摘要：膨胀珍珠岩颗粒与有机胶合体系复配改性后,经过模压静置加压、保压脱模、热反应固化成型得到有机胶合阻燃热固复合保温板。研究了膨胀珍珠岩颗粒密度、模压比以及用胶量对热固复合保温板力学性能和导热性能的影响,并进行微观分析。结果表明:复配改性阻燃胶合体系能够有效胶结膨胀珍珠岩颗粒,制备的热固复合保温板密度低,抗压强度可达0.31 MPa,导热系数仅为0.054 W/(m·K),且具备A级不燃性能,应用于建筑外墙外保温前景可观。

摘要：We successfully designed and fabricated TES bolometers utilizing Al/Ti bilayer TESs as sensitive *** reduce the intrinsic noise level and tune the saturation power of a bolometer,the TES thermometer is placed on a suspended SiN platform which is thermally coupled to the heat bath by four long SiN beams with different *** measurement results show that the detectors have background limited noise performance,with a low noise equivalent power(NEP)on the order of10-17W/Hz1/2and have a saturation power of several tens pW at a bath temperature of 320 *** detectors are suitable for applications in ground-based astrophysics experiments by integrating absorbers for specific wavelengths.

摘要：太阳能界面蒸发海水淡化是解决淡水短缺问题的有效途径之一。本研究针对现有界面蒸发材料太阳能利用率低、盐堆积严重的问题,以巴沙木为原料制备了一种具有多孔分布、单向通道的生物炭材料。在此基础上原位负载Fe3O4纳米颗粒,有效改善材料的亲水性和光吸收性能。在1 kW/m2的光照强度下,蒸发速率高达1.448 kg·m-2·h-1,光热转换效率最高可达96.1%,实现了较高的太阳能利用率。研究成果对界面蒸发材料的设计具有指导意义。

摘要：In this study, two full-size concrete wails were tested and analyzed to demonstrate the effectiveness of a chemically reactive enamel （CRE） coating in improving their mechanical behavior under blast loading： one with CRE-coated rebar and the other with uncoated rebar. Each wall was subjected in sequence to four explosive loads with equivalent 2, 4, 6-trinitrotoluene （TNT） charge weights of 1.82, 4.54, 13.6, and 20.4 kg. A finite element model of each wall under a close-in blast load was developed and validated with pressure and strain measurements, and used to predict rebar stresses and concrete surface sWain distributions of the wall. The test results and visual inspections consistently indicated that, compared with the barrier wall with uncoated reinforcement, the wall with CRE-coated rebar has fewer concrete cracks on the front and back faces, more effective stress transfers from concrete to steel rebar, and stronger connections with its concrete base. The concrete surface strain distributions predicted by the model under various loading conditions are in good agreement with the crack patterns observed during the tests.

摘要：The coronary artery calcification score and pericardial fat volume have recently been reported to be strongly associated with the severity and presence of coronary atherosclerosis. However, no studies have explored the outcome of phased progression of atherosclerosis by non-contrast computed tomography in asymptomatic people in China. The population-based cohort study in outcome of phased progression of atherosclerosis in China （PERSUADE）, an observational, longitudinal and prospective cohort study in a target population of healthy sub- jects based in Jidong Oilfield （China）, prospectively analyzes the outcome of phased progression of atherosclerosis by non-contrast computed tomography in healthy population. The results of this study are expected to be of value for utilizing noninvasive imaging combine with tradi- tional cardiovascular risk factors to create a risk stratification and find pertinent biomarkers associated with the outcome of phased progres- sion of atherosclerosis in healthy people, thereby could help to establish a more personalized treatment of clinical practice.

摘要：为了在学时少的理论课程教学中将价值塑造、知识传授、能力培养三者融为一体,构建了与民航应用相结合、以问题探究为抓手的“随机信号分析”课程思政教学模式。针对重要知识点,设计与民航发展建设和实际应用相结合的教学案例,通过丰富多样的音视频素材,巧妙且自然地融入思政元素,使学生在学习理论知识的同时,拓宽行业认知,增强职业责任感。改变以理论讲授为主的教学方式,借助与应用案例相结合的演示教学软件和相关科研成果展示,让学生对重要知识点有更直观形象的认识,对应用问题的探究解决过程有更深刻的理解,对前沿科技发展动态和行业发展趋势有更深入的了解。通过开放性课外实验,学生能够自觉复盘应用问题的探究解决过程,巩固对理论知识的理解,增强实践动手能力和创新意识,掌握科学的思维方法,最终实现理论课程育人与育才的统一。

摘要：随着室内混合定位技术的发展,室内路径规划和导航已成为研究热点。常规手机地图主要关注单楼层路径规划,致使用户在多楼层建筑中导航时效率低下。因此,开发高效的手机室内导航系统至关重要。该文利用React框架和Leaflet地图库搭建了系统界面,基于Dijkstra算法设计了跨楼层路径规划模型,使用JavaServlet构建了路径服务小程序,采用MySQL管理GIS数据和关系型数据。系统的功能需求全面考虑了用户群体、基本操作、地图导航、主题设计、错误处理和反馈机制等因素。测试结果表明,该系统能高效准确地实现室内地图导航服务,显著提升了室内导航体验。系统提供的跨楼层路径规划能力为多楼层建筑中的导航需求提供了有效解决方案。该研究为室内导航技术的发展提供了新思路,并为大型商场、机场、医院等多层建筑中的应用奠定了基础。未来应关注系统的扩展性、智能化水平及对不同建筑类型的适应性,以推动室内导航技术的持续进步。

摘要：CO2 is not only the most important greenhouse gas but also an important resource of elemental carbon and *** the perspective of resource and energy strategy,the conversion of CO2 to chemicals driven by renewable energy is of significance,since it can not only reduce carbon emission by the utilization of CO2 as feedstock but also store low-grade renewable energy as high energy density chemical *** studies on photoelectrocatalytic reduction of CO2 using renewable energy are increasing,artificial bioconversion of CO2 as an important novel pathway to synthesize chemicals has attracted more and more *** simulating the natural photosynthesis process of plants and microorganisms,the artificial bioconversion of CO2 can efficiently synthesize chemicals via a designed and constructed artificial photosynthesis *** review focuses on the recent advancements in artificial bioreduction of CO2,including the key techniques,and artificial biosynthesis of compounds with different carbon *** the basis of the aforementioned discussions,we present the prospects for further development of artificial bioconversion of CO2 to chemicals.

摘要：考虑滤波器时滞对受控系统的影响,研究受控输出时滞系统的稳定性能。根据稳定性切换理论,确定多自由度受控系统的稳定时滞区域。经过分析获得受控系统脉冲响应衰减时间接近最短时的时滞量,在此基础上采用时滞引入法和滤波器设计法进行控制器设计。结合悬臂梁模型进行数值分析,结果表明:根据时滞系统稳定性分析设计的控制器能够使受控系统脉冲响应衰减速度提高80%以上,有效改善系统的控制效果和稳定性能。

摘要：涡轮叶尖间隙影响着发动机的性能,涡轮典型部件的冷热态尺寸换算是间隙设计的重要内容。介绍了应用优化设计将涡轮典型部件热态尺寸换算到冷态尺寸的方法,应用此方法对某型涡轮叶片进行分析,比较了优化算法与简化算法的结果,表明优化算法的结果是合理的,此方法是可行的。同时将其应用于某涡轮盘的冷、热态尺寸换算,从而成功地解决了涡轮典型部件冷、热态尺寸换算问题。