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Optical solitons supported by finite waveguide lattices with diffusive nonlocal nonlinearity

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Chinese Physics B 2021年第12期30卷 424-429页

作者： Changming Huang Hanying Deng Liangwei Dong Ce Shang Bo Zhao Qiangbo Suo xiaofang zhou Department of Electronic Information and Physics Changzhi UniversityChangzhi 046011China School of Photoelectric Engineering Guangdong Polytechnic Normal UniversityGuangzhou 510665China Department of Physics Shaanxi University of Science&TechnologyXi’an 710021China King Abdullah University of Science and Technology(KAUST Physical Science and Engineering Division(PSEThuwal 23955-6900Saudi Arabia

We investigate the properties of fundamental,multi-peak,and multi-peaked twisted solitons in three types of finite waveguide lattices imprinted in photorefractive media with asymmetrical diffusion *** opposite soliton selfbending signals are considered for different families of *** thresholdless fundamental and multi-peaked solitons are stable in the low power *** existence domain of two-peaked twisted solitons can be changed by the soliton self-bending *** solitons tend to self-bend toward the waveguide lattice,stable two-peaked twisted solitons can be found in a larger region in the middle of their existence ***-peaked twisted solitons are stable in the lower(upper)cutoff region for a shallow(deep)lattice *** results provide an effective guidance for revealing the soliton characteristics supported by a finite waveguide lattice with diffusive nonlocal nonlinearity.

关键词： optical solitons diffusive nonlocal nonlinearity linear stability analysis

Androgen receptor inhibits the hair follicle induction potential of dermal papilla cells by binding with Tcf4 at the A574 binding site

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Genes & Diseases 2023年第1期10卷 51-54页

作者： Nanlan Yu Tianxing Hu Haichao Yangg Lian Zhang Lin Zhu xiaofang zhou Fei Xiang Xichuan Yang Yuhong Li Department of Dermatology Southwest HospitalArmy Medical UniversityChongqing 400038China Department of Cell Biology Army Medical UniversityChongqing 400038China Institute of Burn Research State Key Laboratory of TraumaBurns and Combined InjurySouthwest HospitalArmy Medical UniversityChongqing 400038China

Androgenic alopecia(AGA)is the most common type of clinical *** receptor(AR)is the most logical candidate gene for regulating the occurrence of *** papilla cells(DPCs)are a special kind of mesenchymal cells,located in the hair bulb of hair *** play a role in maintaining and inducing the periodic cycling of hair follicles,and are considered as a key cell target of androgen in hair follicles.

关键词： clinical hair cycling

Environmental Benefits for Phase-Out HCFC-22 in the Residential Air-Conditioner Sector in China

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Advances in Climate Change Research 2011年第2期2卷 86-92页

作者： Tingting Wan Yanwei Dou Lei Wang Lirong Yang xiaofang zhou Dan Wan Jianxin Hu College of Environmental Science ＆ Engineering Peking University Beijing 100871 China China National Environmental Monitoring Centre Beijing 100012 China China Household Electrical Appliances Association Beijing 100062 China Foreign Economic Cooperation Office Ministry of Environmental Protection Beijing 100035 China

China is the largest producer and consumer of hydrochlorofluorocarbons （HCFCs）, and the production of HCFC-22 accounts for more than 80% of all HCFCs. This paper concentrates on the residential air-conditioner industry and analyzes the environmental benefits of accelerating the phase-out of HCFC-22 in China. According to the comparison of the baseline and phase-out scenarios of HCFC-22, the findings show that using HC-290 （propane） as a refrigerant alternative will directly reduce the greenhouse effect, and indirectly reduce the emission of greenhouse gases due to a reduction in the electricity consumption. The comparison of two scenarios of HC-290 and HFC-410A refrigerant alternatives shows that the use of HC-290 refrigerant will produce significantly higher environmental benefits than the HFC-410A refrigerant.

关键词： HCFC-22 HFC-410A HC-290 residential air-conditioner GWP ODP

Landrace introgression contributed to the recent feralization of weedy rice in East China

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Plant Communications 2024年第11期5卷 1-5页

作者： Min Zhu Kaicheng Yong Kai Xu Jia Cong xiaofang zhou Keyue Liu Xuechen Wang Longjiang Fan Kenneth MOlsen Xuehui Huang Xiaoyi zhou Jie Qiu Shanghai Key Laboratory of Plant Molecular Sciences College of Life SciencesShanghai Normal UniversityShanghai 200234China Crop Production Center Bright Food Group Co.Ltd.Shanghai 224100China Institute of Crop Science&Institute of Bioinformatics College of Agriculture&BiotechnologyZhejiang UniversityHangzhou 310058China Department of Biology Washington University in St.LouisSt.LouisMO 63130USA These authors contributed equally to this article

Dear Editor,Weedy rice(Oryza spp.)is a problematic paddy weed known for traits such as high seed shattering,persistent seed dormancy in the soil seed bank,and robust competitiveness against cultivated varieties,threatening rice production yields worldwide(Nadir et al.,2017).Recent population genomics studies have shown that weedy rice strains around the world have repeatedly and independently evolved from various cultivated ancestors at different times in the history of rice cultivation(Li et al.,2017;Qiu et al.,2017;Sun et al.,2019).This de-domestication(feralization)process involves phenotypic reversions from key domestication traits,such as non-shattering and non-dormant seeds,to more wild-like *** genetic mechanisms appear to underlie the convergent evolution of weedy rice worldwide(Qi et al.,2015;Qiu et al.,2020).While most global weedy rice directly descends from domesticated rice,introgression from wild rice also contributes to its adaptive evolution,particularly in tropical Asia where wild Oryzas occur(Li et al.,2024a).

