Zhenyong Zhang

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PURPOSE To compare posterior corneal elevation (PCE) changes and corneal biomechanical changes post fematosecond laser-assisted laser in situ keratomileusis (FS-LASIK) and small incision lenticule extraction (SMILE) procedures using the Pentacam system and the Ocular Response Analyzer (ORA). DESIGN Retrospective observational case series study. METHOD(More)
PURPOSE To conduct in vivo measurements of the bulbar conjunctiva epithelial, stromal, and total thicknesses in healthy Chinese subjects using optical coherence tomography (OCT) and to compare the conjunctival thickness differences between sex and age. METHODS From January to July 2012, healthy Chinese subjects were recruited to undergo a Cirrus HD-OCT(More)
In the present study, we examined the mechanisms of oxaliplatin-induced drug resistance in human colorectal cancer cell lines HT29 and HCT116. Our results demonstrate a significant autophagy expression in CRC cells after an oxaliplatin treatment. Administration of oxaliplatin to human CRC cells significantly enhanced the expression of HMGB1, which regulated(More)
A second order sigma delta modulator (SDM) with a 5-bit quantizer has been presented using several novel techniques: simplified DAC arrays for easy implementation, high-order truncation noise shaping for increased tolerance to analog imperfections, and an extended dynamic range for a maximum input signal swing of up to dB (Full Scale). With truncation(More)
Radiotherapy is an effective form of therapy for most thoracic malignant tumors. However, myocardial injury resulting from the high doses of radiation is a severe complication. Here we aimed to study the possibility of reducing radiation-induced myocardial injury with mesenchymal stem cell (MSC) transplantation. We used MSCs extracted from bone marrow(More)
A novel second order sigma delta modulator (SDM) with 5-bit quantizer has been proposed with simplified DAC arrays, high-order truncation noise shaping for increased tolerance to analog imperfections, and extended dynamic range for a maximum input signal swing of up to -0.45 dBFS. With truncation filter and pseudo SDM in the DSP, the truncation and(More)
In this paper we study approximating the total loss associated with the individual insurance risk model by a compound Poisson random variable. By minimizing the expectation of the absolute deviation of the compound Poisson random variable from the true total loss, we investigate not only the optimal compound Poisson random variable but also the numerical(More)
Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is of limited usefulness for diagnosing thyroid disease, and few studies have reported its use in diagnosing and treating thyroid cysts. The present study investigated a unique case of diagnosis and treatment of a thyroid cyst by EBUS-TBNA. A 67-year-old male presented with back(More)