能面

1Makesure surface is closed and not too thin no plates, fins or wings

确保面是闭合的，不能太细长最大的面块尺寸不得超过0.2波长*0.2波长，即24.6mm*24.6mm

The influence of position of the substitution, strength and number of donors and acceptors, and their coplanarity and asymmetry is discussed. The results indicate that the molecules may have larger first hyperpolarizabilities when the molecules have stronger and more donors and acceptors, large asymmetry of HOMO and LUMO, better coplanarity and higher accentricity. This work attemps at finding out the relationship between the structure and the property, thus providing theoretical basis for designing nonlinear optical molecules.

进一步研究体系中取代基的位置，给体与受体的数量和得失电子的能力，分子的共面性和对称性对分子第一超极化率的影响，结果表明，有机分子拥有更多数量与更强得失电子能力的给体和受体，最高占据分子轨道和最低未占据分子轨道空间分布的不对称，具有较高的原子共面性和较低的分子中心对称性，都能显著增加

A theoretical model for calculating the cutting angle with different crystal planes, orientations and tool orthogonal rakes are described in this paper. It is built with the ultra-precision cutting model by the principle of the maximum specific energy of shear deformation and the mechanism of change of the shear modulus with...

本文利用剪切变形比能最大及单晶材料不同晶面晶向剪切弹性模量不同的原理，结合超精密切削模型，从理论上计算出不同晶面、不同晶向及不同刀具前角超精密切削条件下的剪切角，得到其在不同切削条件下的变化规律，并由此解释了切削加工中由KDP晶体各向异性所导致的工件表面粗糙度的各向异性。

In the shape analysis of stress surface contour of 3D footprint, the consistency of datum plane cannot be strictly controlled, so a descriptor insensitive to perspective transform is needed.

在立体足迹的重压面边界围线的形状分类和识别中，由于不能严格控制基准面方向的一致性，必须采取对透视变换不敏感的描述方法。

CJX2-d The operating mechanism is direct operation type ,the comtact has double comtas;Combinatiom function,exce pt the imstallation side,the rest of the sides can be added with auxiliary comtact group(F4-d) or interlocking mech anism; The head can be equipped with auxiliary contact group (F4-d)or (F4-d2) or air delaying comtact (sk2-2/3d);The coil wiring terminal can be connected with time delayer and so on function modules.

CJX2-d动作机构为直动式、触头为双断点；组合功能、除安装面外，其余各面均能加装附件；两侧可加装辅助触头组（F4-d）或联锁机构；上方可加装辅助触头组（F4-d）或（F4-d2）或空气延时头（SK2-2/3d）；线圈接线端可加装时间延时器等各种功能模块

Based on hexahedra vector finite element in ANSYS,a new orthogonal-reinforced hexahedra vector element is created by modifying vector basis functions.Due to orthogonality of sampling nodes and orthogonality of integral simultaneously,the new vector element can strengthen diagonal elements' predominance and quicken speed of solving system question group.

在ANSYS采用的六面体矢量单元的基础上，对矢量基函数作了一些增强正交性的修改，使其同时具备采样点正交性和积分正交性，得到了一种新的正交增强六面体矢量单元；这种新单元能增强系统矩阵的对角占优特性，加快系统方程组的求解速度。

It is revealed that the maximum refractive index modulation coincides with the widest band gaps and the optimum volume fraction of the atoms is structure independent. The photonic bands of the face centered cubic ...

文中还计算了由各向异性介电小球构成的面心立方结构的光子能带并看到了禁带，这与各向同性介电小球构成的面心立方结构很不相同。

The new geoid can provide an alternative and cost-effective method to third order levelling specifications and for many scientific applications.

新的大地水准面能提供一种可选且有成本效益的第三类大地水准面规范，它可用于许多的科学研究。

The structures and stabilities of the ground-states for Cu13-nAgn clusters have been studied by Gupta model potential based on tight binding second moment approximation in combination with a genetic algorithm. It is found that the lowest energy structures of the pure clusters (n=0,13) are perfect icosahedron, and the structures for the bimetallic clusters (n=1～10) have stable structure which are slightly deformed with respect to the perfect icosahedron, The Cu atom prefers to occupy the center of the clusters with higher coordination numbers.

在混合团簇基态结构优化的遗传算法方案中增加了交换算子，结合Gupta紧束缚模型势研究了Cu13-nAgn团簇的最低能量结构，选择合适的交换和杂交概率，可有效地提高优化效率，优化结果表明，Cu13和Ag13是全对称的二十面体，n=1～10的混合团簇能形成稳定结构，其构型是在二十面体基础上发生畸变，Cu原子趋于处在团簇中心，随着Ag原子数目的增加，原子间的平均距离单调增加，团簇的结合能单调减小，Cu2Ag12和CuAg12只存在亚稳结构。

In this method, stability safety coefficient is derived from th e ratio fo internal energy to external energy and the minimum disturbed energy e quivalence surface is established, which can be used to determine the potential sliding surface.

该方法不仅从能量的观点给出了基于增稳内能与失稳外能比值的稳定安全系数，还将干扰能量法与等值面法结合起来，建立了用最小干扰能量等值面来确定潜在滑动面的方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。