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On the Gerber-Shiu Discounted Penalty Function for a Surplus Process Described by PDMPs

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Acta Mathematica Sinica,English Series 2010年第5期26卷 951-962页

作者： jing min he Rong WU College of Science Tianjin University of Technology Tianjin 300384 P. R. China School of Mathematical Sciences Nankai University Tianjin 300071 P. R. China

In this paper, we investigate the Gerber-Shiu discounted penalty function for the surplus process described by a piecewise deterministic Markov process （PDMP）. We derive an integral equation for the Gerber-Shiu discounted penalty function, and obtain the exact solution when the initial surplus is zero. Dickson formulae are also generalized to the present surplus process.

关键词： Gerber-Shiu discounted penalty function piecewise deterministic Markov process ulti- mate ruin probability Volterra integral equation

Smoothness of Certain Functions in Two Kinds of Risk Models with a Barrier Dividend Strategy

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Acta Mathematicae Applicatae Sinica 2010年第4期26卷 661-668页

作者： Wei Wang jing-min he Rong Wu School of Mathematical Sciences and LPMC Nankai UniversityTianjin 300071China College of Science Tianjin University of TechnologyTianjin 300191China

In this paper,we study the smoothness of certain functions in two kinds of risk models with a barrier dividend *** using technique from the piecewise deterministic Markov processes theory,we prove that the function is continuously differentiable in the first risk *** the weak infinitesimal generator method of Markov processes,we prove that the function is twice continuously differentiable in the second risk ***-differential equations satisfied by them are derived.

关键词： Piecewise deterministic Markov process weak infinitesimal generator barrier strategy

Ruin Probabilities of a Surplus Process Described by PDMPs

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Acta Mathematicae Applicatae Sinica 2008年第1期24卷 117-128页

作者： jing-min he Rong Wu Hua-yue Zhang Department of Mathematics and LPMC Nankai University Tianjin 300071 China

In this paper we mainly study the ruin probability of a surplus process described by a piecewise deterministic Markov process （PDMP）. An integro-differential equation for the ruin probability is derived. Under a certain assumption, it can be transformed into the ruin probability of a risk process whose premiums depend on the current reserves. Using the same argument as that in Asmussen and Nielsen, the ruin probability and its upper bounds are obtained. Finally, we give an analytic expression for ruin probability and its upper bounds when the claim-size is exponentially distributed.

关键词： Ruin probability piecewise deterministic Markov process integro-differential equation volterra equation

~3H-胸腺嘧啶核苷参入法测定胰岛素促生长活性

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Acta Biochimica et Biophysica Sinica 1997年第1期29卷 88-91页

作者：史民景乃禾冯佑民中国科学院上海生物化学研究所分子生物学国家重点实验室中国科学院上海生物化学研究所分子生物学国家重点实验室 200031

利用3H-胸腺嘧啶核苷参入方法,在24孔板和96孔板培养的小鼠乳腺癌细胞GR2H6中,建立了胰岛素促细胞生长活性的测定体系。无血清培养条件下,胰岛素可以刺激GR2H6细胞的DNA合成,其最大刺激比对照组提高了3～5倍,半最大刺激所需剂量(ED50)可... 详细信息

利用3H-胸腺嘧啶核苷参入方法,在24孔板和96孔板培养的小鼠乳腺癌细胞GR2H6中,建立了胰岛素促细胞生长活性的测定体系。无血清培养条件下,胰岛素可以刺激GR2H6细胞的DNA合成,其最大刺激比对照组提高了3～5倍,半最大刺激所需剂量(ED50)可达100～200 ng/ml左右。这一方法具有操作简便、周期较短和便于进行大量样品分析和测试等优点,它为研究胰岛素促生长功能与结构的关系提供了适当的新研究体系。

关键词：胰岛素促生长活性生物测活系统 ~3H-胸腺嘧啶核苷

Pathological changes and clinical manifesta-tions of 1020 children with liver diseases con-firmed by biopsy

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hepatobiliary & Pancreatic Diseases International 2004年第3期3卷 395-398页

