实例预测对比结果可以看出,该方法预测精度令人满意。