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Triangle singularity enhancing is.s.in violation in B^0_s→ J/ψπ~0f_0(980)

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Chinese Physics C 2018年第4期42卷 157-165页

作者： Wei-Hong Liang s. sakai Ju-Jun xie E. Oset Department of Physics Guangxi Normal University Guilin 541004 China Departamento de Física Teórica and IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna Aptdo. 22085 46071 Valencia Spain Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China

We perform calculations for the Bs0→ J/ψπ0f0（980） and Bs0 → J/ψπ0a0（980） reactions, showing that the first is is.s.in-suppressed while the second is is.s.in-allowed. The reaction proceeds via a triangle mechanism, with Bs0 →J/ψK＊ K ＋c.c., followed by the decay K＊ →Kπ and a further fusion of KK into the f0（980） or a0（980）. We show that the mechanism develops a singularity around the π0 f0（980） or π0a0（980） invariant mass of 1420 MeV, where the π0f0 and π0a0 decay modes are magnified and also the ratio of π0f0 to π0a0 production. Using experimental information for the Bs0 → J/ψK＊K ＋c.c. decay, we are able to obtain absolute values for the reactions.s.udied which fall into the experimentally accessible range. The reactions proposed and the observables evaluated, when contrasted with actual experiments, should be very valuable to obtain information on the nature of the low lying scalar mesons.

关键词： triangle singularity light scalar meson is.s.in violation bottom meson decay

Mechanistic investigation on Ce addition in tuning recrystallization behavior and mechanical property of Mg alloy

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Journal of Materials.s.ience & Technology 2023年第1期132卷 1-17页

作者： J.R.Li D.s.xie Z.R.Zeng B.song H.B.xie R.s.Pei H.C.Pan Y.P.Ren G.W.Qin Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) College of Materials Science and EngineeringNortheastern UniversityShenyang110819China College of Engineering and Computer science Australian National UniversityACT 2601Australia school of Materials and Energy Southwest UniversityChongqing 400715China Institute for Physical Metallurgy and Materials Physics RWTH Aachen UniversityAachen 52062Germany

Constructing bimodal grain structure is a promising approach to achieve the high strength-ductility syn-ergy in Mg *** of bimodal grain is closely related to the dynamic and/or static recrystal-lization process,which has not been fully understood in the typical Mg-RE based *** this work,it is claimed for the first time that the minor Ce addition(∼0.3 wt%)into Mg matrix significantly pro-motes the pyramidaland non-basaldislocations at the early stage of extrusion,which con-sequently enhances the formation of sub-grain boundaries via the movement and recovery of pyramidal II-type*** this.s.age,fine sub-grain lamellae are widely observed predominantly due to the low migration rate of sub-grain boundary caused by the limited mobility of*** the later stage,the sub-grains continuously transform into dynamic recrystallized(DRXed)grains that have10¯10Taylor axis and also strong fiber texture,indicating substantial activation of pyramidal II-type*** low mobility ofdislocations,accompanied with the solute drag from grain boundary(GB)segregation and pinning from nano-phas.s.cause a sluggish DRX process and thus a bimodal microstructure with ultra-fined DRXed grains,∼0.51μ*** resultant texture hardening and grain refinement hardening effects,originated from bimodal microstructure,result in a yield strength of∼352 MPa,which is exceptional in Mg-Ce dilute *** work clarifies the critical role of Ce addition in tuning recrystallization behavior and mechanical property of magnesium,and can also shed light on designing the other high-performance Mg alloys.

