检索结果-内蒙古大学图书馆

Epitaxial Growth and Characteristics of Nonpolar a-Plane InGaN Films with Blue-Green-Red Emission and Entire In Content Range

引用

Chinese Physics Letters 2022年第4期39卷 83-87页

作者： Jianguo Zhao Kai Chen Maogao Gong Wenxiao Hu Bin Liu Tao Tao Yu Yan Zili Xie Yuanyuan Li Jianhua Chang Xiaoxuan Wang Qiannan Cui Chunxiang Xu Rong Zhang Youdou Zheng Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China School of Electronics and Information Engineering Nanjing University of Information Science and TechnologyNanjing 210044China Xiamen University Xiamen 361000China State Key Laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096China

Nonpolar(1120)plane In_(x)Ga_(1-x)N epilayers comprising the entire In content(x)range were successfully grown on nanoscale Ga N islands by metal-organic chemical vapor *** structural and optical properties were studied *** was found that the surface morphology was gradually smoothed when x increased from 0.06 to 0.33,even though the crystalline quality was gradually declined,which was accompanied by the appearance of phase separation in the In_(x)Ga_(1-x)N *** wavelengths of 478 and 674 nm for blue and red light were achieved for x varied from 0.06 to ***,the corresponding average lifetime(τ_(1/e))of carriers for the nonpolar In Ga N film was decreased from 406 ps to 267 ps,indicating that a high-speed modulation bandwidth can be expected for nonpolar In Ga N-based light-emitting ***,the bowing coefficient(b)of the(1120)plane In Ga N was determined to be 1.91 e V for the bandgap energy as a function of x.

关键词： polar lifetime separation

来源：评论

学校读者我要写书评

暂无评论

镧-钛氧簇闪烁体中无机簇核和有机配体的协同作用实现高性能X射线成像

引用

Science China Materials 2024年第8期67卷 2575-2582页

作者：李茹画桑天天曹钱刘娟倪京飞王超刘淑娟刘湘梅赵强 State Key Laboratory of Organic Electronics and Information Displays&Jiangsu Key Laboratory of Smart Biomaterials and Theranostic Technology Institute of Advanced MaterialsNanjing University of Posts and TelecommunicationsNanjing 210023China College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&TelecommunicationsNanjing 210023China Shanxi Open University Taiyuan 030027China

随着对X射线成像,特别是对弯曲和不规则物体的三维成像的需求不断增加,高性能柔性闪烁膜的开发引起了人们的极大关注.镧系(Ⅲ)-有机闪烁体由于其在结构设计和光学可调谐方面的巨大灵活性,最近成为一类新的有前途的X射线闪烁体.然而,设... 详细信息

随着对X射线成像,特别是对弯曲和不规则物体的三维成像的需求不断增加,高性能柔性闪烁膜的开发引起了人们的极大关注.镧系(Ⅲ)-有机闪烁体由于其在结构设计和光学可调谐方面的巨大灵活性,最近成为一类新的有前途的X射线闪烁体.然而,设计具有高光产额和良好溶液分散性的镧系元素(Ⅲ)-有机闪烁体仍然具有挑战性.本文报道了一种具有高效X射线激发发光(XEL)和良好溶液分散性的铕-钛氧簇合物(Eu-TiOCs)闪烁体.笼状镧-钛氧原子簇核作为X射线吸收剂,产生高能电子并引发二次电子热弛豫.有机配体作为能量转移桥和天线,通过级联能量转移来敏化Ln^(3+);离子的发光.Eu-TiOCs闪烁体表现出高的稳态X射线光产额(高达26,816±2000 photons MeV^(-1)).此外,EuTiOCs闪烁体和聚合物的羟基之间的弱氢键相互作用增强了Eu-TiOCs的溶液分散性,有利于制备低光散射和均匀闪烁膜.铕-钛氧簇与聚合物之间的通过无机簇笼和有机配体之间的协同作用,所得到的柔性闪烁膜对平面和非平面物体都表现出的高空间分辨率和低剂量X射线成像.本工作为进一步设计和制备高性能X射线闪烁体和高分辨率柔性闪烁膜提供了新思路.

