Diffus相关论文
High-strength diffusion bonding of oxide-dispersion-strengthened tungsten and CuCrZr alloy through s
Oxide-dispersion-strengthened tungsten(ODS-W)and a CuCrZr alloy were bonded by a three-step pro-cess:(i)surface nano-act......
Spatial Heterogeneity of Agricultural Science and Technology Parks Technology Diffusion: A Case Stud
Agricultural science and technology parks(ASTPs) represent an important growth pole in China’s agricultural modernizati......
目的回顾性分析韦氏环与结内弥漫性大B细胞淋巴瘤的临床特征和预后。方法分析病理确诊的韦氏环和结内弥漫性大B细胞淋巴瘤181例资......
With the rapid accumulation of high-throughput metagenomic sequencing data,it is possible to infer microbial species rel......
α- and β-Ga2O3 were prepared via a precipitation method.The as-prepared α- and β-Ga2O3 were characterized by X-ray d......
Spatial Heterogeneity of Agricultural Science and Technology Parks Technology Diffusion:A Case Study
Agricultural science and technology parks(ASTPs)represent an important growth pole in China's agricultural modernizatio......
Photometric stereo is a fundamental technique in computer vision known to produce 3D shape with high accuracy. It uses s......
Effect of Hydrothermal Treatment on Suppressing Coking of ZSM-5 Zeolite during Methanol-to-Propylene
Fresh ZSM-5 zeolite catalysts were pretreated at 460℃ and 500℃ with various cumulative amount of water feed (CAWF) in ......
Influence of lesion ratio on diagnostic performance of in-phase/opposed-phase imaging and apparent d
Background The usefulness of in-phase/opposed-phase imaging and diffusion weighted imaging (DWI) in differentiating beni......
目的探讨扩散加权成像(DWI)在早期诊断早产儿局灶性脑白质损伤(punctate white matter damage,PWMD)及其预后的价值。资料与方法搜......
采用原位红外光谱仪并结合热重分析仪和程序升温氧化-质谱联用仪的测量结果对国Ⅳ柴油机颗粒物表面官能团在颗粒物氧化反应过程中......
沿海地区的软弱土以及不良土是工程建设中常遇到并且比较棘手的问题,特别是处理场地受限于轨道交通等地下构筑物限界时,难度更大。......
目的利用扩散张量成像(DTI)检查单眼屈光参差性弱视与斜视性弱视患儿视放射发育情况,比较两种弱视患儿视觉损害发生机制的异同。方......
针对一般蠕虫不能感知目标环境及其改变,从而不能选择有效的扩散策略问题,采用加权树建模方法,给出一种蠕虫自动扩散模型,描述蠕虫“智......
马立克氏病病毒(MDV)被膜蛋白VP22被证实能在细胞间高效转导,为了进一步证明VP22能够作为蛋白转运的载体,将4种不同的异源蛋白与MD......
利用中尺度气象模式RAMS和大气扩散模式HYPACT,结合甘肃省-中科院科技合作项目"兰州市大气污染及对策研究"于2000年12月在兰州市城......
目的:在3.0T磁共振上,分析评价自由呼吸背景抑制弥散序列在胰腺癌中的应用价值。方法:20例正常志愿者行常规T1WI、频率饱和脂肪抑制T......
文中研究自由体积在流体的宏观性质,尤其是传递性质中的应用,给出了自由体积与Helmholtz自由能、过量Gibbs自由焓G~B等热力学基本......
To study the flow characteristics of three-phase foam in gob area,different perfusion experiments in coal mine gob were ......
本文在测定Al-6Mg-1Zn合金超塑拉伸性能的基础上,利用金相显微镜对一系应变速率下超塑变形试样进行了晶粒度、等轴比的测定。结果......
目的探讨多模式磁共振成像(MRI)检查在脑静脉窦血栓诊断中的优势。方法回顾分析23例脑静脉窦血栓形成患者的影像学资料,包括MRI平扫......
应用多元扩散偶-电子探针微区成分分析技术,测定了Ti-Ni-Nb三元系相图700℃等温截面,确定了该三元系相图的700℃等温截面的12个单相区,23个两相区和10个三相......
在分析和计算机准三维(2.5D)针刺整体炭毡、低密度炭毡孔隙结构的基础上,研究不同温度和压力下反应气体在上述预制体孔隙中的扩散行......
用Ti箔在1323K进行Si3N4与Ni之间的连接,并对连接界面区的微观形貌,成分分布和界面反应产物进行了分析研究。结果表明,通过Ni与Ti之间的相互扩散,在Si3N4表面形......
用密度泛函理论(DFT)结合平板周期模型方法,对Cu在Cu(111)表面fcc洞位、hcp洞位的吸附模型进行了几何优化,并用从fcc洞位到hcp洞位过渡态......
