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Search Results: 1 - 10 of 9677 matches for " 葛忠良? "
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白介素-6细胞因子家族新成员:心肌营养素-1
华平?,忠良
生物化学与生物物理进展 , 1998,
Abstract: 心肌营养素-1(cardiotrophin-1,ct-1)是一个新发现的白介素-6家族细胞因子,小鼠ct-1的mrna长约1.4kb,编码蛋白由203个氨基酸组成,以gp130和lifr为受体.ct-1对心肌细胞既有肥大诱导作用,又有保护作用;能改变交感神经元的递质表型,促进多巴胺神经元、睫状神经元和运动神经元的存活;还能抑制骨髓白血病细胞m1的生长;诱导肝细胞急性相反应;小鼠腹腔注射给药可增加血小板、红细胞记数和血红蛋白浓度.
用脉冲电场凝胶电泳分析棉病囊霉及其突变体的染色体dna
杨素红?,忠良
生物化学与生物物理进展 , 1993,
Abstract: 采用交变脉冲电场凝胶电泳和碱变性交变脉冲电场凝胶电泳方法,分析了棉病囊霉酵母菌及其2个不同的突变菌株的核型,得知此菌株含有5条染色体dna,而2株突变体的染色体dna都没有大片段的缺失或双链断裂,但其稳定性不如野生型菌株的dna,而且存在单链断裂等碱不稳定性位点.
自主式水下航行器三维路径跟踪的神经网络H∞鲁棒自适应控制方法
,忠良,高剑
控制理论与应用 , 2012, DOI: 10.7641/j.issn.1000-8152.2012.3.CCTA100648
Abstract: 本文研究了存在模型不确定以及外界未知扰动情况下的自主式水下航行器(AUV)的三维路径跟踪控制问题.针对此问题,首先利用时标分离原理及正交投影Serret-Frenet坐标系建立了描述AUV质心运动及姿态运动的的仿射非线性数学模型.其次,在控制器设计中运用神经网络H∞鲁棒自适应算法克服了模型的不确定性及扰动,同时在控制器设计中利用了主导输入的思想,降低了闭环系统的复杂度,减少了实时计算工作量,便于工程应用.基于Lyapunov理论的分析保证了系统的稳定性.仿真结果表明,路径跟踪控制律可以保证AUV沿期望路径运动,并且具有良好的动态性能.
mn-sod对cho细胞电离辐射敏感性的影响
孙娟?,陈瑗?,周玫?,忠良,黎明涛?
生物化学与生物物理进展 , 1997,
Abstract: 近年来的研究发现,il-1和tnf是重要的辐射防护因子,因il-1和tnf都能选择性诱导mn-sod的高度表达,因此认为mn-sod可能有辐射防护作用.通过转染有义和反义mn-sodcdna于cho细胞,进一步说明了mn-sod在抗电离辐射损伤中的作用.研究表明,转染有义mn-sodcdna可降低细胞对电离辐射的敏感性,而转染反义mn-sodcdna的细胞克隆对电离辐射的敏感性升高.
Neural network H-infinity robust adaptive control for autonomous underwater vehicle in 3-dimensional path following
自主式水下航行器三维路径跟踪的神经网络H∞鲁棒自适应控制方法

GE Hui,JING Zhong-liang,GAO Jian,
,忠良,高剑

控制理论与应用 , 2012,
Abstract: The 3-dimensional path following control of autonomous underwater vehicle (AUV) with uncertain model and unknown disturbance is investigated. First, the time singular perturbation method and the orthogonal projection reference frame are used to model the position motion, and the attitude dynamic model of the AUV is described by an affine nonlinear system. Next, a neural network robust adaptive control algorithm is employed in the controller design to overcome the uncertainties of the model and the influence of external disturbances. Meanwhile, the dominant input idea is adopted to reduce the complexity of the closed-loop. The stability performance of the system is proved by using Lyaponov stability theory. Simulation indicates that the path following controller keeps the motion of AUV along the prescribed path with desirable performances.
1,3,5-三乙酰基六氢均三嗪的小分子法合成反应机理研究有机化学
忠良, 王鹏, 孟子晖, 刘越, 覃光明, 忠学, 王伯周
有机化学 , 2010,
Abstract: 1,3,5-三乙酰基六氢均三嗪(1,3,5-triacetyl-1,3,5-triazacyclohexane,TRAT)是高性能单质炸药黑索金的关键硝化前体.本研究以小分子三聚甲醛和乙腈为原料,浓硫酸为催化剂,合成了TRAT,产率为89%.合成并表征了N,N-亚甲基二乙酰胺和未见报道的三乙酰基二亚甲基三胺.根据已得到的几个中间体,推测了TRAT合成反应的可能机理.
适用于混合网格重叠的线性插值方法
An Linear Interpolation Method for Overset Mixed Grids Approach
 [PDF]

忠良, 方媛媛
International Journal of Mechanics Research (IJM) , 2015, DOI: 10.12677/IJM.2015.42005
Abstract:
基于线性重构方法,给出了一种适用于混合网格重叠方法的插值策略。该方法依赖于插值单元的格心流场变量值、单元梯度值和限制器函数值的计算来完成,只需要一层插值单元,就可以充分利用其宿主及所有相邻单元的信息。本文方法适用于任意网格单元类型间的插值计算,应用简洁方便。几个算例验证表明,本文方法适用于亚跨超全速域流场的数值计算。
An interpolation method based on the linear reconstruction is developed for the overset mixed grids approach. The present method depends on the calculations of the values of flow variables, the gradients and the limiter functions of the fringe cells. It employs only one layer of fringe cells along the intergrid boundary to use information of all adjacent cells of its donor. The present in-terpolation method treats different cell types in the same way, so it is very simple to apply. Several numerical results demonstrate that the present method can simulate subsonic, transonic and hypersonic flows.
SELECTION HIGH-YIELD RIBOFLAVIN PRODUCING STRAIN OF PROTOPLASTS TREATMENTED WITH UV
紫外线诱变原生质体选育核黄素高产菌株

Cheng Lurong Deng Xiuzhen Jiang Youmin Ge Zhonglian,
程鲁榕
,邓秀珍,江幼岷,忠良

微生物学通报 , 1993,
Abstract: In this paper, factors affecting protoplast formation, the microscopic observation of the process of protopplast formation and regeneration, the distribution of Riboflavins productivity among the protoplast regenerated clonies treated with UV were investigated.Protoplasts were obtained from mycelia of Eremothecium ashbyii by using a combined lyric enzyme system containing commercial cellulase and snail digestase. The frequence of the protoplast regeneration was 6.1&, The high-yield stable strain UP-91 was obtained by UV irradiation of protoplast and screening of the fermentation of many regenerative mutants. The productivity of the mutant was as 30% high as that of starting strain.
教育心理学的发展概况
忠良
心理学报 , 1982,
Abstract: 教育心理学作为心理科学与教育科学的一个独立分支,是在19世纪的后半期发生的。早期的教育心理学著作仅是心理学与教育工作相结合的产物。最早以教育心理命名的书,是俄国教育家与心理学家卡普杰烈夫()的《教育心理学》。此书发
一种卷烟生产数据采集管理系统的设计
忠良
计算机系统应用 , 1997,
Abstract: 本文介绍了一种用于卷烟生产数据采集与管理的数据采集系统的设计。
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