陕西省渭河流域耗水研究

为强化水资源的严格管理和流域水资源的持续利用,根据实测资料对陕西省渭河流域的水量平衡进行了分析,研究了流域耗水类型、耗水组成及其特点。结果表明,流域各用水部门的耗水水源基本上以地下水为主,其中农村生活比例最大,为75.47%,工业和城镇生活占50%左右;人类利用水资源活动影响了水资源的径流量和水质质量。     

北洛河刘家河水文站暴雨洪水特性及洪水遭遇分析

刘家河水文站上游是北洛河暴雨的多发地区,刘家河水文站的洪水主要来自吴旗、志丹水文站断面以上占85%,洪水从上游向下游演进时,递增的洪水占到77.5%;吴旗、志丹两个水文站同时涨水的机率较大为80.0%,但两站洪峰遭遇的可能性基本没有,一站洪峰与另一站洪水过程的峰前或峰后叠加的机率为47.5%;刘家河水文站洪水有三种组合方式,干流来水型洪水占35.0%,支流来水型洪水占17.5%,叠加型洪水占47.5%;叠加型来水和干流来水型洪水在刘家河水文站形成大洪水的机率较大。     

有色Petri网在web服务组合建模中的应用

以分布、异构、多自治域的互联网环境为背景,提出利用有色Petri网对web服务组合进行建模的方法,给出了web服务组合网的形式化描述和常用结构的图形化表示方法。文中所引用的案例模型可以在CPN—tools中测试．有效的建模是模型分析验证和模型应用的基础。对电子商务和企业应用集成在解决web服务组合问题中具有一定的参考价值。     

＂气＂：方东树诗歌批评最重要的审美范畴

“气”是方东树诗歌批评最重要的审美范畴。方东树认为诗歌必须有“气”,有气才有生命,才能活;在诗歌章法上,方东树提出“气脉”之说,要求诗歌“气体高浑”,血脉灌输,又要曲折变化,往复顿挫;在诗歌风格上,方东树强调了“气势”,尚刚健之风,反对“气骨轻浮”。     

Team diversity as dissimilarity and variety in organizational innovation

How team composition exactly influences innovation outcomes remains a complex and unsolved puzzle in the literature on creativity and innovation. Our study differentiates two types of team technology-related diversity—technological dissimilarity and technological variety, and investigates their influences on the impact of an invention created by a team. Analyses of over half million U.S. utility patents in the 1991–2005 period invented by teams reveal that technological variety of team inventors has a positive effect on invention impact, and that technological dissimilarity between team inventors plays both positive and negative roles, eliciting an inverted U-shaped effect. In addition, we find that the positive effect of dissimilarity is significantly reduced after controlling for variety. Theoretical and practical implications of our findings are discussed.     

Technological Study of the Decoration on an Erard Harp from 1818

ABSTRACT

Historical pedal harps from the early nineteenth century are highly adorned objects, decorated with various techniques such as polychromy, gilding, decoupage, and gilt composition ornaments. Even though a large number of such instruments are kept in private and public collections, until now their decorative features have not been examined systematically. Moreover, little has been written about the motives behind the choice of various decorative techniques by harp makers. This article presents results from the investigation of a double-action harp made in 1818 by Erard, the leading manufacturer of harps in Regency London, focusing on the technological aspects of its decorative features. Various analytical methods, such as visual examination, microscopy, SEM-EDX, FTIR, and Py-GC-MS, were used to identify the inorganic and organic components in the coating of the harp and to analyse its stratigraphy. Inspection with ultraviolet light revealed details of the original layers and of later additions, while radiography made the internal structure as well as damaged areas and repairs visible. The outcome of this object-based examination was complemented by archival research on the Erard firm, providing new insight into Erard’s production and marketing strategies.     

高考话题作文反思与应对

反思高考话题作文,应该看到,开放、自由应是这种作文命题形式创设的初衷,而作为选拔性考试,在追求选拔功能时,怎样关注考生的利益,让他们在考场上自由地吐露自己的心声,更应成为话题作文命制者努力的方向。与此同时,面对着话题作文的冲击,中学语文教师应该学会应对,即培养出具有独立人格、自主意识的学生,以便他们能够写出有思想深度的话题作文。     

民间药用植物竹节参研究进展

竹节参（Panaxja ponicus）为五加科人参属多年生草本植物,是一种名贵的民间中草药。笔者查证了我国近30年的研究资料,就竹节参的形态、分布、名称考证、民间应用、化学成分、生物活性、栽培及管理等进行综述,为其药用资源的开发和可持续利用提供参考;同时对产业化发展急需解决的问题做深入阐述。     

民间药用植物竹节参研究进展

竹节参(Panaxja ponicus)为五加科人参属多年生草本植物,是一种名贵的民间中草药。笔者查证了我国近30年的研究资料,就竹节参的形态、分布、名称考证、民间应用、化学成分、生物活性、栽培及管理等进行综述,为其药用资源的开发和可持续利用提供参考;同时对产业化发展急需解决的问题做深入阐述。     

学情视角下的作文教学反思

作文是学生书面语言文字运用能力的综合体现,是语文教学的重点和难点。但目前,作文教学存在教学模式落后、与实际生活脱节以及学生创作积极性不高、不注重修改等问题。文章分析作文教学存在的问题,探究提升作文教学效率的策略,以提高学生的书面语言文字运用能力,促进学生全面发展。