河南省人口-水资源-经济和谐发展时空变化分析

面对日益严峻的人、水、经济矛盾,研究区域人口-水资源-经济的和谐发展水平,分析其时空变化过程,能为区域缓解人口密集、水资源紧缺提供指导。本文根据人水和谐量化方法,确定了河南省2000-2012年18个城市的和谐发展水平,先利用变差系数对时间和空间的差异程度进行识别,再利用箱形图等分析其时间变化过程,利用全局Moran's I和局部Moran's I指数法分析其空间变化过程。结果表明,年际变差系数先上升后持续下降、趋于均衡,空间上周口市变差系数最大、郑州市变差系数最小;在时间上,河南省人口-水资源-经济的和谐发展水平整体有所提升,由“较不和谐”提高到了“较和谐”状态;在空间上,和谐发展水平存在显著空间正相关,三门峡、洛阳、济源为高高聚集区,商丘和濮阳为低低聚集区,整体呈现西优东劣态势。     

An intensification approach to double-block algebra: A pilot implementation of Intensified Algebra in a large urban school district

Double-block instruction has become a popular strategy for supporting struggling mathematics students in algebra I. Despite its widespread adoption, little consistent evidence supports the attributes of a successful double-block design or the effectiveness of this instructional strategy. In this study, the authors examine a pilot implementation of a double-block strategy—instantiated in the program Intensified Algebra—that combines core algebra content with insights from research on how students learn mathematics and explicit noncognitive supports focused on key attitudes, beliefs, and behaviors essential to student success. The results of the study show that, when implemented with fidelity, participation in the program significantly increased student achievement on the state end-of-course algebra I assessment.     

The social structure of entrepreneurship as a scientific field

Entrepreneurship as a scientific field has grown significantly, irrespective of the measures used. In this article we raise the question: How can we understand the evolution and success of entrepreneurship as a scholarly field? In particular, we focus on the social structure of entrepreneurship scholars to explain (1) how they are becoming integrated into larger scholarly communities and (2) how they differ from the way scholars integrate within the field of innovation studies. Based on a unique database and responses from 870 entrepreneurship scholars, we demonstrate that entrepreneurship can be regarded as a phenomenon-driven field bound together by a shared communication system and social interaction rather than strong theoretical influences, i.e., a social scholarly community. We identify two broader social communities; one embedded in entrepreneurship conferences that includes a rather eclectic group of entrepreneurship scholars, and another related to entrepreneurship journals and entrepreneurship economics, characterized by a stronger domain orientation. In contrast, scholars in innovation studies tend to be more theory-driven and are bound together by their disciplinary and theoretical background, i.e., an intellectual scholarly community.     

The climate for entrepreneurship at higher education institutions

While the importance of a supportive context for entrepreneurship is widely acknowledged, its antecedents are rarely investigated. We apply the concept of organizational climate to higher education institutions and examine the drivers of students’ perceptions of the entrepreneurial climate in their university. Combining data from two unique datasets and using multilevel techniques, we analyze the relationship between university characteristics and such climate perceptions of 8009 students at public universities in Germany. We find university entrepreneurship measures to have a positive effect on students’ climate perceptions, which also depend on students’ background and gender. In addition, we find evidence for different peer effects, depending on students’ affinity for entrepreneurship. For the general student population, including entrepreneurship content in their normal studies seems to be required to initiate a social process of sensemaking. However, students’ perception of the entrepreneurial climate only depend to a certain degree on intentional entrepreneurship measures. In our study, general university characteristics have the strongest influence on climate perceptions. Overall, our study adds to our understanding of which parameters are important for establishing a more favorable and inspiring climate for becoming an entrepreneur at higher education institutions.     

“吾丧我”：《齐物论》理路之再解读

文章着重分析了《齐物论》文中所提出的＂吾丧我＂这一概念的内涵及其在全文中的作用,力求从＂吾丧我＂的角度来解析《齐物论》一文的内在理路。认为,＂吾丧我＂概念中虽然包含了形、心两个方面,但《齐物论》一文主要侧重阐述的是＂丧心＂的一面。     

Cyclic electron flow around photosystem I is required for adaptation to high temperature in a subtropical forest tree, Ficus concinna

Dissipation mechanisms of excess photon energy under high-temperature stress were studied in a subtropical forest tree seedling, Ficus concinna. Net CO2 assimilation rate decreased to 16% of the control after 20 of high-temperature stress, and thus the absorption of photon energy exceeded the energy required for CO2 assimilation. The efficiency of excitation energy capture by open photosystem Ⅱ (PSII) reaction centres (Fv'/Fm') at moderate irradiauce, photochemical quenching (qp), and the quantum yield of PSII electron transport (φPSII) were significantly lower after high-temperature stress. Nevertheless, non-photochemical quenching (qHP) and energy-dependent quenching (qE) were significantly higher under such conditions. The post-irradiation transient of chlorophyll (Chl) fluorescence significantly increased after the turnoff of the actinic light (AL), and this increase was considerably higher in the 39 ℃-grown seedlings than in the 30 ℃-grown ones. The increased post-irradiation fluorescence points to enhanced cyclic electron transport around PSI under high growth temperature conditions, thus helping to dissipate excess photon energy non-radiatively.     

《庄子》音乐美学思想在“道”上的发展创新

《庄子》以"道"为本,继承发展了《老子》的音乐美学思想。在美乐标准上,《庄子》把《老子》的"音声相和"发展为"与道相和";在音乐批判上,《庄子》把《老子》批判"五音"发展为批判"违道"之乐;在音乐美学境界上,《庄子》把《老子》的"大音希声"的"悟道"境界发展为"载道"境界;在音乐审美上,《庄子》把《老子》的"过客止"的外在审美发展为"所乐"的内在审美。《庄子》在《老子》音乐美学思想的基础上,有令人瞩目的开拓创新,揭示了"道家"音乐的本源:生于心,源于物,随于道;揭示了"道家"音乐的基本功能是"和";揭示了"载道"之乐的"人为"、"有声"特点;揭示了"道家"音乐审美的心理历程。     

浅谈数学教学的“生活味儿”

让数学走进生活是新课标的要求。让课堂生活化,引导学生在生活情境中感受数学,体验数学源于生活的真正含义,对提高数学教学效果具有事半功倍的作用。但同时切忌把数学生活化片面理解,而从一个极端走向另一个极端。     

柔嫩艾美耳球虫(广东株)子孢子折光体抗原p28基因的分析

将克隆的柔嫩艾美耳球虫广东株p28基因与柔嫩艾美耳球虫MerckstrainLS18株的折光体抗原p28基因和USDA－APIno．24株折光体抗原GX3262基因进行了序列比较．发现广东株和MerckstrainLS18株的折光体抗原核苷酸序列和氨基酸序列的同源性分别为99．9％和100％，且基因内富含AGC重复顺序；而GX3262的基因序列为P28基因C-端的组成部分，并无特别的疏水和亲水区．     

浅析彩电芯片的工作条件与故障检测

近几年,随着电子技术的发展,很多新型彩色电视机都采用了I2C总线技术和新的电路,给电视机维修带来新的问题。本文通过一些维修实例和对一些新知识的理解,进一步浅析彩电微处理器(CPU)正常工作的条件。