检索结果-南通市图书馆

Flexible, Transparent and Conductive Metal Mesh Films with Ultra‑High FoM for Stretchable Heating and Electromagnetic Interference Shielding

引用

Nano-Micro Letters 2024年第5期16卷 201-213页

作者： Zibo Chen Shaodian Yang Junhua huang Yifan Gu weibo huang Shaoyong Liu Zhiqiang Lin Zhiping Zeng Yougen Hu Zimin Chen Boru Yang Xuchun Gui State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510275People’s Republic of China Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packing Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongPeople’s Republic of China School of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275People’s Republic of China

Despite the growing demand for transparent conductive films in smart and wearable electronics for electromagnetic interference(EMI)shielding,achieving a flexible EMI shielding film,while maintaining a high transmittance remains a significant challenge.Herein,a flexible,transparent,and conductive copper(Cu)metal mesh film for EMI shielding is fabricated by self-forming crackle template method and electroplating technique.The Cu mesh film shows an ultra-low sheet resistance(0.18Ω□^(-1)),high transmittance(85.8%@550 nm),and ultra-high figure of merit(>13,000).It also has satisfactory stretchability and mechanical stability,with a resistance increases of only 1.3%after 1,000 bending cycles.As a stretchable heater(ε>30%),the saturation temperature of the film can reach over 110°C within 60 s at 1.00 V applied voltage.Moreover,the metal mesh film exhibits outstanding average EMI shielding effectiveness of 40.4 dB in the X-band at the thickness of 2.5μm.As a demonstration,it is used as a transparent window for shielding the wireless communication electromagnetic waves.Therefore,the flexible and transparent conductive Cu mesh film proposed in this work provides a promising candidate for the next-generation EMI shielding applications.

关键词： Metal mesh Transparent conductive film Stretchable heater Electromagnetic interference shielding

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Screening and identifying natural products with SARS-CoV-2 infection inhibitory activity from medicinal fungi

引用

Biosafety and Health 2024年第1期6卷 12-20页

作者： Shuang Zhao Amelia Siqi huang weibo Zhang Lili Ren Hexiang Wang Jianbin Wang Xinyang Shao Guanbo Wang Institute of Agri-Food Processing and Nutrition Institute of Plant ProtectionBeijing Academy of Agriculture and Forestry SciencesBejing 100097China Bejing Key Laboratory of Fruits and Vegetable Storage and Processing Key Laboratory of Vegetable Postharvest ProcessingMinistry of AgricultureBejing 100097China Dalton Academy The Affliated High School of Peking UniversityBeijing 100190China NHC Key Laboratory of Systems Biology of Pathogens and Christophe Merieux Laboratory National Institute of Pathogen BiologyBejing 100730China Key Laboratory of Respiratory Disease Pathogenomics Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China College of Biological Sciences China Agricultural UniversityBejing 100193China School of Life Sciences Tsinghua UniversityBeijing 100084China Changping Laboratory Beijing 102206China Institute for Cell Analysis Shenzhen Bay LaboratoryShenzhen 518132China

The coronavirus disease of 2019(COVID‐19),a global pandemic caused by the severe acute respiratory syndrome coronavirus 2(SARS‐CoV‐2),can result in severe health complications.In addition to physical preventative measures,pharmaceutical intervention is also crucial.Numerous natural products from medicinal fungi have shown promise as potential antiviral drugs and may serve as a source of effective components with antiviral activity against SARS‐CoV‐2 and other coronaviruses.In this study,we developed a workflow that integrates viral infection inhibition assays at both cellular and molecular levels,as well as molecular separation and characterization,to screen and identify natural products with antiviral activity.Using this workflow,we screened 167 extracts extracted from 36 medicinal fungi using optimized extraction methods.We assessed the antiviral effects of these extracts by measuring their ability to inhibit SARS‐CoV‐2 infection and receptor binding domain‐human angiotensin‐converting enzyme 2(RBD‐hACE2)binding in vitro.Following charge‐and size‐based characterization of the active compounds through filtration and chromatographic fractionation,mass spectrometry characterization of the fractionated compounds revealed that the active components are polysaccharides and determined their monosaccharide residue composition.Our findings provide new insights into the antiviral potential of natural products and their screening strategies and may contribute to the development of effective antiviral therapeutics against COVID‐19 and other diseases.

