检索结果-南通市图书馆

体教融合视域下高职院校体育人才培养问题及路径研究

在线全文

学校读者我要写书评

暂无评论

当代体育科技 2023年第25期13卷 60-63页

作者：张天羽李浩咸阳职业技术学院陕西咸阳712000 西安体育学院陕西西安710068

近些年,我国体育事业改革工作开展得如火如荼,体育与教育的融合发展已是必然之趋。随着社会经济的快速发展,体教结合的人才选培模式不断暴露出各种各样的问题,使得体育和教育间的矛盾愈发凸显,给高校体育工作的开展造成了巨大阻碍。高... 详细信息

近些年,我国体育事业改革工作开展得如火如荼,体育与教育的融合发展已是必然之趋。随着社会经济的快速发展,体教结合的人才选培模式不断暴露出各种各样的问题,使得体育和教育间的矛盾愈发凸显,给高校体育工作的开展造成了巨大阻碍。高校体育人才培养还存在很多不足之处,培养的体育人才和社会实际所需存在较大差距。自提出体教融合理念后,如何利用该理念开展体育人才的培养,是体育人需重点思考的问题。因此,高校需顺应体教融合的要求,让体育和教育联合发力,培养出更多优秀体育人才,更大程度地满足社会的人才需求。鉴于此,该文对体教融合的必要性进行探讨,并对高校体育人才培养问题进行研究,同时提出体育人才培养的创新路径。

关键词：体教融合高校体育人才培养创新

维普期刊数据库博看期刊

Numerical simulations of partial elements excitation for hemispherical high-intensity focused ultrasound phased transducer

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第7期30卷 668-677页

作者：张艳秋张浩孙天宇潘婷王佩国菅喜岐 School of Biomedical Engineering&Technology Tianjin Medical UniversityTianjin 300070China College of Precision Instruments and Optoelectronics Engineering Tianjin UniversityTianjin 300072China Department of Radiotherapy Cancer Institute and Hospital of Tianjin Medical UniversityTianjin 300070China

The hemispherical phased transducer maximizes the coverage of the skull and the ultrasonic energy per unit area of the skull is minimized,thereby reducing the risk of skull burns,but the transducer has a small focal area adjustment range,increasing the focal length of treatment is an urgent question for this type of *** this paper,a three-dimensional high-intensity focused ultrasound(HIFU)transcranial propagation model is established based on the human head *** finite difference time domain(FDTD)is combined with the Westervelt acoustic wave nonlinear propagation equation and Penne's biological heat conduction equation for numerical simulation of the sound pressure field and temperature *** a treatable focal area in a small-opening hemispherical transducer with a small amount of numerical simulation calculation focusing at a set position to determine the minimum partial excitation area ratio of *** then,applying these preliminary results to a large-opening diameter hemispherical transducer and the temperature field formed by it or full excitation is *** results show that the focus area with the excitation area ratio of less than 22%moves forward to the transducer side when the excitation sound is *** the excitation area ratio is greater than or equal to 23%,it focuses at the set *** the case of partial incentives,using 23%of the partial array,the adjustable range of the treatable focal area formed in the three-dimensional space is larger than that of the full excitation.

关键词： high-intensity focused ultrasound partial elements excitation simulation phased transducer

基于绿证-阶梯式碳交易交互的源荷互补调度优化

在线全文

学校读者我要写书评

暂无评论

中国电力 2023年第9期56卷 149-156页

作者：孟宇翔马刚李豪李伟康徐健玮李天宇南京师范大学电气与自动化工程学院江苏南京210046

针对多能耦合的区域综合能源系统的低碳经济运行问题,提出基于绿证-阶梯式碳交易交互的源荷互补优化调度模型。首先,通过引入绿证-阶梯式碳交易交互机制来提高源侧可再生能源的消纳水平和降低系统碳排放量;其次,在负荷侧引入考虑用户满... 详细信息

