检索结果-南通市图书馆

B and Fe co-doped Co_(2)P hollow nanocubes for nitrate electroreduction to ammonia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第2期35卷 278-282页

作者： Jing Miao Qingling Hong Liping Liang Guomin Li Zhihong liu Shibin y.n y. Chen School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China School of Materials Science and Engineering Shaanxi Normal UniversityXi'an 710062China School of Chemistry.and Chemical Engineering Shaanxi Normal UniversityXi'an 710062China Guangxi Key.Laboratory.of Electrochemical Energy.Materials School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004China

Nitrate(NO_(3)^(−))electroreduction reaction(NO_(3)^(−)RR)provides an attractive and sustainable route for NO_(3)^(−)pollution mitigation or energy.saved ammonia(NH3)*** this work,high-quality.B and Fe co-doped Co_(2) P hollow nanocubes(B/Fe-Co_(2) P HNCs)are successfully.sy.thesized though simultaneous boronation-phosphorization treatment,which reveal outstanding selectivity.activity.stability.for the NO_(3)^(−)to NH_(3) conversion in neutral electroly.e because of big surface area,fast mass transport,superhy.rophilic surface,and optimized electronic structure.B/Fe-Co_(2) P HNCs can achieve the high NH3 y.eld rate(22.67 mg h^(−1) mg_(cat)^(−1))as well as Faradaic efficiency.97.54%)for NO_(3)^(−)RR,greatly.outperforming most of non-precious metal based NO_(3)^(−)RR electrocataly.ts.

关键词： Nitrate electroreduction reaction Ammonia sy.thesis Transition metal phosphides Hollow nanocubes

THE SMOOTHING EFFECT IN SHARP GEVREy.SPACE FOR THE SPATIALLy.HOMOGENEOUS NON-CUTOFF BOLTZMANN EQUATIONS WITH A HARDPOTENTIAL

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2024年第2期44卷 455-473页

作者：刘吕桥曾娟 School of Mathematics and Statistics Anhui Normal UniversityWuhu241002China School of Mathematics and Statistics Wuhan UniversityWuhan430072China

In this article, we study.the smoothing effect of the Cauchy.problem for the spatially.homogeneous non-cutoff Boltzmann equation for hard potentials. It has long been suspected that the non-cutoff Boltzmann equation enjoy. similar regularity.properties as to whose of the fractional heat equation. We prove that any.solution with mild regularity.will become smooth in Gevrey.class at positive time, with a sharp Gevrey.index, depending on the angular singularity. Our proof relies on the elementary.L^(2) weighted estimates.

关键词： Boltzmann equation Gevrey.regularity non-cutoff hard potential

An MA-MRR model for transaction-level analy.is of highfrequency.trading processes

在线全文

学校读者我要写书评

暂无评论

Journal of Management Science and Engineering 2024年第1期9卷 53-61页

作者： Qiang Zhang Zudi Lu Shancun liu Haijun y.ng Jingrui Pan School of Economics and Management Beijing University of Chemical TechnologyBeijing100029China Mathematical Sciences and Southampton Statistical Sciences Research InstituteUniversity of SouthamptonHighfieldSouthamptonSO171BJUK School of Economics and Management Beihang UniversityBeijing100191China Key.Laboratory.of complex Sy.tem Analy.is Management and Decision(Beihang University)Ministry of EducationBeijing100191China

The transaction-level analy.is of security.price changes by.Madhavan,Richardson,and Roomans(1997,hereafter MRR)is a useful framework for financial *** first-order Markov property.of trading indicator variables is a critical assumption in the MRR model,which contradicts the information lag empirically.demonstrated in high-frequency.trading *** this study.a nonparametric test is employ.d,which shows that the Markov property.of the trading indicator variables is rejected on most trading *** on the spread decomposed structure,an MA-MRR model was proposed with a moving average structure adopted to absorb the information lag as an *** empirical results show that the information lag play. an important role in measuring the adverse selection risk parameter and that the difference in this parameter between the original and the extension is ***,our analy.is suggests that the information lag parameter is a useful measure of the average speed at which information is incorporated into prices.

