检索结果-南通市图书馆

Review on analytical technologies and applications in metabolomics

在线全文

学校读者我要写书评

暂无评论

BIOCELL 2024年第1期48卷 65-78页

作者： xin meng YAN LIU SHUJUN XU LIANRONG YANG RUI YIN School of Pharmacy Heilongjiang University of Chinese MedicineHarbinChina

Over the past decade,the swift advancement of metabolomics can be credited to significant progress in technologies such as mass spectrometry,nuclear magnetic resonance,and multivariate ***,metabolomics garners widespread application across diverse fields including drug research and development,early disease detection,toxicology,food and nutrition science,biology,prescription,and chinmedomics,among *** serves as an effective characterization technique,offering insights into physiological process alterations in *** changes may result from various exogenous factors like environmental conditions,stress,medications,as well as endogenous elements including genetic and protein-based *** potential scientific outcomes gleaned from these insights have catalyzed the formulation of innovative methods,poised to further broaden the scope of this ***,metabolomics has evolved into a valuable and widely accepted instrument in the life ***,comprehensive reviews focusing on the sample preparation and analytical methodologies employed in metabolomics within the life sciences are surprisingly *** review aims to fill that gap,providing an overview of current trends and recent advancements in *** emphasis is placed on sample preparation,sophisticated analytical techniques,and their applications in life science research.

关键词： Metabolomics Sample preparation Analytical methods Application of metabolomics

MFCC based real-time speech reproduction and recognition using distributed acoustic sensing technology

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

Optoelectronics Letters 2024年第4期20卷 222-227页

作者： ZHOU Ran ZHAO Shuai LUO Mingming meng xin MA Jie LIU Jianfei School of Electronic Information Engineering Hebei University of TechnologyTianjin 300401China Tianjin Key Laboratory of Electronic Materials and Devices Hebei University of TechnologyTianjin 300401China Hebei Key Laboratory of Advanced Laser Technology and Equipment Hebei University of TechnologyTianjin 300401China

The distributed acoustic sensing technology was used for real-time speech reproduction and recognition,in which the voiceprint can be extracted by the Mel frequency cepstral coefficient(MFCC)method.A classic ancient Chinese poem“You Zi Yin”,also called“A Traveler’s Song”,was analyzed both in time and frequency domains,where its real-time reproduction was achieved with a 116.91 ms time *** smaller scaled MFCC0 at 1/12 of MFCC matrix was taken as a feature vector of each line against the ambient noise,which provides a recognition method via cross-correlation among the 6 original and recovered verse *** averaged cross-correlation coefficient of the matching pairs is calculated to be 0.5806 higher than 0.1883 of the nonmatched pairs,promising an accurate and fast method for real-time speech reproduction and recognition over a passive optical fiber.

关键词： MFCC passive coefficient

Yolk shell-structured pyrite-type cobalt sulfide grafted by nitrogen-doped carbon-needles with enhanced electrical conductivity for oxygen electrocatalysis

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第7期35卷 212-217页

作者： Jiahao Xie Jin Liu Bin Liu xin meng Zhuang Cai Xiaoqin Xu Cheng Wang Shijie You Jinlong Zou Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

Pyrite-type sulfides(PTS)exhibit promising intrinsic activities for oxygen reduction and evolution reactions(ORR/OER).However,their poor electrical conductivities may limit the charge transfer rate to inevitably lower ***,yolk-shell structured cobalt-pyrite nanospheres(CoS_(2)YSS)are prepared and modified with amino groups as nucleation sites for coupling highly-conductive needle-like nitrogendoped carbon via a facile solvothermal method(CoS_(2)YSS@NC).The as-marked CoS_(2)YSS@NC-0.5 shows a gap between yolk and shell,and an obvious exterior layer of grafted NC,which can provide an integrated structure,an interior place,and three exposed surfaces on CoS_(2).CoS_(2)YSS@NC-0.5 reveals higher ORR activity(half-wave potential of 0.88 V)and methanol resistance than commercial Pt/*** to in-situ formation of highly-active CoOOH,CoS_(2)YSS@NC-0.5 shows a better overpotential(244 mV at 10 mA/cm^(2))and Tafel slope(135 mV/dec)than ***-air battery with CoS_(2)YSS@NC-0.5 air-cathode exhibits good open circuit potential(1.44 V),specific capacity(772.5 mAh/g)and cycling ***-like NC layer coated on the yolk-shell structure of CoS_(2)effectively lowers the charge transfer resistance to obtain extraordinary ORR/OER *** indicates that the integration of highly-conductive carbon onto pyritetype sulfides is an effective strategy to acquire durable bifunctional ORR/OER catalysts.

