检索结果-南通市图书馆

维普期刊数据库

Recent advances and practical challenges of high-energy-density flexible lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2024年第8期18卷 79-98页

作者： Guangxiang Zhang Xin Chen Yulin Ma Hua huo Pengjian Zuo Geping Yin Yunzhi Gao Chuankai Fu State Key Laboratory of Space Power-Sources Harbin Institute of TechnologyHarbin 150001China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China

With the rapid iteration and update of wearable flexible devices,high-energy-density flexible lithium-ion batteries are rapidly ***,energy density,and safety are all important indicators for flexible lithium-ion batteries,which can be determined jointly by material selection and structural ***,recent progress on high-energy-density electrode materials and flexible structure designs are *** electrode materials and the next-generation high-energy-density electrode materials are analyzed in *** electrolytes with high safety and excellent flexibility are classified and *** strategies to increase the mass loading of active materials on the electrodes by designing the current collector and electrode structure are discussed with keys of representative *** the novel configuration structures to enhance the flexibility of batteries are *** the end,it is pointed out that it is necessary to quantify the comprehensive performance of flexible lithium-ion batteries and simultaneously enhance the energy density,flexibility,and safety of batteries for the development of the next-generation high-energy-density flexible lithium-ion batteries.

关键词： lithium-ion batteries flexibility high energy density safety

“卡脖子”情境下科技领军企业突破性技术创新路径研究——基于创新生态系统视角

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

科学学与科学技术管理 2024年第5期45卷 163-183页

作者：霍影武建龙哈尔滨理工大学经济与管理学院哈尔滨150080 黑龙江科技大学管理学院哈尔滨150022

如何在国外领先企业主导的创新生态系统中突破“卡脖子”困境,实现突破性技术创新,是中国科技领军企业面临的重要问题。基于扎根理论,以华为作为案例分析对象,从创新生态系统视角对科技领军企业遭遇“卡脖子”情境的根本动因、阶段特征... 详细信息

如何在国外领先企业主导的创新生态系统中突破“卡脖子”困境,实现突破性技术创新,是中国科技领军企业面临的重要问题。基于扎根理论,以华为作为案例分析对象,从创新生态系统视角对科技领军企业遭遇“卡脖子”情境的根本动因、阶段特征、突围方式和突破结果进行探索,复盘刻画“卡脖子”情境下科技领军企业突破性技术创新路径。研究发现:第一,“卡脖子”情境触发科技领军企业通过组织动态演化、价值网络创新和技术范式变革协同演进,经历萌芽期、发展期、壮大期、扩张期持续取得突破性技术创新;第二,“卡脖子”的实质绝非停留在关键核心技术之战,而已演变为创新生态系统之争;第三,中国科技领军企业在国外领先企业主导的创新生态系统中占据创新生态位的变化符合“系统外围→系统次外围→趋向系统核心(占据战略生态位)→系统核心(占据关键结构洞)”的发展逻辑,物种属性的蜕变符合“低级(寄生)创新物种→中级(共生)创新物种→高级(竞争)创新物种→顶级(主导)创新物种”的进化过程;第四,“卡脖子”情境可被部署在创新链(上游/下游)、采用链和创新生存资源三个方面(四个层次),科技领军企业可以通过自创生态替代物种、培育生态替代种群、自创创新生态系统、创建生态突围种群的方式,对应突破关键核心技术、互补技术、原创技术和技术应用场景。

关键词：卡脖子科技领军企业突破性技术创新创新生态系统

维普期刊数据库

Apatite Fission Track Thermochronology of Granite from the Xiazhuang Uranium Ore Field,South China:Implications for Exhumation History and Ore Preservation

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2024年第2期98卷 430-440页

作者： SUN Yue CHEN Zhengle PAN Jiayong huo Hailong LI Haidong SUN Junjie XU Guangchun State Key Laboratory of Nuclear Resources and Environment School of Earth SciencesEast China University of TechnologyNanchang 330013China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China No.290 Research Institute CNNCShaoguanGuangdong 512029China

Xiazhuang uranium ore field,located in the southern part of the Nanling Metallogenic Belt,is considered one of the largest granite-related U regions in South *** this paper,we contribute new apatite fission track data and thermal history modeling to constrain the exhumation history and evaluate preservation potential of the Xiazhuang Uranium ore *** Triassic outcrop granite samples collected from different locations of Xiazhuang Uranium ore field yield AFT ages ranging from 43 to 24 Ma with similar mean confined fission track lengths ranging from 11.8±2.0 to 12.9±1.9μm and Dpar values between 1.01 and 1.51μ*** robustness time-temperature reconstructions of samples from the hanging wall of Huangpi fault show that the Xiazhuang Uranium ore field experienced a time of monotonous and slow cooling starting from middle Paleocene to middle Miocene(~60-10 Ma),followed by relatively rapid exhumation in the late Miocene(~10-5 Ma)and nearly thermal stability in the Pliocene-Quaternary(~5-0 Ma).The amount of exhumation after U mineralization since the Middle Paleogene was estimated as~4.3±1.8 km according to the integrated thermal history *** studies indicate that the ore-forming ages of U deposits in the Xiazhuang ore field are mainly before Middle Paleocene and the mineralization depths are more than 4.4±1.2 ***,the exhumation history since middle Paleocene plays important roles in the preservation of the Xiazhuang Uranium ore field.

