《愧郯录》史料价值探微

《愧郯录》是南宋学者岳珂的一部考证笔记,书中所记内容都是宋朝自建立起至宁宗时的史实,阐发先贤和朝廷所制定的典章制度。该书考证内容十分广博,涉及职官、舆服、礼仪、宗室、科举等制度,此外还保存了地理、宗教、经济、儒学、科技等方面的史料,具有很高的史料价值。此书征引的文献亦相当丰富,除前代正史、杂史和笔记外,还有宋代官修史书和官方认可的私修史书以及大量私人撰述,有些文献今已散佚,《愧郯录》所记的内容则保存了这些文献的局部面貌。     

流域与中国城市群空间分布规律研究

以中国(大陆)为例,把12个公认的城市群空间分布与10大河流流域空间分布叠加,结果表明两点:一是流域与城市群形成了较好的空间对应关系;二是城市群的中心城市一般在流域的最佳区位.     

A numerical method to simulate the coupled oscillations of flexible structures in flowing fluids

A numerical method is developed to simulate the coupled phenomena in a fluid-flexible-structure system. Specifically, a two-dimensional panel method is used to calculate the hydrodynamic forces and a modal superposition method is adopted to solve the governing equation of an Eulerian beam. The stability boundary of a single flexible beam in a uniform flow is calculated and compared with previous results to verify the validity of the code. The flow-induced flapping of a single and two flexible bodies for S=1.0, U*=7.0 are investigated. For the flow-induced vibration of a single beam, the oscillation frequency is close to the secondary natural frequency of a cantilever. For two parallel flexible beams, they oscillate in phase when the non-dimensional separating distance H<0.25. When H>0.25, the out-of-phase mode occurs with a jump in frequency. When H>1, the interaction between the two beams decouples and the frequency and forces of each beam revert to behavior associated with a single beam in the same flow. Simulations of coupled-flapping of two tandem flexible structures proved that the drag acting on the upstream body is reduced while for that downstream drag is obviously increased when the structures are closely arranged. The numerical results obtained in the present work are qualitatively consistent with early experimental results.     

Complete monotonicity of the probability of ruin and de Finetti’s dividend problem

This paper studies the complete monotonicity of the probability of ruinψin the the classical risk model and the classical risk model that is perturbed by a diffusion.As a byproduct,the authors give an alternative proof to a result on the optimal dividend problem due to LoefFen(2008).     

40-Gb/s all-optical digital 4-bit priority encoder employing cross-gain modulation in semiconductor optical amplifiers

High-speed all-optical logic circuits have attracted much attention because of their important roles in signal processing in next-generation optical networks.The digital encoder is widely used in binary calculation,multiplexing,demultiplexing,address recognition and data encryption.A priority encoder allows the existence of multiple valid inputs simultaneously,identifies the priority of the request signals and encodes the priority.We propose and experimentally demonstrate an all-optical 4-bit priority encoder for return-to-zero signals at 40 Gbit/s based on cross-gain modulation in semiconductor optical amplifiers.Detuning fil-ters after semiconductor optical amplifiers are employed to improve the output performance.Correct logic bit sequences and clear open eye patterns with extinction ratios exceeding 10 dB are achieved.     

高师《美术教学论》课程资源的开发和利用

目前,课程资源的开发和利用已成为新一轮基础课改的热门话题.通过对上海师范大学美术学院《美术教学论》一个学期的观摩教学,对高师美术课程资源的开发及利用获得了一些启示.     

生物酶法合成L-茶氨酸和聚谷氨酸的高效同步分离纯化

利用γ-谷氨酰转肽酶(γ-glutamyl transpeptidase,γ-GGT,EC 2.3.2.2)催化,以谷氨酰胺和乙胺为底物进行酶反应.反应后主要成分为L-茶氨酸和聚谷氨酸(poly γ-glutamic acid,PGA),杂质有氯离子、乙胺以及少量谷氨酰胺和谷氨酸.通过弱酸性阳离子树脂和弱碱性阴离子树脂...     

拉尔夫&#183;霍华德&#183;福勒与量子理论在英国的发展

福勒是英国剑桥的数学家,从数学物理角度对天体物理、统计物理、量子物理等物理领域作了许多工作.他与当时剑桥各个物理领域的前沿人物都有密切的交往,从而使他对不同物理领域都有涉及,尤其是在量子领域,他是早期关注量子发展的英国科学家之一.     

浅议我国的犯罪被害人

犯罪被害人是指受到犯罪人犯罪侵害遭到损害的人，具有犯罪被害性、犯罪和被害的互动性，有时还具有可罚性或可责性。犯罪被害人与犯罪人之间存在无关联和有关联两大模式。犯罪被害预防有社会被害预防、群体被害预防、个体被害预防三个层次和被害前预防、被害中预防和被害后预防三个阶段。