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DIRECT NUMERICAL SIMUIATION OF BUBBLE-CLUSTER’S DYNAMIC CHARACTERISTICS

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Journal of Hydrodynamics 2008年第6期20卷 689-695页

作者： CHEN Hui li sheng-cai ZUO Zhi-gang li Shuai School of Power and Energy Northwestern Polytechnical University Xi＇an 710072 China School of Engineering University of Warwick Coventry CV4 7AL UK

A Direct Numerical Simulation （DNS） for understanding the dynamic response of bubble cluster to pulses of pressure perturbations has been studied by using a front-tracking method. The results show that owing to high nonlinearity, the bubble shape and volume oscillations caused by passing by pressure wave will be transformed into an in-phase volumetric oscillation of whole bubble cluster at a particular low-frequency. The value of the frequency is independent of the pulse excitations but the characteristics of the bubble cluster such as its bubble size, bulk void fraction and its spacial distribution etc. It is believed that this study provides important information for us to understand the coupling mechanism of cavitation cloud involved in cavitation resonance, a phenomenon noticed by one of the authors more than two decades ago.

关键词： numerical simulation cavitation dynamics

Shear-resistant behavior of light composite shear wall

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Journal of Central South University 2015年第7期22卷 2768-2775页

作者：李升才董毓利 School of Civil Engineering Huaqiao University

Shear test results for a composite wall panel in a light composite structure system are compared with test results for shear walls in *** analysis results show that this kind of composite wall panel works very well,and can be regarded as a solid *** composite wall panel with a hidden frame is essential for bringing its effect on shear resistance into full *** analysis of the shear-resistant behavior of the composite wall panel suggests that the shear of the composite shear wall panel can be controlled by the cracking strength of the web shearing diagonal crack.

关键词： composite shear wall shear test hidden frame shear design cracking strength shearing diagonal crack

AN ATTRIBUTION OF CAVITATION RESONANCE:VOLUMETRIC OSCILLATIONS OF CLOUD

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Journal of Hydrodynamics 2009年第2期21卷 152-158页

作者： ZUO Zhi-gang li sheng-cai liU Shu-hong li Shuang CHEN Hui School of Engineering University of Warwick Coventry CV4 7AL UK Department of Thermal Engineering Tsinghua University Beijing 100084 China School of Engineering University of Warwick Coventry CV4 7AL UK School of Power and Energy Northwestern Polytechnical University Xi＇ an 710072 China

In order to further verify the proposed theory of cavitation resonance, as well as to proceed the investigations into microscopic level, a series of studies are being carried out on the Warwick venturi. The analysis of the oscillation characteristics of the cavitation resonance has conclusively verified the macro-mechanism proposed through previous studies on other cavitating flows by the authors. The initiai observations using high-speed photographic approach have revealed a new attribution of cavitation resonance. That is, the volumetric oscillation of cavitation cloud is associated with the cavitation resonance, which is a collective behaviour of the bubbles in the cloud.

关键词： cavitation resonance volumetric oscillation macro-mechanism

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带框复合墙板承载力计算的简化模型与方法

工程力学 2007年第12期24卷 140-145,157页

作者：李升才华侨大学土木工程学院福建泉州362021

建立了带框复合剪力墙板承载力计算的简化模型——带有等效斜撑的刚架,模型中考虑了复合墙板随刚度变化而产生的内力重分布现象,确定了等效斜撑的宽度和钢筋面积。基于对作为等效斜撑的夹芯板的承载力和作为刚架的边框的承载力以及复合... 详细信息

建立了带框复合剪力墙板承载力计算的简化模型——带有等效斜撑的刚架,模型中考虑了复合墙板随刚度变化而产生的内力重分布现象,确定了等效斜撑的宽度和钢筋面积。基于对作为等效斜撑的夹芯板的承载力和作为刚架的边框的承载力以及复合墙板抗滑移承载力计算方法的分析,提出了带框复合剪力墙板的极限承载力计算方法。将简化模型计算结果与试验结果进行了对比分析,分析表明:应用该承载力计算的简化模型和方法分析的结果与试验结果吻合较好,说明该模型和计算方法是带框复合墙板承载力计算的一种有效的简化模型与方法。

关键词：带框复合墙板计算模型带有等效斜撑的刚架承载力计算方法试验结果

轻型复合结构抗震性能分析(Ⅱ)——结构的滞回曲线、位移反应、基底剪力反应规律

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北京工业大学学报 2008年第9期34卷 944-949页

作者：李升才江见鲸华侨大学土木工程学院福建泉州362021 清华大学土木工程系北京100084

作为轻型复合结构抗震性能分析的第Ⅱ部分.对该结构1/2模型进行了拟动力和拟静力试验研究,并对该模型进行了空间有限元弹塑性地震反应分析.对结构模型的滞回曲线、位移反应、基底剪力反应规律的试验结果进行了分析比较.理论分析与试验... 详细信息