针对多能耦合的区域综合能源系统的低碳经济运行问题,提出基于绿证-阶梯式碳交易交互的源荷互补优化调度模型。首先,通过引入绿证-阶梯式碳交易交互机制来提高源侧可再生能源的消纳水平和降低系统碳排放量;其次,在负荷侧引入考虑用户满意度的激励型需求响应和调峰收益来实现热电负荷的“削峰填谷”;最后,以日运行成本最小化为目标,采用Cplex求解器对模型进行求解。算例结果表明:绿证-阶梯式碳交易交互机制有助于充分发挥激励型需求响应的优化能力,提高源侧可再生能源的消纳能力,实现源荷侧协同降碳,降低系统运行成本,有效提高系统运行的绿色性、低碳性和经济性。

关键词：源荷互补绿色电力证书阶梯式碳交易交互机制

柯里拉京抑制LPS和ATP激活的NLRP3炎症小体和巨噬细胞焦亡

在线全文

学校读者我要写书评

暂无评论

免疫学杂志 2023年第4期39卷 296-304页

作者：罗甜裕周小艺秦敏燕张莹潘浩黄晓迪广州中医药大学基础医学院人体解剖学系 510006 广州中医药大学基础医学院中西医结合基础研究中心暨南大学生命科学技术学院免疫生物学系广州510632

目的探讨柯里拉京对细菌脂多糖(LPS)联合腺嘌呤核苷三磷酸(ATP)诱导的巨噬细胞内NLRP3炎症小体活化和细胞焦亡的调控作用和机制。方法采用CCK8试剂检测不同浓度柯里拉京对J774A.1细胞活力的影响;碘化丙啶(PI)染色和乳酸脱氢酶(LDH)释放... 详细信息

目的探讨柯里拉京对细菌脂多糖(LPS)联合腺嘌呤核苷三磷酸(ATP)诱导的巨噬细胞内NLRP3炎症小体活化和细胞焦亡的调控作用和机制。方法采用CCK8试剂检测不同浓度柯里拉京对J774A.1细胞活力的影响;碘化丙啶(PI)染色和乳酸脱氢酶(LDH)释放检测柯里拉京对LPS+ATP诱导的细胞死亡的影响。Western blot法检测细胞上清液中炎症小体活化标志物caspase-1 p20(Mr20000)和成熟IL-1β(Mr17000)的表达水平,以及检测细胞内NLRP3、ASC、caspase-1、IL-1β前体(pro-IL-1β)和焦亡执行蛋白GSDMD的表达。ELISA检测细胞培养上清液中IL-1β的水平。活性氧(ROS)荧光探针H2DCFDA染色观察柯里拉京对ROS产生的影响。结果柯里拉京浓度小于40μmol·L-1时对细胞活性影响较小。柯里拉京减少LPS+ATP刺激的细胞内PI阳性细胞的比例和LDH的释放。柯里拉京抑制LPS+ATP刺激的巨噬细胞内GSDMD蛋白N末端(GSDMD-NT)的表达,以及减少细胞释放caspase-1 p20和成熟IL-1β到培养上清。柯里拉京抑制细胞分泌炎症因子IL-1β和减少ROS的产生。然而ROS的诱导剂鱼藤酮能拮抗柯里拉京抑制NLRP3炎症小体活化和细胞焦亡的作用。结论柯里拉京抑制LPS+ATP诱导的巨噬细胞内NLRP3炎症小体活化和细胞焦亡依赖于抗氧化作用。

关键词：柯里拉京巨噬细胞 NLRP3炎症小体细胞焦亡抗氧化

在线全文

学校读者我要写书评

暂无评论

基于机器视觉的风力机叶片故障检测技术研究

太阳能学报 2023年第4期44卷 209-215页

作者：朱恩龙冯聪聪申振腾史天宇亓豪孙波文天津科技大学机械工程学院天津300222 天津市轻工与食品工程机械装备集成设计与在线监控重点实验室天津300222 天津中科智能识别有限公司天津300457

针对运行中的风力机叶片,提出一种基于机器视觉特征分类的故障诊断方法。通过对叶片叶尖进行圆形标记,利用工业相机周期性获取叶片尖端的图像,并在Halcon软件上对图像进行预处理,对大雾天气下采集的图像利用暗通道除雾算法进行清晰化处... 详细信息

