time-variance 中文意思是什麼
time-variance
解釋
時間變異-
An optimized algorithm for mining association rules in hydrological time series is proposed on the foundation of the analysis of variance ( anova ), contingency table test and the new definition of interestingness
摘要基於方差分析、列聯表檢驗以及興趣度的定義，提出一種挖掘水文時間序列關聯規則優化演算法。 -
A generalized minium variance pole assignment pid self - tuning controller can be used for the system with gentle time - varying delay. the controller algorithm is simplified. its effectiveness has been shown in many simulation uses
在考慮系統時滯特性的情況下，提出了適合一類時滯系統的廣義最小方差極點配置自校正控制器，並對控制器演算法進行了簡化，使該控制器簡單易行，適應性強，模擬結果表明它的有效性。 -
Abstract : events contributing to the establishment of statistics the science of data and its chemical branch are epitomized. as the new chemical branch named chemometrics or chemstatistics has been disputed in the circles of chemistry for a long time, reasons for adopting chemstatistics are given, which is defined as the science of gathering or generating, describing, summarizing and interpreting the data concerned to acquire new chemical knowledge or information. the fact that many traditional statistical methods, such as significance tests, analysis of variance, regression and correlation, and some others not usually considered statistical, such as model building, monte carlo method, fourier transformation, artificial nerval networks and pattern recognition, each contains one or more of the five connotations of statistics is expounded. the regular pattern that a chemstatistician grows up is approached. the urgent task is to include chemstatistics in the undergraduate or graduate curriculum of chemistry specialty. the goal of the project is to nurture chemists who know statistics
文摘:本文追溯了統計學發展、建立中的大事，陳述了它的定義及其化學分支發展、建立的梗概；鑒于化學界對該新興化學分支學科的名稱長期存在爭議，提出了以化學統計學而不以化學計量學為該學科名稱的理由，把化學統計學定義為一個研究有關數據的收集或產生、描述、分析、綜合和解釋，以獲得新化學知識或信息的學科；闡明了許多公認屬于統計學的方法，如顯著性檢驗、方差分析、回歸和相關，以及一些尚未認定屬于統計學的方法，如模型建立、蒙特卡羅方法、傅立葉變換和人工神經網路，都含有統計學5個內涵中的一個或多個；探討了化學統計學家成長的模式，認為當務之急是把化學統計學納入化學專業的教學計劃，以培養懂統計學的化學家。 -
The wastewater treatment system is one dynamic system of indeterminacy, time - variance, nonlinearity and posteriority. so it is difficult to create a precise mathematical model
城鎮污水處理系統是一個具有不確定性、時變性、非線性、滯后性的動態系統，難于建立起精確的數學模型。 -
A simple, robust method is proposed that relies on high - resolution measurements and on - line analysis of network traffic to provide real - time alarms in the incipient phase of network anomalies. the anomaly identification algorithms based on behavior model using path changes, flow shift and packet delay variance
通過高性能測量和在線分析網路流和路由信息對初始網路異常產生實時報警，提出基於路由變化、流變化和包延遲建立網路行為模型的網路異常檢測演算法。 -
On the one hand, the author discusses markowitz ' s mean - variance portfolio selection model, single - index portfolio selection model, and simplified model of optimal portfolio selection. at the same time, based on the rules of optimal portfolio selection and other risk - metric indices, the author also discusses mean - absolute deviation model, mean - semivariance model and mean - value at risk model. on the other hand, the author discusses the asset pricing model, including the capital asset pricing model ( capm ), the multi - factor asset pricing model, and the arbitrage pricing model ( apt )