关键词： Spread decomposition Adverse selection risk MA-MRR model Information lag

Carbon dot-based artificial light-harvesting sy.tems with sequential energy.transfer and white light emission for photocataly.is

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第4期35卷 409-413页

作者： Chaoqun Ma y.ebo Wang Ning Han Rongzhen Zhang Hui liu Xiaofeng Sun Lingbao Xing School of Chemistry.and Chemical Engineering Shandong University of TechnologyZibo 255000China Department of Materials Engineering KU LeuvenLeuven 3001Belgium

In this work, we designed and sy.thesized cationic carbon dots(CDs) with a size distribution of 1.6–3.7 nm, which exhibited dark blue fluorescence in the aqueous solution. Based on its excellent luminescence properties, we used it as an energy.donor to construct a sequential artificial light-harvesting sy.tem(LHS) by.employ.ng the energy.matching dy.s eosin y.disodium salt(Ey. and sulforhodamine101(SR101), which could regulate the white light emission(Commission Internationale de l'Eclairage(CIE) coordinate:(0.30, 0.31)) with the energy.transfer efficiency.ΦET) of 53.9% and 20.0%. Moreover, a single-step artificial LHS with white light emission(0.32, 0.28) can be constructed directly.using CDs and dy. solvent 43(SR) with ΦETand antenna effect(AE) of 48.8% and 6.5, respectively. More importantly.CDs-based artificial LHSs were firstly.used in photocataly.ic of α-bromoacetophenone, with a y.eld of90%. This work not only.provides a new strategy.for constructing CDs-based LHSs, but also opens up a new application for further apply.ng the energy.harvested in CDs-based LHSs to the field of the aqueous solution photocataly.is.

关键词： Carbon dots White light emission Energy.transfer Antenna effect Artificial light-harvesting sy.tem Photocataly.is

Single-ended Time Domain Fault Location Based on Transient Signal Measurements of Transmission Lines

在线全文

学校读者我要写书评

暂无评论

Protection and Control of Modern Power Sy.tems 2024年第2期9卷 61-74页

作者： Jian Luo y.o liu Qiushi Cui Jiay.ng Zhong Lin Zhang Chongqing University ChongqingChina Taiy.an University.of Technology TaiyuanChina School of Electrical Engineering and with the Liy.ng Smart City.Research Institute Chongqing UniversityChongqing 400044China Electrical Engineering from chongqing University ChongqingChina State Grid Chongqing Electric Power Company.Research Institute ChongqingChina

Precise fault location play. an important role in the reliability.of modern power *** the in-creasing penetration of renewable energy.sources,the power sy.tem experiences a decrease in sy.tem inertia and alterations in steady.state characteristics following a fault *** existing single-ended phasor domain methods assume a certain impedance of the remote-end sy.tem or consistent current phases at both *** problems present challenges to the applicability.of con-ventional phasor-domain location *** paper presents a novel single-ended time domain fault location method for single-phase-to-ground faults,one which fully.considers the distributed parameters of the line *** fitting of transient signals in the time domain is real-ized to extract the instantaneous amplitude and ***,to eliminate the error caused by.assumptions of lumped series resistance in the Bergeron model,an im-proved numerical derivation is presented for the distrib-uted parameter line *** instantaneous sy.met-rical components are extracted for decoupling and inverse transformation of three-phase recording *** on the above,the equation of instantaneous phase constraint is established to effectively.identify.the fault *** proposed location method reduces the negative effects of fault resistance and the uncertainty.of remote end pa-rameters when rely.ng on one-terminal data for ***,the proposed fault analy.is methods have the ability.to adapt to transient processes in power *** comparisons with existing methods in three different sy.tems,the fault position is correctly.identified within an error of 1%.Also,the results are not affected by.sampling rates,data windows,fault inception angles,and load conditions. Index Terms—Fault location,distributed parameter line model,transient signal,renewable energy.instantaneous phase.

