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Numerical Simulation of Thermal Stress of Shaped Casting Based on Rheological Model

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Journal of Materials Science & Technology 1999年第3期15卷 267-270页

作者： kang, jw Liu, BC Xiong, SM Tsing Hua Univ Dept Mech Engn Beijing 100084 Peoples R China

In order to study the thermal stresses at the mushy zone, a three dimensional rheological model [H]-[H\N]-[N\S] including elastic, visco-elastic and visco-plastic elements was established, its algorithm and codes for finite element method were also developed. A FDM/FEM integrated analysis system of thermal stresses was built based on the integration of this procedure with thermal analysis by finite difference method. A steel sample casting with a hot spot was simulated in order to validate this system, and the calculated and experimental results were in good agreement.

关键词： Alloys

Hypersensitivity and its application to structural analysis of lanthanide complexes

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Chinese Journal of Chemistry 1997年第1期15卷 49-53页

作者： Yang, W Chen, M Gao, JZ Yang, WD kang, jw Yang, HW NW NORMAL UNIV DEPT PHYSLANZHOU 730070GANSUPEOPLES R CHINA

Hypersensitivity of the ternary complexes Ln(beta-dik)(4)HMQ(where Ln=Nd, Ho, Er, beta-dik=acetylacetonate(AA), dibenzoylmethanate(DBM) and MQ=4-methylquinoline) in acetone solution is studied based on the dynamic coupling model. The structures of these complexes in solution are deduced. Their coordination polyhedrons are all distorted square antiprism. Neodymium complexes have D-2 symmetry, while holmium and erbium complexes have exact D-2d symmetry.

关键词： hypersensitivity structural analysis lanthanide ternary complexes

Solid-liquid Extraction Spectrophotometric Determination of Copper with 2,9-dimethyl-1,10-phenanthroline

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Rare Metals 2001年第4期20卷 213-216页

作者： Peng, B Gao, JZ Hu, GL Fan, HY kang, jw Deng, HL NW Normal Univ Dept Chem Lanzhou 730070 Peoples R China

Solid liquid extraction of copper ion (I) with 2, 9-dimethyl-1, 10-phenanthroline (neo-cuproine, DMP) into molten naphthalene followed by chloroform spectrophotometric determination has been studied experimentally. The ternary complex Cu(I)-DMP-ClO4 was extracted quantitatively into molten naphthalene in the range of pH from 5 to 6 at 85 C-. Absorbance was spectrophotometrically determined at 459 nm against the reagent blank after the solid naphthalene layer was anhydrously dissolved in chloroform. Beer's law is obeyed over a concentration range of 0.5-70 mug/mL. The molar absorptivity and Sandell's sensitivity are 1.0x10(4) L/(mol(.)cm) and 0.0099 mug(.)cm(2) respectively. In addition, the various conditions on determination and the interference of coexisted ions were discussed, and the method was applied to the determination of copper ion both in tea samples and cadmium sulfate reagents. The results are in good agreement with those obtained by ICP AES method.

关键词： solid-liquid extraction spectrophotometric determination molten naphthalene copper DMP

一种人体气道树快速自动提取算法的医学评价和应用

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中国生物医学工程学报 2014年第5期31卷 635-640页

作者：齐守良李争华岳勇徐明杰 HAN jw van Triest 康雁东北大学中荷生物医学与信息工程学院沈阳110819 中国医科大学附属盛京医院沈阳110004

为了将提出的气道自动提取算法应用到实际临床,首先由高年资放射科医生将算法分割结果与解剖结构进行了对比。然后,分别考察了重建滤波器和层间距(或重叠率)对分割结果的影响。最后,作为例子将提取算法应用到三大类气道疾病:气道形态改... 详细信息

为了将提出的气道自动提取算法应用到实际临床,首先由高年资放射科医生将算法分割结果与解剖结构进行了对比。然后,分别考察了重建滤波器和层间距(或重叠率)对分割结果的影响。最后,作为例子将提取算法应用到三大类气道疾病:气道形态改变、气道扩张性病变和狭窄性病变。结果表明,算法可精确提取第4级支气管和大多数第5级支气管,最高可达12级支气管,支气管分支数量达170余个。高对比的重建滤波器和小的层间距(或高重叠率)对于分割结果有利。气道提取和3D可视化能直观显示更多细节,对于气道形态改变、气道扩张性病变和狭窄性病变诊断具有重要参考价值。

关键词： CT影像支气管树重建滤波器层间距呼吸疾病

Association of perioperative blood pressure with long-term survival in rectal cancer patients

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Chinese Journal of Cancer 2016年第6期35卷 20-29页

作者： Hui-Chuan Yu Yan-Xin Luo Hui Peng Xiao-Lin Wang Zi-Huan Yang Mei-Jin Huang Liang kang Lei Wang Jian-Ping Wang Department of Colon and Rectum Surgery The Sixth Affiliated Hospital(Guangdong Gastrointestinal and Anal Hospital)Sun Yat-sen UniversityGuangzhouGuangdong 510655PRChina Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Disease The Sixth Affiliated Hospital (Guangdong Gastrointestinal and Anal Hospital)Sun Yat-sen UniversityGuangzhouGuangdong 510665PRChina

