扩展

Another MCU, 89C2051 is used to realize the control of the three rows LED monitor showing coordinates of axis X and Z axis and other state of the system. Charnel A and C of 8155 are used for editor keyboard, which make the inputting or editing of the NC code and data possible. Charnel P1 of 8031 is used for the operation keyboard such as system power on/off and movement of axis X or Z. a programmable parallel I/O chip, 8255, is used to achieve system I/O and the transmission of other information. In summarize, the system developed is characterized by its simplicity, low development cost and high reliability.

在CPU存储器扩展电路设计中， CPU选用MCS-51系列的8031单片机，外扩32K的程序存储器和 8K的数据存储器，分别用于存放系统管理程序、数控加工程序以及运算数据；在显示电路设计中，选用MCS-51系列的89C2051单片机作为从CPU，控制三排LED显示器，用于X轴、Z轴动态坐标以及相关数字的动态显示；在手动键盘和编辑键盘设计中选用8155芯片的PA口和PC口作为行、列母线，扩展矩阵式编辑键盘，用于程序和数据的输入或编辑，同时选用8031单片机的P1口扩展手动键盘，用于系统启动、停止以及运动部件在X、Z轴方向的手动控制；在I/O口扩展电路设计中选用8255芯片扩展输入输出口，用于接收和传送开关量及相关信息。

Based on basic concept and model,this paper points out that equal attention should be paid to"circle expanding model"and"exclave expanding model".

在城市土地扩展基本理论模式基础上，提出西安市以圈层式和飞地式扩展并重的基本理念，即今后相当时期，城市扩展在挖潜的前提下，应以圈层扩展和飞地式扩张并重，近期以前者为主，远期考虑以后者为主。

The extended order is human spontaneity cooperation. All actions of the enterprise are around the extended order. The inner institution of enterprise is the microcosmic embodiment of the extended order.The enterprise institution that depends on the exterior compulsory power has no long-last vitality.

扩展秩序是人类自发的不断扩展的合作秩序，企业所有的活动都是围绕着扩展秩序展开的，企业内部的制度也是扩展秩序在微观上的体现，靠外部强制力催生的企业制度没有长久的生命力。

Furthermore, the theory foundation and analysis method are put forward. We use optical extent to analyze the system. The change of optical extent, caused by arc length of light source and reflective bowl attached the light source, is analyzed in detail. Moreover, the light output by optical extent curve of light source with reflector is measured by experiment. Base on the analysis and experiment, four hypothesis are put forward to construct the true model of light source.

文中采用光学扩展量对系统进行评价分析，研究了光源经冷反光碗输出后的光学扩展量以及光源弧长与扩展量之间的关系，并测试了实际光源光学扩展量与能量分布的关系，在实验基础上提出光源模型的四点假设，建立实际体光源模型及冷反光碗模型，使系统的模拟仿真具有最大的可靠性与真实性。

On the research of the propagation of the fatigue crack in the past 10 years, Paris and Zheng-hart have developed good formulas of the propagation of the fatigue crack of metal , but of which only describe the process of the propagation of the fatigue crack.

在近几十年对疲劳裂纹的扩展的研究中，Paris和Zheng-hirt对金属材料疲劳裂纹扩展的研究给出了很好的扩展表达式，但都是对疲劳裂纹扩展部分过程的描述。

Considering multiple expansion objectives (including minimizing the aggregate expansion cost and maximizing the degrees of successfulness, compatibility, and uniqueness), the purpose of this study is to design an effective expansion process to help a firm in expanding the benefit sets to fully satisfy the consumer's needs. The work presented in this paper is different from previous studies in practical situations and applications.

本研究之主要目的，即是在考量多个扩展目标（包括追求成功程度、相容程度、独特程度之极大化，及扩展成本之极小化）下，设计能力集合之有效扩展过程与方法，帮助厂商有效地扩展其优势特性集合，以满足消费者真正的需求。

About the theory of the model errors, there are many theoretical problems to be solved, and many disscusional fields to be expanded and perfected.

但是测量平差中的模型误差的理论还有许多问题有待完善、扩展、深入，如函数模型可扩展到附有条件模型、概括函数模型、非线性模型；随机模型可扩展到相关、秩亏等情况；误差理论可扩展到线性近似误差。

The result shows that urban landuse growth in Wuxi City has distinct phase character since 1978, which reflects the course of urban development and maturily. Owing to the diversity of local nature, traffic, society and economy condition and the leading of policy, spatial distribution of urban construction landuse growth in Wuxi City has distinct diversity and strong centripetalism. The central city landuse growth has distinct leading direction at different period of time. And the central city has so strong attraction and radiation force to the market towns that dominate the direction of landuse growth of the market towns scattered around a certain distance.

研究表明：改革开放以来，无锡市城镇建设用地扩展具有显著的阶段性，用地扩展模式反映了城市发育、成长乃至成熟的历程；自然交通、社会经济条件的差异以及政策的引导，无锡市城镇建设用地扩展的空间方位差异显著，具有较强的向心性，主城区不同时段扩展的主导方向明显，对其周围集镇具有强大的吸引力和辐射力，它主宰着周围一定范围内集镇用地发展方向。

Result Biphasic electrical field pulse extended the APD longer than that with monophasic one.

结果 双相电场脉冲比单相脉冲更多地扩展细胞的动作电位时程；不同强度的双相波电场脉冲，对动作电位时程的扩展能力非常相近，而不同强度的单相波对动作电位的扩展能力差别很大，电击后动作电位时程空间分布不均匀；动作电位的扩展主要取决于脉冲强度的峰值，和脉冲持续时间关系不大。

The coarsened structure perpendicular to primary crack plane exhibits better propagation resistance than that parallel with primary crack plane, but it seems that crack propagation property at high temperature can not be improved by changing γ′precipitates morphology.

颗粒形态不会改变裂纹扩展路径及微观机制，粗化结构的疲劳裂纹扩展阻力随温度升高而降低的趋势比原始结构剧烈，同时与主裂纹面垂直的粗化结构具有比与主裂纹面平行的粗化结构更好的疲劳裂纹扩展抗力，但通过改变γ′形态似乎不能改善高温下裂纹扩展性能。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。