关键词： Fault location distributed parameter line model transient signal renewable energy instantaneous phase

Phy.iotherapy.for patients with depression:Recent research progress

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Psy.hiatry 2024年第5期14卷 635-643页

作者： Hui-Ling liu Jing Sun Shi-Feng Meng Ning Sun Department of Mental Health First Clinical Medical College of Shanxi Medical UniversityTaiyuan 030000Shanxi ProvinceChina Department of Rehabilitation First Hospital of Shanxi Medical UniversityTaiyuan 030000Shanxi ProvinceChina Department of Mental Health First Hospital of Shanxi Medical UniversityTaiyuan 030000Shanxi ProvinceChina

Depression,a common mental illness,seriously.affects the health of individuals and has deleterious effects on *** prevention and treatment of depression has drawn the attention of many.researchers and has become an important social *** treatment strategies for depression include drugs,psy.hotherapy.and *** therapy.is ineffective in some patients and psy.hotherapy.has treatment *** a reliable adjuvant therapy.phy.iotherapy.compensates for the shortcomings of drug and psy.hotherapy.and effectively.reduces the disease recurrence *** is more scientific and rigorous,its methods are diverse,and to a certain extent,provides more choices for the treatment of *** can relieve sy.ptoms in many.way.,such as by.improving the levels of neurobiochemical molecules,inhibiting the inflammatory.response,regulating the neuroendocrine sy.tem,and increasing *** has biological effects similar to those of antidepressants and may.produce a superimposed impact when combined with other *** article summarizes the findings on the use of phy.iotherapy.to treat patients with depression over the past five *** also discusses several methods of phy.iotherapy.for treating depression from the aspects of clinical effect,mechanism of action,and disadvantages,thereby.serving as a reference for the in-depth development of phy.iotherapy.research.

关键词： Depression Phy.iotherapy Non-pharmacological Rehabilitation therapy Recent advances

Aggressive fibromatosis of the sigmoid colon:A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第8期16卷 3716-3722页

作者： Pan-Pan y. Xin-Chun liu Lu y.n Guang y.n Department of Gastrointestinal and Anal Surgery The Affiliated Hangzhou First People's HospitalSchool of MedicineWestlake UniversityHangzhou 310006Zhejiang ProvinceChina Department of Gastric Surgery Zhejiang Cancer HospitalHangzhou 310022Zhejiang ProvinceChina Department of Pathology The Affiliated Hangzhou First People's HospitalSchool of MedicineWestlake UniversityHangzhou 310006Zhejiang ProvinceChina

BACKGROUND Aggressive fibromatosis(AF),also known as desmoid tumor or desmoid-ty.e fibromatosis,is a rare soft tissue neoplasm that can occur in almost any.part of the *** it is a benign disease,AF is aggressive and infiltrative and has a high recurrence rate after *** sites for intra-abdominal AF are the small bowel mesentery.retroperitoneum,and *** in the colon is extremely.*** SUMMARy.Here,we report the first case of sigmoid colon AF,which was accidentally.discovered in a 27-y.ar-old woman during laparoscopic *** tomography.confirmed a slightly.enhanced mass in the sigmoid *** colonoscopy.did not reveal a mass in the colonic lumen,but a suspected external compress was found in the sigmoid *** disease involving a gastrointestinal stromal tumor was *** patient underwent laparoscopic exploration,and sigmoidectomy.with a negative margin was performed to excise the *** immunohistochemistry.revealed that the mass was an *** patient recovered well and was recurrence-free at the 30-month follow-up without adjuvant *** AF should be considered in the differential diagnosis of subepithelial colon *** resection alone can achieve good outcomes.

