摘要：Nickel(Ni)-based materials act as one of the most promising candidates as platinum-group-metal-free(PGM-free)electrocatalysts for hydrogen oxidation reaction(HOR)in alkaline ***,the electrocatalytic activity of pure Ni is significantly limited due to the sluggish kinetics under alkaline *** accelerate the kinetics,constructing heterostructures and nitride structures have been developed as two representative ***,we combined the two methods and presented a facile synthesis of the sheet-like Ni_(3)N/MoO_(2)in-plane heterostructures for enhanced HOR in alkaline *** to Ni or Ni_(3)N,the Ni_(3)N/MoO_(2)in-plane heterostructures exhibited a significantly increased mass activity by 8.6-fold or 4.4-fold,*** studies revealed that the enhanced activity of Ni_(3)N/MoO_(2)could be attributed to the weakened hydrogen adsorption and strengthened hydroxyl *** work provides a facile approach to design high-efficiency catalysts for hydrogen-oxidation catalysis and beyond.

摘要：【目的】补偿装置对高压齿轮泵的设计至关重要,为实现内啮合齿轮泵的压力提升,需对补偿装置进行精确建模。【方法】在分析径向补偿机理的基础上,详细分析装置在过渡区的压力分布规律,推导出在一个周期内过渡区的压力分布规律,根据内外月牙块力的平衡条件,建立装置的数学模型。并根据补偿装置中月牙块边界,密封棒、弹簧的分布夹角等设计参数,利用MATLAB程序计算压力补偿腔的夹角范围,最后进行试验研究。【结果】在排量为101.2 mL/r,压力为20.2 MPa,转速为1800 r/min条件下,补偿腔夹角为30.12°,泵的容积效率可达93.6%。【结论】泵运行过程无异常,无卡滞“抱死”的现象,补偿装置设计有效。

摘要：基因型与环境的互作效应(G·E)决定作物在多生态环境中产量性状的稳定性,研究红花G·E互作效应对花瓣产量稳定性的影响有重要意义。采用随机区组试验设计,选用7个红花品种,4个试验点,3次重复,测定各品种花瓣产量,运用AMMI模型对红花品种的基因型、环境及G·E互作效应进行了分析。基因型、环境及G·E互作效应均达到极显著水平,基因型占总变异的15.94%、环境效应占16.29%,G·E互作效应占47.64%,表明G·E互作效应对产量变化的影响远大于基因型和环境。互作效应主成分计算出基因型稳定性参数(Dg),顺序为‘YN1805’>‘YN2057’>‘YN512’>‘YN495’>‘YN1959’>‘YN2527’>‘弥渡红花’(CK)。运用AMMI模型有效地解释了红花品种产量性状的基因型、环境和G·E互作效应。根据产量、稳定性参数及AMMI模型分析结果,高产而又稳定的品种有‘YN1805’和‘YN2057’,高产而又不稳定的品种有‘YN512’和‘YN1959’,不高产也不稳产的品种有‘YN495’、‘YN2527’和‘弥渡红花’(CK)。在红花生产中,应选用产量高、适应性强的品种。

摘要：杂散电流干扰是影响埋地钢质管道安全运行的重要因素。针对现有杂散电流检测设备功能单一,精度不高,配置软件易用性差等问题,设计了一种基于STM32和LabVIEW的埋地钢质管道杂散电流检测系统,能够同时测量多种杂散电流干扰评价指标。该系统由采集系统和上位机两部分组成,采用模块化方式设计采集系统硬件电路,采用LabVIEW软件和MATLAB软件联合编程搭建上位机。实验结果表明,系统测量误差小于0.1%,满足标准要求。该系统具有现场应用推广的可行性。