“Elites”Gathering,Looking Forward to the Future!The Grand Event about the Whole Industry Chain of Surfactant is Encouraging!

Perceive a new tendency,see a new future,take advantage of new technologies and lead a new wave!From Mar.23rd-25th,the“2023 China Surfactant Industry Conference”and“2023 China International Surfactant Industry Expo”were held fervently at Guangzhou Nanfeng Langham Hotel.This grand event was sponsored by China Research Institute of Daily Chemical Industry,undertaken by China Daily Chemical Industry Information Center and Surfactant&Detergent Industry Productivity Promotion Center.

World Class Elite Breaststrokers Downward Kick EMG Muscle Activity of the Gluteus Maximus, Quadriceps Femoris, Hamstring, Gastrocnemius Medialis, Rectus Abdominal, and Erector Spinae

This study analyzed the difference between using a downward breaststroke kick and a horizontal breaststroke kick in a sample of world class elite swimmers.We compared average muscle activity of the gluteus maximus,quadriceps femoris(vastus medialis and rectus femoris),hamstring/long head of the biceps femoris,gastrocnemius medialis,rectus abdominal,and erector spinae when using the downward breaststroke kick technique.We find that when this sample of swimmers utilized the downward breaststroke kick,max speed and velocity per stroke increased,measured by 12,788 EMG samples,where the results are highly correlated to duration of the aerodynamic buoyant force in breaststroke kick technique.The increases in performance observed from measuring the world class elite swimmers is highly correlated to the duration of the kick aerodynamic buoyant force.Among this sample of elite swimmers,the longer a swimmer demonstrates a buoyant force breaststroke kick,the lower the time in a 100 breaststroke.

安森美下一代1200 V EliteSiC M3S器件提高电动汽车和能源基础设施应用的能效

全新产品系列包括快速开关MOSFET和半桥功率集成模块,具备领先行业的每开关超低导通电阻Rds(on),采用行业标准封装智能电源和智能感知技术的领导者安森美(onsemi,美国纳斯达克上市代号:ON),推出最新一代1200 V Elite SiC碳化硅(SiC)M3S器件,助力电力电子工程师实现更出色的能效和更低系统成本。全新产品系列包括有助于提高开关速度的Elite SiC MOSFET和模块,以适配越来越多的800 V电动汽车(EV)车载充电器(OBC)和电动汽车直流快充、太阳能方案以及能源储存等能源基础设施应用。

为什么EliteSiC M3S技术是高速开关应用的更优选择?

碳化硅(SiC)具有比硅(Si)更高的介电击穿场强、能带隙和热导率,电力电子设计人员可以利用这些特性来开发比硅基IGBT器件效率更高、功率密度更大的电源转换器。针对这些应用,为了最大限度地减少高频下的导通和开关损耗,需要使用低RDS(on)和低Qrr(体二极管反向恢复电荷)的器件。

小烧的HiFi进阶之路平衡电源PLiXiR净源ELITE BAC 1500试用报告

HiFi成长之路的又一次体验,这次体验的高端“食材”,由诚意满满的《视听前线》组织,漂流品为PLiXiR净源Elite BAC 1500特别版电源处理器和Elite BAC 3000标准版电源处理器。小弟有幸试用的是Elite BAC 1500特别版,收到产品的一刻有些惊呆,对于电源的理解,我深感自己之前的浅薄。

系统脱胎换骨,我沉浸在曼妙的音乐世界中PLiXiR净源Elite BAC 3000电源处理器试用有感

近两年来,随着自己的音响系统趋于稳定、听音取向逐渐明确,我开始关注之前我认为对音质的影响相对“不那么明显”的周边产品,包括电源、线材、机柜和脚架等。其中电源类产品引起了我较大的兴趣。无论从哪种渠道获取的信息,都强调电源对于音响系统的重要性。

Modified Elite Opposition-Based Artificial Hummingbird Algorithm for Designing FOPID Controlled Cruise Control System

Efficient speed controllers for dynamic driving tasks in autonomous vehicles are crucial for ensuring safety and reliability.This study proposes a novel approach for designing a fractional order proportional-integral-derivative(FOPID)controller that utilizes a modified elite opposition-based artificial hummingbird algorithm(m-AHA)for optimal parameter tuning.Our approach outperforms existing optimization techniques on benchmark functions,and we demonstrate its effectiveness in controlling cruise control systems with increased flexibility and precision.Our study contributes to the advancement of autonomous vehicle technology by introducing a novel and efficient method for FOPID controller design that can enhance the driving experience while ensuring safety and reliability.We highlight the significance of our findings by demonstrating how our approach can improve the performance,safety,and reliability of autonomous vehicles.This study’s contributions are particularly relevant in the context of the growing demand for autonomous vehicles and the need for advanced control techniques to ensure their safe operation.Our research provides a promising avenue for further research and development in this area.

