Removal of imidacloprid and acetamiprid from tea infusions by microfiltration membrane

Removal of imidacloprid and acetamiprid in tea infusions by microfiltration membrane using dead‐end model was investigated in the present study. The results showed that microfiltration significantly promoted the removal of both pesticides (P < 0.05) in tea infusions. Furthermore, the extent of removal was strongly influenced by the pore size of membrane, operational pressure and the concentrations of tea infusions. The initial concentration of imidacloprid and acetamiprid showed no significant effect on their removal rates. The maximum removal rates were 79.7% for imidacloprid and 81.9% acetamiprid. The changes in major chemical components of tea infusions after microfiltration were evaluated. The results indicated that microfiltration caused no considerable changes in total polyphenols and total free amino acids, and small but statistically significant losses (6.3–18.0%) of eight catechins and three methylxanthines when filtration volume reached to 200 mL. The present study validated the application of microfiltration as a potentially feasible and promising method for the removal of imidacloprid and acetamiprid residues from tea infusions.     

山西铝厂氧化铝生产铝土矿资源保证措施

通过扩大对铝土矿资源的对策和措施分析 ,为扩大山西铝厂氧化铝规模提供资源保障     

爆震室内混合物填充特性研究

爆震室内混合物的填充过程是PDE工作循环中的重要一环.为了研究爆震室内的燃料和氧化剂的填充特性,采用大型计算流体力学仿真软件对爆震室内燃料和空气的填充过程进行了数值模拟.计算结果表明,在设定的计算条件下,填充距离随填充时间的增加近似线形增大,填充完毕所需的填充时间约0.125s,且从距封闭端250mm开始,填充后的乙炔质量分数稳定在0.11.     

关于征地制度的思考

针对当前农村土地问题的现状．认为调整农村土地关系改革土地制度是解决当前农村问题的关键之一。介绍苏格兰土地改革的经验．提出农村土地转为非农用地的交易中国家应实行限制性措施．可尝试建立“国家失地农民账户”和“国家失地农民保障基金”．从而合理分配土地交易产生的级差收益保障失地农民的合法利益。     

Multicasting in a class of multicast-capable WDM networks

Multicast is the ability to transmit information from a single source node to multiple destination nodes. Multicast can be supported more efficiently in optical domain by utilizing the inherent light-splitting capacity of optical switches than by copying data in electronic domain. In this paper, we study multicast communication in a class of multicast-capable WDM networks (i.e., the networks that have light splitting switches) with regular topologies under some commonly used routing algorithms. Upper and lower bounds on the minimum number of wavelengths required are determined for a network to be rearrangeable for arbitrary multicast assignments, and compared with those WDM networks without light splitting switches. Our results indicate that in most of the networks we study, the number of wavelengths required can be significantly reduced by utilizing light splitting switches     

实时数字引导中的数据处理

阐述了航天统一测控站在卫星和飞船发射过程中，实时数字引导中的数据处理。其中包括数据变换、数据的时间比对、外推估值等方法，提高了数字引导精度和设备的角度捕获能力。     

远程公文传输解决方案

以黑龙江省审计厅办公自动化系统为背景,简要说明了公文远程传输的实现内容和方法。内容包括:公文远程传输对于建立办公自动化系统的重要意义;远程传输的功能需求;以及实现远程传输的基本方法。     

e-LITE： A Concurrent Engineering Method Dedicated to E-learning Training Development for the Enhancement of Research Project Results

Scientific research projects aim to produce new knowledge generally in domains of high specialization.Some of these projects have goals of improving the performance of companies.In this case,the issues of the capitalization and transfer of scientific knowledge and its rapid transformation into professional skills are directly addressed.However,there is no method to derive e-learning teaching material from project results.So,this paper presents the e-LITE Method and its application to the ISTA3 project to support the process of developing a e-learning training.This application has allowed us to highlight the contributions of the method that promotes better knowledge sharing between partners of a research project and the development and transfer of research results to the professional world.So,after the presentation of the method,an application to the ISTA3 project will be presented.     

软件过程改进方法研究与实施

信息化作为军事变革的本质和核心,是高新武器装备发展的方向,而软件又是信息化武器装备的中枢神经。文章介绍了军用软件改进方法的研究与实施,从软件的实施规划、过程定义、试点实施、全面推广入手,从而提高了军用软件的质量。