Through conducting research on the classification of high density drilling fluid, the optimal grain distribution of adulterant is determined using the density-grain-viscosity curve.

對高密度鉆井液進行了分類，以密度－粒度－黏度曲線確定了最優(yōu)化加重劑粒度分布色喲哟，通過優(yōu)化基漿配制工藝久久综合一色综合久久小蛇、優(yōu)選強抑制鉆井液體系、優(yōu)化加重劑與鉆井液的粒度分布研究日韩在线vip福利电影网，應(yīng)用超微細(xì)18禁美女裸体黄色网站、亞微態(tài)粒子穩(wěn)定技術(shù)，強化固相控制日韩色图欧美色图，形成一套優(yōu)化的高密度陽離子鉆井液技術(shù)工藝免费色网。

Analysis compared with different expression of temperature distribution on deposition and non-deposition in the tested inside-wall of pipeline,a nondimensional temperature function was founded to get a conclusion according to energy equation.Referring to Bessel function,a calculation equation of temperature distribution in the surface and heat-flow density of wax deposit layer in the laminar flow is deduced,as well as temperature distribution inside.This method provides a theoretic basis on the theory law o...

通過對試驗環(huán)道上測試段相關(guān)數(shù)據(jù)的測試，對比分析測試段管壁有沉積物和無沉積物時測試段管壁內(nèi)溫度分布的不同表達式黄色录像一区二区三区中文字波，根據(jù)能量方程建立了無量綱溫度分布方程国内特一级A片黄片，利用貝賽爾函數(shù)推導(dǎo)出原油在層流狀態(tài)下沉積層表面溫度分布、沉積層熱流密度黄片在线免费没播放、油流溫度分布等相關(guān)溫度場的計算公式福利性视频，為研究蠟沉積規(guī)律，定性分析管路結(jié)蠟層厚度和制定合理的清管方案奠定了理論基礎(chǔ)日韩无码黄色性交。

Statistical characteristics include Tectonic Density, Degree of Central Symmetry, Skewness Index, Degree of Tectonic Optimal Direction, Power Spectrum Density, Cubic Entropy and so on. The former four indexes are implemented in this paper; Structural characteristics show the characteristics of spatial distribution of geological bodies. In chapter four, a quantitative method for describing geological structure by using the structure "tree" is studied and implemented, including its formalized definition and the measurement of the similarity of different "trees".

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Studies on statistical properties of spontaneous spike trains of single auditory nerve have shown that the distributing patterns of interval in spike trains represent Poisson distribution. Since Poisson distribution is one of the simplest stochastic processes, previous studies on spontaneous spike trains of single auditory nerve were performed primarily by assuming them as stochastic processes. Recently, further studies on nonlinear dynamic system show that we have not enough evidence to demonstrate the process, whose distribution of probability density is exponential, is Poisson process.

中文題名豚鼠聽神經(jīng)單纖維放電序列的非線性特性分析副題名外文題名 Analysis on nonlinear properties in spike trains of single auditory nerve fiber in guinea pig 論文作者林龍年導(dǎo)師孫心德教授學(xué)科專業(yè)生理學(xué)研究領(lǐng)域\研究方向聽覺神經(jīng)生物學(xué)學(xué)位級別博士學(xué)位授予單位華東師范大學(xué)學(xué)位授予日期2001 論文頁碼總數(shù)91頁關(guān)鍵詞聽神經(jīng)聽覺神經(jīng)生理豚鼠館藏號BSLW /2001 /Q42 /41 對聽神經(jīng)單纖維自發(fā)放電序列的統(tǒng)計特性研究表明黄av在线日韩，聽神經(jīng)單纖維放電間隔呈泊松分布美女裸体日韩成人网站大全，而泊松過程是最簡單的隨機過程之一欧美老妇性野外久久，因此以往的研究主要將聽神經(jīng)單纖維自發(fā)放電序列作為隨機過程來處理。

The structure and heterogeneity of urban green space in the five districts in Fuzhou , which included the main tree species with diameter at breast height distribution, height class, health class, importance value, relation and the green space patches with areas distribution, perimeter distribution, porosity, connectivity, marginal density, dominance, the characteristics of geo-statistics and so on, were studied in quantification by the use of the principle of landscape ecology combining with the method of studying porosity and connectivity and geo-statistics.

