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Improvement of a MIMO antenna structure with combination of transmit beamforming and spatial multiplexing

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The Journal of China Universities of Posts and Telecommunications 2008年第1期15卷 91-95页

作者： YUAN ting-ting ZHANG lei YANG Hong-wen YANG Da-cheng School of Telecommunication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

Downlinks of the cellular systems generally have more transmit antennas than receive antennas. To efficiently exploit all antenna resources, a technique that combines the advantage of beamforming and spatial multiplexing has been proposed, which partitions the transmit antennas into neighboring sub-groups. In this article, this technique is further improved by Eq. （1） allowing non-contiguous antenna grouping, and Eq. （2） adopting two new grouping criteria： minimum signal distance maximization （MSDM） criterion and maximum correlation coefficient minimization （MCCM） criterion. Simulation results indicate that these improvements can bring noticeable gains in the Rayleigh fiat fading channel environment.

关键词： multiple-input multiple-output (MIMO) beamforming antenna grouping uncorrelated channel semi-correlated channel

Multiple mediation effects of health locusof control and hope on the relationshipbetween stroke patients’ social supportand self-management

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Frontiers of Nursing 2020年第1期7卷 49-57页

作者： ting-ting lei Hong-Mei Han Xiao-Jing Liu School of Nursing Tianjin University of Traditional Chinese MedicineTianjin 301617China School of Nursing The First Affiliated Hospital of Tianjin University of Traditional Chinese MedicineTianjin 300382China

Objective:This study aimed to identify the mediation effects of health locus of control(HLC)and hope between stroke patients’social support and ***:A cross-sectional study was conducted.A total of 300 Chinese stroke patients were recruited by convenient sampling from the acupuncture department of two Chinese Traditional Medical Hospitals in Tianjin Province from June to September *** self-report questionnaires include Social Support Assessment Scale,Herth Hope Index,Mental Health Locus of Control Scale,Stroke Self-management Behavior Scale,and personal information *** the survey data were entered in Excel and analyzed using the SPSS 24.0 *** was tested with Bootstrapping in AMOS 23.0 ***:The result showed that internal health locus of control(IHLC),chance health locus of control(CHLC)and hope were the mediators between social support and *** direct,indirect,and total effects of social support on self-management behavior were 0.306 (P<0.01),0.109(P<0.01),and 0.415(P<0.01),***:Social support can directly influence self-management,and it can also indirectly influence self-management through IHLC,CHLC,and hope.

关键词： social support health locus of control hope self-management multiple mediation effects

Direct Photolithography of WO_(x)Nanoparticles for High‑Resolution Non‑Emissive Displays

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Nano-Micro Letters 2025年第3期17卷 297-309页

作者： Chang Gu Guojian Yang Wenxuan Wang Aiyan Shi Wenjuan Fang lei Qian Xiaofei Hu ting Zhang Chaoyu Xiang Yu‑Mo Zhang Laboratory of Optoelectronic Information Technology and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Hangzhou Bay Laboratory of Advanced Nano‑Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315336People’s Republic of China Smart Materials for Architecture Research Lab Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China State Key Lab of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012People’s Republic of China

High-resolution non-emissive displays based on electrochromic tungsten oxides(WOx)are crucial for future near-eye virtual/augmented reality interactions,given their impressive attributes such as high environmental stability,ideal outdoor readability,and low energy ***,the limited intrinsic structure of inorganic materials has presented a significant challenge in achieving precise patterning/pixelation at the micron ***,we successfully developed the direct photolithography for WOx nanoparticles based on in situ photo-induced ligand *** strategy enabled us to achieve ultra-high resolution efficiently(line widthting device exhibited impressive electrochromic performance,such as fast response(3600 cycles),as well as promising applications in electronic logos,pixelated displays,flexible electronics,*** success and advancements presented here are expected to inspire and accelerate research and development(R&D)in high-resolution non-emissive displays and other ultra-fine micro-electronics.

