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Chinese Journal of Chemical Engineering 2022年第5期35卷 90-102页

作者： Zijun Li Shubo wang Sai Yao xueke wang Weiwei Li Tong Zhu Xiaofeng Xie School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China Beijing Institute of Space Launch Technology Beijing 100076China

The performance and operation stability of proton exchange membrane fuel cells(PEMFCs)are closely related to the transportation of reactants and water management in the membrane electrode assembly(MEA)and flow *** this paper,a new three-dimensional wave parallel flow field(WPFF)in cathode was designed and analyzed throughout simulation studies and an experimental *** experimental results show that the performance of PEMFC with WPFF outperforms that of PEMFC with straight parallel flow field(SPFF).Specifically,the peak power density increased by 13.45%for the PEMFC with WPFF as opposed to PEMFC with *** addition,the flow field with area of 11.56 cm^(2) was formed by the assembly of transparent end plate used for cathode and the traditional graphite plate used for *** understand the mechanism of the novel flow field improving the performance of PEMFC,a model of PEMFC was proposed based on the geometry,operating conditions and MEA *** thickness of gas diffusion layers(GDL),catalytic layers(CL)and proton exchange membrane were measured by scanning electron *** simulation result shows that compared with SPFF,the WPFF based PEMFC promote the oxygen transfer from flow channel to the surface of CL through GDL,and it was beneficial to remove the liquid water in the flow channel and the MEA.

关键词： Fuel cells Transport process Computational fluid dynamics Flow regimes Water management

Multistage Microstructured Ionic Skin for Real-Time Vital Signs Monitoring and Human-Machine Interaction

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Energy & Environmental Materials 2024年第6期7卷 218-229页

作者： xueke wang Jinyu Zi Yi Chen Qiang Wu Zhimin Xiang Yongqiang Tu Peng Yang Yanfen Wan National Center for International Research on Photoelectric and Energy Materials Yunnan Key Laboratory for Micro/Nano Materials&TechnologyYunnan Key Laboratory of Electromagnetic Materials and DevicesSchool of Materials and EnergyYunnan UniversityKunming 650091China

Skin-like electronics research aiming to mimic even surpass human-like specific tactile cognition by operating perception-to-cognition-to-feedback of stimulus to build intelligent cognition systems for certain imperceptible or inappreciable signals was so ***,we constructed an all-in-one tri-modal pressure sensing wearable device to address the issue of power supply by integrating multistage microstructured ionic skin(MM i-skin)and thermoelectric self-power staffs,which exhibits high sensitivity *** MM i-skin with multi-stage“interlocked”configurations achieved precise recognition of subtle signals,where the sensitivity reached up to 3.95 kPa^(−1),as well as response time of 46 ms,cyclic stability(over 1500 cycles),a wide detection range of 0–200 ***,we developed the thermoelectricity nanogenerator,piezoelectricity nanogenerator,and piezocapacitive sensing as an integrated tri-modal pressure sensing,denoted as P-iskin,T-iskin,and C-iskin,*** multifunctional ionic skin enables real-time monitoring of weak body signals,rehab guidance,and robotic motion recognition,demonstrating potential for Internet of things(IoT)applications involving the artificial intelligence-motivated sapiential healthcare Internet(SHI)and widely distributed human-machine interaction(HMI).

关键词： bio-template method integrated device ionic skin skin-like microstructure tri-modal pressure sensing

Bimodal Coupling Haptic Perceptron for Accurate Contactless Gesture Perception and Material Identification

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Advanced Fiber Materials 2024年第6期6卷 1874-1886页

作者： Guomin Ye Qiang Wu Yi Chen xueke wang Zhimin Xiang Jingyan Duan Yanfen Wan Peng Yang National Centre for International Research on Photoelectric and Energy Materials Yunnan Key Laboratory for Micro/Nano Materials and TechnologyYunnan Key Laboratory of Electromagnetic Materials and DevicesSchool of Materials and EnergyYunnan UniversityKunming 650091People’s Republic of China