Stay-Green Panicle Branches Improve Processing Quality of Elite Rice Cultivars

Rice panicle branches are key routes for transportation of photo synthetic products to grains.Branch senescence is an important trait that the breeders considered when breeding elite rice cultivars in South China.However,little is known about the mechanisms underlying the contributions of stay-green panicle branches to rice yield and quality.Here,we reported stay-green branches that continuously maintained transportation function and provided carbohydrates for basal grain development at the late stages of rice development.This ensured the coordination of development between apical and basal grains,and further improved the processing quality of elite rice.These findings provided strategies for improving the fullness and quality of rice grains and presented an important basis for cultivating elite rice.

Creating Prep to Play PRO for women playing elite Australian football:A how-to guide for developing injury-prevention programs

Background:Developing context-specific,evidence-informed,and implementable injury-prevention programs is challenging.Women playing in the elite Australian Football League for Women are at high risk of serious knee injuries,and no specific injury-prevention program exists.The objective of the study was to describe the collaborative process used to create a context-specific injury-prevention program.Methods:A previously used intervention-development process was modified to incorporate a partnership with the sport’s governing organization and focus on engaging program implementers.The Reach Effectiveness Adoption Implementation and Maintenance(RE-AIM)Sports Setting Matrix guided program development and implementation strategies.Results:The 7-step process,aligned with the RE-AIM Sports Setting Matrix,was applied to develop the injury-prevention program and was titled Prep to Play PRO.The steps were:(Step 1)gaining organizational support and establishing a project partnership;(Step 2)using research evidence and clinical experience;(Step 3)consulting content and context experts;(Step 4)engaging the organization,experts,program implementers,and end-users to concreate the intervention and develop implementation strategies;(Step 5)testing the intervention acceptability and feasibility;(Step 6)evaluating the intervention and implementation strategies against theory;and(Step 7)obtaining feedback from early implementers and end-users.Conclusion:Engaging critical stakeholders at multiple ecological levels(organization,team,and athlete)throughout program development and implementation planning support real-world use.The processes and activities described can guide future sports injury-prevention program development and implementation.

U.S.’ Recognition, Evaluation of China-U.S. Educational Cooperation and Its Enlightenment to China--Analysis Based on the Survey Reports by U.S.’Policy Elites

Educational cooperation is one of the key factors to embody humanistic exchanges and promote the development of international relations.Through the analysis of four survey reports on China-U.S.educational cooperation,it is found that American policy elites generally attach importance to the distribution of power,the application of law,mutual benefit between the two countries in educational cooperation,and pay attention to the potential motivation and influence of China.China should rationally refer to the views and suggestions,strengthen the effectiveness of dialogue mechanism,enhance the credibility of international discourse,and at the same time encourage the negotiation and governance among cooperative universities,so as to promote the stable and sustainable development of education cooperation.

Assessing edge-coupled interdependent network disintegration via rank aggregation and elite enumeration

The disintegration of networks is a widely researched topic with significant applications in fields such as counterterrorism and infectious disease control. While the traditional approaches for achieving network disintegration involve identifying critical sets of nodes or edges, limited research has been carried out on edge-based disintegration strategies. We propose a novel algorithm, i.e., a rank aggregation elite enumeration algorithm based on edge-coupled networks(RAEEC),which aims to implement tiling for edge-coupled networks by finding important sets of edges in the network while balancing effectiveness and efficiency. Our algorithm is based on a two-layer edge-coupled network model with one-to-one links, and utilizes three advanced edge importance metrics to rank the edges separately. A comprehensive ranking of edges is obtained using a rank aggregation approach proposed in this study. The top few edges from the ranking set obtained by RAEEC are then used to generate an enumeration set, which is continuously iteratively updated to identify the set of elite attack edges.We conduct extensive experiments on synthetic networks to evaluate the performance of our proposed method, and the results indicate that RAEEC achieves a satisfactory balance between efficiency and effectiveness. Our approach represents a significant contribution to the field of network disintegration, particularly for edge-based strategies.