关键词： Medicinal fungi Natural products Antiviral activity COVID‐19 Polysaccharides

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Lactate regulates major zygotic genome activation by H3K18 lactylation in mammals

引用

National Science Review 2024年第2期11卷 124-134页

作者： Jingyu Li weibo Hou Qi Zhao Wei Han Hongdi Cui Songling Xiao Ling Zhu Jiadan Qu Xiaoyu Liu Weitao Cong Jingling Shen Yuzheng Zhao Shaorong Gao Guoning huang Qingran Kong Chongqing Key Laboratory of Human Embryo Engineering Center for Reproductive Medicine Chongqing Health Center for Women and ChildrenWomen and Children's Hospital of Chongqing Medical University Oujiang Laboratory Zhejiang Provincial Key Laboratory of Medical Genetics Key Laboratory of Laboratory MedicineMinistry of EducationSchool of Laboratory Medicine and Life Sciences Wenzhou Medical University Frontier Science Center for Stem Cell Research School of Life Sciences and Technology Tongji University School of Pharmaceutical Science Wenzhou Medical University Institute of Life Sciences College of Life and Environmental Sciences Wenzhou University Optogenetics&Synthetic Biology Interdisciplinary Research Center State Key Laboratory of Bioreactor Engineering Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism School of Pharmacy East China University of Science and Technology

Lactate is present at a high level in the microenvironment of mammalian preimplantation embryos in vivo and in vitro. However, its role in preimplantation development is unclear. Here, we report that lactate is highly enriched in the nuclei of early embryos when major zygotic genome activation(ZGA) occurs in humans and mice. The inhibition of its production and uptake results in developmental arrest at the 2-cell stage, major ZGA failure, and loss of lactate-derived H3K18lac, which could be rescued by the addition of Lac-Co A and recapitulated by overexpression of H3K18R mutation. By profiling the landscape of H3K18lac during mouse preimplantation development, we show that H3K18lac is enriched on the promoter regions of most major ZGA genes and correlates with their expressions. In humans, H3K18lac is also enriched in ZGA markers and temporally concomitant with their expressions. Taken together, we profile the landscapes of H3K18lac in mouse and human preimplantation embryos, and demonstrate the important role for H3K18lac in major ZGA, showing that a conserved metabolic mechanism underlies preimplantation development of mammalian embryos.

关键词： mammalian preimplantation development lactate epigenetic remodeling histone lactylation zygotic genome activation

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Understanding and improving fairness in cognitive diagnosis

引用

Science China(Information Sciences) 2024年第5期67卷 99-114页

作者： Zheng ZHANG Le WU Qi LIU Jiayu LIU Zhenya huang Yu YIN Yan Zhuang weibo GAO Enhong CHEN Anhui Province Key Laboratory of Big Data Analysis and Application School of Computer Science and Technology& School of Data Science University of Science and Technology of China State Key Laboratory of Cognitive Intelligence School of Computer Science and Information Engineering Hefei University of Technology

Intelligent education is a significant application of artificial intelligence. One of the key research topics in intelligence education is cognitive diagnosis, which aims to gauge the level of proficiency among students on specific knowledge concepts(e.g., Geometry). To the best of our knowledge, most of the existing cognitive models primarily focus on improving diagnostic accuracy while rarely considering fairness issues; for instance, the diagnosis of students may be affected by various sensitive attributes(e.g., region). In this paper,we aim to explore fairness in cognitive diagnosis and answer two questions:(1) Are the results of existing cognitive diagnosis models affected by sensitive attributes?(2) If yes, how can we mitigate the impact of sensitive attributes to ensure fair diagnosis results? To this end, we first empirically reveal that several wellknown cognitive diagnosis methods usually lead to unfair performances, and the trend of unfairness varies among different cognitive diagnosis models. Then, we make a theoretical analysis to explain the reasons behind this phenomenon. To resolve the unfairness problem in existing cognitive diagnosis models, we propose a general fairness-aware cognitive diagnosis framework, FairCD. Our fundamental principle involves eliminating the effect of sensitive attributes on student proficiency. To achieve this, we divide student proficiency in existing cognitive diagnosis models into two components: bias proficiency and fair proficiency.We design two orthogonal tasks for each of them to ensure that fairness in proficiency remains independent of sensitive attributes and take it as the final diagnosed result. Extensive experiments on the Program for International Student Assessment(PISA) dataset clearly show the effectiveness of our framework.

