喷涂成形的MASiCp／Al复合材料显微组织

采用机械合金化方法制备ＳｉＣｐ／Ａｌ复合材料粉末，以喷涂方式成形，对不同喷涂方式得到的涂层的显微结构进行对比，并着重对爆炸喷涂所获得的独特组织结构－－Ａｌ２Ｏ３非晶相和弥散分布的ＳｉＣｐ，进行了观察和分析。     

混凝土轴向拉伸全曲线试验及装置

介绍了一种简易的卧式拉力试验装置，应用该装置，测得了尺寸１００ｍｍ×１０ｍｍ×５５０ｍｍ的棱柱体混凝土试件的轴向拉伸应力－应变全曲线，该装置可以推广应用于测定全级配混凝土大试件的轴向拉伸应力－应变全曲线。     

电弧炉埋弧冶炼工艺研究

本文介绍炉渣发泡性能的实验室研究和在普通功率小电炉上的工业性实验研究结果，指出了影响炉渣发泡的因素、炉渣发泡工艺的优越性以及一些促进炉渣发泡的添加剂及其加入方法。     

采用VB中的RDO实现与远程数据库的连接

经过分析比较 ,我们采用VB中提供的访问远程ODBC的RDO(远程数据对象 )接口 ,取代早期开发的网上用户查询软件中的DAO(数据存取对象 )接口 ,并且在采用时钟中断数据加入方法取代循环数据加入方法后 ,使与服务器建立联系的时间由原来的 17秒减少到 1秒之内 .     

Alkylammonium cations treating and K-Ar dating of illite from mudstones

Two kinds of mudstones from the Tarim Basin and the Tuha Basin were treated with C8 and C18 alkylammonium cations. Both of them were dated by the K-Ar method. One kind of rock contains mainly diagenetic illite, and the other contains mixed layer illite/smectite (I/S). Sample separation and alkylammonium cations treatment were performed first, and K-Ar dating followed. The result shows that fine-grained minerals have younger K-Ar ages and coarse-grained components have older ages. Plots of K-Ar age versus K2O (%) are linear, the range of diagenetic age can be estimated by extrapolation. The reaction results of the above samples are different after alkylammonium cations treatments. The samples containing mainly illite show a decrease in K2O and an increase in age by 1-25 Ma, suggesting that preferential exchange of young diagenetic clay rather than detrital clay by alkylammonium cations, therefore the age of diagenetic illite can be calculated directly by the % K2O and radiogenic 40Ar removed. For the I/S dominant samples, detrital illite was opened preferentially by C8 alkylammonium cations treatment. Detrital age can be calculated, but it is hard to obtain the diagentic age directly.     

海底热油管道悬空段停输温降过程的数值模拟

海底热油管道的悬空段由于没有周围泥沙的保温蓄热作用,停输之后管内温降比埋入海底泥沙中的管段快得多,故而其温降成为停输过程的关键。针对海底管线悬空段的热力特性,考虑原油凝固潜热对停输温降的影响,利用CFD软件,对其停输温降过程进行数值模拟。分析温降变化规律、不同海水温度对温降的影响,从而确定最佳停输时间,为海底热油管道制定再启动方案提供理论依据。     

基于模糊贝叶斯网络的水下生产系统 人因可靠性分析

近年,随着水下生产系统的应用范围不断扩大,人员在设计、运行、操作、维修维护等工作中造成的故障和失效问题逐渐凸显。人因导致的操作失效已成为水下生产可靠性中重要的风险因素。因此,有必要对水下生产系统进行人因可靠性分析,找出对人因失效概率影响较高的因素,提出改进措施,降低人为操作失误概率。本文通过构建水下生产系统人因风险因素体系,利用信度、效度指标验证了数据的合理性,并借助结构方程模型确定人因风险因素的权重系数,构建贝叶斯网络,利用模糊理论量化人因概率,实现对水下生产系统人因风险的预测和评估。最后通过南海某水下生产系统的实例分析,验证了该方法的适用性,为水下生产系统的人因风险预测和防范提供了参考依据     

The functional role of sodium taurocholate cotransporting polypeptide NTCP in the life cycle of hepatitis B,C and D viruses

Chronic hepatitis B, C and D virus (HBV, HCV and HDV) infections are a major cause of liver disease and cancer worldwide. Despite employing distinct replication strategies, the three viruses are exclusively hepatotropic, and therefore depend on hepatocyte-specific host factors. The sodium taurocholate co-transporting polypeptide (NTCP), a transmembrane protein highly expressed in human hepatocytes that mediates the transport of bile acids, plays a key role in HBV and HDV entry into hepatocytes. Recently, NTCP has been shown to modulate HCV infection of hepatocytes by regulating innate antiviral immune responses in the liver. Here, we review the current knowledge of the functional role and the molecular and cellular biology of NTCP in the life cycle of the three major hepatotropic viruses, highlight the impact of NTCP as an antiviral target and discuss future avenues of research.     

由圈长分布确定的偶图

阶为n的图G的圈长分布是序列(c1,c2,…,cn),其中ci是图G中长为i的圈数.得到如下结果:设A■E(Kn,r),|A|=4,n≤r≤m in{n 6,2n-9},则G=Kn,r-A是由它的圈长分布确定的.     

Study of Texture Segmentation and Classification for Grading Small Hepatocellular Carcinoma Based on CT Images

To grade Small Hepatocellular Car Cinoma(SHCC) using texture analysis of CT images, we retrospectively analysed 68 cases of Grade II(medium-differentiation) and 37 cases of Grades III and IV(high-differentiation).The grading scheme follows 4 stages:(1) training a Super Resolution Generative Adversarial Network(SRGAN)migration learning model on the Lung Nodule Analysis 2016 Dataset, and employing this model to reconstruct Super Resolution Images of the SHCC Dataset(SR-SHCC) images;(2) designing a texture clustering method based on Gray-Level Co-occurrence Matrix(GLCM) to segment tumour regions, which are Regions Of Interest(ROIs),from the original and SR-SHCC images, respectively;(3) extracting texture features on the ROIs;(4) performing statistical analysis and classifications. The segmentation achieved accuracies of 0.9049 and 0.8590 in the original SHCC images and the SR-SHCC images, respectively. The classification achived an accuracy of 0.838 and an Area Under the ROC Curve(AUC) of 0.84. The grading scheme can effectively reduce poor impacts on the texture analysis of SHCC ROIs. It may play a guiding role for physicians in early diagnoses of medium-differentiation and high-differentiation in SHCC.