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关键词： Fusion categories   Braided fusion categories  

摘要： We prove several results in the theory of fusion categories using the product (norm) and sum (trace) of Galois conjugates of formal codegrees. First, we prove that finitely-many fusion categories exist up to equivalence whose global dimension has a fixed norm. Furthermore, with two exceptions, all formal codegrees of spherical fusion categories with square-free norm are rational integers. This implies, with three exceptions, that every spherical braided fusion category whose global dimension has prime norm is pointed. The reason exceptions occur is related to the classical Schur-Siegel-Smyth problem of describing totally positive algebraic integers of small absolute trace. (C) 2020 Elsevier Inc. All rights reserved.

关键词： Derived category of coherent sheaves   Smooth projective curve   Thick subcategory   Quiver representation  

摘要： We classify triangulated categories that are equivalent to finitely generated thick subcategories T subset of D-b(coh C) for smooth projective curves C over an algebraically closed field. (c) 2020 Elsevier Inc. All rights reserved. (c) 2020 Elsevier Inc. All rights reserved.

关键词： Climate   Hot-cold system   Medicinal plants   Ethnomedicine   Mesoamerica   Humoral system  

摘要： Ethnopharmacological relevance: The concepts of health and illness, and their causes, are fundamental for understanding medicinal plant choice and use by traditional people. The hot-cold system is widespread in Mesoamerican traditional medicine and guides many therapeutic decisions. Aim of the study: This study explores a hypothesis that climate influences the hot-cold classification of illnesses and medicinal plants, and the perception of hazard of illnesses. In addition, we examine the classification categories within the system used in different regions of Mexico. Materials and methods: Studies from Mexico with quantitative and qualitative data on the hot-cold properties of medicinal plants and ailments were reviewed. The information was organized and then related to the climate type of the study areas. Results: In temperate climates, most diseases were considered cold, and hot medicinal plants were dominant. Conversely, in warm-tropical climates, hot diseases dominated, and the majority of medicinal plants were cold;however, this evidence was weaker. The perception of hazard was congruent with the number of illnesses for temperate climates. There were additional classification categories within the hot-cold system for diseases and medicinal plants, and they were expressed in different terms in Spanish, English, and indigenous languages. Although similar terms and categories were used in the classification of diseases and medicinal plants, they can differ conceptually and vary between places and cultures. Publications are sometimes unclear if the terms used are emic or etic. The basic principle of using plants with the opposite property of the disease does not always apply strictly. Conclusions: Climate appears to influence the hot-cold classification of diseases and medicinal plants in Mexico, and the system is not strictly dual. Improved knowledge of the hot-cold system is necessary to understand Mesoamerican medicinal plant use and culture.

关键词： 行政机关   环境法律关系   补充赔偿责任   国家赔偿  

摘要： 自《民法典》公布后,环境权益正式上升为与人身权、财产权等私权并立的一种新的法律客体,不可避免的会对既有法律体系带来挑战和突破。实践中,除企事业单位和个人之外,行政机关在提供公共服务和行使职权过程中亦可能会直接或间接地导致环境污染和生态破坏的后果,在“强国家,弱社会”认知观念的束缚下,其中暗含法理的自洽性问题被选择性地忽视。需围绕环境权益以厘清和界分“公私交错”的三重法律关系:行政关系、行政法律关系和环境法律关系。未来立法中应结合各重关系的法律属性并辅之以对应的责任形式,故使违法行使监管职权的行政机关对由其造成的损害结果承担民事上的补充赔偿责任,以充分贯彻“损害担责”“国家赔偿”的内在蕴意。

关键词： 学校体育   学校体育督导   督政督学   评估监测   实施障碍   改进策略  

摘要： 学校体育督导评估督促政府依法履行教育职责,指导学校依法办学和科学评估监测,有力促进学校体育工作健康有序发展。运用文献资料法、专家访谈法、案例法、比较分析法等研究方法,对学校体育督导评估的组织实施、现实困境和完善策略进行研究。研究结果表明:1)我国学校体育形成了"国—省—市—县"四级组织层次,实施"督政、督学、评估监测"三位一体的督导评估活动。2)现实困境体现在法规制度不健全,主体权威弱化;行政依附显著,机构独立不足;督导程序死板,社会参与缺失;责权不明、监管不力,结果应用模糊等方面。3)完善策略有健全法律法规,确保制度权威性;深化体制改革,增强机构独立性;强化队伍建设,保证督评科学性;明确主体责权,重视结果应用性等。

关键词： Proper resolution   coproper coresolution   extriangulated categories   Gorenstein categories  

摘要： Let(C,E,s)be an extriangulated category with a proper classξof E-triangles,and W an additive full subcategory of(C,E,s).We provide a method for constructing a proper W(ξ)-resolution(resp.,coproper W(ξ)-coresolution)of one term in an E-triangle inξfrom that of the other two *** using this way,we establish the stability of the Gorenstein category GW(ξ)in extriangulated *** results generalize the work of ***[***,2013,393:142–169]and *** and ***[Rocky Mountain ***.,2017,47:1013–1053],but the proof is not too far from their ***,we give some applications about our main results.

关键词： 综合技能   UG软件   液压气压   机修   特色教学  

摘要： 随着新时代招生就业和等级工考试等方面的发展,钳工专业应与时俱进,进行相应的改革,丰富钳工技能训练内容,增设液压气压模块教学、机修模块教学和UG软件教学,将所学知识串联起来,融会贯通,帮助学生构建完整的知识体系,为他们以后的就业助上一臂之力。

关键词： 历史性变革   重大传染病   深圳经济特区   巨灾保险   疫情   全面建成小康社会   十三五  

摘要： 一、重大传染病巨灾保险机制研究综述2020年是特殊的一年。2020年是我国全面建成小康社会和"十三五"规划收官之年,国家即将实现第一个百年奋斗目标。2020年是深圳经济特区成立40周年,深圳见证了改革开放40年国家的历史性变革和取得的伟大成就。2020年也是中国人民不屈不挠抗击新型冠状病毒肺炎疫情(以下简称"新冠疫情")的一年。

关键词： 《文心雕龙》   清绮   审美范畴   尚雅  

摘要： 刘勰以“清绮”一词概括魏文帝曹丕的文才,但是之后并没有给出明确的解释。对“清”“绮”进行溯源,考察两者的审美意义,并以《文心雕龙》中出现的以“清”“绮”为构成语素的范畴作为内证,将刘勰所论述的有关“魏文帝的文才”作为具体对象进行分析,明确了“清绮”独特而丰富的审美内涵:1.以“清”修饰“绮”,是为了淡化“绮”,消解“绮”的畸形膨胀;2.作者内在气质之“清”表现为作品外在之“绮”;3.作品具备“绮”内容与形式的同时又要以崇“清”(“雅”)尚“简”为原则。