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Search Results: 1 - 10 of 92412 matches for " 时建超 "
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白豹地区延长组长81储层成岩作用与成岩相研究
, 孙 卫, 卢德根, 李成福, 连运晓, 任大忠
地质科技情报 , 2013,
Abstract: 利用铸体薄片、扫描电镜、X-衍射、物性分析、高压压汞等分析化验资料,对白豹地区长81储层成岩作用和成岩相进行了分析研究。白豹地区长81储层砂岩经历了早成岩阶段A、B期和中成岩阶段A、B期的成岩演化过程,主要发育机械压实、胶结、溶蚀及交代成岩作用。其中压实作用和胶结作用是孔隙度降低的主要原因,分别造成了18.6%和13.3%的原生孔隙度损失,溶蚀作用形成的次生孔隙在一定程度改善了储层物性。研究区发育了5种不同成因类型的成岩相带,绿泥石膜胶结粒间孔相物性、含油性最好,为研究区最有利的成岩相带;水云母胶结粒间孔相为次有利成岩相带;长石溶蚀相也为研究区比较有利的成岩相带;压实压溶致密相和碳酸盐胶结致密相不利于储层发育。
预应力淬硬磨削加工表面微观形貌仿真与实验
邓延生,,修世,王雨
- , 2017, DOI: 10.12068/j.issn.1005-3026.2017.02.019
Abstract: 摘要 为了揭示预应力对磨削淬硬过程及表面微观形貌的影响机理,根据热弹塑性有限元理论,在不同大小的预应力作用下,以45钢试件为研究对象,使用DEFORM-3D进行单磨粒切削仿真,并结合预应力淬硬磨削实验,对等效应变、沟槽深度、表层微观组织及表面微观形貌进行分析.研究表明:施加预应力对热-机械等效应变影响较小,对微观组织转变影响明显,进而影响位错密度和晶粒体积,间接影响表面粗糙度;在预应力取值较小时,随着预应力增大表面沟槽深度减小,有利于减小表面粗糙度值,但在预应力超过某一数值后,会引起表面褶皱,反而使表面粗糙度数值增大.
Abstract:To reveal the effect of pre-stressing on grinding hardening process and micro-surface, single grain cutting simulations on test specimens made of 45 steel under action of different pre-stresses were carried out by using DEFORM-3D based on the thermal-elastic-plastic finite element theory. The equivalent strain, groove depth, surface layer microstructure as well as the micro-surface were analyzed by simulation and experiment of pre-stressed hardening grinding process. The results indicate that pre-stressing has little effect on thermal-mechanical equivalent strain, but has obvious effect on microstructure transformation which has indirect effect on surface roughness by affecting the dislocation density and grain size. As the pre-stress increases within a low range, the groove depth decreases and the surface roughness value reduces. However, once the pre-stress exceeds a certain value, surface fold appears and surface roughness value increases instead.
预应力淬硬磨削复合加工表面粗糙度试验
王雨,,邢韵,修世
- , 2016, DOI: 10.12068/j.issn.1005-3026.2016.09.014
Abstract: 摘要 以预应力淬硬磨削条件下试件表面粗糙度变化规律为研究对象,通过对45钢试件进行预应力淬硬磨削试验并进行表面粗糙度测量,分析了预应力淬硬磨削工艺参数(预应力、磨削深度、进给速度等)对试件表面粗糙度的影响机制.结果表明,粗糙度在试件表面分布并不均匀,其数值基本上都是从切入区到切出区逐渐增大的;适当增加预拉应力数值可以降低工件表面粗糙度,有效抑制试件表面微观裂纹的扩展,降低磨削温度,改善试件表面质量;预应力淬硬磨削中磨削深度和进给速度对表面粗糙度的影响与普通磨削一致,即随着磨削深度和进给速度增加表面粗糙度数值逐渐增大.
Abstract:Taking change law of specimen surface roughness under pre-stressed hardening grinding conditions as study object, 45 steel pieces were measured to analyze the influence mechanism of process parameters (pre-stress, grinding depth and feed speed) on the surface roughness. The experimental results show that the roughness is nonuniform and its value gradually increases from cut-in area to cut-out area. The increase of pre-stress value can decrease the surface roughness, inhibit surface microcosmic crack, reduce grinding temperature, and improve the surface quality of specimen. As same as to general grinding, the surface roughness gradually increases with the increase of grinding depth and feed speed.