关键词： Electrochromic Direct photolithography WOx nanoparticles In situ photo-induced ligand exchange High-resolution displays

2001—2017年我国部分地区蔬菜中砷和重金属累积特征及膳食暴露风险

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中国食品卫生杂志 2018年第2期30卷 187-193页

作者：程家丽任硕刘婷婷王同蕾中国疾病预防控制中心营养与健康所卫计委微量元素重点实验室北京100050

目的探讨我国部分地区蔬菜中砷和重金属的累积特征,并分析潜在膳食暴露风险。方法搜索论文数据库,收集2001—2017年发表文献中蔬菜铜(Cu)、铅(Pb)、镉(Cd)、铬(Cr)、砷(As)及汞(Hg)含量的数据,分析我国根茎类、叶菜类及茄果类蔬菜中As... 详细信息

目的探讨我国部分地区蔬菜中砷和重金属的累积特征,并分析潜在膳食暴露风险。方法搜索论文数据库,收集2001—2017年发表文献中蔬菜铜(Cu)、铅(Pb)、镉(Cd)、铬(Cr)、砷(As)及汞(Hg)含量的数据,分析我国根茎类、叶菜类及茄果类蔬菜中As和重金属的污染特性,并采用美国环保署推荐的健康风险评价模型评估蔬菜中砷和重金属的膳食暴露风险。结果 3类蔬菜中Cu、Pb、Cd、Cr、As和Hg均呈非正态分布,变异系数均0.05)。根茎类蔬菜中Pb、As和Hg的含量较高,叶菜类蔬菜中Cd含量较高。根茎类和叶菜类蔬菜中Pb-Cd及根茎类蔬菜中Pb-Cr相关性均较强(P<0.01)。3类蔬菜中Cu、Cd、Cr和As污染指数均在安全范围内,而根茎类和叶菜类蔬菜中的Pb和Hg均存在不同程度的污染,但基本属于轻度污染。根茎类和茄果类数值中As和重金属对成人和儿童的风险值均<1.0,但叶菜类蔬菜中Pb对成人和儿童的风险值的第95百分位数分别是1.780和2.020,表明叶菜类蔬菜中的Pb存在潜在的人体非致癌风险。结论中国蔬菜中Cu、Cd、Cr、As和Hg整体污染较轻,但叶菜类蔬菜中Pb污染应引起重视。

关键词：蔬菜砷重金属累积食品污染物膳食暴露风险评估

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花卉形态仿生在礼服造型设计中的运用

艺术与设计（理论版） 2016年第9期 84-86页

作者：沈婷婷吴星蕾浙江理工大学杭州310018

自然元素作为服装仿生设计的灵感源之一,赋予服装生命力,提升其审美价值。文章以花卉仿生为对象,通过形态仿生的实例分析建立方法构架。以花卉的轮廓造型、比例线条、质感肌理等作为借鉴模仿对象,将元素提取后以具象或抽象仿生的方法运... 详细信息

自然元素作为服装仿生设计的灵感源之一,赋予服装生命力,提升其审美价值。文章以花卉仿生为对象,通过形态仿生的实例分析建立方法构架。以花卉的轮廓造型、比例线条、质感肌理等作为借鉴模仿对象,将元素提取后以具象或抽象仿生的方法运用到礼服设计中,设计制作出造型优美富有创意的礼服。

关键词：服装设计花卉仿生造型设计

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数字现金系统发展问题研究

计算机科学 2004年第3期31卷 67-68,79页

作者：肖迪高婷婷王磊廖晓峰重庆大学计算机学院

本文介绍了数字现金的关键技术、研究现状和应用现状,并指出了数字现金未来的发展方向。

关键词：电子商务电子支付方式数字现金系统数字签名

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奶牛乳房炎抗性育种相关性状研究

中国奶牛 2016年第12期 9-12页

作者：徐婷婷刘光磊上海奶牛育种中心有限公司上海200436 上海光明荷斯坦牧业有限公司上海200436

多年来,产奶量作为育种的重要经济性状,在多个国家的不同育种体系中占据重要比重,而乳房炎作为影响奶业经济发展的重要疾病之一,仅在北欧部分国家(丹麦、芬兰、挪威以及瑞典)被纳入育种体系。近年来,随着抗病育种的深入研究,奶牛乳房炎... 详细信息

