摘要：高熵非晶合金结合了传统非晶合金的结构无序性与高熵合金的化学无序性,具有良好的热稳定性、磁学性能、耐腐蚀性以及生物相容性等,因此成为近年来的研究热点之一。本文首先介绍了高熵非晶合金的概念与起源,随后对其成分体系、制备方式以及各种性能做出总结,从材料体系与制备方式两方面分析了高熵非晶合金形成非晶结构的原因,并解析了高熵非晶合金具有良好力学性能、热稳定性以及耐腐蚀性的机理,最后展望了采用材料计算实现高通量的材料设计,重点探究材料的组合性能、涂层等新的制备方式,并且指出解决基础理论问题是促进该材料发展的重要前提。

摘要：This paper considers the adaptive tracking problem for a class of first-order systems with binary-valued observations generated via fixed thresholds. A recursive projection algorithm is proposed for parameter estimation based on the statistical properties of the system noise. Then, an adaptive control law is designed via the certainty equivalence principle. By use of the conditional expectations of the innovation and output prediction with respect to the estimates, the closed-loop system is shown to be stable and asymptotically optimal. Meanwhile, the parameter estimate is proved to be both almost surely and mean square convergent, and the convergence rate of the estimation error is also obtained. A numerical example is given to demonstrate the efficiency of the adaptive control law.

摘要：The underwater dry maintenance method based on a dry cabin can achieve the same maintenance quality provided on *** establishment of a reliable seal between the dry cabin and the pipe is a prerequisite for the formation of a dry *** this paper,an airbag is proposed as the means to seal the dry *** finite element software was used to study the influence of the physical characteristics of the airbag on deformation characteristics and sealing *** also studied the adaptive sealing mechanism of the airbag under the time-varying gap *** simulation results show that the peak contact stress of the airbag is close to the gas pressure,so the hardness and thickness of the airbag have little effect on *** time-varying gap conditions,the required inflation pressure increases with the size of the *** simulated relationship between the gap and the inflation pressure can be referred to in order to guide the control of the air pressure of the airbag during actual ***,the similarity between the test results and simulation results demonstrates the accuracy of the simulation results.

摘要：In this study,we designed an oil-filled motor that can be used at full-ocean depths,and investigated the friction losses caused by the rotating seal and the properties of the *** direct current(DC)motor is encapsulated in an aluminum alloy housing.A rubber diaphragm is used to balance the internal and external pressures so that the motor can work on the seabed without pressure *** study the resistance caused by the rotating seal,a numerical model of the Glyd ring and the rotating shaft was *** from a rotational torque test agreed with those from numerical *** kinematic viscosity of four oils was measured at 1-25℃.Oil bath experiments in an incubator showed that the resistance from oil is highly correlated with its dynamic *** appears to be very suitable as an insulating oil for these *** working characteristics of the motor were tested in a high-pressure *** results showed that the motor needs to overcome higher oil resistance under higher pressure.A prototype of a pressure-adaptive motor was designed and applied successfully in the hadal zone at a water depth of more than 10000 m.

摘要：隐逸作为一种古老而深刻的生活哲学,强调内心世界,倡导追求内心的宁静和自由。隐逸绘本作为一种直观的视觉媒介,不仅限于寓教于乐,还可推动读者深入探索内心世界、寻求心灵慰藉和启示。以蔡皋绘本作品《桃花源的故事》为研究对象,从隐逸视角探讨其对读者心理的影响和心灵疗愈的潜力,并从作品源头、文本题材、视觉表现、意识追求等方面探索当代绘本创作的方式方法。研究发现:绘本创作旨在触动读者情感,引导并期待个性化反馈;隐逸绘本的价值超越画面本身,核心在于读者基于个人理解所赋予的深层意义,通过构建返璞归真的叙事空间,引领读者超越现实,实现心灵的治愈与成长,从而定义作品的理论与实践价值。从隐逸文化切入,深度剖析绘本《桃花源的故事》,是从跳脱客观社会框架的“人本位”角度进行的艺术作品探索,对未来隐逸绘本作品发展与创作研究具有重要参考意义。

摘要：双波段窄带热辐射器在红外传感、加密、检测等众多领域具有重要的应用潜力。这种辐射器能够提供集中且精确的红外辐射能量,从而提高红外技术的灵敏度和分辨率。不过,在不同波段构建窄带辐射的条件通常会相互制约,同时实现双波段窄带热辐射仍具有一定的挑战性。本文提出了一种新型无需光刻的红外双波段窄带热辐射器。该辐射器由铝薄膜上非周期性的交替沉积Ge和YbF_(3)薄膜组成,Ge和YbF_(3)薄膜组成的分布式布拉格反射镜和铝基底在一定条件下可以激发Tamm等离激元(Tamm Plasmon Polaritons,TPPs),从而实现窄带辐射。首先使用多目标粒子群优化算法对辐射器的结构参数进行优化,以满足双波段TPP的激发条件。实验结果也验证了双波段辐射器在中波红外和长波红外波段具有窄带辐射的特性。本文提出的方法也可用于多波段辐射调控器件的设计,从而可以应用于多气体传感和多带红外伪装等领域。

摘要：在自主设计的长度和内径均为25 cm的圆柱形容器中,开展了不同掺氢比(χ)的氢气–甲烷–空气泄爆实验。实验结果表明:χ对容器内部超压有显著影响,容器内共出现三类压力峰值(p_(1)、p_(2)、p_(3))。p_(1)是泄放速率超过了燃烧产物生成率导致的,并出现在χ0.3时,容器内最大超压随着χ单调增加。χ>0.15时,外部爆炸的最大超压也随着χ的增加而增加。

摘要：公共艺术教育是中国大学生艺术教育的一个重要组成部分.地方高等学校是培养社会建设中坚力量的重要场所,本文对地方高校公共艺术教育的功能目标、现状问题及改革措施进行探讨,为高校人才综合素质培养提供参考.

摘要：常用的多因素实验设计类型有:析因设计、嵌套设计、裂区设计、重复测量设计。要做到正确处理这几种易混淆的多因素实验设计定量资料,必须掌握以下几个鉴别多因素设计定量资料的关键点。[第一段]

摘要：近年来,国内机器视觉发展速度较快,应用广泛。由于视觉系统需要处理视频图像信息,计算量较大,因此当前该系统多采用计算机系统进行搭建。为此,提出将嵌入式与视觉系统结合应用的思想,并利用视觉系统和嵌入式智能系统易于信息集成的特点,设计了一种基于DSP和uC/OS-Ⅱ的视觉系统。该方案主要包括硬件软件及操作系统的设计,大大提高了生产的效率和自动化程度,对实现视觉系统在采摘机器人中的应用具有重要意义。