关键词： X射线成像不规则物体有机配体能量转移二次电子闪烁体高能电子热弛豫

来源：评论

学校读者我要写书评

暂无评论

Deciphering the contributions of spectral and structural data to wheat yield estimation from proximal sensing

引用

The Crop Journal 2022年第5期10卷 1334-1345页

作者： Qing Li Shichao Jin Jingrong Zang Xiao Wang Zhuangzhuang Sun Ziyu Li Shan Xu Qin Ma Yanjun Su Qinghua Guo Dong Jiang Plant Phenomics Research Centre Academy for Advanced Interdisciplinary StudiesRegional Technique Innovation Center for Wheat ProductionMinistry of AgricultureKey Laboratory of Crop Physiology and Ecology in Southern ChinaMinistry of AgricultureCollaborative Innovation Centre for Modern Crop Production co-sponsored by Province and MinistryJiangsu Key Laboratory for Information AgricultureNanjing Agricultural UniversityNanjing 210095JiangsuChina Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology International Institute for Earth System SciencesNanjing UniversityNanjing 210023JiangsuChina Department of Forestry Mississippi State UniversityMississippi StateMS 39759USA State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China Department of Ecology College of Environmental Sciencesand Key Laboratory of Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China

Accurate, efficient, and timely yield estimation is critical for crop variety breeding and management optimization. However, the contributions of proximal sensing data characteristics(spectral, temporal, and spatial) to yield estimation have not been systematically evaluated. We collected long-term, hypertemporal, and large-volume light detection and ranging(Li DAR) and multispectral data to(i) identify the best machine learning method and prediction stage for wheat yield estimation,(ii) characterize the contribution of multisource data fusion and the dynamic importance of structural and spectral traits to yield estimation, and(iii) elucidate the contribution of time-series data fusion and 3 D spatial information to yield estimation. Wheat yield could be accurately(R^(2)= 0.891) and timely(approximately-two months before harvest) estimated from fused Li DAR and multispectral data. The artificial neural network model and the flowering stage were always the best method and prediction stage, respectively. Spectral traits(such as CIgreen) dominated yield estimation, especially in the early stage, whereas the contribution of structural traits(such as height) was more stable in the late stage. Fusing spectral and structural traits increased estimation accuracy at all growth stages. Better yield estimation was realized from traits derived from complete 3 D points than from canopy surface points and from integrated multi-stage(especially from jointing to heading and flowering stages) data than from single-stage data. We suggest that this study offers a novel perspective on deciphering the contributions of spectral, structural, and timeseries information to wheat yield estimation and can guide accurate, efficient, and timely estimation of wheat yield.

关键词： LiDAR Multispectral Yield Phenotype Hyper-temporal

来源：评论

学校读者我要写书评

暂无评论

The 10^(th)macrocylic arene supramolecular chemistry symposium

引用

Chinese Chemical Letters 2023年第12期34卷 1-3页

作者： Shuquan Zhang Meijin Lin Andrew C.H.Sue Liping Cao Feng Wang Cheng Yang Tao Tu Feihe Huang Leyong Wang Key Laboratory of Molecule Synthesis and Function Discovery and Fujian Provincial Key Laboratory of Advanced Inorganic Oxygenated MaterialsCollege of ChemistryFuzhou UniversityFuzhou 350116China College of Zhicheng Fuzhou UniversityFuzhou 350002China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China College of Chemistry and Materials Science Northwest UniversityXi'an 710069China CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Department of ChemistryFudan UniversityShanghai 200438China Stoddart Institute of Molecular Science Department of ChemistryZhejiang UniversityHangzhou 310058China Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

In the last few decades,there has been a rapid emergence and growing interest in synthetic macrocyclic arenes,such as calixarenes[1,2],cyclophanes[3],cyclotriveratrylenes[4],pillararenes[5-7],and other novel macrocyclic arenes[8-10].These molecules have garnered significant attention in supramolecular chemistry for their fascinating structures,intrinsic cavities,ease of structural and property modifications and wide range of applications[11-14].

关键词： chemistry macrocyclic property

来源：评论

学校读者我要写书评

暂无评论

Pressure-induced magnetic phase and structural transition in SmSb_(2)

引用

Chinese Physics B 2024年第6期33卷 473-478页

作者：李涛王舒阳陈绪亮陈春华房勇杨昭荣 Science Island Branch of Graduate School University of Science and Technology of ChinaHefei 230026China Anhui Key Laboratory of Low-Energy Quantum Materials and Devices High Magnetic Field LaboratoryHFIPSChinese Academy of SciencesHefei 230031China Jiangsu Laboratory of Advanced Functional Materials Department of PhysicsChangshu Institute of TechnologyChangshu 215500China Institutes of Physical Science and Information Technology Anhui UniversityHefei 230601China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China

