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Automatic pectoral muscle boundary detection in mammograms based on Markov chain and active contour model

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第2期11卷 111-118页

作者： Lei WANG Miao-liang ZHU li-ping deng Xin YUAN School of Computer Science and Technology Zhejiang University Hangzhou 310027 China

Automatic pectoral muscle removal on medio-lateral oblique (MLO) view of mammogram is an essential step for many mammographic processing algorithms. However,it is still a very difficult task since the sizes,the shapes and the intensity contrasts of pectoral muscles change greatly from one MLO view to another. In this paper,we propose a novel method based on a discrete time Markov chain (DTMC) and an active contour model to automatically detect the pectoral muscle boundary. DTMC is used to model two important characteristics of the pectoral muscle edge,i.e.,continuity and uncertainty. After obtaining a rough boundary,an active contour model is applied to refine the detection results. The experimental results on images from the Digital Database for Screening Mammography (DDSM) showed that our method can overcome many limitations of existing algorithms. The false positive (FP) and false negative (FN) pixel percentages are less than 5% in 77.5% mammograms. The detection precision of 91% meets the clinical requirement.

关键词： Pectoral muscle Markov chain Active contour Mammogram

Effect of admission hypertriglyceridemia on the episodes of severe acute pancreatitis

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World Journal of Gastroenterology 2008年第28期14卷 4558-4561页

作者： li-Hui deng ping Xue Qing Xia Xiao-Nan Yang Mei-Hua Wan Department of Integrated Traditional Chinese and Western Medicine West China Hospital Sichuan University Chengdu 610041 Sichuan Province China

AIM： To investigate the effect of admission hypertriglyceridemia （HTG） on the episodes of severe acute pancreatitis （SAP）. METHODS： One hundred and seventy-six patients with SAP were divided into HTG group （n = 45） and control group （n = 131） according to admission triglyceride （TG） ≥ 5.65 mmol/L and 〈 5.65 retool/L, respectively. Demographics, etiology, underlying diseases, biochemical parameters, Ranson＇ s score, acute physiology and chronic heath evaluation Ⅱ （APACHE Ⅱ） score, Balthazar＇s computed tomography （CT） score, complications and mortality were compared. Correlation between admission TG and 24-h APACHE Ⅱ score was analyzed. RESULTS： SAP patients with HTG were younger （40.8 ± 9.3 years vs 52.6 ± 13.4 years, P 〈 0.05） with higher etiology rate of overeating, high-fat diet （40.0% vs 14.5%, P 〈 0.05） and alcohol abuse （46.7% vs 23.7%, P 〈 0.01）, incidence rate of hypocalcemia （86.7% vs 63.4%, P 〈 0.01） and hypoalbuminemia （84.4% vs 60.3%, P 〈 0.01）, 24-h APACHE Ⅱ score （13.6 ± 5.7 vs 10.7 ± 4.6, P 〈 0.01） and admission serum glucose （17.7 ± 7.7 vs 13.4 ± 6.1, P 〈 0.01）, complication rate of renal failure （51.1% vs 16.8%, P 〈 0.01）, shock （37.9% vs 14.5%, P 〈 0.01） and infection （37.4% vs 18.3%, P 〈 0.01） and mortality （13.1% vs 9.1%, P 〈 0.01）. Logistic regression analysis showed a positive correlation between admission TG and 24-h APACHE Ⅱ score （r = 0.509, P = 0.004）.CONCLUSION： The clinical features of SAP patients with HTG are largely consistent with previous studies, HTG aggravates the episodes of SAP.

关键词： Clinical study Hypertriglyceridemia Severe acute pancreatitis Clinical features Outcome

Effect of Annealing on the Microstructure and Properties of In-situ Cu-Nb Microcomposite Wires

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Acta Metallurgica Sinica(English Letters) 2016年第7期29卷 668-673页

作者： li-ping deng Bing-Shu Wang Hong-liang Xiang Xiao-Fang Yang Rong-Mei Niu Ke Han School of Mechanical Engineering and Automation Fuzhou University Fuzhou 350116 China College of Materials Science and Engineering Chongqing University Chongqing 400044 China National High Magnetic Field Laboratory Tallahassee FL 32310 USA

The effects of annealing on microstructure, posite wire have been investigated. Neither changes in magnetoresistance, and hardness of an in situ Cu-Nb microcom- microstructure nor hardness were found until 500 ℃. Particularly, microstructural change within the Nb films was observed in the annealed samples. The room-temperature magnetoresistivity was almost negligible, while magnetoresistivity at -196℃increased with magnetic field. At temperature above 500 ℃, recovery and recrystallization occurred, and both the resistance and hardness decreased.

