检索结果-南通市图书馆

Suppressing interfacial polarization via entropy increase strategy for superior energy-storage performance of Na_(0.5)Bi_(0.5)TiO_(3)-based ceramics

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2024年第4期10卷 947-955页

作者： Hanyu Zhao Wenjun Cao Donghao Han xiyue zhu Cen Liang Changyuan Wang Chunchang Wang Laboratory of Dielectric Functional Materials School of Physics&Materials ScienceAnhui UniversityHefei230601China

High entropy engineering has emerged as a new strategy to improve the energy storage density and efficiency of dielectric capacitors due to its unique design ***,the recyclable energy storage density(Wrec)reported so far has never exceeded 2 J/cm^(3) for the type of high-entropy ceramics with equimolar elements occupying A or B *** order to improve this type high-entropy ***_(0.5)Bi_(0.5)TiO_(3)(NBT)was used as the matrix,equimolar Sr^(2+),La^(3+),K^(+)and Ba^(2+)were gradually introduced into at the A-site of the matrix lattice to increase configurational *** results show that the relaxor degree,band gap width,interfacial polarization,and breakdown field strength are effectively improved with increasing *** them,suppressing interfacial polarization is an important factor to increase the breakdown field strength and thus enhance the energy storage ***(Na1/6Bi1/6Sr1/6La1/6K1/6Ba1/6)TiO_(3)(NBSLKBT)sample with the highest configurational entropy shows an ultra-high Wrec of 9.8 J/cm^(3) and the energy storage efficiency(η=86.5%).This work demonstrates that entropy strategy for superior energy-storage performance still works on the above type high-entropy ceramics and opens up a new way of modulating interface polarization by entropy increase strategy.

关键词： High entropy ceramics Energy storage Interfacial polarization Configurational entropy

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于半监督深度学习的光学性能监测

激光与光电子学进展 2024年第13期61卷 253-260页

作者：李震文朱禧月程昱广东工业大学信息工程学院广州广东510006

针对在动态光网络中使用传统深度学习进行多节点光信号监测时存在需要大量标记样本、无标记样本没能得到充分利用和样本标记困难等问题,提出一种基于半监督深度学习的光学性能监测方法,将大量未标记的异步延迟抽头图作为FixMatch模型的... 详细信息

针对在动态光网络中使用传统深度学习进行多节点光信号监测时存在需要大量标记样本、无标记样本没能得到充分利用和样本标记困难等问题,提出一种基于半监督深度学习的光学性能监测方法,将大量未标记的异步延迟抽头图作为FixMatch模型的输入进行光信噪比监测。研究结果表明,与半监督学习Mean Teacher和卷积神经网络等传统方法相比,FixMatch方法在数据标记率仅为10%、传输速度为40 Gbit/s且调制格式分别为16阶正交振幅调制(QAM)、32QAM和64QAM的情况下,分别实现了100.00%、98.67%和98.44%的分类精度;将数据标记率降到5%,FixMatch方法也能保持99.33%、96.00%和97.67%的优秀分类结果。同时通过色散实验得到,相较于其他方法,FixMatch方法具有明显优势。此外,将其视为分类和回归任务得到的分类精度和平均绝对误差分别为99.33%和0.095 dB。这证明了利用未标记数据能有效提高光学性能监测模型的性能和泛化能力。此外,还讨论了较低数据标记率对该方法的影响。

关键词：光通信光学性能监测半监督深度学习光信噪比监测异步延迟抽头采样

逻辑、困境与出路:体育与健康学科核心素养课程化研究

在线全文

学校读者我要写书评

暂无评论

武汉体育学院学报 2024年第9期58卷 82-89页

作者：李萍王军将朱晞阅王宏武汉体育学院武术学院湖北武汉430079 湖南师范大学体育学院湖南长沙410081

运用文献考证、学理思辨和逻辑分析等方法,围绕体育与健康学科核心素养课程化实践进行概念辨析和文献梳理;厘清了体育与健康学科核心素养课程化实践的驱动要素和生成逻辑,并据此提出纾解策略,为新时期学校体育课程改革提供理论参考。研... 详细信息

