population of parameters 中文意思是什麼

population of parameters 解釋
參數群
  • population : n. 1. 人口；人口總數；全體居民；人口的聚居。2. 物的全體[總數]；【生物學】蟲口；種群（量）；群體；族，組，個數；【統計學】對象總體，全域。3. 【物理學】布居；密度。4. 〈罕用語〉殖民。
  • of : OF ＝Old French 古法語。
  • parameters : 編輯特徵參數
  1. By making some assumptions, collision frequency were presented. then the the flocculation kinetics model was established through population balance equation. comparison of experimental data and modeling results indicate that there are the same trend between the two. so the model can predict floes number and size during flocculation of yellow river ' s loess particles without using empirical parameters. the tem and sem were used to obsever floes in the study of floe structure. the flocculation was divided as flocculi, floc and floe aggregate. the floes structure model was established by assumption that particles position in floe accords with tetrahedron. the fractal dimension of model and experimental floes was found to be coincidentso the model can reflect the structure of flocs formed in flocculation of yellow river ' s loess particles by macromolecule flocculant at a certain extent

    最後，本文還對絮凝動力學和絮體結構進行了研究，在前人研究的基礎上，針對高分子絮凝黃河泥沙，對絮凝過程作了一些符合試驗條件的假設，建立了顆粒碰撞頻率表達式，應用了顆粒數量平衡方程，從而建立了絮凝過程的動力學生長模型，模型計算結果與試驗數據對比表明，二者趨勢一致，在沒有使用經驗參數的情況下基本上能夠描述黃河泥沙絮凝過程中絮體數量和尺寸分佈的變化過程；對絮體結構的研究中，應用掃描電子顯微鏡和透射電子顯微鏡對絮體進行了觀察，將絮體分為絮粒、絮團和絮網三個不同的生長階段，通過假設顆粒結合位置符西安建築科技大學博士學位論文合正四面體，建立了絮體結構模型，計算得到的模型絮體分形維數基本與試驗中的實際絮體相符，在一定程度上能夠反映高分子絮凝黃河泥沙生成的絮體結構。
  2. Particle swarm optimization ( pso ) is inspired by social behavior of bird flocking or fish schooling. it is a population - based, self - adaptive search optimization technique. pso is simple in concept, few in parameters, and easy in implementation

    粒子群優化演算法（ particleswarmoptimization ， pso演算法）源於鳥群和魚群群體運動行為的研究，是一種基於種群搜索策略的自適應隨機演算法，是進化計算領域中的一個新的分支。
  3. Finally, simulation experiments, the different parameters set out under the track, population size of the different fitness value of statistical analysis, the results showed that use of genetic algorithms in robot path planning is effective and feasible

    最後通過模擬實驗，對不同參數設置下規劃出的路徑進行比較，不同種群大小的適應度值進行統計分析，結果表明，遺傳演算法應用在機器人路徑規劃中是有效的，可行的。
  4. Background and purpose ? we explored the association between transcranial doppler hemodynamic parameters and the risk of stroke in the general population

    背景與目的：我們探討了普通人群中經顱多譜勒血液動力學參數與卒中風險的相關性。
  5. Then, with the concept of accumulated failure probability, the proposed approach combines the least ? quares method with bayes " theorem, takes advantage of the parameter estimation for single weibull distribution to each derived subgroup data set, and estimates the parameters of each subpopulation. the estimates given by this paper also satisfy the maximum likelihood equation. the mean time to failure and the reliability estimation of the mixed population are given

    然後通過利用累積失效概率等概念，對每個導出的子組數據集聯合運用最小二乘法、貝葉斯定理和對單一威布爾分佈的參數估計法，從而得到每個子總體的滿足極大似然原理的參數估計，給出了該混合總體平均壽命和可靠度的估計。
  6. Effect of temperature on the population parameters of trichogramma dendrolimi infected by wolbachia

    溫度對感染沃爾巴克氏體的松毛蟲赤眼蜂種群參數的影響
  7. Studies on parameters experiment population life table to analyze factors causing outbreaks of pest mites in moso bamboo forests

    從實驗種群生命表的參數分析毛竹害蟎暴發成災的成因
  8. Root distribution and canopy structure parameters of s. godejevii in different sandy land habitats ( semi - fixed sand dunes, fixed sand dunes and inter - dunes low land ), as well as species composition and their frequency in the herb layer of the scrubs, were compared the results were as follows : the population hi the semi - fixed sand dunes had the most developed root systems, followed by he population in the fixed sand dunes, and that hi the inter - dunes low land was the last

    為了更有效地利用這一重要植物資源，本文對分佈於渾善達克沙地三種不同沙地生境（半固定沙丘、固定沙丘、丘間低地）黃柳灌叢的根系分佈，冠層特徵進行了研究，同時測定了灌叢下草本層植物種類組成及頻度，結果表明：半固定沙丘上的黃柳根系最發達（根系分佈深，數量大） ，固定沙丘的黃柳明顯不及前者，而丘間低地的黃柳根系最不發達。
  9. Influence of resistant rice varieties to the population parameters of nilaparvata lugens and sogatella furcifera

