基于创新型政府视角下的上海市中心城区公共体育场地运行机制——以上海市黄浦区为例

采用文献资料法、问卷调查法、访谈法等方法,研究上海市中心城区公共体育场地运行机制。通过分析上海市黄浦区体育场地供给现状以及公共体育场地服务需求的整体情况,发现场地运行机制中存在的问题与不足,进而为公共体育场地运行机制的未来发展与改善路径提出建议。     

Preparation of carbon encapsulated iron nanoparticles with very thin shells by DC arc discharge

Carbon encapsulated iron nanoparticles(CEINPs) with very thin shells and good core-shell structures were prepared by DC arc discharge at argon intake temperature(AIT) of 800 ℃. The results of high resolution transmission electron microscope(HRTEM), energy dispersive X-ray(EDX) spectroscope, X-ray diffraction(XRD), and X-ray photoelectron spectroscope(XPS) characterizations on the product B show that the thickness of the carbon shells of CEINPs in the product B is in the range of ca. 0.5—5.3 nm, i. e., which can be as thin as only two layers of graphite. The average diameter of the CEINPs is about 24. 7 nm. The total content of Fe element in the product B is 77.0 wt%. The saturation magnetization(Ms) and coercivity(Hc) of the product B are 107.4 emu/g and 143 Oe, respectively. The formation of the CEINPs in the product B is discussed briefly.     

关于孪生素数猜想证明的探讨

孪生素数猜想 ,即孪生素数是否无穷多 [1] ,是数论三大问题之一 .“所谓数论三大问题就是费尔马问题、孪生素数问题和哥德巴赫猜想 [1]” .我们在前人研究的基础上 ,先找出了勾股数组的排列顺序表[2 ] ,从中发现了大于 2的素数表达式 [3]和孪生素数的表达式 [4 ] ,在 [2 ]、[3]、[4 ]研究的基础上本文对孪生素数猜想证明做了进一步的探讨     

美、苏两国有关欧洲集体安全问题的交锋（1954-1957）

1954年2月10日柏林四国外长会议上苏联首次正式提出有关建立欧洲集体安全体系的建议,使欧洲集体安全问题成为了当时人们关注的焦点问题之一,直至1958年美苏在柏林问题上的再次紧张而走向平息。根据有关档案研究发现,美苏两国在这一问题存在着根本性的分歧,苏联打算通过建立欧洲集体安全体系,“绕开”东西方争执已久的德国问题,保持欧洲和德国的分裂现状,巩固苏联在欧洲的势力范围和对东欧的控制,实现阻止联邦德国加入北约、削弱西方联盟、将美国排除在欧洲之外等目标;美国则主张先让德国在自由选举的基础上完成统一后再考虑欧洲集体安全问题,而且统一后的德国必须加入北约,反对因建立所谓欧洲集体安全而削弱西方阵营的实力。双方的分歧使美苏双方在柏林四国外长会议以及随后的会议上在建立欧洲集体安全的议题上都无法达成共识。究其原因在于,一是美苏两国都没有真正打算放弃以实力为基础的抗衡政策;二是双方在德国问题上的分歧导致美苏双方在欧洲集体安全问题上难以形成一致,特别是在德国问题和欧洲集体安全问题的解决顺序上观点完全不同。     

Exploring a Personal Social Knowledge Network (PSKN) to aid the observation of connectivist interaction for high- and low-performing learners in connectivist massive open online courses

This study adds a new perspective to the observations about connectivist interaction behavior in cMOOCs by extending the notion of network building from the perspective of individuals. We explore the possibility of building a learning network named Personal Social Knowledge Network (PSKN) to support in the monitoring of learning performance and interaction in cMOOCs. The sample in this study included 284 preservice teachers and their learning lasted approximately 12 weeks. Data were primarily gathered by PSKN graphs. The results revealed a correlation between connectivist interaction measured by the PSKN (including density structure) and learning performance. The results also revealed differences in connectivist interaction behavior and patterns, indicated by PSKN (densities and structures), for high- and low-performing learners in cMOOCs. The high-performing learners show deeper knowledge interaction and social communication in addition to simple knowledge sharing and social communication. Additionally, as time passed and the PSKN of high-performing learners extended further, their interaction behavior became more complex and their role had gradually changed from “learning” to “teaching” as well as from knowledge acceptance to knowledge creation in cMOOCs.     

Modeling Self-Regulation as a Process Usinga Multiple Time-Scale Multiphase Latent Basis Growth Model

Measurement burst designs, wherein individuals are measured intensively during multiple periods (i.e., bursts), have created new opportunities for studying change at multiple time scales. This article develops a model that might be useful in situations where the functional form of short-term change is unknown, might consist of multiple phases, and might change over the long term. Specifically, we combine measurement of intraindividual entropy, a latent basis growth model, a multiphase growth model, and a growth model with covariates into a unified framework that could help accommodate the complexity of patterns that emerge in multiple time-scale categorical data streams. Empirical data from a longitudinal study of young children’s behavior during laboratory tasks designed to induce frustration are used to illustrate the utility of the proposed model for simultaneously describing intratask (short-term) change in self-regulation and developmental (long-term) shifts in intratask change.     

Online homework impact in undergraduate mathematics and business statistics courses

This evaluation examines the impact on student success rates related to changes in instructional programmes in undergraduate mathematics and statistics courses. Success for students taking courses with a computer-based homework component was compared with success of students who took the course in prior semesters without the computer-based component. Graphical and analytical tools are used to compare results. Results come from multiple semesters of each type of homework application, for both pre-calculus algebra and business statistics courses. Students whose performance is utilised in this study are undergraduate students taking introductory level college mathematics or business statistics courses, with mostly no prior instruction at this level. Comparing the success of the intervention group with the success of the baseline control group, findings support that the students using the computer-based homework instruction are just as successful as those using the traditional method of homework instruction. Utilising the online homework applications, provide several important advantages in today’s universities, including the reduced time for faculty grading, consistency of graded assignments across all sections of a course and most importantly, immediate feedback for students.     

基于民族旅游视野下的腾冲傈僳族服饰文化资源的开发策略探析

服饰作为民族文化的标识,民族文化的“活的史书”,是民族文化“可视化”的缩影,是流动的“活文本”。在民族旅游发展中发挥着至关重要的作用。民族服饰在民族旅游中作为一种文化资源被消费,民族服饰由原来的文化行为参与到经济行为中来,一方面提升了民族旅游的文化消费品质,另一方面通过民族服饰展示了自己的文化,并获得经济回报。通过对民族旅游与服饰文化资源的关系研究,分析腾冲傈僳族服饰的特点和开发现状,提出民族服饰参与民族旅游的保护性开发策略。     

试论灌输理论在当代思想政治教育中的运用

马克思主义灌输理论是思想政治教教育的基础理论。只有通过灌输的途径,才能把马克思主义思想意识观念由理论形态转化为人们的思想观念,并最后转化为指导人们实践的物质力量。在思想政治教育中进行意识形态的灌输还具有强大的经济功能,是社会经济增长的内生变量。因此,创新灌输的内容、方法和手段,真正体现与时俱进的理论品质,是思想政治教育工作的一个永恒课题。     

德州市服务业现状调查与发展战略研究

德州市近年来传统服务业规模壮大,总量提高;现代服务业亦有明显进步。但存在服务业总量偏小、结构不优等问题。今后应调正宏观导向,调优政策,强化措施,力争尽快建成鲁西北与冀东南最大的集休闲娱乐美食与采购销售一体化的区域性商贸中心城市。