作为轻型复合结构抗震性能分析的第Ⅱ部分.对该结构1/2模型进行了拟动力和拟静力试验研究,并对该模型进行了空间有限元弹塑性地震反应分析.对结构模型的滞回曲线、位移反应、基底剪力反应规律的试验结果进行了分析比较.理论分析与试验结果吻合较好,空间有限元弹塑性地震反应分析可用于该结构的抗震设计;由于结构刚度较大,周期较小,随着裂缝的出现和开展,结构的刚度会逐渐减小,周期会逐渐加大,渐渐接近场地土的卓越周期而产生共振现象,因此,对刚度较大的结构抗震设计时,避开场地土的卓越周期非常必要.

关键词：轻型复合结构抗震性能滞回曲线位移反应基底剪力反应

Surgery Versus Stereotactic Radiosurgery for Single Synchronous Brain Metastasis from Non-Small Cell Lung Cancer

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Chinese Journal of Cancer Research 2009年第1期21卷 56-60页

作者： Hui li sheng-cai HOU Bin HU Tong li Yang Wang Jin-bai Miao Bin You Yi-li Fu Department of Thoracic Surgery Beijing Chaoyang Hospital Capital Medical UniversityBeijing 100020 China

Objective： The aim of this study is to compare the effectiveness of surgery with stereotactic radiosurgery （SRS） for patients with a single synchronous brain metastasis from successfully treated non-small cell lung cancer. Methods： Between 1995 and 2002, 53 patients underwent resection of both primary non-small cell lung cancer and the associated single brain metastasis. There were 33 men and 20 women with a mean age of 57 years （range, 32-85 years）. At the time of diagnosis, 42 patients experienced lung cancer related symptoms, whereas 11 patients experienced brain metastases-related symptoms. 42 patients had received thoracic surgery first, and 11 patients had undergone neurosurgery or radiosurgery first. Pneumonectomy was performed in 9 out of 42 patients （21.4%）, lobectomies in 30 （71.4%）, and wedge resection in 3 （7.2%）. 48 patients （90.5%） underwent complete lymphadenectomy. 35 patients underwent brain metastasectomy. 18 underwent SRS. Results： There was no postoperative mortality and severe complications after either lung or brain surgery. Histology showed 34 adenocarcinomas, 16 squamous cell carcinomas, and 3 large cell lung cancers. 15 patients （28.3%） had no evidence of lymph node metastases （No）, 20 patients （37.7%） had hilar metastases （N1）, and 18 patients （34%） had mediastinal metastases （N2）. The 1-, 2-, 3- and 5-year overall survival rates were 49%, 19%, 10%, and 5%, respectively. The corresponding data for neurosurgery group were 55%, 17%, 11%, and 6%, respectively. The median survival time was 13 months. For SRS group the corresponding data were 44.8%, 20.9% 10.5%, and 2%, respectively. The median survival time was 14 months. The differences between the two groups were not significant （P〉0.05）. In lymph node negative patients （No）, the overall 5-year survival rate was 10%, as compared with a 1% survival rate in patients with lymph node metastases （N1-2）. The difference was significant （P〈0,01）. For adenocarcinomas, the 5-year survival rate was 5%

关键词： Non-small cell lung cancer (NSCLC) Synchronous brain metastasis Surgery Stereotacticradiosurgery (SRS)

应用Monte Carlo方法模拟爆轰产物状态方程的研究进展

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高压物理学报 2005年第3期19卷 275-278页

作者：马义刚李生才北京理工大学爆炸科学与技术国家重点实验室

应用Monte Carlo方法模拟爆轰产物状态方程,区别于建立在球形分布分子势基础上的传统爆轰产物状态方程计算方法,从原子水平上直接模拟实际炸药的爆轰产物状态方程,克服了传统方法中混合产物状态方程不精确的缺点。综述了该方法的历史背... 详细信息

应用Monte Carlo方法模拟爆轰产物状态方程,区别于建立在球形分布分子势基础上的传统爆轰产物状态方程计算方法,从原子水平上直接模拟实际炸药的爆轰产物状态方程,克服了传统方法中混合产物状态方程不精确的缺点。综述了该方法的历史背景及发展现状。对模拟中宏观量的描述、统计平均的计算、势函数的选取及边界条件进行了详尽描述。

关键词：爆轰产物状态方程 Monte Carlo方法

Short- and long-term outcomes of lung volume reduction surgery

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Chinese Medical Journal 2006年第9期119卷 769-773页