关键词： fairness intelligent education cognitive diagnosis psychometrics adversarial learning

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Two-step phase manipulation by tailoring chemical bonds results in high-performance GeSe thermoelectrics

引用

The Innovation 2023年第6期4卷 59-68页

作者： Wenqing Yao Yihua Zhang Tu Lyu weibo huang Nuoxian huang Xiang Li Chaohua Zhang Fusheng Liu Matthias Wuttig Yuan Yu Min Hong Lipeng Hu College of Materials Science and Engineering Shenzhen UniversityShenzhen 518060China Institute of Physics(A) RWTH Aachen UniversitySommerfeldstraBe 1452074 AachenGermany PGI 10(Green IT) Forschungszentrum Jjilich GmbH52428 JdlichGermany Center for Future Materials and School of Engineering University of Southem QueenslandSpringfield CentralQLD 4300Australia

In thermoelectrics,phase engineering serves a crucial function in deter-mining the power factor by affecting the band degeneracy.However,for low-symmetry compounds,the mainstream one-step phase manipulation strategy,depending solely on the valley or orbital degeneracy,is inadequate to attain a high density-of-states effective mass and exceptional zT.Here,we employ a distinctive two-step phase manipulation strategy through stepwise tailoring chemical bonds in GeSe.Initially,we amplify the valley degeneracy via CdTe alloying,which elevates the crystal symmetry from a covalently bonded orthorhombic to a metavalently bonded rhombohedral phase by significantly suppressing the Peierls distortion.Subsequently,we incorporate Pb to trigger the convergence of multivalence bands and further enhance the density-of-states effective mass by moderately restraining the Peierls distortion.Additionally,the atypical metavalent bonding in rhombohedral GeSe enables a high Ge vacancy concentration and a small band effective mass,leading to increased carrier concentration and mobility.This weak chemical bond along with strong lattice anharmonicity also reduces lattice thermal conductivity.Consequently,this unique property ensemble contributes to an outstanding zT of 0.9 at 773 K for Geo.8oPbo.2oSe(CdTe)o.25.This work underscores the pivotal role of the two-step phase manipulation by stepwise tailoring of chemical bonds in improving the thermoelectric performance of p-bonded chalcogenides.

关键词： alloying phase chemical

来源：

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

Sensor-based complete coverage path planning in dynamic environment for cleaning robot

引用

CAAI Transactions on Intelligence Technology 2018年第1期3卷 65-72页

作者： Hong Liu Jiayao Ma weibo huang Human Robot Interaction Lab Shenzhen Graduate School Peking University Shenzhen 518055 People's Republic of China

Using Complete Coverage Path Planning (CCPP), a cleaning robot could visit every accessible area in the workspace. The dynamic environment requires the higher computation of the CCPP algorithm because the path needs to be replanned when the path might become invalid. In previous CCPP methods, when the neighbours of the current position are obstacles or have been visited, it is challenging for the robot to escape from the deadlocks with the least extra time cost. In this study, a novel CCPP algorithm is proposed to deal with deadlock problems in a dynamic environment. A priority template inspired by the short memory model could reduce the number of deadlocks by giving the priority of directions. Simultaneously, a global backtracking mechanism guides the robot to move to the next unvisited area quickly, taking the use of the explored global environmental information. What's more, the authors extend their CCPP algorithm to a multi-robot system with a market-based bidding process which could deploy the coverage time. Experiments of apartment-like scenes show that the authors’ proposed algorithm can guarantee an efficient collision-free coverage in dynamic environments. The proposed method performs better than related approaches on coverage rate and overlap length.

