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Short-Time Dynamics of the Random n-Vector Model

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Communications in Theoretical Physics 2001年第11期36卷 611-616页

作者： CHEN Yuan li zhi-bing FANG Hai HE Shun-Shan SITU Shu-Ping Department of Physics Guangzhou UniversityGuangzhou 510405China Department of PhysicsZhongshan UniversityGuangzhou 510275China Department of PhysicsZhongshan UniversityGuangzhou 510275China Department of PhysicsZhongshan UniversityGuangzhou 510275China Department of PhysicsZhongshan UniversityGuangzhou 510275China

Short-time critical behavior of the random n-vector model is studied by the theoretic renormalization-group *** scaling laws are studied in a frame of the expansion in e = 4 - d for n ≠ 1 and for n = *** d ＜ 4,the initial slip exponents θ′ for the order parameter and θ for the response function are calculated up to the second order in e ＝ 4 - d for n ≠ 1 and for n ＝ 1 at the random fixed point *** results show that the random impurities exert a strong influence on the short-time dynamics for d ＜ 4 and n ＜ nc.

关键词： n-vector model,short-time critical dynamics,quenched impurities,initial slip exponent

Diagnosis and Treatment of Primary Adult Renal Sarcoma

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Chinese Medical Sciences Journal 2011年第3期26卷 172-174页

作者： Zhong-ming Huang Han-zhong li zhi-gang Ji bing-bing Shi Department of Urology Peking Union Medical College HospitalChinese Academy of Medical Sciences ＆ Peking Union Medical CollegeBeijing 100730China

Objective To investigate the clinical characteristics of primary adult renal *** A total of 1654 cases with adult renal tumors were treated during 1985 to 2009 in Peking Union Medical College *** all,17 cases were diagnosed as primary renal sarcoma and underwent radical *** clinical features of 17 such patients were retrospectively *** The first symptom of 10(59%) cases in all renal sarcomas was abdominal *** pathological diagnosis was leiomyosarcoma(7 cases),rhabdomyosarcoma(2 cases),malignant fibrous histiocytoma(2 cases),low-differentiated sarcoma(2 cases),chromophobe renal cell carcinoma coexisting with liposarcoma(1 case),fibrosarcoma(1 case),embryonic sarcoma(1 case) and leiomyosarcoma(1 case).One patient died of tumor thrombus of the inferior vena cava during ***,15 cases were regularly followed up for 4 to 60 *** now,1 had tumor-free survival for 9 months,and the other 14 cases died 2-38 months after the operation with a median survival time of 18(range,5-60) *** median survival time of leiomyosarcoma group was 28(range,11-60) months,and 2 cases of malignant fibrous histiocytoma died 4 and 8 months after the operation *** The primary renal sarcoma has the clinical symptom similar with advanced renal cell carcinoma and has poor *** might have relative good prognosis.

关键词： renal sarcoma adult pathology

A comprehensive review on microchannel heat sinks for electronics cooling

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International Journal of Extreme Manufacturing 2024年第2期6卷 133-162页

作者： zhi-Qiang Yu Mo-Tong li bing-Yang Cao Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Engineering MechanicsTsinghua UniversityBeijing 100084People’s Republic of China

The heat generation of electronic devices is increasing dramatically,which causes a serious bottleneck in the thermal management of electronics,and overheating will result in performance deterioration and even device *** the development of micro-machining technologies,the microchannel heat sink(MCHS)has become one of the best ways to remove the considerable amount of heat generated by high-power *** has the advantages of large specific surface area,small size,coolant saving and high heat transfer *** paper comprehensively takes an overview of the research progress in MCHSs and generalizes the hotspots and bottlenecks of this *** heat transfer mechanisms and performances of different channel structures,coolants,channel materials and some other influencing factors are ***,this paper classifies the heat transfer enhancement technology and reviews the related studies on both the single-phase and phase-change flow and heat *** comprehensive review is expected to provide a theoretical reference and technical guidance for further research and application of MCHSs in the future.

关键词： microchannel heat sink thermal management of electronics microscale heat transfer heat transfer enhancement

Enhancing whole yeast genome rearrangements through multiple LoxPsym sequences

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Science China(life Sciences) 2024年第9期67卷 2045-2047页

作者： bing-zhi li Ying-Jin Yuan Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(Ministry of Education) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Frontiers Research Institute for Synthetic Biology Tianjin UniversityTianjin 300072China

Genomic rearrangements play a significant role in disease,evolution,and tumorigenesis(Mani and Chinnaiyan,2010).While single nucleotide polymorphisms(SNPs)and small insertions/deletions contribute substantially to gen... 详细信息

关键词： insertion sequences

Percutaneous cryosurgery for the treatment of hepatic colorectal metastases

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World Journal of Gastroenterology 2008年第9期14卷 1430-1436页

作者： Ke-Cheng Xu li-zhi Niu Wei-bing He Yi-Zi Hu Jian-Sheng Zuo Cryosurgery Center for Cancer Fuda Cancer Hospital Guangzhou Guangzhou 510300 Guangdong Province China