运用文献考证、学理思辨和逻辑分析等方法,围绕体育与健康学科核心素养课程化实践进行概念辨析和文献梳理;厘清了体育与健康学科核心素养课程化实践的驱动要素和生成逻辑,并据此提出纾解策略,为新时期学校体育课程改革提供理论参考。研究认为,体育与健康学科核心素养课程化实践在宏观上存在理论体系的逻辑自洽性不足、中观上存在用“硬约束”手段引导教师的理念转轨、微观上存在底层逻辑的解释力不足等问题,使得体育与健康学科核心素养课程化实践的平台、方式、层次、类别、环境等“场域”不足以支撑“惯习”的形成。针对此,提出纾解路径:补齐理论短板,构建体育与健康学科核心素养课程化闭环式理论体系;加强教师培养,不断更新教师知识结构和技能体系;抓住“少数关键”,设计贴近学生体育认知发展的课程实践方案;构建实践共同体,引导学生实现跨学科能力的角色转变。

关键词：体育与健康学科核心素养课程化一体化模式实践共同体

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

基于卷积神经网络的光信噪比监测方法

激光杂志 2024年第7期45卷 180-185页

作者：何润泽朱禧月程昱广东工业大学信息工程学院广州510006

光信噪比(OSNR)与光纤通信的传输性能息息相关,因此,OSNR监测是光性能监测技术中至关重要的一环,同时,传输链路中的色散会导致光信号脉冲展宽,使OSNR监测准确性下降。针对这一问题,设计了一种卷积神经网络模型,以异步延迟采样图(ADTP)... 详细信息

光信噪比(OSNR)与光纤通信的传输性能息息相关,因此,OSNR监测是光性能监测技术中至关重要的一环,同时,传输链路中的色散会导致光信号脉冲展宽,使OSNR监测准确性下降。针对这一问题,设计了一种卷积神经网络模型,以异步延迟采样图(ADTP)作为网络输入特征,引入实例批量标准化模块,继承了神经网络不同深度下特征发散分布的优点,提高了神经网络对色散变化的适应性。实验结果表明,在10 Gb/s NRZ-OOK信号无色散干扰监测场景下,该模型的平均绝对误差(MAE)为0.2 dB,在色散变化的场景下,MAE最高降低了0.61 dB。

关键词：光信噪比色散干扰卷积神经网络实例批标准化鲁棒性

Compressive surface strained atomic-layer Cu2O on Cu@Ag nanoparticles

在线全文

学校读者我要写书评

暂无评论

Nano Research 2019年第5期12卷 1187-1192页

作者： xiyue zhu Hongpan Rong Xiaobin Zhang Qiumei Di Huishan Shang Bing Bai Jiajia Liu Jia Liu Meng Xu Wenxing Chen Jiatao Zhang Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications Experimental Center of Advanced MaterialsSchool of Materials Science & EngineeringBeijing Institute of TechnologyBeijing 100081China Center for Nano Materials and Technology Japan Advanced Institute of Science and Technology1-1 AsahidaiNomiIshikawa 923-1292Japan

Control of surface structure at the atomic level can effectively tune catalytic properties of *** surface strain is an effective strategy for enhancing catalytic activity;however,the correlation studies between the surface strain with catalytic performance are scant because such mechanistic studies require the precise control of surface strain on *** this work,a simple strategy of precisely tuning compressive surface strain of atomic-layer Cu2O on Cu@Ag (AL-Cu2O/Cu@Ag) nanoparticles (NPs) is *** AL-Cu2O is synthesized by structure evolution of Cu@Ag core-shell nanoparticles,and the precise thickness-control of AL-Cu2O is achieved by tuning the molar ratio of Cu/Ag of the starting ***-corrected high-resolution transmission electron microscopy (AC-HRTEM) and EELS elemental mapping characterization showed that the compressive surface strain of AL-Cu2O along the [111] and [200] directions can be precisely tuned from 6.5% to 1.6% and 6.6% to 4.7%,respectively,by changing the number of AL-Cu2O layer from 3 to *** as-prepared AL-Cu2O/Cu@Ag NPs exhibited excellent catalytic property in the synthesis of azobenzene from aniline,in which the strained 4-layers Cu2O (4.5% along the [111] direction,6.1% along the [200] direction) exhibits the best catalytic *** work may be beneficial for the design and surface engineering of catalysts toward specific applications.

