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Based on the work flow of charging equipment, three worst work conditions of the clack box were defined. Then, based on thermal-structure coupled theory, the thermal-structure coupled of the clack box which suffered from mechanical and temperature load was analyzed using the powerful software ANSYS. The clack box's temperature field and stress field as well as the stress spectrum of danger area in actual working condition were obtained. Finally, based on crack initiation and crack extension theory, the clack box's fatigue life was predicted.

摘 要:根据装料设备的工作流程,确定阀箱3种最不利的载荷工况;基于热-结构耦合理论并利用有限元分析软件ANSYS研究阀箱在温度载荷和机械载荷作用下的热-结构耦合问题,得到实际工况下阀箱的温度场、应力场以及危险部位的应力谱;依据裂纹萌生和扩展理论对阀箱进行疲劳寿命预测。

Based on this line of thought, following conclusions are attained: if the seismic design was based on the force method, as long as the power spectra of the model can be close enough to fit the actual average power spectra of the earthquake acceleration records, the model can be used to simulate seismic process; if the seismic degsin was based on the displacement methods, the more stringent constrains should be applied to the power spectra to model.

一个能够正确描述结构在地震作用下响应规律的地震动模型就是一个合适的模型,其他的限定条件并不重要。

Theoretical analysis and experimental results suggest that its coding accuracy based on a N-sized code-book of size N N2 is comparable with that of VQ coding based on a N2-sized codebook,and much better than multi-stage VQ based on two codebooks of size N,while its computational complexity is much lower than the latter ones under equivalent accuracy obtained.

理论分析和实验结果表明:码书大小为N的线上投影法的编码精度与码书大小为N2的矢量量化法相当,并且明显优于用两个大小为N的码书构成的两级矢量量化法,而其码书生成和编码过程的计算复杂度均远远低于后者。

This thesis based on the development of heilongjiang ' s green foods , through a large amount of collection and arrangement , to analyze the opportunity of development , some objective problems , course and present condition of heilongjiang ' s green food , point out the countermeasure of development of heilongjiang ' s green food . the thesis is divided into five units : unit 1 analyzes the definitions and characters of green foods , standard and signs of green food . the advantage which green food have and the significance of green food ; unit 2 analyzes the development course and present development situation of heilongjiang ' s green food based on analyzing the starter and development situation of our country , heilongjiang ' s green food past ten years , more work goes before in our country ; unit 3 analyzes the questions required dealing with which exists in development of heilongjiang ' s green foods , it indues that think is too late , the scale is too small , the way of sell is late and false is too much more ; unit 4 draws a conclusion that there is nice chance of developing green food in heilongjiang , based on using a large amount of data ; the last unit provides the ways to turn think , stronger big factories , make the sell way is more than before and draw the lay fastly , and provides appropriate countermeasures to develop heilongjiang ' s green food further i n a healthy way

本文共分五章,第一章在分析了绿色食品的概念与特点的基础上,对绿色食品的标准与标志进行了界定,并明确规定了绿色食品必须具备的条件,提出了发展绿色食品的意义;第二章在分析我国绿色食品的起步与发展概况的基础上,对黑龙江省绿色食品的发展历程和发展现状进行了分析,黑龙江省绿色食品产业经过十多年的努力,呈现了全省合力抓绿色食品,健康快速发展的好势头,并且许多工作都走在全国的前列;第三章从实证着手,分析了黑龙江省绿色食品发展中存在思想观念滞后、品牌杂、经营销售方式落后、假冒现象多等若干亟待解决的问题;第四章运用大量数据,得出黑龙江省发展绿色食品的良好机遇,为黑龙江省绿色食品的发展提供了广阔的发展空间;第五章针对黑龙江省绿色食品发展中存在的问题提出了转变传统观念、壮大龙头企业、抓好市场营销、加强绿色食品法规的制定等相应的对策,并对黑龙江省绿色食品的进一步的健康发展提出了新的思路。

After analyzs the key elements in social agents, sets up negotiation model among social agents based on argument, and sets up relative decision funciton; then based on the hypothesis of relative datum, analyzes the validation of the model and decision function through relative calculations with an nagetiation example of social agents in multi-agent society, and makes a simulation of its argument dialogue about this example based on defining the locutions of relative negotiation.