Motivated by the recent discovery of unconventional superconductivity around a magnetic quantum critical point in pressurized CeSb_(2),here we present a high-pressure study of an isostructural antiferromagnetic(AFM) SmSb_(2) through electrical transport and synchrotron x-ray diffraction *** P_(C)~2.5 GPa,we found a pressure-induced magnetic phase transition accompanied by a Cmca→P4/nmm structural phase *** the pristine AFM phase below P_(C),the AFM transition temperature of SmSb_(2) is insensitive to pressure;in the emergent magnetic phase above P_(C),however,the magnetic critical temperature increases rapidly with increasing *** addition,at ambient pressure,the magnetoresistivity(MR) of SmSb_(2) increases suddenly upon cooling below the AFM transition temperature and presents linear nonsaturating behavior under high field at 2 *** increasing pressure above P_(C),the MR behavior remains similar to that observed at ambient pressure,both in terms of temperature-and field-dependent *** leads us to argue an AFM-like state for SmSb_(2) above P_(C).Within the investigated pressure of up to 45.3 GPa and the temperature of down to 1.8 K,we found no signature of superconductivity in SmSb_(2).

关键词： high pressure antiferromagnet magnetoresistivity structural transition

来源：评论

学校读者我要写书评

暂无评论

On Networked Dynamical Systems with Heterogeneous Constraints:Equilibrium Points and Stability 41

On Networked Dynamical Systems with Heterogeneous Constraint...

引用

第41届中国控制会议

作者： Qichao Ma Jiahu Qin Yu Kang Huijun Gao Department of Automation University of Science and Technology of China Institute of Artificial Intelligence Hefei Comprehensive National Science Center Institute of Advanced Technology University of Science and Technology of China Research Institute of Intelligent Control and Systems and the State Key Laboratory of Robotics and System Harbin Institute of Technology

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

In this paper,we investigate multi-agent systems with heterogeneous constraints,which can represent the heuristic beliefs of the agents towards an issue or the physical constraints of the *** typical example is a group of interacting unmanned aerial vehicles in a complex environment with multiple physical *** a result of the heterogeneity of the constraints,an equilibrium point may not exist and is presumably to be a dissensus point when it *** investigate the existence of equilibrium points from the perspective of Kakutani's fixed point theory for a set-valued *** also prove the local/global stability of certain equilibrium ***,a special case that the constraints are homogeneous is taken into *** constrains are assumed to take interval forms with nonempty *** is proved that consensus can be achieved globally and asymptotically for this *** examples are designed to illustrate our theoretical findings.

关键词： Multi-agent systems heterogeneous constraints equilibrium point and its stability constrained consensus

来源：评论

学校读者我要写书评

暂无评论

Hydrogel-elastomer-based stretchable strain sensor fabricated by a simple projection lithography method

引用

International Journal of Smart and Nano Materials 2021年第3期12卷 256-268页

作者： Zhenqing Li Xiangnan He Jianxiang Cheng Honggeng Li Yuan-Fang Zhang Xiaojuan Shi Kai Yu Hui Ying Yang Qi Ge Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems Department of Mechanical and Energy EngineeringSouthern University of Science and TechnologyShenzhenChina Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities Southern University of Science and TechnologyShenzhenChina Digital Manufacturing and Design Centre Singapore University of Technology and DesignSingapore Department of Mechanical Engineering University of Colorado DenverDenverCOUSA National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbinP.R.China

Stretchable strain sensor detects a wide range of strain variation and is therefore a key component in various *** traditional ones made of elastomers doped with conductive components or fabricated with liquid conductors,ionically conductive hydrogel-based strain sensors remain conductive under large deformations and are ***,dehydration is a challenging issue for the *** have developed hydrogel-elastomer-based strain sensors where an elastomer matrix encapsulates a hydrogel circuit to prevent its ***,the reported multistep approaches are generally *** group recently reported a multimaterial 3D printing approach that enables fast fabrication of such sensors,yet requires a self-built digital-light-processing-based multimaterial 3D ***,we report a simple projection lithography method to fabricate hydrogel-elastomer-based stretchable strain sensors within 5 *** method only requires a UV projector/lamp with photomasks;the chemicals are commercially available;the protocols for preparing the polymer precursors are friendly to users without chemistry ***,the manufacturing flexibility allows users to readily pattern the sensor circuit and attach the sensor to a 3D printed soft pneumatic actuator to enable strain sensing on the *** proposed approach paves a simple and versatile way to fabricate hydrogel-elastomer-based stretchable strain sensors and flexible electronic devices.

