摘要：我刊2018年第10期刊登了一篇上海交通大学医学院陈红教授团队的研究《缓步行走3km对血压心率的影响及其辅助降压的β-内啡肽机制》,发现缓步行走3km可降低正常血压者及高血压患者的血压。后来作者又发现阳光下与非阳光条件下的步行存在差别,因此进一步设计了对比阳光下与非阳光步行降压效果与机制的研究。根据初步研究结果,作者于2019年在《中国药理学报(英文版)》"Correspondence(通信)"栏目中刊登了"Sunny walking counts more"一文,经作者推荐和《中国药理学报(英文版)》编辑部同意,我刊将其翻译为中文版本,以飨读者。

摘要：对于高尔夫球场来说,其经营和发展的根本除了球场本身的硬件以外,以服务为主的软件也至关重要。在北京天安假日高尔夫球场的Daniel看来,服务是球场经营发展的根基。在北京近40多家大大小小的高尔夫球场中,北京天安假日也算是后起之秀,经营近一年的时间里,已拥有相当数目的会员,无论是从球场难度设计、草坪日常维护还是会员服务,在北京高尔夫圈和高尔夫球友中评价颇高,从澳大利亚回国任职不到一个月的Daniel,根据国内外差异和国内南北地区差异全面地分析了天安假日的经营管理。他认为,天安假日吸引众多球友的胜出点,除了地理位置的优势和近18万株不同植物的生态优势外,更多的是球场本身为会员和球友提供的服务,而要不断提升,需要建立一个完善和相互协作的经营团队。

摘要：Mesoporous nanocrystal clusters of anatase TiO2 with large surface area and enhanced photocatalytic activity have been successfully synthesized. The synthesis involves the self-assembly of hydrophobic TiO2 nanocrystals into submicron clusters, coating of these clusters with a silica layer, thermal treatment to remove organic ligands and improve the crystallinity of the clusters, and finally removing silica to expose the mesoporous catalysts. With the help of the silica coating, the clusters not only maintain their small grain size but also keep their mesoporous structure after calcination at high temperatures （with BET surface area as high as 277 m2/g）. The etching of SiO2 also results in the clusters having high dispersity in water. We have been able to identify the optimal calcination temperature to produce TiO2 nanocrystal clusters that possess both high crystallinity and large surface area, and therefore show excellent catalytic efficiency in the decomposition of organic molecules under illumination by UV light. Convenient doping with nitrogen converts these nanocrystal clusters into active photocatalysts in both visible light and natural sunlight. The strategy of forming well-defined mesoporous clusters using nanocrystals promises a versatile and useful method for designing photocatalysts with enhanced activity and stability.

摘要：依据国网电力科学研究院公布的《光伏电站接入电网技术规定》,提出光伏并网系统基于前馈控制的低电压穿越优化控制策略。前馈控制策略通过将电网电压以及负载电流的变化引入电流环,能有效加快电流环对扰动的反应速率,抵消电网的影响。以所研制的100kW光伏并网逆变器为研究对象,给出了仿真结果和实验验证。试验结果表明,所采用的控制策略有良好的动态性能,能抑制电网电压跌落时的逆变器过流,保障系统正常运行。

摘要：随着我国电气化铁路的持续建设和高速列车的迅猛发展,高速列车上供电和用电的电气设备越来越多,使得高速列车供电系统的电磁干扰机理分析和电磁兼容设计也更加复杂。文中从构成电磁干扰的3个要素,即干扰源、敏感设备、耦合路径3个方面,阐述高速列车供电系统中电磁干扰的特性与形成机理。综述现有高速列车供电系统的电磁干扰建模方法和工具及其优缺点;归纳高速列车供电系统中电磁干扰敏感设备及其典型的耦合路径;梳理高速列车供电系统现有电磁干扰建模方法和各自的适用范围与相互关系;介绍高速列车供电系统传统的和先进的电磁干扰预测方法和电磁干扰抑制方法。在此基础上,分析目前高速列车供电系统电磁兼容的设计难点和挑战,并提出未来发展方向。该文为系统了解高速列车供电系统中的电磁干扰问题和电磁兼容设计要点提供较为完整的参考。

摘要：采用一种新的数据采集处理方法对风光互补控制器进行有效的实时监测。利用VB6.0编写程序界面,通过MSComm控件读取数据,并将数据保存到数据库中,合理处理后可得到控制器的性能、工作状态以及能耗状态,利用插值算法处理数据使得参数曲线平滑过渡。实验结果表明:该监测系统界面友善,使用方便,对控制器性能的优化起到至关重要的作用。

摘要：In order to solve the serious problems of seeds are covered by residual film and overhead by straw during no-till seeding,a seed furrow cleaning device for no-till maize seeding was developed,which adopted a collaborative cleaning method of rotating spring teeth and curved sliding *** movement process and motion trajectory of throwing residual film and straw were *** maximum distance of throwing to one side in horizontal and maximum height in vertical were *** motion trajectory of adjacent spring teeth was analyzed by Matlab,the motion trajectories of adjacent spring teeth at different speeds of 120 r/min,150 r/min and 180 r/min were achieved,the theoretical analysis results showed that the area of omitted area decreased with the increase of rotation *** on theoretical and simulation analysis of critical parameters,the forward speed of machine,rotation speed of spring teeth,and dip angle between spring teeth and rotary disc were selected as the influencing *** cleaning rate(SCR)and residual film cleaning rate(RFCR)were selected as the response values for three factors and three levels of orthogonal experiment *** optimal combination of the selected parameters was obtained,and the field test verification was also *** results showed that the rotation speed of spring teeth,forward speed and dip angle of spring teeth significantly affect SCR and RFCR were in decreasing *** field test results indicated that when forward speed was 6 km/h,rotation speed of spring teeth was 180 r/min and dip angle of spring teeth was 40°,SCR and RFCR were 88.27%and 84.31%,*** study provides a reference for the development of no-till seeder in Xinjiang and the northwestern regions of China.

摘要：目的:优选蛇含石最佳炮制工艺。方法:采用正交设计法和多指标综合评价法,以宏观性状、中观全铁含量、微观溶出量(水溶性铁、重金属铅和镉)为评价指标,考察药材粒径、煅制时间、煅制温度及煅淬次数,优选蛇含石炮制工艺。结果:最佳炮制工艺为药材粒径(1.2±0.2)cm时700℃煅制40 min,煅淬3次。结论:蛇含石煅制工艺合理可行。

摘要：目的:构建sh Hipk2慢病毒表达载体,并探讨同源结构域相互作用蛋白激酶2(homeodomain-interacting protein 2,HIPK2)在七氟醚诱导的原代海马神经元凋亡中的作用。方法:设计并构建针对HIPK2靶基因的慢病毒,转染至原代海马神经元,通过免疫荧光检测转染效率,应用RT-PCR验证干扰效果。病毒转染3 d后,处理组经过4.1%的七氟醚暴露6 h后,进行相应的检测。采用CCK8比色法检测各组细胞活性,LDH检测细胞毒性,FITC/PI流式细胞仪及Western Blot检测细胞凋亡。结果:RT-PCR显示较Scr组与Con组相比,sh HIPK2组HIPK2 m RNA水平明显下降(P0.05)。流式凋亡细胞检测结果显示Scr+Sev组凋亡细胞数明显高于Scr组(P0.05)。Western Blot结果显示Scr+Sev组Cl-caspase 3蛋白水平较Scr组相比明显升高,sh HIPK2+Sev组与sh HIPK2组相比无统计学差异(P>0.05)。结论:HIPK2可促进七氟醚引起的原代海马神经元的凋亡。