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生物可降解聚(乳酸-碳酸酯)材料研究进展
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作者 杨绍哲 吴蓉 +3 位作者 张远康 李建国 白威 马攀 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2024年第10期162-170,共9页
聚乳酸和脂肪族聚碳酸酯是具有绿色、无毒、无污染等特点的生物可降解材料,但是这2种材料在热性能、力学性能等方面存在一定不足,限制了它们的进一步应用。通过将二者共聚合成聚(乳酸-碳酸酯)材料是对其进行改性的有效途径。共聚改性可... 聚乳酸和脂肪族聚碳酸酯是具有绿色、无毒、无污染等特点的生物可降解材料,但是这2种材料在热性能、力学性能等方面存在一定不足,限制了它们的进一步应用。通过将二者共聚合成聚(乳酸-碳酸酯)材料是对其进行改性的有效途径。共聚改性可显著改善材料各项性能,进一步扩展它们的应用范围。本文综述了近年来聚(乳酸-碳酸酯)材料的相关研究成果,包括CO_(2)/环氧化物/丙交酯共聚法、丙交酯/环状碳酸酯开环共聚法及扩链法等3种合成方法,以及共聚物在形状记忆聚合物、弹性体、微球和支架材料等不同方面的应用,并对未来的发展前景进行了展望。 展开更多
关键词 聚乳酸 脂肪族聚碳酸酯 共聚改性 催化 生物可降解
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Ruin Theory for the Risk Process Described by PDMPs 被引量:2
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作者 Guo-jingWang Chun-shengZhang rongwu 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 2003年第1期59-70,共12页
Abstract In this paper we consider the risk process that is described by a piecewise deterministic Markov processes (PDMP). We first present the construction of the risk process and then discuss some ruin problems for... Abstract In this paper we consider the risk process that is described by a piecewise deterministic Markov processes (PDMP). We first present the construction of the risk process and then discuss some ruin problems for this new kind of risk model. 展开更多
关键词 Keywords Risk process survivor function ruins probability integro-differential equation supremum distribution bevor ruin
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Distribution of Deficit at Ruin for a PDMP Insurance Risk Model
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作者 Guo-jingWang Su-pingQian rongwu 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 2003年第3期521-528,共8页
In this paper we consider the risk process described by a piecewise deterministic Markov processes (PDMP). We mainly discuss the distribution of the deficit at ruin for the risk process. We derive the integrodi differ... In this paper we consider the risk process described by a piecewise deterministic Markov processes (PDMP). We mainly discuss the distribution of the deficit at ruin for the risk process. We derive the integrodi differential equation satisfied by this distribution. We obtain the explicit expressions for it for certain choices of the claim amount distribution. 展开更多
关键词 Integro-differential equation risk process deficit at ruin survivor function
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