关键词： Ionically conductive hydrogel stretchable strain sensor projection lithography

来源：评论

学校读者我要写书评

暂无评论

Structural and functional design of geopolymer adsorbents:a review

引用

Tungsten 2024年第1期6卷 48-76页

作者： Hai-Ze Jin Chen-Xi Qiu Yan-Song Li Bao Liu Jun-Yi Liu Qiao Chen Xue-Feng Lu Cui-Xia Li Qi-Kun Wang School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Lanzhou 730050China Shenyang Nonferrous Metals Research Institute Co. LTDShenyang 110000China Automotive Engineering Research Institute Jiangsu UniversityZhenjiang 212013China School of Materials Science and Engineering Jingdezhen Ceramic UniversityJingdezhen 333403China

The water pollution derived from the discharge of heavy metals,antibiotics,dyes and surfactants wastewater,*** seriously affected human survival and ecological *** an efficient and low-cost physical wastewater treatment process,the adsorption is a continuous hot spot in related scientific research and *** are non-crystal or semi-crystalline materials with high-efficiency adsorption performance due to the alkali metal ions that balance the electronegative aluminosilicate skeleton can be efficiently replaced by other cations in the aqueous *** related studies of different application conditions,service objects and morphological differences of geopolymer adsorbents based on structure-function design have been in-depth exploration and *** review aims to summarize the research progres s of the structure-function design based on the geopolymerization mechanism and kinetics and service *** overview of service characteristics and progress of geopolymers in the wastewater treatment field(e.g.,dyes,heavy metals,radionuclides,surfactants,antibiotics,ammonium,phosphorus,nitrogen and CO_(2),etc.)are systematically *** the evolution and development of morphological differences and the relationship of structure-function design of geopolymer adsorbents were compared and ***,the challenge worth overcoming,the trends worth considering and perspectives worth developing are highlighted.

关键词： Geopolymer Wastewater Adsorption Structure-function design Application

来源：评论

学校读者我要写书评

暂无评论

超亲水纳孔分离膜的制备及其分子分离性能和稳定性研究

引用

Science China Materials 2024年第8期67卷 2477-2485页

作者：赵璐张丰高守建靳健 College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Suzhou Nano Science and TechnologySuzhou Key Laboratory of Macromolecular Design and Precision SynthesisJiangsu Key Laboratory of Advanced Negative Carbon TechnologiesSoochow UniversitySuzhou 215123China i-Lab CAS Key Laboratory of Nano-Bio InterfaceSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China

膜分离技术在有机分子污水的处理中具有广泛应用,其面临的难题之一是制备具有超亲水性质的纳孔膜以抵御有机污染物的污染,实现高效、稳定的分子分离.在本文中,我们通过全膜交联的方法在保持水凝胶纳孔膜超亲水性质的前提下大幅提升了其... 详细信息

膜分离技术在有机分子污水的处理中具有广泛应用,其面临的难题之一是制备具有超亲水性质的纳孔膜以抵御有机污染物的污染,实现高效、稳定的分子分离.在本文中,我们通过全膜交联的方法在保持水凝胶纳孔膜超亲水性质的前提下大幅提升了其机械强度,制备了高强度超亲水纳孔膜.该膜实现了有机分子的高效分离,水通量达到220 L m^(-2)h^(-1)bar^(-1),考马斯亮蓝(CBB)截留率达到~99.9%,分子/盐(CBB/Na_(2)SO_(4))选择性达到747.在以腐殖酸为污染物的分子分离中,该膜表现出优异的抗污染性能,通量恢复率接近100%.该膜还具有出色的抗压性能,在高达8 bar的跨膜压力下保持了稳定的分子分离性能.本工作为制备超亲水纳孔膜实现有机分子废水的高效分离提供了一种新的思路.

关键词：超亲水跨膜压力抗污染性能分离性能膜分离技术高效分离抗压性能孔膜

来源：评论

学校读者我要写书评

暂无评论

PONizing Wi-Fi for Fiber-to-The-Room Scenario: A Unified PON and Wi-Fi Access Based on PON MAC Protocol

PONizing Wi-Fi for Fiber-to-The-Room Scenario: A Unified PON...

引用

2023 Opto-Electronics and Communications Conference, OECC 2023

作者： Shen, Gangxiang Li, Jun Chen, Yuxuan Cai, Jinhan Chang, Tianhai School of Electronic and Information Engineering Jiangsu Engineering Research Center of Novel Optical Fiber Technology and Communication Network Suzhou Key Laboratory of Advanced Optical Communication Network Technology Suzhou China Huawei Technologies Co. Ltd. Shenzhen China

ISBN: (纸本)9781665462136

We propose a unified PON and Wi-Fi access scheme tailored for the fiber-to-the-room scenario, in which WiFi access is PONized based on the PON protocol. The proposed scheme can significantly improve network access rate, resource utilization, and handover time, compared with a benchmark based on non-integrated PON and Wi-Fi access. © 2023 IEEE.

关键词： Wi-Fi

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：