摘要：通用、福特、丰田、铃木、宝马、克莱斯勒、劳斯莱斯和大众，它们的共同之处是什么呢？除了同为汽车公司之外，它们在海外都有外包的设计、产品工程和高科技诊断系统。

摘要：力学超材料是一种有别于传统力学行为的工程材料,它源于人工可编程的微结构以及材料的固有属性.在过去的十年中,随着计算性能和复杂微观结构制造能力的巨大进步,力学超材料已经吸引了研究人员的广泛关注,因为它能够实现自然界中不可能出现的多重物理属性.该领域迅速崛起的趋势之一是将材料行为和单元结构与其他不同的多种物理因素(如电场或磁场)以及温度、光或化学反应等刺激相结合,从而扩大按需主动调制力学响应的范围.在本文中,我们旨在概述有关超材料的力学和多物理性质调制的相关文献,重点介绍双能级设计的新兴趋势,着重讨论力学超材料在关键工程领域应用中的巨大潜力.本文对该领域的发展趋势、挑战和未来路线进行了系统深入分析,涵盖实时可重构性和功能编程、4D打印、纳米超材料、人工智能和机器学习、多物理折纸/剪纸、活性物质、软物质和保形超材料、复杂微结构制造、服役寿命效应和可扩展性等概念.

摘要：Modern wireless communications gadgets demand multi-standard communications facilities with least overlap between different input radio channels. A sharp digital filter of extremely narrow transition-width with lower stop band ripples offers alias-free switching among the preferred frequency bands. A computationally competent low pass filter (LPF) structure based on the multistage frequency response masking (FRM) approach is proposed for the design of sharp finite impulse response (FIR) filters which are suitable for wireless communications applications. In comparison of basic FRM with other existing multistage FRM structures, the proposed structure has a narrow transition bandwidth and higher stop band attenuation with significant reduction in terms of the number of computational steps. A design example is incorporated to demonstrate the efficiency of the proposed approach. Simulation results establish the improvement of the proposed scheme over other recently published design strategies.

摘要：Phenylboronic acids can exist, in principle, in three different conformers （syn, syn; syn, anti and anti, anti） with distinct energy profiles. In their native state, these compounds prefer the energetically favored syn, anti-conformation. In molecular complexes, however, the functionality exhibits conformational diversity. In this paper we report a series of co-crystals, with N-donor compounds, prepared by a design strategy involving the synthons based on the syn, syn-conformation of the boronic acid functionality. For this purpose, we employed compounds with the 1,2-diazo fragment （alprazolam, 1H-tetrazole, acetazolamide and benzotriazole）, 1,10-phenanthroline and 2,2＇-bipyridine for the co-crystallization experiments. However, our study shows that the mere presence of the 1,2-diazo fragment in the coformer does not guarantee the successful formation of co-crystals with a syn, syn-conformation of the boronic acid.

摘要：The self-assembly of the precatalyst modules, which are amino acids and cinchona alkaloid derivatives, leads to the direct formation of the desired organocatalysts without any synthesis. These modularly designed organocatalysts （MDOs） may be used for catalyzed asymmetric aldol reaction the corresponding aldol products may be obtained in mediocre diastereoselectivities （up to 79 ： 21 dr）. Depending on structure of the aldehyde substrates, to excellent ee values （up to 92% ee） with moderate

摘要：为研究机制簇绒腈纶地毯的质量特性,采用加权主成分分析(WPCA)与稳健设计理念相结合的方法,优化利用M-tuft高科技设备生产的簇绒腈纶地毯的质量和生产率。结果表明,压缩标准越低,压缩回弹率和毛束联结牢度的标准越高,生产的地毯质量也越好。为提高质量和生产力,评估了机制簇绒腈纶地毯生产的最佳工艺环境,并进行了参数设置优化。

摘要：A series of 2-（arylmethylidene）-2,3-dihydro-1-benzofuran-3-one derivatives（aurones, 1–20） were synthesized and screened for their inhibitory activity against h MAO. Seventeen compounds（1–5, 7–17,19） were found to be selective towards h MAO-B, while two were non-selective（6 and 20） and one（18）selective towards h MAO-A. Compound 17（Ki = 0.10 0.01 mmol/L） was found to be equally potent and selective towards h MAO-B, when compared with the standard drug Selegiline（Ki = 0.12 0.01 mmol/L）.Nature and position of substitution in aryl ring at 2nd position of benzofuranone influences h MAO-B inhibitory potency, while their structural bulkiness influences selectivity between h MAO-A and h *** docking simulation was also carried out to understand the interaction of inhibitor with the enzyme at molecular level, and we found the docking results were in good agreement with the experimental values. Comparison of the activity profile of the aurones with their corresponding flavones reported earlier by our group revealed that there exists no difference in potency as well as selectivity.

摘要：Everyone knows that thousand of words are represented by a single image. As a result, image search has become a very popular mechanism for the Web-searchers. Image search means, the search results are produced by the search engine should be a set of images along with their Web-page Unified Resource Locator (URL). Now Web-searcher can perform two types of image search, they are “Text to Image” and “Image to Image” search. In “Text to Image” search, search query should be a text. Based on the input text data, system will generate a set of images along with their Web-page URL as an output. On the other hand, in “Image to Image” search, search query should be an image and based on this image, system will generate a set of images along with their Web-page URL as an output. According to the current scenarios, “Text to Image” search mechanism always not returns perfect result. It matches the text data and then displays the corresponding images as an output, which is not always perfect. To resolve this problem, Web researchers have introduced the “Image to Image” search mechanism. In this paper, we have also proposed an alternate approach of “Image to Image” search mechanism using Histogram.

摘要：研苯硼酸衍生物有3种不同构象(syn,syn-;syn,anti-和anti,anti-构象),这3种构象能量非常不同.苯硼酸衍生物通常是采用能量最低的syn,anti-构象存在.然而在配合物中,苯硼酸衍生物展现了硼酸功能团的构象多样性.在本文中,我们采用syn,syn-构象的硼酸衍生物作为结构单元,与含氮给体化合物反应,合成了一系列共晶配合物.采用的含氮给体化合物包括含1,2-重氮片段的化合物(阿普唑仑,1H-四唑,乙酰唑胺和苯并三唑)、邻菲罗啉和2,2′-联吡啶.结果表明,只有1,2-重氮片段不一定能与syn,syn-构象的硼酸及衍生物生成共晶.

摘要：简介汽车设计从过去单纯的机械式系统,到如今常常包含多达100个微处理器的现代汽车,已经走过了很长的历程。传统汽车上用到电子器件的部分仅仅是那些娱乐设施,最常见的是汽车收音机。直到有关诸如废气排放量和节油性等汽车各方面性能的政府规定出台以后,