A bimodal coupled multifunctional tactile perceptron for contactless gesture recognition and material identification is pro-posed to address the challenges posed by limited functionality,signal interference from multimodal collaborative work,and the high power consumption of traditional tactile *** perceptron integrates a capacitive sensor and a triboelectric sensor symmetrically,employing an energy complementarity strategy to reduce power consumption and implementing symmetrical distribution of two sensors for physical isolation to prevent signal *** capacitive sensor detects external pressure,providing information on material properties such as hardness,softness,and deformation,with a wide linear response range of 0-745.3 *** triboelectric sensor captures the electron affinity of measured ***,by utilising machine learning algorithms,a system for contactless gesture recognition and material identification is *** system demonstrates a remarkable accuracy rate of 98.5%when recognising 5 gestures,and achieves a perfect identi-fication(100%)of 10 different materials aided by incorporating capacitive and triboelectric *** results greatly advance the progress of tactile perceptrons with high integration,low power consumption,and multifunctionality,enhancing their effectiveness and reliability in smart device applications.

关键词： Haptic perceptron Capacitive and triboelectric mechanism Contactless gesture perception Material recognition

Does varicocele grade predict the postoperative changes of semen parameters following left inguinal micro-varicocelectomy?

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Asian Journal of Urology 2015年第3期2卷 163-166页

作者： Hongzhen wang xueke wang Dingjun Fu Hua Zhu Ming-kuen Lai Division of Urology Department of SurgeryChang Gung HospitalXiamenFujianChina

Objective:To evaluate the relationship between preoperative grade and postoperative changes of semen parameters following left inguinal ***:This study included 44 patients undergoing left microsurgical inguinal *** spermatic veins were classified as large(4 mm or more in diameter),medium(2-4 mm),or small(2 mm or less).Changes in sperm activity,morphology and count were estimated *** introperative findings and semen parameters were compared between varicocele groups of grades 2 and ***:Both sperm motility and count improved significantly postoperatively(from(31.9±16.3)%to(47.3±15.5)%,from(28.1±28.1)106/mL to(52.1±74.2)×10^6/mL).In varicoceles with grade 2 and 3,significant differences were found in the number of large veins(0.4±0.6 vs.1.2±0.7,p<0.001)and ultrasonographic maximum diameters of spermatic vein in supine and standing positions(2.3±0.4 cm vs.2.8±0.6 cm,3.1±0.7 cm vs.3.9±0.7 cm,p=0.001 and 0.001 respectively).However no difference of changes in sperm motility and count was detected((16.3±13.5)%vs.(14.4±12.6)%,(30.5±84.4)×10^6/mL vs.(12.9±20.6)×10^6/mL respectively,p=0.65 and 0.40 respectively).Conclusion:Preoperative varicocele grade might not predict postoperative semen changes regardless of possible existence of anatomic and ultrasonographic associations.

关键词： Varicocele Grade Microsurgery Infertility Inguinal

Large-scale gas accumulation mechanisms and reservoir-forming geological effects in sandstones of Central and Western China

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Petroleum Exploration and Development 2020年第4期47卷 714-725页

作者： LI Wei wang xueke ZHANG Benjian CHEN Zhuxin PEI Senqi YU Zhichao PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China China Northwest Sichuan Gas Mine of Southwest Oil and Gas Field Company PetroChinaSichuan 621700China

Large-scale gas accumulation areas in large oil-gas basins in central and Western China have multiple special accumulation mechanisms and different accumulation *** on the geological theory and method of natural gas reservoir formation,this study examined the regional geological and structural background,formation burial evolution,basic characteristics of gas reservoirs,and fluid geology and geochemistry of typical petroliferous *** results show that the geological processes such as structural pumping,mudstone water absorption,water-soluble gas degasification and fluid sequestration caused by uplift and denudation since Himalayan stage all can form large-scale gas accumulation and different geological effects of gas *** example,the large-scale structural pumping effect and fluid sequestration effect are conducive to the occurrence of regional ultra-high pressure fluid and the formation of large-scale ultra-high pressure gas field;mudstone water absorption effect in the formation with low thickness ratio of sandstone to formation is conducive to the development of regional low-pressure and water free gas reservoir;the water-soluble gas degasification effect in large-scale thick sandstone can not only form large-scale natural gas accumulation;moreover,the degasification of water-soluble gas produced by the lateral migration of formation water will produce regional and regular isotopic fractionation effect of natural gas,that is,the farther the migration distance of water-soluble gas is,the heavier the carbon isotopic composition of methane formed by the accumulation.

