LC4L-20增压中冷柴油机的研制

介绍了LC4L-20增压中冷柴油机的性能与结构特点，着重分析了增压中冷技术，及各主要运动件的可靠性设计。     

平面药包抛掷爆破的漏斗特征解析

根据惠州港通用码头陆域平面药包抛掷爆破的实爆堆积测量分析成果 ,结合药包设计的主要参数 ,对平面药包产生的爆破漏斗的范围与形态、不同药包部位的残方比与抛掷率、药包的长抗比与圆柱体药包的应力波形演变关系予以解析 ,供硐室爆破的理论研究、模拟试验和总结条形药包特性时参考     

Solving regularized least squares with qualitatively controlled adaptive cross‐approximated matrices

The adaptive cross‐approximation (ACA) technique is applied to accelerating an inverse‐problem solver that estimates charge distribution on a dielectric spacer. The ACA generates an approximated system‐matrix that enables us to carry out high‐speed inverse calculation. We designed an approximation procedure based on ACA with some additional concepts, that is, (a) partitioning of matrix based on algebraic information, (b) approximation quality control based on matrix norms, and so on. The tested solver (LSQR for regularized least squares) with ACA demonstrates about 10 times faster performance than that without ACA. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 159(3): 10–18, 2007; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20326     

On the microhardness testing of electrically stressed poly(phenylene oxide): Polystyrene blends

Microhardness measurements have been performed on untreated (virgin) and electrically stressed, solvent‐cast laboratory‐prepared samples of pure poly(phenylene oxide) (PPO), pure polystyrene (PS), and PPO : PS polyblends with different weight proportions. Results of such measurement on untreated polyblend sample show that microhardness (H_v) increases with increase in the content of PS up to 10 wt %, which attributed to the existence of homogeneous phase morphology. However, this feature is not observable in samples containing higher content of PS. Electrical stress is found to modify considerably the mechanical property of polymer. The effect of electric field on the microhardness of such samples (PPO : PS :: 90 : 10) has been characterized by the existence of a peak. Trapping of charge carriers in electrically stressed samples imparts hardening to the polyblend up to an applied step field of 190 kV/cm. However, the excessive charging beyond this step field value destroys this characteristic. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

电容比和方向性对自给能γ剂量计探头的影响

本文给出了自给能γ剂量计探头在γ射线照射下积累电荷的测量结果，讨论了电容比和方向性对自给能γ剂量计探头的影响以及探头的饱和点。     

Physical Properties Important to Electrostatic and Non electrostatic Powder Transfer Efficiency in a Tumble Drum

ABSTRACT: Popcorn was oiled and coated in a tumble drum nonelectrostatically and electrostatically with sugar, cornstarch, salt, cellulose, maltodextrin, all-purpose flour, whole-wheat flour, or soy flour. Particle size, density, flowability, and chargeability were correlated to transfer efficiency using regression analysis. Of the various methods to measure chargeability, charge-to-mass and adhesion improvement were the most significant. For nonelectrostatic coating, small, dense, free-flowing powders were most efficient. Small, free-flowing highly charging powders were most efficient for electrostatic coating. Percent improvement was the highest for the least efficient powders. The greatest benefit with electrostatic coating was for low density, highly charging powders with no effect of size.     

日产1000t水泥熟料生产线的提产措施

通过对五级旋风筒下料管、回转窑转速、配料方案、物料稳定等四方面进行改进,达到提产目的。     

单孔护壁爆破数值模拟

运用LS-DYNA软件对单孔护壁爆破和切缝药包爆破进行了三维数值模拟,结果显示,由于PVC-U套管的存在,作用于孔壁的爆炸应力波峰值被显著削弱,降低率达到30%～46%,并推迟了其到达保留岩体孔壁时间.与传统的切缝药包爆破相比,保留岩体损伤更小.     

条形药包药量计算公式探讨

本文通过现有诸药量计算公式的总结和统计分析，认为经验函数划（ｎ）以二次式较合适。并根据流体动力学理论和临界能量密度破碎准则，推导出ｆ（ｎ）的二次项公式，得ｑ＝ＫＷ２（１十ｎ２）／２；该式较符合实际，故推荐供参考。     

压制球形药包解决退模问题的技术措施

文中简要阐述了在制备球形药包过程中,为解决压装药件的退模问题所采取的技术措施,并提出了较佳的成型底座的设计方案。