致密砂岩储层孔隙结构与可动流体赋存特征:以鄂尔多斯盆地华庆地区长63 致密砂岩储层为例
,,,任大忠,刘登科,,,
- , 2018,
Abstract: 应用核磁共振实验对鄂尔多斯盆地华庆地区长63 致密砂岩储层可动流体赋存特征进行了研究,并结合铸体薄片、图像孔隙、高压压汞、恒速压汞及真实砂岩微观水驱油实验,对可动流体赋存特征的微观孔隙结构影响因素开展了探讨。结果表明:华庆地区平均孔隙度为8.71%,平均渗透率为0.148×10-3μm2,可动流体饱和度平均值为33.89%;主要孔隙组合类型为残余粒间孔型、溶蚀孔型及孔隙+裂缝型,不同孔隙类型的储层可动流体赋存特征各异;孔喉大小及配比关系对可动流体饱和度具有重要影响,喉道半径大于水膜厚度的有效喉道对储层可动流体有决定性作用。
基于铸体薄片资料的砂岩储层孔隙度演化定量计算方法——以鄂尔多斯盆地环江地区长8储层为例
,,,,,,席天德,何清阳,,,
沉积学报 , 2014,
Abstract: 利用铸体薄片资料进行储层孔隙度演化定量计算是一项重要的成岩演化和储层模拟技术,但由于参数确定和计算方法存在的问题,导致结果准确性较差。基于此,在分析前人计算方法及其误差的基础上,确定了计算参数的选用,改进和完善了计算方法与结果检验方法的应用。在初始孔隙度的确定上,相对赋一固定值作为所有样品初始孔隙度或Scherer拟合公式,根据Beard和Weyl湿砂填集实验恢复初始孔隙度具有较高的精度;在考虑压实过程中岩石表观体积缩小的情况下,推导了压实、胶结损失孔隙度与溶蚀增加孔隙度计算公式,并给出了忽略岩石表观体积变化时孔隙度演化分析的误差来源和可能的误差大小范围;结果检验方面,摒弃了以往忽略溶蚀增加孔隙度而简单进行粒间孔隙度与和氦孔隙度对比的较为粗略的方法,建立了考虑各种成岩作用结果和成岩过程中岩石表观体积变化情况下的结果检验方法。应用该方法对鄂尔多斯盆地环江地区长8储层孔隙度演化进行计算,结果与岩芯氦孔隙度相比,绝对误差-1.1%,相对误差15.3%,取得了良好的应用效果。
冬小麦品种高低分子量麦谷蛋白亚基的分子标记检测
胡凤灵,何中虎,,刘志,,夏先春
麦类作物学报 , 2011, DOI: 10.7606/j.issn.1009-1041.2011.06.013
Abstract: 为了通过育种手段尽快改良小麦加工品质,利用Dx5、By8、By9、By16、GluA3、GluB3和1B·1R的特异性分子标记对221份中国冬小麦品种(系)进行HMWGS、LMWGS基因的等位变异及1B·1R易位系检测,结果表明:(1)在所检测的小麦品种(系)中,含Dx5、By8、By9的材料依次为58、79、119份,频率依次为26.2%、35.7%、53.8%;未检测到含By16的材料。(2)在所检测的小麦品种(系)中,GluA3位点上,含GluA3a、GluA3b、GluA3c、GluA3d的材料依次为30、1、111、79份,频率依次为13.6%、0.5%、50.2%、35.7%;未检测到携带GluA3e、GluA3f、GluA3g的材料;GluB3位点上,含GluB3d、GluB3g、GluB3f、GluB3h的材料较多,依次为64、47、18、11份,频率依次为29.0%、21.3%、8.1%、5.0%,含GluB3a、GluB3b、GluB3c、GluB3i的材料很少,依次为1、3、2、4份,频率依次为0.5%、1.4%、0.9%、1.8%;含1B·1R易位系的材料(即GluB3j类型)71份,频率为32.1%;未检测到含GluB3e的材料。(3)在所检测的小麦品种(系)中含最优亚基组合By8、Dx5、GluA3d、GluB3d的材料只有2份,频率为0.9%,说明聚合多个优良基因的小麦品质改良工作急需加强。
南海共轭被动大陆边缘洋陆转换带构造特征
高金尉,,彭学,董冬冬,,贾连凯,周金扬
大地构造与成矿学 , 2015, DOI: 10.16539/j.ddgzyckx.2015.04.001
Abstract: 南海被动大陆边缘洋陆转换带与典型洋陆转换带相比有其特殊性,南海共轭被动陆缘的构造运动、火山活动以及海底地形的差异表明南、北洋陆转换带具有不同的构造特征。本文利用多条多道地震反射剖面和重力异常数据,研究南海共轭被动陆缘洋陆转换带构造特征差异性,探讨南海被动陆缘的类型和伸展模式。南海北部陆缘洋陆转换带可以划分为两种类型:一类以前缘铲状断块为界与洋壳区分,发育有裂陷期断陷、火山带(埋藏海山带)和不十分发育的向海倾的掀斜断块带;另一类则以海山为界,发育裂陷期断陷、宽缓的低凸起和火山或海山。深反射地震特征显示出了下地壳高速层的存在。南部以裂陷期断陷和明显的向海倾的掀斜断块为特征,以前缘铲式断层为界与洋壳区分。自由空间重力异常由陆向海从高异常值过渡为低异常值再到高异常值,预示着地壳由陆壳→过渡壳→洋壳的变化。结果表明,南海共轭被动陆缘更可能属于非火山型被动大陆边缘,其洋陆转换带的构造差异主要受岩石圈差异伸展变形控制。
昆虫酚氧化酶原活化及其在免疫中的作用

应用昆虫学报 , 2000,
Abstract:
Determination of Organophosphorus Pesticide Residues in Tobacco by High Performance Liquid Chromatography- Tandem Mass Spectrometry
高效液相色谱-串联质谱法测定烟草中有机磷农药的残留量

LIU Yingwen,DING Shichao,DU Wen,YIN Donghong,LIU Jianfu,
刘莹雯
,,杜文,银董红,

色谱 , 2006,
