图书馆模态升级

图书馆的运行模式和表现形态自20世纪以来有了很大改观，随着网络、信息、数字化的接踵而至，我们也应当看到这场“风暴”对图书馆带来的前所未有的冲击，本就图书馆的网络化、资源协作、公共关系等模式进行了分析。     

商用车驾驶室声腔声学模态试验与计算模态分析

阐述了声学模态有限元法的基本原理与声学模态的求解方法;以某商用车驾驶室内声腔为研究对象,介绍了声腔有限元简化模型的建模方法,以及多参考最小二乘复频域模态参数识别(Poly Max)方法的原理;论述了驾驶室内声腔声学模态试验的方法和步骤.结果显示,与试验模态频率相比,计算模态频率的误差率在6%以内,试验与计算的模态振型基本一致.这表明文中驾驶室声腔有限元简化模型的建模方法是准确的.     

车载双联液化气气瓶框架优化设计

对车载双联液化气气瓶框架结构进行轻量化设计。依据模态分析理论,构建有限元分析模型,对笼式焊接框架和轻量化设计框架进行模态分析比较,轻量化框架模态频率分布优于笼式焊接框架。按垂向冲击、紧急制动冲击和转弯冲击三种典型强度冲击工况对框架进行强度分析,工况强度均小于材料许应强度,符合强度安全设计要求。装车30 000km综合路面测试,产品没有发现损坏或外观缺陷。轻量化气瓶框架在保障结构安全及设计性能指标的基础上,可实现批量化生产。     

单层球面网壳屋盖屈曲有限元分析

以单层球面网壳屋盖为研究对象,对50m、30m跨单层球面网壳进行了屈曲有限元分析研究,考虑了不同支座、跨度对结构屈曲特征值的影响,得到了一些重要结论,为单层球面网壳的设计、研究和应用提供了一定的参考和借鉴.     

创伤性近侧指间关节屈曲挛缩治疗方法的探讨

目的:对创伤性近侧指间关节挛缩的发病机制和治疗方法进行探讨。方法:对1995～2000年在我院治疗的创伤性近侧指间关节屈曲挛缩病例进行回顾,指间关节挛缩的发病机制,根据关节内外粘连的不同因素进行松解手术治疗。结果:创伤性近侧指间关节屈曲挛缩的病变可分为关节内粘连、关节外粘连及复合性粘连。经过:(1)单纯松解掌板延长及屈指浅肌腱切断等手术。(2)手术加牵引术,取得了良好结果。平均改善关节活动度达100度(屈)(伸)-10度。结论:(1)创伤性近侧指间关节屈曲挛缩的发生与早期处理不当有关。(2)粘连可以是关节内或关节外因素及复合因素造成。(2)手术治疗配合术后牵引治疗可取得良好的效果。     

＂Turkish Five＂：Their Contributions to Contemporary Piano Music and Piano Education in Turkey

First musicians using polyphony and homophony in their compositions can be seen during the 19th century in Turkey. These talented amateur composers, who worked in simple forms, such as marches or educational music, were not actually professional composers but either orchestral or choral directors. Later, during the Republic period （after 1923）, ＂Turkish Five＂ emerged. ＂Turkish Five＂ consisted of professional composers who were educated in Europe and learned western musical forms. These musicians, according to their birth years, are Cemal Resit Rey （1904-1985）, Hasan Ferit Alnar （1906-1978）, Ulvi Cemal Erkin （1906-1972）, Ahmet Adnan Saygun （1907-1991） and Necil Kazan Akses （1908-1999）. ＂Turkish Five＂ achieved important accomplishments and did significant contributions to Turkish contemporary music in 30-40 years with their efforts. While doing this, they used over 500-year old musical legacy of the West. At the beginning, these musicians used Turkish folk tunes and their rhythmic and modal system, however, later, they began to use ＂impressionism＂, ＂neo-classicism＂ and finally ＂atonalism＂ in their music. In the current study, the contributions of ＂Turkish Five＂ to contemporary Turkish piano music and their approaches to piano education were examined via literature review. After an extensive research with the literature on the topic, the researcher has interviewed with six piano teachers from different music institutions in Turkey （including two schools of time arts, two conservatories and two music teacher training schools）. During these interviews, the contributions of the ＂Turkish Five＂ were examined based on ＂relativity＂ and ＂local to global＂ principles in education, and the researcher has searched for the ways to use more of their music in piano education through the interviews. Therefore, the main purpose of the study was to discover ways to implement more of the music by ＂Turkish Five＂ in piano education in Turkey and to ffmd solutions fo     

弹性有限长度杆在轴向应力波传播和反射过程中的屈曲

讨论弹性有限长度杆端部受冲击载荷作用，在轴向应为波传播和反射过程中的动态屈曲问题．利用扰动方程的解、端部支承条件和应力波反射前后波阵面相容条件得到了动态屈曲的分叉条件，临界载荷和屈曲模态．数值结果表明：临界载荷有多个分支且随时间增加而降低；由于应力波在端部的反射，使临界载荷进一步下降．这个结果就解释了实验中的一些现象．     

电力系统多模态低碳电力调度策略分析

电力调度优化是一项长期的工程和课题,需要随着电力系统的发展而变化,而且在不同的时刻和状况下会具有不同的调度模型和优化方案。随着环境污染问题的不断加剧,低碳电力越来越重要,因而发电设备需要配置碳捕集设备进行低碳运行,从而满足相关的标准。为了更有效地进行后续的低碳调度分析,对碳捕集技术的相关理论进行了分析和说明,针对碳捕集设备对于发电厂电价的影响,建立了低碳调度的相应模型,得到正常模态和附加模态下的系统约束条件,构建相应的低碳调度运行策略。并在IEEE30节点系统中对其进行验证分析,得到了正常模态和附加模态下的低碳电力调度策略的有效性。     

思辨能力的培养与多模态外语教学设计

CHEN Zhiwu(City Institute,Dalian University of Technology,Dalian,Liaoning 116600,China)     

微型汽车变速器箱体有限元模态分析

变速器是汽车传动系统的主要部件之一,它的振动必然带来汽车整车的振动和噪音,影响汽车的整车性能,特别是轿车的乘坐舒适性。本文以奥托汽车变速器为研究对象,基于Solid Works建立奥托汽车变速器的三维实体模型,并利用COSMOS Works建立箱体的有限元模型,完成了该汽车变速器箱体的模态分析。分析结果可为为箱体的结构设计提供依据。