检索结果-南通市图书馆

New family of Dirac and Weyl semimetals in XAuTe(X=Na, K,Rb) ternary honeycomb compounds

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

Science China(Physics,Mechanics & Astronomy) 2016年第10期59卷 66-71页

作者： hao sun Jin Zhao International Center for Quantum Design of Functional Materials/Hefei National Laboratory for Physical Sciences at Microscale and Key Laboratory of Strongly-Coupled Quantum Matter Physics Chinese Academy of Sciences and Department of Physics University of Science and Technology of China Synergetic Innovation Center of Quantum Information & Quantum Physics University of Science and Technology of China Department of Physics and Astronomy University of Pittsburgh

We propose a new family of 3D Dirac semimetals based on XAuTe(X = K, Na, Rb) ternary honeycomb compounds, determined based on first-principles calculations, which are shown to be topological Dirac semimetals in which the Dirac points are induced by band inversion. Dirac points with four-fold degeneracy that are protected by C3 rotation symmetry and located on the Γ-A high-symmetry path are found. Through spatial-inversion symmetry breaking, a K(Au0.5 Hg0.5)(Te0.5As0.5) superlattice structure composed of KHgAs and KAuTe compounds is proven to be a Weyl semimetal with type-II Weyl points, which connect electronand hole-like bands. In this superlattice structure, the six pairs of Weyl nodes are distributed along the K-Γ high-symmetry path on the kz = 0 plane. Our research expands the family of topological Dirac and type-II Weyl semimetals.

关键词： Dirac semimetal type-II Weyl semimetal band inversion

The General Compromise Value for Cooperative Games With Transferable Utility

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2023年第1期36卷 375-392页

作者： sun Panfei HOU Dongshuang sun hao School of Mathematics and Statistics Northwestern Polytechnical UniversityXi’an 710101China

The authors introduce the general compromise value for cooperative games with transferable *** respect to a set of potential payoffs of which the maximal and minimal potential payoff vectors are regarded as the upper and lower bounds for players,the unique pre-imputation lying on the straight line segment with these two vectors as the extreme points is defined as the general compromise ***-consistency and maximal proportional property are introduced to characterize the general compromise value.

关键词： Axiomatization compromise value cooperative game solution concept

Highly efficient reduction of aqueous Cr(VI) with novel ZnO/SnS nanocomposites through the piezoelectric effect

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2022年第8期34卷 57-66页

作者： hao sun Soo-Jin Park Department of Chemistry and Chemical Engineering Inha UniversityIncheon 22212South Korea

In this work, novel ZnO/SnS nanocomposites were successfully synthesized via a hydrothermal approach, which is developed for piezoelectric catalytic reduction of hexavalent chromium(Cr(VI)) in an aqueous solution. The constructed ZnO/SnS nanocomposites exhibited higher catalytic efficiency for Cr(VI) reduction under a mechanical force(e.g., ultrasonic vibration) compared to pristine ZnO and SnS. In particular, the ZnO/SnS(with 30 wt.% of SnS) heterojunctions revealed an optimal degradation activity among all the prepared samples, which completely removed the Cr(VI)(20 mg/L) solution within 35 min. Moreover, the piezoelectric catalytic activity of ZnO/SnS remained stable after four consecutive cycling experiments. The results of the morphology observations indicated that the SnS nanoparticles adhere to the surface of the ZnO nanorods. The improved piezoelectric catalytic performance of the ZnO/SnS heterojunctions can be attributed to the formation of an intimate interfacial between ZnO and SnS, which effectively inhibits the electron-hole recombination and speeds up the rate of charge transfer. The study reveals a new design of ZnO/SnS heterojunctions as a high-performance and eco-friendly piezoelectric catalyst and provides a promising strategy for addressing environmental problems and energy crises.

关键词： Cr(VI)reduction ZnO/SnS Piezoelectric effect

Research on the Trajectory Tracking Control of a 6-DOF Manipulator Based on Fully-Actuated System Models

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2022年第2期35卷 641-659页

作者： sun hao HUANG Ling HE Liang School of Automation Harbin University of Science and TechnologyHarbin 150080China School of Software Northwestern Polytechnical UniversityXi’an 710072China

The multi-degree of freedom(muti-DOF)manipulator system is a complex control system with the strong coupling feature and high *** this paper,trajectory tracking control of a six-degree of freedom(6-DOF)manipulator based on fully-actuated system models and a direct parametric method is *** fully-actuated system model of the 6-DOF manipulator is established by using the Denavit Hartenberg(DH)notation and Euler-Lagrange dynamics.A disturbance observer is constructed to solve the nonlinear uncertainties such as unmodeled dynamics and external ***,a controller is designed using the direct parametric method to make the 6-DOF manipulator reach the desired position with high *** that,a switching control strategy is developed to suppress the peak value belonging to the *** results reveal the effect of the proposed control approach.

关键词： Direct parametric approach fully-actuated system manipulator nonlinear disturbance observer trajectory tracking

Carbon-supported CoS_(4)-C single-atom nanozyme for dramatic improvement in CO_(2)electroreduction to HCOOH:A DFT study combined with hybrid solvation model

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2023年第8期34卷 449-453页

作者： hao sun Jingyao Liu Institute of Theoretical Chemistry College of ChemistryJilin UniversityChangchun 130023China

Single-atom nanozymes(SANs)have attracted extensive attention due to their characteristics of both single-atom catalysts(SACs)and *** spin-polarized density functional theory(DFT)calculations combined with the hybrid solvation model,this work designed a series of carbon-supported Group VIII transition metals TMS_(4)-C SANs,similar to the TMS_(4)active center of formate dehydrogenase(FADH),aiming to develop highly efficient SANs for CO_(2)*** calculations show that compared with TMN4-C,TMS_(4)-C have FADH-like feature,which can selectively reduce CO_(2)to formic ***,CoS4-C is the most promising SAN for CO_(2)reduction,with a low limiting potential of-0.07 V,which exceeds most reported *** descriptors of TMX4-C(X=N,S)based on intrinsic and electronic structure properties were proposed to shed light on the origin activity of *** findings presented here will provide new insights into the design of novel enzyme-like catalysts for electrochemical CO_(2)reduction.

