摘要：为实现低成本高精度的室内定位,在综合考虑定位需求和计算复杂性的基础上,设计了一种基于简易视觉标签的室内高精度定位技术。采用简单的颜色和形状特征检测视觉标签,从而降低检测复杂度,减少数据存储需求,针对简易标签特征不唯一问题,设计了基于相机视场和标签方位角的快速查询匹配方法。通过分析标签分布特性与定位误差关系,设计加权最小二乘位姿估计算法,建立迭代求解和最优估计的协同策略,实现了算法复杂度和定位精度的良好平衡。仿真和实验结果表明:所提定位方法能够有效处理超定方程组奇异问题,抑制不良标签组的负面影响,与超宽带技术相比,定位误差降低超过62%。

摘要：针对某敞口集装箱船在试航过程中出现的绑扎桥、桥翼、舵机间振动问题,采用有限元法进行振动分析。研究发现,改变绑扎桥下方支撑结构对绑扎桥固有频率的影响有限,适当削弱支撑结构可起到减振效果;封闭式桥楼的振动很难通过改变局部结构的方式控制,可通过增加主机横撑的方式解决;舵机间位于螺旋桨正上方,螺旋桨二阶及三阶激振力均会造成一定影响,设计时应考虑足够的频率储备。

摘要：Heavy-payload forging manipulators are mainly characterized by large load output and large capacitive-load *** relationship between outputs and inputs,which will greatly influence the control and the reliability,is the key issue in type design for heavy-payload forging *** this paper,a type design method by considering the incidence relationship between output characteristics and actuator inputs is presented and used to design the mechanism for forging *** concept of modeling method based on the outputs tasks is defined and *** principle of type design from the viewpoints of the relationship between output characteristics and actuator inputs is *** idea of establishing the incidence relationship between output characteristics and actuator inputs is *** incidence relationship matrix between outputs and inputs is also *** design flow is obtained,and the incidence relationship between outputs and inputs for heavy-payload forging manipulators is divided into three parts after detailed understanding of the functional *** types of mechanisms for heavy-payload forging manipulators are given,and the corresponding spatial mechanical sketches are also drawn,some new designed mechanisms have been adopted by company or used as *** novel forging manipulators which satisfy certain functional requirements provide an effective help for the design of forging manipulators and patent application.

摘要：自动疼痛评估在临床上具有巨大的应用前景,其中通过面部视觉信息进行识别因其可行性受到了人们的关注.现有方法多关注于不同模态、不同尺度特征的提取,没有考虑不同疼痛强度对应面部特征的差异,无法有效区分疼痛等级.因此,提出了一种基于对比学习的疼痛评估方法.该方法基于有监督对比学习的方法设计了新的损失函数,以此充分学习不同疼痛程度下的面部差异;其次,为了更好地利用预测值和真实值之间的差异信息,设计了自适应权重更新方法联合优化上述的对比学习损失和均方误差损失.实验在UNBC-McMaster肩痛数据集上进行评估,结果超过了当前最新的相关研究,表明将不同疼痛强度下的面部差异纳入考虑有利于提高识别准确率,验证了该方法的有效性.

摘要：针对超大埋深极高地应力硬岩隧道灾变问题,选择相对应的支护方法,能够有效缓解高地应力下硬岩隧道危害事件。采用有限差分数值模拟软件FLAC3D和数值模拟离散元软件3DEC,分析应力释放的布置方式和深度、喷射混凝土厚度以及锚杆长度和间距等参数对高地应力硬岩隧道灾变控制效果的影响。依托龙门山高地应力隧道,研究不同支护结构对降低高地应力硬岩隧道岩爆等级的影响,总结提出高地应力硬岩隧道灾变防控方案。预测施工建造过程中隧道岩爆发生等级,并针对不同岩爆等级下的支护体系进行智能设计,给出合理的支护参数。研究结果表明:提升应力释放孔的数量和深度可以有效释放掌子面及前方围岩的能量;增加喷混厚度可以提高隧道结构的整体安全性,降低岩爆等级,但是随着厚度的增加效果会逐渐减弱;锚杆能够有效缓解岩爆的发生,特别是在其长度达到塑性区的深度之后效果最好,锚杆间距也能有所减小;最终基于确定的支护结构,推测施工建造过程中岩爆发生的等级,智能设计出不同的支护结构方案,得到不同岩爆等级下的合理支护参数。

