查询词典 integration by substitution
- 与 integration by substitution 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The results showed that the degree of butyryl substitution of CAB increased and the degree of acetyl substitution of CAB decreased as the activation time increased. The degree of substitution of CAB changed slightly after the esterification went along about 2h.
随着活化时间的增加,CAB的丁酯取代度会逐渐增大,乙酯取代度会逐渐减小;酯化反应2h后,CAB取代度变化不大;CAB的丁酯取代度随着反应体系中丁酰基摩尔分数的增加而增大,而乙酯取代度则随着丁酰基摩尔分数的增加而减小。
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The factors affect on the degree of substitution of product, yield and apparent viscosity, such as the mol rates of EPTAC with -NH2, reaction temperature, reaction time and the content of water in system have been discussed in detail. FTIR spectrometer and UV spectrometer are used to characterize the structure of the derivative and it is proved that substitution reaction mainly occurs on the -N element .The particle size and morphology of chitosan and quantemary ammonium salt of chitosan are analysised by comparing photos of their scanning electron microscope. The degree of substitution of HACC is determined by acid -base conductometric titration. An error in current formula of DS has pointed out and a correct formula has presented.On the base of experience of above experiment, the reaction conditions of HACC were systematically investigated through orthogonal design, and then the best conditions are found. Water-solubility and dependence of pH are studied.
壳聚糖和环氧丙基三甲基氯化铵在异相条件下发生反应,通过单因素实验,制备了一系列不同性能的壳聚糖季铵盐,本文首次详细讨论了反应条件(反应摩尔比、反应时间、反应温度、水含量)对产率及产物性能的影响;用红外光谱和核磁共振对结构进行表征分析时,发现季铵盐阳离子基以N位上取代为主;通过电镜图片对壳聚糖和季铵盐衍生物外观形貌进行对比,采用酸碱电导滴定法测定产物的取代度,并对常用取代度公式做了修正。
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The average percent value of G C (49.3%) was less than that of A T (50.7%), there was a bias of the content of G, T in the third codon; The number of transition G-A and T-C were 22, 15 respectively, which were higher than that of transition A-G and C-T, the number of tranversion C-A, T-G is 2 respectively, and other tranversion patterns didnt occur; the probability of transition was higher than that of tranversion , Ts/Tv = 9.5-19, there was the highest number of transition in the third codon. The gamma parameter a of the lst,nd and 3rd codon positions were 0.00572,0.01237 and 1.05239 respectively, they showed that there was adifferent substitution rate at different codon position. Frequences of synonymous codon usage were relatively biased. The average rates of synonymous and nonsynonymous substitution were 0.0787, 0.0011 respectively, there was a significant difference between dS and dN (Z = 4.713, p.01), and the low ratio( CD = 0.0284 .3) of dN/dS ratio impled that there were selective constraints against the nonsynonymous sites in cyt-b gene, The distribution of nonsynonymous codon substitution pattern related to Grantharm distance indicated that the purified selection at 2nd codon positions was more intensive than that at 1st codon positions. The phylogenetic trees supported the view of the double origin of Chinese goose, which means that domestic Chinese goose was derived from Anser cygnoides and domestic European goose, and Yili was derived from Anser anser.
碱基含量分析可知,序列的G C含量(49.3%)<A T含量(50.7%),密码子第三位点的G、T含量都有较强的偏倚性;序列间G→A和T→C的转换数(22次和15次)高于A→G和C→T的转换数(10次和9次),C→A、T→G颠换数均为2次,其余颠换模式均未发生;转换数明显高于颠换数,Ts/Tv=9.5~19,密码子第三位点的转换数最高,呈现了相当强烈的转换偏倚性;密码子第一、二和三位点的gamma分布参数α值分别为0.00572、0.01237和1.05239,表明密码子第一位点的替换速率变异最大,第二位点次之,第三位点的替换速率变异相对较小;编码同一氨基酸的同义密码子并非随机使用,表现出一定程度的使用偏倚性;同义替换速率和非同义替换速率分别为0.0787和0.0011,dS与dN值间的差异极显著(Z=4.713,p<0.01),而ω=0.0284,明显小于0.3,表明雁属鹅细胞色素b基因序列经历了中度净化选择作用;单步非同义替换(Sing-step nonsymonymous codon substitution,SSNCS)分布模式与Grantharm距离之间的关系说明密码子的三个位点所受的净化选择强度不同;构建的最大简约树与邻接树拓扑结构一致,支持中国家鹅的双起源学说,即除伊犁鹅外的其它中国鹅品种起源于鸿雁,伊犁鹅和欧洲的郎德鹅、莱茵鹅起源于灰雁。
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The results show that the torsion energy and van der Waals interaction energy are the main types of energy and the substitution group has a great effect on the total energy of molecular. The aliphatic substitution would lead to the increase of total energy, while the aromatic substitution would lead to the decrease of total energy. The calculated results of bond length show that the bond length of aliphatic C—C is longer than that of aromatic C—C, which indicates that the rupture of aliphatic C—C is easier than that of aromatic C—C on heating.
