试论孙光宪词的抒情方式

词体文学的形成和特色,与其独特的抒情方式有很大关系.做为应歌而作的流行歌体,描写对象的类型化和抒情方式的模式化,的确是早期词的重要特征,而且一直影响着词体文学的发展.孙光宪词虽然也带有浓厚的花间色彩,但无论从人物、情感,还是时空场景都有了很大变化,其抒情方式在花间词人中别具一格,有着鲜明的个性色彩.     

Effect of Electromagnetic Stirring on Solidification Structure of Incoloy 825 Superalloy

Superalloy Inconel 825 has been extensively used in chemical industry and transportation industry due to its excellent creep rupture strength and prominent corrosion resistant properties under various circumstances.However,the mass production of this alloy by continuous casting method is restricted because of the serious macrosegregation and coarse grains in the billet.In current,a linear travelling magnetic field was introduced in the solidification process of Inconel 825 with the aim of changing the fmal microstructure by electromagnetic stirring(EMS)force.The results have indicated that the dendrite structure of Incoloy 825 is refined obviously with applying EMS,and the mechanism of dendrite refinement is presumed to the introduction of a forced convection within the solidifying melt.Moreover,The number and the size of precipitated phases including carbide and nitride were found to be significantly reduced with EMS,a phenomenon on the reduction of interdendritic segregation of titanium and molybdenum was simultaneously observed,which demonstrated that he release of interdendritic segregation by EMS inhibits the growth dynamic of carbide and nitride from the melt.     

Efficient Evaluation of Monitoring Top-t Most Influential Places

The continuous top-t most influential place (CTtMIP)query is defined formally and solved efficiently in this paper.A CTtMIP query continuously monitors the t places with the maximum influence from the ...     

四川洞松电站施工中泵送混凝土堵管原因分析及对策

结合四川省甘孜州洞松水电站枢纽工程的泵送混凝土施工经验,分析了泵送混凝土发生堵管故障的主要原因,从设备性能、人为操作、混凝土质量,以及其他一些方面,提出了预防和减少堵管故障的方法和措施。     

顺酐市场现状及技术发展趋势

介绍顺酐的国内外全球市场概况、主要生产技术及其研究开发动向。     

从催化重整副产C9芳烃分离制取偏三甲苯、均三甲苯技术

深化连续重整重芳烃开发应用,不仅可以大幅度增加均三甲苯的产量,而且能副产其他高附加值产品,使连续重整重芳烃利用的综合经济性得到改善.阐述了国内已经开发和工业化应用的偏三甲苯、均三甲苯分离制取技术,呼吁开发和有效利用C9芳烃其他成分.     

浅谈管壳式换热器的振动及预防措施

对管壳式换热器在换热过程中管束振动的原因进行分析,并阐述了相应观点,文中对如何防止管壳式换热器管束振动提出了一些切实和具体的解决方法。预防振动对换热器设计者来说值得共同探讨。     

埋地热油管道埋深对土壤温度场的影响

长输管道沿线地质、水文等条件不同,管道埋深差别较大。相应埋深处的自然地温及管道周围的温度场也不同。若只考虑平均或当量深度来进行管道计算,会产生很大误差。使用数值方法将所考虑的数值模型更接近于实际冻土地质条件和非线性特性就显得格外重要。采用有限单元法,对不同埋深条件下的管道周围土壤温度场进行三维数值计算,结果表明,管道温度变化在一定程度上受埋深影响,尤其在冻土地区,地埋温差与管道周围土壤温差较大。     

纤维素纤维技术现状与发展

扼要论述了Lyocell、醋酯纤维以及传统粘胶纤维的纺制技术现状和发展趋势,对这几种纤维素纤维在中国的发展提出了几点看法,认为应该通过Lyocell纤维的研究实践锻炼出一支技术队伍,积极开发国产化纺织用醋酯纤维,严格限制传统粘胶纤维生产的短视性扩张。     

采用煤矸石为原料合成β-SiAlON晶须及其显微结构研究

以煤矸石和碳黑为主要原料,在1800 K下碳热还原氮化合成了纯度较高、含有大量晶须的β-SiAlON材料.FESEM照片表明β-SiAlON晶须多为细长柱状,直径120～220 nm,长度1.5～5 μm,晶须生长机制由VLS(vapor-liquid-solid)机制和VS(vapor-solid)机制组成.