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Leakage Proof,Flame-Retardant,and Electromagnetic Shield Wood Morphology Genetic Composite Phase Change Materials for Solar Thermal Energy Harvesting

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Nano-Micro Letters 2024年第10期16卷 99-120页

作者： Yuhui Chen yang Meng Jiangyu Zhang Yuhui Xie Hua Guo Mukun He Xuetao Shi Yi Mei xinxin Sheng Delong Xie Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials The International Joint Laboratory for Sustainable Polymers of Yunnan ProvinceThe Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan ProvinceFaculty of Chemical EngineeringKunming University of Science and TechnologyKunming 650500People's Republic of China Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006People's Republic of China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'anShaanxi 710072People's Republic of China

Phase change materials(PCMs)offer a promising solution to address the challenges posed by intermittency and fluctuations in solar thermal ***,for organic solid-liquid PCMs,issues such as leakage,low thermal conductivity,lack of efficient solar-thermal media,and flamma-bility have constrained their broad ***,we present an innova-tive class of versatile composite phase change materials(CPCMs)developed through a facile and environmentally friendly synthesis approach,leveraging the inherent anisotropy and unidirectional porosity of wood aerogel(nanowood)to support polyethylene glycol(PEG).The wood modification process involves the incorporation of phytic acid(PA)and MXene hybrid structure through an evaporation-induced assembly method,which could impart non-leaking PEG filling while concurrently facilitating thermal conduction,light absorption,and ***,the as-prepared wood-based CPCMs showcase enhanced thermal conductivity(0.82 W m^(-1)K^(-1),about 4.6 times than PEG)as well as high latent heat of 135.5 kJ kg^(-1)(91.5%encapsula-tion)with thermal durability and stability throughout at least 200 heating and cooling cycles,featuring dramatic solar-thermal conversion efficiency up to 98.58%.In addition,with the synergistic effect of phytic acid and MXene,the flame-retardant performance of the CPCMs has been significantly enhanced,showing a self-extinguishing ***,the excellent electromagnetic shielding of 44.45 dB was endowed to the CPCMs,relieving contemporary health hazards associated with electromagnetic ***,we capitalize on the exquisite wood cell structure with unidirectional transport inherent in the development of multifunctional CPCMs,showcasing the operational principle through a proof-of-concept prototype system.

关键词： Wood PCMs MXene Solar thermal storage and conversion Flame-retardant Electromagnetic shielding

pH- and near-infrared light-responsive,biomimetic hydrogels from aqueous dispersions of carbon nanotubes

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Nano Research 2024年第4期17卷 3120-3129页

作者： Lulin Hu xinxin Yu Jingcheng Hao Lu Xu Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 264000China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Yantai Center for Food and Drug Control Yantai 264000China Key Laboratory of Colloid and Interface Chemistry&Key Laboratory of Special Aggregated Materials Shandong UniversityJinan 250100China

Owing to their low flexibility,poor processability and a lack of responsiveness,inorganic materials are usually non-ideal for constructing a living ***,to date,lifelike materials with structural hierarchies and adaptive properties usually rely on light and soft organic molecules,although few exceptions have been acquired using two-dimensional(2D)inorganic ***,with a systematic study on the gelation behavior of carbon-based 0D quantum dots,1D nanotubes,and 3D fullerenes,we find that acidified 1D carbon nanotubes(CNTs)can serve as an alternative building block for fabricating purely inorganic biomimetic soft *** as-prepared CNT gels exhibit not only a pH-or photothermal-triggered mechanical and tribological adaptivity,which allows them to simulate the behavior of sea cucumbers,peacock mantis shrimps,and mammalian muscles or cortical bones,but also a unique damping property that is similar to spider’s cuticular *** high elasticity,effective lubrication,excellent biocompatibility,and controllable friction and wear also allow them to function as a new type of smart lubricants,whose tribological properties can be regulated either by its internal pH changes or spatiotemporally by near-infrared(NIR)light irradiations,free of any toxic and flammable base oils or additives.

