检索结果-南通市图书馆

Randomness and Nonlinear Evolution Equations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2019年第6期35卷 903-932页

作者： Andrea R.NAHMOD Gigliola STAFFILANI Department of Mathematics University of Massachusetts Amherst Department of Mathematics Massachusetts Institute of Technology

In this paper we survey some results on existence, and when possible also uniqueness, of solutions to certain evolution equations obtained by injecting randomness either on the set of initial data or as a perturbative... 详细信息

关键词： Probabilistic well-posedness Gibbs measure invariance

Catalytic activity correlation of Ni(Ⅱ),Co(Ⅱ) and Pd(Ⅱ) complexes to metal atom net charge

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

Science China Chemistry 2009年第1期52卷 48-55页

作者： HSU Shaw Ling Department of Polymer Science and Engineering University of Massachusetts Amherst

The metal atom net charge correlation(MANCC) method was developed in prediction of catalyst activity of asymmetric late-transition metal complexes,2-quinoxalinyl-6-iminopyridine Ni(Ⅱ),2-imino-1,10-phenanthroline Co(Ⅱ) and 2-methoxycarbonyl-6-iminopyridine Pd(Ⅱ) complexes,from the net charge of the metal atom for ethylene *** force field was modified according to the X-ray diffraction *** found that the asymmetric structure of the complexes resulted in a charge differ-ence between two halogen atoms coordinated to the metal *** order to remove such contribution we introduced the effective charge Qeff,which was obtained by the charge equilibration(QEq) *** results verified the successful introduction of Qeff and showed that the catalytic activities of different complexes are related to central metal atom effective charge.

关键词： asymmetric catalyst effective charge force field MANCC QEq

The landscape of epigenetic regulation and therapeutic application of N^(6)-methyladenosine modifications in non-coding RNAs

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

Genes & Diseases 2024年第5期11卷 236-251页

作者： Gui-e Xu Xuan Zhao Guoping Li Priyanka Gokulnath Lijun Wang Junjie Xiao Institute of Geriatrics(Shanghai university) Affiliated Nantong Hospital of Shanghai University(The Sixth People’s Hospital of Nantong)and School of Life SciencesShanghai UniversityNantongJiangsu 226011China Cardiac Regeneration and Ageing Lab Institute of Cardiovascular SciencesShanghai Engineering Research Center of Organ RepairSchool of Life ScienceShanghai UniversityShanghai 200444China Cardiovascular Division of the massachusetts General Hospital and Harvard Medical School BostonMA 02114USA

RNA N^(6)-methyladenosine(m^(6)A)methylation is the most abundant and conserved RNA modification in *** participates in the regulation of RNA metabolism and various pathophysiological ***-coding RNAs(ncRNAs)are defined as small or long transcripts which do not encode proteins and display numerous biological regulatory *** to mRNAs,m^(6)A deposition is observed in *** RNA m^(6)A modifications on ncRNAs is of great importance specifically to deepen our understanding of their biological roles and clinical *** this review,we summarized the recent research findings regarding the mutual regulation between RNA m^(6)A modification and ncRNAs(with a specific focus on microRNAs,long non-coding RNAs,and circular RNAs)and their *** also discussed the challenges of m^(6)A-containing ncRNAs and RNA m^(6)A as therapeutic targets in human diseases and their future perspective in translational roles.

关键词： Circular RNA Epigenetic regulation Long non-coding RNA MicroRNA Non-coding RNA RNA m^(6)A modification

Connections between biomechanics and higher infectivity: a tale of the D614G mutation in the SARS-CoV-2 spike protein

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2021年第2期6卷 193-194页

作者： Anshumali Mittal Vikash Verma Luxmi Nagar JaspurUttarakhandIndiaUniversity of MassachusettsAmherstMAUSA Biology Department University of MassachusettsAmherstMAUSA

Mutations are known to play a critical role in how a species *** a recent article that appeared in the journal Cell,Yurkovetskiy et al.1 reported the structural and functional properties of the SARS-CoV-2 spike protein variant D614G that explains the basis of its increased *** observed that the mutant(D614G)was 4 to 9-fold more infectious than the wild type(D614),and the increased infectivity was not limited to human angiotensin-converting enzyme 2(ACE2).1 The cryo-EM structure suggested that D614G mutation weakens the stability of the homotrimer that shifts protein conformation towards an ACE2-binding fusion-competent state.1 The authors additionally showed that the D614G variant is neutralized by monoclonal antibodies targeting the spike protein receptor-binding domain(RBD).