一方面，作者討論了馬科維茲的均值-方差資產組合選擇模型、單指數資產組合選擇模型、最優資產組合選擇的簡化模型，同時根據最優資產組合選擇原則和其他風險度量指標，討論了均值-絕對離差、均值-半方差和均值-風險價值資產組合選擇模型；另一方面，作者討論了資產定價模型，包括多因素資產定價模型和套利定價模型，特別是在四種因素變量的基礎上，探討多因素資產定價模型。 -
Comparing numerical character of above two models, it shows that the variance of atmosphere motion must be modified so the time step used in numeric simulation has no effect on numerical character of chaff clouds
對數值模擬模型的分析表明必須對大氣的運動方差進行時間離散化補償，進行離散化補償后箔條雲團的數字特徵不受模擬時時間步長的影響。 -
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 )
軟體的處理功能包括：數字濾波、時域加窗、自相關與互相關處理、均值和方差計算、概率密度和概率分佈函數計算；在快速傅立葉變換（ fft ）基礎上計算自功率譜、互功率譜、頻率響應函數、相干函數、倒頻譜分析；基於短時傅立葉變換（ stft ）的聯合時頻分析等。 -
In, it is discussed how to estimate the profit expection and risk of portfolio by time series, and that the portfolio investment model can be made by the variance of portfolio selection random profit
在1中，我們首先介紹了如何利用時間序列預測法估計證券的預期收益率和風險，然後以投資組合隨機收益率的方差作為投資的風險度量，建立起投資組合模型。 -
This study was conducted to examine the interrelationship of 10 seed vigor traits in 12 wheat genotypes through variance, co - variance and path coefficient analysis, to determine broad - sense heritability, and to estimate genetic advance under selection. the genotypes showed significant difference for all traits, except for percentage of normal seedling. genetic correlation between conversion efficiency of seed reserve, electrical conductivity with other traits were not significant, showed that selection for any of them might be possible without hampering any other traits. however path coefficient analysis indicated that conversion efficiency of seed reserve, seed reserve utilization ratio have strong direct effect in affecting seedling weight, and that mean germination time has significantly negatively correlated in affecting gi. moderate to high estimates of broad - sense heritability, genetic coefficient of variation and expected genetic advance were obtained for electrical conductivity, germination index, mean germination time, seed dry weigh, seedling dry weigh, seed reserve depletion ratio indicating the possibility for improving these traits
本研究利用12個普通小麥品種對10個種子活力性狀的遺傳變異和相關研究，表明除正常幼苗百分率外，其餘種子活力性狀在品種間均存在顯著的差異.種子貯藏物質轉換效率、電導率兩個性狀間及與其它性狀均無顯著的遺傳相關，因此對他們的選擇不會影響到其它性狀.通徑分析表明幼苗干重主要取決于種子貯藏物質轉換效率、種子貯藏物質利用速率;發芽指數主要由平均發芽時間決定.電導率、發芽勢、幼苗干重、種子干重、發芽指數、種子貯藏物質消耗比率6個性狀表現中到高的遺傳力、遺傳變異系數和相對遺傳進展，指明通過遺傳育種手段改良這些性狀是可能的 -
When analyzing the principle and performance of the lsdll, circular flowgraph is used. the expression for " penalty " time and mean and variance of the acquisition time is derived from the circular flowgraph of large step acquisition method
在理論方面，本文利用圓形狀態圖對大步進快速捕獲法的工作原理進行研究和分析，導出由相關處理時間、大步進時間、虛警概率、檢測概率和虛警「代價」時間表示的捕獲時間平均值及其方差的表達式。 -
The fifth chapter " stock price arfima, garch and figarch model " introduced different kinds of time series models including fractal model, method such as analysis of variance ( anova ) and unit root test to test the stability of time series, method and criteria to estimate the arfima, garch and figarch model
第五章介紹了股票價格的分形時間序列模型，介紹了檢驗時間序列平穩性的方差分析和單位根檢驗方法以及非平穩的處理方法， arfima ， garch和figarch模型的建模方法和股票市場的分形特徵和股票價格的figarcll模型叭穴參數估計方法和估計準則。 -
Since 1960 ", the methods for charactering time - frequency stability in time - domain have been in progress. the methods include allan variance, modified allan variance, time variance, hardamard variance, total variance, time interval error ( tie ) and maximum time interval error ( mtie ), of which tie and mt1e are usually used for telecommunication network
