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Search Results: 1 - 10 of 57689 matches for " 梁良 "
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中医药免疫调节治疗恶性肿瘤研究进展
,
中国中医药信息杂志 , 2004,
Abstract:
自动化溶液配制输送系统在水痘疫苗生产中的应用
Application of Automatic System for the Preparation and Delivery of Sterile Solutions in Varicella Vaccine Production
 [PDF]

郑波, , 马中锋, 马中
Hans Journal of Chemical Engineering and Technology (HJCET) , 2015, DOI: 10.12677/HJCET.2015.56020
Abstract:
目的:应用自动化系统配制输送用于生产水痘疫苗的无菌溶液,以满足水痘疫苗细胞工厂的规模化量产需求,减少批间差异。方法:将采用自动化系统配制输送用于水痘疫苗的传代制备所需溶液,与人工操作方式进行对照,比较两种操作方式的细胞生长情况、操作时间等,并对制备的疫苗原液进行相关检定。结果:在同样细胞复苏量的情况下,采用自动化操作系统比人工操作生产的水痘疫苗批间差异小,操作时间短,且相关检测指标均合格。结论:利用自动化溶液配制输送系统制备用于生产水痘疫苗的无菌溶液,提高了批间均一性,降低人工劳动强度,缩短操作时间,减少转运等中间环节,降低污染风险,可满足水痘疫苗细胞工厂的大规模生产。
Objective: Application of automatic system for the preparation and delivery of sterile solutions in varicella vaccine production meets the demand of scale production of varicella vaccine by use of cell factory. And it reduces differences between batches. Methods: The solutions for varicella vaccine passage are prepared by automatic system or manual operation mode. It is compared in cell growth, operating time, and product test of the two modes. Results: In the case of the same amount of cell recovery, almost no differences between the varicella vaccine production batches can be found, and it takes shorter operation time in use of automatic operation system than the manual operation mode. And the detection of indicators is qualified. Conclusion: The use of automatic system to prepare and deliver sterile solutions in varicella vaccine production can improve the homogeneity between vaccine batches, reduce labor intensity, shorten operation time, reduce transportation and other intermediate links, and decline the risk of contamination, which is able to meet the requirements for varicella vaccine cell factory scale production.
多平衡态的两种数值方案的比较
严邦,幼林
大气科学 , 1985,
Abstract: 本文用“半解析的非线性迭代格式”(下称S.A.I格式)和Arakawa格式分别对多平衡态问题求数值解,并把数值解和理论解作比较.对两种模态的计算结果表明:两种格式都有较好的精确度和一定的位相差.
三(羟甲基)氨基甲烷的纯化及其纯度鉴定
张中,树权
科学通报 , 1982,
Abstract: 三(羟甲基)氨基甲烷简称[THAM或Tris],是一种化学、生物化学和医药的有用试剂。为此,本品的纯化方法及纯度鉴定就成为引人注目的问题。一般,Tris的纯化多采用重结晶法,Koch等[1]曾在常压和氮气流下升华,但未能成功。我们采用真空升华法,达到纯化之目的,此法的优点是简单而又不致引入杂质,所得产品纯度不低于99.9%。
PE投资风险的分析与控制
王开(教授),
财会月刊 , 2009,
Abstract:   私募股权投资基金(PE)是一种高风险投资,其运作过程中存在着许多不确定性和风险。本文通过对PE投资过程中各种风险的分析,提出了控制风险的具体措施,以实现PE投资的良好运行。  【关键词】私募股权投资基金投资风险风险控制  私募股权投资基金(PE),这种投资方式以私募形式筹集资金并选择非上市企业进行权益性投资,而后通过上市、并购、回购等退出方式出售其所持股权以获取初始资本的回报利润。广义的PE为涵盖企业首次公开发行股票前各阶段的权益性投资。狭义的PE是指对已经形成一定规模并产生稳定现金流的成熟企业的投资,主要是指创业投资后期的投资。现今社会普遍所指的PE为狭义上的PE。PE采取的基本运作方式是,先低价买入企业的控股权,经过几年的运营和重组使其升值,再通过将企业出售或上市来获利。PE之所以不同于一般意义上的投资,主要在于投资的目标企业在可能获取高额收益的同时也蕴含着巨大的风险。尽管如此,仍有许多投资者热衷于风险投资,因为在他们看来投资的风险是可以通过风险管理加以控制的。
辐照三嵌段聚苯乙烯-丁二烯-4-乙烯基吡啶共聚物离子交换膜性能的研究——Ⅰ.季铵化、磺化试剂、反应温度对膜性能的影响
,应圣康
高分子学报 , 1991,
Abstract: 本文分别研究了以氯磺酸、浓硫酸为磺化试剂及一碘甲烷、二碘甲烷为季铵化试剂所制备的辐照聚笨乙烯-丁二烯-4-乙烯基吡啶离子交换膜的膜交换当量、吸水率,膜电位及膜电导率的性能。研究表明以氯磺酸为磺化试剂所制备的离子交换膜其离子交换当量比以浓硫酸寿磺化试剂的要高。以一碘甲烷为季铵化试剂制备的离子交换膜其离子交换当量要比以二碘甲烷为季铵化试剂的要高,但机械强度差。在相同条件下,提高反应温度,有利于膜的季铵化反应,而不利于膜的磺化反应。所制备的阴、阳离子交挟膜膜交换当量、膜电导率、吸水率及膜电位四者的关系是膜交换当量高则膜电导率、含水率高,而膜电位则下降。
基于pca和bp的水体chl-a含量高光谱反演方法
,
人民黄河 , 2011,
Abstract: ?利用主成分分析法对高光谱数据进行降维,将主成分得分作为输入,将水体20个采样点的叶绿素a(chl-a)含量实测数据作为输出,对bp神经网络进行训练学习,实现压缩光谱数据与chl-a含量的自适应非线性映射,并利用另外10个采样点数据对网络进行验证,结果表明预测值与实测值差距较小.
泊松方程分解解法迭代参数的一种选择
严邦,幼林?
气象学报 , 1985, DOI: 10.11676/qxxb1985.009
Abstract: 在大气动力学的研究过程中,常用位涡度方程讨论大尺度天气过程的动力学特征,一般可把位涡度写成?2φ+λ-2φ=ω(其中φ表示流函数).因此求位涡方程数值解的过程中,除了要解决所谓“非线性”问题之外,还要考虑椭圆型方程的数值方法.
基于气弹模型风洞试验的输电塔气动阻尼研究
Analysis of Aero-Dynamic Damping of Transmission Tower Based on Aero-Elastic Model Wind Tunnel

