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UPPER BOUND FOR FINITE-TIME RUIN PROBABIliTY IN A MARKOV-MODULATED MARKET

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Journal of Systems Science & Complexity 2011年第2期24卷 308-316页

作者： Jinzhu li rong WU School of Mathematical Sciences and LPMC Nankai University Tianjin 300071 China.

This paper studies the upper bound for finite-time ruin probability of an insurance company which invests its wealth in a stock and a bond. The authors assume that the interest rate of the bond and the volatility of the stock are modulated by a continuous-time stationary Markov chain with finite state. By a pure probabilistic method, the upper bound for the finite-time ruin probability is obtained.

关键词： Finite-time ruin probability jump-diffusion model Markov-modulated process.

Complementary and alternative medicine in ADHD treatment:more soundly designed clinical trials needed

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World Journal of Pediatrics 2019年第5期15卷 516-519页

作者： rong-Wang Yang rong li Department of Child Psychology Children's HospitalZhejiang University School of Medicine3333 Binsheng RoadHangzhou 310052China

We read with great interest the article[1]by Dehbokri et *** in the Journal *** authors carried out a double-blind,randomized clinical trials to study the effects of vitamin D supplementation on children with attentio... 详细信息

关键词： clinical vitamin al.

Nitridation of chromium powder in ammonia atmosphere

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International Journal of Minerals,Metallurgy and Materials 2015年第3期22卷 319-324页

作者： ling li Qiang Zhen rong li Nano-Science and Technology Research Center Shanghai University School of Materials Science and Engineering Shanghai University

CrN powder was synthesized by nitriding Cr metal in ammonia gas flow, and its chemical reaction mechanism and nitridation process were studied. Through thermodynamic calculations, the Cr-N-O predominance diagrams were constructed for different tempera- tures. Chromium nitride formed at 700-1200℃ under relatively higher nitrogen and lower oxygen partial pressures. Phases in the products were then investigated using X-ray diffraction （XRD）, and the Cr2N content varied with reaction temperature and holding time. The results indicate that the Cr metal powder nitridation process can be explained by a diffusion model. Further, Cr2N formed as an intermediate product because of an incomplete reaction, which was observed by high-resolution transmission electron microscopy （HRTEM）. After nitriding at 1000℃ for 20 h, CrN powder with an average grain size of 63 nm was obtained, and the obtained sample was analyzed by using a scanning electron microscope （SEM）.

关键词： chromium powder nitridation chromium nitride ammonia chemical synthesis reaction mechanism

Combining Neutron Scattering,Deuteration Technique,and Molecular Dynamics Simulations to Study Dynamics of Protein and Its Surface Water Molecules

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Chinese Journal of Polymer Science 2019年第11期37卷 1083-1091页

作者： li-rong Zheng liang Hong School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China Institute of Natural Sciences Shanghai Jiao Tong University Shanghai 200240 China

Protein internal dynamics is essential for its function. Exploring the internal dynamics of protein molecules as well as its connection to protein structure and function is a central topic in biophysics. However, the atomic motions in protein molecules exhibit a great degree of complexities. These complexities arise from the complex chemical composition and superposition of different types of atomic motions on the similar time scales, and render it challenging to explicitly understand the microscopic mechanism governing protein motions, functions, and their connections. Here, we demonstrate that, by using neutron scattering, molecular dynamics simulation, and deuteration technique, one can address this challenge to a large extent.

关键词： Neutron scattering Deuteration techniques Molecular dynamics simulations Protein Hydration water Dynamics

On s-Quasinormal and c-Normal Subgroups of a Finite Group

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Acta Mathematica Sinica,English Series 2008年第4期24卷 647-654页

作者： Shi rong li Department of Mathematics Guangxi University Nanning Guangxi 530004 P. R. China

Let F be a saturated formation containing the class of supersolvable groups and let G be a finite group. The following theorems are shown：（1） G ∈ F if and only if there is a normal subgroup H such that G/H ∈ F and every maximal subgroup of all Sylow subgroups of H is either c-normal or s-quasinormally embedded in G; （2） G ∈F if and only if there is a soluble normal subgroup H such that G/H∈F and every maximal subgroup of all Sylow subgroups of F（H）, the Fitting subgroup of H, is either e-normally or s-quasinormally embedded in G.

