中共历史上两次飞跃之共同点论析

中共历史上的两次飞跃 ,在缘起、性质、过程特征及历史意义等方面有互通之处。这些共同点昭示人们 ,中国的现代化建设既要立足于客观实际与具体国情 ,解放思想、实事求是 ,坚决反对“左”、右两种倾向 ,又要着眼于解放与发展生产力 ,同时还要有一个成熟的党的中央领导集体与领导核心     

Theoretical and Experimental Study on Ground Coupled Heat Pump with Vertical Spiral Coil

Groundcoupledheatpump (GCHP)isalsoclassi callycalledthegroundsourceheatpump ,ortheearthcoupledheat pump ,orthegeothermalheat pump ,thoughtheydonotreallyutilizegeothermalenergyintheclassicalsense .Insteadofhavingitsoutsidecoilsexchangeheatwithair ,itexchangesheatwiththeearthviagroundloopheatexchanger .Itdoesnotutilizegroundwaternordoesitneedreinjectionwellsoranyprotectionagainsterosion ,sotheycanavoidextensiveuseofgroundwaterandtheearthsubsidence .Withnopollutionofwasteheat ,smoke ,andwater,i…     

矿区地面场景三维建模与可视化研究

文章根据矿区的地面环境特征和实体类型,将矿区地面实体分成点、线、面、体四个部分,以ArcEngine为开发平台、Multipath为三维数据模型,动态建立矿区地面三维场景。云南东川某矿的地面场景的三维建模结果表明,该方法具有较高的精度和逼真性。     

创造性思维与思维定势

创造性思维是以创新发展为目的,以发散性求异思维为核心的复杂思维过程。它与再造思维的主要区别在于其思维过程的多维度和思维结果的新颖性。而思维定势主要是一种求同的、单维度的纵向思维,使个体的思维局限于原有的思维框架中,从而构成创造性思维的障碍。     

基于需求导向的旅游政务微博公共信息服务质量优化研究——以山东旅游政务微博为例

旅游政务微博已成为政府官方旅游机构发布和传播旅游信息的重要载体,其信息服务质量的优化对于完善旅游信息服务体系建设和提升旅游品牌形象尤为关键。本研究借鉴扎根理论,对游客的网络评论数据进行三级编码,归纳了网络游客信息需求的4个核心范畴,从而构建了旅游政务微博公共信息服务质量优化的理论模型,最终依据模型提出相关的优化建议。     

通过计算确定地线的埋设方法

接地装置的接地电阻有严格的要求,不同埋设地线的方法会产生不同的接地电阻.通过计算表明,水平埋设LCP长效地线产生的接地电阻最小.     

狭长深基坑开挖引起的地表沉降变形及影响因素分析

狭长深基坑的开挖会对周边环境产生较大影响。鉴于此,文章基于有限元软件MIDAS GTS建立三维模型,重点分析基坑开挖过程中周围地表沉降的发展规律,并将数值模拟结果与施工现场监测数据进行对比,结果表明二者数据吻合良好。在此基础上对狭长深基坑开挖引起的地表沉降变形的影响因素进行分析,结果表明:基坑周围地表沉降值对基坑开挖深度敏感,且随着基坑开挖深度的增加而逐渐增大;地表最大沉降值出现在离墙后约8 m的位置,地表沉降的主要影响范围为0.5He~1.5He;增大地连墙厚度和嵌入深度、减小内支撑水平和竖向间距均使地表沉降值呈现减小趋势。     

地面施工致人损害责任认定及赔偿探讨

地面施工致人损害责任 ,是指依《民法通则》规定的 ,因公共场所、道旁或者通道上挖坑、修缮安装地下设施等 ,没有设置明显标志和采取安全措施而造成他人损害 ,施工人应当依法承担的民事赔偿责任。地面施工致人损害责任适用过错推定责任原则 ,必须依法确认地面施工致人损害责任主体 ,依法追究其应当承担的民事赔偿责任     

从《笨花》看铁凝文学上的突破与发展

铁凝长篇小说《笨花》从史诗品格、风俗画等多方面着笔改变了她以往的写作风格,以一种新的视角关注着历史风云变化下的"世俗烟火",挖掘人性中的大美,关注人民的内在道德和智慧完成了她在艺术和思想上的突破与发展。     

Validation of two accelerometers to determine mechanical loading of physical activities in children

The purpose of this study was to assess the validity of accelerometers using force plates (i.e., ground reaction force (GRF)) during the performance of different tasks of daily physical activity in children. Thirteen children (10.1 (range 5.4–15.7) years, 3 girls) wore two accelerometers (ActiGraph GT3X+ (ACT), GENEA (GEN)) at the hip that provide raw acceleration signals at 100 Hz. Participants completed different tasks (walking, jogging, running, landings from boxes of different height, rope skipping, dancing) on a force plate. GRF was collected for one step per trial (10 trials) for ambulatory movements and for all landings (10 trials), rope skips and dance procedures. Accelerometer outputs as peak loading (g) per activity were averaged. ANOVA, correlation analyses and Bland–Altman plots were computed to determine validity of accelerometers using GRF. There was a main effect of task with increasing acceleration values in tasks with increasing locomotion speed and landing height (P < 0.001). Data from ACT and GEN correlated with GRF (r = 0.90 and 0.89, respectively) and between each other (r = 0.98), but both accelerometers consistently overestimated GRF. The new generation of accelerometer models that allow raw signal detection are reasonably accurate to measure impact loading of bone in children, although they systematically overestimate GRF.