Background:Several studies suggested that hypertension is positively related to cancer incidence and *** this study,we investigated the association between perioperative blood pressure(BP) and long?term survival out?comes in patients with rectal ***:This study included a cohort of 358 patients with stages I–III rectal cancer who underwent a curative resection between June 2007 and June *** pre? and postoperative BPs were measured,by which patients were grouped(low BP:<120/80 mm Hg;high BP:ints were di≥120/80 mm Hg).The survival outcomes were compared between these two *** primary endposease?free survival(DFS) and cancer?specific survival(CSS).Results:Univariate analysis showed that patients with high preoperative systolic BP had lower 3?year DFS(67.2% vs.82.1%,P = 0.041) and CSS rates(81.9% vs.94.8%,P = 0.003) than patients with low preoperative systolic BP,and the associations remained significant in the Cox multivariate analysis,with the adjusted hazard ratios equal to 1.97 [95% confidence interval(CI) = 1.08–3.60,P = 0.028] and 2.85(95% CI = 1.00–8.25,P = 0.050),***,in postoperative evaluation,patients with high systolic BP had significantly lower 3?year CSS rates than those with low systolic BP(78.3% vs.88.9%,P = 0.032) in univariate ***,high pre? and/or postoperative systolic BP presented as risk factors for CSS in the subgroups of patients who did not have a history of hypertension,with and/or without perioperative administration of antihypertensive ***:High preoperative systolic BP was an independent risk factor for both CSS and DFS rates,and high postoperative systolic BP was significantly associated with a low CSS rate in rectal cancer ***,our results suggest that rectal cancer patients may get survival benefit from BP control in perioperative ***,further studies should be conducted to determine the association between BP and CSS and targets of BP cont

关键词： Blood pressure Radical surgery Rectal cancer Cancer-specific survival

环氧乙烷-四氢呋喃共聚醚型燃气发生剂燃烧物理模型

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推进技术 2008年第1期29卷 98-101页

作者：唐根邓康清湖北航天化学技术研究所湖北襄樊441003

通过差热-热重联用、扫描电镜和单幅摄影等实验手段,研究了环氧乙烷-四氢呋喃共聚醚/高氯酸铵/降温剂燃气发生剂燃烧机理,在AP复合推进剂的多火焰燃烧(BDP)模型基础上,建立了其燃气发生剂燃烧物理模型。认为燃气发生剂燃烧模型中存在四... 详细信息

通过差热-热重联用、扫描电镜和单幅摄影等实验手段,研究了环氧乙烷-四氢呋喃共聚醚/高氯酸铵/降温剂燃气发生剂燃烧机理,在AP复合推进剂的多火焰燃烧(BDP)模型基础上,建立了其燃气发生剂燃烧物理模型。认为燃气发生剂燃烧模型中存在四个火焰区,分别为PF焰、AP焰、Pjw焰及FF焰,并运用该燃烧物理模型解释了燃烧中特殊现象(如燃速低、易熄火等)产生的原因。

关键词：燃气发生器推进剂燃烧机理物理模型

基于Hausdroff距离的扩展模糊数相似性测度

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上海交通大学学报 2005年第4期39卷 614-617页

作者：杜峰施文康邓勇上海交通大学电子信息与电气工程学院上海200030

提出了一种新的度量扩展模糊数相似性的新方法.在分析了现有几种相似性测度原理的基础上,指出了它们的不足之处,通过将每个扩展模糊数当作图像样本,并引入了模式识别领域中Hausdroff距离,构造了新的相似性测度公式.多组数值算例表明,该... 详细信息

提出了一种新的度量扩展模糊数相似性的新方法.在分析了现有几种相似性测度原理的基础上,指出了它们的不足之处,通过将每个扩展模糊数当作图像样本,并引入了模式识别领域中Hausdroff距离,构造了新的相似性测度公式.多组数值算例表明,该方法可以有效地度量扩展模糊数之间的相似性.

关键词：扩展模糊数相似性测度 Hausdroff距离

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时间序列分析的随机集方法

上海交通大学学报 2005年第3期39卷 400-404页

作者：陈良洲施文康上海交通大学电子信息与电气工程学院上海200030

通过建模仿真,对有独立观测值的统计方法进行估计、预测和控制,并提出了一种新的解决时间序列分析的方法.由全集中某些指定数值的最邻近域诱导出一种局部不确定的随机集模型,在"模糊集"的基础上将统计目标整合到基于规则的系统中.实例... 详细信息

通过建模仿真,对有独立观测值的统计方法进行估计、预测和控制,并提出了一种新的解决时间序列分析的方法.由全集中某些指定数值的最邻近域诱导出一种局部不确定的随机集模型,在"模糊集"的基础上将统计目标整合到基于规则的系统中.实例结果分析表明,随机集模型是一种很好的时间序列分析方法.

关键词：时间序列分析数据融合系统辨识随机集单点覆盖函数

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基于随机集的复杂境况下多目标测量

上海交通大学学报 2007年第6期41卷 881-884页

作者：陈良洲施文康华中科技大学仪器科学与技术系武汉430074 上海交通大学仪器科学与工程系上海200240

在多传感器多目标融合系统中,多传感器所提供的信息常常不同类,难以融合,建立多传感器多目标的随机集观测模型可以解决统一融合问题.基于随机集理论,根据虚警及漏测的情况,给出了目标的信任测度及其全局密度.从单传感器单目标推广到多... 详细信息

在多传感器多目标融合系统中,多传感器所提供的信息常常不同类,难以融合,建立多传感器多目标的随机集观测模型可以解决统一融合问题.基于随机集理论,根据虚警及漏测的情况,给出了目标的信任测度及其全局密度.从单传感器单目标推广到多传感器多目标,建立了实用的多目标随机集测量模型,并根据实例证明了该模型的实用性和有效性.

关键词：多目标测量随机集杂波信任测度全局密度