基于PV Elite软件的塔器校核计算注意事项分析

在对塔式容器进行设计计算时,不仅需要考虑的影响因素繁多,而且其校核计算也较为复杂。对于采用ASME标准规范进行建造的塔式容器,本文介绍了几个在使用PV Elite软件对其进行建模和校核计算时需着重注意和考虑的地方,如合理选择地脚螺栓的计算方法、对塔器进行合理分段建模计算以及考虑轴向应力对于开孔补强的影响等,以便提醒设计人员能够全面考虑计算的正确性和完整性,进而提高塔器操作的稳定性和安全性。

差异教育:撬动拔尖创新人才培养的“阿基米德点”

在新一轮科技革命与产业革命浪潮下,拔尖创新人才在全球竞争格局中发挥着愈加关键的作用,培养拔尖创新人才自然成为世界各国教育的主要任务。拔尖创新人才培养不仅事关国家重大战略方针的贯彻,还是新时代高质量教育体系建设的题中应有之义,更是实现人才全面自由发展的重要抓手。差异教育作为一种承认差异、尊重差异并发展差异的教育模式,分别为拔尖创新人才培养提供了理念、方法与评价上的支撑,是撬动拔尖创新人才培养的“阿基米德点”。具体而言,以“差异育人”为中心的差异教育理念承认并尊重个体具备的不同优势、天赋与潜质,让教育者明白每个学生都可以在自己的创新领域成为“拔尖”人才;以“因材施教”为核心的差异教育方法,打破传统教学“设定标准”和“定向加工”的方法原则,契合了拔尖创新人才的培养模式,让每个学生都能长善救失,获得最佳发展;以“人尽其才”为主的差异教育评价标准,通过“多把尺子”为更多拔尖创新人才提供发展机会,促使拔尖创新人才源源不断地“冒出来”。为此,在拔尖创新人才培养的实践过程中,教育者有必要有机融入差异教育的理念主张,通过树立“尊重差异”的培养理念、创设“发展差异”的培养模式以及探索“多元包容”的评价体系,为拔尖创新人才培养提供差异教育支持。

中国高水平运动员心电图异常分析

目的:通过对中国高水平运动员进行心电图检查并诊断,评估性别、运动年限和运动类型对运动员心电图改变的影响。方法:对2016年至2019年进行心电图检查的891名中国高水平运动员的心电图进行检测。根据2010年欧洲心脏病学会指南(ESC)将心电图分为:组0(正常心电图)、组1(常见与训练相关心电图)、组2(不常见与训练不相关心电图)。分析运动员的性别、训练年限(4~6年、7~10年和≥11年)和运动类型(技巧类、力量类、耐力类、混合类)对各组心电图改变的影响。结果:(1)不常见与训练不相关的心电图改变的发生率在不同性别、不同训练年限和不同训练类型的运动员间均不存在显著性差异。(2)常见与训练相关的心电图改变在男运动员中发生率显著高于女运动员(58.9%vs 47.4%);在训练超过11年运动员中发生率最高,与训练4~6年相比具有显著性差异(P<0.05);在不同运动类型间具有显著差异(P<0.01),在混合类中发生率最高,为64.6%;窦性心动过缓在混合类和耐力类运动中的发生率显著高于其他运动类型(P<0.05)。结论:中国高水平运动员与训练相关的心电图改变与性别、训练年限和运动类型均有关。

陆地棉主要株型性状关联分析及优异等位基因挖掘

【目的】株型是影响棉花机械化和产量的关键因素,开展陆地棉主要株型性状的关联分析研究,可为棉花株型分子育种提供标记及材料来源。【方法】以403份陆地棉种质资源为材料,利用覆盖全基因组的201对多态性SSR标记,对6个环境4个株型性状进行了关联分析,挖掘株型性状优异等位基因。【结果】6个环境中株高、果枝始节高、果枝始节位和果枝数的平均变异系数分别为13.70%、21.51%、14.18%和11.51%,广义遗传率为46.24%-74.15%;201对标记共产生394个多态性等位变异位点;能同时在最佳线性无偏预测值(best linear unbiased prediction, BLUP)(P<0.01)和2个以上环境中检测到显著(P<0.05)关联的位点共38个,包括与株高关联的位点16个、与果枝始节高关联的位点6个、与果枝始节位关联的位点11个、与果枝数关联的位点5个,5个位点同时与多个性状关联;鉴定到含有目标性状优异等位基因的材料31份,其中6份材料同时携带多个优异等位基因。【结论】在403份陆地棉自然群体中,鉴定到38个与4个株型性状关联的标记位点,发掘出31份含有优异等位基因的典型材料。

