二次曲线

In digital process method of the I-V characteristic curves of the probe, we carry out the smooth treatment of the curves and obtain the second derivatives of the curves, using the ready-made software ORIGIN5.O. This is a simple and effective method.

在对探针特性曲线的数值处理方法上，采用了现成软件Origin5.0先对其进行光滑处理，然后进行二次微分的方法，取得了良好的效果。

1 Oven order 5.1.1 first hearth cloth Wind board laying 200mm thickness of the bed material; About Revert cloth laying Wind board thickness 200mm bed material, to prevent Ogive burn plug secondary air pipe; 5.1.2 prior to Add a small amount of flammable wood furnace and left and right back Feeder, ignition Wind Road in oven two days before ignition; 5.1.3 ignition started Ovens need to use a small amount of diesel added to the accumulation of wood, wood ignition when combustible, wood drying to around 200 ° C, according to adjust primer wind baffle and then curves of thermal insulation and heating.

5.1烘炉顺序 5.1.1先将炉床布风板上铺设厚度为200mm的床料；左右返料器布风板上铺设厚度200mm床料，防止把风帽烧坏，堵塞二次风管； 5.1.2事先将少量易燃木柴放入炉膛和左、右返料器，点火风道应在烘炉前2天进行点火； 5.1.3开始烘炉点火时需要用少量的柴油加在堆积的木柴上，点火时木柴易燃烧，木柴烘至200℃左右后，根据情况调节引风挡板，再按升温曲线保温、升温。

In chapter 4, the case of risk asset allocation with allowed sell and restricted short sell is discussed, especially in case of restricted short sell, the efficient frontier piecewise partition is determined by using duality theory in parametric quadratic programming. And the concept of tripartition is introduced, economic meaning stated and algorithm to determine efficient frontier proposed.

特别对限制卖空的证券组合，应用参数二次规划对偶性理论解决了有效边缘曲线分片划分的问题，并引入了三元分割的概念，解释其经济意义，同时给出确定有效边缘的算法；对于协方差矩阵是奇异的情况，利用矩阵分块技术，得到不同情形下有效边缘的解析表达式，并用直观的几何图形描述，克服了M-V模型在实证分析中遇到的困难。

The paper puts forward a proposal on the basis of its differentiation model to distinguish plumule grains in rice mass.

利用计算机视觉系统，研究大米胚芽的自动识别方法，在分析大米的表面积及轮廓线的二次微分曲线基础上，提出利用大米微分模型识别群体胚芽米的留胚率的设想

The model of programmed crystallization of SPM was proposed based on the moment transformation of the population considering the agglomeration. The optimal temperature-time curves in a batch crystallizer which maximized the terminal mean size and mean weight size can be determined from the application of the Pontryagin Maximum Principle. The calculated crystallization results heating under optimal temperature were compared with ones under linear or natural heating temperature.

根据第四章所得到的螺旋霉素晶体二次成核和晶体生长和布朗扩散引起的聚集动力学，利用第六章所描述的晶体尺寸分布的各阶矩对时间的一阶导数所构成的自封闭的一阶常微分方程组，采用庞得里亚金极大值原理，以温度为控制变量，在满足某些约束条件下，以最大平均尺寸和最大晶体重量平均尺寸为性能指标，计算出了螺旋霉素间歇结晶的最优温度—时间曲线，并同线性加热和自然方式进行了比较。

Therefore,a series studies of ice-pier vibration are performed from different aspects in this paper.The main work of this his thesis is summarized as follows:(1) Ice response spectra is proposed based on the idea of a seismic response spectra analysis of str .. uctures.Firstly,ice response spectra on the basis of power spectra density function is established;Secondly,based on the assumption of quadratic parabolic interpolation method,the nonlinear interpolation analysis method of ice response spectra is studied from both theoretical and practical points of view,and the successive computation formulas including ice displacement,velocity and acceleration response spectrum are deduced by Duhamel integral.Furthermore,to analyze the effectivity and applicability of the method, the real temporal curves of ice pressure are used to be studied.The results show that the presented method is more convenient and accurate to study the structural response induced by ice force,also it can be effectively applied in the design of ice resistance.

鉴于此，本文针对冰激桥墩结构振动问题从不同方面展开了一系列与之相关的研究，主要研究内容如下：(1)根据结构抗震反应分析思想提出了冰振反应谱，首先建立了基于功率谱密度函数的冰振反应谱；其次借鉴地震反应谱内插法的思想从理论和实际观点出发，假定在等距离微小时间间隔内冰荷载按二次抛物线规律变化，由Duhamel积分推导出冰振位移、速度以及加速度反应谱的一系列连锁公式，建立了基于非线性内插法的冰振反应谱，并利用实际冰压力时程曲线进行了冰振反应谱数值分析，为以后冰激结构振动的研究提供一种方便、简捷、精确的分析方法，也能够将其有效地应用到结构的抗冰计算中。

General admissibility of linear predictor of future observations in growth curve model under quadratic loss function is investigated.

在二次损失情况下，研究一般增长曲线模型中未来观察值线性预测的泛容许性。

In view of it, the algorithm based on the Fast Fourier Transform techniques with quadratic interpolation in the frequency domain is mainly presented. After that,the simulation is carried on and analyse the simulation curves deeply. It ndicates that this algorithm can not only enhance the frequency resolution, but only estimated frequency has high reliability and excellent stability. And it\'s feasible.

主要介绍一种基于FFT和在频域内二次插值的频偏估计算法，之后进行仿真、深入分析仿真曲线，结果表明该算法不仅可以提高频偏估计的精度，而且频偏估计值具有很高的可靠性和良好的稳定性，该算法是可行的。

The first deceleration phase of motion and the over-corner P-H curve constructed for regions with sharp corners are devised by quadratic and constant velocity interpolation algorithms, respectively.

第一阶段的减速运动和过度角落PH值曲线构建区域急剧角落设计的二次和恒定速度插补算法分别。

Hence the following conclusion can be made:①Although an inflection point occrus on the cooling curve, it cannot be regarded as secondary recalescence, but might be called as pseudo-recalescence.

据此认为：①实验中所获得的冷却曲线，尽管再辉阶段出现温度变化拐点，但不能认为是"二次再辉"，姑且称作"伪再辉"。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。