基于ROS的无人派件精灵系统设计

该文主要是对物流配送机器人在校园、社区、室内等环境下的物流配送的"路径规划-包裹配送-运动控制-环境建模-位置定位"展开研究。采用了ROS(Robot Operating System)机器人操作系统作为整个物流配送机器人的核心,通过ROS开源操作系统的功能包结合外围传感器来结合PID算法的差速运动模型来实现对机器人的任意角度运动控制以及远程控制,通过外围传感器进行对周边的环境信息进行感知结合SLAM算法进行二维地图的构建。通过在构建好的地图上进行设计一个起始点和一个目标点,物流配送机器人在该地图中进行路径规划,在规划好的路线执行导航到目标点,在导航的途中遇到障碍物,机器人会自动的避开障碍物或者从新规划路线,从而来实现包裹从起始点到目标点的配送工作。     

低能耗熔盐电解金属锂电解槽的开发及研究

近年来,金属锂在全固态锂电池、铝锂合金制备中发挥着不可替代的价值,但金属锂生产成本仍然是生产企业需要解决的问题。因此,从降低能耗角度优化生产工艺及设备角度利用Solid Works三维建模电解槽结构,以及ANSYS仿真模拟软件对电解槽进行热场模拟及计算,得出最优设计方案。生产电解效率可达到91%,能耗在35 kWh/kg以下,抽氯和集锂装置可以自动运行,抽出氯气浓度90%,集锂效率可达到80%以上,且出锂量较为稳定。该设备可以更好的投入产业化生产,满足企业降低生产成本的需要,促进熔盐电解金属锂行业的发展。     

聚乙二醇双丙烯酸酯交联剂的合成工艺

研究了高吸水性树脂交联剂聚乙二醇双丙烯酸酯的合成工艺。结果表明:在丙烯酸1 mol、n(聚乙二醇)∶n(丙烯酸)=1∶3、环己烷15 mL、甲苯5 mL、催化剂对甲苯磺酸0.018 mol、反应温度90℃和反应时间8 h等试验条件下,产物收率96.7%(x);用优化条件下合成的交联剂制备聚丙烯酸钠高吸水性树脂,其吸水倍率690.2、吸盐水107.5、吸人工尿51.1、吸水速率10.1 s。     

硅粉对直接合成三乙氧基硅烷的影响研究

研究了直接法合成三乙氧基硅烷所用硅粉对合成的影响,结果表明,处理后的硅粉与处理前相比,比表面积增加了181%,对反应有不良影响的元素铁和铅均大幅下降,铁元素减少94.42%;铅元素含量减少93.05%;温度为210℃,其他条件下相同时,处理后的硅粉比处理前反应选择性提高75%。     

双偏心轮定位的柔性夹具及其定位误差计算

设计了一种以双偏心轮为定位元件的柔性夹具,介绍了工作原理和设计计算公式。该柔性夹具适用于对具有圆柱面及圆弧面零件的定位,允许工件直径或半径尺寸在较大范围内变动,能较好地适应多品种、小批量生产方式对夹具的要求。     

金枪鱼渔场分析预报模型及系统的开发

以收集到的卫星遥感反演海表温度和金枪鱼历史捕捞产量资料为基础,统计建立了金枪鱼渔场的贝叶斯概率预报模型.以实现金枪鱼渔场预报为目标,采用控件式地理信息系统(GIS)技术,成功开发了大洋金枪鱼渔场的分析预报系统.对历史数据进行了模型回报试验,试验结果表明,金枪鱼渔场综合预报的准确性达到70%以上,渔场示范试验预报准确性也达到60%以上,对渔业捕捞生产具有一定的指导意义.     

Effects of testing configurations and cell geometries on the performance of a SOFC: A modeling approach

A two-dimensional electrochemical model including mass and charge transfer has been developed to illustrate the effects of testing configurations and cell geometries on SOFC’s performance. The model is favorably validated by the well agreeable experimental results. It is shown that the separation of anode and cathode overpotential by three-electrode method is essentially impractical for anode-supported SOFCs. It is also found that testing configuration has little effect on cell performance due to the high electrical conductivity in anode. Furthermore, because the effective resistance of electrolyte is lower for asymmetric cells than for symmetric cells, cell performance of a symmetric cell is smaller than that of an asymmetric cell. Discrepancy in cell performance is shown to increase with increasing the thickness of electrolyte or decreasing the cathode radii.     

太阳能炕和Trombe墙相结合的新型太阳能采暖系统的数值研究

提出了Trombe墙与太阳能炕相结合的新型太阳能采暖系统,建立了新型太阳能采暖系统的理论模型。采用大连1月份的气象数据对该系统的室内温度、炕表面温度等进行数值模拟,讨论运行方式、有无辅助热源等对室内热环境的影响,并与单独采用太阳能炕或Trombe墙的采暖系统进行对比。计算结果显示,在Trombe墙和新型太阳能炕耦合运行模式,室内温度和炕面温度高于炕单独运行模式或Trombe墙单独运行模式;有辅助加热工况下室内热环境的稳定性优于没有辅助热源工况。     

La0.75Sr0.25Cr0.5Mn0.5O3 as hydrogen electrode for solid oxide electrolysis cells

La_0.75Sr_0.25Cr_0.5Mn_0.5O₃ (LSCM) has been applied as hydrogen electrode (cathode) material in solid oxide electrolysis cells operating with different steam concentrations (20, 40, 60 and 80 vol.% absolute humidity (AH)) using 40 sccm H₂ carrier gas at 800, 850 and 900 °C, respectively. Impedance spectra and voltage-current curves were measured as a function of cell electrolysis current density and steam concentration to characterize the cell performance. The cell resistance decreased with the increase in electrolysis current density while increased with the increase in steam concentration under the same electrolysis current density. At 1.6 V applied electrolysis voltage, the maximum consumed current density increased from 431 mA cm⁻² for 20 vol.% AH to 593 mA cm⁻² for 80 vol.% AH at 850 °C. Polarization and impedance spectra experiments revealed that LSCM-YSZ hydrogen electrode played a major role in the electrolysis reaction.