    抗性水稻品種對褐飛虱和白背飛虱種群參數的影響
  10. Studies on the experimental population parameters of eotetranychus pruni oudemans

    李始葉蟎實驗種群參數的研究
  11. In the same time we also use it to test the power of dc crossover. in this algorithm every element in the population a domination count is defined together with a neighborhood density measure based on a sharing function. those two parameters are then non - linear combined in order to define the individual ' s fitness

    演算法通過計算種群中pareto優于某個個體的個體數目以及個體所在位置的密集度來定義適應度函數，多個算例的測試結果表明該演算法結合錯位交叉運算元具有較好的性能，能夠使演算法收斂到pareto概念下的比較均勻的一組非劣最優解。
  12. The death rate of individuals in dongwenquan population shows another pattern with slowly raise along with the age. 3 with the use of the dispersal index ( di ) clump intensity ( ci ' s ) mean crowding ( m * ) patchiness index ( pai ). green ' s index ( gi ) and intensity index as parameters, we further studied the spatial distribution patterns of the three populations

    ， chtoran ， hoidesyaog ）種群結構與動態研究3 、用leshe矩陣模型定量預測三個種群未來20a的數量與年齡結構變化的結果顯示，北溫泉緒雲衛矛種群數量在未來4a內會有一定程度的減少，以後的種群數量逐漸增加，呈不斷擴大的趨勢，而這其中幼齡個體所佔的比例越來越大，老齡個體的比例越來越小。
  13. In order to maintain the population diversity, the algorithm retains the individuals which have better fitness and farther away from the sets of the selected individuals, and uses the parameters of clustering to reduce computation cost

    為了保持種群的多樣性，演算法保留那些具有較好適應值並且與所選的最優個體集合較遠的個體，並利用聚類的參數來減少計算量。
  14. In the thesis, a functional software was developed for auto - analyzing the field evoked potential, which can automatically measure the time domain parameters such as the amplitude area latency of population spikes, the slope of excitatory postsynaptic potential and so on, it also can make the frequency - domain analysis

    它可以自動、快速地測出海馬誘發場電位的時域參數，如：群體峰電位（ populationspikes ， ps ）的幅度、面積、潛伏期以及興奮性突觸后電位（ excitatorypostsynapticpotentials ， epsp ）的斜率等，同時也可以對信號進行頻域分析和處理。
  15. 5. at the end of this paper, we compared the parameters that were used in population genetics

    本文對應用於群體遺傳分析的各種參數進行了系統的比較，以rapd分析結果為例分析了各參數的優缺點和使用限制等。
  16. Firstly, the identification of the double medium system is considered, the existence, the uniqueness and the boundness of the solution of the system of the partial differential equations are proved by using the monotone method, the mathematical model of the parameter identification problem is established, and under some mild assumptions, the optimality system about the identification is derived, thus the suitable gradient methods can be employed to solving the identification problem. secondly, the theories of optimal control of distributed parameter system are introduced to investigate the parameters identification problem involving the three - dimensional population system

    利用單調方法證明了正問題解的存在惟一性和有界性，建立了相應參數識別問題的數學模型，並給出了求解這類識別問題的最優化系，從而可利用適當的梯度法，實現對系統參數的識別；把分佈參數系統最優控制理論引入到具有多個識別參數的三維種群生態系統的參數識別問題之中，給出了參數識別問題最優解的存在性結論，證明了狀態方程的解對識別參數的連續依賴性和g （
  17. In order to understand the nature of the ecologist ' s investigation ， we may think of the density - dependent effects on growth parameters as the “ signal ” ecologists are trying to isolate andinterpret ， one that tends to make the population increase from relatively low values or decrease from relatively high ones ， while the density - independent effects act to produce “ noise ” in the population dynamics

    為了能理解生態學家們所從事的研究的性質，我們可以把那些作用於增長參數的密度依賴效應視作生態學家們力圖將其分離並予以解釋的「信號」 ，正是這一信號傾向于使種群從相對較低的數值遞增，或從相對較高的數值遞減；而與此同時，那些密度獨立效應起到的作用則構成了種群動態變化中的「噪音」 。
  18. So we mainly do the following works : firstly, we restrict the population distribution in the family of exponential distributions, construct the program of sequential confidence intervals for the one - dimensioned function of unknown parameters with general form, and acquire its some asymptotic properties, such as asymptotic consistency, asymptotic efficiency and bounded cost of ignorance

    為此，我們做了以下工作：我們首先把總體分佈局限在指數型分佈族中，建立了未知參數一般形式的一維函數的序貫置信區間程序，並得出它的漸近相合性、漸近有效性和未知代價的有界性。
  19. The simulating time is long as 100 years. in order to lucubrate all the variables ( population, jobs, houses supply, houses demand, workforce, the city development area, the density of population, the land - using rate ), the exogenous variables, parameters and structure are changed respectively and selectively in the simulating course

    在驗證了模型的有效性之後，對模型進行長達一百年的模擬，同時有針對性地改變模型的外生變量、結構及參數，以便更深入地觀察下列變量的變化情況：人口數量、就業崗位、住宅供給量、住宅需求量、勞動力、建成區面積、人口密度、土地佔用率。
分享友人
分享到 Line

分享到臉書