关键词： Annealing Microstructure Magnetoresistance Hardness Cu-Nb microcomposite wire

Impact of human immunodeficiency virus infection on the course of hepatitis C virus infection: A meta-analysis

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World Journal of Gastroenterology 2009年第8期15卷 996-1003页

作者： li-ping deng Xi-En Gui Yong-Xi Zhang Shi-Cheng Gao Rong-Rong Yang Department of Infectious Diseases Zhongnan Hospital Wuhan University Wuhan 430071 Hubei Province China

AIM: To analyze the influence of human immunodeficiency virus (HIV) infection on the course of hepatitis C virus (HCV) infection. METHODS: We performed a meta-analysis to quantify the effect of HIV co-infection on progressive liver disease in patients with HCV infection. Published studies in the English or Chinese-language medical literature involving cohorts of HIV-negative and -positive patients coinfected with HCV were obtained by searching the PUBMED, EMBASE and CBM. Data were extracted independently from relevant studies by 2 investigators and used in a fixed-effect meta analysis to determine the difference in the course of HCV infection in the 2 groups. RESULTS: Twenty-nine trails involving 16 750 patients were identified including the outcome of histological fibrosis or cirrhosis or de-compensated liver disease or hepatocellular carcinoma or death. These studies yielded a combined adjusted odds ratio (OR) of 3.40 [95% confidence interval (CI) = 2.45 and 4.73]. Of note, studies that examined histological fibrosis/ cirrhosis, decompensated liver disease, hepatocellular carcinoma or death had a pooled OR of 1.47 (95% CI = 1.27 and 1.70), 5.45 (95% CI = 2.54 and 11.71), 0.76 (95% CI = 0.50 and 1.14), and 3.60 (95% CI = 3.12 and 4.15), respectively. CONCLUSION: Without highly active antiretroviral therapies (HAART), HIV accelerates HCV diseaseprogression, including death, histological fibrosis/ cirrhosis and decompensated liver disease. However, the rate of hepatocellular carcinoma is similar in persons who had HCV infection and were positive for HIV or negative for HIV.

关键词： Human immunodeficiency virus Hepatitis C virus Coinfection Disease progression Meta-analysis

Design and development of a new type of phimosis dilatation retractor for children

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World Journal of Clinical Cases 2021年第17期9卷 4159-4165页

作者： You-Wei Yue Yi-Wen Chen li-ping deng Han-liang Zhu Jian-Hua Feng Department of Urology Longgang Central HospitalShenzhen 518116Guangdong ProvinceChina Department of Endocrinology Longgang Central HospitalShenzhen 518116Guangdong ProvinceChina

BACKGROUND Phimosis is one of the most common diseases in *** selection of appropriate treatment for phimosis in children is beneficial to the development of their reproductive organs and significantly improves the prognosis of phimosis in *** traditional circumcision is the most widely used,it has many disadvantages,including postoperative bleeding and incision infection,pain,obvious scars on the surgical incision,and unsatisfactory *** addition,there is much contro-versy regarding treatment options and timing at home and *** procedures such as circumcision and cerclage for children with excessively long foreskin will greatly affect the normal life of children after the *** children need general anesthesia,but this anesthesia carries a great *** To design a new children phimosis dilatation retractor for children *** The children phimosis was dilated with an elastic dilation frame,in order to expand the foreskin mouth and expose the penis head,and after that,the phimosis was *** A new type of phimosis dilatation retractor was designed,which can gently dilate the prepuce at multiple angles and in multiple directions at the same *** has obtained the national patent for clinical *** The phimosis dilatation retractor based on the principle of elastically expanding the prepuce can achieve the purpose of expanding the *** clinical application shows that the effect of the children phimosis retractor is significant,which is worth promoting.