关键词： Mg alloys Recrystallization behavior Mechanical property Pyramidal dislocation Thermal stability

Exploring the region-wise diversity and functions of symbiotic bacteria in the gut s.s.em of wood-feeding termite,Coptotermes formosanus,toward the degradation of cellulose,hemicellulose,and organic dyes

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Insect science 2022年第5期29卷 1414-1432页

作者： Mudasir A.Dar Rongrong xie Radhakrishna s.Pandit Blessing Danso Chenchen Dong Jianzhong sun Biofuels Institute School of the Environment and Safety EngineeringJiangsu UniversityZhenjiangJiangsu ProvinceChina Department of Zoology Savitribai Phule Pune UniversityGaneshkhindPuneIndia

The wood-feeding termite Coptotermes formosanus represents a unique and impressive s.s.em for lignocellulose *** highly efficient digestion of lignocellulose is achieved through symbios.s.with gut symbionts like *** extensive research during the last three decades,diversity of bacterial symbionts residing in individual gut regions of the termite and their associated functions is.s.ill *** this end,cellulose,xylan,and dye-decolorization bacteria residing in foregut,midgut,and hindgut regions of *** were enlisted by using enrichment and culture-dependent molecular methods.A total of 87 bacterial strains were successfully isolated from different gut regions of *** which belonged to 27 different species of 10 genera,majorly affiliated with Proteobacteria(80%)and Firmicutes(18.3%).Among the gut regions,37.9%of the total bacterial isolates were observed in the hindgut that demonstrated predominance of cellulolytic bacteria(47.6%).The majority of the xylanolytic and dye-decolorization bacteria(50%)were obtained from the foregut and midgut,*** represented by Dietza *** observed in the hindgut *** on species richness,the highest diversity was observed in midgut and hindgut regions each of which harbored seven unique bacterial *** members of Enterobacter,Klebsiella,and Pseudomonas were common among the gut *** lignocellulolytic activities of the selected potential bacteria signpost their ass.s.ance to the host for lignocellulose *** overall results indicate that *** harbors diverse communities of lignocellulolytic bacteria in different regions of the gut *** observations will significantly advance our understanding of the termite–bacteria symbios.s.and their microbial ecology uniquely existed in different gut regions of ***,which may further shed a light on its potential values at termite-modeled biotechnology.

关键词： bacterial symbionts Coptotermes formosanus culture-dependent gut regions lignocellulose termite

Global production aspirations and internationalization by state-owned enterpris.s.A Co-evolutionary view of statedriven industrialized economy

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International Journal of Innovation studies 2022年第4期6卷 276-285页

作者： Qingqing Tang En xie K.s.Reddy Business.s.hool University of Shanghai for Science and TechnologyShanghai200093China Advanced Institute of Business Tongji UniversityShanghai200070China school of Management Xi'an Polytechnic UniversityXi'an710043China

The study aims to explore whether internationalization by state-owned enterpris.s.is a curse or blessing in the context of aspirant industrial economies.s.ch as *** do state-owned enterpris.s.global production aspirations.s.ch as outward foreign direct investment,bring into their home country?To answer this question,this.s.udy propos.s.a unique,co-evolutionary perspective of the state-driven industrialized economy by leveraging insights from economic discoveries.s.ch as Adam smith's wealth of nations,David Ricardo's comparative advantage,and Michael Porter's competitive *** view sugges.s.that an outward foreign investment strategy may likely provide state-owned enterpris.s.with access to resources and advanced production technologies,enhance innovation capabilities,gain more competitive advantage,and achieve superior performance,thus leading to spillover effects on their home country's wealth,comparative advantage,and *** study discuss.s.China's grand policies,economic performance,and successful cross-border industrial acquisitions.

关键词： state-owned enterprises Internationalization Outward foreign direct investment Wealth of nations Comparative advantage Competitiveness

sIMULTANEOUsE APPROXIMATION TO A DIFFERENTIABLE FUNCTION AND ITs DERIVATIVEs BY LAGRANGE INTERPOLATING POLYNOMIALs

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Analys.s.in Theory and Applications 1994年第4期10卷 100-109页

作者： T.F.xie s.P.Zhou China Institute of Metrology China Universy of Alberta Canada

