学科服务 更多>>

关键词： 上海音乐学院   美学问题   西方哲学家   学科定位   音乐美学   音乐学   论音乐   音乐史  

摘要： “2020上海音乐学院第三期音乐美学与当代音乐研究主题国际讲坛”,于2020年8月24-28日在上海通过腾讯会议线上演讲方式进行,特别邀请多位国内外知名学者前来参与演讲,共同讨论音乐美学与音乐学、音乐史的关系,以及中国艺术传统、西方哲学家论音乐,等等。在此,发表若干篇经过整理的演讲录。

关键词： TCAM   Packet classification   Multi-category   Multi-match  

摘要： Packet classification is the base of various network functions such as firewall filtering, network intrusion detection and quality of services, etc. Ternary content addressable memory (TCAM) is widely employed in performing efficient packet classification. However, TCAM has some drawbacks, including limited capacity, high energy consumption, and incapability to store arbitrary ranges. Moreover, TCAM is only suitable for single-match packet classification natively, which is associated with one rule-set and reports one rule, for it only reports the first matching entry. However, except for single-match packet classification, another type of packet classification, multi-category packet classification, which is associated with multiple rule-sets and reports one matching rule for each rule-set, is also required in some scenarios, such as in the consolidation of multiple single-match network functions. The naive scheme performing multi-category packet classification with TCAM is to search a packet in multiple rule-sets one by one. Its performance decreases linearly as the number of rule-sets increases. To efficiently perform multi-category packet classification using TCAM, a novel scheme named REM is proposed in this paper. REM is based on the idea of reducing TCAM accesses per classification by merging rule-entry sets converted from rule-sets. The experiments show that compared with the naive scheme, REM can achieve 3x to 5x improvement on packet classification throughput, and reduce the energy consumption by 50% to 75%.

关键词： (Normalized) topological category   Clopen object   Connected object   Topos  

摘要： In this paper we extend the notion of a clopen subset of a topological space to that of a clopen subobject in a topological category. We relate clopen subobjects to the concept of normalized topological category via a theorem which, in turn, shows why certain subsets must be clopen in a topological space. We employ clopen subobjects to extend the topological notion of connectedness to topological categories. Examples of clopen subobjects and connected objects in several topological categories are given. (C) 2021 Elsevier B.V. All rights reserved.

关键词： 近代诗话   文论范畴   话语特色  

摘要： 近代诗话产生于特定的时代环境中,先后提出了一些重要的文论范畴,如"新理想""新意境""旧风格","真诗""真性情""真意","学人之言""诗人之言",等等,这些范畴指向不同的文化追求,都带有时代的痕迹。近代诗话的字里行间都浸染着沉重的现实感,同时,部分作品的用语又明显趋向欧化、西化。话语的多元化也反映了转型时期诗学观念的多元化,以及近代人在观念世界中的激烈碰撞。

关键词： 声调   听感范畴   调型   外标认知论   最小距离   兴化方言  

摘要： 文章用峰点音高、凹点位置、凹点音高三个参数,对江苏兴化方言三个拱形相似、都带有上升段或[+Rising]特征的"R调"进行了多组听辨实验,分别考察了三个参数对于感知高升-前凹、前凹-央凹、高升-央凹三组调型的区别作用。结果表明,峰点音高可以独立起区别作用,凹点位置起辅助作用,凹点音高与峰点音高有极高的相关性。文章还论证了听感范畴都是离散性的,听感范畴包括互补范畴和交叉范畴,后者即通常所说的"连续感知"和"类范畴感知"。通过听感实验,文章证实了本文提出的一个假说:声调听感范畴对应于声调的类型学范畴,由此表明了文章提出的"外标认知论"及其方法的可行性。

关键词： 原型范畴理论   熟词生义   语义范畴   教学启示  

摘要： 近年来,高考英语越来越注重考查熟词生义,熟词生义的学习和融会贯通是英语学习的重要一环。文章运用原型范畴理论,对高考真题中出现的熟词生义进行分析和解释,发现高考英语中出现的熟词的语义范畴存在原型效应,即熟词多个义项是通过"原型义"扩展、引申而来的,并得出以下五点教学启示:重视熟词原型义项,激活学生认知思维,构建熟词义项网络,鼓励"英英"词义阐释以及结合语境分析生义。

关键词： atypia of undetermined significance   follicular lesion of undetermined significance   risk of malignancy   thyroid cytology  

摘要： Introduction Fine needle aspiration cytology (FNAC), along with thyroid ultrasound, is an important tool in evaluation of thyroid nodules that helps in further management of these patients in making a decision of surgical intervention vs follow-up. The Bethesda System for Reporting Thyroid Cytopathology category III of atypia of undetermined significance/follicular lesion of undetermined significance (AUS/FLUS) has risk of malignancy (ROM) ranging from 5% to 15%. The aim of the present study was to describe the frequency of AUS/FLUS in thyroid gland FNACs and the surgical outcomes of these cases. Methods The integrated laboratory management system retrieved the thyroid FNACs from 2010 to 2018 and subsequent surgical pathology specimens. For the AUS/FLUS cases, data regarding patient demographics, cytology and histological diagnoses were recorded. The results were tabulated as the overall frequency of AUS/FLUS in thyroid FNACs, cytohistological correlation (benign and malignant) and ROM. Results Over a period of 9 years, 256 (10.9%) cases out of 2342 thyroid FNACs were reported as AUS/FLUS at our institution. Mean age was 43.5 years. The majority (70.3%) of patients were female. Seventy-two of 104 resection specimens (69.2%) were reported as benign and 32 cases (30.7%) had malignant diagnosis. Upper-bound ROM was 30.7% (32 cases with malignant diagnosis out of 104 resection specimens). Lower-bound ROM was calculated as 12.5% (32 cases with malignant diagnosis out of 256 total AUS diagnosis). Conclusion The AUS/FLUS category of thyroid cytology and associated ROM remain an evolving area. Individual institutions should monitor the frequency and include ROM in the dashboard indicators to remain within the recommended range.

关键词： 19D55   55R40   57R90 (primary)  

摘要： The homotopy category of the bordism category hCd has as objects closed oriented (d-1)-manifolds and as morphisms diffeomorphism classes of d-dimensional bordisms. Using a new fiber sequence for bordism categories, we compute the classifying space of hCd for d=1, exhibiting it as a circle bundle over omega infinity-2CP-1 infinity. As part of our proof, we construct a quotient C1red of the cobordism category where circles are deleted. We show that this category has classifying space omega infinity-2CP-1 infinity and moreover that, if one equips these bordisms with a map to a simply connected space X, the resulting C1red(X) can be thought of as a cobordism model for the topological cyclic homology TC(S[omega X]). In the second part of the paper, we construct an infinite loop space map B(hC1red)-> Q(sigma 2CP+infinity) in this model and use it to derive combinatorial formulas for rational cocycles on hC1red representing the Miller-Morita-Mumford classes kappa i is an element of H(B(hC1);Q).

关键词： Symmetric monoidal closed category   Compact closed category   Dagger category   Enriched category   Cobordism  

摘要： A coherence result for symmetric monoidal closed categories with biproducts is shown in this paper. It is also explained how to prove coherence for compact closed categories with biproducts and for dagger compact closed categories with dagger biproducts by using the same technique. (C) 2020 Elsevier B.V. All rights reserved.