Abstract: A novel and rapid method based on high performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed for determination of organophosphorus pesticide residues (OPs) in tobacco. The OPs were extracted from tobacco samples by acetonitrile under ultrasonication. The extractive was determined by high performance liquid chromatography using methanol-water (containing 0.1% ammonium acetate) (95:5, v/v) as mobile phase. The OPs were detected using a tandem mass spectrometer with electrospray ionization in multiple reaction monitoring (MRM) mode. The OPs, such as dimethoate, trichlorfon, chlorpyrifos, methamidophos and acephate could be detected quantitatively within 2.5 min. The linear calibration curves were obtained in the entire range (1-200 microg/L) for all the above pesticides (r > 0.998). The average recoveries in tobacco obtained were ranged from 77% to 104%. The limits of detection were between 1.0 microg/kg and 5.0 microg/kg.
微分算子和直线拟合在十字丝中心定位中的应用
Application of Differential Operator and Linear Fitting in Crosshair Center Pinpoint
 [PDF]

刘博,
Software Engineering and Applications (SEA) , 2015, DOI: 10.12677/SEA.2015.43007
Abstract: 为了满足镜头中心偏差测量中十字丝中心精确定位的要求,本文提出了一种基于微分算子和直线拟合的十字丝中心定位方法。根据十字丝成像的特殊性,首先,使用微分算子分别在X方向和Y方向求差分得到十字丝X方向和Y方向的边缘。接着,采用正交最小二乘法将刚刚得到的X方向和Y方向的边缘分别拟合为X方向和Y方向上的两条直线方程。最后,计算两条拟合直线的交点作为十字丝的中心。实验结果表明:在分辨率为1292 × 964像元为3.75 μm × 3.75 μm的CCD采集到的图像中十字丝中心的定位精度小于1个像素,在镜头中心偏差测量过程中其定位精度小于2 μm。基本满足镜头中心偏差测量对十字丝中心定位精度高、抗干扰能力强、重复性好等要求。
In order to satisfy the requirement of crosshair center pinpoint for lens decentration measurement, a crosshair center pinpoint method based on differential operator and linear fitting is proposed. First, the edges of crosshair in both X and Y directions can be obtained by using differential operator to compute the difference in both X and Y directions. Then, two linear equations in both X and Y directions are fitted with orthogonal least square method using the edges obtained. Finally, the intersection point of the two linear equations is used as the crosshair center. Experimental results indicate that the precision of the crosshair center pinpoint is less than one pixel in the images grabbed by the CCD whose resoluntion is 1292 × 964 pixel and pixel size is 3.75 μm × 3.75 μm and the precision of pinpoint is less than 2 μm in lens decentration measurement. It can satisfy the system requirements of non-contact, online, real time, higher precision and rapid speed, as well as strong anti-jamming and stabilization.
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