分选性

结果发现，喉道平均直径和喉道中值增大，喉道分选性变差，流动主孔喉增大，退出效率降低。

It is found that the average throat diameter and throat median increase , the throat selectivity turns bad , the main flowing pore throat enlarges , and the quit efficiency decreases .

其次是较高的植被生态优势度、土壤中有机质含量和pH值，以及较差的土壤粒度分选性。

Secondly the higher ecological dominant degree of vegetation , pH values and organic matter contents in the soils , and the poorer sorting indices .

矿石中砂结构，分选性好；矿石w（SiO2）高达98.77%～98.98%，w（Fe2O3）仅0.038%～0.045%，实属少见的超纯石英砂岩矿床。

The ore SiO_2 content is up to 98.77 % ~ 98.98 % . Fe_2O_3 only 0 . 038 % ~ 0.045 % , which belongs to a ultra pure quartz sandstone mineral deposit .

在所观测区域内，沙丘沙的分选性由南向北变差。

The sand sorting gradually become bad from south to north .

沉积物分选性很差，其重矿物组成中以较稳定矿物和不稳定矿物为主。

The heavy mineral are composed of stable and unstable mineral .

岩石粒度偏细，主要为细砂岩，磨圆度为次棱角状，分选性中等&好。

The grain of the sandstone was fine , sub-angular , but sorting medium-good .

颗粒大小和分选性对岩石的孔隙和渗透率有直接关系。

The porosity and permeability of rock are related directly to grain size and sorting characteristics .

储层岩性主要为中细砂岩，砂岩分选性好-中等，结构成熟度较低。

The lithology of reservoir is chiefly mid-fine grained sandstone with good sorting and low texture maturity .

分选性与偏度呈现不显著线性正相关；与峰度几乎没有相关性。

Sorting and skewness showed no significant linear positive correlation ; and with kurtosis showing almost no relevance .

概率累积曲线各直线段的分选性双频介电测井解释方法研究

Sorting of Subpopulation Segment Line on Log - Probability Plots A Study on the Double Frequency Dielectric Log Interpretation

降尘粒度分选性与小于10μm粒级颗粒的含量负相关，相关系数为-0.9212，负相关性明显。

The gradation of the dust grain size and the content of grain less than 10 μ m are negative correlation .

与曲流河亚相相比，辫状河亚相砂岩的粒度较粗，分选性较好，砂体多次叠置而规模更大；

Furthermore , sorting of the sandstones in the braided river is better compared with that of in the meandering river system .

随着渗透率的增大，喉道分选性变差，并且平均喉道半径与渗透率在对数坐标系中具有较好的线性关系。

The sorting coefficient increases with permeability , and the relationship between the average throat radius and permeability are linear in logarithmic coordinates .

研究结果表明1.低渗透砂岩、低渗透凝灰质砂岩储层在孔隙结构类型、喉道与渗透率关系、分选性与渗透率关系等方面较为接近，而与低渗透砂砾岩相差较大。

Compared with low permeability glutenite , pore structure , relation of throat radius and permeability and separation of low permeability sandstone and low permeability tuffaceous sandstone is similar .

中部、南部风沙土分选性中等和较好，呈窄峰态和近对称的分布形式。

The sorting of the aeolian sand soil in the middle and southern desert is medium and better and the skewness is near symmetrical and the kurtosis is leptokurtic .

由于沉积过程中颗粒分选性不良，碎屑岩常因粘土矿物的混入往往强度不高，一般不能作为石料；

Because of the bed splitting of deposit , the strength of clastic rock is offen low by mixing with clay mineral and it is not used for building stone ;

两淮煤田新生界松散层底部含水层分选性差、粘拉含量高。

Analysis on core samples in Hualbei & Huainan Coalfield , Anhui Province shows poor sorting and high contents of clay minerals for the bottom aquifers of thick Cenozoic system .