关键词： apatite fission track exhumation history ore preservation Xiazhuang Uranium ore field South China

维普期刊数据库

Chiral electron transporting material for circularly polarized organic light-emitting diode

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第11期67卷 3777-3784页

作者： Peihao huo Tianyu Yang Peiyu Fang Yujia Li Nanlong Zheng Min Gong Zuqiang Bian Zhiwei Liu Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsCollege of Chemistry and Molecular Engineering Peking University

Circularly polarized organic light-emitting diode(CP-OLED) has attracted increasing interest for its efficient ability to generate circularly polarized light directly. So far, many CP-OLEDs were successfully fabricated with chiral emitters or chiral hosts. In this study, a new strategy based on chiral electron transporting layer is proposed to construct CP-OLEDs. A pair of chiral electron transporting materials, 1,3,5-tris((R/S)-4-isopropyl-4,5-dihydrooxazol-2-yl)benzene((R/S)-TOxiPr), are firstly designed and synthesized. The crystalline films of(R/S)-TOxiPr show circularly polarized photoluminescence with photoluminescence dissymmetry factors of-0.067 and +0.041, respectively. The CP-OLEDs based on(R/S)-TOxiPr and three types of achiral emitters all exhibit circularly polarized electroluminescence, showing feasibility and strong versatility of this new strategy. The mechanism is attributed to in-situ electrical excitation instead of simply light filtering of non-circularly polarized light. This work demonstrates a new approach for realizing circularly polarized electroluminescence which may provide a valuable strategy to develop CP-OLEDs.

关键词： circularly polarized organic light-emitting diodes chiral electron transporting layer trisoxazolinylbenzene circularly polarized electroluminescence

Viral-mediated gene therapy in pediatric neurological disorders

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Pediatrics 2024年第6期20卷 533-555页

作者： Jing Peng Wei-Wei Zou Xiao-Lei Wang Zhi-Guo Zhang Ran huo Li Yang Department of Pediatrics Clinical Research Center for Chidren Neurodevelopmental disablities of Hunan ProvinceXiangya HospitalCentral South UniversityChangsha 410008China Reproductive Medicine Center Department of Obstetrics and Gynecologythe First Affiliated Hospital of Anhui Medical UniversityHefeiChina State Key Laboratory of Reproductive Medicine Nanjing Medical UniversityNanjingChina

Background Due to the broad application of next-generation sequencing,the molecular diagnosis of genetic disorders in pediatric neurology is no longer an unachievable ***,treatments for neurological genetic disorders in children remain primarily *** the other hand,with the continuous evolution of therapeutic viral vectors,gene therapy is becoming a clinical *** this perspective,we wrote this review to illustrate the current state regarding viral-mediated gene therapy in childhood neurological *** sources We searched databases,including PubMed and Google Scholar,using the keywords"adenovirus vector,""lentivirus vector,"and"AAv"for gene therapy,and"immunoreaction induced by gene therapy vectors,""administration routes of gene therapy vectors,"and"gene therapy"with"NCL,""SMA,""DMD,""congenital myopathy,""MPS""leukodystrophy,"or"pediatric metabolic disorders".We also screened the database of *** using the keywords"gene therapy for children"and then filtered the results with the ones aimed at neurological *** time range of the search procedure was from the inception of the databases to the *** We presented the characteristics of commonly used viral vectors for gene therapy for pediatric neurological disorders and summarized their merits and drawbacks,the administration routes of each vector,the research progress,and the clinical application status of viral-mediated gene therapy on pediatric neurological *** Viral-mediated gene therapy is on the brink of broad clinical ***-mediated gene therapy will dramatically change the treatment pattern of childhood neurological disorders,and many children with incurable diseases will meet the dawn of a ***,the vectors must be optimized for better safety and efficacy.

关键词： Gene therapy Neurological disorders Pediatrics Viral vectors

Phase transition of multi-component(TiZrVNb)C ceramics—Part I:Phase decomposition induced by carbon content

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2024年第5期13卷 679-688页

作者： Qingyi Kong Rao Zhang Lei Chen Sijia huo Wenyu Lu Yujin Wang Boxin Wei Yu Zhou Institute for Advanced Ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China Key Laboratory of Advanced Structure‒Function Integrated Materials and Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Chemical Engineering Harbin University of Science and TechnologyHarbin 150001China National Key Laboratory of Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001China

Phase decomposition can effectively enhance the mechanical properties of carbide ceramics and can overcome the difficulty of enhancing the mechanical properties of single-phase multicomponent carbide *** this work,a series of nonstoichiometric(TiZrVNb)Cx ceramics were prepared by spark plasma sintering(SPS)at different *** effects of the carbon content on the phase composition,microstructure evolution,and mechanical properties were investigated in *** decomposition occurred with decreasing carbon *** different solid solutions of(Ti,V)-rich and Zr-rich phases formed from the decomposition of equimolar single-phase solid solutions,namely,the Zr-poor phase and Zr-rich phase,*** distribution of Nb element is relatively *** semicoherent interfaces between the Zr-poor phase and the Zr-rich phase can harden and strengthen effectively under the synergistic effect of grain *** with phase decomposition structures have apparent advantages compared to single-phase high-entropy *** work provides an important train of thought for the microstructure tailoring and properties optimization of multi-component carbide ceramics.

