多子波分解技术在储层预测中的应用——以塔里木盆地SN区一间房组为例

塔里木盆地SN区已钻井揭示,在一间房组强波谷之中有良好的油气显示,由于T₇⁴界面的强波峰屏蔽效果,振幅属性的强弱不能有效地预测储层分布,而正演结果则具有多解性。利用多子波分解与重构及第三分量预测了研究区储层分布。利用地震下半周轨迹属性预测的储层边界和发育区与第三分量预测结果基本吻合,与钻井揭示的储层也吻合,强振幅分布区域为有利储层发育带。因此,采用子波分解方法对数据进行处理,去除强轴影响,可得到较好的储层识别效果。     

复杂非杆件结构配筋计算方法及应用

针对非杆系结构配筋设计难度较大的问题,采用确定复杂结构任意截面配筋区域的算法,并以ANSYS为二次开发平台编制了非杆系结构配筋计算程序,提出了非杆系结构钢筋布王优化方法.算例结果表明,该法简便易行、合理、实用,效率高.     

DM3 EJB容器的安全体系结构的实现技术

安全服务是EJB容器所应提供的一个基本服务。该文为EJB容器设计了一个灵活的、可扩展的安全体系结构。它利用域把EJB容器和安全服务分割开来,不仅可以满足对安全服务的多种要求,还可以透明地添加新的安全服务。     

双氧水/活化剂对PVA的降解作用

探讨双氧水／活化剂对PVA浆料的降解作用。通过采用双氧水／活化剂对涤棉织物进行退浆,测试分析双氧水、活化剂用量、退浆温度、时间和pH值对PVA降解率的影响。结果表明,双氧水／活化剂法退浆的较好工艺条件是：双氧水4mL／L,活化剂7．5g／L,温度100℃,pH值5,时间20min。指出：与其他三种传统退浆方法相比,双氧水／活化剂退浆具有退浆率高,白度好,强力损伤小,退浆液中PVA降解率高和退浆液为中性,可以减轻退浆后的水洗负担,有利于实现清洁化前处理生产等优点。     

Adsorption of chitosan onto carbonaceous surfaces and its application: atomic force microscopy study

The adsorption of chitosan onto highly ordered pyrolytic graphite(HOPG) surfaces and its applications have been studied by atomic force microscopy (AFM). The results indicated that chitosan topography formed on the HOPG surface significantly depends on the pH conditions and its concentration for the incubation. Under strongly acidic conditions (pH < 3.5) and at a concentration of 1 mg ml?1, chitosan formed into uniform network structures composed of fine chains. When the solution pH was changed from 3.5 to 6.5, chitosan tends to form a thicker film. Under neutral and basic conditions, chitosan changed into spherical nanoparticles, and their sizes were increased with increasing pH. Dendritic structures have been observed when the chitosan concentration was increased up to 5 mg ml?1. In addition, the chitosan topography can also be influenced by ionic strength and the addition of different metal ions. When 0.1 M metal ions Na+, Mg2+, Ca2+ and Cu2+ were added into the chitosan solution at pH 3.0 for the incubation, network structures, branched chains, block structures and dense networks attached with many small particles were observed, respectively. The potential applications of these chitosan structures on HOPG have been explored. Preliminary results characterized by AFM and XPS indicated that the chitosan network formed on the HOPG surface can be used for AFM lithography, selective adsorption of gold nanoparticles and DNA molecules.     

SiO2/Si波导应力双折射数值分析

采用有限元法对SiO2/Si掩埋光波导制备工艺中的应力变化进行了系统的分析,在此基础上,应用有限差分束传播法(FDBPM)对应力光波导的双折射进行了计算.结果表明上包层的玻璃化过程是SiO2/Si波导形成水平方向和垂直方向应力差的主要原因,相应的应力双折射系数B在10-4量级.进一步的分析表明上包层B,P重掺杂可明显减小波导的双折射系数.     

豆蛋白婴儿配方奶的研究

介绍了豆蛋白婴儿配方奶的配方设计,设计依据和工艺流程。同时对该产品在保质期内和生产中容易出现的问题进行了讨论。该产品为即食配方奶,方便饮用,快捷卫生,不但适合普通婴儿食用,更适合患者乳糖不耐症和乳蛋白质过敏婴儿。     

确定性反演和随机反演对井约束条件的需求分析

叠后数据地震反演一般利用测井信息对反演结果进行约束,不同的反演方法对井约束条件的需求存在差异,不恰当地使用井约束条件将严重影响反演结果的准确性。基于理论数据分析了确定性反演和随机反演中多井约束对反演精度的影响。研究表明,在确定性反演中,多井约束将导致反演结果可信度降低,相比多井约束的反演结果,单井约束更能准确描绘出相对阻抗差异;在随机反演中,约束井数目越多,不确定性越低,反演精度越高。     

In vitro and in vivo activity of essential oil from dill (Anethum graveolens L.) against fungal spoilage of cherry tomatoes

The objectives of present study were to determine the antifungal activity in vitro of the essential oil extracted from the seeds of dill (Anethum graveolens L.) and to evaluate its antifungal activity in vivo as a potential food preservative. The antifungal activity of this oil was tested by poisoned food technique against Aspergillus flavus, Aspergillus oryzae, Aspergillus niger and Alternaria alternata. The wet and dry mycelium weight of the tested fungi was also determined in a liquid culture to evaluate the antifungal activity. The minimum inhibitory concentration of oil for the four tested fungi was found to be 2.0 μl/ml, and the mycelial growth inhibition was determined at day 9. Observations on the microstructure of A. niger using light and scanning electron microscopes revealed degenerative alterations in the conidial heads and hyphal morphology after oil treatment, including distorted conidial heads, decreased hyphal diameters, shriveled hyphal aggregates, and swelling of the hyphal wall. The effect of the essential oil on inhibition of decay development on cherry tomatoes was tested in vivo by exposing inoculated and control fruit to essential oil vapor at 120 μl/ml and 100 μl/ml concentrations, respectively. Thus, the essential oil of dill could be used to control food spoilage as a potential source of food preservative.     

基于双目视觉机器人TCP校准方法研究

工业机器人末端执行器位置参数(TCP)是机器人离线编程及机器人末端工具误差校正的基础,研究快速、准确的TCP校准方法对保证工业现场环境下机器人系统顺利正常工作至关重要。以双目视觉测量为基础,结合空间坐标变换理论与机器人运动学,提出了一种应用于工业制造现场的机器人TCP参数快速自动校准方法。此方法具有非接触测量、校准速度快、精度高等优点,减少了传统接触式TCP校准过程中误差因素,并且克服了其标定速度慢,标定精度不足等缺点。结合ABB工业机器人对该方法进行验证实验,实验结果表明:对于直径为10 mm的末端工具,提出方法校准精度相对于传统接触式标定有很大的提高,可以满足工业现场高精度的、快速的TCP校准要求。