关键词： Central and Western China basins large-scale natural gas accumulation mechanism structural pumping effect mudstone water absorption effect water-soluble gas degasification effect fluid sequestration effect natural gas reservoir formation

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基于低场核磁共振的热风干燥过程花生仁含水率预测模型

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农业工程学报 2019年第12期35卷 290-296页

作者：渠琛玲汪紫薇王雪珂王殿轩河南工业大学粮油食品学院

为研究热风干燥过程中花生仁内部水分的变化规律,该文采用热空气对开农71、开农8834-9、天府3号3个品种的湿花生进行干燥,监测干燥过程中花生果、花生仁与花生壳含水率的变化;并利用低场核磁共振技术(LF-NMR)研究干燥过程中花生仁内部... 详细信息

为研究热风干燥过程中花生仁内部水分的变化规律,该文采用热空气对开农71、开农8834-9、天府3号3个品种的湿花生进行干燥,监测干燥过程中花生果、花生仁与花生壳含水率的变化;并利用低场核磁共振技术(LF-NMR)研究干燥过程中花生仁内部自由水、弱结合水和结合水的变化情况;建立花生仁水分弛豫峰占比与其含水率之间的数学关系,提出了一种花生含水率的快速检测方法。结果表明,由于花生仁和花生壳化学组成不同,仁和壳干燥曲线呈现不同的变化趋势。LF-NMR弛豫图谱显示干燥过程中,自由水弛豫峰逐渐消失,结合水和弱结合水弛豫峰面积无明显变化规律,油脂峰峰面积基本不变,说明花生仁在干燥过程中油脂的含量无明显变化。建立的花生仁国标法实测含水率y与核磁共振弛豫谱图得到的总水分峰占比(T21+T22+T23)的拟合方程R2为0.888 4。经验证,该方程能较好地对未知含水率的花生仁样品进行预测。因此,低场核磁共振技术可以用于花生仁含水率的快速检测。

关键词：含水率干燥核磁共振花生热风弛豫峰

“冷”/“热”执行功能缺陷影响ADHD儿童核心症状的作用机制

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心理科学进展 2023年第11期31卷 2106-2128页

作者：王雪珂冯廷勇西南大学心理学部重庆400715

注意缺陷多动障碍(ADHD)是一种以注意缺陷和(或)多动、冲动为核心症状的神经发育障碍,与前额叶发育异常所致的执行功能缺陷密切相关。基于此,从神经−认知−行为的发展途径提出执行功能缺陷可能是认知层面上导致ADHD核心症状的发病机理,... 详细信息

注意缺陷多动障碍(ADHD)是一种以注意缺陷和(或)多动、冲动为核心症状的神经发育障碍,与前额叶发育异常所致的执行功能缺陷密切相关。基于此,从神经−认知−行为的发展途径提出执行功能缺陷可能是认知层面上导致ADHD核心症状的发病机理,其中与背侧前额叶相关的“冷”执行功能缺陷可能是导致注意缺陷核心症状的主导因素,而与腹内侧前额叶相关的“热”执行功能缺陷可能是导致多动、冲动核心症状的主导因素。一方面,“冷”执行功能缺陷主要引起工作记忆表征维持失败、抑制控制能力不足、认知转换困难等方面,这些缺陷进一步导致了个体在注意持续、注意选择和注意转移上受到限制;另一方面,“热”执行功能缺陷则带来厌恶延迟、奖赏加工异常、动机失调等问题,使得个体行为抑制失败,更容易做出冲动性选择,从而表现出多动、冲动等核心症状。未来研究应进一步检验和完善“冷”、“热”执行功能缺陷影响ADHD核心症状的理论模型以及从认知神经层面上提供更多的实证证据,同时还需从生态层面考察“冷”和“热”执行功能缺陷对ADHD核心症状的交互影响,并基于执行功能开发对ADHD核心症状具有个性化、精准化、长效化的干预方案。

关键词：注意缺陷多动障碍执行功能缺陷核心症状前额叶皮层作用机制

注意缺陷多动障碍儿童多模态评估的现状与建议

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中国儿童保健杂志 2024年第6期32卷 586-590,601页