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Having such properties, in a finite range of ［0,1］, as monotonic decreasing, unimodal distribution, and monotonic increasing, the β-distribution function with 2 or 3 parameters was used in describing the distribution model of coal particles different in density in a jig bed.

根據(jù)β分布在有限的［0，1］區(qū)間內(nèi)具有單調(diào)下降欧美激情視頻、單峰分布和單調(diào)上升等各種形態(tài)三级片91韩国自拍，用2參數(shù)或3參數(shù)的β分布作為描述各密度顆粒在跳汰床層中分布的數(shù)學(xué)模型。

An improved K-Means Algorithm based on Density is presented,with which K value of clustering number is located according to the clustering objects distribution density of regional space,and it uses centroids of high -density region as initial clustering center points.

該算法采用聚類對象區(qū)域空間的密度分布方法來確定聚類個數(shù)K的值女人与拘猛交69，然后用高密度區(qū)域的質(zhì)心作為K-Means算法的初始聚類中心精品偷拍第50页视频。

In the dissertation, a new stabilization method, equal-density method was adopted to prepare modified asphalts with storage stability at high temperature. In this method, a compound was prepared by premixing polymer and filler, and the compound was mixed with asphalt to prepare Polymer-Modified Asphalt by changing the ratio of polymer and filler. The asphalts with good storage stability were formed with the addition of filler, by regulating the density difference between polymer and asphalt. With identifying the effect of composition factor and the technique conditions on mechanical properties of polymer/filler compound and the molecular distribution of the polymer, identifying the effect of composition factor and the technique conditions on the properties and structure of polymer/filler modified asphalt, Styrene-Butadiene-Styrene copolymer, Low Density PolyEthylene, Styrene-Ethylene-Butadiene-Styrene block copolymer modified asphalts with good storage stability and performance were prepared. Rheological method, gel content analysis and swelling measurement were adopted to elucidate the interaction between the polymer and filler. Filler reduced the difference between the polymer and asphalt with the premixing technique, which led to the improvement of the storage stability of the modified asphalts. The thermo-oxidative aging process of base asphalt and PMA were studied and the effect of antioxidant additives on the base asphalt and PMA were analyzed.

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The nonparametric kernel density theory and methods are introduced to model the diameter distribution of broadleaved Pinus koraiensis in Liaoning eastern mountains in contrast with the normal distribution and Weibull distribution.

應(yīng)用非參數(shù)核密度估計理論和方法日韩乱伦一区二区，對位于遼寧東部山區(qū)的闊葉紅松林標(biāo)準(zhǔn)地的紅松進行直徑結(jié)構(gòu)模擬91国在线播放，并與正態(tài)分布、威布爾分布進行了比較欧美美国性交肛交高清。

The main research work of this dissertation is as follows: Based on the chemical reaction engineering theory and the nitrobenzene electroreduction mechanism, the plate and frame electrolyzer was designed and applied to the process of electroreduction nitrobenzene to p-aminophenol. This dissertation measured the residence time distribution data of the electrolyzer by means of the pulse response method and studied the rule of flow pattern along with the current capacity change. Under different conditions ,this dissertation studied the cyclic voltammetry properties of nitrobenzene on different electrodes by means of the dynamic cyclic voltammetry method and the electrode materials applied to the NB electroreduction have been selected primarily.Baseed on the results of cyclic voltammetry tests, this dissertation used p-electrode systems to measure the steady-state- polarization curves of nitrobenzene on different electrodes in H-type diaphragm cell, and obtained each primary factor s influence rule and the exchange current density value of each electrode.And then on the basis of the conclusions of fundamental researchs upword, the effects of influence factors on the the yield of p-aminophenol and the current efficiency,such as electrode material, current density, quantity of electricity circulated, nitrobenzene concentration . sulpuric acid concentration and so on, have been studied in detail in the systems of hign temperature , strong acidity and oxygen-poorthrough a series of electrolysis experiments in this paper.After all using Pb as anode Monel metal as cathode Dupont Nafion 417 cation-exchange membrane as membrane, this dissertation obtained the optimum technological condition: reaction temperature about 85C, current density 500A m-2, sulphuric acid concentration 20%wt.

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