简析唐代咏雨诗

唐代诗人多有咏雨之作,根据主观感情、体验,赋予雨这一普通的自然现象以不同的、鲜活的艺术意蕴,具有一种可贵的审美价值。本文结合若干具体作品,对唐代咏雨诗的意象构成及其艺术表现手法,作出简要分析并进行初步探讨。     

South Korean Perspective on Learning Disabilities

In the context of the educational system and the nature of special education in South Korea, I describe policy, practice, and research about children with learning disabilities (LD). Recently, the study of LD has attracted professionals from multiple disciplines including general and special education, medicine, psychology, and social work. In Korea, the field of LD has developed rapidly over a brief period, but there are many problems to be solved in the near future. In particular, the field of LD in Korea lacks: (a) consensus about a conceptual definition, (b) a clear set of criteria for identifying students with LD, (c) lack of assessment instruments for identifying LD, and (d) general low understanding or misunderstanding of students with LD among teachers and parents.     

《玉海》卷一二一“直中书郎”考辨

《玉海》卷一二一所谓唐代中书省“直中书郎”，应为“直中书省”。“直中书省”源于东晋的“直西省”，南北朝皆有设任，主要以他官直中书省，掌诏诰。唐代的“直中书省”即中书省额外直官，与南北朝相比，其任命更具灵活性，主要职能由专掌诏命变为掌诏命或备顾问。唐太宗时最为多见，其后随着政治需求和职官设置的变化而逐渐减少，中唐之后便不再置。     

Elasto-inertial particle focusing under the viscoelastic flow of DNA solution in a square channel

Particle focusing is an essential step in a wide range of applications such as cell counting and sorting. Recently, viscoelastic particle focusing, which exploits the spatially non-uniform viscoelastic properties of a polymer solution under Poiseuille flow, has attracted much attention because the particles are focused along the channel centerline without any external force. Lateral particle migration in polymer solutions in square channels has been studied due to its practical importance in lab-on-a-chip applications. However, there are still many questions about how the rheological properties of the medium alter the equilibrium particle positions and about the flow rate ranges for particle focusing. In this study, we investigated lateral particle migration in a viscoelastic flow of DNA solution in a square microchannel. The elastic property is relevant due to the long relaxation time of a DNA molecule, even when the DNA concentration is extremely low. Further, the shear viscosity of the solution is essentially constant irrespective of shear rate. Our current results demonstrate that the particles migrate toward the channel centerline and the four corners of a square channel in the dilute DNA solution when the inertia is negligible (elasticity-dominant flow). As the flow rate increases, the multiple equilibrium particle positions are reduced to a single file along the channel centerline, due to the elasto-inertial particle focusing mechanism. The current results support that elasto-inertial particle focusing mechanism is a universal phenomenon in a viscoelastic fluid with constant shear viscosity (Boger fluid). Also, the effective flow rate ranges for three-dimensional particle focusing in the DNA solution were significantly higher and wider than those for the previous synthetic polymer solution case, which facilitates high throughput analysis of particulate systems. In addition, we demonstrated that the DNA solution can be applied to focus a wide range of particle sizes in a single channel and also align red blood cells without any significant deformation.     

网络信息研究

本文针对人们在利用网络过程中遇到的问题，对网络信息进行了研究，分析了利用因特网信息资源的主要障碍和网络信息的特点，指明了人们利用网络的误区和评估Internet资源、判断网络信息质量，以及利用网络的技巧。     

农民工信息获取及其制约因素的实证研究

受信息获取能力制约,农民工的受教育程度与其信息获取渠道的选择密切相关。使用954个农民工样本分析发现,农民工的受教育程度显著正向影响着其选择网络渠道获得信息,而收入水平和年龄变量均对农民工群体的获取信息渠道的选择产生显著影响。要实现农民工在城市融入过程中的价值观念和身份认同的转换,必须提高农民工获取信息的便利程度,对有需求的农民工给予适当的信息技术设备使用培训和指导;同时,提高农村地区的教育投入,解决农民工文化水平不高引致的其网络渠道应用能力不足的问题。     

关于在铁路应用RFID技术的几点看法

分析RFID(无线射频识别技术)的技术经济优势,指出RFID电子标签产品具有广阔的市场前景,进而提出了在铁路应用RFID技术的几点想法,并对这些想法进行深入探讨,分析其可行性,为铁路企业未来在多个方面应用RFID技术提供策略。     

体操普修课教学中融入专门性身体姿态训练的实验研究

针对高等体育师范专业体操普修课学生在体操教学中身体姿态偏差的状况,本文特制定出一套用于课堂中的体操专门性身体姿态训练手段。结果表明:试验组在经过专门性身体姿态训练后取得了明显的教学效果。     

Exploring the forward citation patterns of patents based on the evolution of technology fields

Forward citations of patents have been used extensively to capture the impact of technological knowledge. However, our understanding of the factors shaping patent citation patterns remains limited. One of the main limitations is the lack of scholarly attention paid to the dynamic influences arising from the evolution of technology fields. From an evolutionary perspective, technological impact is not simply determined by the static attributes of a technology itself; it is also dynamically affected by changes in the external conditions. Drawing on this viewpoint, this study suggests a model for understanding patent citation patterns by reflecting the evolution of the technology fields to which each patent belongs. Four such factors are explored: technology cycle time, potential of technological convergence, popularity of the technology field, and technological novelty. Based on the proposed model, we show how expected citation patterns can change as a result of different scenarios for technology field evolution. We conduct a case study of patents in the information technology and healthcare industries to show citation patterns of patents across heterogeneous industries as well as those within an industry. Contributions to the innovation literature and research investment decisions are discussed.