作者：冯廷勇王雪珂西南大学心理学部重庆400715

注意缺陷多动障碍(ADHD)是一种源于儿童期的神经发育障碍。多模态评估不仅能够提供丰富的信息以促进对ADHD更准确的诊断,还能为制定精准的个体化治疗方案提供决策依据。因此,本文就ADHD当前的评估现状、多模态评估方法以及未来的发展趋... 详细信息

注意缺陷多动障碍(ADHD)是一种源于儿童期的神经发育障碍。多模态评估不仅能够提供丰富的信息以促进对ADHD更准确的诊断,还能为制定精准的个体化治疗方案提供决策依据。因此,本文就ADHD当前的评估现状、多模态评估方法以及未来的发展趋势进行阐述和探讨,旨在增进对多模态评估方法的认识和应用,提升ADHD儿童的诊疗质量。

关键词：注意缺陷多动障碍多模态评估个性化治疗

四川盆地中西部区域性超压特征与天然气大规模聚集的关系

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天然气工业 2023年第12期43卷 1-13页

作者：李伟谢武仁王雪珂中国石油勘探开发研究院

四川盆地近20年来持续发现大型、超大型气田,其天然气大规模聚集的成藏机理却众说纷纭,尤其是地层超压如何有效促进大气田形成的机理已经成为地质学家研究的重点。为此,基于实测地层压力与钻井液密度等开展了地层压力系数与视地层压力... 详细信息

四川盆地近20年来持续发现大型、超大型气田,其天然气大规模聚集的成藏机理却众说纷纭,尤其是地层超压如何有效促进大气田形成的机理已经成为地质学家研究的重点。为此,基于实测地层压力与钻井液密度等开展了地层压力系数与视地层压力系数的计算与分析,并结合天然气成藏地质条件与气藏发育规律,探讨了四川盆地中西部重点地区超压体系基本特征及其与天然气富集的关系。研究结果表明:①四川盆地中西部地区除山前破碎带、西南部地区喜马拉雅期隆升破裂带外,其他大部分地区普遍存在超压现象,超压地层的厚度介于4000~8000 m;②超压普遍发育,天然气大规模聚集的区域性直接盖层变得模糊与不重要,导致岩性气藏的大规模、大面积、多层系发育成为可能;③巨厚超压层及其内部断裂的发育,促进了气源充足、构造相对稳定区天然气多层系与多区带规模成藏。结论认为,四川盆地中、西部地区构造相对稳定区巨厚层超压的形成,是现今天然气得以多层位与多区带大规模聚集的重要机制,巨厚超压层内部与其下部地层压力系数较低的区域是最有利于大型气田形成的区域。

关键词：四川盆地中西部区域性超压超压强度超压层超压封存天然气大规模聚集

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“凝聚民心”与“团结力量”:全过程人民民主与统一战线的价值、制度与行动链接

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社会科学 2024年第1期 105-117,142页

作者：程同顺王雪珂南开大学周恩来政府管理学院

全过程人民民主是最广泛、最真实、最管用的民主,统一战线是范围最广、规模最大、程度最高的大团结与大联合,二者统一于中国共产党领导下的中国式现代化进程之中。在价值、制度与行动构成的三重框架下,全过程人民民主“以人民为中心”... 详细信息

全过程人民民主是最广泛、最真实、最管用的民主,统一战线是范围最广、规模最大、程度最高的大团结与大联合,二者统一于中国共产党领导下的中国式现代化进程之中。在价值、制度与行动构成的三重框架下,全过程人民民主“以人民为中心”的理论意涵是统一战线内生蕴含的联合、共同、统一、安全等价值理念的核心依归;全过程人民民主制度体系中的政治协商制度、民族区域自治制度、“一国两制”制度、总体国家安全观等制度架构,又与统一战线指向的巩固新型政党制度、铸牢中华民族共同体意识、促进国家统一、维护国家安全等内容相互映照;全过程人民民主在基层政治实践中所重视的协商、自治、协同、安全等方式和要素,又恰与统一战线的行动要求相互嵌合。在此基础上,全过程的民主与全要素的团结共同统一于以“凝聚民心”和“团结力量”为目标的国家建设和民族复兴的伟大事业之中。

关键词：全过程人民民主统一战线价值制度行动