查询词典 echo chamber

According to the difference of Doppler spectra of meteor trail echo and clutter of ground and sea, a FIR high-pass filter is designed to filter out clutter and so the meteor trail echo becomes obvious. Then a smart threshold is obtained from the minimum mean of different segments of background noise and used to detect the meteor trail echo. Finally the phase discontinuity of clutter from the meteor trail echo suppression is eliminated by substituting the data at echo positions with clatter.

该文根据地海杂波与流星干扰在多普勒谱上的差别，提出了用FIR型高通滤波器滤除杂波使流星干扰凸显出来；再根据流星干扰的分布特点分段计算背景噪声均值，求取流星干扰检测门限；最后用杂波信号来插值流星干扰位置上的数据，消除因去除干扰造成的杂波相位不连续。

Results 12 cases as abdominal hernia (of which indirect hernia 9 cases, direct hernia 2 cases, femorocele 1 case), ultrasonography shows middle-high echo or linkage heterogeniety echo clumps; 8 cases as hydrocele, Ultrasonogram shows anechoic; 2 cases as cryptorchidism, ultrasonography shows normal testicular middle-echo; 4 cases as lymph node mass (of which lymphoma 2 cases, lymph node metastasis 1 case, lymph node inflammatory change 1 case), acoustic image shows low weak echo; 4 cases as substance mass (of which fibroma 1 case, spermatic cord tumor 1 case, Desmoid tumor 1 case, spermatic cord inflammation 1 case), Ultrasonography shows non-uniformity middle-highor low echo.

结果 12例为腹外疝（其中斜疝9例、直疝2例、股疝1例），声像图表现为中高回声或混杂性回声团块；8例为鞘膜积液，声像图表现为无回声；2例为隐睾，声像图表现为似正常睾丸样中等回声；4例为淋巴结包块（其中淋巴瘤2例、淋巴结转移1例、淋巴结炎性改变1例），声像图表现为低弱回声；4例为实质性包块（其中纤维瘤1例、精索肿瘤1例、韧带样瘤1例、精索炎症1例），声像图表现为非均匀性中高回声或低回声。

Daniel Science's products include testing equipment simulating climatic environment and scientific instrument for labs and production equipment, main products include programmable constant temperature humidity chamber , programmable high-low temperature chamber, high temperature test chamber ,aging oven, thermal shock test chamber, salt mist canker chamber,thermostatic bath,low constant temperature circulator,drying cabinet, muffle furnace, moisture-proof box ,incubator, exposure test chamber ,drug stability test chamber, instruments simulating environment temperature and humidity required by academic research institutes,testing units, production of enterprises.

得益尔科学的产品包括模拟气候环境的试验设备和实验室科学仪器及生产设备，主要产品包括可程序恒温恒湿试验箱、可程序高低温试验箱、高温试验箱、老化试验箱、温度冲击试验箱、盐雾腐蚀试验箱、恒温槽、低温恒温循环器、干燥箱、马弗炉、防潮箱、培养箱、光照培养箱、药品稳定性试验箱等仪器设备，提供学术研究机构，检测单位，企业生产所需模拟环境温度和湿度等环境因素的仪器。

Salt Spray Test Chamber Environmental Test Equipment, Humidity Test Chamber, Thermal Shock Test Chamber, aging chamber, UV ultra-violet aging chamber, precision oven, rain test chamber, test chamber, such as sand and dust..

盐雾试验箱、恒温恒湿试验箱、冷热冲击试验箱、老化试验箱、UV紫外光老化试验箱、精密干燥箱、淋雨试验箱、砂尘试验箱等。

Salt Spray Test Chamber Environmental Test Equipment, Humidity Test Chamber, Thermal Shock Test Chamber, aging chamber, UV ultra-violet aging chamber, precision oven, rain test chamber, test chamber, such as sand and dust..

三。环境试验设备盐雾试验箱、恒温恒湿试验箱、冷热冲击试验箱、老化试验箱、UV紫外光老化试验箱、精密干燥箱、淋雨试验箱、砂尘试验箱等。

The pump body consists of suction chamber, liquid storage chamber, turbination chamber, liquid return port, gas-liquid separation chamber, etc. After the pump starts normally, the impeller will suck the liquid in the suction chamber and the air in the inlet line so that the both can mix fully in the impeller. Due to the centrifugal force, the liquid along with the gas flows towards the outer edge of the turbination chamber and then a belt of white foam with a certain thickness and a liquid ring with high-speed rotation come into being on the outer edge of the impeller.