关键词： Dilation Phimosis Retractor Children

Two new bromoindoles from red alga Laurencia similis

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Chinese Chemical Letters 2009年第4期20卷 456-458页

作者： Hua Su Zhao Hui Yuan Jing li Shu Ju Guo li ping deng li Jun Han Xiao Bin Zhu Da Yong Shi Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

Two new bromoindole alkaloids have been isolated from the ethanolic extract of the red alga Laurencia similis. On the basis of chemical and spectroscopic methods （including 1D and 2D NMR technique）, their structures have been elucidated as 2,2＇,5,5＇,6,6＇- sixibromo-3, 3＇-bi-lH-indole and 3, 5-dibromo-1-methylindole, respectively.

关键词： Laurencia similis Bromoindole alkaloid 2,2',5,5',6,6'-Sixibromo-3,3'-bi-lH-indole 3,5-Dibromo-l-methylindole

Preparation of tungsten-iron composite oxides and application in environmental catalysis for volatile organic compounds degradation

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Tungsten 2022年第1期4卷 38-51页

作者： Jiang liu Song-lin Wang Ji-li Xuan Bo-Fang Shan Hong Luo li-ping deng Peng Yang Chen-Ze Qi Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process School of Chemistry and Chemical EngineeringShaoxing UniversityShaoxing 312000China School of Chemistry and Chemical Engineering Henan Institute of Science and TechnologyXinxiang 453003China Zhejiang Hengfeng New Material Co. LTDShaoxing 312000China State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China

Emission of volatile organic compounds has important influence on complex air pollution and human *** this paper,a series of tungsten-iron composite oxides with different proportions and preparation methods were synthesized and first used for catalytic combustion of chlorobenzene and toluene,as typical polluting gas *** WO_(3)-based solid catalytic materials were systematically characterized by modern analytical methods,and the results showed that there was strong electron interaction between W and Fe elements in the composite oxides,and the presence of a certain amount of tungsten oxide inhibited the crystallization of iron oxide,and vice versa,which were beneficial to the uniform dispersion of tungsten-iron components into each other and the improvement of redox *** with single-component oxide,the formation of tungsten-iron composite oxide affected the micro-structure,improved the specific surface area and optimized the pore structure of *** performance test results showed that the tungsten-iron composite oxide(FeWO_4-0.5 Fe_(2)O_(3),molar ratio of tungsten and iron was 1/2)prepared using citric acid-based sol-gel method was the optimal,and its catalytic degradation efficiency could reach 90%for chlorobenzene and 83%for toluene at 320℃,and maintain at least 60 h without obvious deactivation,with high selectivity to the formation of HCl and CO_(2).

关键词： Volatile organic compounds Catalytic combustion WO_(3) FeWO_4 Composite oxide Synergistic catalytic effect

Active Load Reduction Control of Floating Wind Turbine Based on Double Damper

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Active Load Reduction Control of Floating Wind Turbine Based...

Energy Levels of Highly Ionized Ar XIV

作者： Zhu-li deng Lei WANG li-ping deng School of Automation College Chongqing University College of Foreign Languages Chongqing University of Posts and Telecommunications

Due to the lack of rigid support structure of floating wind turbine（WT） at sea, the external load affected by wind-wave-flow coupling is much larger than that of fixed-pile WT. How to make the floating WT safe, reliable and stable operation has become a research hotspot in the current far-reaching sea breeze energy utilization. In order to reduce the load of offshore floating WT subjected to external environment during operation, this paper studies a double damper load reduction structure with confined mass dampers installed in the nacelle and floating platform. Active control method to reduce the load of floating WT at sea. Through the simulation verification analysis of NREL 5 MW wind turbine, it is found that the load impact and output power stability are effectively improved, which provides a useful method for the development of deep sea wind power resources in China.

关键词： Floating wind turbine Reduced load control Double damper Output power

来源： cnki会议评论

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Communications in Theoretical Physics 2006年第10期 723-726页

作者： CHENG Zhang, li ping,~* and deng Xiao-Hui Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China

With the Breit interaction and quantum electrodynamics corrections considered, relativistic configuration interaction calculations have been carried out in the extended optimal level scheme using multi-configuration Dirac-Fock wave functions on the 204 energy levels and electric dipole transitions of Ar ⅪⅤ. The results of electric dipole transitions are in good agreement with experiments. Among the energy levels calculated, the lowest 125 levels are in good agreement with available experimental and other theoretical ones, and the other 79 levels are new ones obtained by the present work. This wide range of atomic energy levels is useful in astrophysics and plasma physics.

关键词： Ar XIV energy level MCDF RCI