关键词： Cobalt sulfides Cycle stability Electrical conductivity Pyrite Yolk-shell structure

同方期刊数据库

Accelerating the evaluation of operational lifetimes of perovskite solar cells and modules

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第7期94卷 1-9页

作者： Fumeng Ren Qian Lu xin meng Jing Zhou Rui Chen Jianan Wang Haixin Wang Sanwan Liu Zonghao Liu Wei Chen Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074HubeiChina China-EU Institute for Clean and Renewable Energy Huazhong University of Science and TechnologyWuhan 430073HubeiChina Powerchina Huadong Engineering Corporation Limited Hangzhou 311122ZhejiangChina Optics Valley Laboratory Wuhan 430074HubeiChina

Compared with the power conversion efficicency,the operational stability of perovskite solar cells(PsCs)remains a major challenge hampering its ***,conducting a light soaking test under 1 sun illumination to get a long lifetime is time-consuming and experimentally ***,we report an accelerated stability test protocol by aging PsCs under high-intensity light illumination to accelerate the evaluation of their operation *** is found that the efficiency degradation rate of a typical inverted PsC is almost linearly dependent on the light intensity within the range of 1 to 4 suns regardless of the *** results prove that it can save the light-soaking time by at least 4 times to predict the operation lifetime on the basis of the equivalent light irradiation dose.

关键词： Perovskite Light-soaking Stability

在线全文

学校读者我要写书评

暂无评论

清末民初报刊剧话的文体承变与理论革新

文艺理论研究 2024年第2期44卷 167-178页

作者：孟昕复旦大学中文系华东师范大学中文系上海市200433

报刊剧话与聚焦传奇杂剧、文学批评本位的古代曲话之间并非简单的线性承继关系,而是直接滥觞于清中后期文人的梨园花谱写作。经由报刊媒介的形塑、戏剧改良思潮的推动与中外剧论的滋养,剧话于民国元年前后定型为一种以京剧、新剧等舞台... 详细信息

报刊剧话与聚焦传奇杂剧、文学批评本位的古代曲话之间并非简单的线性承继关系,而是直接滥觞于清中后期文人的梨园花谱写作。经由报刊媒介的形塑、戏剧改良思潮的推动与中外剧论的滋养,剧话于民国元年前后定型为一种以京剧、新剧等舞台流行剧种为主要批评对象,以即时化、公开化、品牌化的跨平台专栏创作为特色生产模式,文本与舞台兼重、史论研究与实践批评并举的综合性艺术批评文体。舞台本位意识在清末民初报刊剧话中的建构发展反映了古典戏剧理论“剧学”体系内部重心由“剧本作法”向“表演艺术”的迁移,曲话的独立发展、京剧与新剧剧话的日趋分离亦可视作传统剧论对近代传奇杂剧、花部戏曲、外来新剧“三足鼎立”之全新剧体格局的直接回应。

关键词：清末民初报刊剧话批评文体戏剧理论批评

Phase modulation of nickel-tin alloys in regulating electrocatalytic nitrogen reduction properties

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第6期43卷 2851-2858页

作者： Lin Wang Hang-Ning Liu xin meng Chang-Hui Sun Hai-Dong Liu Liang-Yu Gong Zhen-Hua Yan Jie Wang College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural UniversityQingdao 266109China Department of Chemistry-Angstrom Laboratory Uppsala University75121UppsalaSweden Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Electrocatalytic nitrogen reduction reaction(NRR)is one of the attractive methods for ammonia(NH_(3))production at ambient conditions,but the catalytic performance largely depends on the physical properties of the ***,Ni-Sn alloy nanoparticles with well-controlled physical properties have been synthesized via a simple two-step method,which are applied as efficient electrocatalysts for the NRR.

