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For initial photochemical conversion efficiency of chlorophyll fluorescence parameters, Day change rate curve presented "V" type: apparently decreased at noon, and rose in the afternoon. It appeared "Mirror" relation with the changes of light intensity.

叶绿素荧光参数PSⅡ的原初光化学转化效率日变化呈&V&字型曲线,中午明显降低,下午开始回升,与光强的曲线呈&镜面&对应现象。

Soil water characteristic curve is one of important parameters for modeling waterflow and solutes transport.

0引言土壤水分特征曲线(soil water characteristic curve,SWCC)是表示土壤水吸力和土壤含水量之间关系的曲线,是模拟土壤水分运动和溶质迁移的重要参数之一。

Dynamic interaction of wheel-rail is studied by using DSAS software when Blue-Arrow power car, trail car,"SS8" locomotive and passenger car with "209" bogies pass through a curve with severe rail oblique crack in Guang-Shen railway, respectively. Results of the above cases are compared and analyzed. Based on these results, effect of track structure parameter and train speed on dynamic interaction of wheel and rail in curve track is discussed, and a set of synthetic and effective technology measure which eliminates or releases rail oblique crack is put forward, The results can be expected to provide theoretic basis and guidance for engineering practice.

运用DSAS软件,研究了&蓝剑&动车组动车、拖车、&SS8&机车和209转向架客车通过广深线某钢轨斜裂纹重伤曲线的轮轨动态相互作用,并对几种车型的计算结果进行了比较和分析;在此基础上,讨论与分析了轨道结构参数及行车速度对曲线轨道的轮轨动态相互作用的影响,从而提出了一套综合有效的抑制或减轻钢轨斜裂纹的技术措施,以期为工程实际提供理论依据和指导。

Based on evaluating the H production rate decline curve, this paper focuses on the curve's limitations and adjusts it by theory derivation.

在总结H递减曲线优缺点的基础上,针对其存在的缺陷,通过理论推导对其进行修正完善,得到了一种新型的、符合守恒定律的产能递减曲线类型,并给出了相应的递减参数求解方法。

The fitting algorithm of product section and overall unit performance curves, the plane interpolation algorithm and mathematical method of physical property parameter of various single gas are mainly discussed, and also dealt with the technique of information integration on developing environment and data base application etc.

介绍了设计开发的风机性能信息系统,着重论述了产品段性能曲线和整机性能曲线的拟合算法、各种单一气体物性参数的平面插值算法等数学方法,还涉及到开发环境的信息集成和数据库的应用等技术。

The fitting algorithm of product section and overall unit performance curves, the plane interpolation algorithm and mathematical method of physical property parameter of various single gas are mainly discussed, and also dealt with the technique of information integration on developing environment and data base application etc.

风机性能信息系统的设计开发摘要:介绍了设计开发的风机性能信息系统,着重论述了产品段性能曲线和整机性能曲线的拟合算法、各种单一气体物性参数的平面插值算法等数学方法,还涉及到开发环境的信息集成和数据库的应用等技术。

As for the difficulty to determine the point of maximum slope of the transition curve and the bug of using little information of the system, a PID parameters tuning method is presented in this paper based on multinomial fitting of the models transition curve.

针对实际中常用的飞升曲线法难以确定最大斜率处和利用系统信息较少的不足,提出了一种基于曲线拟合的PID控制器参数整定方法。

Based on the tomato and eggplant supply data of Shanghai in sequence of year, using meteorological data in SAMR(The data management system of Shanghai Agricultural Meteorology Report) and screening the meteorological factors related to the vagetable output, the authors carried out curve fitting and estimation of related parameters of distribution function.

Gompertz曲线和对数正态分布函数(Logarithmic normal distribution function)作为这二种蔬菜上市趋势的数学模型,进行曲线拟合,先调用上海市农业科学院测试中心的SAMR农业气象资料数据库所存贮的气象数据,筛选与该蔬菜产量有密切相关的气象因子,再用多元回归方法对初选因子作进一步的筛选,从而估计出分布函数的有关参数。

Generally speaking, we are quite familiar with the Frenet frame of curves, whose coefficient matrix is skew-symmetric.

通常我们比较熟悉的是曲线的Frenet标架,曲线的Frenet标架关于参数求导得到的系数矩阵是一个斜对称矩阵。

By applying the sinusoidal wave mode to simulate the rugged surface of bridge deck,accounting for vehicle-bridge interaction and using Euler-Bernoulli beam theory, a coupling vibration model of vehicle-bridge system was developed. The model was solved by mode analyzing method and Runge-Kutta method, and the dynamic response and the resonance curve of the bridge were obtained. It is found that there are two resonance regions, one represents the main resonance while the other the minor resonance, in the reson...

通过用正弦波形模拟桥面的不平和考虑移动车辆-桥梁间的相互作用,在Euler_Bernoulli梁理论的基础上建立了一种车桥系统的耦合振动模型·利用模态分析法和Runge_Kutta法对模型进行数值求解,获得了车桥系统耦合振动的动态响应和共振曲线·发现车桥耦合振动的共振曲线中存在两个共振区域,一个反映主共振而另一个反映次共振·讨论了桥面不平、桥梁振型和车辆间的相互作用对系统振动的影响·数值结果表明,这些参数对系统振动的影响很大,桥面不平和振型对车桥系统耦合振动的影响不能忽略,设计车速应该远离临界车速

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But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊!不用提了。提到肉,真是糟透了。

Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.

Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。