摘要：经技术、经济比选五种常用的自动灭火系统后,长沙某综合管廊工程消防系统确定采用超细干粉自动灭火系统。采用体积法进行灭火设计计算,灭火浓度为0.15 kg/m3,每具装置的充装量为5 kg,电力舱和综合舱灭火装置布置间距分别为3.3 m和3.2 m。经检验,电力舱和综合舱自动灭火系统开口面积分别占总内表面积的1.56%和1.59%,均小于5%,满足全淹没灭火方式的条件。

摘要：Background:The shortage of donor corneas is a severe global issue,and hence the development of corneal alternatives is imperative and *** attempts to produce artificial cornea substitutes by tissue engineering have made some positive progress,many problems remain that hamper their clinical application *** example,the curvature of tissue-engineered cornea substitutes cannot be designed to fit the bulbus oculi of ***:To overcome these limitations,in this paper,we present a novel integrated three-dimensional(3 D) bioprintingbased cornea substitute fabrication strategy to realize design,customized fabrication,and evaluation of multi-layer hollow structures with complicated ***:The key rationale for this method is to combine digital light processing(DLP) and extrusion bioprinting into an integrated 3 D cornea bioprinting system.A designable and personalized corneal substitute was designed based on mathematical modelling and a computer tomography scan of a natural *** printed corneal substitute was evaluated based on biomechanical analysis,weight,structural integrity,and ***:The results revealed that the fabrication of high water content and highly transparent curved films with geometric features designed according to the natural human cornea can be achieved using a rapid,simple,and low-cost manufacturing process with a high repetition rate and ***:This study demonstrated the feasibility of customized design,analysis,and fabrication of a corneal *** programmability of this method opens up the possibility of producing substitutes for other cornea-like shell structures with different scale and geometry features,such as the glomerulus,atrium,and oophoron.

摘要：集成电路物理设计的测试需随机生成直角多边形以覆盖所有的情况。基于此,提出一种基于解开操作的直角多边形随机生成算法,可应用于超大规模集成电路物理设计算法的测试和分析。该算法随机生成一个点序列,逐一将每对相交的线段解开,直至找不到任何相交线段。对该算法的有穷性作出证明,并以实验证明该算法简单有效。

摘要：本文以海尔港四期防波堤工程为背景,为减小工程造价和精致美观,通过将四脚空心方块与四脚锥块结合,设计了一种改进型四脚空心方块。为验证这种新型块体的稳定性,采用物理实验和数值模拟的方法进行研究。通过试验发现,在极端高水位情况下,块体会出现失稳现象。并通过数值计算,模拟了块体的失稳过程,并分析了块体重量对稳定性的影响。

摘要：为分析钠硫电池加热模块的温升过程,分别基于三维瞬态导热方程和Weibull函数建立了加热模块的理论模型和试验温升数据的拟合模型,数值模拟了钠硫电池加热模块温升过程与瞬态温度分布,探讨Weibull参数对升温曲线的影响规律.结果表明:Weibull拟合模型能够精确描述加热模块的温升过程,可靠度较高;模块内部整体温升率随时间和距离模块中心的长度均呈非线性降低趋势;形状参数和尺度参数分别决定了分段温升和整体温升的效率,这为钠硫电池加热模块以及其他加热装置的优化设计提供参考.

摘要：7075 aluminum alloy is often used as an important load-bearing structure in aircraft industry due to its superior mechanical *** the process of deep hole boring,the boring bar is prone to vibrate because of its limited machining space,bad environment and large elongation induced low *** reduce vibration and improve machined surface quality,a particle damping boring bar,filled with particles in its inside damping block,is designed based on the theory of vibration *** theoretical damping coefficient is determined,then the boring bar structure is designed and *** studies through impact testing show that cemented carbide particles with a diameter of 5 mm and a filling rate of 70% achieve a damping ratio of 19.386%,providing excellent vibration reduction capabilities,which may reduce the possibility of boring ***,experiments are setup to investigate its vibration reduction performance during deep hole boring of 7075 aluminum *** observe more obviously,severe working conditions are adopted and carried out to acquire the time domain vibration signal of the head of the boring bar and the surface morphologies and roughness values of the *** comparing different experimental results,it is found that the designed boring bar could reduce the maximum vibration amplitude by up to 81.01% and the surface roughness value by up to 47.09% compared with the ordinary boring bar in two sets of experiments,proving that the designed boring bar can effectively reduce *** study can offer certain valuable insights for the machining of this material.

