Terrain Reconstruction from Contours by Skeleton Construction

Generating terrain models from contour input is still an important process. Most methods have been unsatisfactory, as they either do not preserve the form of minor ridges and valleys, or else they are poor at modeling slopes. A method is described here, based on curve extraction and generalization techniques, that is guaranteed to preserve the topological relationships between curve segments. The skeleton, or Medial Axis Transform, can be extracted from the Voronoi diagram of a well-sampled contour map and used to extract additional points that eliminate cases of flat triangles in a triangulation. Elevation estimates may be made at these points. Based on this approach it is possible to make reasonable estimates of slopes for terrain models, and to extract meaningful intermediate points for triangulated irregular networks (TINs).     

Highly Stable Potassium Metal Anodes with Controllable Thickness and Area Capacity

K metal battery is a kind of high-energy-density storage device with economic advantages. However, due to the dendrite growth and difficult processing characteristics, it is difficult to prepare stable K metal anode with thin thickness and fixed area capacity, which severely limits its development. In this work, a multi-functional 3D skeleton (rGCA) is synthesized by simple vacuum filtration and thermal reduction, and K metal anodes with controllable thickness and area capacity (K content) can be fabricated by changing the raw material mass and graphene layer spacing of rGCA. Moreover, the graphene sheet layer of rGCA can relax stress and relieve volume expansion; carbon nanotubes can serve as the fast transport channel of electrons, reducing internal impedance and local current density; Ag nanoparticles can induce the uniform nucleation and deposition of K⁺. The K metal composite anodes (rGCA-K) based on the conductive skeleton can effectively suppress dendrites and exhibit excellent electrochemical performance in symmetric and full cells. The controllable fabrication process of stable K metal anode is expected to help K metal batteries move toward the stage of commercial production.     

基于自顶向下设计模式的桥式起重机主梁设计

介绍了自顶向下的设计过程和实施方法，并以某型号桥式起重机主梁的自顶向下设计为实例，研究了以“顶层基本骨架”模型为核心的自顶向下设计过程，实现了该主梁的设计和装配。论述了基于自顶向下设计模式的优势和设计中需要注意的问题。     

骨架镍催化剂在腈类加氢中的应用

介绍3种类型骨架镍催化剂在己二腈加氢中的应用,并对加氢结果进行比较。结果表明,3种类型骨架镍催化剂均可以实现己二腈加氢,己二腈转化率和己二胺选择性较高。同时对其他二腈如2-甲基戊二腈和丁二腈进行加氢研究,进一步表明骨架镍在腈类加氢中具有独特优势。     

光纤环及其骨架材料膨胀系数测量方法研究与实现

介绍了一种光纤环及其骨架膨胀系数的简易测量方法,并组建了测量系统。利用铝材和不锈钢,对系统的可行性进行了验证,同时用该系统测量了光纤环及不同骨架的膨胀系数,并对实验数据进行了分析研究,实验结果表明:该系统能够为找出与光纤环相匹配的骨架材料提供技术支撑,具有一定的实用和推广应用价值。     

熔渗法制备Ti_3SiC_2陶瓷中硅的熔渗时间研究

以Ti/TiC/Si粉末为原料,采用液态熔渗硅方法制备出高纯的Ti3SiC2材料,并且从理论上推导液态熔渗硅方法制备Ti3SiC2陶瓷材料时熔渗时间与预制骨架高度之间的关系式,并通过熔渗实验进一步验证该关系式的可靠性。研究表明,熔渗时间随熔渗高度与熔渗温度的改变而变化。在保证毛细管力的前提下,毛细管半径越大,熔渗速度越快,熔渗时间越短。     

影响日光温室钢骨架结构安全及耐久性能因素分析

日光温室作为设施农业生产的主要载体,得到了广泛的应用.但是,我国目前还没有适用的日光温室设计、制造和施工标准,不合理的设计、施工存在较大的安全隐患,并对其耐久性能产生影响.在对影响目光温室钢骨架结构安全、耐久性能因素分析基础上,提出改进建议.     

单兵装备人机工效知识图谱构建技术

为改善单兵装备人机工效领域知识共享困难、利用效率低的现状,提出基于“一致性检验”与“语料评价”的骨架法应用策略。构建单兵装备人机工效领域知识本体,对本体网络进行质量评估与优化;搭建基于“半指针-半标注”抽取思路的联合抽取模型,进行领域知识文本中重叠三元组的自动化信息抽取,F1-score达到0.82;基于Neo4j构建单兵装备人机工效知识图谱,对图谱的应用方式进行讨论。结果表明:以主客观评价结合的骨架法应用策略能够提高知识本体构建效率,达到较好的语料数据覆盖效果;单兵装备人机工效知识图谱能为领域知识的共享与重用提供数据支撑与技术手段。     

Thin,Deformable, and Safety‐Reinforced Plastic Crystal Polymer Electrolytes for High‐Performance Flexible Lithium‐Ion Batteries

A new class of highly thin, deformable, and safety‐reinforced plastic crystal polymer electrolytes (N‐PCPEs) is demonstrated as an innovative solid electrolyte for potential use in high‐performance flexible lithium‐ion batteries with aesthetic versatility and robust safety. The unusual N‐PCPEs are fabricated by combining a plastic crystal polymer electrolyte with a porous polyethylene terephthalate (PET) nonwoven. Herein, the three‐dimensional reticulated plastic crystal polymer electrolyte matrix is formed directly inside the PET nonwoven skeleton via in‐situ UV‐crosslinking of ethoxylated trimethylolpropane triacrylate (ETPTA) monomer, under co‐presence of plastic crystal electrolyte. The PET nonwoven is incorporated as a compliant skeleton to enhance mechanical/dimensional strength of N‐PCPE. Owing to this structural uniqueness, the N‐PCPE shows significant improvements in the film thickness and deformability with maintaining advantageous features (such as high ionic conductivity and thermal stability) of the PCE. Based on structural/physicochemical characterization of N‐PCPE, its potential application as a solid electrolyte for flexible lithium‐ion batteries is explored by scrutinizing the electrochemical performance of cells. The high ionic conductance of N‐PCPE, along with its excellent deformability, plays a viable role in improving cell performance (particularly at high current densities and also mechanically deformed states). Notably, the cell assembled with N‐PCPE exhibits stable electrochemical performance even under a severely wrinkled state, without suffering from internal short‐circuit failures between electrodes.