吴起长8储层粘土矿物及敏感性实验研究

运用实验方法评价鄂尔多斯盆地中部吴起地区长8超低渗透砂岩储层的粘土矿物组成及对应的潜在储层伤害机理。采用铸体薄片、扫描电镜、X射线衍射等岩心分析技术,掌握了粘土的成分、含量等特征;通过25块岩心的流动评价实验,评价5口油井的储层敏感性特征;运用相关性评价方法,分析粘土矿物对储层物性和敏感性的影响。研究结果表明,吴起长8储层存在的4种主要粘土矿物中,伊/蒙混层含量最高,平均为47%;高岭石、伊利石和绿泥石其次,平均含量分别为24.6%、14.6%和13.8%;粘土矿物的类型、含量和产状对储层物性有重要影响,储层物性与绿泥石含量呈正相关,与伊利石、伊/蒙混层含量呈负相关;由于每种粘土的形态、性质、含量的差异,造成吴起长8储层的弱-中等偏弱速敏、中等偏强-强水敏、强-极强盐敏、弱-中等偏弱酸敏、弱-中等偏弱碱敏的趋势。     

TC4钛合金表面氧化皮去除

针对TC4钛合金在热成形过程中其表面易形成一层致密的氧化皮且氧化皮的表面形貌和厚度均受温度影响这一现象,采用先热碱洗后酸洗的工艺过程对TC4钛合金在不同温度下氧化后的氧化皮去除工艺进行了研究.采用光学显微镜对氧化皮形貌进行表征,研究了时间对去除氧化皮的影响,且通过国际上较先进的美国LECO公司RH-404定氢仪对去除氧化皮后钛合金的氢质量分数进行了测定.结果表明,通过采用先热碱洗后酸洗的过程,TC4钛合金表面的氧化皮可以完全被去除.此外,通过RH-404定氢仪测得合金中氢质量分数的变化不大.     

Composite iterative learning controller design for gradually varying references with applications in an AFM system简

Learning control for gradually varying references in iteration domain was considered in this research, and a composite iterative learning control strategy was proposed to enable a plant to track unknown iteration-dependent trajectories. Specifically, by decoupling the current reference into the desired trajectory of the last trial and a disturbance signal with small magnitude, the learning and feedback parts were designed respectively to ensure fine tracking performance. After some theoretical analysis, the judging condition on whether the composite iterative learning control approach achieves better control results than pure feedback contro! was obtained for varying references. The convergence property of the closed-loop system was rigorously studied and the saturation problem was also addressed in the controller. The designed composite iterative learning control strategy is successfully employed in an atomic force microscope system, with both simulation and experimental results clearly demonstrating its superior performance.     

药用聚异戊二烯橡胶细胞毒性的研究

以两种不同催化体系合成的药用聚异戊二烯橡胶(IR0307和IR80)为研究对象,分别以质量分数为0.9%的氯化钠注射液和纯化水为浸提介质,在两种浸提条件(在高压灭菌器内于121℃下浸提60 min或在密闭容器内于37℃下浸提24 h)下进行浸提处理,然后采用显微镜观察法和四唑盐比色法测定IR0307和IR80的体外细胞毒性,分析不同浸提条件下IR0307和IR80的细胞毒性反应等级。在药用聚异戊二烯橡胶生产中,建议控制催化剂的残留量以及对杂质和金属离子的含量和种类,使用洁净的非污染型防老剂和稳定剂。     

Effect of growth-interrupted method on quality of AlGaAs/GaAs multiple quantum wells prepared by MBE

AlGaAs/GaAs multi-quantum well （MQW） was prepared by molecular beam epitaxy（MBE） with growth-interrupted heterointerface （GIH） method and continuous growth （CG） method, respectively. The microstructures Of the MQWs were characterized by double-crystal X-ray rocking curve （DCRC） and atomic force microscopy （AFM）, and the photoluminescence （PL） properties of the MQWs were also studied. The MQWs grown with GIH method show that higher order satellite peaks of Pendelloesung fiinges are observed in DCRC, the roughness of surface is much reduced in AFM, and the full width at half maximum （FWHM） of exciton line is much narrower in PL. The results indicate that the GIH method reduces the monolayer growth step density at the heterointerface due to the migration of surface atomsfor a few minutes grower interruption, and substantially improves the quality of AlGaAs/GaAs MQWs.     

超声显微镜技术在铜/铝摩擦焊质量控制中的应用

铜/铝摩擦焊广泛用于电力行业接线端子的制作，其焊接质量直接影响着电力系统的安全运行。通过理论分析及试验方法探讨了超声波显微镜技术在铜/铝摩擦焊质量控制中的应用可行性，同时进行超声显微镜检测试验，发现将超声显微镜技术应用在铜/铝摩擦焊检测中，检测灵敏度高、分辨率好、检测结果直观。     

Characteristics of high hardness alumina coatings formed by gas tunnel plasma spraying

High hardness alumina coatings were formed at atmospheric pressure by gas tunnel plasma spraying, and the characteristics of these coatings were investigated. The hardness on the cross section of the alumina coating at a short spraying distance was more than 1300 HV, and the thickness of the hard layer increased with an increase of power input. The microstructure of the alumina coating was investigated by microscopy and x-ray diffraction (XRD) methods. It was ascertained that the cell size was small (∼10 μn), and α-alumina was dominant in the high hardness layer of the coating. Finally, the effect of plasma energy was estimated from these results.     

多晶体钛拉伸变形表面褶皱的形成及晶粒变形

用原子力显微镜对多晶体钛拉伸塑性变形中表面褶皱的形成及单个晶粒的变形进行了连续观察和测量.结果表明,表面褶皱随着应变量的增加而增大,而凹凸的相对位置关系不随变形的进行而变化.从单个晶粒来看应变量在0.1附近时由于孪晶的形成产生了新的凹凸,但对整体的表面褶皱凹凸位置关系没有大的影响.表面平均粗糙度和表面最大高低差随应变量的增加近似呈直线性增大,应变量在0.1左右时由于孪晶的形成,使粗糙度有较明显的增大.     

CRYSTALLOGRAPHIC ANALYSIS OF THE LATH MARTENSITE TRANSFORMATION IN Fe-Ni-Mn ALLOY

1.IntroductionBased on the concept of an invariant plane strain (IPS), phenomenological theory of martensite transformation (PTMT) is established[1-3]. In this case, an invariant plane is obtained by self-accommoda-tion effect between different martensitic variants, and the formula which reveals this self-accommoda-tion effect can be written as …