,枢果,王述
- , 2015,
Abstract: 输电塔挂线和不挂线情况下的气动阻尼比是精确进行其风振响应评估的重要参数。基于完全气弹模型风洞试验测试得到的位移与加速度响应时程,结合使用经验模态分解法(empirical mode decomposition, 简称EMD)、小波分析和随机减量方法(random decrement technology, 简称 RDT)以及Hilbert变换识别了输电塔在挂线和不挂线情况下各阶振型结构阻尼比和气动阻尼比,分析输电塔在挂线和不挂线情况下结构阻尼比和气动阻尼比的变化规律。结果显示,输电塔挂线时的结构阻尼比比不挂线情况要大;输电塔的气动阻尼比随各阶振型频率的增加而减小,随着风速的增加而增加。最后,采用最小二乘法拟合得到了在试验风速条件下气动阻尼比的经验公式。
Aero-dynamic damping ratios are significant parameters with which to accurately evaluate the wind dynamic responses of a transmission tower with and without lines. Based on the displacement and acceleration time series obtained by the full aero-elastic model wind tunnel, the first and second mode shape structural and aero-dynamic damping ratios of the electrical transmission tower with and without lines are evaluated respectively, by combining the empirical mode decomposition (EMD) method, wavelet analysis, random decrement technology (RDT) and Hilbert transform. In the meantime, the change rules of the structural and aero-dynamic damping ratios are analyzed. The results show that the structural damping ratios of the transmission tower with lines are larger than those without lines, and the aerodynamic damping ratios of the tower decrease with frequency while increasing with wind speeds. Furthermore, the empirical formulae to evaluate the aero-dynamic damping ratios of towers under the test wind speed are proposed based on the least mean square method.
Cd1–xMxO复合氧化物的制备及抗菌活性
Preparation and Antimicrobial Activity of Cd1–xMxO Composite Oxides
 [PDF]

孙檬茜, 效锡, 陈耀斌,
Hans Journal of Nanotechnology (NAT) , 2011, DOI: 10.12677/nat.2011.12009
Abstract:
用溶胶–凝胶法制备了Cd1–xMxO复合氧化物(M为Cu、Cr,x = 0.02,0.04,0.06,0.08,0.1)。用XRD、SEM表征了样品的物相结构和形貌。结果表明Cd1–xMxO纳米粒子为不规则的六角形貌,晶粒尺寸约为50~80 nm。抗菌测试表明Cd1–xMxO对金黄色葡萄球菌、大肠杆菌、白色念珠菌的抗菌活性明显优于纯的CdO。在掺Cu系列中,Cd0.94Cu0.06O和Cd0.94Cu0.08O样品分别对大肠杆菌和白色念珠菌的抗菌效果最佳;在掺Cr系列样品中,随Cr掺杂浓度增加对金黄色葡萄球菌的抑菌作用增强。
Cd1–xMxO composite oxides (M = Cu,Cr; x = 0.02,0.04,0.06,0.08,0.10) were prepared by sol-gel method. The X-ray powder diffraction (XRD) and scanning electron microscope (SEM) were employed to characterize the crystal structure and morphology of the samples. The results indicated that the Cd1–xMxO nanoparticles presented an irregular hexagonal shape and the their size is about 50~80 nm. Antibacterial testing showed that the Cd1–xMxO had excellent antibacterial activity than pure CdO against Staphylococcus aureus, Escherichia coli and Candida albicans. The Cd0.94Cu0.06O and Cd0.94Cu0.08O had the best
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