摘要：The laminate structure was applied to improve the mechanical properties of Mg-8.0 Gd-3.0 Y-0.5 Zr *** types of laminate structures only with different distribution positions of fine grains were produced by friction-stir *** show that the trilayer structure sample exhibits an excellent strengthductility synergy compared to the homogenous structure and bilayer *** enhanced mechanical properties are resulted from the hetero-deformation induced(HDI)stress strengthening and strain hardening which would be enhanced by increasing the quantity of *** observations suggest a crucial role of the number of interfaces in designing the laminate structure.

摘要：真菌毒素作为真菌次级代谢产生的一类化合物,其化学结构稳定并可在食物链中积累,严重威胁人类和禽畜健康并造成重大经济损失。生物酶降解法因安全性高、环境友好等优点而在真菌毒素脱毒方面展现出极大的应用前景。本文系统总结黄曲霉毒素、玉米赤霉烯酮、脱氧雪腐镰刀菌烯醇、赭曲霉毒素和伏马菌素等常见真菌毒素降解酶的挖掘和功能分析,重点关注利用X射线晶体学等方法解析降解酶三维结构、揭示其催化机制的研究进展,并比较分析计算方法预测的结合口袋与试验确定的活性中心;阐述基于蛋白质结构的理性设计策略在真菌毒素降解酶改造中的应用,并讨论利用计算生物学方法预测蛋白质结构和功能、解析酶的作用机制并指导降解酶设计的潜力。本文可为解决食品和饲料中的真菌毒素污染问题提供新思路。

摘要：年龄相关性黄斑变性(AMD)是目前全球致盲的主要病因之一。抗血管内皮生长因子(Anti-VEGF)疗法已成为新生血管性AMD的一线治疗方案。考虑到抗VEGF药物的费用昂贵,患者需要长期甚至终身接受反复抗VEGF注射治疗,了解真实世界中抗VEGF的治疗情况,对于指导临床实践、改善患者诊疗路径乃至卫生决策都十分重要。近年来基于电子化信息平台的新生血管性AMD数据分析研究向我们展现了不同国家和地区新生血管性AMD的流行病学、真实世界抗VEGF的治疗情况以及医疗支出等,笔者就此作一综述。

摘要：In this study, a novel hybrid intelligent mining system integrating rough sets theory and support vector machines is developed to extract efficiently association rules from original information table for credit risk evaluation and analysis. In the proposed hybrid intelligent system, support vector machines are used as a tool to extract typical features and filter its noise, which are different from the previous studies where rough sets were only used as a preprocessor for support vector machines. Such an approach could reduce the information table and generate the final knowledge from the reduced information table by rough sets. Therefore, the proposed hybrid intelligent system overcomes the difficulty of extracting rules from a trained support vector machine classifier and possesses the robustness which is lacking for rough-set-based approaches. In addition, the effectiveness of the proposed hybrid intelligent system is illustrated with two real-world credit datasets.

摘要：[Objective] The aim of this article is to establish a cell suspension culture system for eggplant. [Method] Using orthogonal design, appropriate media were screened for callus induction, subculture and cell suspension culture. [Result] The appropriate medium for callus induction was MS supplemented with 0.2 mg/L 6-BA and 0.2 mg/L NAA; the appropriate subculture medium was MS supplemented with0.2 mg/L 6-BA, 0.2 mg/L NAA, and 0.1 mg/L KT; the suitable medium for cell suspension culture was liquid MS medium supplemented with 0.4 mg/L NAA and 0.2mg/L. Cell growth curve was similar to ＂S＂ shape in the above suspension *** cell growth included four phases, the initial phase（1-3 d）, the logarithmic phase（3-7 d）, the steady phase（7-8 d）, and the decline phase（8-11 d）. With the increasing culture time, the number of suspension cells increased, and it reached the maximum value at the 7thd, about 3.8 ×105cells/ml. Then the number of cells began to decline rapidly. The cell vigor was the highest at the initial phase. Suspension cells grew best in the liquid MS medium supplemented with NAA（0.4 mg/L）and 6-BA（0.2 mg/L）. The mitotic index reached the maximum, about 4.1% in the above medium, which suggested that this medium was suitable for cell suspension culture of eggplant. [Conclusion] Cell suspension culture system of eggplant provides a significant method for eggplant biotechnology. Genetic transformation and mutants screening can be carried out with this system.

