论师范教育在维护新疆社会稳定中的优势

教育战线的反分裂斗争关系到学校的办学方向,关系到＂培养什么人、如何培养人、谁来培养人＂的根本问题。师范院校作为教育事业的＂工作母机＂,在维护新疆政治、经济、社会秩序、社会心理稳定等方面具有重要的作用和显著优势。     

具有庇护所效应的R型捕食——食饵系统研究

本文主要研究了具有庇护所效应的R型捕食——食饵系统的稳定性.结果表明庇护所效应能够增加两种群的平衡密度,并且最重要的是能够增加系统的稳定性,使得捕食者和食饵能够长期的共存.     

清江隔河岩库区杨家槽滑坡成因机制及稳定性分析

杨家槽滑坡位于清江左岸,距隔河岩水库坝址23km.根据野外调查和工程勘察资料,该滑坡形成于2.2～2.4万年前,由上、下两次级滑坡体组成.上滑体为基岩切层滑坡,下滑体为松散坡积物式滑坡,上、下滑坡体地质特征清晰,主滑带分带性明显.在上、下两滑体之间即上滑体的前缘存在一未滑动体,对上滑体起挡土墙作用.且下滑体下部发育一个规模较大的地下岩溶洞穴,洞穴沉积物齐全、完整,常年流水,成为滑坡体天然的地下水排泄通道,有利于下滑体的长期稳定.对该滑坡进行稳定性分析结果表明,在目前正常蓄水条件下,该滑坡基本处于稳定状态.     

高层钢筋砼结构整体稳定与倾覆的结构计算

根据《高层建筑砼结构技术规程JGJ3-2002》,对在水平风荷载或水平地震荷载作用下,影响高层结构稳定的因素主要是结构的刚重比,刚重比的最低要求就是结构的稳定性要求。当结构的刚重比小于最低要求时,结构的重力P—V效应会急剧增加,可能会导致结构整体失稳。本文通过结构的临界荷载结构在考虑P—V效应及不考虑P—V效应作用下,结构的侧移和层间位移的计算,确定如何控制结构的刚重比,使P—V效应增幅小于某一临界值,以确保结构的稳定。     

糯玉米杂交种-凤糯2146产量稳定性分析

采用排序法和回归系数法对10个玉米杂交种7个试点2年结果进行产量稳定性分析.结果表明:不同杂交种的产量稳定性有一定的差异,凤糯2146的产量稳定性较好,并且比对照平均增产16.2%.     

大负荷专项训练对帆船运动员前庭器官稳定性的研究

前庭感受器的稳定性直接反映帆船运动员的控制能力。本文采用文献综述和测试法,对帆船运动员大负荷专项训练前、后两个阶段进行了前庭器官机能稳定性的测定。研究发现运动员在大负荷专项训练后,前庭器官机能的稳定性不仅没有受到破坏,反而有不同程度的提高,说明帆船运动员训练水平的巩固和提高必须要有大负荷训练量的配合。     

四川汉源县城新址煤窑采空区勘查与稳定性评价

近些年,煤矿开采逐渐对个体业主开放。由于个体企业管理的无序,致使采煤巷道的分布缺少必要的记录,采煤巷道可能诱发的地面塌陷、地裂缝等地质灾害给煤矿采空区的基础设施建设及人民的生命财产带来了潜在的威胁。因而,这次勘查工作,确立了高密度电法作为寻找采煤巷道的地球物理方法。本文利用在采空区高密度电法实测资料,依据其视电阻率分布特征,圈定了该区煤矿巷道位置、分布范围。在此基础上,结合地面调查资料、钻孔验证和岩土力学参数特性,对该采空区的稳定性作出了评价,并针对采空区的防治、土地的利用情况及工程建设给出了一些意见。     

谈计算机实验室系统稳定性的研究

文章分别从硬件和软件方面分析了影响计算机系统稳定性的因素,特别是从硬盘的使用角度上对硬盘空间大小的分区比例,操作系统安装盘符的选择及硬盘软硬件维护等方面进行了说明,有效地防御了主分区数据的丢失,确保了系统的稳定性。     

The development of executive functioning across the transition to first grade and its predictive value for academic achievement

Executive functions (EFs), used to guide goal-directed behavior, are essential for adequate classroom functioning. The current study aims to, (1) examine development and stability of three core EFs (working memory, inhibition, cognitive flexibility) across the transition to first grade; and (2) investigate the relationship of EFs with academic achievement, taking into account their multidimensionality and interconnections. EF tasks were administered at the end of kindergarten and first grade (n = 89) and standardized achievement tests at the end of first grade. Results indicate moderate to large growth and stability in working memory and cognitive flexibility and small improvements and stability in inhibition. Working memory predicted academic achievement, cognitive flexibility had a limited role and no additional contribution of inhibition was found. The current study suggests that the transitional period to first grade can be an important period to promote EF development, which in turn can support the prevention of later school problems.     

Continuity for children after guardianship versus adoption with kin: Approximating the right counterfactual

Over the past two decades there has been a rapid increase in the number of children and youth living in guardianship and adoptive homes who were previously in foster care. Further, previous studies compared outcomes for children in guardianship homes to those for children in adoptive homes, despite the fact that many factors likely affect the selection of foster youth into different types of permanent placements. This study examined two counterfactuals for guardianship as a permanent placement type: adoption only and adoption or long-term-fostercare (A + LTFC). Longitudinal outcomes were tracked for children who exited foster care with relatives through guardianship (N = 4,884) or adoption (N = 12,163), as well as children in long-term foster care with relatives (N = 4,840). Propensity scores were used to match children on key indicators. In the matched sample of guardianship versus adoption cases only, children who exited to guardianship were more likely to experience discontinuity than children who exited through adoption, 11% vs. 6% respectively. However, when guardianship was compared to the combination of adoption or long-term foster care, children in guardianship experienced the same proportion of discontinuity, 11% vs. 11% respectively. These results suggest that simply matching guardianship to adoption without taking into account LTFC may be the wrong way to estimate the “what if” counterfactual if children were not discharged to guardianship. Findings also support the use of guardianship as a potential solution for children in LTFC whose caregivers are not planning to adopt.