This paper establishes the following pointwise result for simultancous Lagrange imterpolating approxima- tion:,then |f^(k)(x)-P_n^(k)(f,x)|=O(1)△_n^(q-k)(x)ω where P_n(f,x)is the Lagrange interpolating potynomial of... 详细信息

关键词： sIMULTANEOUsE APPROXIMATION TO A DIFFERENTIABLE FUNCTION AND ITs DERIVATIVEs BY LAGRANGE INTERPOLATING POLYNOMIALs APPI Zr

基于点云处理的仿人机器人楼梯障碍物识别与剔除方法

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工程科学学报 2025年第2期47卷 339-350页

作者：于乃功谢秋生李洪政北京工业大学信息科学技术学院北京100124 北京市计算智能与智能系统重点实验室北京100124 教育部数字社区工程研究中心北京100124

环境感知对于仿人机器人自主导航和运动规划具有重要研究意义,是实现仿人机器人在复杂环境中进行自主移动进而完成特定任务的基础.在特殊的楼梯场景中仿人机器人环境感知过程面临诸多挑战,楼梯障碍物会破坏阶梯平面特征,导致仿人机器人... 详细信息

环境感知对于仿人机器人自主导航和运动规划具有重要研究意义,是实现仿人机器人在复杂环境中进行自主移动进而完成特定任务的基础.在特殊的楼梯场景中仿人机器人环境感知过程面临诸多挑战,楼梯障碍物会破坏阶梯平面特征,导致仿人机器人获取不准确的楼梯参数而出现踏空、摔跤等问题.本文结合区域生长和平面构造方法识别和剔除楼梯障碍物点云,基于剔除障碍物后的楼梯进行三维参数估计.首先利用相邻点的投影之和最小原理准确完成对楼梯水平面的提取;其次根据区域生长算法判定楼梯障碍物聚类情况,构造平面并分析平面内点数以完成对障碍物点云的快速识别与剔除工作;最后对有障碍物楼梯与剔除障碍物楼梯进行楼梯三维感知实验.实验结果表明,本文剔除楼梯障碍物的平均精度为92.43%,且剔除后的楼梯参数感知误差仅为有障碍物时的0.5倍.总体表明所提算法能提高机器人在复杂楼梯环境中的楼梯参数估计精度,能够有效提高仿人机器人在复杂楼梯环境下的感知能力.

关键词：仿人机器人复杂环境感知楼梯区域生长参数估计

Indo-Western Pacific Ocean Capacitor and Coherent Climate Anomalies in Post-ENsO summer: A Review

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Advances in Atmospheric sciences 2016年第4期33卷 411-432页

作者： shang-Ping xie Yu KOsAKA Yan DU Kaiming HU Jasti s.CHOWDARY Gang HUANG scripps Institution of Oceanography University of California San Diego Physical Oceanography Laboratory Qingdao Collaborative Innovation Center of Marine Science and TechnologyOcean University of China Research Center for Advanced science and Technology University of Tokyo state Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of Sciences state key Laboratory of Numerical Modeling for Atmospheric sciences and Geophysical Fluid Dynamics and Center for Monsoon s.s.em Research Institute of Atmospheric Physics Chinese Academy of Sciences Indian Institute of Tropical Meteorology

