恒定的
- 与 恒定的 相关的网络例句 [注:此内容来源于网络,仅供参考]
-
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 the Saint-venant equations describing the channel flow movement, the nonlinear algebraic equations derived by the use of Preissmann weighted implicit four-point scheme are solved with the Netwon-Raphson method. A combined Gauss main-element elimination method with compress-storage technique is proposed. The relaxation iterative method for solving branch river networks is extended, which can turn the problem of any complex river networks into the problem of a series of single rivers. The coupling of hydraulic model with water quality model is built up. The combined model was applied to a large complicated river networks with numerical hydraulic structure which influenced by strong tide, storm and heave rain. Visualization of computational results is realized by means of MapInfo, which displays the computational results in fast, convenient and accurate way.
水力模型以描述河道洪水波运动的Saint-Venant方程组为基础,用Newton-Raphson方法直接求解按Preissmann加权四点格式进行离散所得的非线性代数方程组,提出了压缩存贮形式的Gauss列主元消去法并对数值解的收敛性进行了讨论;将支流流量的松弛迭代方法从树状河系推广到了环状河网,使任意复杂河网水力计算的问题都可化为一系列的单一河道的水力计算问题;建立了水力模型与水质模型的联接,初步应用于既有洪水、暴雨、强潮等综合影响,又存在多种水工建筑物及水力调度问题的大型复杂河网中的非恒定流水力、水质计算问题;利用MapInfo对计算结果的可视化进行了研究,有利于决策者快速、方便、准确地作出决策。
-
Secondly,* The legislative, or supreme authority, cannot assume to itself a power to rule by extemporary arbitrary decrees, but is bound to dispense justice, and decide the rights of the subject by promulgated standing laws, and known authorized judges: for the law of nature being unwritten, and so no where to be found but in the minds of men, they who through passion or interest shall miscite, or misapply it, cannot so easily be convinced of their mistake where there is no established judge: and so it serves not, as it ought, to determine the rights, and fence the properties of those that live under it, especially where every one is judge, interpreter, and executioner of it too, and that in his own case: and he that has right on his side, having ordinarily but his own single strength, hath not force enough to defend himself from injuries, or to punish delinquents.
第二,立法权力或最高权力,不能自认为是通过即兴的肆意的法令来统治的权力,而只能局限于衡量正义(衡量罪行与惩罚是否相当,衡量伤害与补偿是否相当),并由公布的恒定法律和已知被授权的法官来裁定臣民之间的权利:因为自然法并非成文,所以只能在人们的思想中找到它们,在没有设立法官的地方,由于人们充满了激情或利益的考虑便会错误引证或应用自然法,从而就不能那么容易的确定他们的错误了:这样一来立法权力就不是服务于——它本来应该如此——裁定权利,保护生活于其下的臣民的财产,特别是在他自己的事件中,每个人都是审判者,解释者和执行者:有权利的一方,通常仅仅只能依靠他自己的力量,没有足够的力量来保护自己免于伤害,或者去惩罚犯罪者。
-
A normal method to eliminate these stripes is presented. And then a new method based on a stable reference source is presented and validated. And the two methods are compared. The result shows that it is better to turn off blackbody controller when it is very difficult to control blackbody temperature precision, and it is of significance for remote sensing application of infrared scanner.
针对该明暗条纹消除方法,介绍了常规的基于图像处理的&Laplacian噪声消除法&,并提出了一种新的解决方法&恒定参考源法&,通过对比这两种方法,认为在难以保证黑体控温精度的情况下,关闭黑体的温控功能是一种更好的解决方法,对于红外扫描仪的遥感应用具有一定的指导意义。
-
More accurate crystallographic parameters and improved mathematical model were used in simulating the formations of 3D plate-shaped or 2D lenticular-shaped Ni4Ti3 variants.
与二维模型相比,本研究采用了准确的晶体学参数及改进的数学模型,获得了更为直观及合理的三维盘状变体及二维透镜状变体; Ni4Ti3沉淀相的长度、宽度和面积分数随时间的变化分别遵循指数、线性和对数关系;且其长度与宽度的比值并非恒定值,在生长初期该比值有较大的增速而随后逐渐减慢,能很好地解释沉淀相盘状及透镜状形貌特征形成的原因并与相关实验结果吻合。
-
First, by the allocation of irrigation water directly into the ditch outlet Xiaqi, achieve no water loss, greatly improve the utilization of water; are two irrigation systems, replace the pipe with water furrow, not square, and the right to re-use, reducing the irrigation investment; Three is the use of the gate with the outlet opening to adjust a constant and accurate control of flow into the trench plot, for different soil and different groove specifications Xiaqi can greatly improve irrigation uniformity; four gates are porous pipe irrigation system for the flow tubes, and the blind to cross the flow tube as compared to the wall can reduce the work under stress, and reduce the damage to the opportunity to prolong the service life of thin-walled tube; are five gates to facilitate the installation of irrigation systems, pipes, and, upon request, to fight孔安outlet assembly to ensure the accuracy of positioning with the outlet.