关键词： multicomponent ceramics nontoichiometry microstructure evolution phase decomposition mechanical properties

Rank-generating functions and Poincaré polynomials of lattices in finite orthogonal space of even characteristic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2024年第4期19卷 181-189页

作者： Feng XU Yanbing ZHAO Yuanji huo Office of Academic Affairs Xuanhua Vocational College of Science and TechnologyZhangjiakou 075100China Department of Basic Courses Zhangjiakou Vocational and Technical CollegeZhangjiakou 075051China Department of Mathematics Hebei North UniversityZhangjiakou 075000China

The geometry of classical groups over finite fields is widely used in many *** this paper,we study the rank-generating function,the characteristic polynomial,and the Poincarépolynomial of lattices generated by the or... 详细信息

关键词： Lattices orthogonal space of even characteristic rank-generating function characteristic polynomial Poincarépolynomial

Influences of lauric acid addition on performance,nutrient digestibility and proteins related to mammary gland development in dairy cows

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Animal Nutrition 2024年第3期18卷 272-283页

作者： Jing Zhang Lijun Bu Yapeng Liu Wenjie huo Chengqiang Xia Caixia Pei Qiang Liu College of Animal Science Shanxi Agricultural UniversityTaigu 030801Shanxi ProvinceChina

Lauric acid(LA)has the possibility to improve milk production in dairy cows by improving mammary gland development,however,the mechanism by which it might regulate mammary gland development is *** influence of LA on milk production,nutrient digestibility and the expression of proteins related to mammary gland development in dairy cows were *** primiparous Holstein dairy cows were divided into 4 groups in a randomized block *** treatments included the control(0 g/d LA per cow),low-LA(100 g/d LA per cow),medium-LA(200 g/d LA per cow),and high-LA(300 g/d LA per cow).Yields of milk,fat-corrected milk,and energy-corrected milk quadratically increased(P<0.05),and yield and content of milk fat linearly increased(P<0.05)with LA *** of C12:0,C18:1 and C20:1 fatty acids in milk fat linearly increased(P<0.05),but that of C16:0 fatty acid linearly decreased(P=0.046).Supplementation of LA led to a linear and quadratical increase(P<0.05)in digestibility of dry matter,organic matter,neutral detergent fibre and acid detergent fibre,and ruminal total volatile fatty acid concentration but a linear reduction(P=0.018)in the ratio of acetate to *** enzymatic activities of ruminal pectinase,xylanase,andα-amylase,and populations of total bacteria and anaerobic fungi increased linearly(P<0.05),while populations of total protozoa and methanogens decreased linearly(P<0.05)with increased LA *** LA addition,blood glucose,triglyceride,estradiol,prolactin,and insulin-like growth factor 1 concentrations increased linearly(P<0.05)and albumin and total protein concentrations increased quadratically(P<0.05).Moreover,addition of 200 g/d LA promoted(P<0.05)the expression of protein involved in mammary gland development and fatty acids *** results suggested that LA addition enhanced milk production and fatty acids synthesis by stimulating nutrient digestion,the expression of proteins associated with milk fat synth

关键词： Lactation performance Lauric acid Mammary gland development Milk fat synthesis Nutrient digestibility

Intelligent early-warning platform for open-pit mining: Current status and prospects

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rock Mechanics Bulletin

Rock Mechanics Bulletin 2024年第1期3卷 16-36页

作者： Zhanping Song Xu Li Runke huo Lianbaochao Liu School of Civil Engineering Xi'an University of Architecture and TechnologyXi'an710055China Shaanxi Key Lab of Geotechnical and Underground Space Engineering Xi'an710055China

As the profundity of open-pit mining operations has increased,so has the frequency of geological *** complex interaction of factors causing these disasters presents technical challenges for early warning and control ***,emergent technologies such as the internet,5G networks,and artificial intelligence provide new opportunities for constructing integrated digital early warning platforms that synthesise multifaceted monitoring data to predict and mitigate open-pit mine *** efficient Internet-mediated information integration,data from various sources can be consolidated for enhanced disaster *** paper reviews the current state of digital early warning platforms for open-pit mines using a Web of Science database search for pertinent *** framework,data layer,technology layer,and application layer of these platforms are investigated in order to identify associated technologies and *** results include:(1)Inconsistent data formats and monitoring software diminish platform workflow *** data exchange protocols and feature-rich software could increase efficiency.(2)Platforms rely on limited data types as opposed to intelligent algorithms that integrate diverse monitoring inputs into global disaster *** underutilization of advanced technologies such as artificial intelligence,the internet of things,and cloud *** calamity mechanisms and rock mechanics require additional study.

关键词： Digital early warning platform Geological disaster Data mining AI Multi-source information fusion