目的显示不同脑内疾病可表现为相似的脑内弥漫性CT改变,材料与方法:对15例患者脑CT平扫与增强扫描,其中包括4种病变,脑囊虫病,脑转移瘤和脑胶质......
对用改进的Bridgman法生长的Pb[(Zn1/3Nb2/3)0.91Ti0.09]O3(PZNT91/9)单晶用Laue衍射法和XRD衍射曲线定向,取(001)晶片研究材料的电学性......
目的:应用磁共振弥散张量成像技术(DTI)观察皮质下缺血性血管性痴呆(SIVD)患者脑白质损害程度,探讨DTI对SIVD白质损害的评估及与阿尔茨......
目的:研究直肠腺癌18F-FDG PET/CT SUVmax和DWI ADC分别与病理分级的相关性,并探讨直肠腺癌SUVmax和DWI ADC值之间的定量关系。方法......
The functional activity and morphological integrity of the porcine thyroid tissue could be maintained up to 96 hrs with ......
目的:探讨前列腺弥散加权成像测得的ADC值结合常规MRI对鉴别前列腺癌和前列腺增生的价值。方法:选择前列腺增生病人15例,前列腺癌病......
用普通电阻炉加石墨保护的方法成功地在铁素体基灰铸铁及珠光体基灰铸铁基体上制备了镍基自熔性合金粉末复合材料。利用光学显微镜......
借助于板拉伸试验,研究了0.3mm厚马氏体时效不锈钢冷轧薄带材的拉伸变形特征。结果表明薄带材板拉伸试样较高的宽厚比(w/t)强烈约束拉......
Coexpression of MYC and BCL-2 predicts prognosis in primary gastrointestinal diffuse large B-cell ly
AIM:To investigate whether MYC and BCL-2 coexpression has prognostic significance in primary gastrointestinal diffuse la......
Effect of Hydrothermal Treatment on Suppressing Coking of ZSM-5 Zeolite during Methanol-to-Propylene
Fresh ZSM-5 zeolite catalysts were pretreated at 460 ℃ and 500 ℃ with various cumulative amount of water feed(CAWF) in......
基于非正交曲线坐标下水流与污染物扩散输移的深度平均数学模型,采用k-ε双方程湍流模型和速度-水深耦合算法,应用于实验室连续弯......
目的比较不同的影像学检查方法评估膝关节前交叉韧带损伤重建术后手术效果的效能。方法选择2017年1月至2018年9月新乡医学院第三附......
给出了一维扩散方程σu/σt=ασ^2u/σx^2的一种三阶格子Botzmann模型(D1Q3模型).采用Chapman-Enskog多尺度展开技术,导出了该模型......
采用JEM-2010高分辨透射电镜研究了超低碳钢固溶处理后时效过程中组织的变化及铜的析出颗粒结构。探讨了时效时间对铜偏聚区的影响......
二氧化碳分子选用EPM2模型,乙醇分子选用TraPPE-UA模型,采用分子动力学模拟技术,探讨了超临界二氧化碳的自扩散系数及乙醇—超临界......
磁共振扩散峰度成像(diffusional kurtosis imaging,DKI)是一种扩散张量成像(diffusion tensor imaging,DTI)技术的延伸,对于描绘......
目的:探讨3.0T磁共振动态增强扫描(dynamic contrast-enhanced magnetic resonance imaging,DCE-MRI)联合扩散加权成像(diffusion-weig......
进行了可用于太阳电池的应变量子阱的退火性质研究,并对传统数据分析方法进行了改进。提出一种新的应变量子阱热退火扩散激活能的拟......
本文运用Monte Carlo方法模拟了三种不同情形下扩散控制的胶体聚集过程;(1)胶体扩散系数与聚集数的平面方成反比;(2)胶体扩散系数与聚集数成指数关系......
A silicide coating was prepared on the surface of the Nb521 alloy by the complex pack cemented method. The oxidation res......
The Al-Si alloy with high Si content was prepared by pressure infiltration.Microstructure observation shows that three-d......
采用溶胶-凝胶法制备Li3-2xMgxV2(PO4)3/C(x=0、0.01、0.03、0.05)复合材料,并通过X射线衍射(XRD)、扫描电镜(SEM)和电化学测试等测试手段......
采用直接水冷半连续铸造法制备AA4045/AA3003铝合金包覆铸锭,对合金界面组织、温度分布、成分分布及力学性能进行研究。结果表明,......
目的探讨扩散加权成像(diffusion weighted imaging,DWI)及表观扩散系数(apparent diffusion coefficient,ADC)值在评价肝泡状棘球......
分析了满足Rayleigh-Debye(RGD)近似条件的稀多分散壳层球粒悬胶液,导出了一个新的作为溶剂折射率n0函的“测量静态结构函数S^M(K),并用以计算稀悬胶液的多分散性......