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光学技术 2008年第4期34卷 576-578,582页

作者：李今秀李均利魏平宁波大学数字技术与应用软件研究所浙江宁波315211 浙江大学计算机科学与技术学院杭州310027

根据医学图像的特点和人的视觉特性,提出了一种基于梯度的非线性伪彩色编码新方法。利用梯度算子得到图像的梯度场,并确定阈值。根据梯度值与阈值的比较,大于阈值的是基于梯度值的编码方法,用红色编码;否则是基于灰度值的编码方法。通... 详细信息

根据医学图像的特点和人的视觉特性,提出了一种基于梯度的非线性伪彩色编码新方法。利用梯度算子得到图像的梯度场,并确定阈值。根据梯度值与阈值的比较,大于阈值的是基于梯度值的编码方法,用红色编码;否则是基于灰度值的编码方法。通过定义的两个阈值界定范围,设计非线性的正弦函数来进行伪彩色编码。由于映射函数中的三个参数k_1,k_2和k_3,所以增加了算法的灵活性。通过实验比较,处理后的医学图像轮廓更清晰,层次感更强,能有效地突出病灶区,有利于医生的诊断。

关键词：医学图像梯度伪彩色编码滤波

Hilbert空间中分裂可行性问题的改进Halpern迭代和黏性逼近算法

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应用数学和力学 2017年第9期38卷 1072-1080页

作者：杨丽李军西华师范大学数学与信息学院四川南充637002

在无限维Hilbert空间中,提出了求解分裂可行性问题(SFP)的改进Halpern迭代和黏性逼近算法,证明了当参数满足一定条件时,由给定算法生成的序列强收敛到分裂可行性问题的一个解.这些结论推广了Deepho和Kumam近年来的一些结果.

关键词：分裂可行性问题改进Mann迭代和黏性逼近方法强收敛 Hilbert空间

Surgical treatment of multivessel lesions in Takayasu arteritis

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Chinese Medical Journal 2013年第24期126卷 4804-4805页

作者： DIAO Yong-peng liU Chang-wei SONG Xiao-jun CHEN Yue-xin GUO li-long liAN li-shan li Yong-jun Department of Vascular Surgery Peking Union Medical CollegeHospital Peking Union Medical College Chinese Academy ofMedical Science Beijing 100730 China

Takayasu arteritis （TA） is a chronic progressive nonspecific vasculitis that involves the aorta and itsmain branches, resulting in luminal stenosis in the large vessels. Steroid therapy is the foundation for TA treatment and the guarantee of surgery. When a patient presents with uncontrolled symptoms, surgical treatment is the only measure that may be adopted to prevent greater risk to life. However, surgical repair for extensive arteriopathy requires an ingenious design to avoid morbidity in response to the complexity of the pathophysiology of TA. A 41-year-old woman presented with pulselessness, recurrent dizziness, and visual disturbance for the past 23 years. The patient had been diagnosed with TA 13 years ago and had received steroid therapy. However, the symptoms of dizziness and visual disturbance had increased in intensity and duration over the last 2 years. Upon admission, physical examination revealed that pulse in both arms were absent. Her blood pressure was 98/63 mmHg （1 mmHg=0.133 kPa） in the left arm,

关键词： Takayasu arteritis surgical procedures, vascular grafting

Persistent depression is a predictor of quality of life in stroke survivors: results from a 5-year follow-up study of a Chinese cohort

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Chinese Medical Journal 2019年第18期132卷 2206-2212页

作者： li-jun li Xiao-Mei Yao Bo-Yuan Guan Qi Chen Ning Zhang Chun-Xue Wang Department of Neuropsychiatry Behavioral Neurology and Clinical Psychology Beijing Tiantan Hospital Capital Medical University Beijing 100070 China China National Clinical Research Centre for Neurological Diseases Beijing 100070 China Center of Stroke Beijing Institute for Brain Disorders Beijing 100070 China Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease Beijing 100070 China Department of Health Research Methods Evidence and Impact McMaster University Hamilton Ontario L9K 1R9 Canada Department of Psychology Capital Medical University Beijing 100069 China