通过对Agent间存在的有关社会性的关键元素进行分析,建立了基于辩论的社会性Agent间的谈判模型,并建立了相关的决策函数;然后通过一个存在于多Agent社会中而具有社会性的Agent间的谈判实例,在假设了相关数据的基础上对模型和决策函数进行了举例计算,分析验证了其有效性,并在对相关的谈判原语作出定义的基础上对此谈判实例的辩论对话过程进行了模拟。

First, the stations'timing process and the slot aligning are discussed. Second, the dissertation propose a resource request random access method based on feedback. The performances of this method are analyzed. Third, proceed from the considerations of the MAC protocol for the HFC system, a QOS-oriental scheduling algorithm for the MAC protocol based on dynamic TDMA is proposed. Simulation results show that the performance of this algorithm is better than that of the first come first service. Forth, two contention resolution algorithms ----p-persistent CRA and tree CRA, which are usually adopted in the HFC system, are summarized. The delay and characteristic are compared. At last, the dissertation introduces the function implementation of the MAC layer based on COM21 UPSTREAMS.

首先,讨论了基站的同步进程和时隙同步的实现;然后,本文提出了一种带反馈模块的资源申请信号随机接入方法,并对其进行性能分析;然后,从HFC系统的MAC协议出发,提出了一种用于基于动态TDMA技术的MAC协议的业务安排算法,计算机仿真结果表明其性能优于先到先服务法的性能;然后概述了常用于HFC系统的两种冲突解决算法——p-坚持冲突解决算法和树型冲突解决算法,比较两者的时延性能与特征;最后,介绍了基于COM21 UPSTREAMS协议的MAC层功能实现,给出了硬件框图和照片。

To increase the security of the watermark, a new binary image encryption algorithm based on TD-ERCS map is presented. The watermark is encrypted by a chaos sequence generated by TD-ERCS map; A novel color image watermarking algorithm is proposed based on discrete chaotic map and 2-dimensions discrete wavelet transform. The watermark is encrypted by the new binary image encryption algorithm, and the encrypted watermark is embed into four sub-bands of the most deep level of blue branch of host image by three-level wavelet transform, and the embedded positions are determined by general cat cha otic map; A novel color-image blind detection watermarking algorithm is proposed based on integer wavelet transform and subsampling. The scrambled watermark is encrypted and embed into the low sub-bands after four sub-images of the Y branch of host image is transformed by two-level wavelet transform, and the embedded positions are determined by Logistic chaotic map, this watermarking scheme can realize blind extraction.

为了提高水印图像的安全性,提出了一种基于TD-ERCS混沌映射的二值水印图像的加密算法,该算法利用TD-ERCS映射产生的混沌序列加密水印图像;将离散混沌映射和二维离散小波变换相结合,研究了彩色图像水印新算法,该算法先对混沌序列加密后的水印图像进行小波变换,再嵌入到宿主图像的蓝色分量的最深层的四个子带中,嵌入位置则由广义猫映射确定;将整数小波变换和图像子采样技术应用于数字水印,提出了一种彩色图像盲提取水印算法,水印嵌入时,先对宿主图像在YIQ色彩空间中的Y分量进行子采样,并对得到的四个子图像分别进行二级离散小波变换,然后将置乱并加密后的水印图像嵌入到小波变换后的低频子带中,其嵌入位置由Logistic混沌映射产生的混沌序列确定,实现了水印的盲提取。

Slipform assembly prior to checks based on the actual location, size and design drawings of the location, size deviation (based on the design of the center coordinates of the displacement of ≯ 15mm, based on population Cup Neijing Neijing error of not more than 1%).

滑模组装前,先检查基础的实际位置、尺寸与设计图纸的位置、尺寸偏差(基础中心点对设计坐标的位移≯15mm ,基础杯口内经误差不大于内经的1%)。

The innovation of this paper can be explicated as the following:First, based on the spatial concepts of cadastral feature this paper presents "general block" and "general land parcel".Second, based on "general block" and "general land parcel" this paper presents the urban and rural integrative cadastral management model, and then combined with Geodatabase it introduces design of the urban and rural integrative cadastral database, and based on this the urban and rural cadastral data can be stored in the same database by the same way.

本文的主要工作集中在以下几个方面:第一,在基于地籍要素的空间概念支持下,提出了&广义街坊&和&广义宗地&的概念;第二,在&广义街坊&和&广义宗地&概念的支持下,提出了城乡一体化的地籍管理模型,并结合Geodatabase阐述了城乡一体化地籍数据库的设计,从而真正地实现了城乡地籍数据的统一存储。

The transmission and print system for shunting trip plan is the important part of railway marshalling station management information system, whose first generation is based on the transmission system of IPC and the second generation is based on embedded and dedicated transmission gateway system. Based on this, the paper studies and proposes a system structure suitable for remote maintenance and management and further optimizes the control of information flow.

钩计划传输与打印系统是铁路编组站信息管理系统的重要内容,第一代是基于工控机的传输系统,第二代是基于嵌入式专用传输网关系统,在此基础上,研究提出了适合于远程维护和管理的系统架构,并对信息流控制做了进一步优化。

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推荐网络例句

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。