关键词： spp. weed cultivated

中国乡村旅游地不平衡不充分发展及地域系统类型划分

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地理学报 2024年第2期79卷 515-533页

作者：周晓芳邓俊华南师范大学旅游管理学院广州510006 广东省景区行业协会广州510655

实施乡村振兴战略是解决人民群众日益增长的美好生活需要和不平衡不充分发展之间矛盾的必然要求。掌握乡村旅游地发展现状、格局和过程,了解地域分异机制和类型特点,可为发展乡村旅游、促进乡村振兴提供决策依据和规划指导。本文在梳理... 详细信息

实施乡村振兴战略是解决人民群众日益增长的美好生活需要和不平衡不充分发展之间矛盾的必然要求。掌握乡村旅游地发展现状、格局和过程,了解地域分异机制和类型特点,可为发展乡村旅游、促进乡村振兴提供决策依据和规划指导。本文在梳理乡村旅游地发展4个阶段的基础上,基于农家乐、民宿POI数据和全国休闲农业与乡村旅游示范点、中国美丽休闲乡村、中国乡村旅游重点村名录等,运用GIS空间分析中国乡村旅游地发展不同阶段的格局特点,从人地关系地域系统角度出发对中国乡村旅游地进行地域系统类型划分和分异机制总结。研究发现:(1)中国乡村旅游地呈现不平衡和不充分的发展格局,空间过程遵循核心—边缘和点—轴—面结构到复杂结构的演变规律,除京津、长三角和珠三角较为发达外,中国乡村旅游地发展整体上仍处于第一阶段。(2)中国乡村旅游地域系统可分为3大类共15个基本类型,不同类型区乡村旅游地不平衡、不充分特点不同,地域分异因素各异。自然生态环境本底结构是乡村旅游地域系统形成的基础,社会经济文化是动力,在乡村旅游功能分化作用下中国乡村旅游地呈现依山、傍水、沿路、环城、附景、彰文的地域分布规律,不平衡、不充分发展趋势加剧。(3)乡村旅游地市场化发展加剧了乡村和乡村旅游地域系统的不平衡和不充分,在乡村振兴战略要求下,应支持不发达地区乡村旅游优先发展。

关键词：乡村旅游发展格局地域系统类型中国

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社会-生态系统恢复力的测量方法综述

生态学报 2017年第12期37卷 4278-4288页

作者：周晓芳华南师范大学旅游管理学院广州510631

恢复力和社会-生态系统研究的理论及实践近年来在西方较为流行,然而经过几十年发展,学术界仍旧没有对恢复力的概念达成一致,相应的测量方法更是多种多样。基于恢复力理论对系统相对稳定状态和边界的假设以及恢复力概念3个阶段的演变和... 详细信息

恢复力和社会-生态系统研究的理论及实践近年来在西方较为流行,然而经过几十年发展,学术界仍旧没有对恢复力的概念达成一致,相应的测量方法更是多种多样。基于恢复力理论对系统相对稳定状态和边界的假设以及恢复力概念3个阶段的演变和理论的发展,总结了测量恢复力的5种方法,得出恢复力测量的3个发展现状或趋势:阈值和断裂点方法依旧是量化恢复力的基本方法;恢复力测量从关注时间转向空间,关注生态转向社会和社会-生态;复杂学和多学科融合的方法是未来发展的主要方向。

关键词：恢复力社会-生态系统测量方法综述

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基于易经阴阳的人地关系地域系统模型

地理研究 2015年第2期34卷 225-233页

作者：周晓芳华南师范大学旅游管理学院广州510631

可持续发展实质上是叠加了人文价值的以人类为中心的战略性目标,因而可持续发展理论不是人地关系理论的现阶段形式或最高形式。在纠正可持续发展理论以"人"为中心的错误基础上,基于易经阴阳思想提出人地关系中"人"和"地"互为或互不为中... 详细信息

可持续发展实质上是叠加了人文价值的以人类为中心的战略性目标,因而可持续发展理论不是人地关系理论的现阶段形式或最高形式。在纠正可持续发展理论以"人"为中心的错误基础上,基于易经阴阳思想提出人地关系中"人"和"地"互为或互不为中心,并根据阴阳"一生二"的思想提出从人地关系地域系统的"人"系统和"地"系统的两个中心假设,以"二生三"即阴阳此消彼长的关系来构建人地关系地域系统模型。通过对模型的"六合"投影研究,得出人地关系地域系统的发展轨迹和人—地的阴阳合一线、人—地关系距离演变轨迹,以及人地关系地域系统具备的复杂系统非线性动力和混沌特征。研究表明:以易经的阴阳思想解释人地关系和构建人地关系地域系统模型是探索"人地关系"在"地域"的空间规律或"人地关系地域系统"发展规律的有效方法,人地关系或人地关系地域系统模型或许就是阴阳太极八卦图。并且,作为中国地理学研究核心的人地关系应是中国地理学继续坚持的方向,而这一理论应以中国传统文化思想进行充实和发展。

