摘要：Recently,organ-on-chips have become a fast-growing research field with the widespread development of microfluidic chips and synthetic materials in tissue *** to the existing cardiotoxicity of many cardiovascular drugs,heart-onchips which are promising to replace traditional animal models have been extensively researched and developed to mimic human organ functions in *** heart-on-chips mainly focus on cardiac mechanics,which is regarded as the central indicator of in vitro heart models and drug *** methods for the detection of myocardial mechanics have been demonstrated complex and inefficient in ***,photonic crystal materials with unique optical properties have attracted interests and have been introduced into the heart-on-chips,developing a visualized self-reporting system for cardiomyocytes activity *** this review,photonic crystal-based heart-on-chips for biosensing are introduced,as well as the fabricationmethods and design criteria of *** characterizations of the photonic crystal materials are classified into optical properties and structural properties,and their applications in cell culture and biosensing are further ***,several representative examples and developments of the integration of photonic crystal materials into microfluidic chips are described in ***,potentials and limitations are put forward to promote the development of the photonic crystal-based intelligent heart-on-chips.

摘要：Structural colors,derived from existing natural creatures,have aroused widespread attention in the materials regulation for different ***,inspired by the color adjusting mechanism of hummingbird,we present a novel shape-memory structural color hydrogel film by introducing shape memory polymers(SMPs)into synthetic inverse opal scaffold *** excellent flexibility as well as the inverse opal structure of the hydrogel films imparts them with stable stretchability and brilliant structural *** from the transient structural anisotropy of copolymers,the hybrid films are possessed with shape-morphing behaviors *** on the shape transformations and color responsiveness performance,we have demonstrated diverse structural color actuators with complex shapes for different ***,as the photothermal responsive graphene quantum dots were integrated into the hydrogel,the hybrid films could also be endowed with the feature of light-controlled reversible deformation with synchronous structural color *** features demonstrate that the presented shape-memory structural color hydrogel film is valuable for soft robotics with multifunctions of sensing,communication and disguise.

摘要：小型集水区对气候变化和人类活动极为敏感,而渗漏屏障作为一种自然洪水管理(NFM)策略,以其减缓洪水和生态优势受到重视。文章以Web of Science数据库为基础,对渗漏屏障的作用进行了系统性综述,从洪水控制和生态保护两方面做了深入的归纳与分析。研究表明,渗漏屏障有效地削减洪峰,增加地下水补给,改善水质,并提高河岸带的水土保持能力。此外,渗漏屏障促进了生物多样性和生态系统服务,提供了丰富的微生境,增强了水生生物的栖息和繁殖条件。同时,文章总结了渗漏屏障存在的问题,并提出了对渗漏屏障应用的建议,为环境管理者和工程师提供决策和实施指导。

摘要：提出1种以CC2530芯片为硬件平台,软件采用TI公司的ZigBee协议栈ZStack,同时结合蓝牙通信技术的办公系统优化设计,实现了根据环境因素自动控制照明设施、对使用者进行疲劳报警、通过手机对系统监测控制等功能.实验中采用节点连接传感器和照明设施模拟办公环境,PC端软件模拟手机应用,较好地实现了相应功能,体现了系统的集成性、易用性、经济适用性、扩展性和人性化等特点.

摘要：为了解决工业废水处理过程中分离效率低、运行能耗高的问题,设计搭建了一套新型的机械蒸汽再压缩(MVR)耦合中空纤维真空膜蒸馏系统,考察了耦合系统的运行特性,并开展了不同进料条件及长时间运行下系统对氯化铵溶液蒸发的试验研究。结果表明,当进料液氯化铵质量分数、进料液温度、进料液流量和真空侧压力分别为5%、75℃、10 m^(3)/h和24 kPa时,产水速率和产水电导率基本稳定在45.9 kg/h和11.9μS/cm,分离效率为99.9%,单位加热能耗(SHEC)为118.5 kW·h/t。随着进料液氯化铵质量分数的增加,产水速率减小,SHEC增加;而随着进料液温度和进料液流量增加,产水速率增加,SHEC减小。经过240 h运行试验,膜污染并未明显影响产水水质,但降低了产水速率,经膜清洗后,产水速率可恢复至原来的96.1%,该系统能够高效分离氯化铵溶液,回收能源,应用前景非常广阔。

摘要：海洋地震拖缆控制器系统是一种控制拖缆位置的系统。由于拖缆存在负浮力及容易受风、浪、流的干扰,如何精确控制水下深度是一个难题。针对系统具有非线性、时变不确定、强干扰、很难建立数学模型等特点,提出了模糊-PID控制的方法,建立了数学模型,设计了模糊-PID控制器,并用Matlab软件对其建模、仿真和优化。仿真结果表明,与传统PID控制相比,模糊-PID控制具有更高的稳态精度和更快的动态响应速度,能有效减小在勘探过程中由于拖缆位置的偏移而产生的误差,具有工程应用价值。

摘要：针对高速列车地板型材结构低频段振动噪声问题,基于局域共振机理,设计一种新型的陀螺声子晶体结构。首先基于有限元方法,建立陀螺型声子晶体单元模型,计算得到单胞的能带结构,结合其振动模态,分析108 Hz~153 Hz弯曲波带隙和129 Hz~153 Hz完全带隙的形成机理,并探究结构参数对带隙特性的影响。然后建立周期排布的陀螺型声子晶体型材板件模型,计算在垂向单位均布力激励下陀螺型声子晶体型材板的振动传递损失,最后结合参考铝型材结构,探究陀螺型声子晶体结构对于隔声效果的影响。研究表明:增大元胞边长和基体板厚,带隙特性有向低频段、窄带隙的发展趋势;增加头环高度,带隙特性有低频拓宽的趋势;而增加弹性连接件高度,对带隙特性无明显影响。在弯曲波带隙范围108 Hz~153 Hz内,有限声子晶体板结构的振动传递损失相比通带范围较明显的提高,且在110 Hz以下频段对于参考铝型材隔声效果有一定的改善。

摘要：采用"实验组控制组前后测准实验设计"对97名高中生进行为期12周的生命教育课程干预。运用《生命意义体验问卷(MLQ-P)》测量两组学生实验前、实验后、实验后3个月生命意义感得分之变化,发现实验组生命意义感得分显著提高,控制组无显著变化;实验结束后3个月,实验组生命意义感得分仍显著高于控制组。说明生命教育课程对改善高中生生命意义感具有明显成效。

摘要：壁流式蜂窝陶瓷因具有耐高温、耐腐蚀等优良性能,可应用于工业高温含尘烟气净化。本文设计了一套高温含尘烟气发生装置、过滤性能和反吹洗再生性能测试装置,研究了烟气参数和顶膜对壁流式蜂窝陶瓷在高温环境下的过滤性能和再生性能的影响。结果表明:随气体流速增大,过滤压力呈线性增加,当流速为1.88 cm/s时,涂膜后过滤压力为437 Pa,比未涂膜过滤压力的375 Pa高16.8%;随温度增大过滤压力增大,从20℃上升至432℃,压降从470 Pa升高到1080 Pa,且温度越高增长速率越快;未涂膜壁流式蜂窝陶瓷随着过滤时间延长,反吹洗再生效果越来越差,过滤压力不断增大,且出口细粉尘颗粒较多,过滤性能较差;涂膜后的壁流式蜂窝陶瓷在连续运行3000 min内用0.4 MPa的反吹压力进行测试,其再生效果好,系统具有较稳定过滤压力,且涂膜后过滤效率达99.9%,证明顶膜的应用使其具有很好过滤性能和再生性能。