Background:Whether the time course of post-stroke depression (PSD) can be used to predict the quality of life (QoL) of patients with late-stage stroke remains unclear,this study investigated whether persistent depression at 1 year after stroke predicts QoL at 5 years following ***:We analyzed the demographic and clinical data of patients with stroke in 56 hospitals across China that participated in the Prospective Cohort Study on the Incidence and Outcome of Patients with PSD in China ***-up assessments were performed at the following time points after stroke:in person,2 weeks,3 months,6 months,and 1 year;by telephone,5 *** Institutes of Health Stroke Scale (NIHSS) score on admission,recurrence,disability,depression,QoL,and chronic complications were *** was diagnosed using the Diagnostic and Statistical Manual of Mental *** was measured using short form-12 (SF-12).Multivariable ordinal logistic regression analysis was used to identify factors that independently affected the physical component summary (PCS) and mental component summary (MCS) scores of the ***:Of the 801 patients evaluated in this study,80 had persistent *** multivariable regression analysis of data obtained at 5 years showed that persistent depression at 1 year (odds ratio [OR]:0.48;95% confidence interval [CI]:0.29-0.81) and disability at 5 years (OR:0.34;95% CI:0.23-0.49) were associated with poor MCS scores at 5 *** age,a high NIHSS score on admission,disability at 5 years,and stroke recurrence within 5 years were associated with poor PCS scores at the 5-year ***:Persistent depression at the 1-year follow-up could predict poor MCS scores at the 5-year *** development of interventional strategies targeting post-stroke patients with persistent depression is warranted.

关键词： Depression Quality of life Stroke Predictor

Intracoronary nitroprusside in the prevention of the no-reflow phenomenon in acute myocardial infarction

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Chinese Medical Journal 2009年第22期122卷 2718-2723页

作者： PAN Wei WANG Lan-feng YU Jia-hui FAN Ying YANG Shu-sen ZHOU li-jun li Yue li Wei-min Cardiology Department of the First Affiliated Hospital of Harbin Medical University Harbin Heilongjiang 150001 China

Background No-reflow phenomenon during percutaneous coronary intervention （PCI） for acute myocardial infarction （AMI） is a predictive factor of continuous myocardial ischemia, ventricular remodeling and cardiac dysfunction, which is closely associated with a worse prognosis. This study aimed to evaluate intracoronary nitroprusside in the prevention of the no-reflow phenomenon in AMI.Methods Ninety-two consecutive patients with AMI, who underwent primary PCI within 12 hours of onset, were randomly assigned to 2 groups： intracoronary administration of nitroprusside （group A, n=46）, intracoronary administration of nitroglycerin （group B, n=46）. The angJographic results were observed. The real-time myocardial contrast echocardiography （RT-MCE）, including contrast score index （CSI）, wall motion score index （WMSI）, transmural contrast defect length （CDL） and serious WM abnormal length （WML） were recorded at 24 hours and 1 week post-PCI. High sensitivity C-reactive protein （Hs-CRP） was examined by immune rate nephelometry. N-terminal prohormone brain natriuretic peptide （NT-proBNP） was tested with enzyme-linked immunosorbent assay. Patients were followed up for six months. Major adverse cardiac events （MACE） were recorded. Results The incidence of final TIMI-3 flow in group A was much higher than that in Group B （P 〈0.05）, final corrected TIMI frame count （cTFC） in group A decreased significantly than that in group B （P 〈0.01）. The CSI, CDL/LV length, WMSI and WL/LV length in group A were significantly lower than that in group B （P 〈0.01）. Levels of Hs-CRP and NT-proBNP at 1 week post-PCI decreased significantly in group A than that in group B （P 〈0.01）. Patients were followed up for 6 months and the incidence of MACE in group A was significantly lower than that in group B （P〈0.05）.Conclusion Intracoronary nitroprusside can improve myocardial microcirculation, leading to the decrease of the incidence of no-reflow phenomenon and better prognosis.

关键词： nitroprusside acute myocardial infarction no-reflow phenomenon prognosis

大跨度钢管混凝土拱桥的非线性空气静力稳定性

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华南理工大学学报（自然科学版） 2005年第12期33卷 87-91页

作者：颜全胜李立军华南理工大学交通学院广东广州510640 广州地铁总公司广东广州510038

同时考虑静风荷载非线性和结构几何非线性的影响,运用增量迭代法分析了大跨度钢管混凝土拱桥成桥状态下的非线性空气静力稳定性,编制了相应的计算程序,并结合一座主跨为368m的钢管砼拱桥———茅草街大桥进行了计算,讨论了风荷载的非线... 详细信息

同时考虑静风荷载非线性和结构几何非线性的影响,运用增量迭代法分析了大跨度钢管混凝土拱桥成桥状态下的非线性空气静力稳定性,编制了相应的计算程序,并结合一座主跨为368m的钢管砼拱桥———茅草街大桥进行了计算,讨论了风荷载的非线性、风力的初始攻角、矢跨比、横撑设置等参数对大跨度钢管混凝土拱桥侧向稳定性的影响.

