持续地

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。

Use somatostatin after PD can restrain organism excrete diastase vera,and help anastomotic stoma to concrescent and decrease pancreatic leakage;pancreatic leakage should be treated by different grades,grade 1 can be cured by persistent drainage with somatostatin and nutritional support;grade 2 should be pay more energetic intervention.

PD后应用生长抑素持续泵入可以抑制胰酶的作用，使胰肠吻合口较好地愈合，从而有效地减少胰漏的发生；胰漏可进行分级治疗，Ⅰ级胰漏采用通畅引流为主，同时使用生长抑素和营养支持等治疗多可治愈，Ⅱ级胰漏需要积极治疗。

To sit still and observe that one is neither identical with one's thoughts and impulses as they arise continuously and discursively in one's mind, generating desire, anxiety, fear and guilt, nor indeed limited by them, is to be aware of the possibility of controlling one's thoughts and of moving toward a new kind of spiritual freedom.

只有纹丝不动地打坐并意识到自己既没有与内心持续杂乱地萌发着的致使产生欲望、焦虑、恐惧和内疚感受的各种思绪和冲动同一，也确信没有受制于它们时，方能感知到克制自己内心思绪和通往新的精神自由的可能性。

Working steadily on one task over an extended time is a good sign that you were in the creative zone, while rapid shifting from task to task suggests distractedness.

持续稳定地做一件事是个好现象，说明你处于富有创造力的状态，而迅速地更换着做事说明你精力不集中。

This paper reviews the biology characteristic and distributing of the Nostoc commune in China from the viewpoint of Ethnobotany , the alias had been textual researched , and many potential values had been discussed also. At the same time, it also put forward several attitudes and suggests about exploitation

本文从民族植物学的角度出发对我国地木耳的生物学特征及分布、别名考证、潜在的各种价值进行了探讨，并就地木耳资源的开发和利用提出自己的几点看法和建议，以期为地木耳资源的合理利用和可持续开发提供参考资料。

As one releases, embracing the change with ease, moving where one is required to continue to ascend, life will flow with joy, ease, and into greater experiences of freedom and expansiveness.

当你释放，轻松地拥抱改变，前进到你需要去持续提升的地方，生命将欢乐地流动，并进入对自由和扩展的更大体验里。

""A flick through the crime files shows the Asian menace has been steadily creeping up on us.

翻过这一页页的犯罪档案，可以清楚地看见，亚裔所带来的威胁与恐惧感，正持续而稳定地在我们身边蔓延。

The contents of the study on Earth environment and life processes include (1) chemical, physical and biological processes under the interactions between Earth environment and life processes, and the interactions among geosphere, hydrosphere, atmosphere and biosphere;(2)distinguishing the contributions of the human activities and natural processes to global change;(3)evaluating the possible impacts of climatic and environmental changes on life processes and its feedbacks;(4)discovering the adaptation of life processes to Earth environment and its adjustment mechanism.

地球环境与生命过程研究的内涵就是研究地球环境与生命过程相互作用中的各种化学、物理、生物过程，以及其在地圈、水圈、大气圈、生物圈各子系统之间发生的相互作用，增进对地球系统的理解和认识，区分人类活动与自然过程在全球变化中的作用，评估气候与环境变化对生命过程的影响及其反馈作用，揭示生命过程对于地球环境的适应性及其调控机理，为科学地管理地球，确保地球系统的可持续发展提供依据。

As he was running towards her apartment, he kept hearing a roar in his ears:" You must let it go free; you must let it go free."

当他跑向她的寓所时，耳边持续响起一种呼声："你必须让它自由地走；你必须让它自由地走。"

TV broadcasting is an integral part of these creative industries, inextricably-linked with the mass-entertainment film industry, radio, newspapers, magazines, children's toys, electronic games, fashion - with the advertising industry a very prominent "cement" in that structure…They interlock, incestuously perhaps, and provide constant mutual product and programme support.

电视传播是这些创造性产业中的主要部分，它不可避免地与大众娱乐电影产业、广播、报纸、杂志、儿童玩具、电子游戏、时装等联系在一起，而广告业是这个结构中的一种非常重要的黏合剂……它们互相连锁，也许是混乱错杂地交叉渗透，提供持续合作的共同产品和相互支持的节目。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。