关键词： alloys alloy nickel

剪切增稠幂律流体中单气泡上升动力学行为的格子Boltzmann方法研究

在线全文

学校读者我要写书评

暂无评论

物理学报 2024年第13期73卷 190-200页

作者：许鑫萌娄钦上海理工大学能源与动力工程学院上海200093

采用不可压非牛顿气液两相流格子Boltzmann方法研究了剪切增稠流体中气泡上升的动力学行为,重点分析了流变指数n、Eoυos数(Eo)和Galilei数(Ga)对气泡形变、终端速度和剪切速率的影响.数值结果表明:气泡形变程度随Eo的增大而增大,n对气... 详细信息

采用不可压非牛顿气液两相流格子Boltzmann方法研究了剪切增稠流体中气泡上升的动力学行为,重点分析了流变指数n、Eoυos数(Eo)和Galilei数(Ga)对气泡形变、终端速度和剪切速率的影响.数值结果表明:气泡形变程度随Eo的增大而增大,n对气泡形状的影响与Ga相关.另一方面,随着Ga增大,气泡终端速度随n呈非线性单调增大,且n对终端速度的影响随Ga的增大逐渐明显;当Ga固定且值较小时,气泡终端速度在较小Eo下随n的增大先增大后减小,而当Eo较大时终端速度随n的增大呈增大趋势;当Ga固定且较大时,气泡终端速度在Eo较大时较为统一地随n增大而增大.此外,气泡左右两端存在剪切速率较高的区域,该区域尺寸随Eo,Ga的增大而增大,随n的增大先增大后缩小.最后利用正交试验法得到上述三变量对剪切速率和终端速度的影响程度.对于剪切速率,参数影响程度由大到小的顺序依次为n,Ga和Eo;对于终端速度,Ga对其影响最大,n次之,Eo影响程度最小.

关键词：格子Boltzmann方法气泡动力学剪切增稠流体

维普期刊数据库博看期刊

在线全文

学校读者我要写书评

暂无评论

劳模精神的主体内涵及其新时代延展

毛泽东邓小平理论研究 2024年第4期 32-42,108页

作者：唐梦欣清华大学马克思主义学院

劳模精神是中国共产党团结带领广大人民群众在革命、建设和改革的辉煌历程中形成的伟大精神。准确把握劳模精神内涵实质,要回答劳动模范为何“爱岗敬业、争创一流”、因何“艰苦奋斗、勇于创新”,如何做到“淡泊名利、甘于奉献”等问题... 详细信息

劳模精神是中国共产党团结带领广大人民群众在革命、建设和改革的辉煌历程中形成的伟大精神。准确把握劳模精神内涵实质,要回答劳动模范为何“爱岗敬业、争创一流”、因何“艰苦奋斗、勇于创新”,如何做到“淡泊名利、甘于奉献”等问题。劳模精神继承并超越中国古代劳动者朴素的勤劳美德,体现出现代工人阶级劳动人民在党领导下的敬业奋斗,用社会主义条件下的劳动纪律代替了原始异化劳动,以群体协作注解中国式现代化道路。劳模的外延在实践中扩展,一定程度上模糊了劳模精神与资本伦理的界限,体现出理论与实践、原则与策略的复杂关系。于阶段性限度中认清劳动解放的必然趋势、掌握历史主动,是新时代弘扬劳模精神的题中应有之义。

关键词：劳模精神工人阶级传统美德资本伦理劳动解放

Searching for the light leptophilic gauge boson Zx via four-lepton final states at the CEPC

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第4期48卷 59-67页

作者：岳崇兴李妍钰王美舒羽张欣蒙 Department of Physics Liaoning Normal UniversityDalian 116029China Center for Theoretical and Experimental High Energy Physics Liaoning Normal UniversityDalian 116029China

We investigate the possibility of detecting the leptophilic gauge boson Z_(x) predicted by the U(1)Le−Lμmodel via the processes e+e−→ℓ^(+)ℓ^(−)Z_(x)(Z_(x)→ℓ^(+)ℓ^(−))and e+e−→ℓ^(+)ℓ^(−)Z_(x)(Z_(x)→νℓ¯νℓ)at the Circular Electron Positron Collider(CEPC)with a center of mass energy√s=240 GeV and luminosity L=5.6ab^(−1).We provide the expected sensitivities of the CEPC to the parameter space at the 1σ,2σ,3σ,and 5σlevels.

关键词： light gauge boson Z_(x) U(1)L_(e)-L_(μ)model Circular Electron Positron Collider