Ying-Jie Zhang

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Sensitivity analysis is used in many fields to determine how different parts of a system respond to variations in stimuli. Software-development tasks, such as change-impact analysis, can also benefit from sensitivity analysis. In this paper, we present SENSA, a novel dynamic-analysis technique and tool that uses sensitivity analysis and execution(More)
Program slicing is a popular but imprecise technique for identifying which parts of a program affect or are affected by a particular value. A major reason for this imprecision is that slicing reports all program statements possibly affected by a value, regardless of how relevant to that value they really are. In this paper, we introduce quantitative slicing(More)
In this paper, some sharp inequalities for bounding the gamma function Γ(x) and the ratio of two gamma functions are established. From these, several known results are recovered , refined, extended and generalized simply and elegantly. In [4], it was proved that the function (1) f (x) = ln Γ(x + 1) x ln x is strictly increasing from (1, ∞) onto (1 − γ, 1),(More)
The minimal time a system needs to evolve from an initial state to its one orthogonal state is defined as the quantum speed limit time, which can be used to characterize the maximal speed of evolution of a quantum system. This is a fundamental question of quantum physics. We investigate the generic bound on the minimal evolution time of the open dynamical(More)
This study aimed to evaluate the efficacy, toxicity and tolerability of simultaneous modulated accelerated radiation therapy (SMART)-intensity modulated radiotherapy (IMRT) plus cisplatin and 5-fluorouracil (5-FU) chemo-therapy for patients with advanced nasopharyngeal cancer (NPC). Forty-five patients with stage II-IV NPC, determined by the American Joint(More)
It still needs to be elucidated whether co-detection of EV71 with other intestinal tract viruses plays a role in the pathogenesis of severe hand-foot-mouth disease (HFMD). A total of 680 stool specimens collected from clinically diagnosed mild and severe-HFMD patients were tested for EV71, CA16, norovirus, bocavirus and rotavirus. The results showed that(More)
We study the coherence trapping of a qubit correlated initially with a non-Markovian bath in a pure dephasing channel. By considering the initial qubit-bath correlation and the bath spectral density, we find that the initial qubit-bath correlation can lead to a more efficient coherence trapping than that of the initially separable qubit-bath state. The(More)
As is well known, quantum speed limit time (QSLT) can be used to characterize the maximal speed of evolution of quantum systems. We mainly investigate the QSLT of generalized N-qubit GHZ-type states and W-type states in the amplitude-damping channels. It is shown that, in the case N qubits coupled with independent noise channels, the QSLT of the entangled(More)
BACKGROUND To determine the optimal threshold of 18 F-fluorodexyglucose (18 F-FDG) positron emission tomography CT (PET/CT) images that generates the best volumetric match to internal gross target volume (IGTV) based on four-dimensional CT (4DCT) images. METHODS Twenty patients with non-small cell lung cancer (NSCLC) underwent enhanced three-dimensional(More)