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Many of these pathogens to cause great harm economically important crops, the annual global crop losses amounting to 200 billion U.S. dollars. 20 beginning of the century plant virology research focused on the field of plant pathology, with the development of society and scientific and technological progress, as well as new technologies, the continuous application of new methods, virology, the development of an entirely new look.

这类病原物给很多重要经济作物造成巨大危害,全世界每年农作物的损失达 2 0 0亿美元。2 0世纪初对植物病毒学的研究主要集中在植物病理学领域,随着社会的发展和科学技术的进步,以及新技术新方法的不断应用,病毒学发展焕然一新。

New Weapons and Combat System - New deadly weapons such as the Cestus — powerful metal gauntlets with devastating strength — and other brutal instruments of war that will allow Kratos to learn ruthless new techniques such as grappling with enemies and launching explosive wall-to-ground attacks.

新的武器和作战系统-新的致命武器,如拳套-强大的金属护手造成破坏性的力量-和其他残酷的战争手段,让奎托斯无情学习新技术,如擒拿与敌人和发动爆炸墙到地面攻击。

Last year of Tang Jun find new job the happening that disturbance has compared event of this mainer finance and economics early as more is forgotten by people, but to choosing to appear on the market from the United States company royal group finds new job company of domestic civilian battalion is new China, 2009 bound of this finance and economics tighten look one of chatelaine year, this choice appears much the imply of an adventure.

去年唐骏的跳槽风波早已经随着更多比这个更重要的财经事件的发生被人们淡忘,但是对于选择从美国上市公司盛大集团跳槽国内民营企业新华都,在2009年这个财经界都勒紧了腰带的一年看来,这个选择似乎又多了一份冒险的意味。

It has multiterm production lines including coccidium vaccine production line, Herbal extract production line, API synthesis production line, powder production line, premix production line, Small volume injection production line, oral liquid production line and disinfectants production line, and so on. It has more than 100 products of 8 Series. We ivested eight million yuan to build a new live coccidium vaccine production workshop in 2008. The new live coccidium vaccine has been declared to national new veterinary medicine Evaluation center and in clinical trial stage.

拥有球虫疫苗、中药提取、原料合成、粉剂、预混剂、散剂、小容量注射液、口服液、消毒剂等多条生产线,现有产品八大系列100余个品种。2008年投资800万元在亚宝生产基地新建一座球虫活疫苗车间,并取得了GMP证书(证书号:(2009)兽药GMP证字185号)和生产许可证(证号:(2009)兽药生产证字04034号),球虫活疫苗已报国家新兽药评审中心,现已进入临床试验阶段。

It's application methods on developing new machine tools with virtual design are investigated, systemic process from conceptive design, modeling digital prototype to examine design quality by simulation are summarized, also a new way to innovate a new machine is put forward in the thesis.

论文探索了虚拟设计技术在机床新产品开发的具体应用方法,总结了从概念设计、建立数字样机到评价考察设计质量的虚拟仿真分析整个过程的系统化技术,为机械产品的创新提出了新的思路。

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。

Based on these researches, according to the new requests of county highway network planning and construct that caused by New Socialist Countryside Construction, thesis takes some new research on the basis of analysing the conventional country highway network planning methods, improves the veracity of crunodes by using amendatory crunode important degree model, then founds county highway network planning layout and grade optimization model to improve the scientific of highway network planning, it also gives an evaluative of county highway network by using network power fuzzy connectivity method.

基于上述研究,结合社会主义新农村建设对县乡公路网规划建设的新要求,文章在对传统县乡公路网规划方法分析的基础上对其进行了新的探索,运用改进的结点重要度模型提高了结点选择的准确性,进而通过建立县乡公路网规划布局和等级优化模型而提高了县乡公路网规划的科学性,并应用路网加权模糊连通度评价方法对县乡公路网规划进行评价。

With curvilinear regression analysis we can prove that the result of the new approach is high correlation with MTF measured by optical instrument, in other words, the new method is sensitive to the change of image definition. When compared with traditional method, the result of analysis can also show that the new method is better than traditional method, such as entropy, to assess gray scale digital image definition.

目前 ,对数字图像清晰度的评价方法主要有空域参数方差、熵以及频域调制传递函数MTF等,但由于这些方法各有优缺点,如空域参数虽评价简洁、快速,但对图像清晰度的细小变化不敏感;频域参数虽对图像清晰度变化敏感,但计算较慢,不宜程序运算的自动化。

Traditional sports teaching method,already could not adapt the new times sports curriculum to reform; this article means which through the literature law, the questionnaire investigation law, the cut-and-try method unifies, carries on the comparison to the traditional each sports teaching method, discovered the sports competition teaching method can adapt the new times student sports demand; the competition teaching method is unifies the traditional teaching method in the foundation one new teaching method, proved through the experiment, its teaching effect is good.

一些传统的体育教学思想、教学理念、教学方法、教学模式已经不能够适应现代教学的需要,在此过程中,为提高教学质量,就必须对教学方法进行改革。作为体育教学,如何进一步转变体育教育思想,深化体育教学改革,摆脱旧的传统的教学体系、思想体系和理论模式,逐步形成一个新型的,具有中国特色的教学过程和教材体系,使我国体育教学面向未来社会的需要,跟上21世纪学校体育发展的需要,是本文探讨和研究的问题。

They pay more attention to new knowledge and new things, which bring cyberculture into campus, and give rise to a new culture form, campus cyberculture.

正是他们对新知识、新事物的敏感和关注,使网络文化渗透到校园,并迅速与校园文化融合形成一种新的文化形式——校园网络文化。

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推荐网络例句

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了

The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.

世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。