研究结果表明,扭转能和范德华能是分子中的主要作用力,取代基对体系能量有明显影响,烷基取代基使体系能量增加,而苯基取代基使体系能量降低;脂肪C—C键长比芳香C—C键长长,说明脂肪C—C在受热过程中比芳香C—C更容易断裂分解。
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In order to eliminate integration drift in 3-phase alternating large current measurement apparatus, the substitution of inertia link (approximate integration circuit) for the integration circuit is proposed by our Research Group.
为了解决三相交流大电流测量装置中的"积分漂移"问题,我们科研组采用惯性环节取代积分电路。
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The Monte Carlo integration that the domain of integration is curved or complex connected curved polyhedron and the integrand has singular points is discussed in this chapter.where G is the domain of integration that is the curved polyhedron, and X P,where G, G,(i = 1,2,...s) is the domain of integration thatis the curved polyhedron,Chapter 3 Deals with the computer simulation on the multiple random current and LIFO multiple service desks mixed queuing system modles in discrete event system.
Z,为。厂的奇异点,且、训方」 SZ;。G一U乓,:一',2,第三章讨论了多随机顾客流且后进先出的先有Ul个服务台并联,然后有 V个服务台串联,最后有UZ个服务台并联的串并联混合和先有 Vl个服务台串联,然后有U个服务台并联,最后有VZ个服务台串联的串并联混合多服务台排队系统模型的计算机模拟。
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From the idea of integration this paper tries to research and set up an elementary theory of mechatronics integration. Then guided by the modern design methodology, the article concludes the partial integration of system and forms general method of mechatronics integration which aims to realize the system optimization.
文中尝试着从集成的角度出发,以现代设计方法学为指导,将机电一体化设计中的局部集成设计方法加以总结、概括,形成了统一的以系统整体优化为目标的机电一体化集成方法。
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A variable-step modified Euler time integration method is proposed and analyzed. Four major factors that affect the efficiency of the variable-step modified Euler time integration method are discussed. These include stability and accuracy analysis for the damped fix-step modified Euler integration formula, adjustment method of the fix-step basic integration formula to accommodate step-size changes, suitable range of the step-size selection strategy based on truncation error concept and development of the step-size selection strategy based on apparent frequency concept to satisfied the specified error bound and stability condition.
提出了变步长修正Euler时间积分法,详细讨论了影响变步长修正Euler时间积分算法效率的四个主要因素,它们包括:有阻尼问题的修正Euler法的稳定性和精度分析,调整固定步长的基本积分公式使之容纳步长大小变化的研究,基于截断误差概念的步长大小选择策略适用范围的讨论,同时满足规定误差界和稳定性条件的、基于表观频率概念的步长大小选择策略的建立。
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The theme uses structure design of WUHAN DAMING company OAS for example, to actualize GIS and OAS integration exploitation, preferring two settlement ways: firstly, if you wants GIS and other computer system for integration no suture, you must use integration exploitation of GIS fully, and use tools software of GIS and graphic exploitation language in integration re-exploitation;then it is fully to utilize space data, to achieve effective assistant decision-making system;and, to research and to design database of based on metadata technique, distributed data management and share technique.
论文以武汉达明公司的办公自动化系统的结构设计为例,对实现GIS与OAS的集成开发,提出了两种解决办法:一是如果要让GIS 可以很方便地与各种计算机信息系统进行一体化的无缝集成的话,就要充分地利用GIS 的集成开发方式,结合GIS 工具软件与可视化开发语言进行集成的二次开发;二是要充分地利用空间数据,实现有效的辅助决策系统,对基于元数据技术的、分布式的数据管理与共享技术的数据库系统进行研究和设计。
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On one hand, the integration between literary autonomy and social heteronomy is the abscissa of the coordinate axis. On the other hand, the integration of ancient and present poetic resources, and Chinese and western poetic resources is the ordinate of the coordinate axis. Integration in Wu Mi\'s poetic thoughts is embodied in two aspects: Firstly, it means the integration of ancient and present poetic resources, and Chinese and western poetic resources. Wu Mi maintains that various poetic resources should be treated equally so as to find the similarities and differences among them. Only with a broad cultural view and calm attitude toward various poetics resources can a new system of modern poetics be achieved.
吴宓打破了"中学"/"西学","旧学"/"新学"之间的界线,主张在无新旧无中西的开阔视野上,将古今中外各种诗学资源置于同一平台上,以开阔的文化视野和冷静的学术心态敏锐甄别其间的异同和联系,从瞬息万变的"多"中找到普遍永恒的"一"作为中西古今诗(来源:ABC794d79论文网www.abclunwen.com)学资源的结"和"点,在整合传统与现代、中国与西方的基础上,熔冶出一个新的现代诗学理论体系。
- 相关中文对照歌词
- Substitution
- F*ck You Google+
- Theme From The Pit
- Here With You Tonight
- Ball Of Confusion
- Big Takeover
- Ball Of Confusion
- There's Nothing Like This
- Let The Drummer Kick
- Strength In Numbers
- 推荐网络例句
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A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.
如氮气之类的载体通过管线20和阀22引入,与管线26相通,与气体样品混合。
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But for the most part, knaves and parasites had the command of his fortune
然而支配他的家产的大多是恶棍和寄生虫。
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For he that is now called a prophet, in time past was called a seer.
他们就往天主的人所住的城里去了。