针对运行中的风力机叶片,提出一种基于机器视觉特征分类的故障诊断方法。通过对叶片叶尖进行圆形标记,利用工业相机周期性获取叶片尖端的图像,并在Halcon软件上对图像进行预处理,对大雾天气下采集的图像利用暗通道除雾算法进行清晰化处理。利用叶尖标记检测算法提取标记、计算区域圆度和区域中心等区域特征。对相邻叶片上标记计算位移差,并与系统预警阈值比较,判断叶片在扭转或偏摆方向的变形程度和故障趋势,从而实现风力机叶片变工况运行状态在线检测和自适应预警。

关键词：风力机叶片故障检测图像处理机器视觉特征分类

压制压力对Cu_(60)Cr_(40)合金微波烧结组织的影响

在线全文

学校读者我要写书评

暂无评论

粉末冶金工业 2022年第5期32卷 90-95页

作者：王杨董中奇李天宇张保玉刘浩河北工业职业技术学院金属材料工程系河北石家庄050091

采用机械合金化和冷压微波烧结法制备了Cu_(60)Cr_(40)合金,并测定合金的致密度和相组成,研究了不同压制压力下Cu_(60)Cr_(40)合金组织的演变规律。结果表明:Cu_(60)Cr_(40)合金粉体和冷压坯组织呈层片状;随压制压力的提高,Cu_(60)Cr_(... 详细信息

采用机械合金化和冷压微波烧结法制备了Cu_(60)Cr_(40)合金,并测定合金的致密度和相组成,研究了不同压制压力下Cu_(60)Cr_(40)合金组织的演变规律。结果表明:Cu_(60)Cr_(40)合金粉体和冷压坯组织呈层片状;随压制压力的提高,Cu_(60)Cr_(40)合金冷压坯的致密程度逐渐提高,冷态下由疏松逐渐密实,成形性提高;在微波烧结后Cu_(60)Cr_(40)合金组织呈现层片状,随压制压力的增加晶界逐渐明显,空隙减少,致密度增加。

关键词： Cu_(60)Cr_(40)合金冷压强度微波烧结压制压力致密度

洛杉矶和长滩港口拥堵分析及对我国港口发展的启示

在线全文

学校读者我要写书评

暂无评论

综合运输 2022年第3期44卷 119-125页

作者：朱吉双马昊唐天雨交通运输部水运科学研究院北京100088 大连海事大学辽宁大连116026 舟山市港航事业发展中心浙江舟山316021

新冠肺炎疫情影响下美国西海岸港口出现严重拥堵,导致国际物流和供应链局部断裂。本文首先从供需平衡角度分析洛杉矶港和长滩港的能力适应性问题,根据锚地船舶数量、平均停泊时间等指标对港口拥堵程度进行分析。然后分析美国政府采取的... 详细信息

新冠肺炎疫情影响下美国西海岸港口出现严重拥堵,导致国际物流和供应链局部断裂。本文首先从供需平衡角度分析洛杉矶港和长滩港的能力适应性问题,根据锚地船舶数量、平均停泊时间等指标对港口拥堵程度进行分析。然后分析美国政府采取的缓解港口拥堵措施,并对政策实施效果进行评价。最后从提升港口服务可靠性、推动疫情防控跨国合作、加强港口生产动态监测等方面对我国港口高质量发展提出对策建议。

关键词：洛杉矶港长滩港拥堵疫情可靠性

Rapid phenotypic evolution with shallow genomic differentiation during early stages of high elevation adaptation in Eurasian Tree Sparrows

