The probability distribution function and the characteristic values of the curvature ductility factor are obtained 近似得出曲率延性系數(shù)的概率分布函數(shù)和特征值。
A necessary and sufficient condition with ergodic of 1 - order probability distribution function of stochastic process ( theorem 1 and corollary 1 ) and extended the general distribution theorem of stochastic variable under the case of weakly condition ( theorem2 ) are presented 摘要提出了隨機(jī)過程一階概率分布函數(shù)具有遍歷性的一個充分必要條件(定理1和推論1 ) ,并在較弱條件下,對一般的關(guān)于隨機(jī)變量函數(shù)分布定理作了進(jìn)一步的推廣(定理2 ) 。
4 . the seismic dynamic reliabilities of the nanjing changjiang tunnel were analyzed , and its dynamic reliable and disable probabilities under the 7 degree earthquake were obtained , by using the maximum stochastic responses and the first overstress mechanism . in the other hand , the probability of serious seismic intensity and its probability distribution function were calculated by analyzing the seismic degree , and the seismic dynamic reliable and disable probabilities of the tunnel in its design reference period were calculated by using the maximum stochastic responses and the first overstress mechanism 4采用最大隨機(jī)地震響應(yīng)和首超破壞理論分析了隧道抗震動力可靠度,得到了隧道在七度地震作用下的地震動力可靠概率和失效概率;并通過對南京長江隧址的地震危險性分析,得到了各烈度地震的發(fā)生概率及其概率分布函數(shù),在此基礎(chǔ)上,分別采用最大響應(yīng)和首超破壞理論計(jì)算了隧道在設(shè)計(jì)基準(zhǔn)期內(nèi)的安全概率和失效概率。
The signal process function of the software include these function : digital filter , windowing , auto - correlation function and cross - correlation function , mean and variance , probability density function and probability distribution function statistic ; auto - power spectrum , cross - power spectrum , frequency response function , coherence function , cepstrum analysis based on fft ( fast fourier transfer ) ; joint time - frequency analysis based on stft ( short - time fourier transfer ) 軟件的處理功能包括:數(shù)字濾波、時域加窗、自相關(guān)與互相關(guān)處理、均值和方差計(jì)算、概率密度和概率分布函數(shù)計(jì)算;在快速傅立葉變換( fft )基礎(chǔ)上計(jì)算自功率譜、互功率譜、頻率響應(yīng)函數(shù)、相干函數(shù)、倒頻譜分析;基于短時傅立葉變換( stft )的聯(lián)合時頻分析等。
Frequency code is not uniformity distribution and keeps to a probability distribution function defined by the spectral characteristics of the target of interest . the phase code is equally duality pseudo - random sequence and used to reduced the sidelobes of the signal correlation function . and the mismatch - phase sequence is corresponding with the frequency sequence one by one 而頻率編碼為不均勻分布,由所觀測目標(biāo)的頻譜信息提取出概率密度函數(shù)決定頻率編碼序列的分布;相位編碼為二元的偽隨機(jī)序列,采取均勻的二相編碼,消減同頻脈沖帶來的過高的相關(guān)函數(shù)的旁瓣;而失配相位為與頻率編碼相一一對應(yīng)于各子脈沖中。
According to the phenomenon that some vehicles may come cross the starting difficulty after the engine running a period of time , the paper firstly analyzes , the practical meaning of engine cold start parameter for automatic testing and diagnostic systems , according to dempster - shafter amalgamation rule , requirement of proof , aining at concrete fact of breakdown diagnosing for engine cold start . conforming basic probability distribution function , it presents concrete realization for decision - making amalgamation arithmetic , completes for development of soft and hard wares of automation synchronous messure of engine cold start " s parameter 針對發(fā)動機(jī)運(yùn)行一段時間后,部分車輛就會出現(xiàn)起動困難的故障現(xiàn)象,本文首先分析了發(fā)動機(jī)冷起動參數(shù)自動測試與診斷系統(tǒng)的實(shí)際意義,根據(jù)dempster - shafer證據(jù)理論的融合規(guī)則、要求,針對發(fā)動機(jī)冷起動故障診斷的具體實(shí)例,構(gòu)造了基本概率分配函數(shù),給出了決策層融合算法的具體實(shí)現(xiàn)方法,完成了發(fā)動機(jī)冷起動參數(shù)自動同步測試的軟件硬件開發(fā)。
At first , based on the 272 station monthly precipitation in china , the paper described the heterogeneous of the spatial distribution precipitation by use of the curve of lorenz and the coefficient of g . the results show that the heterogeneous of the spatial monthly precipitation in summer is stronger than in winter . based on this describing , the probability distributions function of the spatial distributions are fitted by use of the gamma distribution model , and this general principle is examined . the results show that the gamma distribution is good on describing the heterogeneous of the spatial distribution precipitation in china 并以分布擬合中國區(qū)域月降水量的空間概率分布,擬合效果優(yōu)良,表明描述中國區(qū)域月降水量水平空間分布非均勻性的普適分布律以分布的pdf最為適宜;以1 、 4 、 7 、 10月具有代表性的資料為例分析了各季月降水量空間分布型的主要特征及其形成原因,并從一個側(cè)面表明我國月降水量空間分布的偏態(tài)性正是我國降水氣候的最顯著統(tǒng)計(jì)特征之一,這也與我國大陸性季風(fēng)氣候特點(diǎn)密切相關(guān);并且月降水量的基尼系數(shù)和分布模式形狀參數(shù)值都是夏季大于冬季,說明月降水量的空間分布非均勻性夏季比冬季弱。
This paper presents a theoretic analysis of the temporal characteristics of output buffer in switch , gives the probability distribution function of delay and average queuing time , and compares the end - to - end delay between traditional and switched ethernet . vlan is one of important technologies that switch has to implement . switch has to rapidly and efficiently find and maintain an un - looped topology 在建立交換機(jī)的延遲模型基礎(chǔ)上,推導(dǎo)出輸出緩沖延遲分布、隊(duì)列大小等特性;接著比較傳統(tǒng)總線型以太網(wǎng)和交換式以太網(wǎng)的端到端延遲,為交換機(jī)以及交換式以太網(wǎng)的設(shè)計(jì)和分析提供可靠的理論基礎(chǔ)。
Finally , this paper set up the substitute model between the new technology and the old one and studied characteristic of the diffusion system applied system dynamic method such as the stable points and phase portrait and hopf bifurcation and limit cycle of it . then studied the probability distribution function of them , and the probabilistic equation of this system 最后建立了四川大學(xué)碩士畢業(yè)論文創(chuàng)新技術(shù)和舊技術(shù)的技術(shù)更替模型,并運(yùn)用系統(tǒng)動力學(xué)的方法分析了擴(kuò)散系統(tǒng)在其不動點(diǎn)附近的變化特征和相圖以及改進(jìn)系統(tǒng)的hopf分支、極限環(huán)等性質(zhì),討論了新舊技術(shù)的概率分布,并且將動力學(xué)方程轉(zhuǎn)化為概率方程進(jìn)行分析。