摘要：高温超导磁体具有零电阻特性,通过适当的磁化过程,就可以在没有外部电源的情况下保持强磁场.使用商用高温超导带制造的眼型高温超导磁体已经证明了其具有稳定的强磁场捕获能力,并且相对于传统超导块材,其尺寸更加灵活.然而,在场冷磁化过程中,由洛伦兹力引起应力应变可能会对磁体造成损伤.因此,在本论文的研究中,建立并验证了三维数值计算模型,以研究混合眼型高温超导磁体中的应力和应变.计算了场冷磁化下磁体的应力分布,并讨论了样品的固定方法对应力集中和应变的影响.研究还发现,增强中心捕获磁场的高温超导带材堆叠块体在磁化过程中受到不平衡的洛伦兹力,这是由于眼型磁体的不对称捕获磁场而导致的,此不平衡力产生在高温超导堆叠中的不对称应力分布.这些发现为眼型高温超导磁体的机械行为提供了重要的见解,可以指导其设计的优化,以适应各种应用,如核磁共振、磁悬浮和高温超导电机等.

摘要：A combination of hydrogels and microfluidics allows the construction of biomimetic three-dimensional(3D)tissue models in vitro,which are also known as *** hydrogel patterningwith awell-controlled spatial distribution is typically achieved by embedding sophisticated microstructures to act as a ***,these physical barriers inevitably expose cells/tissues to a less physiologically relevant microenvironment than in vivo ***,we present a novel dissolvable temporary barrier(DTB)strategy that allows robust and flexible hydrogel patterning with great freedom of design and desirable flow stimuli for cellular *** key aspect of this approach is the patterning of a water-soluble rigid barrier as a guiding path for the hydrogel using stencil printing technology,followed by a barrier-free medium perfusion after the dissolution of the *** and multiple tissue compartments with different geometries can be established using either straight or curved DTB *** effectiveness of this strategy is further validated by generating a 3D vascular network through vasculogenesis and angiogenesis using a vascularized microtumor *** a new proof-of-concept in vasculature-on-a-chip,DTB enables seamless contact between the hydrogel and the culture medium in closed microdevices,which is an improved protocol for the fabrication ofmultiorgan ***,we expect it to serve as a promising paradigm for organ-on-a-chip devices for the development of tumor vascularization and drug evaluation in the future preclinical studies.

摘要：Tissue engineering approaches,including those to functional lung tissues,are finely honed by the inclusion of upgraded devices that mimic biophysical and biochemical features in *** culture is one of these essential biophysical characteristics enabled by the introduction of microfluidic devices in recent *** review links the importance of dynamic culture for in vitro maintenance of functional lung cells to the modeling of respiratory *** identify and discuss different parameters for fabricating the requisite microfluidic models for lung cells,as well as their application in modeling lung diseases caused by external factors such as smoking and *** possibility of creating a multi-organ-on-a-chip to establish a more physiologically relevant model is ***,the focus is on different prospects for the in vitro modeling approach and for lungs-on-a-chip for developing advanced,reliable technology to analyze the pathophysiology of respiratory diseases and screen potential treatments.

摘要：本研究进行了微带贴片天线线性阵列的优化设计。通过猫群算法(Cat swarm optimization,CSO)优化天线阵列辐射方向图的各控制参数。通过优化每个单元的激励电流权重和阵元间隙获得各向同性天线单元阵列的最佳辐射方向图。以12、16和20单元的天线阵列为例,运用MATLAB进行阵列优化设计,采用CST-MWS对设计结果进行仿真验证。由仿真结果可见,CSO能给出微带贴片天线线性阵列的最优设计。

摘要：Similarity measure construction has been proposed as fault detection of flight test method in order to obtain the primary control surface stuck and the combination stuck of primary *** measures were obtained through analyzing the certainty and uncertainty of fuzzy membership functions,which were designed based on well-known Hamming *** was applied to the fault detection of primary control surface stuck of uninhabited aerial vehicle(UAV).At post-failure control surface,if the UAV is controllable and trimmable using other control surfaces,the UAV is able to fly or return to the safety region through reconfiguration of flight control *** detect the fault,similarity measure computations were carried *** result could be applicable with the real-time parameter estimation *** monitoring the value of coefficients due to the control surface deviation,it becomes aware that the control surface fault occurs or *** control surface stuck position and value were separated by comparing the trim value with the reference *** is the advantage of increasing in reliability without adding sensors or with additional low cost.

