超声波在污水处理中的应用

本文介绍了超声波降解的原理、特点和影响因素以及目前取得的研究成果和主要结论，并对超声降解技术存在的问题和今后的发展趋势进行了讨论．     

关于深化高校后勤信息化建设的思考

影响高校后勤信息化建设的因素包括观念、人力资源和技术设备等方面的因素,为了进一步加强高校后勤信息化建设,需要树立先进的管理理念和建立完善的管理制度,并加强人力资源建设。另外,要对信息管理系统平台的开发和使用加强管理     

Clinical detection and movement recognition of neuro signals

INTRODUCTION Human limbs are complex, delicate systems.Their reconstruction, both for appearance and forfunction compensations, proves to be complicatedprojects. With the development of science and tech-nology, both researchers and disabilities hope to haveartificial limb much more perky, comfortable, dex-terous and effective. Although thousands of pros-thetic limbs are commercially available worldwide,most of them, from mechanical styles to electricstyles, from motion controlled t…     

转型社会小城镇社区权力结构变迁研究－－以团风镇社区为个案

支河北团风县团风镇社区为个案,分析小城镇社区权力结构由单向依赖向多元化变迁的趋势、推动力及利与弊,并对其未来发展作了预测。     

《大学语文》自学方略初探

笔试将《大学语》教材的内容划分为语知识、释词和翻译、思想内容和艺术特点、议论写作四大部分，分别探索一些行之有效的学习方略，以供学员参考并就教于方案。     

高素质新型政工人才培养的举措

高素质新型政工人才的培养是个系统工程，它包括树立新的教育观念，构建多样化的人才培养模式，提高教员队伍的整体素质，建立和完善合力育人机制，营造良好的育人环境。     

新课标下的数学课堂教学

数学课堂教学不仅是传授知识、形成技能、发展智力的过程,而更是教师引导学生经历数学化的过程,是促进学生全面、主动发展的过程,是承认学生差异、张扬学生个性的过程,是学生之间自主交流、合作探索的过程,是落实德育教育的过程,是理论知识和生活问题密切联系的过程,是数学课程资源的开发、利用、拓展的过程,是数学教师专业化发展的过程.     

月亮意象原始及嬗变

我们对月亮神话的分析中看到原始的信息是先民们对生殖的崇拜，赋予月亮阴性特征；随后月亮本身具有的视觉审美特征和女性的月水守信共同衍生了月亮比德入诗，具有爱情忠贞、君子守信的意义；唐以来月亮表达了一种人情结——富有悲剧意识之思，从而月亮学意象内涵便凝固了下来。这三次转变都未脱离月亮的视觉特征，但它们本身又是承传发展的。     

Tandem Biocatalysis by CotA-TJ102@UIO-66-NH2 and Novozym 435 for Highly Selective Transformation of HMF into FDCA

2,5-Furandicarboxylic acid(FDCA) is a potential biorenewable chemical for applications including plastics, polyamides, drugs, etc. The selective biosynthesis of FDCA from 5-hydroxymethylfurfural(HMF) by a specific enzyme poses a great challenge. In this study, we reported an efficient strategy to produce FDCA from HMF by the tandem biocatalysis of laccase(Cot A-TJ102@UIO-66-NH_2) and Novozym 435. For the first step, a nanoparticle metal–organic framework was synthesized as a carrier to immobilize Cot A-TJ102@UIO-66-NH_2, which was assigned for the production of 5-formyl-2-furancarboxylic acid(FFCA) and featured an enzyme loading of 255.54 mg/g, specific activity of 135.90 U/mg, and solid loading ratio of 99.65%. Under optimal conditions, an ideal FFCA yield of 98.5% was achieved, and the Cot A-TJ102@UIO-66-NH_2 presented a high recycling capacity after 10 cycles. For the second step, Novozym 435 was applied for the further conversion of FFCA into FDCA, presenting a high FDCA yield of 95.5% under the optimized conditions. Novozym 435 also exhibited a high recyclability after eight cycles. As a result, the tandem biocatalysis strategy provided a 94.2% FDCA yield from HMF, indicating its excellence as a method for FDCA production.     

Multi-objective aerodynamic optimization design of high-speed train head shape

To improve the aerodynamic performance of high-speed trains (HSTs) running in the open air, a multi-objective aerodynamic optimization design method for the head shape of a HST is proposed in this paper. A parametric model of the HST was established and seven design variables of the head shape were extracted. Sample points and their exact values of optimization objectives were obtained by an optimal Latin hypercube sampling (opt. LHS) plan and computational fluid dynamic (CFD) simulations, respectively. A Kriging surrogate model was constructed based on the sample points and their optimization objectives. Taking the total aerodynamic drag force and the aerodynamic lift force of the tail coach as the optimization objectives, the multi-objective aerodynamic optimization design was performed based on a non-dominated sorting genetic algorithm-II (NSGA-II) and the Kriging model. After optimization, a series of Pareto-optimal head shapes were obtained. An optimal head shape was selected from the Pareto-optimal head shapes, and the aerodynamic performance of the HST with the optimal head shape was compared with that of the original train in conditions with and without crosswinds. Compared with the original train, the total aerodynamic drag force is reduced by 2.61% and the lift force of the tail coach is reduced by 9.90% in conditions without crosswind. Moreover, the optimal train benefits from lower fluctuations in aerodynamic loads in crosswind conditions.