在线全文

学校读者我要写书评

暂无评论

National Science Review 2020年第1期7卷 113-127页

作者： Yanhua Qu Chunhai Chen Ying Xiong Huishang She Yong E Zhang Yalin Cheng Shane Du Bay Dongming Li Per G P Ericson Yan hao Hongyuan Wang Hongfeng Zhao Gang Song Hailin Zhang Ting Yang Chi Zhang Liping Liang tianyu Wu Jinyang Zhao Qiang Gao Weiwei Zhai Fumin Lei China National Gene Bank BGI-Shenzhen Human Genetics Genome Institute of Singapore Agency for Science Technology and Research Key Laboratory of Zoological Systematics and Evolution Institute of Zoology Chinese Academy of Sciences BGI Genomics BGI-Shenzhen University of Chinese Academy of Sciences Center for Excellence in Animal Evolution and Genetics Chinese Academy of Sciences Committee on Evolutionary Biology University of Chicago Life Sciences Section Integrative Research Center Field Museum of Natural History Key Laboratory of Animal Physiology Biochemistry and Molecular Biology of Hebei Province College of Life Sciences Hebei Normal University Department of Bioinformatics and Genetics Swedish Museum of Natural History College of Life Sciences Shaanxi Normal University

Known as the ‘third polar region’, the Qinghai-Tibet Plateau represents one of the harshest highland environments in the world and yet a number of organisms thrive there. Previous studies of birds, animals and humans have focused on well-differentiated populations in later stages of phenotypic divergence. The adaptive processes during the initial phase of highland adaptation remain poorly understood. We studied a human commensal, the Eurasian Tree Sparrow, which has followed human agriculture to the Qinghai-Tibet Plateau. Despite strong phenotypic differentiation at multiple levels, in particular in muscle-related phenotypes, highland and lowland populations show shallow genomic divergence and the colonization event occurred within the past few thousand years. In a one-month acclimation experiment investigating phenotypic plasticity, we exposed adult lowland tree sparrows to a hypoxic environment and did not observe muscle changes. Through population genetic analyses, we identified a signature of polygenic adaptation, whereby shifts in allele frequencies are spread across multiple loci, many of which are associated with muscle-related processes. Our results reveal a case of positive selection in which polygenic adaptation appears to drive rapid phenotypic evolution, shedding light on early stages of adaptive evolution to a novel environment.

关键词： denovo genome early stage adaptation high elevation muscle phenotypes polygenic adaptation regulatory evolution

Autocatalytic reduction-assisted synthesis of segmented porous PtTe nanochains for enhancing methanol oxidation reaction

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Research Energy 2023年第1期2卷 140-147页

作者： Qiqi Zhang tianyu Xia He Huang Jialong Liu Mengyuan Zhu hao Yu Weifeng Xu Yuping Huo Congli He Shipeng Shen Cong Lu Rongming Wang Shouguo Wang Institute of Advanced Materials Beijing Normal UniversityBeijing 100875China College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China Key Laboratory of Materials Physics of the Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China Beijing Advanced Innovation Center for Materials Genome Engineering School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China Department of Physics and Electronics School of Mathematics and PhysicsBeijing University of Chemical TechnologyBeijing 100029China Synchrotron Radiation Research Center Hyogo Science and Technology AssociationTatsuno 6795165Japan Institute for Multidisciplinary Innovation University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Anhui UniversityHefei 230601China

Morphology engineering has been developed as one of the most widely used strategies for improving the performance of ***,the harsh reaction conditions and cumbersome reaction steps during the nanomaterials synthesis still limit their industrial ***,one-dimensional(1D)novel-segmented PtTe porous nanochains(PNCs)were successfully synthesized by the template methods assisted by Pt autocatalytic *** PtTe PNCs consist of consecutive mesoporous architectures that provide a large electrochemical surface area(ECSA)and abundant active sites to enhance methanol oxidation reaction(MOR).Furthermore,1D nanostructure as a robust sustaining frame can maintain a high mass/charge transfer rate in a long-term durability *** 2,000 cyclic voltammetry(CV)cycles,the ECSA value of PtTe PNCs remained as high as 44.47 m^(2)·gPt^(-1),which was much larger than that of commercial Pt/C(3.95 m^(2)·gPt^(-1)).The high catalytic activity and durability of PtTe PNCs are also supported by CO stripping test and density functional theory *** autocatalytic reduction-assisted synthesis provides new insights for designing efficient low-dimensional nanocatalysts.

关键词： autocatalytic process PtTe catalysts methanol oxidation reactions porous nanochain