作者： Hong-Fei Zhang, Xiao-Jin Yang, Shi-Shu Zhu, jing-min Zhao, Tai-he Zhang,Zhi-Qiang Xu, Da-Wei Chen, Song-Shan Wang and Ju-Mei Chen Department of Pediatric Liver Diseases, 302 Hospitalof PLA,Beijing 100039, China Department of Pediatric Liver Diseases 302 Hospital of PLABeijing 100039 China. bjzhhf@***

BACKGROUND: Liver biopsy plays an important role inaccurate diagnosis of various liver diseases in children andliver damages caused by systemic illnesses. This study wasdesigned to evaluate the value of liver biopsy in diagnosis ofliver diseases in children and explore the relationship be-tween their pathological changes and clinical ***: One-second liver biopsy was performed in1023 pediatric patients with liver diseases at our departmentfrom 1983 to 2000. Diagnosis of viral hepatitis was based onthe diagnostic criteria formulated by the Chinese Society ofInfectious and Parasitic Diseases in 1995. Inflammatorychanges of the liver were graded from 0 to 4 (G0-4 ).RESULTS: Liver biopsy was performed successfully in 1020patients including 135 infants and young children, of whom90% were hospitalized patients with chronic liver *** virus was the leading cause for chronic liver disea-ses, among which hepatitis B was detected in 75.4% of thepatients. Sixty-nine patients showed liver impairment in-duced by disorders relevant to that metabolism, Wilson' sdisease, and glycogen storage disease. Liver inflammatory in-jury (he patients with hepatitisB in contrast to 61.2% of adult patients. It was aggravatedwith age in the patients with hepatitis B and C and peakedat their schooling age. Moderate or severe liver injurieswere not seen in infants with chronic hepatitis B. Two in-fants had chronic hepatitis C. Patients with non-viral hepa-titis showed specific, non-specific histological changes andliver ***: Liver inflammatory injuries are more com-mon in children with hepatitis B than in adult patients, andsevere inflammatory changes are seen in children with hepa-titis B and C at their school age. Liver injuries induced bynon-viral factors seem to be increasing, and liver biopsy inchildren is safe and feasible in the diagnosis of liver disea-ses.

关键词： children viral hepatitis biopsy pathology

热轧对304不锈钢/Q235碳钢复合板界面组织的影响

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材料热处理学报 2022年第12期43卷 100-106页

作者：黄郦张明亚李景辉徐高山敬和民安徽工业大学材料科学与工程学院安徽马鞍山243002 安徽工业大学冶金工程学院安徽马鞍山243002

采用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射(XRD)和电子背散射衍射(EBSD)技术等研究了热轧对304不锈钢/Q235碳钢复合板界面微观组织演变的影响。结果表明:304层与Q235层之间形成了良好的冶金结合;复合板的界面两侧组织由304层的奥... 详细信息

采用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射(XRD)和电子背散射衍射(EBSD)技术等研究了热轧对304不锈钢/Q235碳钢复合板界面微观组织演变的影响。结果表明:304层与Q235层之间形成了良好的冶金结合;复合板的界面两侧组织由304层的奥氏体、Q235层的铁素体+珠光体组成;碳钢基体中存在脱碳层,其厚度大约为140μm,组织为铁素体;复合板界面存在Fe、Cr、Ni、Mn等元素的扩散区,且各元素含量有明显的梯度分布;相较于退火态复合板,热轧复合板的晶粒明显细化;在二次热轧过程中,304层和Q235层中均发生了一定程度的动态再结晶。

关键词：热轧界面元素扩散晶粒细化再结晶

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混合编码免疫算法在非线性系统辨识中的应用

系统仿真学报 2009年第12期21卷 3561-3564页

作者：龚固丰章兢何敏王炼红湖南大学电气与信息工程学院长沙410082

基于免疫算法优越的全局搜索性能与GP算法简洁的结构树编码方法,提出了一种混合编码免疫辨识算法,通过对模型结构与参数分别编码及免疫操作,同时实现了非线性模型的结构与参数辨识,实现了全局寻优,辨识的模型结构简单、易于理解。仿真... 详细信息

