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Search Results: 1 - 10 of 50551 matches for " Hui Sun "
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Clinical and Imaging Analysis of a Cerebellar Watershed Infarction  [PDF]
Mei Zheng, Aping Sun, Qingli Sun, Hui Zhang, Dongsheng Fan
Chinese Medicine (CM) , 2015, DOI: 10.4236/cm.2015.61006
Abstract: Objective: To investigate the characteristics of vascular lesions in patients with a cerebellar watershed infarction. Methods: Clinical data from 178 cases of cerebellar infarction were collected with magnetic resonance imaging (MRI) scan results, including diffusion weighted imaging (DWI), a magnetic resonance angiography (MRA), and computed tomography angiography (CTA). The cases were divided into cerebellar watershed and non-watershed infarctions based on lesion location, which was revealed by DWI. Forty-two cases met the criteria for a cerebellar watershed infarction. Based on the MRA/CTA results, the vertebrobasilar artery stenoses were divided into four categories (i.e., intracranial, extracranial, combined, and no detectable stenosis) to compare the vascular lesion characteristics from patients with a cerebellar watershed infarction and patients with a non-watershed infarction. Results: Patients with cerebellar watershed infarcts presented mild symptoms at onset and had a favorable prognosis. However, 90.5% of these patients had a vascular stenosis, which was higher than for patients with a cerebellar non-watershed infarction (74.3%). The four types of vascular lesions, intracranial, extracranial, combined, and no detectable stenosis, were 14.3%, 52.4%, 23.8%, and 9.5% in patients with a cerebellar watershed infarction and 33.8%, 16.2%, 24.3%, and 25.7% in patients with a non-watershed cerebellar infarction, respectively. Conclusion: Although patients with cerebellar watershed infarcts often had comparatively benign clinical manifestations and prognoses, such patients also had a high stenosis prevalence in major blood vessels, especially the extracranial segment in the vertebral artery, which required early intervention and treatment.
Image Preprocessing Methods to Identify Micro-cracks of Road Pavement  [PDF]
Hui Wang, Zhang Chen, Lijun Sun
Optics and Photonics Journal (OPJ) , 2013, DOI: 10.4236/opj.2013.32B025

Standards of highway conservation and maintenance are improved gradually following the improvement of requirements of road service. Before obvious damage such as obvious cracking (blocktransverse, longitudinal ) and rutting emerge, inconspicuous distress (micro-cracks, polishing, pockmarked) is generated previously. These inconspicuous distresses may provide basis and criteria for pavement preventive maintenance. Currently most of preventive conservation measures are determined by experienced experts in maintenance and repair of road after site visits. Thus method is difficult in operation, and has a certain amount of instability as it is based on experience and personal knowledge. In this paper, camera and laser were used for automated high-speed acquisition images. Methods to preprocess pavement image are compared. The pretreatment method suitable for analyze micro-cracks picture is elected, an effective way to remove shadow is also proposed.

Characterizing Subzero-Temperature Thermal Properties of Seasonally Frozen Soil in Alpine Forest in the Western Sichuan Province, China  [PDF]
Hui Sun, Shuai Liu, Jihong Qin
Journal of Water Resource and Protection (JWARP) , 2016, DOI: 10.4236/jwarp.2016.85048
Abstract: Seasonally frozen soil in alpine and subalpine zones in the mountains of Qinghai-Tibetan Plateau is particularly sensitive to global climate change. Therefore, a better understanding of the thermal properties of frozen soil is crucial for predicting the responses of frozen soils to soil warming. In this study, thermal properties of frozen soil with different moisture contents under subzero temperature (0°C - 20°C) in an alpine forest in western Sichuan were analyzed by KD2 Pro in its cooling and heating processes, respectively. Our results reveal that the soil apparent volumetric specific heat capacity (Cv) and apparent thermal conductivity (K) under the same water content show similar response patterns to changing temperature lower than -2°C in both heating and cooling processes. Moreover, ice content of frozen soils can be well predicted by Logistic model in cooling and heating processes. The Cv and K tend to increase along with increasing soil moisture contents. Remarkably, asymptotic characters of the value of Cv and K are at the vicinity of the initial temperature of phase transitions, indicating that both Cv and K are particularly sensitive to changing soil temperature at the range of -2
Diffusion Analysis and Modeling of Potassium Sorbate in Gelatin Based Antimicrobial Film  [PDF]
Hui Wang, Jieyu He, Hongyuan Sun
Journal of Materials Science and Chemical Engineering (MSCE) , 2016, DOI: 10.4236/msce.2016.47001