关键词：路径规划清洁机器人人工智能发展现状

来源：

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

基于新能源快速调节的孤岛微网弹性恢复策略

引用

电网技术 2024年第3期48卷 1103-1113页

作者：马静黄韦博聂珍存李佳伦新能源电力系统全国重点实验室(华北电力大学) 北京市昌平区102206

针对当前孤岛运行微网面临的备用调节容量不足、负荷投切频繁和供电可靠性较低的问题,提出一种基于新能源快速调节的孤岛微网弹性恢复策略。首先根据新能源的快速功率控制技术,建立风、光电源的可快速调节容量模型。在此基础上,以孤岛... 详细信息

针对当前孤岛运行微网面临的备用调节容量不足、负荷投切频繁和供电可靠性较低的问题,提出一种基于新能源快速调节的孤岛微网弹性恢复策略。首先根据新能源的快速功率控制技术,建立风、光电源的可快速调节容量模型。在此基础上,以孤岛负荷恢复价值量最大化为目标,考虑孤岛内电源和负荷的波动性、储能和负荷的调节量,根据电源出力程度和负荷可控量,分析不同电源负荷功率关系下的孤岛备用容量来源。然后,考虑新能源快速功率调节技术,分别制定电源充足、电源不足和极端情况下的孤岛弹性运行控制策略。最后,基于改进的41节点公路微网系统进行仿真验证,结果表明,所提恢复策略在保证负荷恢复价值量的同时,能够预留充足的备用容量,显著提升孤岛微网的运行弹性和供电恢复能力。

关键词：孤岛运行新能源快速功率控制弹性供电恢复

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Successful treatment of severe monkeypox case with advanced HIV infection using plasma from smallpoxvaccinated healthy population:A case report

引用

iLABMED 2024年第1期2卷 60-66页

作者： Chuming Chen Weiming Yao Siran huang Ling Peng Shiyan Feng weibo Wu Yunlan Yi Zhiqiang Cheng Yang Yang Yan Yang Liuqing Yang Hongzhou Lu Fuxiang Wang Department of Infectious Diseases National Clinical Research Center for Infectious DiseaseShenzhen Third People's HospitalThe Second Affiliated HospitalSchool of MedicineSouthern University of Science and TechnologyShenzhenGuangdongChina Department of Pathology National Clinical Research Center for Infectious DiseaseShenzhen Third People's HospitalThe Second Affiliated HospitalSchool of MedicineSouthern University of Science and TechnologyShenzhenGuangdongChina Department of Blood Transfusion National Clinical Research Center for Infectious DiseaseShenzhen Third People's HospitalThe Second Affiliated HospitalSchool of MedicineSouthern University of Science and TechnologyShenzhenGuangdongChina

Since the first reported case of monkeypox in the UK in May 2022,there has been an upward trend in monkeypox cases and a global outbreak.However,reports of severe cases are relatively limited.In this study,we report a case of severe monkeypox in a patient with HIV.The patient presented with skin lesions that started on his face and around the penis and persisted for several months.Throughout the course of the disease,he received systematic symp-tomatic supportive treatment,topical remedies,and special care for the rash.He also underwent cidofovir antiviral therapy and smallpox‐vaccinated healthy population‐derived plasma therapy in succession,with the condition ultimately showing improvement after plasma treatment.After more than 3 months of hospitalization,he fully recovered.To the best of our knowledge,this is the first reported use of smallpox‐vaccinated healthy population‐derived plasma in the treatment of severe monkeypox cases.

关键词： antiviral therapy co‐infection HIV monkeypox plasma therapy severe infection

来源：

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

柴胡疏肝颗粒调控Keap1-Nrf2/HO-1信号通路改善四氯化碳诱导的小鼠急性肝损伤

引用

中国药学杂志 2024年第8期59卷 703-712页

作者：黄海锋庞晓妍戴卫波黄曼婷曾聪彦广州中医药大学附属中山中医院广东中山528400 广东江门中医药职业学院广东江门529000

目的探讨柴胡疏肝颗粒对小鼠急性肝损伤的保护作用及可能机制。方法将柴胡疏肝颗粒按低、中、高(生药量:11.4、22.8、45.6 g·kg^(-1))3个剂量连续给药7 d,末次给药2 h后,除正常对照组外,用体积分数0.2%四氯化碳(tetrachloromethane,CC... 详细信息

