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This technique uses a spiral phase plate with a small central aperture placed on the Fourier plane of an imaging system. If the spiral phase filter is rotated by a certain angle around its central axis,a phase shift between the zero-order spatial frequency component and the remaining of the object is produced,and the magnitude of this phase Shift is proportional to the rotation angle. Using this property,we can record a sequence of intensity distribution of the output beams corresponding to different rotation angles,and then digitally reconstruct the objects by using a phase-shifting algorithm. Both the theoretical analysis and simulation experiment results demonstrate the feasibility of this approach.

在成像系统的频谱面上放置中心带有一通光孔径的螺旋相位板,在输出面上记录输入物体经螺旋相位滤波后的输出像;将螺旋相位滤波器绕轴旋转一定角度,通过中心光孔的零频成份与其他高频成份间会产生与旋转角度成正比的相移;利用这一特点,通过记录多幅对应不同旋转角度的输出光场强度分布图,然后再用一定的相移算法实现被记录物体相位分布的数字再现。

Simulated mathematical models include several physics principles, e.g., distribution of stress-induced refractive index in the panda fiber of MRI, phase contrast, and image error of optical fiber around the observation plane of the objective lens.

仿真数学模型考虑了匹配型熊猫光纤的应力折射率分布、相衬成像原理、光纤在物镜观察面上的相衬成像偏差等物理图像。

When the Moon in a nocturnal Geniture passes by her beamsform Mars to Saturn, many inconveniences will happen to he Native,chiefly associated with women.

如果晚上出生,且月亮与火星成出相并与土星成入相,盘主将遭遇很多麻烦,且主要是与女性相关。

When the Moon in a nocturnal Geniture passes by her beams form Mars to Saturn, many inconveniences will happen to he Native, chiefly associated with women.

如果晚上出生,且月亮与火星成出相并与土星成入相,盘主将遭遇很多麻烦,且主要是与女性相关。

Hydrocyanic acid and water proceed via a five-centred transition states then transformed by its exterior hydrogen-bond; The results show that the activation energy of the isomerizing reaction in the aqueous phase is lower than that in the gas phase. It is likely that the hydrogen bonds formed in the complexes and the solvent effect play an important role.

计算结果表明,在水相中异构化过程的活化能比在气相中低,无论在气相还是在水相中异氢氰酸通过水氢键转化成氢氰酸容易些,而氢氰酸由水氢键转化成异氢氰酸相对要困难些,分子间氢键和溶剂化效应在异构化反应过程中起到重要的作用。

The scene of the geo-park is rich in volcanic rocks, which predominately consists of pyroclast-bearing and volcanoclastic rocks with porphyritic texture and can be classed into plutonic, epizonal, intrusive, extrusive and eruptive environments.

通过对大别山金刚台国家地质公园火山岩的岩性特征、火山岩相、相模式和火山机构的研究,认为火成岩斑状结构的含碎屑碎屑状岩石可以有深成、浅成、侵出、喷溢或爆发等不同产状。

The content of the irregular bigger drop phase approached to pyrope. It showed that the crystallization and phase separation mechanics of the glass was the nucleation-and-growth transformation and the crystallization is bulk crystallization. The activation energies of phase separation and crystallization were calculated by the modified Kissinger method, about 310.445 KJ/mol and 249.26 KJ/mol respectively. Using the aluminum hydroxide as the reference, we calibrated the phase separation exothermal enthalpy of the quenched and nucleation treated glass, ca

钠镁侣硅系统徽晶玻瑞快速徽晶化机理的研究利用上式求得混合系统中两相的单位体积相变自由能、两相间的表面能和相互作用参数,分别为刁。6753xlo3了zcm3·、3ss.gozzem3、5.316xlo一JzcmZ和一442 xlol,进而求得球形核的临界半径为nnm,以及一个临界核的成核自由能变化为2石89 x10一14/cm3;成核半径16.5纳米时,球形核稳定存在,实测 1752个球形核中最小核半径为20纳米,与计算结果基本吻合。

The variation of pH and conductivity of various phosphate solution with the solution temperature were obtained based on the physical chemistry theory and ionization equilibrium theory in electrolytic solutions, and be testified experimentally under radiation of ultrasonic wave. The pH was a linear function with the reciprocal of thermodynamic temperature, and the conductivity was a linear function with the temperature in phosphate solution.

三、超声波对双水相系统组成物质、两相组成及溶质分配影响的研究根据物理化学原理和电解质溶液电离平衡理论分析推导和实验验证,揭示了超声波作用下不同组成磷酸盐溶液的pH值和电导率随溶液主体温度变化的规律:磷酸盐溶液的pH值与溶液主体绝对温度的倒数成线性关系,磷酸盐溶液的电导率与溶液主体温度成线性关系。

A grating function and a groove function are introduced to determine the structure of a concave grating. Basic ideas for the design of a flat-field concave grating with three stigmatic points are proposed. As a proof of the usefulness of these design approaches, image conditions of the grating with three stigmatic points are developed which concise with other published results and they are more general than those obtained from holographic gratings.

采用与分析三维光栅相类似的级数展开法给出了二维集成凹面光栅的球差、彗差的计算方法,计算中用光栅函数和槽面函数来描述具有任意形状和任意变化周期的光栅,提出了一种具有三个无像差点的平面场型凹面光栅的设计方法,利用该方法推导了三点无像差光栅的成像条件,与文献中用其它方法获得的结果相一致,该结果与全息光栅的成像条件相比,更具一般性。

Discussion on membrane formation mechanismBased on the Flory-Huggins theory, Phase equilibrium equations of PVDF/DMAc/water ternary system were wrote out, and the binodal and spinodal lines in the phase diagrams of the system were obtained via numerical calculation. Combined the kinetic description and the thermodynamic phase diagram, membrane formation process were analyzed, which prepared the theoretical foundation for the further membrane formation mechanism research.

论文主要从如下四个方面展开:(1)PVDF疏水膜成膜分相机理探讨基于Flory-Huggins理论推导了三元制膜体系凝胶分相组成的线性表达式,并通过&浊点法&测定了PVDF/N,N-二甲基乙酰胺/水/成膜体系的凝胶边界线组成,通过对实验数据的拟合,得到了简捷直观的线性表达式,ln(φ_1)/(φ_3)=bln(φ_2)/(φ_3)+a,误差小于3%。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。