关键词： ACE2 al. D61

Evolutionarily conserved mechanosensor PIEZO in land plants

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2021年第11期14卷 1783-1784页

作者： M.Arif Ashraf Department of Biology University of Massachusetts AmherstAmherstMAUSA

Mechanosensing is one of the fundamental cellular processes that helps cells respond to universal stimuli such as light,touch,gravity,and *** are the most well-characterized mechanosensors in mammals and can be activated by applying pressure from either a patch-clamp recording pipette or a blunt glass pipette,as the Greek word piezo means *** activation,the PIEZO channel facilitates the entry of Ca2+inside the cell(Figure 1)。

关键词： Figure patch recording

Muscular activity patterns in 1-legged vs. 2-legged pedaling

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 Sport and Health Science 2021年第1期10卷 99-106页

作者： Sangsoo Park Graham E.Caldwell Department of Kinesiology University of Massachusetts AmherstAmherstMA 01003USA

Background:One-legged pedaling is of interest to elite cyclists and ***,muscular usage in 1-legged vs.2-legged pedaling is not fully ***,the study was aimed to examine changes in leg muscle activation patterns between 2-legged and 1-legged ***:Fifteen healthy young recreational cyclists performed both 1-legged and 2-legged pedaling trials at about 30 Watt per *** electromyography electrodes were placed on 10 major muscles of the left *** envelope electromyography data were integrated to quantify muscle activities for each crank cycle quadrant to evaluate muscle activation ***:Overall,the prescribed constant power requirements led to reduced downstroke crank torque and extension-related muscle activities(vastus lateralis,vastus medialis,and soleus)in 1-legged ***-related muscle activities(biceps femoris long head,semitendinosus,lateral gastrocnemius,medial gastrocnemius,tensor fasciae latae,and tibialis anterior)in the upstroke phase increased to compensate for the absence of contralateral leg crank *** the upstroke,simultaneous increases were seen in the hamstrings and uni-articular knee extensors,and in the ankle plantarflexors and *** the top of the crank cycle,greater hip flexor activity stabilized the ***:The observed changes in muscle activities are due to a variety of changes in mechanical aspects of the pedaling motion when pedaling with only 1 leg,including altered crank torque patterns without the contralateral leg,reduced pelvis stability,and increased knee and ankle stiffness during the upstroke.

关键词： Electromyography Muscle activity One-leg Pedaling

Remote electric powering by germanium photovoltaic conversion of an Erbium-fiber laser beam

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

Chip 2024年第3期3卷 15-20页

作者： Richard Soref Francesco De Leonardis Oussama Moutanabbir Gerard Daligou Engineering Department University of Massachusetts at BostonBostonMA 02125USA Department of Electrical and Information Engineering Politecnico di BariBari 70121-70132Italy Department of Engineering Physics Ecole Polytechnique de MontrealMontrealQuebec 999040Canada

The commercially available 4000-Watt continuous-wave(CW)Erbium-doped-fiber laser,emitting at the 1567-nm wavelength where the atmosphere has high transmission,provides an opportunity for harvesting electric power at remote“off the grid”locations using a multi-module photovoltaic(PV)“receiver”*** paper proposes a 32-element monocrystalline thick-layer Germanium PV panel for efficient harvesting of a collimated 1.13-m-diam *** 0.78-m^(2) PV panel is constructed from commercial Ge *** incident CW laser-beam power in the 4000 to 10,000 W range,our thermal,electrical,and infrared simulations predict 660 to 1510 Watts of electrical output at the panel temperatures of 350 to 423 K.