The diffusion of potassium sorbate incorporated into gelatin based antimicrobial film was measured. Fick’s second law was applied to investigate the mechanism of potassium sorbate released from the films. The mathematical model was established. The result showed that the diffusion coefficient D increased with the increase of potassium sorbate concentration. The effects of temperature 5?C, 25?C and 35?C on diffusion were investigated. The mechanisms of potassium sorbate diffusion through gelatin films were mainly Fickian and determined by the power law model Mt/M = k × tn. A decrease in temperature from 35?C to 5?C resulted in a reduction of diffusion coefficients from 5.20 × 10?12 to 1.36 × 10?12 m2/s. The diffusion coefficient of potassium sorbate is influenced by receiving solution pH values.

Optimal Excess-of-Loss Reinsurance and Investment Problem for Insurers with Loss Aversion  [PDF]
Qingya Sun, Ximin Rong, Hui Zhao
Theoretical Economics Letters (TEL) , 2019, DOI: 10.4236/tel.2019.94073
Abstract: This paper studies an optimal reinsurance and investment problem for a loss-averse insurer. The insurers goal is to choose the optimal strategy to maximize the expected S-shaped utility from the terminal wealth. The surplus process of the insurer is assumed to follow a classical Cramér-Lundberg (C-L) model and the insurer is allowed to purchase excess-of-loss reinsurance. Moreover, the insurer can invest in a risk-free asset and a risky asset. The dynamic problem is transformed into an equivalent static optimization problem via martingale approach and then we derive the optimal strategy in closed-form. Finally, we present some numerical simulation to illustrate the effects of market parameters on the optimal terminal wealth and the optimal strategy, and explain some economic phenomena from these results.
Experience, Attraction, and Perceived value of the Seniors Community Chorus Concert
International Review of Management and Business Research , 2013, DOI: 31/12/2013
Abstract: Seniors’ leisure is an important social issue. Audience members at a seniors’ community chorus concert were surveyed to identify the factors which determine audience satisfaction and repurchase intention. Experiential marketing and perceived value positively and significantly influenced audience satisfaction. Attraction did not significantly and positively affect audience satisfaction. Audience satisfaction positively and significantly affected repurchases intention. Finally, this study identifies the factors affecting purchase intention for consumers of a community chorus performance to further the promotion of seniors’ musical concerts.
Internal opening incision with harmonic scalpel, remaining and tunnel thread-dragging methods in surgical management of posterior horseshoe fistula
Yan-hui SUN
Zhong Xi Yi Jie He Xue Bao , 2007,
Clinical observation of incision and drainage with ultracision-harmonic scalpel and thread-drawing in children with anal fistula: a report of 21 cases
Yan-hui SUN
Zhong Xi Yi Jie He Xue Bao , 2008,
External Chinese medical therapy for pain associated with hyperplastic disease of the breast: study protocol of a randomized, double-blind, multicenter, controlled trial
Xiao-hui Sun
Zhong Xi Yi Jie He Xue Bao , 2012,
The Research of Anti-Swelling and Low Damage Killing Fluid System  [PDF]
Qinggong DANG, Hui JIA, Shuang SUN, Meng LI, Zhenqi JIA
Energy and Power Engineering (EPE) , 2009, DOI: 10.4236/epe.2009.11008
Abstract: In this paper, we introduced reservoir characteristics in Block Xiao-he-long and evaluate the performance of the existing killing fluid system. According to the production requirements, a anti-swelling and low damaging system of chemical agents suitable for this block was optimized, including anti-swelling agent, water lock inhibitor, fluid-loss agent additives, plus a corrosion inhibitor HS-1 developed by in the lab. The system is composed by base liquid (0.7%X + 2.0%KCl +0.05%SY-1+ 0.05%HS-1+2.0% DST-1 dissolved in water) and weighting material (NaCl) with its density adjustable range between 1.0g/ml and 1.2g/ml. Its anti-swelling ratio achieves 53.80%, and the reservoir permeability recovery ratio reaches more than 95.0%.
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