工作值

In this thesis, we will mainly do research on the novel scheme for Digital image Steganography, Digital Image Secret Transmission in network and the development of the information hiding device for application. The main contributions of this thesis are as following: The novel conversion method for mapping image to complex number is proposed, and the plus, minus, multiply and complex conjugate operation of image are defined based on Positional number systems and complex number system. Following new results have been gotten: 1 The suitable complex number basis to be used to express integers is a big set. 2 Any image can be mapping into a one-to-one point. 3 Lots of image processing problem can be considered based on geometric theory.

在本论文中，研究工作集中在数字图像伪装算法的新模型、图像在网络中的加密传输的新方案和信息伪装设备的研发等三个方面，主要包括：基于位值制记数法和复数系理论，提出利用复数作为基底的数字图像新的表示方法，用复数运算定义了图像和图像间的"加"、"减"、"乘"、"共轭"等运算关系；得到理论结果： 1、能表示任何整数的复数基是很大的一个集合。2、任何一幅图像，都能和复平面上的一个点一一对应。3、可以将图像问题化归为平面几何问题处理。4、复数系下的图像表示适合用于信息伪装。

Established the mathematical optimization model of the main parameters of the jaw crusher with a compound pendulum for the goat of the minimum stroke ratio, optimally design the jaw crusher with a compound pendulum .

建立起复摆鄂式破碎机工作机构主要参数的优化数学模型，以最小行程特性值为目标，采用复合形法对复摆鄂式破碎机进行了优化设

For instance,(1) mountain terrain map: displaying the terrain and topography, is 3D emulation of earth's surface, is convenient for customer to look into the physiognomy, and check the data of input;(2) contradistinguish map of mine well: displaying opposite position relation of the earths surface and workface, user can analysis surface movement and distortion value at every positions of the workface with the map;(3) 3D prediction model: displaying workface, survey dots, survey lines, terrain, movement and distortion in a same map with 3D graphics, revealing the relations of every elements' position;(4) isoline graphics: displaying the value of height, subsidence, incline, movement and distortion with different colors, and giving the value of every color at the side of the map;(5) color cloud diagram: revealing every targets with colors, coloring every point in the map with the color corresponding the value of height, subsidence, incline, movement and distortion and form transitional color in color cloud diagram.

通过井上下对照图，用户可以分析工作面的各个位置的地表移动变形值；（3）三维的预计模型：采用3D形式同时显示工作面、测线、测点、地表地形、地表移动及变形，显示了各要素的空间相对关系；（4）等值线：对地表高程、下沉、倾斜、曲率变形、水平移动和水平变形等各个分量以等值线方式显示。

In view of the tedious and mistakable manual calculation in measuring Gauss projection,coordinate zone transformation and meridian convergence,an itera-tive approximation method is adopted and programmed by BASIC to imple-ment the direct and converse calculation of Gauss projection and computer cal-culation of meridian convergence angle.

针对测量工作中人工进行高斯投影、坐标换带和平面子午线收敛角计算非常麻烦又容易出错的问题，采用迭代法趋近求值，用BASIC语言编制了相应的计算机程序，实现了上述计算。

Wensleydale Creamery marketing manager Sandra Bell said:"We are delighted with the work of Smurfit Kappa Composites. They have delivered a practical pack with real on-shelf presence."

wensleydale creamery营销经理桑德拉贝尔说："我们很高兴与工作的斯莫非特Kappa值复合材料，他们发表了切实可行的包与真正的对现成的存在"。

In this paper, a switch power circuit is given as an example to introduce how to confirm the minimum clearance and creepage distance with working voltage on different safety standards.

今以一开关电源电路为例，介绍在不同标准下如何根据工作电压情况对最小电气间隙和爬电距离值进行确定。

The main job and contribution of this paper are as follows:Based on narrowband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, compute the cross-correlation function of FH signals from multichannels, then we get the cross power spectral density matrixCSDM Secondly, select the hops of FH signals from the CSDM via processing and analyzing the CSDM, meanwhile reduce the influence coming from noise, fixed frequency signal and other interferences; Lastly, estimating the DOA of every hop and according to the DOA, we can separate the hops, get the number of FH signals and their parameters. Propose a new method for designing the threshold in FH signal detection. This method makes it easy to get the threshold by theoretic computing and it can extremely reduce the interference of non-FH signals.Based on broadband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, get the DOA of the signals by wideband spatial spectrum estimation; secondly, separate the signals by spatial filtering using wideband beamformer; Lastly, we propose two methods for FH signal blind detection and blind parameter estimation, one is for several constant hop-rate FH signals whose dwell-time are different and another is for a single FH signal whose hop-rate is alterable.By employing spatial interpolation in broadband signal beamforming, it can reduce the number of antenna elements and corresponding RF modules, A/D converters, etc. It can also eliminate the mutual coupling between antenna elements while getting the narrower main beamwidth and lower sidelobe level.