作者： li Tong HOU sheng-cai li Hui HU Bin MIAO Jin-bai ZHANG Zhen-kui WANG Yang FU Yi-li YOU Bin Department of Thoracic Surgery Beijing Chaoyang Hospital Capital University of Medical Sciences Beijing 100020 China

In 1957, Brantigan applied lung volume reduction surgery （LVRS） to the treatment of emphysema. In 1995, Cooper reused this operation and obtained remarkable benefit in patients with chronic obstructive pulmonary disease （COPD）. Although there are still some doubts about the effect of LVRS, in the past 10 years, a lot of clinical information approved that LVRS can give benefit to more than 70% of COPD patients. At present, a series of researches in long-term investigation and function evaluation such as NETT have got elementary affirmative conclusion about some disputative problems.

关键词： chronic obstructive pulmonary disease lung volume reduction surgery early-term result long-term result

Machine learning identifies the risk of complications after laparoscopic radical gastrectomy for gastric cancer

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World Journal of Gastroenterology 2024年第1期30卷 79-90页

作者： Qing-Qi Hong Su Yan Yong-liang Zhao lin Fan li Yang Wen-Bin Zhang Hao liu He-Xin lin Jian Zhang Zhi-Jian Ye Xian Shen li-sheng cai Guo-Wei Zhang Jia-Ming Zhu Gang Ji Jin-Ping Chen Wei Wang Zheng-Rong li Jing-Tao Zhu Guo-Xin li Jun You Department of Gastrointestinal Oncology Surgery The First Affiliated Hospital of Xiamen UniversitySchool of MedicineXiamen 361001Fujian ProvinceChina Department of Gastrointestinal Surgery Qinghai University Affiliated HospitalXining 810000Qinghai ProvinceChina Department of General Surgery and Center of Minimal Invasive Gastrointestinal Surgery The First Hospital Affiliated to Army Medical UniversityChongqing 400038China Department of General Surgery The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710061Shaanxi ProvinceChina Department of General Surgery The First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029Jiangsu ProvinceChina Department of Gastrointestinal Surgery The First Affiliated Hospital of Xinjiang Medical UniversityUrmuqi 830054Xinjiang Uygur Autonomous RegionChina Department of General Surgery Nanfang HospitalSouthern Medical UniversityGuangzhou 510515Guangdong ProvinceChina Department of Gastrointestinal Surgery Affiliated Hangzhou First People's HospitalZhejiang University School of MedicineHangzhou 310006Zhejiang ProvinceChina Department of Gastrointestinal Surgery Zhongshan Hospital of Xiamen UniversityXiamen 361004Fujian ProvinceChina Department of Surgery The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina Department of General Surgery Unit 4 Zhangzhou Affiliated Hospital of Fujian Medical UniversityZhangzhou 363000Fujian ProvinceChina Department of Gastrointestinal Surgery The Second Affiliated Hospital of Xiamen Medical CollegeXiamen 361021Fujian ProvinceChina Department of Gastrointestinal Nutrition and Hernia Surgery The Second Hospital of Jilin UniversityChangchun 130041Jilin ProvinceChina Department of Digestive Diseases Xijing HospitalAir Force Military Medical UniversityXi'an 710032Shaanxi ProvinceChina Department of Gastrointestinal Surgery Quanzhou First Hospital Affiliated to Fujian Medical UniversityQuanzhou 362002Fujian Provin

BACKGROUND Laparoscopic radical gastrectomy is widely used,and perioperative complications have become a highly concerned *** To develop a predictive model for complications in laparoscopic radical gastrectomy for gastric cancer to better predict the likelihood of complications in gastric cancer patients within 30 days after surgery,guide perioperative treatment strategies for gastric cancer patients,and prevent serious *** In total,998 patients who underwent laparoscopic radical gastrectomy for gastric cancer at 16 Chinese medical centers were included in the training group for the complication model,and 398 patients were included in the validation *** clinicopathological data and 30-d postoperative complications of gastric cancer patients were *** machine learning methods,lasso regression,random forest,and artificial neural networks,were used to construct postoperative complication prediction models for laparoscopic distal gastrectomy and laparoscopic total gastrectomy,and their prediction efficacy and accuracy were *** The constructed complication model,particularly the random forest model,could better predict serious complications in gastric cancer patients undergoing laparoscopic radical *** exhibited stable performance in external validation and is worthy of further promotion in more *** Using the risk factors identified in multicenter datasets,highly sensitive risk prediction models for complications following laparoscopic radical gastrectomy were *** hope to facilitate the diagnosis and treatment of preoperative and postoperative decision-making by using these models.

关键词： Gastric cancer Laparoscopic radical gastrectomy Postoperative complications Laparoscopic total gastrectomy