摘要：针对农机模型参数化设计过程中涉及参数传递困难、关联性差,对设计人员的专业素质要求高等问题,构建了一套模型参数化设计交互式创建系统。该系统运用知识元设计的理念,通过人机交互式的方法创建设计知识,实现模型的个性化设计与参数化建模。采用Visual Studio平台下的***为开发语言,结合SolidWorks的二次开发技术与MySQL数据库管理实现模型参数化设计的资源化封装,以弱化专业背景知识的限制。以谷物收获机械的切割装置为测试对象,分析零件之间的参数关系,明确参数设计规则,通过模型预处理标记设计参数,循环遍历模型数据集提取参数基本信息,建立人机交互操作界面,按照参数分类的要求完成设计参数定量、定性的知识信息表达。实例分析证明了该系统的可行性与有效性,并且易于理解和应用,可为农机装备的设计重用技术提供技术支持。

摘要：为准确分析电力变压器在地磁感应电流(GIC)作用下的温升特性,该文通过建立某500kV三相共体油浸式电力变压器的电磁-流热场耦合三维仿真模型,计算变压器满负载运行及不同GIC作用下其内部构件的损耗密度和温度场分布,并依据IEEEC57.163标准,计算GIC作用下变压器内部构件的动态温升曲线。仿真计算结果与设计值的良好吻合说明了该文计算结果的正确性。同时发现,受GIC影响后,电力变压器的夹件、拉板、油箱等的涡流损耗分布极不均匀,且随GIC电流的增加而增大。GIC脉冲作用下的变压器金属构件局部温度会急剧上升,在100A直流脉冲下,变压器主柱拉板的局部温升达到允许限值。研究结果可为GIC作用下大型变压器的耐受性能分析提供重要参考依据。

摘要：针对马铃薯收获机挖掘装置设计效率低、设计知识难以高效获取和运用的问题,构建了马铃薯收获机挖掘装置智能设计系统。在收集整理挖掘铲设计规则的基础上,以产生式、框架式和混合式的知识表示方法表达挖掘装置的设计知识并进行存储,建立智能设计系统知识库;利用Visual Studio软件搭建知识管理系统,对规则类和实例类知识进行管理;采用基于规则和基于实例的正向推理方法,探讨智能设计系统推理机制;基于SolidWorks二次开发技术,对挖掘装置进行参数化建模;基于挖掘铲挖掘阻力分析和RecurDyn-EDEM联合仿真试验,构建挖掘装置工作性能评价体系;以Visual Studio为开发平台、***为开发语言,应用SolidWorks API接口技术和MySQL数据管理方法,对设计知识库、知识管理系统、推理机、参数化模型库和评价体系进行整合及联合运用,开发了马铃薯收获机挖掘装置智能设计系统。利用系统进行挖掘铲实例设计,并进行工作性能评价分析,结果表明,挖掘铲工作所需牵引力为856.24 N,所受最大牵引阻力为724.81 N,明薯率为97.22%,伤薯率为1.43%,表明该挖掘铲满足设计要求。

摘要：设计了一种能提供真实感的、基于物理意义的温度触觉复现设备.首先研究了人体与各种不同材质物体之间接触过程的传热过程,据此设计了一个可通过控制珀尔贴表面温度的变化来模拟这一过程的装置.该装置复现部分是由4个15 mm×15 mm的珀尔贴构成的4个独立热源,在温度控制部分增加了反馈和接触检测电路.系统能实现较高的升降温速率,通过对表面温度实时精确控制,可复现各种不同的温度变化曲线.在此基础上提出了一种创新的、基于温度补偿曲线的方法来模拟人手指触摸不同材质时的感觉.多热源复现装置小巧灵活,将来可方便地集成于机器人灵巧手上.最后,通过一系列的温度触觉复现实验,证明了本装置的有效性.

摘要：基于IEC 61850的电力变压器振动在线监测系统的设计与开发,是输变电设备在线监测系统的重要组成部分。文中在分析电力变压器振动在线监测系统数据采集与传输实际需求的基础上,依据IEC 61850第2版,基于系统功能分配,采用包括TVBR和SVBR在内的传感器、状态监测、电气设备逻辑节点,建立了电力变压器振动在线监测系统智能电子设备(IED)信息模型。将缓存报告控制块、文件传输模型作为实时通信协议,用于告警信息、测量信息和振动波形的传输,实现了电力变压器振动在线监测系统IED的实时通信。基于该设计的电力变压器振动在线监测系统已在现场得到了应用。