基于免疫算法优越的全局搜索性能与GP算法简洁的结构树编码方法,提出了一种混合编码免疫辨识算法,通过对模型结构与参数分别编码及免疫操作,同时实现了非线性模型的结构与参数辨识,实现了全局寻优,辨识的模型结构简单、易于理解。仿真验证了本算法的有效性及较强的非线性逼近能力。

关键词：免疫算法系统辨识非线性系统结构辨识参数估计

免加热直轧工艺钢筋在模拟混凝土孔隙液中的耐腐蚀性能

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材料热处理学报 2024年第6期45卷 111-120页

作者：夏子祥黄贞益邓爱军敬和民刘洋安徽工业大学材料科学与工程学院安徽马鞍山243002 安徽工业大学冶金工程学院安徽马鞍山243002 安徽省低碳冶金与流程控制工程研究中心安徽马鞍山243002

采用电化学测试和浸泡实验等方法,研究了免加热直轧(DROF)钢筋和传统加热炉轧制(THR)钢筋在模拟混凝土孔隙液中的耐腐蚀性能。结果表明:与THR钢筋相比,DROF钢筋的组织晶粒度细化,在不同浓度Cl-溶液中,DROF钢筋都具有更低的自腐蚀电流密... 详细信息

采用电化学测试和浸泡实验等方法,研究了免加热直轧(DROF)钢筋和传统加热炉轧制(THR)钢筋在模拟混凝土孔隙液中的耐腐蚀性能。结果表明:与THR钢筋相比,DROF钢筋的组织晶粒度细化,在不同浓度Cl-溶液中,DROF钢筋都具有更低的自腐蚀电流密度、更高的自腐蚀电位和更高的阻抗值,耐腐蚀性能更好;腐蚀质量损失实验表明,DROF钢筋基体表面腐蚀坑较小,且拥有较低的腐蚀速率和较少的点蚀坑。试样表面的腐蚀产物主要成分为Fe_(3)O_(4)、Fe_(2)O_(3)、α-FeOOH、γ-FeOOH。

关键词：电化学腐蚀耐腐蚀性腐蚀速率

Extramedullary plasmacytoma with the uvula as first affected site:A case report

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World Journal of Clinical Oncology 2025年第1期16卷 53-58页

作者： jing Yang Hui Peng Sheng-Ke Tu min Li Kui Song Department of hematology The First Affiliated Hospital of Jishou UniversityJishou 416000Hunan ProvinceChina Department of Pharmacy The First Affiliated Hospital of Jishou UniversityJishou 416000Hunan ProvinceChina

BACKGROUND Extramedullary plasmacytoma(EMP)represents one of the rarer forms of plasma cell malignancies,capable of impacting a variety of tissues and organs throughout the *** majority of EMP cases are predominantly found in the head and neck region,especially within the laryngopharynx,as well as in the gastrointestinal *** there have been documented instances of oropharyngeal involvement in EMP cases in the academic literature,it is important to note that EMP specifically affecting the uvula is exceedingly ***,it is noteworthy that over 60% of epithelial carcinomas in the upper respiratory tract and oropharynx tend to metastasize to the cervical lymph nodes,indicating a propensity for regional spread in these types of *** this context,we present a rare case of extramedullary plasmacytoma where the uvula served as the initially affected *** case emphasizes the need for heightened awareness among clinicians regarding such unusual comorbidities,as early recognition and diagnosis can significantly influence patient management and treatment *** addition,a review of the relevant literature is included to further educate and inform healthcare professionals about this rare presentation,ultimately aiming to enhance clinical understanding and improve patient care in similar *** SUMMARY A 51-year-old man was admitted to our hospital because of a slowly enlarging neck mass.A physical examination revealed a palpable left lymph node,and magnetic resonance imaging(MRI)of the oropharynx and the neck showed a soft tissue mass in the oropharynx and enlargement of multiple lymph nodes in the *** soft tissue mass was diagnosed as plasmacytoma by immunohistochemical *** immunoglobulins and bone marrow biopsy showed normal ***,we diagnosed that as EMP of the *** four cycles of adjuvant chemotherapy dominated by bortezomib,MRI reexamination showed a significant reduction of the mass

关键词： Extramedullary plasmacytoma Plasmacytoma Uvula Multiple myeloma Case report