Qian-Yu Tang

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Abstract This paper presents a new stochastic model for two dimensional layouts of large size. Two problems are addressed: (i) Under the condition that the number of wires emanating from a block is Poisson distributed, determine the distribution of channel width, thus estimating the average channel width. (ii) Given T tracks for each channel, determine the(More)
OBJECTIVE Late gadolinium enhancement (LGE) patterns of cardiovascular magnetic resonance (CMR) relying on PSIR (phase-sensitive inversion recovery sequence) techniques had been used to determine the characteristics of LGE in apical hypertrophic cardiomyopathy (ApHCM). METHODS Forty patients pure ApHCM [age, (60.2±10.4) years, 31 men] were enrolled. LGE(More)
In this paper we show that an optimization algorithm using infinitesimal perturbation analysis converges to the minimum of the performance measure. The algorithm is updated every fixed number of customers period rather than every one or two busy periods. The key step of the proof is to verify that the observation noises satisfy the strong law of large(More)
Central limit theorems are obtained for the PARMSR (perturbation analysis Robbins-Monro single run) algorithm with averaging, updated either after every regenerative cycle or after every xed-length observation period, for one-dependent regenerative processes. These stochastic approximation algorithms with averaging turn out to have identical limiting(More)
It is shown that a global optimization algorithm using ordinal comparison converges to the good enough designs with a convergence rate faster than any polynomial of the total computing budget. The result is established in the context of one-dependent regenerative processes under the exponential stability condition of the underlying systems. A systematic(More)
OBJECTIVE To determine the deference between phase sensitive magnetic resonance (MR) imaging and magnitude reconstruction to detect infracted myocardium. METHODS Twenty patients (16 men; 4 women; mean age, 56 years). experienced Q-wave myocardial infarction 2 weeks earlier were examined with a 3.0-T MR system 10 minutes after administration of 0.1 mmol/kg(More)
OBJECTIVE To evaluate the anatomical characteristics and patterns of neurovascular compression in patients suffering trigeminal neuralgia, using 3D high-resolution magnetic resonance imaging methods and fusion technologies. METHODS The analysis of the anatomy of the facial nerve, brain stem and the vascular structures related to this nerve was made in 100(More)