ENsO induces coherent climate anomalies over the Indo-western Pacific, but these anomalies outlast ssT anomalies of the equatorial Pacific by a season, with major effects on the Asian summer monsoon. This review provides historical accounts of major milestones and synthesizes recent advances in the endeavor to understand summer variability over the Indo-Northwest Pacific region. specifically, a large-scale anomalous anticyclone （AAC） is a recurrent pattern in post-E1 Nifio summers, spanning the tropical Northwest Pacific and North Indian oceans. Regarding the ocean memory that anchors the summer AAC, competing hypothes.s.emphasize either ssT cooling in the easterly trade wind regime of the Northwest Pacific or ssT warming in the westerly monsoon regime of the North Indian Ocean. Our synthes.s.reveals a coupled ocean- atmosphere mode that builds on both mechanis.s.in a two-stage evolution. In spring, when the northeast trades prevail, the AAC and Northwest Pacific cooling are coupled via wind-evaporation-ssT feedback. The Northwest Pacific cooling pers.s.s to trigger a summer feedback that aris.s.from the interaction of the AAC and North Indian Ocean warming, enabled by the westerly monsoon wind regime. This Indo-western Pacific ocean capacitor （IPOC） effect explains why E1 Nifio stages its last act over the monsoonal Indo-Northwest Pacific and cas.s.the Indian Ocean warming and AAC in leading roles. The IPOC displays interdecadal modulations by the ENsO variance cycle, significantly correlated with ENsO at the turn of the 20th century and after the 1970s, but not in between. Outstanding issues, including future climate projections, are also discussed.

关键词： Indian Ocean western Pacific ocean-atmosphere interaction ENsO Asian monsoon

Using sPOT 5 fusion-ready imagery to detect Chinese tamarisk(saltcedar)with mathematical morphological method

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International Journal of Digital Earth 2014年第3期7卷 217-228页

作者： Q.s.Liu G.H.Liu C.Huang C.J.xie state Key Laboratory of Resources and Environmental Information s.s.em Institute of Geographic Science and Natural Resources ResearchChinese Academy of SciencesBeijingChina

Chinese tamarisk(saltcedar)is a deciduous.s.rub that occurs widely across the Yellow River Delta in *** spatial structure of Chinese tamarisk is believed to have an influence on the landscape and habitats of rare *** this.s.udy,first,Chinese tamarisk is detected using Canny edge detector and mathematical morphological operators based on sPOT 5 fusion-ready *** the numbers,areas,locations,and patch spacing of Chinese tamarisk patches are *** experiments.s.ow that the detection accuracy of Chinese tamarisk patches is about 93.4%after the disconnection of connected *** distribution orientation of about 70%of the patches is approximately *** 91%of the minimum distances among the patches are between 12.5 and 57.5 *** rose graph indicates that the main azimuth between patches is north--northwest,and the second is northeast and *** present study indicates that the integrating Canny edge detector with the algorithms for extracting circular and elliptical objects based on mathematical morphology is.s.mple and effective for detecting Chinese tamarisk patches and is easy to identify the spatial structure of Chinese tamarisk patches,which reduces the time and labor for the visual interpretation of Chinese tamarisk patches.

关键词： sPOT 5 Chinese tamarisk spatial structure mathematical morphology patch

高速公路对绿色经济效率的影响分析--基于产业结构优化视角

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生态经济 2025年第1期41卷 114-122页

作者：樊建强谢靖雯长安大学经济与管理学院陕西西安710064

当前中国高速公路建设布局日趋完善,探究如何发挥其对地区产业结构优化的有力支持,进而助力绿色经济发展转型具有重要意义。论文基于2006—2019年中原城市群27个城市的面板数据,运用超效率sBM模型测算其绿色经济效率,从产业结构优化的... 详细信息

当前中国高速公路建设布局日趋完善,探究如何发挥其对地区产业结构优化的有力支持,进而助力绿色经济发展转型具有重要意义。论文基于2006—2019年中原城市群27个城市的面板数据,运用超效率sBM模型测算其绿色经济效率,从产业结构优化的视角实证分析了高速公路对绿色经济效率的影响,并以产业结构优化为中介与门槛变量,进一步探讨产业结构优化对于高速公路影响绿色经济效率的门槛效应。研究结果表明:中原城市群高速公路与绿色经济效率间呈现先抑制后促进的“U”型关系;产业结构优化在高速公路和绿色经济效率间发挥部分中介作用;产业结构优化存在单一门槛效应,随着产业结构优化水平的提升,高速公路对绿色经济效率由抑制作用转为促进作用。

关键词：绿色经济效率高速公路产业结构优化超效率sBM 中原城市群