本文的主要研究工作和贡献如下：●提出了一种基于窄带处理的FH信号盲检测和参数盲估计的实现方法，即首先求出多路信号之间的互相关，进而得到互功率谱密度矩阵，然后通过对CSDM进行对折处理来抑制噪声、定频信号及其他干扰的影响，并将所有属于FH信号的hop(每一跳的驻留时间在时频图上持续的线段)从CSDM中筛选出来，最后用阵列信号处理中的到达方向估计理论在频域中估计出各个hop的方向参数，利用方位信息完成FH信号分离并得到FH信号的数目及其各自的参数集；●提出了一种确定FH信号检测门限的策略，该策略不仅使得检测门限能够通过理论计算得到，而且还显著地抑制了非跳频信号的干扰，从而能有效地检测出FH信号；●提出了一种基于宽带处理的短波FH信号盲检测和参数盲估计的实现方法，即首先利用宽带空间谱测向技术得到接收信号的DOA，然后采用宽带波束形成技术对特定方向进行空间滤波，实现多个信号的分离，最后分别提出了两种FH信号的盲检测和参数盲估计方法，第一种方法适用于空间某个特定方向上存在着几个驻留时间不同的恒跳速FH信号和其他干扰信号的混合信号，第二种方法适用于空间某个特定方向上仅含一个可变跳速的FH信号和噪声的混合信号；●将空间插值的概念和宽带波束形成技术结合起来，提出了一种基于频域处理的宽带恒定束宽的波束形成方法。

The apparatus use Lm336 as constant voltage source, and it been converted to constant - current source by amplification, which provide current for the Hall probe. The non-idiostatic offset circuit use the bridge method to offset the circuit. So while the magnetic density is null, the output voltage of Hall probe is null too.

仪器采用恒压源经过放大器转换为恒流源，为霍尔探头提供工作电流；不等位电势补偿电路采用桥式补偿网络，补偿电压通过调节可变电阻获得，实现霍尔电势的幅值补偿，使外磁场为零时，霍尔探头输出电势为零；磁通电路主要提供对样品的磁特性测量，它由测量线圈和积分器组成。

We do a good job in every item carefully, work at production with special care, cutely manage strictly in the quality, operate prudently in the business, exploit seriously in the market, serve excellently in the service, strive to make that each product can bring value experience to the user and constantly meet the high quality of life .

我们认真做好每一项工作，在生产上精雕细刻，在质量上严抓细管、在经营上精打细算、在市场上精耕细作、在服务上精益求精，力争使每一件产品都能给用户带来物超所值的体验，不断满足用户对高品质生活的追求。

Aiming at bottom roof caving and support impact problems induced with abrupt large scale caving upper roof in face 21303 of Daliuta mine, this paper put forward the motion parameter at roof caving and calculation formula of roof shear breaking force with the help of theorem of momentum, theorem of moment of momentum and D' Alembert principle. Roof caving process was simulated by Ansys Ls-DYNA program, and maxim impact force was got. The theoretical research outcomes in the paper were applied in face 21303 of Daliuta mine, and were accordant with actual observing status of roof caving process.

针对神东煤炭公司大柳塔煤矿活井21303综采工作面，上层采空区顶板突然大规模垮落对下层顶板及支架的突然冲击问题，文章采用动量定理、动量矩定理、达朗伯原理推出了顶板垮落瞬间的运动量及顶板切顶垮落所需要的剪力值计算公式，用ANSYS LS-DYNA程序对顶板垮落过程进行了数值计算，得到了最大冲击力，在大柳塔煤矿活井21303综采工作面对顶板垮落特征进行了实际观测和理论成果验证。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。