AIM:To determine the safety and efficacy of efficacy of percutaneous cryosurgery for treatment of patients with hepatic colorectal metastases. METHODS: Three hundred and twenty-six patients with non-resectable hepatic colorectal metastases underwent percutaneous cryosurgery under the guidance of ultrasound or CT. Follow-up was 1 mo after cryosurgery and then every 4 mo thereafter by assessment of tumor markers, liver ultrasonography, and abdominal CT. For lesions suspicious of recurrence, a liver biopsy was performed and subsequent repeat cryosurgery was given if histology was positive for cancer. RESULTS: All patients underwent a total of 526 procedures of cryosurgery. There were 151 patients who underwent repeat procedures of cryosurgery for recurrent tumors in the liver and extrahepatic places. At 3 mo after cryosurgery, carcinoembryonic antigen (CEA) levels in 197 (77.5%) patients who had elevated markers before cryosurgery decreased to normal range. Among 280 patients who received CT following-up, cryotreated lesions showed complete response (CR) in 41 patients (14.6%), partial response (PR) in 115 patients (41.1%), stable disease (SD) in 68 patients (24.3%) and progressive disease (PD) in 56 patients (20%). The recurrence rate was 47.2% during a median follow-up of 32 mo (range, 7-61). Sixty one percent of the recurrences were seen in liver only and 13.9% in liver and extrahepatic areas. The recurrence rate at cryotreated site was only 6.4% for all cases. During a median follow-up of 36 mo (7-62 mo), the median survival of all patient was 29 mo (range 3-62 mo). Overall survival was 78%, 62%, 41%, 34% and 23% at 1, 2, 3, 4 and 5 years, respectively, after the treatment. Patients with tumor size less than 3 cm, tumor in right lobe of liver, lower CEA levels (< 100 ng/dL) and post- cryosurgery TACE had higher survival rate. There wasno significant difference in terms of survival based on the number of tumors, pre-cryosurgery chemotherapy and the timing of the dev

关键词： Hepatic colorectal metastases Hepatic cryosurgery Percutaneous cryosurgery Colorectal cancer

Noise-Induced Transition in a Voltage-Controlled Oscillator Neuron Model

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Communications in Theoretical Physics 2008年第7期50卷 257-260页

作者： XIE Hui-Zhang liU Xue-Mei AI Bao-Quan liU liang-Gang li zhi-bing Department of Physics Sun Yat-Sen University Guangzhou 510275 China School of Physics South China University of Technology Guangzhou 510640 China School of Physics and Telecommunication Engineering South China Normal University Guangzhou 510631 China Faculty of Information Technology Macao University of Science and Technology Macao China

In the presence of Gaussian white noise,we study the properties of voltage-controlled oscillator neuronmodel and discuss the effects of the additive and multiplicative *** is found that the additive noise can accelerate andcounterwork the firing of neuron,which depends on the value of central frequency of neuron itself,while multiplicativenoise can induce the continuous change or mutation of membrane potential.

关键词： Gaussian white noise transition voltage-controlled oscillator neuron model

Endoscopic band ligation or endoscopic tissue adhesive injection in the treatment of gastric varices:Which is better?

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World Journal of Gastroenterology 2024年第21期30卷 2827-2828页

作者： li-zhi Yi Sheng-bing Zhao Department of Gastroenterology The People’s Hospital of LeshanLeshan 614000Sichuan ProvinceChina Department of Gastroenterology Changhai HospitalThe Second Military Medical University/Naval Medical UniversityShanghai 200433China

The combination of endoscopic ultrasound with endoscopic treatment of type 1 gastric variceal hemorrhage may improve the robustness and generalizability of the findings in future ***,the esophageal varices should also... 详细信息

关键词： Gastric varices Esophageal varices Endoscopic band ligation Endoscopic tissue adhesive injection Endoscopic ultrasound

Observation of ballistic-diffusive thermal transport in GaN transistors using thermoreflectance thermal imaging

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Rare Metals 2024年第1期43卷 389-394页

作者： zhi-Ke liu Yang Shen Han-ling li bing-Yang Cao Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Engineering MechanicsTsinghua UniversityBeijing 100084China

To develop effective thermal management strategies for gallium-nitride (GaN) transistors, it is essential to accurately predict the device junction temperature. Since the width of the heat generation in the devices is comparable to phonon mean free paths (MFPs) of GaN, phonon ballistic transport exists and can significantly affect the heat transport process.

关键词： temperature. transistors GaN

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高功率纳秒级激光二极管高侧驱动电路

激光与红外 2024年第2期54卷 171-178页

作者：金明泽王臣朱福杨信诚李智冰赵晓琛何伟基张闻文南京理工大学电子工程与光电技术学院江苏南京210094

纳秒级高功率的激光发射系统对激光雷达的探测性能产生重要影响。本文对普遍使用的激光二极管低侧栅极驱动电路进行修改得到高侧栅极驱动方式,使之能够适用于共阴极激光发射电路。该高侧驱动方式采用了一个半桥驱动器,两个GaN FET作为... 详细信息

纳秒级高功率的激光发射系统对激光雷达的探测性能产生重要影响。本文对普遍使用的激光二极管低侧栅极驱动电路进行修改得到高侧栅极驱动方式,使之能够适用于共阴极激光发射电路。该高侧驱动方式采用了一个半桥驱动器,两个GaN FET作为核心器件来控制激光二极管的发光。文中分析了该拓扑结构中电压、电容、电阻、电感等因素对流经激光器电流波形的影响。经过实验测试,在高重复频率下该电路能够产生3.1 ns脉冲宽度,约65 W的峰值功率,能够作为激光雷达的发射模块对场景进行扫描成像。

关键词：纳秒级高功率激光发射高侧栅极驱动共阴极高重复率