一是灌溉水经配水口直接进入沟畦,实现无输水损失,极大地提高了水的利用率;二是管灌溉系统代替配水垄沟,不占地,且右重复使用,降低了灌溉投资;三是利用配水口的闸板开度来调节准确恒定地控制进入沟畦的流量,适用于不同土质和规格不同的沟畦,可大大提高灌水均匀度;四是闸管灌溉系统为多孔出流管,与等过流量的盲管相比,可降低管壁承受的工作压力,并减少受损机会,从而延长薄壁管的使用寿命;五是闸管灌溉系统安装方便,并可根据要求打孔安装配水口,确保配水口定位的准确性。
-
L Intelligent three-phase charge mode: We adopt constant current technology at the beginning of charge, which can made current invariable and avoid battery broken or accelerating battery aging. It can convert to constant- voltage and current-limiting charge when charge voltage achieves upper limit voltage, which can improve effectively the capacity conversion efficiency of battery. Trickle and floating charge make each single cell battery constant receive electricity and ensure battery capacity can be recall most, which solved the unbalanced phenomenon of single cell battery and avoid the danger of voltage change and the end of battery charge, extend battery life.
l 智能三阶段充电模式:充电初期采用恒流技术,使充电电流恒定,避免损坏电池,加速电池的老化;充电电压达到上限电压时自动转换为恒压限流充电,有效的提高了蓄电池的容量转换效率;涓流浮充使各单体电池均衡受电,保证电池容量得以最大限度恢复,有效解决单体电压不均衡现象,避免了市电电压的变化和蓄电池充电的末期造成的蓄电池过压充电的危险,大大延长了蓄电池的使用寿命。
-
Trickle and floating charge can make each single cell battery receiving electricity constant, ensure batteries capacity resuming maximum, settle the disproportion phenomenon of single cell battery, avoid the overvoltage charge danger of the power voltage change and the end of battery charge and extend the operational life of battery.
61548;完善的充电特性:采用恒流技术,充电初期电流恒定,使每节电池都能较快地充分地充满电,充电效率高,电池温升小;在充电电压达到上限电压时自动切换到恒压限流充电,有效的提高了蓄电池的容量转换效率;涓流浮充使各单体电池均衡受电,保证电池容量得以最大限度恢复,有效解决单体电压不均衡现象,避免了市电电压的变化和蓄电池充电的末期造成的蓄电池过压充电的危险,大大延长了蓄电池的使用寿命。
-
Quantitatively, the optical density of NADPH-d positive neurons in all of the related nuclei was significantly increased in the BDL animals compared with controls. Since NO is thought to be able to increase the motilities of the gallbladder and the sphincter of Oddi in anesthelized rabbits, the elevation of NADPH-d and NOS reactivities is likely to magnify the excitatory effect on the extrahepatic biliary system for the purpose of depletion of the loitered bile juice from the jaundiced liver. These data may also have important implications for the altered state of circulatory, metabolic or regenerative responsiveness under pathological condition.
此现象一来可推测,肝脏在遭受胆管阻塞性黄胆的伤害后,其代谢、血液动态与温度调节作用势必改变、紊乱、甚至失功能,而感觉神经也势必会接受到大量的机械性、化学性、渗透性等感知讯息,所以感觉神经元将一氧化氮制造量提升,有助於感觉讯息的快速传报,以发挥回馈调控的效果;二来可表示,自主神经系统不论是交感或副交感神经,为了因应胆管阻塞所造成肝脏的病变,以增加一氧化氮的制造,意欲刺激肝外胆道系统,排空滞留在肝脏内或胆囊内的胆汁,而达到恢复肝脏内代谢、血液循环、胆汁流动等功能控制的恒定状态。
- 推荐网络例句
-
But we don't care about Battlegrounds.
但我们并不在乎沙场中的显露。
-
Ah! don't mention it, the butcher's shop is a horror.
啊!不用提了。提到肉,真是糟透了。
-
Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.
Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。