关键词： compressive surface strain atomic-layer Cu2O precise thickness-control catalytic activity

Biomaterials and tissue engineering in traumatic brain injury:novel perspectives on promoting neural regeneration

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第10期19卷 2157-2174页

作者： Shihong zhu Xiaoyin Liu xiyue Lu Qiang Liao Huiyang Luo Yuan Tian Xu Cheng Yaxin Jiang Guangdi Liu Jing Chen Department of Neurosurgery West China HospitalWest China Medical SchoolSichuan UniversityChengduSichuan ProvinceChina National Engineering Research Center for Biomaterials College of Biomedical EngineeringSichuan UniversityChengduSichuan ProvinceChina Department of Anesthesiology West China HospitalWest China Medical SchoolSichuan UniversityChengduSichuan ProvinceChina Department of Pharmacy West China HospitalWest China Medical SchoolSichuan UniversityChengduSichuan ProvinceChina Out-patient Department West China HospitalWest China Medical SchoolSichuan UniversityChengduSichuan ProvinceChina Department of Respiratory and Critical Care Medicine West China HospitalWest China Medical SchoolSichuan UniversityChengduSichuan ProvinceChina

Traumatic brain injury is a serious medical condition that can be attributed to falls, motor vehicle accidents, sports injuries and acts of violence, causing a series of neural injuries and neuropsychiatric symptoms. However, limited accessibility to the injury sites, complicated histological and anatomical structure, intricate cellular and extracellular milieu, lack of regenerative capacity in the native cells, vast variety of damage routes, and the insufficient time available for treatment have restricted the widespread application of several therapeutic methods in cases of central nervous system injury. Tissue engineering and regenerative medicine have emerged as innovative approaches in the field of nerve regeneration. By combining biomaterials, stem cells, and growth factors, these approaches have provided a platform for developing effective treatments for neural injuries, which can offer the potential to restore neural function, improve patient outcomes, and reduce the need for drugs and invasive surgical procedures. Biomaterials have shown advantages in promoting neural development, inhibiting glial scar formation, and providing a suitable biomimetic neural microenvironment, which makes their application promising in the field of neural regeneration. For instance, bioactive scaffolds loaded with stem cells can provide a biocompatible and biodegradable milieu. Furthermore, stem cells-derived exosomes combine the advantages of stem cells, avoid the risk of immune rejection, cooperate with biomaterials to enhance their biological functions, and exert stable functions, thereby inducing angiogenesis and neural regeneration in patients with traumatic brain injury and promoting the recovery of brain function. Unfortunately, biomaterials have shown positive effects in the laboratory, but when similar materials are used in clinical studies of human central nervous system regeneration, their efficacy is unsatisfactory. Here, we review the characteristics and properties

关键词： bioactive materials biomaterials exosomes neural regeneration scaffolds stem cells tissue engineering traumatic brain injury

妇科恶性肿瘤患者TC方案化疗后发生重度骨髓抑制的影响因素

在线全文

学校读者我要写书评

暂无评论

郑州大学学报（医学版） 2016年第5期51卷 657-660页

作者：徐西岳朱新群刘小静郑州大学第二附属医院妇产科郑州450014

目的：研究紫杉醇＋奈达铂（TC）方案化疗后3～4 d出现重度骨髓抑制的影响因素。方法：接受TC化疗的妇科恶性肿瘤患者118例,化疗后出现0、Ⅰ度骨髓抑制者58例（轻度组）,Ⅱ、Ⅲ、Ⅳ度骨髓抑制者60例（重度组）,采用单因素分析探讨年龄... 详细信息