摘要：人工智能已经在多个角度融入了设计领域。本文通过多个人工智能的案例分析,探讨了人工智能时代下的创意设计,以及人工智能在设计领域的历史发展和影响。随后本文进行了人工智能辅助的平面创意设计和座椅形态创意设计实践。该人工智能系统通过训练和学习,生成了具有特定风格的平面创意设计图,以及31万把座椅的创意设计草图,以帮助设计师发散思维,激发灵感。最后本文分析了人工智能与设计协同共进的必然性,以及未来交叉融合的发展方向。

摘要：A model of the solution space for all the sensor mechanisms based on the Stewart platform is established, which is a novel and useful tool for investigation of the optimal sensor design. A kind of performance evaluation atlases are plotted within the model of the solution space, which clearly show relationships between the condition number of Jacobjan matrix and parameters of all the sensor mechanisms. By using the performance atlases, an optimal design for the sensor mechanism can be achieved. Because the elastic joints are proposed for replacing the spherical joints, the Stewart platform based sensor can be designed as small as possible.

摘要：Thanks to the special physical architectures and various locomotion gaits,snake robots may offer significant benefits over traditional legged or wheeled locomotion designs in vast types of *** paper proposes an innovative snake robot with digitally-actuated Stewart platforms as its modules and mainly focuses on the simulations of various snake *** categories of fitting algorithms are elaborated in simulations of lateral undulation and Configuration-Fitting Algorithm of Four Modules is demonstrated as a universal gait fitting algorithm for all kinds of snake robots with binary *** typical snake gaits are simulated and the results demonstrate the excellent mobility of the snake robot.

摘要：Ocean wave energy converters(WECs) are obtaining more and more attentions in the world. So far, many types of converters have been invented. Oscillating body systems are a major class of WECs, which typically have one degree of freedom(DOF), and the power absorption efficiency is not quite satisfactory. In this paper, a 3-DOF WEC is proposed and a simplified frequency-domain dynamic model of the WEC depending on the linear potential theory is conducted. The performances of three geometries of the oscillating body including the cone, the cylinder and the hemisphere have been compared, and the results show that the hemisphere is more suitable for the 3-DOF ***, the relationship among the parameters of the hemisphere is established based on the equal natural frequencies of the heave and pitch(or roll) motions, and the results show that lowering the center of gravity leads to the better power absorption in the pitch(or roll) motion. In the end, the power matrixes of different sizes of the hemispheres under different irregular waves are obtained, which can give a size design reference for engineers.

摘要：深部巷道大变形已成为深部煤炭安全高效开采的关键制约因素。为实现深部软弱围岩稳定性控制,提出了基于深部巷道大变形演化过程的分步联合支护方案及其理论分析模型。结果表明,深部软弱围岩呈破裂碎胀变形-损伤扩容变形-连续变形的分布特征。分步联合支护后,围岩极限承载力随锚杆和锚索等效支护力增大呈线性增大趋势,但随注浆修复系数呈指数增大趋势。锚杆和锚索支护设计时应以极限承载力所需的注浆修复系数等于1.0时的等效支护力临界条件为基准。深浅孔注浆支护时须同时考虑注浆修复系数和围岩破裂区半径。不同支护措施的协同支护参数可由破裂修复区围岩极限承载平衡条件确定。数值模拟和工程应用分析表明,分步联合支护可实现深部软弱围岩碎胀大变形控制,具有较高的工程推广应用价值。