论律诗对偶的美学功能

律诗是我国古典诗歌最重要的形式之一，而对偶作为律诗必须遵守的一条重要规则，对律诗的审美功能及情感表现等具有重要的影响。对偶具有对称对比之美及智性快乐两种美学功能，但以诗而言，它们毕竟还只是较低层次的美感。从深层情感表现角度来看，对偶以它高度对称的两句为一个结构单位、综合表达一个共同的意识的特性能使情感表现稳定有力和适度强化。除此之外，对偶的美学功能还表现在它对律诗的境界创造方面：诗的性质本身，总是竭力能在总的时间运动的框架中，融进 多的空间艺术的因素，这在律诗中表现尤为突出。律诗这种十分凝并短小而又极谨严的格徒本，如此狭窄的区间和容量，对于诗的时间运动业说无论如何是十分局促的，作为一种补充，律诗在诗的空间发展现方面超过了我们所知的任何一种诗体；而对偶艺术是律诗突破线性运动，向空间性艺术转换、创造诗的艺术境界的一种重要方式。     

智能计算研究进展与发展趋势

智能计算技术是一门涉及物理学、数学、生理学、心理学、神经科学、计算机科学和智能技术等的交叉学科,近年来发展迅猛。本文简要介绍了智能计算的学科背景、原理和特点,评述了国际的发展现状和趋势。     

Evaluating a Professional Development Framework to Empower Chemistry Teachers to Design Context-Based Education

Even experienced chemistry teachers require professional development when they are encouraged to become actively engaged in the design of new context-based education. This study briefly describes the development of a framework consisting of goals, learning phases, strategies and instructional functions, and how the framework was translated into a professional development programme intended to empower teachers to design context-based chemistry education. The programme consists of teaching a pre-developed context-based unit, followed by teachers designing an outline of a new context-based unit. The study investigates the process of teacher empowerment during the implementation of the programme. Data were obtained from meetings, classroom discussions and observations. The findings indicated that teachers became empowered to design new context-based units provided they had sufficient time and resources. The contribution of the framework to teacher empowerment is discussed.     

Students’ Ability to Connect Function Properties to Different Types of Elementary Functions: An Empirical Study on the Role of External Representations

Recent research on the phenomenon of improper proportional reasoning focused on students’ understanding of elementary functions and their external representations. So far, the role of basic function properties in students’ concept images of functions remained unclear. We add to this research line by investigating how accurate students are in connecting functions to their corresponding properties and how this accuracy depends on function types and representations. A large group of 10th graders evaluated for different function types, represented in either a graphical, a formulaic, or a tabular mode, the correctness of statements about their general properties and behavior. Results show that students succeeded rather well in making the right connections between properties and functions. Errors depended not only on the type of function for which the properties were evaluated but also on the kind of representation in which the function was presented. These results highlight the importance of function properties in students’ concept images of functions and suggest positive effects of making these properties explicit to students.     

A "dry and wet hybrid" lithography technique for multilevel replication templates: Applications to microfluidic neuron culture and two-phase global mixing

A broad range of microfluidic applications, ranging from cell culture to protein crystallization, requires multilevel devices with different heights and feature sizes (from micrometers to millimeters). While state-of-the-art direct-writing techniques have been developed for creating complex three-dimensional shapes, replication molding from a multilevel template is still the preferred method for fast prototyping of microfluidic devices in the laboratory. Here, we report on a "dry and wet hybrid" technique to fabricate multilevel replication molds by combining SU-8 lithography with a dry film resist (Ordyl). We show that the two lithography protocols are chemically compatible with each other. Finally, we demonstrate the hybrid technique in two different microfluidic applications: (1) a neuron culture device with compartmentalization of different elements of a neuron and (2) a two-phase (gas-liquid) global micromixer for fast mixing of a small amount of a viscous liquid into a larger volume of a less viscous liquid.     

《孙子十家注》源流轨迹

《宋史·艺文志》著录吉天保《十家孙子会注》为《孙子十家注》的原始著录,其源则为各家注本的出现,其中依次包括曹操、孟氏、李筌、贾林、杜佑、杜牧、陈皋、何延锡、王晳、梅尧臣、张预十一家注。吉氏成书后重要的刊本则有:明正统《道藏》刊《孙子注解》;明谈恺、李棣、黄邦彦等刊《孙子集注》;清孙星衍刊《孙子十家注》;及1961年中华书局上海编辑所影刊的《宋本十一家注孙子》。     

航天型号费用估算随机不确定性的优化综合

本文论术字复杂的技术和外界环境条件下,三遇用估算方法涉及到的随机不确定性及其表征参数－标准差,通过采用最小线性方差组合,实现了三种费用估算方法随机不确定性的优化综合,对方法之间存在非零协方差的情况。本文也给出了相应的求解方法。     

Dielectrophoresis based discrimination of human embryonic stem cells from differentiating derivatives

Assessment of the dielectrophoresis (DEP) cross-over frequency (f_xo), cell diameter, and derivative membrane capacitance (C_m) values for a group of undifferentiated human embryonic stem cell (hESC) lines (H1, H9, RCM1, RH1), and for a transgenic subclone of H1 (T8) revealed that hESC lines could not be discriminated on their mean f_xo and C_m values, the latter of which ranged from 14 to 20 mF/m². Differentiation of H1 and H9 to a mesenchymal stem cell-like phenotype resulted in similar significant increases in mean C_m values to 41–49 mF/m² in both lines (p < 0.0001). BMP4-induced differentiation of RCM1 to a trophoblast cell-like phenotype also resulted in a distinct and significant increase in mean C_m value to 28 mF/m² (p < 0.0001). The progressive transition to a higher membrane capacitance was also evident after each passage of cell culture as H9 cells transitioned to a mesenchymal stem cell-like state induced by growth on a substrate of hyaluronan. These findings confirm the existence of distinctive parameters between undifferentiated and differentiating cells on which future application of dielectrophoresis in the context of hESC manufacturing can be based.     

河南神话的基本特征及学术价值

河南神话的基本特征主要表现为：多化因子的融合；多神话与传说的并存；原生神话超强的生命力与再生力；地域性与超地域性；神话与传说的相互生成；神话演变过程中的非逻辑性与超时代性。研究河南神话的意义在于：神话对古史的反证作用；弥补中国神话之缺；通过神话异发掘新的神话；窥视中国古典神话流变的过程。     

以医学科研人员为中心实施感动服务的探讨

医疗机构的改革必然对医院科研管理人员提出更高的要求,本文提出以医学科研人员为中心、以感动服务为基点的全新服务意识和服务方式。医院科研管理人员必须树立“甘为他人作嫁衣”的无私奉献精神,转变服务观念,提供感动服务,并通过不断学习,提高自身素质,在服务中不断创新,更好地为医院科研服务。