关键词： Single-atom catalysts Nanozymes Electrocatalysis CO_(2)reduction Density functional theory

Photonics Research Interview with Professor Connie Chang-Hasnain

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2024年第10期12卷 2288-2292页

作者： hao sun Department of Electronic Engineering Tsinghua UniversityBeijing 100084China

The third interview for a Photonics Research webinar series took place on 15 November *** Research Assistant Editor,*** sun,interviewed her PhD advisor,*** Chang-Hasnain,University of California,Berkeley,United States and Berxel Photonics,*** is a world-renowned scientist in the field of semiconductor *** accomplishments have been documented by numerous awards and *** addition to being a faculty member for over 25 years at the University of California,Berkeley,giving guidance and advice to students and young researchers,she is also a community leader,serving as Editor-in-Chief for the Journal of Lightwave Technology,from 2007 to 2012,and the former President of Optica,and is also an entrepreneur,starting a couple of companies.

关键词： Berkeley companies Photonics

水库移民安置公众参与有效性影响因素分析及提升策略研究

在线全文

学校读者我要写书评

暂无评论

水利规划与设计 2025年第1期 101-109页

作者：孙浩许桂生陈东明华北电力大学水利与水电工程学院北京102206

水库移民安置公众参与有效性对于保障移民权益,完善基层民主建设具有重要意义。采用FISM-MICMAC法和DANP法解析水库移民安置公众参与有效性影响因素作用路径,识别关键因素及其权重。结果表明:影响因素分为7个原因因素和8个结果因素,作... 详细信息

水库移民安置公众参与有效性对于保障移民权益,完善基层民主建设具有重要意义。采用FISM-MICMAC法和DANP法解析水库移民安置公众参与有效性影响因素作用路径,识别关键因素及其权重。结果表明:影响因素分为7个原因因素和8个结果因素,作用路径划分为3层,政策法规完善程度、移民文化程度和移民工作人员职业素养原因度位居前3,为深层因素,通过影响大众媒体关注程度等中间因素进而影响表层因素。基于影响因素间相互作用分析,对水库移民安置公众参与有效性提升策略进行讨论,为优化其机制提供参考。

关键词：公众参与水库移民影响因素 FISM-MICMAC DANP

Shear and extensional rheology of entangled polymer melts: Similarities and differences

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2012年第5期55卷 779-786页

作者： sun hao WANG Shi-Qing Department of Polymer Science University of Akron Akron Ohio 44325-3909 USA

This work extends our previous understanding concerning the nonlinear responses of entangled polymer solutions and melts to large external deformation in both simple shear and uniaxial extension. Many similarities have recently been identified for both step strain and startup continuous deformation, including elastic yielding, i.e., chain disentanglement after cessation of shear or extension, and emergence of a yield point during startup deformation that involves a deformation rate in excess of the dominant molecular relaxation rate. At a sufficiently high constant Hencky rate, uniaxial extension of an entangled melt is known to produce window-glass-like rupture. The present study provides evidence against the speculation that chain entanglements tie up into "dead knots" in constant-rate extension because of the exponentially growing chain stretching with time. In particular, it is shown that even Instron-style tensile stretching, i.e., extending a specimen by applying a constant velocity on both ends, results in rupture. Yet, in the same rate range, the same entangled melt only yields in simple shear, and the resulting shear banding is clearly not a characteristic of rupture. Thus, we conclude that chain entanglements respond to simple shear in the manner of yielding whereas uniaxial extension is rather effective in causing some entanglements to lock up, making it impossible for the entanglement network to yield at high rates.

关键词： entangled polymer melt shear and extensional deformation yielding disentanglement chain scission failure strain localization

Progress on Regulation of NLRP3 Inflammasome by Chinese Medicine in Treatment of Ulcerative Colitis

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2023年第8期29卷 750-760页

作者： sun hao-xian ZHU Ying Department of Gastroenterology the First Affiliated Hospital of Hunan University of Chinese MedicineChangsha(410007)China Hunan University of Chinese Medicine Changsha(410208)China

Ulcerative colitis(UC)is a chronic,non-specific intestinal disease that not only affects the quality of life of patients and their families but also increases the risk of colorectal *** nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing protein 3(NLRP3)inflammasome is an important component of inflammatory response system,and its activation induces an inflammatory cascade response that is involved in the development and progression of UC by releasing inflammatory cytokines,damaging intestinal epithelial cells,and disrupting the intestinal mucosal *** medicine(CM)plays a vital role in the prevention and treatment of UC and is able to regulate NLRP3 *** experimental studies on the regulation of NLRP3 inflammasome mediated by CM have been carried out,demonstrating that CM formulae with main effects of clearing heat,detoxifying toxicity,drying dampness,and activating blood *** and phenylpropanoids can effectively regulate NLRP3 *** active components of CM can interfere with the process of NLRP3 inflammasome assembly and activation,leading to a reduction in inflammation and UC ***,the reports are relatively scattered and lack systematic *** paper reviews the latest findings regarding the NLRP3 inflammasome activation-related pathways associated with UC and the potential of CM in treating UC through modulation of NLRP3 *** purpose of this review is to explore the possible pathological mechanisms of UC and suggest new directions for development of therapeutic tools.

关键词： NLRP3 inflammasome ulcerative colitis Chinese medicine mechanism of action review