摘要：基于适航条款FAR25.795和咨询通告AC25.795-6,结合灾难性故障状态对飞机和乘客的影响程度,确定最小风险炸弹位置(LRBL)结构的设计要求是结构实现单向爆破功能的概率大于1−10^(−9),提出了一种高可靠单向爆破的LRBL结构的设计技术。首先根据LRBL结构将爆炸产生的能量沿指定方向释放到客舱外部的防爆原理,设计LRBL结构方案是由端盖、罐体以及剪切销三部分组成的圆筒结构,然后利用LS-DYNA软件对内爆作用下LRBL结构的塑性应变进行研究,分别讨论了不同炸药位置和结构尺寸对LRBL结构各危险部位塑性应变的影响,最后开展了LRBL结构实现单方向爆破功能的可靠性分析,利用拉丁超立方抽样获取输入样本,通过爆炸仿真获得输出样本,采用K-S检验分析其概率分布特征,并基于故障树模型计算可靠度。结果表明:所提出的结构厚度为20 mm、剪切销直径为14 mm的LRBL结构设计方案,其实现单方向爆破功能的概率为1−4.07×10^(−10),能够满足LRBL结构的设计要求,可为国产飞机LRBL结构的适航验证和适航审定提供技术支撑。

摘要：雅乐观念初现非国家礼乐核心为用。“国乐”“正乐”“华夏正声”是国家礼乐核心为用的成熟雅乐观念。当外来乐舞进入,梁武帝萧衍以中原乐制定位“国乐以雅为称”,创制“十二雅”,以一雅对应一层级;隋文帝杨坚认知金石乐.悬领衔乐队以“华夏正声”定位,在太常专设雅部乐;玄宗朝《开元礼》以“十二和”与多种乐舞定位雅乐,面对不同仪式对象有选择组合,用于国家吉礼,亦与鼓吹乐共用于嘉、军、宾礼最高仪式,国家雅乐观念呈现出成熟样态。所谓典雅、精雅、雅致乃至雅化概念非“雅乐--正乐”,以礼乐而非以雅乐论的“六乐”为雅乐元典“乐经”之意义。

摘要：The Plus Width Module (PWM) in microprocessors is commonly used in motor control field. If the ordinary PWM peripherals output PWM waveform, the software must calculate the period and duty cycle number based on the microprocessor’s system clock cycle first, and then write them into the registers. As all known, the microprocessor without hardware calculator consume very long time in multiplication and division. In order to reduce the CPU’s running time, a calculation hardware unit was designed to calculate the waveform parameters. The software only need to write the period (Hz units) to the period register and the duty cycle (% units)to its register. This hardware unit was designed with Verilog HDL and running in the Nios Ⅱ system successfully.

摘要：基于生态学视角,从用材、工艺、设计等方面分析了高椅古村家具的生态特征,阐述了高椅古村家具生态选材的生命之美、生态工艺的和谐之美、生态设计的创造之美,揭示了侗族家具设计独特的形态语义、感性意象和文化内涵,在展现湖南湘西特色家具文化生态特征的同时,更好地传承发展地域性家具文化,推动家具设计者的审美需求向生态健康转变,促进生态文明发展。

摘要：自两周以来,传统国家用乐由制度下生存的职业乐人创承发展,形成具有多功能的礼乐和俗乐两条主脉,并呈体系化演进。在制度性规定下,国家用乐的礼俗两脉互为张力,呈多种形态有序发展。其中俗乐一脉,因区域文化土壤丰沃,文人与职业乐人互动,创造了具有引领意义的体裁类型和作品,对国家用乐有实质性影响,并在国家制度保障下前行。如唐代由太常分立国家俗乐机构教坊,在其发展过程中逐渐礼俗兼具,在地方官府用乐中作为标识存在。只有建立共时与历时相结合的认知视角,才能厘清国家用乐的区域存在和民间积淀,把握传统音乐文化的内涵。