关键词： Laser power transmission Photovoltaic panels Germa-nium infrared detection Erbiumﬁber laser Ytterbiumﬁber laser Directed-beam energy harvesting

Improving hydrogen evolution reaction efficiency through lattice tuning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第7期17卷 5907-5913页

作者： Zipeng Zhao Haotian Liu Wenpei Gao Praveen Kolla Wang Xue Zeyan Liu Jinghua Guo Sanjeev Mukerjee Xiaoqing Pan Qingying Jia Xiangfeng Duan Yu Huang Department of Materials Science and Engineering University of CaliforniaLos AngelesCalifornia 90095USA Department of Chemical Engineering and Materials Science University of CaliforniaIrvineCalifornia 92697USA Materials Science and Engineering North Carolina State UniversityRaleighNorth Carolina 27695USA Department of Chemistry and Chemical Biology Northeastern UniversityBostonMassachusetts 02115USA Department of Chemistry and Biochemistry University of CaliforniaLos AngelesCalifornia 90095USA Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCalifornia 94720USA Department of Chemistry and Biochemistry University of CaliforniaSanta CruzCalifornia 95064USA Department of Physics and Astronomy University of CaliforniaIrvineCalifornia 92697USA California Nanosystems Institute University of CaliforniaLos AngelesCalifornia 90095USA

The intermittent nature of renewable energy sources sets a requirement for efficient energy storage to mitigate the conflict between energy supply and *** is a promising choice for energy storage due to its high energy ***,the conversion of electrical energy to chemical energy stored in hydrogen through water electrolysis suffers from low efficiency,and the electricity cost dominates the total cost of hydrogen ***,we report the study of improving the hydrogen evolution reaction activity of Pt-based catalysts by building a nanoscale surface NiO and Pt interface,further optimizing the performance via tuning the lattice parameter of the core of nanoparticles,which can be achieved by varying the dealloying annealing *** optimized PtCuNi-O/C and PtNi-O/C catalysts are demonstrated to be one of the best catalysts,with a mass activity(MA)of 9.1 and 8.7 mA/μgPt,which is 9.9-fold and 9.5-fold of that of Pt/C,respectively.

关键词： lattice tuning Pt-based catalyst hydrogen evolution reaction electrocatalysis

A novel intelligent vehicle risk assessment method combined with multi-sensor fusion in dense traffic environment

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 Intelligent and Connected Vehicles 2018年第2期1卷 41-54页

作者： Xunjia Zheng Bin Huang Daiheng Ni Qing Xu Tsinghua university BeijingChina Department of Civil and Environmental Engineering Amherst College of EngineeringUniversity of MassachusettsAmherstMassachusettsUSA

Purpose–The purpose of this paper is to accurately capture the risks which are caused by each road user in ***/methodology/approach–The authors proposed a novel risk assessment approach based on the multi-sensor fusion algorithm in the real trafﬁc ***,they proposed a novel detection-level fusion approach for multi-object perception in dense trafﬁc environment based on evidence *** approach integrated four states of track life into a generic fusion framework to improve the performance of multi-object *** information of object type,position and velocity was accurately ***,they conducted several experiments in real dense trafﬁc environment on highways and urban roads,which enabled them to propose a novel road trafﬁc risk modeling approach based on the dynamic analysis of vehicles in a variety of driving *** analyzing the generation process of trafﬁc risks between vehicles and the road environment,the equivalent forces of vehicle–vehicle and vehicle–road were presented and theoretically *** prediction steering angle and trajectory were considered in the determination of trafﬁc risk inﬂuence ***–The results of multi-object perception in the experiments showed that the proposed fusion approach achieved low false and missing tracking,and the road trafﬁc risk was described as aﬁeld of equivalent *** results extend the understanding of the trafﬁc risk,which supported that the trafﬁc risk from the front and back of the vehicle can be perceived in ***/value–This approach integrated four states of track life into a generic fusion framework to improve the performance of multi-object *** information of object type,position and velocity was used to reduce erroneous data association between tracks and ***,the authors conducted several experiments in real dense trafﬁc environment on highways and urban roads,which enabled them to propose a novel road trafﬁc

关键词： Automated vehicles Advanced vehicle safety systems Autonomous driving Connected vehicles Environment perception Sensor information fusion