• Publications
  • Influence
Innovation Contests, Open Innovation, and Multiagent Problem Solving
TLDR
In an innovation contest, a firm (the seeker) facing an innovation-related problem (e.g., a technical R&D problem) posts this problem to a population of independent agents (the solvers) and then provides an award to the agent that generated the best solution. Expand
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Phonetic realization of focus in English declarative intonation
TLDR
The present study investigates how focus is phonetically realized in declarative sentences in American English. The goal is to test the hypotheses that, (a) focus is manifested in parallel rather than in alternation with other intonational functions, and (b) every syllable is associated with a local pitch target. Expand
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Speech melody as articulatorily implemented communicative functions
  • Y. Xu
  • Computer Science
  • Speech Commun.
  • 1 July 2005
TLDR
The understanding of speech melody, i.e., pitch variations related to tone and intonation, can be improved by simultaneously taking into consideration two basic facts: that speech conveys communicative meanings, and that it is produced by human articulators. Expand
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A survey on the communication architectures in smart grid
TLDR
We provide in this paper a comprehensive survey on the communication architectures in the power systems, including the communication network compositions, technologies, functions, requirements, and research challenges. Expand
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Parallel Encoding of Focus and Interrogative Meaning in Mandarin Intonation
  • F. Liu, Y. Xu
  • Medicine, Computer Science
  • Phonetica
  • 1 April 2005
TLDR
The present study investigates question intonation in Mandarin by also considering the role of focus that is frequently ignored in previous research.Abstract Despite much research, disagreements abound regarding the detailed charac-teristicsof question intonomation in different languages. Expand
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Production of Weak Elements in Speech – Evidence from F₀ Patterns of Neutral Tone in Standard Chinese
TLDR
We re-evaluate this view by investigating detailed F0 contours of neutral-tone syllablesin Standard Chinese, which are widely accepted as toneless underlyingly, and show that they do have a target that is independent of the surroundingtones, which is likely to be static and mid. Expand
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Image Smoothing via L 0 Gradient Minimization
We present a new image editing method, particularly effective for sharpening major edges by increasing the steepness of transition while eliminating a manageable degree of low-amplitude structures.Expand
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ProsodyPro — A Tool for Large-scale Systematic Prosody Analysis
This paper introduces ProsodyPro — A software tool for facilitating large-scale analysis of speech prosody, especially for experimental data. The program allows users to perform systematic analysisExpand
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The copy-exactly ramp-up strategy: trading-off learning with process change
  • C. Terwiesch, Y. Xu
  • Engineering, Computer Science
  • IEEE Transactions on Engineering Management
  • 19 February 2004
TLDR
We formalize this intertemporal tradeoff between learning and process change in the form of a dynamic optimization problem. Expand
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User Grouping for Massive MIMO in FDD Systems: New Design Methods and Analysis
TLDR
The massive multiple-input multiple-output (MIMO) system has drawn increasing attention recently as it is expected to boost the system throughput and result in lower costs. Expand
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