关键词： s-quasinormally embedded subgroup c-normal subgroup p-nilpotent group saturated formation

高等学历继续教育治理的时代特征、现实困境及实践路径

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成人教育 2025年第1期45卷 1-9页

作者：刘志红刘轶李荣华赣南师范大学继续教育学院江西赣州341000 上海师范大学哲学与法政学院上海200233

进入新时代,为了解决高等学历继续教育办学质量不高、治理体系不健全等问题,教育部近年来连续发布多个文件,加强了对继续教育的全方位监管和指导。目前,高等学历继续教育面临办学定位不明、人才培养质量提升困难、教学治理能力不足等困... 详细信息

进入新时代,为了解决高等学历继续教育办学质量不高、治理体系不健全等问题,教育部近年来连续发布多个文件,加强了对继续教育的全方位监管和指导。目前,高等学历继续教育面临办学定位不明、人才培养质量提升困难、教学治理能力不足等困境。因此,新时代高等学历继续教育应明确办学定位、坚持公益性、实行管办分离、控制适度规模办学,并建立规范化保障体系,实现自身的高质量发展。

关键词：高等学历继续教育现实困境教育治理

Regularity of the Density for the Total Weighted Occupation Measure of Super-Brownain Motion

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Acta Mathematica Sinica,English Series 2011年第8期27卷 1557-1572页

作者： rong li liU Department of Mathematics Nanjing University Nanjing 210093 P. R. China

Let （Xt） be a super-Brownian motion in a bounded domain D in R^d. The random measure Y^D（.） = ∫o^∞ Xt（.）dt is called the total weighted occupation time of （Xt）. We consider the regularity properties for the densities of a class of yD. When d = 1, the densities have continuous modifications. When d ≥ 2, the densities are locally unbounded on any open subset of D with positive y D （dx）-measure.

关键词： Superprocesses Poisson point processes regularity total weighted occupation time

On Two Theorems of Finite Solvable Groups

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Acta Mathematica Sinica,English Series 2005年第4期21卷 797-802页

作者： Shi rong li Department of Mathematics Guangxi University Nanning 530004 P. R. China

For a finite group G, let T（G） denote a set of primes such that a prime p belongs to T（G） if and only if p is a divisor of the index of some maximal subgroup of G. It is proved that if G satisfies any one of the following conditions：（1） G has a p-complement for each p∈T（G）; （2）│T（G）│= 2：（3） the normalizer of a Sylow p-subgroup of G has prime power index for each odd prime p∈T（G）; then G either is solvable or G/Sol（G）≌PSL（2, 7） where Sol（G） is the largest solvable normal subgroup of G.

关键词： Finite solvable group The index of a maximal subgroup Simple group

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基于双模态融合的ZigBee设备识别方法

网络安全与数据治理 2025年第2期44卷 17-25页

作者：李荣赖怡聪李乐言中国电子产品可靠性与环境试验研究所广东广州510610

智能家居为人们日常生活带来便利的同时,也带来了隐私安全风险,智能传感器能够不断收集周围环境的信息,并通过无线通信远程传输数据。为了保护用户的隐私安全,提出了一种基于双模态融合的ZigBee设备识别方法。首先,通过空中接口被动捕... 详细信息

智能家居为人们日常生活带来便利的同时,也带来了隐私安全风险,智能传感器能够不断收集周围环境的信息,并通过无线通信远程传输数据。为了保护用户的隐私安全,提出了一种基于双模态融合的ZigBee设备识别方法。首先,通过空中接口被动捕获智能家居设备ZigBee流量数据;然后,对设备流量进行分片处理,在文本模态下提取加密流量的时序、长度等特征信息,在图像模态下提取流量图像的高维特征;最后,融合加密流量的文本特征和图像特征,构建基于双模态融合的设备类型识别模型。通过对5个厂家15个设备的实验结果表明,即使设备的无线流量被加密保护,该方法在ZigBee设备识别准确率上达到99%左右,能够有效地识别用户身边的智能传感器,保护用户的隐私安全。

关键词：隐私安全 ZigBee 深度学习智能家居