多年来,产奶量作为育种的重要经济性状,在多个国家的不同育种体系中占据重要比重,而乳房炎作为影响奶业经济发展的重要疾病之一,仅在北欧部分国家(丹麦、芬兰、挪威以及瑞典)被纳入育种体系。近年来,随着抗病育种的深入研究,奶牛乳房炎抗性育种的研究步伐也不断加快。本文主要从与乳房炎抗性相关的一些间接指标性状和免疫学角度对乳房炎抗性育种进行了阐释。

关键词：乳房炎抗性育种 SCC 乳房炎抗性相关基因中红外(MIR)光谱测定技术

大口黑鲈溃疡综合征病毒MCP基因的原核表达及重组蛋白的免疫效果初步分析

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生物技术通报 2016年第8期32卷 139-144页

作者：马冬梅邓国成白俊杰江小燕曹婷婷蔡磊中国水产科学研究院珠江水产研究所农业部热带亚热带鱼类选育与养殖重点开放实验室广州510380 淡水水产健康养殖湖北省协同创新中心武汉430070

为了预防近年来流行于广东省养殖大口黑鲈(Micropterus salmoides)中的病毒性溃疡综合征,以大口黑鲈溃疡综合征病毒(Largemouth bass ulcerative syndrome virus,以下简称LBUSV)的主要衣壳蛋白(MCP)作为目标抗原蛋白,将MCP基因开放阅读... 详细信息

为了预防近年来流行于广东省养殖大口黑鲈(Micropterus salmoides)中的病毒性溃疡综合征,以大口黑鲈溃疡综合征病毒(Largemouth bass ulcerative syndrome virus,以下简称LBUSV)的主要衣壳蛋白(MCP)作为目标抗原蛋白,将MCP基因开放阅读框插入到pBV220载体中,转化大肠杆菌DH5α,构建重组表达MCP蛋白的工程菌。重组菌经过42℃温度诱导和SDSPAGE电泳,检测到在分子量51 k D处有一条特异表达蛋白带,重组蛋白约占重组菌体总蛋白的30%。重组MCP蛋白经洗涤、纯化、溶解、复性和透析后纯度达90%以上。将纯化后的重组蛋白与不完全弗氏佐剂混合、乳化后,免疫大口黑鲈,然后进行感染实验,感染后20 d疫苗保护率最高达67.7%。结果表明,该病毒MCP蛋白具有一定的免疫原性,可以作为制作重组疫苗的候选蛋白。

关键词：大口黑鲈溃疡综合征病毒主要衣壳蛋白原核表达免疫效果

Attention Eraser and Quantitative Measures for Automated Bone Age Assessment

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Computers, Materials & Continua 2025年第1期82卷 627-644页

作者： Liuqiang Shu lei Yu College of Computer and Information Science Chongqing Normal UniversityChongqing401331China

Bone age assessment(BAA)aims to determine whether a child’s growth and development are normal concerning their chronological *** predict bone age more accurately based on radiographs,and for the left-hand X-ray images of different races model can have better adaptability,we propose a neural network in parallel with the quantitative features from the left-hand bone measurements for *** this study,a lightweight feature extractor(LFE)is designed to obtain the featuremaps fromradiographs,and amodule called attention erasermodule(AEM)is proposed to capture the fine-grained ***,the dimensional information of the metacarpal parts in the radiographs is measured to enhance the model’s generalization capability across images fromdifferent *** is trained and validated on the RSNA,RHPE,and digital hand atlas datasets,which include images from various racial *** model achieves a mean absolute error(MAE)of 4.42 months on the RSNA dataset and 15.98 months on the RHPE *** to ResNet50,InceptionV3,and several state-of-the-art methods,our proposed method shows statistically significant improvements(p<0.05),with a reduction in MAE by 0.2±0.02 years across different racial ***,t-tests on the features also confirm the statistical significance of our approach(p<0.05).

关键词： Bone age assessment attention eraser quantitative feature metacarpal bones