原理

The main routes of this graduation thesis is to compile uniformity gradient or MTF software 、match for the quality of digital cameral image the last of digital images and give a comprehensive evaluation for the digital image in discussion the basic principles of digital mapping cameras and digital camera-image quality evaluation.

本次毕业文的主要研究内容是在讨论数码航摄仪的基本原理和数码航摄仪影像质量评价的基本原理上，编写均匀梯度和MTF软件对数码航摄仪影像质量进行匹配，最后对数码航摄仪影像进行综合评价。

In 1990 Carl Zeiss Oberkochen introduced the "20x60 S" binocular; this employed a Zeiss developed, revolutionary "cardanic" dampened stabilization mechanism that does not rely on electronic or hydraulic mechanisms.

1990年，上科亨西蔡推出了&20x60 S&型双筒望远镜；此镜应用了蔡司研发的革命性&万能&减震增稳原理，而没有依赖任何电子或液压原理。

Firstly, the article introduces the definition of error of lens center in the old and new national standard, and summarizes three present systems that can confirm the lens center. Then we discuss the theory and formula of self-collimation catoptric method. On the basis of self-collimation theory, some apparatuses were designed (including internal-focusing center scope and center error measure instrument etc).

首先介绍了新旧国家标准关于透镜中心误差的定义，归纳和总结了目前物镜装校定中心的三个体系，讨论了光学系统中心误差自准反射法测量原理、公式和测量方法，以及根据自准反射法测量原理而设计开发的定中心仪器——内调焦定心仪、中心偏测量仪等设备。

The thesis introduces the theory of optical design of collimation indicator.

介绍了瞄准指示器的光路设计原理，着重讲述分光镜的设计原理，并对干涉场光强分布进行了简单推导，给出了瞄准测量的判断依据。

According to the basic principle of self-balanced pile test method and the conversional simplified conversion method , the pile bearing capacity between the equivalent loaded piles and self-balanced piles were compared .

根据自平衡测试法的基本原理，在传统简化转换法的基础上，通过等效受压桩和自平衡试桩上下桩段受力情况的对比分析，研究了负摩阻力对自平衡测试原理的影响，推得了桩承载力和位移的转换公式。

In this paper,based on the convolutional codes,it analyzes the principle of error-correcting codes.

在现代数字通信系统中，纠错编码技术的作用是很重要的，本文以卷积码为例，分析了纠错码的原理，并利用matlab实现了卷积码的编码和解码，对卷积码纠错原理进行了仿真研究。

It introduces a kind of novel loading test system, based on the operation principle of damper. this loading system is operated by the driving motor. it realizes the loading, in that the damper has a negative drive force that puts on the motor. Based on the ordinary electromagnetic damper, the thesis presents a novel hybrid excitation electromagnetic damper which has adjustable work characteristic, analyses the working principle and structural feature of the electromagnetic damper, deduces the formulas to calculate the eddy current density through the Electromagnetic theory, analyses the distribution of the eddy current in the cotyloid rotor, and also studies the method of calculating the damp torque, establishes the mathematical model of the electromagnetic damper, analyses the relationship between the electromagnetic damper structural parameter and damp torque, researches the engineering design and analysis method of the electromagnetic damper, provides theory foundation for the design and analysis of the electromagnetic damper, contrives a hybrid excitation electromagnetic damper that satisfies the target request, designs a set of compound excitation electromagnetic damping loading control system whose control core is AT89C51 monolithic integrated circuit, analyses the electric circuit part, and carries on the experimental test to this set of electric circuits. Finally it debugs this electromagnetic damping loading system, this system satisfies the target request proposed.

论文提出了一个全新的加载测试系统种类，该加载系统是在阻尼器工作原理基础上，利用电动机拖动阻尼器运转，从而阻尼器产生一个与运动方向相反的阻尼力矩，该力矩作用在电动机上实现对电动机加载测试；同时，论文在一般电磁阻尼器基础上提出了一种新型的可调式复合励磁电磁阻尼器结构，该种阻尼器的工作特性在一定范围内可进行调节；论文分析了电磁阻尼器的工作原理和结构特点，运用电磁场理论分析推导了电磁阻尼器的涡电流密度公式，分析了涡电流在转子杯内的分布图，并对阻尼力矩计算方法进行了研究，建立了电磁阻尼器的数学模型，分析了电磁阻尼器结构参数和阻尼力矩之间的关系，对电磁阻尼器的设计和分析方法进行了研究，为电磁阻尼器的工程设计建立了理论基础；设计了满足技术指标要求的复合励磁电磁阻尼器和一套以AT89C51单片机为控制核心的复合励磁电磁阻尼加载控制系统，对该控制系统硬件电路各部分进行了分析和设计，对软件进行了设计，并对控制电路进行了试验调试，该系统满足所提出的加载指标要求。

Diatomaceous earth was hydrophilic filler and its mechanism of action was distribution principle.

硅藻土属于亲水型填料，其作用原理为分配原理。

In this paper the photoelectronic dynamic measuring principle formeasurement of swinging angle and displacement of swinging center ofswing object with displaceable swing center is described.

本文阐述了用于测量物体摆角及摆心浮动量的光电动态实时测量原理，以及根据此原理研制的光电导弹喷管摆角动态测量系统。

No matter the principle of relativity from Einstein's Relativism, Heisenberg's Uncertainty Principle, Bohr's Complementary Principle and Prigogine's Dissipativity Structure, they all tell us that, we can not exclude the human's existence in nature and the important role people play in nature as well.

无论是爱因斯坦的相对论、海森堡的测不准原理，还是玻尔的互补原理、普利高津的耗散结构，都告诉人们，我们不能排除人在自然科学中的存在，不能排除人在自然科学中的重要作用。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。