定向的

Also, the results indicate that it is not necessary to control over the temperature gradient of the undercooled liquid by human beings within the directional solidification undercooling range; and that even single crystals can be obtained by point trigging at the end of the samples.

在定向凝固的过冷度范围内，无需人为控制固液界面前沿的温度梯度，而且，以点触发试样端部，可以获得单晶。

The parameters include waveguide width: 8μm, titanium film thickness:50~60nm, index change: 0.006, diffusion temperature: 1050 and diffusion time: 9~10 hours.Designed and produced a 2 X 2 coupler Optical switch and a 1 X 2 digital optical switch. The coupler optical switch was produced by AP reversal structure, with the main parameters such as total length of switch: 30mm, waveguides center distance: Hum, interaction length: 17mm, and at 17V with a crosstalk of -18dB. The digital optical switch was produced by asymmetry electrode Y branch structure. The main parameters of this switch such as switch length: 25mm, the angle of Y branch: 0=0.1? center distance at branch end: 30μm, the center distance of electrons: 12μm, and at 27V with a crosstalk of 18dB.

设计并制作了2×2耦合型光开关和1×2数字开关，其中耦合型开关主要采用的反转Δβ定向耦合器开关，开关长度约30mm，波导宽度8μm，波导间距14μm，耦合区长度17mm，电极主要采用三电极结构，最终测得对TE模开关电压＜-15，消光比≈18dB；数字开关采用非对称电极Y分叉数子开关结构，利用BPM软件模拟了其开关特性并优化了器件参数，制作中采用的主要参数为：开关长度约25mm，Y分叉角θ=0.1°，Y分叉末端波导间距30μm，电极间距12μm，最终测得开关电压27V，消光比≈18dB。

The ship electric propulsion system that we are going to discuss consists of the following parts: six-phase double Y winding shifted by 30°synchronous motor, diode clamped three-level inverter, fixed pitch propeller and control installment of electric propulsion systems based on air-gap-field orientation vector control.

本论文所研究的船舶电力推进系统各个组成部分分别是：双Y移30°六相电励磁同步电动机、二极管嵌位式三电平逆变器、定距螺旋桨船舶推进器和采用基于气隙磁场定向矢量控制策略的电力推进系统控制装置。

It is possible that domes or long walls may be created independently in the horizontal strata. Thus, synclines and anticline develop in different extent and may be distributed in space with different directions. Nevertheless, some of them may be arrangeddirectionally. Shown in the figure on the right

穹窿或长垣可以弧零零的产出于水平岩层之中，所以向斜和背斜不同等发育，而且空间展布常无一定方向性；有些穹窿或长垣也可稍呈有规律的定向排列。

ABSTRACT Though the directional solidification technology has been extensively used in the fabrication of nickel-base superalloy, there are...

定向凝固技术作为改善材料性能的重要手段已广泛应用于镍基高温合金，而在钴基合金中的应用较少，在国内目前还没有获得实际应用。

The north-seeking system equipped in chariots is the orientational instrument based on this elementary principle.

本课题设计的独立寻北仪便是应用上述基本原理工作的定向仪表。

It belongs to subsystem of thinking regulation and it can direct, control, adjust the solvers whole thinking process.

它属于思维的监控子系统，对解题者的整个思维过程起定向、控制和调节作用。

In order to optimize the shape and size of reamers,the mathematical model for shape optimization of reamers is established.

为优化水平定向钻扩孔器的形状以及尺寸，建立了扩孔器形状优化的数学模型。

The transport of Brownian particles in two-state flashing ratchets composed of two asymmetric potentials with the same period is investigated.

研究了由两个相同周期不对称势垒构成的两态闪烁棘齿模型中布朗粒子的定向输运。

OUTPUT IMPEDANCE CONTROL In order to put all streams in three-state, all per-channel three-state control bits in the Connection Memory are set (MOD0 and MOD1 = 1) or both the ODE pin and the OSB bit of the Control Register must be zero.

输出阻抗控制为了使所有流在三态，在连接所有内存每通道三态控制位设置（MOD0和MOD1 = 1）或两者的管脚和常微分方程的控制位定向结构刨花板注册必须为零。

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