组合函数

Obconica were always higher than that of P. vulgaris. In the experiments of medicament treatment Membership Function was introduced to have a comprehensive evaluation on heat-resistance of P. obconica and P. vulgaris under five levels of fixed temperature. The results were as follows: P. obconica 30℃: The compages of SA 150 mg·L~(-1 and CaCl_21500 mg·L~(-1 can increase plant"s heat-resistance observably. 32℃: Using SA only 200 mg·L~(-1 can increase plant"s heat-resistance observably.34℃: The compages of SA 50mg·L~(-1 and CaCl_21500 mg·L~(-1 can increase plant"s heat-resistance observably.36℃: The compages of SA 50 mg·L~(-1 and CaCl_22000 mg·L~(-1 can increase plant"s heat-resistance observably.38℃: The compages of SA 150 mg·L~(-1 and CaCl_21000 mg·L~(-1 can increase plants heat-resistance observably.

运用隶属函数法对经过药物处理的两种报春进行综合评价，得出五个温度条件下各处理间耐热性的强弱，四季报春：30℃：150 mg·L~(-1)的SA和1 500 mg·L~(-1)的CaCl_2的组合对于提高四季报春的耐热性最好，其次是100 mg·L~(-1)的SA和1000 mg·L~(-1)的CaCl_2的组合处理；32℃：单一施用200 mg·L~(-1)的SA达到了最好的效果，其次是施用100 mg·L~(-1)的SA和1500 mg·L~(-1)的CaCl_2的组合，效果最弱的是单一施用500 mg·L~(-1)的CaCl_2；34℃：混合施用50 mg·L~(-1)的SA和1500 mg·L~(-1)的CaCl_2对于提高四季报春的耐热性效果最好；36 ℃：混合施用50 mg·L~(-1)的SA和2000 mg·L~(-1)的CaCl_2对于四季报春耐热性的提高效果最好，而单一施用100 mg·L~(-1)的SA的效果最弱；38℃：150 mg·L~(-1)的SA和1000 mg·L~(-1)的CaCl_2混合施用能有效提高四季报春的耐热性。

Chapter six presents such new concepts as margin utility contribution force, profit-risk exchange rate, state-expectation-variance utility function, long-term expectation-variance utility curve and optimal portfolio expansion curve. The state-expectation-variance analytical method is developed from the expectation-variance analytical method. The changing rate of profit-risk exchange rate to state variable is used to define and distinguish the decreasing, constant and increasing relative risk aversion. A decomposition formula about the margin contribution force of holding wealth to state-expectation-variance utility function is displayed. The decomposition formula demonstrates that the contribution force of investors' holding wealth to their utility is composed of the pure contribution force of holding wealth and the investment contribution force bronght about through investment portfolio.

第六章提出了边际效用贡献力、收益—风险替换率、状态—期望—方差效用函数、长期期望—方差效用曲线、最优证券组合扩展线等新概念；把期望—方差分析方法发展成状态—期望—方差分析方法；用收益—风险替换率对状态变量ω的变化率来定义和区分递减、定常、递增相对风险厌恶；获得了持有财富对状态—期望—方差效用函数的边际贡献力的分解式，该分解公式表明投资者的持有财富对他的效用的贡献力由持有财富本身的纯贡献力和持有财富通过投资证券组合所产生的投资贡献力所组成。

Using the dynamic programming approach, an explicit solution to the value function of the optimal portfolio problem is obtained by the HJB equation, and the optimal investment strategy is given.

在风险投资服从Heston模型的假设下，研究了幂效用函数的最优投资组合问题，利用动态规划方法通过HJB方程得到最优投资组合价值函数的显式解，并给出最优投资策略。

Meanwhile, on the basis of simulation model, the paper introduces the concepts of the combination of ship types, combination of berths, hectometer coastline throughput capability and coastline utilization ratio. By using curve fitting, the function between Tw/Tb and hectometer throughput capacity is achieved. Further more, the analysis of the optimal and suboptimal ship types combination and berths combination correspond to the fixed coastline and the optimal coastline length to the fixed ship types combination and berths combination is obtained.