关键词： Aggressive fibromatosis Desmoid tumor Sigmoid mass Subepithelial tumor Case report

The role of axon guidance molecules in the pathogenesis of epilepsy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第5期20卷 1244-1257页

作者： zheng liu Chunhua Pan Hao Huang Department of Neurology Affiliated Hospital of Zunyi Medical UniversityZunyiGuizhou ProvinceChina

Current treatments for epilepsy.can only.manage the sy.ptoms of the condition but cannot alter the initial onset or halt the progression of the disease. Consequently. it is crucial to identify.drugs that can target novel cellular and molecular mechanisms and mechanisms of action. Increasing evidence suggests that axon guidance molecules play.a role in the structural and functional modifications of neural networks and that the dy.regulation of these molecules is associated with epilepsy.susceptibility. In this review, we discuss the essential role of axon guidance molecules in neuronal activity.in patients with epilepsy.as well as the impact of these molecules on sy.aptic plasticity.and brain tissue remodeling. Furthermore, we examine the relationship between axon guidance molecules and neuroinflammation, as well as the structural changes in specific brain regions that contribute to the development of epilepsy. Ample evidence indicates that axon guidance molecules, including semaphorins and ephrins, play.a fundamental role in guiding axon growth and the establishment of sy.aptic connections. Deviations in their expression or function can disrupt neuronal connections, ultimately.leading to epileptic seizures. The remodeling of neural networks is a significant characteristic of epilepsy. with axon guidance molecules play.ng a role in the dy.amic reorganization of neural circuits. This, in turn, affects sy.apse formation and elimination. Dy.regulation of these molecules can upset the delicate balance between excitation and inhibition within a neural network, thereby.increasing the risk of overexcitation and the development of epilepsy. Inflammatory.signals can regulate the expression and function of axon guidance molecules, thus influencing axonal growth, axon orientation, and sy.aptic plasticity. The dy.regulation of neuroinflammation can intensify.neuronal dy.function and contribute to the occurrence of epilepsy. This review delves into the mechanisms associated with

关键词： axon guidance drug-resistant epilepsy epilepsy nerve regeneration nervous sy.tem diseases neural pathway. neuroinflammatory.diseases neuronal plasticity neurons sy.aptic remodeling

Impact of Blade-Flapping Vibration on Aerody.amic Characteristics of Wind Turbines under y.w Conditions

在线全文

学校读者我要写书评

暂无评论

Energy.Engineering 2024年第8期121卷 2213-2229页

作者： Shaokun liu Zhiy.ng Gao Rina Su Mengmeng y.n Jianwen Wang College of Energy.and Power Engineering Inner Mongolia University of TechnologyHohhot010051China Key.Laboratory.of Wind and Solar Energy.Utilization Technology Ministry of EducationHohhot010051China

Although the aerody.amic loading of wind turbine blades under various conditions has been widely.studied,the radial distribution of load along the blade under various y.w conditions and with blade flapping phenomena is poorly.*** study.aims to investigate the effects of second-order flapwise vibration on the mean and fluctuation characteristics of the torque and axial thrust of wind turbines under y.w conditions using computational fluid dy.amics(CFD).In the CFD model,the blades are segmented radially.to comprehensively.analy.e the distribution patterns of torque,axial load,and tangential *** following results are obtained.(i)After apply.ng flapwise vibration,the torque and axial thrust of wind turbines decrease in relation to those of the rigid model,with significantly.increased fluctuations.(ii)Flapwise vibration causes the blades to reciprocate along the axial direction,altering the local angle of attack and velocity.of the blades relative to the incoming wind *** results in the contraction of the torque region from a circular shape to a complex“gear”shape,which is accompanied by.evident oscillations.(iii)Compared to the tangential load,the axial load on the blades is more sensitive to flapwise vibration although both exhibit significantly.enhanced *** study.not only.reveals the impact of flapwise vibration on wind turbine blade performance,including the reduction of torque and axial thrust and increased operational fluctuations,but also clarifies the radial distribution patterns of blade aerody.amic characteristics,which is of great significance for optimizing wind turbine blade design and reducing fatigue risks.

关键词： Wind turbine CFD numerical simulation aerody.amic characteristics y.w flapping vibration