摘要：铝硫二次电池是一种具有高能量密度、廉价原材料、有前途的替代储能装置.然而,铝硫电池面临着一些障碍,尤其是穿梭效应.本工作设计了一种硫分散均匀的无粘结剂S@Ti_(3)C_(2)T_(x)三明治结构薄膜.二维层状材料Ti_(3)C_(2)T_(x)不仅具有粘结剂和导电剂的功能,而且是一种很有前途的硫锚定载体.S@Ti_(3)C_(2)T_(x)膜在300 mA g^(−1)时显示出初始容量为489 mA h g^(−1),并在280圈稳定循环后保持为415 mA h g^(−1),平均库仑效率约为95%.该薄膜的容量和稳定性均高于采用浆料涂覆法制备的S+Ti_(3)C_(2)T_(x)正极(初始容量为317 mA h g^(−1),循环160圈后衰减为222 mA h g^(−1)).S@Ti_(3)C_(2)T_(x)膜在铝硫电池中的容量主要来源于S^(2−)和S之间的可逆氧化还原反应.这种新颖的二维材料与可控的电极结构设计相结合,为铝硫电池的发展铺平了道路.

摘要：It is a well-established fact that wireless sensor networks (WSNs) are very power constraint networks, but besides this, they are inherently more fault-prone than any other type of wireless network and their protocol design is very application specific. Major reasons for the faults are the unpredictable wireless communication channel, battery depletion, as well as fragility and mobility of the nodes. Furthermore, as traditional protocol design methods have proved inadequate, the cross-layer design (CLD) approach, which allows for interactions between different layers, providing more flexible and energy-efficient functionality, has emerged as a viable solution for WSNs. In this study we define a fault tolerance management module suitable to the requirements, limitations, and specifics of WSNs, encompassing methods for fault detection, fault prevention, fault management, and recovery. The suggested solution is in line with the CLD approach, which is an important factor in increasing the network performance. Through simulations the functionality of the network is evaluated, based on packet loss, delay, and energy consumption, and is compared with a similar solution not including fault management. The results achieved support the idea that the introduction of a unified approach to fault management improves the network performance as a whole.

摘要：新半小的 waterplane 区域双胞胎壳(一行) 的水动力学分析对象小、中等的尺寸旅客渡船那样的各种各样的应用合适被介绍。这可以是源于合并二古典形状的一种吸引人的转线路配置：常规一行和快长筏。最后的壳设计与最大的横梁展出像楔的吃水线形状在严厉；壳与一个很狭窄的入口角度结束，有典型地代表一行容器的一个突出的球状的弓，并且展示完整对严厉安排 waterjet 推进器。我们与如此的建筑群执行对壳的水动力学表演的一个初步的评价的分析目的在常规头波浪在平静的水和经得起海上风浪的能力里以壳的抵抗塑造两个并且把表演与常规一行的作比较。分析用 preliminarily 在一个常规一行容器上被验证的一个边界元素方法被执行。

摘要：Fuzzy entropy was designed for non convex fuzzy membership function using well known Hamming distance *** proposed fuzzy entropy had the same structure as that of convex fuzzy membership *** procedure of fuzzy entropy was proposed by considering fuzzy membership through distance measure,and the obtained results contained more flexibility than the general fuzzy membership ***,characteristic analyses for non convex function were also *** on the mutual information were carried out through the proposed fuzzy entropy and similarity measure,which was also dual structure of fuzzy *** the illustrative example,mutual information was discussed.

摘要：Similarity measure design for discrete data group was proposed. Similarity measure design for continuous membership function was also carried out. Proposed similarity measures were designed based on fuzzy number and distance measure, and were proved. To calculate the degree of similarity of discrete data, relative degree between data and total distribution was obtained. Discrete data similarity measure was completed with combination of mentioned relative degrees. Power interconnected system with multi characteristics was considered to apply discrete similarity measure. Naturally, similarity measure was extended to multi-dimensional similarity measure case, and applied to bus clustering problem.