Love 当手机爱上电池……

当手机爱上电池,会怎么样?充足了电的电池让手机充满能量,手机让沉默的电池有机会付出说话的力量,嘿嘿,小时候老师就说过,这是拟人手法。反过来看看,如果我们是家用电器又会怎么样?生活、爱情,用了拟物的手法,也许会有你意料外的面目哦。趣味占卜题的做法通常都很简单,现在     

汶川地震引发高速远程滑坡运动机理数值模拟研究——以谢家店子滑坡为例

针对汶川地震引发的谢家店子滑坡,在现场调查分析的基础上,建立了二维离散元数值模拟模型,采用2D-Block软件对其进行了全过程的数值模拟研究,并通过对跟踪块体的深入分析,研究了相应地质体在不同阶段下的运动特征。模拟结果表明,谢家店子滑坡经历了剧动启程抛掷阶段、快速撞击飞行阶段、铲刮减速碎屑流阶段及堆积掩埋阶段。为了揭示地震引发高速滑坡的发生规律,分别研究了地震震级、斜坡地形和斜坡上岩块的尺寸对高速滑坡启动和运动过程的影响规律。地震震级对边坡的启动、变形、破坏和运动有很大的影响,地震震级越大,滑体启动的加速度和速度也就越大,从而易形成高速远程滑坡。斜坡体本身的地形地貌对滑体运动也有较大影响。在震级和岩石力学参数一定的条件下,斜坡上岩块的大小对其启动、变形和运动过程有一定影响,随着岩块的增大,滑体运动的每个阶段历时都在减小,但当岩体十分破碎时,滑体虽然能够运动,但是很难发生抛掷。将地震滑坡的启动机理概括为积累变形效应、振荡启程效应和振荡加速效应。     

我为妈妈设计生日餐桌

下个月就是妈妈的生日了,为报答妈妈平时对我的宠爱,我恳请爸爸让我来设计妈妈的生日餐桌.当然,我答应让爸爸做我的营养顾问和主厨,否则爸爸是不会答     

从“政府主导”向“政府引导”

习近平总书记在中央城镇化工作会议上提出新型城镇化建设要“看得见山,望得见水,留得住乡愁”,避免急于求成的大拆大建,尽可能在原有村庄形态上改善居民生活条件,发展有历史记忆、地域特色、民族特点的美丽城镇,充分体现出以人为本的思想。此外,总书记在视察北京时提出要不断健全城市管理体制,提高城市管理水平的要求。本文以长辛店棚户区为例,基于中央对城镇化建设及城市管理的新要求,通过政府定位的转变和工作方式的创新,     

CY-4呋喃树脂的研制与应用

以糠醇和糠醛等为原料缩合 ,研制了 CY- 4呋喃树脂 ,介绍了其物理机械性能和耐化学腐蚀性能 ,以及作为防腐蚀材料的使用实例     

Influence of rare earth nanoparticles and inoculants on performance and microstructure of high chromium cast iron

The high chromium cast irons (HCCIs) with rare earth (RE) nanoparticles or inoculants were fabricated in the casting process. The phase compositions and microstructure were analyzed by X-ray diffraction (XRD) and optical microscopy (OM), respectively. The hardness and impact toughness were tested by Rockwel-hardmeter and impacting test enginery. And then, the morphology of fracture was researched by scanning electron microscopy (SEM). The results demonstrated that the phase compositions of HCCIs with addition of RE nanoparticles or inoculants which were M7C3 carbides + α-Fe did not change obviously. However, the prime M7C3 carbides morphology had great changes with the increase of RE nanoparticles, which changed from long lath to granular or island shape. When the content of RE nanoparticles was 0.4 wt.%, the microstructure of high chromium cast iron was refined greatly. The microstructure of carbides was coarser when the addition of RE nanoparticles was higher than 0.4 wt.%. The hardness and impact toughness of HCCIs were improved by addition of RE nanoparticles or inoculants. The impact toughness of HCCIs was increased 36.4% with RE nanoparticles of 0.4 wt.%, but the hardness changed slightly. In addition, the adding of RE nanoparticles or inoculants could reduce the degree of the brittle fracture. Fracture never seemed regular, instead, containing lots of laminates and dimples with the increase of the RE nanoparticles. The results also indicated that the optimal addition amount of the RE nanoparticles was 0.4%, under this composition, the microstructure and mechanical property achieved the best cooperation. In addition, through the study of erosion wear rate, when adding 0.4% RE nanoparticles into the HCCIs, the erosion wear rate got the minimum 0.32×10-3 g/mm2, which could increase 51.5% compared with that without any RE nanoparticles.     

基于SoA的OA系统设计方案研究

介绍了传统办公自动化系统构架,C/S模式显然不能满足互联网环境下办公人员的需要。基于校园办公自动化系统的应用发展需求,在设计OA(office automation)系统的功能时,增加了移动办公、可视办公和协同办公模块。最后,在传统OA系统设计方案的基础上,利用SOA(service-oriented architecture)的集成技术和Web service访问便捷的优点,提出了一种基于SOA的新办公自动化系统设计方案。     

基于GPS无源雷达干扰抑制研究

基于GPS辐射源的无源雷达,利用目标对非合作GPS信号的反射工作,具有很强的反侦察、抗隐身及生存能力.由于基于GPS的无源雷达系统,回波信号非常弱,故回波信号的干扰抑制及有效信号的获取是其信号处理非常重要的内容.对基于GPS辐射源的无源雷达回波信号中的直达干扰采用自适应滤波的方法进行抑制,对多径干扰提出采用功率倒谱分析...