同时，基于仿真模型，本文引入了船型组、泊位组、百米岸线通过能力及岸线利用率四个新的规划指标，拟合分析了到港船舶的待泊时间与靠泊时间比值Tw/Tb与百米岸线通过能力的函数关系，并进一步分析了在固定岸线长度下与其相适应的最优、次优的船型组合及泊位组合，确定船型组合、泊位组合情况下的最优岸线长度。

By using curve fitting, the function between Tw/Tb and hectometer throughput capacity is achieved. Further more, the analysis of the optimal and suboptimal ship types combination and berths combination correspond to the fixed coastline and the optimal coastline length to the fixed ship types combination and berths combination is obtained.

同时，基于仿真模型，本文引入了船型组、泊位组、百米岸线通过能力及岸线利用率四个新的规划指标，拟合分析了到港船舶的待泊时间与靠泊时间比值Tw/Tb与百米岸线通过能力的函数关系，并进一步分析了在固定岸线长度下与其相适应的最优、次优的船型组合及泊位组合，确定船型组合、泊位组合情况下的最优岸线长度。

The main results are as following: A A new demonstration to optical theorem is constructed B The scattering amplitude function for small particles, which is more accurate than that in classical RGB, is gained using electrostatics approximation, C Through a δ transform to the high frequent oscillation function, a concise deduction of the EG-type scattering amplitude function has been achieved.

主要结果如下： A给出了光学定理的一个新证法； B利用静场近似，得到了比经典RGB更精确的小粒子散射振幅函数； C通过一个高频振荡函数的δ变换，给出了一种EG散射振幅表达式的简明推导，并做了小角度散射简化，参照ADT，对EG近似又做了相位修正； D定义了一个新的函数—消光函数，并得到了组合散射体消光函数的平均定理。

After studying this phenomenon, the author finds that, the covariance matrix of the complex expressions of horizontal gradients of the disturbing gravity field elements has a structure of blockwise repetitive Toeplitz matrix, though the covariance within the disturbing gravity field elements is still anisotropic. Therefore, the collocation problem of the complex combination of horizontal components is similar to that of gravity anomaly, which makes the degradation be able to be completed by FFT transformation matrix.

作者研究发现，利用水平梯度的复组合，即复数表示后，扰动重力场元复组合之间的协方差函数尽管还是各向异性，但它们对应的协方差矩阵却具有分块 Toeplitz 循环阵的结构，因而水平分量复组合的配置问题与重力异常的配置问题相似，可以利用傅立叶变换矩阵进行降阶处理。

In theory, firstly, the numerical simulation methods, such as the boundary element method, the finite difference method and the finite element method, were utilized to calculate the distribution of electric field intensity and potential of the electron-gun system, the focusing system and the whole equipment, respectively. Then, the trajectories of the electron-beam were traced by using of the Runge-Kutta method and the Monte-Carlo method associatively. The point spread function was also calculated.

在理论分析中，先后采用边界元方法、差分方法、有限元方法等科学数值计算方法，编制程序，对X射线源的电子枪发射系统、聚焦系统以及发射系统与聚焦系统的组合系统等的电场分布进行了严格的计算，在准确求得各系统电场内各个剖分点的电场场强、偏导数等参量的基础上，采用蒙特-卡罗模拟方法和不等距龙格-库塔方法相结合，追踪由LaB_6单晶阴极表面发射出的大量电子束在电场内的运动轨迹，求出点扩展函数，并根据点扩展函数的优劣，反复调节、大量计算对比，挑选出X射线源最佳的电极结构及其组合。

Transient signals to be restored can be expressed as a linear combination of wavelets whose weight coefficients, dilations and shifts are calculated by the conjugate gradient algorithm in terms of the least mean squared energy criterion.

该方法将要复原的瞬态信号表示成一组子波函数的线性组合，在最小均方能量准则下，用共轭梯度算法求解子波函数的线性组合的幅度、尺度和延时参数。

In the second chapter, during the study of compound x-ray refractive lenses, diffraction function of compound lens is derived in the light of refraction and absorption effect and the design theory of X-ray is deduced using diffraction theory in connection with the characteristic of X-ray band.

在第二章X射线聚焦组合透镜的研究中，针对X射线波段的特性，综合考虑折射和吸收效应得出组合透镜的衍射屏函数，利用衍射理论推导出X射线聚焦组合透镜的设计理论并进行结构设计与微细加工制作技术研究。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。