泵体由吸入室、储液室、涡卷室、回液孔、气液分离室等到组成，泵正常起动后，叶轮将吸入室所存的液体及吸入管路中的空气一起吸入，并在叶轮内得以完全混合，在离心力的作用下，液体夹带着气体向涡卷室外缘流动，在叶轮的外缘上形成有一定厚度的白色泡沫及高速旋转液环。

Time is long, he discovers each chamber of commerce each does things in his own way, undertake warlord battle royal to strive for a member, the name says chamber of commerce, the solid side that it is business, created huge resources waste, let member of chamber of commerce lose the real sense that adds chamber of commerce at the same time, be aimed at this one circumstance, he advanced the idea of alliance of round-the-world chamber of commerce timelily, got each are answered actively of big chamber of commerce.

时间久了，他发现各个商会各自为政，为争取会员进行军阀混战，名曰商会，实为商帮，造成了极大的资源浪费，同时让商会会员失去了加入商会的实际意义，针对这一情况，他适时的提出了环球商会联盟的概念，得到了各大商会的积极响应。

In this paper, preliminary FDS fire chamber to simulate the flue gas generated through the corridor adjacent to the room near the migration laws, an analysis of indoor air flow field and the movement of smoke layer, and through the simulation of fire scenes, in a simple form of visual dynamic display of the entire process of fire, in the simulation process to obtain more accurate fire-related parameters such as temperature distribution, gas flow and heat radiation, and analysis of simulation results through the fire chamber of the flue gas migration characteristics, results showed that the chamber in the absence of fire smoke control measures, the process of the spread of smoke filled the first chamber is at the top, with the passage of time, the proliferation of slowly downward until the entire chamber is full, and then through the corridor smoke quickly spread to the nearby chamber.

本文运用FDS初步模拟了腔室火灾产生的烟气通过毗邻的走廊向附近房间迁移的规律，分析了室内空气流场和烟气层运动状况，并通过对火灾场景的模拟，以简单直观的形式动态显示出火灾发生的全过程，在模拟过程中获得较准确的火灾相关参数，如温度场分布，烟气流动及热辐射等，并通过模拟结果分析腔室火灾的烟气迁移特性，结果表明着火腔室在无防排烟措施的情况下，烟气扩散的过程是首先充满腔室顶部，随着时间的推移，慢慢向下扩散，直至将整个腔室充满，然后烟气通过走廊快速向附近腔室蔓延。

Then 34 echo "Usage: 'basename $0' Word-to-define " 35 echo 36 echo "Note: Word to look up must start with capital letter," 37 echo with the rest of the word in lowercase.

# 注意： 21 #----- 22 #这个特定的1913年版的韦氏词典 23 #+在每个入口都是以大写字母开头的 24 #+。

In accordance with the generating principle of line echo and after analyzing main echo cancellation algorithms, and after in-depth study on the core algorithms of all the module of adaptive echo canceller, in particular, adaptive filtering algorithm and double talk detection algorithm, considering with complexities and capabilities of all the candidates, this paper chooses NLMS algorithm to implement echo canceller.

首先，对回波产生原理和目前几种常用回波消除算法进行了分析，在研究自适应回波消除器的各个模块，特别是深入分析各种自适应滤波算法和双讲检测算法，综合考虑各种算法的运算复杂度和性能的情况下，这里采用NLMS算法实现白适应回波消除器。

World War II: Battle of Saipan - Americans take Saipan.

1944年的今天，美国在塞班战役中拿下塞班岛。

When the scorner, the rejecter of truth, has become presumptuous; when the routine of work in the various money-making lines is carried on without regard to principle; when the student is eagerly seeking knowledge of everything but his Bible, Christ comes as a thief.{DA 635.3

当讥诮和拒绝真理的人，到了任意妄为时，当追求财利者罔顾按道义经营谋利时，当学人正在兢兢业业地研究各种知识，而单把圣经丢在一边时，基督要像贼一样来临。