目的探讨柴胡疏肝颗粒对小鼠急性肝损伤的保护作用及可能机制。方法将柴胡疏肝颗粒按低、中、高(生药量:11.4、22.8、45.6 g·kg^(-1))3个剂量连续给药7 d,末次给药2 h后,除正常对照组外,用体积分数0.2%四氯化碳(tetrachloromethane,CCl4)溶液造模,12 h后,收集小鼠的血清和肝组织,制作肝组织病理切片。测定血清中丙氨酸氨基转移酶(alanine aminotransferase,ALT)、天门冬氨酸氨基转移酶(aspartate aminotransferase,AST)和肝组织中超氧化物歧化酶(superoxide dismutase,SOD)、丙二醛(malondialdehyde,MDA)、白细胞介素6(interleukin 6,IL-6)、肿瘤坏死因子α(tumor necrosis factorα,TNF-α),以及活性氧自由基(reactive oxygen species,ROS)含量;转录组学获得肝脏组织差异表达mRNA并富集与差异表达基因显著相关的通路;代谢组学研究肝组织中内源性代谢物变化并进行通路富集分析;免疫组织化学法及Western blot法检测肝组织中c-Jun氨基末端激酶(c-Jun N-terminal kinase,JNK)、p38丝裂原活化蛋白激酶(p38 mitogen-activated protein kinase,p38 MARK)、Kelch样ECH关联蛋白1(kelch-like ECH-associated protein 1,Keap1)、核因子E2相关因子2(nuclear factor erythroid 2-related factor 2,Nrf2)、血红素加氧酶-1(heme oxygenase-1,HO-1)表达及定位情况。结果与模型组比较,柴胡疏肝颗粒能显著降低小鼠血清ALT、AST和肝组织MDA、IL-6、TNF-α及ROS水平(P<0.05或P<0.01),显著升高肝组织中SOD水平(P<0.01),明显减轻肝细胞坏死及炎性浸润程度;上调Nqo1基因,上调醌氧化还原酶1[NAD(P)H:quinone oxidoreductase 1,NQO1]表达;下调Ccl2基因,下调单核细胞趋化蛋白-1(monocyte chemotactic protein 1,MCP-1)表达,且代谢物中有机酸类显著下调,糖类显著上调。肝组织中JNK、p38 MARK、Keap1表达均显著下调(P<0.05或P<0.01),Nrf2、HO-1表达显著上调(P<0.01)。结论柴胡疏肝颗粒可能通过激活Keap1-Nrf2/HO-1信号通路,对CCl4诱导的小鼠急性肝损伤具有保护作用。

关键词：柴胡疏肝颗粒急性肝损伤氧化应激 Kelch样ECH关联蛋白-核因子E1/血红素加氧酶-1信号通路

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Super-resolution parameter estimation of monopulse radar by wide-narrowband joint processing

引用

系统工程与电子技术:英文版 2023年第5期34卷 1158-1170页

作者： CAI Tianyi DAN Bo huang weibo Sichuan Institute of Aerospace Electronic Equipment Chengdu 610100China Coastal Defense College Naval Aviation UniversityYantai 264001China

The angular resolution of radar is of crucial signifi-cance to its tracking performance.In this paper,a super-resolu-tion parameter estimation algorithm based on wide-narrowband joint processing is proposed to improve the angular resolution of wideband monopulse radar.The range cells containing resolv-able scattering points are detected in the wideband mode,and these range cells are adopted to estimate part of the target parameters by algorithms of low computational requirement.Then,the likelihood function of the echo is constructed in the narrow-band mode to estimate the rest of the parameters,and the parameters estimated in the wideband mode are employed to reduce computation and enhance estimation accuracy.Simu-lation results demonstrate that the proposed algorithm has higher estimation accuracy and lower computational complexity than the current algorithm and can avoid the risk of model mis-match.

关键词： monopulse radar super-resolution wide-narrow band processing parameter estimation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：