研究结果表明，该区含油气储集层具有分选性差、泥岩含量低、物性差的特征，属于低孔-特低渗型储集层。

The result shows that there exist the features of poor sorting , low shale content and poor physical properties in the reservoirs , which belong to low-porosity and extra-low-permeability reservoirs .

相同河流亚相的河道微相与泛滥平原微相相比，前者的砂岩粒度较粗、分选性较好，发育槽状交错层理等大型层理构造；

In the same subfacies , grain size is larger and sorting is better in the channel sandstones which developed with large-scale cross-beddings such as trough cross-bedding , compared with sandstones in the flood microfacies .

粒度组成的优势组分受岩性及沉积动力的影响而有差异；粒度频率曲线总体以多峰型为主；粒级整体上较粗；总体分选性差；粒度参数散点图投影不集中。

Affected by lithology and sedimentary dynamics , the main components of grain-size composition were different . Most of the frequency curves were multimodal . The size fraction was relatively coarse grained and the sorting features were generally poor .

油藏主要岩石类型为长石砂岩，粒度主要以细粒为主，分选性较好，孔隙类型主要为原生粒间孔，其次为溶蚀孔隙，该区域延长组长2油层具有低孔低渗的特点。

The main reservoir rock types are feldspar sandstone , mainly is fine particle size , and fairly well sorted , the pore type is mainly primary intergranular pore , followed is dissolution pore , target area is low-permeability .

它们以良好的分选性和较高的结构成熟度、较细的粒度、较低的成分成熟度和大型交错层理的发育为特征，显示出较为明显的风成沉积特点。

They are mainly lithic arkosic sandstones and feldspar-lithic quartzose sandstones and are characterized by good sorting , higher textural maturity , fine granularity , lower compositional maturity and development of large-scale cross bedding , showing relatively distinct eolian features .

粒度分析表明，碎屑颗粒的分选性除了与沉积环境有关外，还明显受海平面升降、容纳空间的增长速率以及沉积物供给速率控制。

It is shown by analysing the grain size of the rocks that the well sorting of elastic grain , depending on the sedimentary environment , is evidently controlled by the eustasy , the growth rate of accommodation space as well as the supply rate of deposits .

而随孔喉增大，退汞效率缓慢增加，喉道分选性与驱油效率虽也呈正相关，但相关性较差。

The efficiency of mercury withdrawal increases sharply with the increase of porosity and permeability while increases slowly with the increase of the sizes of the pore and throat . The separating of the pore and throat is positively correlated to displacement efficiency , but such correlation is poor .

用变步长检测法分选周期性信号

Separation of periodic signals using variable detection step

仿真试验结果表明，依据伪模式分选周期性对称调制的脉冲的平均准确率可达到93%以上，平均漏选率低于5%。

Extensive experimental results show that the average accuracy of this algorithm for the non-traditional radar pulse deinterleaving in dense environments is higher than 93 % and average missing rate is less than 5 % .

碳氮化处理攀钢含钛高炉渣及其分选研究改性含钛高炉渣高温碳化低温氯化的研究

Study on High-temperature Carbonization and Low-temperature Chlorination on Modified Titanium Bearing Blast Furnace Slag

大量的仿真试验结果表明算法在密集信号环境下，分选PRI是周期性对称调制的雷达脉冲的平均准确率达到92%，平均漏选率只有5%，极大地提高了雷达脉冲分选的效率和准确性。

Extensive experimental results show that the averaged accurate rate of this algorithm for deinterleaving the complex radar pulses with a periodic and symmetrical PRI in dense environments is about 92 % and averaged missing rate is merely 5 % .

孔喉半径小、分选差、连通性差、渗流能力弱是砂体储层孔喉结构的基本特征。

The reservoir pore throat structure characterized by mini pore throat , poor sorting , poor connectedness and poor infiltrating ability .

为克服传统信号分选算法的局限性，本文提出了一种多参数的综合分选算法。

This paper introduces a multi-parameter synthetic signal sorting algorithm in order to overcome the limitation of traditional radar signal sorting algorithms .