摘要：本文旨在创新住宅不锈钢厨柜产品设计方法,满足消费者对厨柜产品的个性化需求,提升产品核心竞争力。以轻定制理论和模块化设计方法为指导,并以住宅不锈钢厨柜产品为设计对象,对现有不锈钢厨柜使用功能和不锈钢厨柜结构进行分析,将不锈钢厨柜产品进行模块划分,并根据结构和模块组合方式的不同,设计了三种形式的模块化组合的不锈钢厨柜产品:总线模块化组合方式下的框架式不锈钢厨柜产品、分段模块化组合方式下的板件式不锈钢厨柜产品和槽接模块化组合方式的柜体式不锈钢厨柜产品。最后发现,轻定制不锈钢厨柜产品通过多样化的模块化设计,可提高企业生产效率,降低轻定制厨柜产品的终端服务成本,并能给消费者提供更多产品配置选项和体验,满足消费者主权时代的个性化需求。

摘要：报道了基于梯度能带结构的高速室温中波红外HgCdTe器件,器件设计为n-on-p同质结结构,在300 K的零偏压条件下达到了1.33 ns(750 MHz)的总的响应时间,相对于非制冷的碲镉汞器件和工作于高偏压下的碲镉汞APD器件响应速度有所提高。基于一维模型的分析表明,吸收层中的组分梯度可以形成内置电场并改变了载流子的输运特性,该模型由不同组分梯度的HgCdTe器件的实验对比验证。因此,此项工作优化了高速HgCdTe中波红外探测器的设计,并为设计超快中波红外光电探测器提供了一种可行的思路。

摘要：The interest in curtailing environmental pollution issues through physical separation processes has inspired an extensive search for novel nanoporous materials with exceptional adsorption *** triazine frameworks(CTFs),emerged as a class of crystalline covalent organic frameworks(COFs),have been widely examined for various separation applications,owing to their large porosity,high stability,and rich nitrogen(N)*** development of CTFs for efficient adsorption of mercury(Ⅱ)(Hg^(2+))is of great importance for the field,whereas it is rarely attempted,on account of limited synthetic strategies and unknown structural-property relations of conventional CTFs derived from ionothermal ***,we report rational synthesis of a crystalline CTF with methylthio pendant arms for efficient removal of Hg^(2+)with an exceptional capacity of 751 mg·g^(-1),ranking at the top among previously-reported *** work may open up new possibility in the synthesis of COFs for various separations.

摘要：Because of its high purity and excellent orientation, mesophase pitch is a superior precursor for high-performance car-bon materials. However, the preparation of top-notch mesophase pitch faces challenges. Catalytic polycondensation at low temperat-ures is more favorable for synthesizing mesophase pitch, because it circumvents the high-temperature free radical reaction of other thermal polycondensation approaches. The reaction is gentle and can be easily controlled. It has the potential to significantly im-prove the yield of mesophase pitch and easily introduce naphthenic characteristics into the molecules, catalytic polycondensation is therefore a preferred method of synthesizing highly spinnable mesophase pitch. This review provides a synopsis of the selective pre-treatment of the raw materials to prepare different mesophase pitches, and explains the reaction mechanism and associated research advances for different catalytic systems in recent years. Finally, how to manufacture high-quality mesophase pitch by using a cata-lyst-promoter system is summarized and proposed, which may provide a theoretical basis for the future design of high-quality pitch molecules.

摘要：为了实现从前鼻孔进镜对鼻黏膜表面进行直接显微成像,从而进行无创性观察和测量在体鼻纤毛运动,设计了一种能够分辨鼻纤毛,并且带有30°视向角的变倍硬性显微内窥镜。所设计的硬性内窥镜系统物方数值孔径为0.15,分辨率为272 lp/mm,工作距离为3.00 mm,视向角为30°,物面高度为0.40 mm,系统总长度为205.62 mm,物方口径为4.65 mm,放大倍率为6×~10×。此鼻黏膜纤毛显微内窥镜将可以避免取材造成的纤毛功能损害和受试者痛苦,极大地提高纤毛相关疾病的临床诊断能力,成为助益纤毛领域科研和临床工作的重要突破。