关键词：大跨度钢管混凝土拱桥静风效应空气静力稳定性几何非线性

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稠油炼化污水处理用聚合硅磷硫酸铁的制备

东北大学学报（自然科学版） 2009年第1期30卷 137-140页

作者：徐新阳李立君李茹东北大学资源与土木工程学院辽宁沈阳110004 哈尔滨工业大学市政环境工程学院黑龙江哈尔滨150001

以硫酸亚铁为主要材料,通过添加活化硅酸等组分,制备了一种新型的聚合硅磷硫酸铁絮凝剂.确定了其制备过程中的影响因素并通过实验确定了最佳制备条件:硫酸亚铁质量分数为55%,硅酸钠质量分数为15%,亚铁与双氧水用量的摩尔比为1.2∶1,氧... 详细信息

以硫酸亚铁为主要材料,通过添加活化硅酸等组分,制备了一种新型的聚合硅磷硫酸铁絮凝剂.确定了其制备过程中的影响因素并通过实验确定了最佳制备条件:硫酸亚铁质量分数为55%,硅酸钠质量分数为15%,亚铁与双氧水用量的摩尔比为1.2∶1,氧化温度40℃,氧化时间4 h,聚合温度60℃,聚合时间2 h.通过均匀设计实验确定了制备聚合硅磷硫酸铁絮凝剂最佳组分:铁硅摩尔比为5.0∶1,铁酸摩尔比为3.2∶1,铁磷摩尔比为18.0∶1.在实验室最佳条件下,用制备得到的絮凝剂对稠油炼化污水进行絮凝处理,油的去除率可达到94.1%.

关键词：聚合硅磷硫酸铁混凝絮凝剂稠油炼化污水

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聚合硅磷硫酸铁处理稠油石化污水的研究

东北大学学报（自然科学版） 2009年第11期30卷 1662-1665页

作者：徐新阳李立君李茹东北大学资源与土木工程学院辽宁沈阳110004 哈尔滨工业大学市政环境工程学院黑龙江哈尔滨150001

以实验室合成的聚合硅磷硫酸铁和聚丙烯酰胺为絮凝剂,系统研究了絮凝剂用量、pH值、温度、搅拌时间和沉淀时间对辽河石化分公司稠油石化污水絮凝效果的影响,确定了聚合硅磷硫酸铁的最佳使用条件:质量浓度为200mg/L,pH值为6～9,温度为25... 详细信息

以实验室合成的聚合硅磷硫酸铁和聚丙烯酰胺为絮凝剂,系统研究了絮凝剂用量、pH值、温度、搅拌时间和沉淀时间对辽河石化分公司稠油石化污水絮凝效果的影响,确定了聚合硅磷硫酸铁的最佳使用条件:质量浓度为200mg/L,pH值为6～9,温度为25～45℃,搅拌时间为2min,沉淀时间为3min.聚合硅磷硫酸铁和辽河石化分公司现场使用絮凝剂的对比实验结果表明,聚合硅磷硫酸铁对油、COD、硫、酚的平均去除率分别为94.1%,69.4%,88.9%和43.5%,明显高于现场使用药剂的80.5%,35.8%,21.1%和17.3%.

关键词：聚合硅磷硫酸铁稠油石化污水絮凝去除率

Anomalous pancreaticobiliary junction: image analysis and treatment principles

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Hepatobiliary & Pancreatic Diseases International 2004年第1期3卷 136-139页

作者： Ze-li Yu, li-jun Zhang, Jian-Zhu Fu, Jie li, Qing-Yu Zhang and Fou-Lai Chen Beijing, China Department of General Surgery, Beijing Tongren Hospital, Capital University of Medical Sciences, Beijing 100730, China Department of General Surgery Beijing Tongren Hospital Capital University of Medical Sciences Beijing 100730 China. zhlj1968@***

BACKGROUND: Anomalous pancreaticobiliary junction is often associated with biliary tract carcinoma and acute pan- creatitis. We assessed the value of image analysis in the diag- nosis of patients with anomalous pancreaticobiliary junction (APBJ) and the principles for the treatment of APBJ. METHODS: Sixty-four patients with APBJ were subjected to ultrasound imaging, endoscopic retrograde cholangio- pancreatography (ERCP) and magnetic resonance cholan- giopancreatography (MRCP) before surgery. The diagnos- tic accuracy of image analysis and their surgical outcomes were evaluated retrospectively. RESULTS: On ERCP and MRCP, the length of the com- mon channel was calculated to be 15 mm or longer in all patients, and the angle of the junction was more than 75° in 49 (76.6%) of the 64 patients. Of the 64 patients, 28 were defined of pancreatic duct type (P-C) (28/64, 43.75%), 32 bile duct type (C-P) (32/64, 50%), and 4 common chan- nel type (4/64, 6.25%). CONCLUSIONS: Patients with APBJ are often associated with biliary tract and pancreatic diseases, and early detec- tion and correct surgical treatment could avoid serious complications. ERCP and MRCP are accurate in the diag- nosis of APBJ.

关键词： anomalous pancreaticobiliary junction image examination surgical treatment