关键词： biomimetic hydrogels carbon nanotubes(CNTs) mechanical and tribological adaptivity pH-and near-infrared(NIR)light responsiveness switchable lubrication

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基于模糊C-means的多视角聚类算法

中南大学学报（自然科学版） 2015年第6期46卷 2128-2133页

作者：杨欣欣黄少滨哈尔滨工程大学计算机科学与技术学院黑龙江哈尔滨150001

目前多数多视角聚类算法属于"刚性"划分算法,不适用于处理具有聚簇重叠结构的数据集,为此,提出一种基于模糊C-means的多视角聚类算法(简称FCM-MVC),该算法利用隶属度描述对象与类别的关系,能够更真实地描述具有聚簇重叠结构数据集的聚... 详细信息

目前多数多视角聚类算法属于"刚性"划分算法,不适用于处理具有聚簇重叠结构的数据集,为此,提出一种基于模糊C-means的多视角聚类算法(简称FCM-MVC),该算法利用隶属度描述对象与类别的关系,能够更真实地描述具有聚簇重叠结构数据集的聚类结果。FCM-MVC算法同时利用多个视角信息,自动计算每个视角的权重。研究结果表明:FCM-MVC算法能够有效处理具有聚簇重叠结构的数据集;与已有的3种经典的多视角聚类算法相比,该算法获得的聚类精度更高。

关键词：多视角聚类模糊C-means 数据挖掘

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基于图划分的网状高阶异构数据联合聚类算法

四川大学学报（工程科学版） 2014年第2期46卷 105-110页

作者：杨欣欣黄少滨哈尔滨工程大学计算机科学与技术学院哈尔滨150001

目前已有的高阶联合聚类算法主要集中于分析星型高阶异构数据,然而实际应用中,存在大量网状高阶异构数据。为了有效挖掘网状高阶异构数据内部隐藏的结构,提出一种基于图划分的高阶联合聚类算法(简称为GPHCC),该算法将网状高阶异构数据... 详细信息

目前已有的高阶联合聚类算法主要集中于分析星型高阶异构数据,然而实际应用中,存在大量网状高阶异构数据。为了有效挖掘网状高阶异构数据内部隐藏的结构,提出一种基于图划分的高阶联合聚类算法(简称为GPHCC),该算法将网状高阶异构数据的聚类问题转化为多对二部图的最小正则割划分问题。为了降低计算复杂度,将此优化问题转化为半正定问题求解。实验结果表明GPHCC算法优于目前已有的5种2阶联合聚类算法和5种高阶联合聚类算法。

关键词：网状结构高阶异构数据联合聚类谱聚类

Research on the Sports Events Differences of Ideological and Political Education in the Integration Course of College Physical Education

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Research on the Sports Events Differences of Ideological and...

A social cognitive study on the policy of pre-school physical fitness assessment in high school

作者： Guobiao yang xinxin yang Junjun Dai School of P.E. Xidian University

Different sports events possess diverse styles and performance forms. When we discuss how to integrate ideological and political education into Physical Education Class, we can’t generalize all sports elective courses. Obviously, upon analysis and comparison of different sports, there is a significant difference between the collective and individual sports, physical fitness and skills, Olympic and non-olympic sports, etc., there was a significant difference between the participants exercise goals and psychological motivation. In order to better run ideological and political work through the whole process of education and teaching, the realization of all-round strategy of educating students should be made. The effect of Ideological and political education in PE class will be achieved after,through the effective promotion curriculum thought politics and the university physical education curriculum fusion development, finally realizes the physical education classroom thought education effect.

关键词： Physical Education Integration Course Ideological and Political Events Difference

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A social cognitive study on the policy of pre-school physica...

作者： Guobiao yang Hongyan Xu xinxin yang School of P.E. Xidian University

In recent years, the high school has begun to carry out pre school physical fitness tests. The implementation of this policy is in line with the objectives of Physical Education of the Ministry of Education and the competent departments of education administration. The implementation of this policy has promoted the realization of the objectives of Physical Education for middle school students and injected new impetus into physical education and teaching, strengthened the student’s exercise motive, promoted the middle school student’s sports participation, promoted the student physical quality. From the angle of social cognition, this paper analyzes the influence on different students by investigating the present situation of the implementation of the physical quality examination policy in China, and gives theoretical guidance for the improvement of the physical quality examination policy in China.

