原理

The beautifully colored wings of African swallowtail butterflies manipulate light using engineering tricks similar to those found in digital dis

科学家发现，非洲燕尾蝶漂亮的双翅处理光线的原理竟然与数码显示器的原理相类似。

According to the theory of Sagnac FourierTransform spectrometer, the method which we used to reconstruct the spectrum correctly from the captured interferogram was developed. With the steps of trend term correction, apodisation, phase correction and conjugate symmetrization applied to the interferogram captured and then reconstructed it, the error was avoid.The experiment to reconstruct the spectrum of monochromatic light source such as Helium lamp used in the developed prototype was carried out. The results agree with the nominal spectrum distibutions of the sources with the accuracy of 4nm.

介绍了Sagnac型干涉成像光谱仪基本原理，针对上述问题得到一套对采集得到的干涉图进行光谱重构的方法，通过对所采集干涉图进行消趋势项、切趾、相位校正、共轭对称化等步骤的处理，再进行重构，即可有效避免直接重构所带来的误差，使用所研制的原理样机对氦灯等单色光源进行光谱曲线重构实验，得到的光谱强度分布曲线与标称曲线基本吻合，光谱复原精度达到了4nm，具有较好的重构效果。

An engineering approximately design method-equivlent circuit isalso introduced by equilent circuit of waveguide ET-junction and principle of symmetry and of multiplication of matrix.

本文同时依据对称性原理、ET接头的等效电路及传递矩阵的乘积原理建立了波导谐波滤波器的近似工程设计方法——等效电路法，指出等效电路法虽然精度有限、但计算时间很快，可以进行基、谐波全频段分析。

In the process of the developing of NC machine tool which machines the sleeve of synchromesh of automobile ,efficient methods making use of hypocicloide are introduced.

介绍了用摆线轨迹形成原理加工滑块槽及倒锥的工作原理；结合汽车同步器齿套数控加工机床的研发，提出了利用摆线逼近圆弧和渐开线的高效加工方法；并通过建立摆线的参数方程，分析了其各个参数对摆线形状的影响，进而证明了利用这种方法加工同步器齿套的可行性。

According to natural and social attributes of water resources systems, by applying synergistic principle, starting from the state equations of the sustainable development, the river-ocean synergist ic principle in developing water resources of our country in the 21st century is discussed.

给出水资源系统可持续发展的状态方程；运用协同学原理，根据水资源系统自然与社会的双重属性，从水资源系统可持续发展状态方程出发，提出21世纪我国沿海缺水地区水资源开发利用的河海协同原理

The main content of this dissertation includes: 1. Research on the theory of ultrasonic power supply, introduce its development process. On the basis of these, fix on the scheme of medical ultrasonic low-power supply. 2. According to the principle of modularized design, divide medical ultrasonic low-power supply into four parts. They are power amplify circuit, power control circuit, frequency automatic tracking circuit and matching circuit. Separately research on their theories and design their circuits and necessary programs, especially, effectively resolve the problem tracking the supersonic vibration system with a narrow syntony frequency bandwidth and a high swing. 3. The matching experiments gain good result, and prove that medical ultrasonic low-power supply is entirely up to the mustard on intellectualization, wide band of working frequency, steady output and high efficiency.

本文工作的主要内容包括： 1、研究了超声功率电源的原理，并回顾了它的发展过程，在此基础之上确定本文医用小功率超声电源的设计方案； 2、按照模块化的设计原则，将医用小功率超声电源的设计分解为功率放大电路、功率控制电路、频率自动跟踪电路和匹配电路等四个部分，分别研究了各部分的原理，在此基础之上进行了具体的电路设计和程序设计，尤其是有效地解决了对谐振频率带宽窄振幅高的超声振动系统的频率跟踪问题； 3、通过与超声振动系统的各项配合实验，取得了很好的实验结果，验证了医用小功率超声电源完全满足智能化、工作频带宽、输出功率稳定、输出效率高的设计要求。

The managing and booking system, its development that basic information sum structure of beak labor cost superintendence the system is a model to primarily include the creating of postscenium database the sum to support and the front end apply the procedure's development tael the side.

介绍了数据库技术以及WEB数据库技术的背景及Windows NT IIS SQL Server Access ASP系统的一般原理。阐述整个基于WEB数据库技术构建的动态网站的系统结构及工作原理；分析了系统实现中的难点和重点。

Explorations on practice teaching model of mechanism and machine design are made from experiment teaching and technological activity out of class.

从实验教学和课外科技活动等方面对机械原理和机械设计的实践教学模式进行了探索，并将其应用于机械原理与设计的教学中，取得了较好的效果。

Study on Applying CSG Method to 3D Model of Buildings;2. Research of 3D Model on Road Engineering Geology;3. A new kind of stair-climbing vehicle construction based on the structure principle of telemotor vehicle and design feature of micro mobile vehicle for scout as a preliminary research achievement is designed, and its 3D model is created with MDT software.

在预研完成的微小型移动侦察车的基础上，受遥控电动小车构造原理的启发，设计了一种可爬越楼梯的新型的车辆结构，并采用三维机械设计软件MDT完成了三维建模，同时还简要地分析了该车爬越楼梯的力学原理，在一定程度上促进了微小型地面移动机器人技术的研究开发工作。

On the other hand,it is still doubted the understanding of mechanism of compressive stress and distraction osteogenesis,and the testification of its scientific mechanism.

然而在另一方面，人们对张压力效应和牵引性组织形成原理的理解程度，还有就其原理是否已被科学性地阐明都存有疑义。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。