自20世紀60年代以來，時間及頻率穩定度的表徵方法一直在不斷的發展，有阿侖方差、修正阿侖方差、時間方差、哈達瑪方差、總方差以及常用於電信網路的時間間隔誤差（ tie ）和最大時間間隔誤差（ mtie ） 。 -
This paper mainly research how to take full advantage of various quality tools, including work - site management 5s, traditional seven quality tools, process capacity analysis, poor quality cost analysis and more complicated statistics factorial experiment and variance analysis, to lower products cost and improve revenue through process deviation reduction, process cycle time reduction or process output improvement
該論文主要研究如何運用各種質量持續改進工具：現場管理5s法、傳統的七種質量工具、過程工序能力分析、質量成本分析法以及較復雜的統計學知識因素試驗和方差分析持續降低過程偏差，減少過程周期時間或增加過程產出，從而降低產品成本，增加收入。 -
From results we know that correlation of return time series is not obvious, but correlation of the square time series of return, i. e., variance time series, is clear. so we use garch model to estimate conditional variance, and calculated parameters in model by the way
應用相關性分析，得出了收益率序列之間不存在明顯的序列相關性，而收益率平方序列存在顯著的相關性，即方差序列存在相關性，因此我們使用g刁rch模型建模來估計條件方差，計算出了模型中的相應參數 -
Making use of the time series exhibitions of the fluctuation - rate datum, we make our study for the following two purposes : one is to observe whether the preannouncing companies " temporal - condition variance of the series of the return rate conforms to the demand of sta bility ; the other is to decide whether the preannouncing companies " stocks have asymmetrical - information adjustment, this is to say, to decide how the companies response to good or bad news
為了進一步檢驗盈餘預告新規則實施效果，我們考慮從波動性入手對股票市場的穩定性進行系統分析。我們嘗試利用波動率數值的時間序列表現進行研究，力圖了解：預告公司股票日收益率序列的時變條件方差是否滿足穩定性要求。預告公司股票是否存在信息非對稱性調整現象，即對利好利空消息分別做出何種反應。 -
Some robust stability conditions are derived. ( 4 ) a class of dual - rate input - output predictive model containing time delays is established. a new dual - rate predictive control algorithm for the time - delay system is presented, which makes up the shortcoming of multi - rate weighted minimum - variance control for time - delays system, and has solved the influence of time delays on the multi - rate system
針對輸入更新速率比輸出采樣速率慢的雙速率采樣系統，建立了帶有時滯的輸入輸出預測模型，給出了時滯雙速率采樣預測控制演算法，彌補了已有文獻中時滯多速率采樣加權最小方差控制的不足，解決了時滯對多速率采樣系統帶來的影響 -
The simulation results prove that the proposed dbrd strategy is superior to other two strategies on the mean and variance of cycle time, work in process and throughput
實例驗證表明，該演算法相對于其他兩種派工策略，在產能、加工周期、方差和製品數量等4個指標上均有所改善。 -
The results show that although dbm method can fit the systems with high precision, avoid over - fitting and accurately reflect the time - variance and state - dependency in the systems, it may also reduce the efficiency of the whole method due to the exponentially increasing calculating numbers with the increase of the number of the states. and genetic algorithm is introduced to improve the search efficiency
接著利用dbm方法和其他非線性辨識演算法分別對時變參數方程、 lorenz方程和杜芬方程進行分析和比較，發現盡管方法本身具有擬合精度高，不存在過擬合現象，可以較精確的反應參數對于狀態或者時間的依存關系等特點，但是sdp方法在分析復雜問題時存在搜索效率低，計算時間長的缺點。 -
An accuracy control of the position and velocity of an ultrasonic motor is a difficult problem due to the time variance and nonlinearity of its parameters
摘要由於超聲馬達的時變和非線性，使其速度與位置的高精度控製成為難題。
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