Compositemap: A Novel Framework for Music Similarity Measure

10.1145/1571941.1572011Proceedings - 32nd Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2009403-41

A split-merge framework for comparing clusterings

External clustering evaluation measures are often used to evaluate the performance of different clustering algorithms on a collection of data sets. Traditional normalization property is no longer suitable for this task and a conditional normalization property is proposed based on the fact that one clustering is the ground-truth. Even existing measures have been proposed from different points of view, we study them from the normalization point of view. Besides, we propose a new category of cluster counting measures and further group set matching measures into two subcategories according to how the matching is performed. Furthermore, we propose a generative model to study how exist- ing measures are generated as well as producing new measures according to application requirements. In order to understand the intrinsic properties of a measure, a graph-based model is presented to model two clusterings as a directed bipartite graph, which can be decomposed into weakly connected components. A measure can be expressed as a conic combination of scores on components, and different weights are assigned to components when aggregating their scores. Based on the graph-based model, we propose a split-merge framework by breaking components into subcomponents and combining the scores of any two related subcomponents. It is conditionally normalized while existing measures are not. It also has many nice properties compared to other existing frameworks. We give some examples of the framework and compare one example with a few representative measures theoretically and empirically on a coreference resolution data set.MASTER OF ENGINEERING (SCE

Compositemap: A Novel Music Similarity Measure for Personalized Multimodal Music Search

How to measure and model the similarity between different music items is one of the most fundamental yet challenging research problems in music information retrieval. This paper demonstrates a novel multimodal and adaptive music similarity measure (CompositeMap) with its application in a personalized multimodal music search system. CompositeMap can effectively combine music properties from different aspects into compact signatures via supervised learning, which lays the foundation for effective and efficient music search. In addition, an incremental Locality Sensitive Hashing algorithm is developed to support more efficient search processes. Experimental results based on two large music collections reveal various advantages in effectiveness, efficiency, adaptiveness, and scalability of the proposed music similarity measure and the music search system. Categories and Subject Descriptor

Brownfield regeneration – imperative for sustainable urban development

U radu se analizira mogućnost revitalizacije napuštenih ili nedovoljno iskorištenih industrijskih i komercijalnih građevina i površina u gradovima poznatih pod nazivom braunfild (engl. brownfield). Navedene građevine i površine najčešće se nalaze u središnjim jezgrama gradova, a njihovom revitalizacijom dobivaju se novi sadržaji i vrlo često novi simboli gradova. Značenje braunfild regeneracije razmatrano je na osnovi američkih i europskih iskustava u kontekstu održivog razvoja gradova.The possibility of revitalization of abandoned or insufficiently used industrial and commercial facilities and areas in towns, known as brownfield incentives, is analyzed in the paper. These facilities and areas are most often situated in central parts of towns, and their revitalisation results in creation of new facilities which often become symbols or landmarks of such towns. The meaning of brownfield regeneration is considered on the basis of American and European experiences in the context of sustainable development of towns and cities

Comprehensive Query-Dependent Fusion Using Regression-on-Folksonomies: A Case Study of Multimodal Music Search

10.1145/1631272.1631303MM'09 - Proceedings of the 2009 ACM Multimedia Conference, with Co-located Workshops and Symposiums213-22

Ferroelectric Polarization Enhanced Photodetector Based on Layered NbOCl2

NbOCl2 is an emerging ferroelectric layered material with unique optoelectronic properties, in which the built‐in electric field caused by spontaneous polarization can independently drive the separation and transport of photoexcited electrons and holes. However, the optoelectronic performance of NbOCl2 and its device application have remained elusive. Here, few‐layer NbOCl2 is prepared by the liquid exfoliation method and used to construct photoelectrochemical (PEC)‐type photodetectors. The photodetectors are self‐powered with broadband photoresponse and long‐term cycle stability. Due to the built‐in electric field generated by the spontaneous polarization, the whole system exhibits an open circuit potential of approximately 0.205 V. Interestingly, the open circuit potential can be significantly increased to 0.446 V after poling treatment. The responsivity without external bias is increased by about 2.5 times after 1 V poling and by about 4 times after a poling time of 500 s. Moreover, the tunable ferroelectric polarization shows memory effect and retains about 25% enhancement in photocurrent density even after 60 min. The tuneability of the built‐in electric field in PEC systems based on NbOCl2 offers numerous possibilities for the development of photodetectors and nonvolatile memory devices

Tailoring topological transition of anisotropic polaritons by interface engineering in biaxial crystals

Polaritons in polar biaxial crystals with extreme anisotropy offer a promising route to manipulate nanoscale light-matter interactions. The dynamical modulation of their dispersion is great significance for future integrated nano-optics but remains challenging. Here, we report a momentum-directed strategy, a coupling between the modes with extra momentum supported by the interface and in-plane hyperbolic polaritons, to tailor topological transitions of anisotropic polaritons in biaxial crystals. We experimentally demonstrate such tailored polaritons at the interface of heterostructures between graphene and {\alpha}-phase molybdenum trioxide ({\alpha}-MoO3). The interlayer coupling can be electrically modulated by changing the Fermi level in graphene, enabling a dynamic topological transition. More interestingly, we found that the topological transition occurs at a constant Fermi level when tuning the thickness of {\alpha}-MoO3. The momentum-directed strategy implemented by interface engineering offers new insights for optical topological transitions, which may shed new light for programmable polaritonics, energy transfer and neuromorphic photonics

Ultrasensitive detection of miRNA with an antimonene-based surface plasmon resonance sensor

Label-free molecular-level quantification of MicroRNA (miRNA) remains challenging. Here, the authors develop a new surface plasmon resonance sensor based on two-dimensional nanomaterial of antimonene for the specific label-free detection of clinically relevant biomarkers such as miRNA-21 and miRNA-155