目的：研究紫杉醇＋奈达铂（TC）方案化疗后3～4 d出现重度骨髓抑制的影响因素。方法：接受TC化疗的妇科恶性肿瘤患者118例,化疗后出现0、Ⅰ度骨髓抑制者58例（轻度组）,Ⅱ、Ⅲ、Ⅳ度骨髓抑制者60例（重度组）,采用单因素分析探讨年龄、体重指数、体表面积、有无内科并发症、肿瘤分期、化疗疗程、肿瘤类型等因素与重度骨髓抑制发生的关系,采用logistic回归分析探讨化疗后出现重度骨髓抑制的影响因素。结果：单因素分析结果表明年龄、肿瘤类型、肿瘤分期、化疗疗程与重度骨髓抑制有关（P＜0.05）。Logistic回归分析表明宫颈癌、肿瘤分期、化疗疗程是重度骨髓抑制的影响因素（OR=0.046、2.357、3.121,P＜0.05）。结论：肿瘤分期晚、化疗次数多是妇科恶性肿瘤患者TC方案化疗后发生重度骨髓抑制的高风险因素; 宫颈癌患者发生重度骨髓抑制的风险低于卵巢癌患者。

关键词：妇科恶性肿瘤紫杉醇奈达铂化疗重度骨髓抑制

在线全文

学校读者我要写书评

暂无评论

《本草纲目》中的竹类药物研究

世界竹藤通讯 2013年第4期11卷 24-27页

作者：朱勇田晓凤朱溪悦福建省尤溪县林业局尤溪365100 中国海洋大学青岛266003

通过检索、归纳,研究了《本草纲目》中竹类及其相关产品的药物记载。结果显示:相关药物的记录共46条,其中第三十七卷"木部"最多,共有19条占41.3%,其次是三十八卷的"服器部"共14条占30.4%。以竹类各器官进行分类,秆的条目最多,共30条占65... 详细信息

通过检索、归纳,研究了《本草纲目》中竹类及其相关产品的药物记载。结果显示:相关药物的记录共46条,其中第三十七卷"木部"最多,共有19条占41.3%,其次是三十八卷的"服器部"共14条占30.4%。以竹类各器官进行分类,秆的条目最多,共30条占65.2%,其次是竹类的延伸产品6条占13.0%。竹类相关药物的利用方式主要为食用,共35条占76.1%。较大比例的竹类药物用于治疗老热、止渴、止咳、风热等病症。部分药物的药性可能缺乏科学依据。

关键词：本草纲目竹类药物

在线全文

学校读者我要写书评

暂无评论

棉花地膜覆盖栽培适宜播种期的研究

河南农业大学学报 1985年第2期 96-108页

作者：唐予迪朱禧月河南农业大学农学系河南农业大学农学系

不同播期对棉花出苗早晚、苗病和生长发育均有不同的影响。在一定播期范围内,播种早晚主要影响出苗和苗期的长短,对现蕾以后的生育进程作用较小。而播种过早,苗病重,生育慢,不利于全苗壮苗,易形成老苗、出现后期早衰;过晚播种,就降低了... 详细信息

不同播期对棉花出苗早晚、苗病和生长发育均有不同的影响。在一定播期范围内,播种早晚主要影响出苗和苗期的长短,对现蕾以后的生育进程作用较小。而播种过早,苗病重,生育慢,不利于全苗壮苗,易形成老苗、出现后期早衰;过晚播种,就降低了地膜覆盖的效用。温度是决定播期的主要条件,统计分析表明,膜内外5厘米地温存在着高度的相关性,据此推算,当露地5厘米地温稳定通过11℃时,膜下5厘米地温可达13—14℃,已能满足棉种发芽出苗的要求,可视为棉花地膜覆盖播种适期的温度指标。综合考虑以上因素,结合我省气侯特点,提出棉花地膜覆盖适宜播种期范围为4月5日—15日,一般比露地直播提早5—10天播种为宜。

关键词：适宜播种期地膜覆盖栽培播期后期早衰棉种苗病露地直播晚播生育进程壮苗早发