关键词： Social cognition Physical fitness Physical education Assessment High school

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柴芩清窍汤治疗分泌性中耳炎的疗效和安全性

系统医学 2024年第1期9卷 37-41页

作者：洪静杨欣欣杨俊连中国人民解放军总医院第五医学中心耳鼻喉科北京100039

目的评估柴芩清窍汤治疗分泌性中耳炎疗效和安全性。方法选取2021年8月—2022年8月中国人民解放军总医院第五医学中心耳鼻喉科收治的80例分泌性中耳炎患者作为研究对象,根据计算机软件随机分为对照组和观察组,每组40例。对照组口服盐酸... 详细信息

目的评估柴芩清窍汤治疗分泌性中耳炎疗效和安全性。方法选取2021年8月—2022年8月中国人民解放军总医院第五医学中心耳鼻喉科收治的80例分泌性中耳炎患者作为研究对象,根据计算机软件随机分为对照组和观察组,每组40例。对照组口服盐酸氨溴索,观察组在对照组基础上口服柴芩清窍汤。治疗两周后,对比两组患者临床治疗有效率、气导纯音听阈均值、中医症状积分、炎性因子变化及治疗期间不良反应发生率。结果治疗两周后,观察组总有效率明显高于对照组,差异有统计学意义(P0.05)。结论柴芩清窍汤治疗分泌性中耳炎可有效提高治疗效果,改善临床症状,减少炎症反应,且不良反应较少。

关键词：柴芩清窍汤分泌性中耳炎有效性安全性

不同冷却模式下高温花岗岩力学特性演变规律试验研究

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太原理工大学学报 2024年第2期55卷 267-275页

作者：辛国旭郤保平杨欣欣董赟盛何水鑫吴阳春太原理工大学矿业工程学院太原030024 太原理工大学原位改性采矿教育部重点实验室太原030024 中南大学资源与安全学院长沙410006

【目的】探索相同高温状态下花岗岩在不同冷却模式(20℃水中热冲击冷却和20℃空气中自然冷却)下不同的力学特性。【方法】采用实验室自研热冲击破裂实验平台,对两种冷却模式下不同温度状态(25~600℃)花岗岩进行单轴抗压、巴西劈裂、变... 详细信息

【目的】探索相同高温状态下花岗岩在不同冷却模式(20℃水中热冲击冷却和20℃空气中自然冷却)下不同的力学特性。【方法】采用实验室自研热冲击破裂实验平台,对两种冷却模式下不同温度状态(25~600℃)花岗岩进行单轴抗压、巴西劈裂、变角剪切试验,测试其单轴抗压强度、抗拉强度、内聚力、内摩擦角宏观力学参数,研究不同冷却模式下高温花岗岩力学特性的演变规律。【结果】结果表明:1)冷却模式对单轴抗压强度、抗拉强度、内聚力的影响较大,对内摩擦角几乎无影响;2)相同高温状态下花岗岩力学强度在20℃水中热冲击冷却劣化更严重,且300℃为两种冷却模式出现差异的阈值温度;3)当加热温度为600℃时,热冲击冷却后花岗岩的单轴抗压强度、抗拉强度、抗剪强度(内聚力)与自然冷却模式下相比分别降低了27.6%、51.7%、33%,这说明冷却模式对花岗岩力学强度影响从大到小依次为抗拉强度、抗剪强度、抗压强度。【结论】研究结果可为相同工况下高温岩石力学工程岩体稳定性分析提供了一定的参考。

关键词：高温花岗岩冷却模式热冲击力学特性演变规律

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A New Vehicle Detection Framework Based on Feature-Guided in the Road Scene

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Computers, Materials & Continua 2024年第1期78卷 533-549页

作者： Tianmin Deng Xiyue Zhang xinxin Cheng School of Traffic and Transportation Chongqing Jiaotong UniversityChongqing400074China

Vehicle detection plays a crucial role in the field of autonomous driving ***,directly applying deep learning-based object detection algorithms to complex road scene images often leads to subpar performance and slow inference speeds in vehicle *** a balance between accuracy and detection speed is crucial for real-time object detection in real-world road *** paper proposes a high-precision and fast vehicle detector called the feature-guided bidirectional pyramid network(FBPN).Firstly,to tackle challenges like vehicle occlusion and significant background interference,the efficient feature filtering module(EFFM)is introduced into the deep network,which amplifies the disparities between the features of the vehicle and the ***,the proposed global attention localization module(GALM)in the model neck effectively perceives the detailed position information of the target,improving both the accuracy and inference speed of ***,the detection accuracy of small-scale vehicles is further enhanced through the utilization of a four-layer feature pyramid *** results show that FBPN achieves an average precision of 60.8% and 97.8% on the BDD100K and KITTI datasets,respectively,with inference speeds reaching 344.83 frames/s and 357.14 frames/*** demonstrates its effectiveness and superiority by striking a balance between detection accuracy and inference speed,outperforming several state-of-the-art methods.

关键词： Driverless car vehicle detection channel attention mechanism deep learning