纵横协同:新乡贤文化建设的双重路径

新乡贤文化是由传统乡贤文化创造性转化、创新性发展而来的新型文化形态,以其独特作用助推乡村全面振兴。政府和社会是新乡贤文化建设的两种力量,并以此形成了政府主导式建设路径和社会主动式建设路径。政府主导式建设路径以做好顶层设计、整合各种资源、注重授权赋能为主要抓手,通过行政纵向推动力量引领新乡贤文化建设;社会主动式建设路径则以乡村内生力量、特色化的优势资源和参与式行动为依托,通过内生横向协商方式践行新乡贤文化建设。双重建设路径虽共存于乡村场域,但二者属性不同,需通过纵横协同形成新乡贤文化建设的强大合力,使新乡贤文化建设更具持续性和实效性。习近平文化思想为双重路径的纵横协同提供了强大思想武器和科学行动指南,双重建设路径应顺应时代新要求,遵循互嵌互融逻辑,在互动-嵌入-融合中实现纵横协同,共同服务于新乡贤文化建设。

面向大规模优化问题的精英贡献两阶段动态分组算法

协同进化框架是解决大规模全局优化问题的有效方法,设计合理的决策变量分组方法是提高协同进化算法性能的关键,而利用精英决策变量动态构建精英子组件可以有效提高进化效率,但在进行大规模优化时,其可能将无关的变量分配到同一子组件,从而无法充分利用分组提高协同进化效率。针对该问题,提出一种精英贡献两阶段动态分组算法(EC-TSDG)。在分组前阶段,对变量进行随机分组,评估变量的贡献程度,从众多变量中寻找精英贡献变量;在分组后阶段,利用变量的相关关系寻找与精英决策变量存在相互作用的剩余变量,并将其合并形成精英子组件,使得精英子组件内部的变量两两相关,以此提高变量分组的准确性以及算法的收敛速度,避免子组件之间的相关干扰。最后,采用具有外部存档的自适应差分进化算法作为优化器进化各个子组件。在CEC'2013测试集上与其他先进算法进行比较,实验结果表明,EC-TSDG收敛速度快于对比算法,Friedman检验值为1.43,平均排序较对比的动态分组算法DCC平均提升36.78%。

基于EGA优化的农用UTV半主动悬架最优控制

针对UTV在恶劣路面行驶引起的车辆振动,以某款农用UTV悬架系统为对象,建立包含俯仰的四自由度(4-DOF)半车半主动悬架动力学模型,并提出一种EGA-LQR复合控制策略,设计满足物理约束的悬架系统自适应最优控制器。利用EGA算法的全局寻优与快速收敛特性,对LQR最优控制器的权重矩阵寻优,输出悬架系统最优控制阻尼力。在Matlab/Simulink中搭建UTV的路面与悬架模型进行时域仿真,仿真分析结果表明,EGA-LQR控制显著减小了车体质心垂向振动加速度、车体俯仰角加速度、前后轮动位移以及前后悬架动行程的均方根值,有效保证了UTV在农田路面下行驶的舒适性与安全性。

场域理论视角下返乡精英帮扶乡村产业振兴的实践逻辑 ——以北京市延庆区K村为例

产业振兴是乡村振兴的重中之重,也是解决“三农”问题的前提。返乡精英能够有效对接外部市场并承接政府资源,在乡村产业振兴实践中处于特殊的地位。基于布尔迪厄的场域理论,从场域、资本和惯习的视角切入,以北京市延庆区K村为例,阐释返乡精英在乡村产业振兴过程中所发挥的精英帮扶作用,并剖析其形成机制、实践逻辑与影响模式。研究发现,在乡村振兴场域中,返乡精英利用政治势能、资本支持,通过对乡村内生惯习的激活,加强了基层治理水平,发挥了政群纽带、合作桥梁的作用,最终实现了对当地乡村产业振兴的推动。因此,实现乡村产业振兴,应重视返乡精英的正向影响,积极引导返乡精英将资源优势转化为治理效能,构建起返乡精英帮扶乡村产业的良性机制。