摘要：激光照明应用当中激光的高斯分布和散斑现象极大地影响了照明质量,为了将激光器出射的高斯分布的激光整形成类似平顶分布,同时对散斑进行抑制,实现均匀的激光照明,对随机漫射体抑制散斑的可行性进行了探讨。设计了一套基于"随机微透镜阵列"的激光照明系统,可实现出光孔径2mm,半发散角18°的平顶均匀激光照明。并对比了在此种结构下采用石英玻璃棒和自聚焦透镜作为光导元件时光斑质量的区别,对光斑的分布及散斑进行了测量,验证了此种方法能够将散斑对比度降低到4.84%,极大地提升了激光照明质量。

摘要：针对飞机过失速机动飞行控制问题,提出了一种将动态逆与扩张状态观测器相结合进行扰动估计补偿的新思路。根据时标分离原则将飞机状态分为快变量和慢变量,并分别设计了两个回路的动态逆控制器。在快慢回路分别引入扩张状态观测器对系统的不确定部分进行估计补偿,抵消不确定部分对系统动态特性的影响。最后对控制律进行了过失速机动仿真。结果表明,在存在较大参数摄动情况下,设计的控制律能控制飞机跟踪控制指令,表现出良好的稳定性和鲁棒性。

摘要：在讨论竞争情报共享困境的基础上,指出盖瑞.J.米勒的上下级间激励机制可为竞争情报共享提供可能;在分析米勒激励机制假设的基础上,为适应竞争情报共享的需要部分修改了米勒的激励机制假设,并基于团队合作的形式分析上下级间通过有效的利益分配来实现竞争情报共享,设计有效实施上下级竞争情报共享的机制与流程。

摘要：数据访问权是促进数据流通、发掘数据潜在价值的重要制度。欧盟作为访问权制度设计的先行者,通过《数据法案》确立用户对数据的直接访问权和数据携带权,规定用户使用和分享数据的目的不得与数据持有者的竞争性利益相冲突。欧盟将用户的数据权利定位为基于数据生成关系的低位阶权利,仅能实现数据持有者与用户之间的权利分配,难以充分发挥数据在宏观社会资源配置中的价值。根据数据动态分类理论,按数据访问和使用目的所关联的利益对数据进行动态分类,并据此构建两类数据访问权:一是基于价值贡献的访问权;二是基于公共利益的访问权。基于价值贡献的访问权旨在促进数据资源的公平分配,当数据访问目的与数据共同生成者利益相关时,可根据贡献份额共享数据价值,如智能设备制造商利用设备生成数据提升产品质量。数据共同生成者可独立访问其贡献生成的数据,并以合法使用为目的,根据自身开发能力提取数据价值。基于公共利益的访问权旨在实现数据的社会化利用,允许非数据生成者在数据使用目的符合公共利益时访问和使用数据。基于公共利益的访问权可进一步细分为两种类型:一是市场失灵情形下旨在推动社会创新的数据访问权,此时数据持有者的售后市场参与者或补充服务提供者有权向具有潜在垄断地位的企业申请访问开发、发展售后和补充服务市场所必需的数据;二是非市场失灵情形下基于其他公共利益的数据访问权,此时可出于公众健康、科学进步等社会创新之外的其他公共利益而访问数据。数据访问权的具体设计需要平衡数据持有者的合法权益与数据共享所产生的社会利益,如通过限定数据使用目的、设置合理经济补偿等措施,提升数据资源利用的可持续性。