查询词典 exponential

On the basis of the kinetic equation of substrate reaction in the presence of urea or guanidine hydrochloride, all microscopic kinetic constants for the free enzyme and enzyme-substrate binary and ternary complexes have been determined. The results of the present studies indicate that:①In the presence of urea or guanidine hydrochloride, enzyme-substrate complexes lose their activity less rapidly than the free enzyme. Therefore, both substrates, NADPH and 7, 8-dihydrofolate, protect dihydrofolate reductase against inactivation.②The denaturation of dihydrofolate reductase by urea follows single-phase kinetics, and changes in enzyme activity and tertiary structure proceed simultaneously in the unfolding process, so it may be an"all or none"process.③The GdnHCl-induced unfolding of the dihydrofolate shows a biphasic transition, while the change in the enzyme activity is a single exponential process. The rate constant of inactivation is consistent with that of the fast conformational change. Therefore, the kinetic intermediate of protein unfolding should be a partially folded and inactive form.

我们根据在脲或盐酸胍存在下的底物反应动力学方程求得游离酶和酶底物二元、三元复合物的微观动力学常数，结果表明：①酶-底物二元、三元复合物的失活速度明显慢于游离酶，说明两个底物二氢叶酸和NADPH对酶的失活都具有一定程度的保护作用；②在脲作用下，酶的失活和构象变化均为单指数项过程，而且酶的活力丧失和三级结构变化是同时发生的，说明二氢叶酸还原酶的脲变性可能是一个"全或无"的两态过程；③在盐酸胍作用下，酶的构象变化为两相过程，而失活则是单指数项过程，酶分子构象变化的快相速度常数与失活速度常数基本一致，因此我们认为二氢叶酸还原酶的盐酸胍变性过程中存在一个没有活力、但仍具备一定空间结构的变性中间体。

Studies on statistical properties of spontaneous spike trains of single auditory nerve have shown that the distributing patterns of interval in spike trains represent Poisson distribution. Since Poisson distribution is one of the simplest stochastic processes, previous studies on spontaneous spike trains of single auditory nerve were performed primarily by assuming them as stochastic processes. Recently, further studies on nonlinear dynamic system show that we have not enough evidence to demonstrate the process, whose distribution of probability density is exponential, is Poisson process.

中文题名豚鼠听神经单纤维放电序列的非线性特性分析副题名外文题名 Analysis on nonlinear properties in spike trains of single auditory nerve fiber in guinea pig 论文作者林龙年导师孙心德教授学科专业生理学研究领域\研究方向听觉神经生物学学位级别博士学位授予单位华东师范大学学位授予日期2001 论文页码总数91页关键词听神经听觉神经生理豚鼠馆藏号BSLW /2001 /Q42 /41 对听神经单纤维自发放电序列的统计特性研究表明，听神经单纤维放电间隔呈泊松分布，而泊松过程是最简单的随机过程之一，因此以往的研究主要将听神经单纤维自发放电序列作为随机过程来处理。

Every year, patent documents are increasing by the exponential series.

每年的专利文献都以指数级的速度在增长。

A critical velocity was set in every iteration and the value of the critical velocity decreased according to exponential series in every iteration.

其方法是，设置一个随迭代的进行按指数级数减小的临界速度。

Based on synthetic evaluation model in fussy mathematics and cubic exponential smoothing method of time series, the evaluation and forecasting models are established.

3对常用旅游评价、预测的数学模型进行总结、分析后，采用基于模糊数学方法的模糊综合评价法、基于时间序列分析方法的三次指数平滑法建立本系统的评价及预测模型。

Absolutely convergence part and uniform convergence real part for the exponential series has been given.

给出了指数级数收敛实部、绝对收敛实部及一致收敛实部公式的严格证明。

With the Taylor series decomposition of exponential term involved in EAR model, an approximately equivalent form of EAR model is derived.

通过对EAR模型中的指数项进行Taylor级数展开，导出EAR模型的一种近似等价形式。

Analysis on the Astringency of a Hybrid-Domain Basis Function Based on Exponential Series Function;2. Research the Corn Production Efficiency of China Based on Malmquist Model and Astringency;3. The background of application of genetic algorithm to reservoir optimal operation and its astringency are introduced.

介绍了遗传算法在水库优化调度中的应用背景及算法的收敛性，讨论了水库优化调度中遗传算法的基本应用步骤以及存在的问题，给出了算法的各种改进方法，并对遗传算法的应用前景进行了展望。

A strict proof of the formulas of the convergence real part,absolutely convergence part and uniform convergence real part for the exponential series has been given.

给出了指数级数收敛实部、绝对收敛实部及一致收敛实部公式的严格证明。

The algorithm for K/N and cold standby equipment are studied by the Monte Carlo method. The algorithm for test and evaluation of binomial type unit, exponential type unit and series type equipment are implemented, the accuracy of the algorithms is validated with examples.

论文对专家信息融合的模型和算法进行了讨论，定义了专家信息之间的一致度，利用证据理论对专家信息一致度矩阵进行研究，提出了基于一致度的专家信息融合算法，该方法约束条件少，易于在可靠性试验评价中进行应用。

I hope that this success is just the first in a long series.

我希望这只是成功的开始。

Three dimensional stresses on the interface of tire and soil, tire deflection and soil sinkage are measured.

测试轮胎——沙土界面上的三向应力、轮胎变形和沙土沉陷；建立考虑剪切应力对沙土承载特性产生影响的车轮牵引性能预测模型；分析车轮作用下土壤的纵向稳定性。