关键词：人地关系地域系统人地关系阴阳易经模型

一种低功耗高精度Sigma-Delta调制器

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固体电子学研究与进展 2007年第3期27卷 375-379页

作者：詹陈长周晓方周电复旦大学专用集成电路与系统国家重点实验室上海201203

提出了一种改进的三阶单环Sigma-Delta调制器,噪声传递函数采用前馈方式实现极点,降低了积分器输出信号的幅度,从而降低功耗;采用局部反馈实现零点,从而优化了输出信噪比。采用0.35μm CMOS工艺设计了该调制器,过采样率128,信号带宽24k... 详细信息

提出了一种改进的三阶单环Sigma-Delta调制器,噪声传递函数采用前馈方式实现极点,降低了积分器输出信号的幅度,从而降低功耗;采用局部反馈实现零点,从而优化了输出信噪比。采用0.35μm CMOS工艺设计了该调制器,过采样率128,信号带宽24kHz,分辨率16bit,在3.3V工作电压下,模拟电路部分功耗2.7mW,数字部分功耗0.5mW。电路用开关电容技术实现,在HSPICE中通过多工艺角验证。

关键词：低功耗高精度 Sigma—Delta调制器互补金属氧化物半导体

Evolutionary Diversity of Coxsackievirus A6 Causing Severe Hand,Foot,and Mouth Disease—China,2012-2023

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China CDC weekly 2024年第20期6卷 442-449页

作者： Huanhuan Lu Jinbo Xiao Wenhui Wang Dongmei Yan Tianjiao Ji Qian Yang Haiyan Wei Yanhua Du Yunting Zeng Jun Guo Jianhua Chen Hanri Zeng Yingying Liu Shuaifeng zhou Hong Ji Jianxing Wang xiaofang zhou Yong Zhang National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases World Health Organization Polio Reference Laboratory for the Western Pacific RegionKey Laboratory of Laboratory BiosafetyNational Health and Key Laboratory of Laboratory Biosafety of the National Health CommissionNational Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina Linyi Center for Disease Control and Prevention Linyi CityShandong ProvinceChina Henan Provincial Center for Disease Control and Prevention Zhengzhou CityHenan ProvinceChina Shaanxi Provincial Center for Disease Control and Prevention Xi’an CityShaanxi ProvinceChina Hainan Provincial Center for Disease Control and Prevention Haikou CityHainan ProvinceChina Guizhou Provincial Center for Disease Control and Prevention Guiyang CityGuizhou ProvinceChina Gansu Provincial Center for Disease Control and Prevention Lanzhou CityGansu ProvinceChina Guangdong Provincial Center for Disease Control and Prevention Guangzhou CityGuangdong ProvinceChina Hebei Provincial Center for Disease Control and Prevention Shijiazhuang CityHebei ProvinceChina Hunan Provincial Center for Disease Control and Prevention Changsha CityHunan ProvinceChina Jiangsu Provincial Center for Disease Control and Prevention Nanjing CityJiangsu ProvinceChina Shandong Provincial Center for Disease Control and Prevention Jinan CityShandong ProvinceChina Yunnan Provincial Center for Disease Control and Prevention Kunming CityYunnan ProvinceChina

Introduction:Coxsackievirus A6(CVA6)has emerged as a significant pathogen responsible for severe cases of hand,foot,and mouth disease(HFMD).This study aims to delineate the demographic characteristics and analyze the viral evolution of severe HFMD associated with CVA6,thereby assisting in its surveillance and ***:In this investigation,74 strains of CVA6 were isolated from samples collected from severe HFMD cases between 2012 and *** VP1 gene sequences of CVA6 were amplified and analyzed to assess population historical dynamics and evolutionary characteristics using BEAST,DnaSP6,and ***:A significant portion(94.4%)of severe CVA6-associated HFMD cases(51 out of 54,with 20 lacking age information)were children under 5 years *** the 74 CVA6 strains analyzed,72 belonged to the D3a sub-genotype,while only two strains were D2 *** average genetic distance between VP1 sequences prior to 2015 was 0.027,which increased to 0.051 when compared to sequences *** population dynamics analysis indicated three significant population expansions of severe CVA6-associated HFMD during 2012-2013,2013-2014,and 2019-2020,resulting in the formation of 65 distinct *** with the MCC tree findings,transitioning between regional haplotypes required multiple base substitutions,showcasing an increase in population diversity during the evolutionary process(from 14 haplotypes in 2013 to 55 haplotypes over the subsequent decade).Conclusions:CVA6,associated with severe HFMD,is evolving and presents a risk of outbreak ***,enhanced surveillance of severe HFMD is imperative.

关键词： thereby subsequent finding