摘要：Multi-interface engineering is deemed as an effective strategy to boost catalytic activity via electronic structure modulation. However, it is still a big challenge due to the phase-separation tendency. Herein, we designed CoP-WP heterojunctions with multi-touch interfaces using Co_(8)W_(18), a definite structure polyoxometalate-based polynuclear cobalt molecular cluster, as a precursor. The Co P-WP heterojunctions anchored on reduced graphene oxide(Co P-WP/r GO)were obtained by growing Co_(8)W_(18)on GO followed by phosphorization. The intrinsic {Co-O-W} coordination modes in Co_(8)W_(18)are conducive to the formation of the multiple interfaces between CoP and WP. The abundant intimate interfaces in Co P-WP heterojunctions promote the electron transfer from WP to Co P, thus regulating the interfacial electronic structure and optimizing the hydrogen adsorption free energy(ΔGH*), as verified by X-ray photoelectron spectroscopy analysis and theoretical calculations. Furthermore, the integration of r GO provides Co P-WP/r GO with a large surface area and high conductivity, aiding mass transport and charge transfer. Co P-WP/r GO exhibits remarkable hydrogen evolution reaction(HER) activity with low overpotentials of 96, 130,and 138 m V at 10 m A cm^(-2)in alkaline, acidic and neutral media, respectively, and has long-term durability. Our discovery provides an opportunity to design heterojunction materials with multi-coupled interfaces at low-cost and efficient HER catalysts.

摘要：阐述计算机三维动画在职业教育中的应用案例,包括制作教育动画、设计虚拟实验室、构建模拟环境。分析计算机三维动画在虚拟现实中面临的应用挑战、提出解决方案。

摘要：针对低频超声测井仪声波发射、数据采集及数据传输于一体的控制要求,设计了一种基于DSP+FPGA异构控制技术的新型主控系统。该系统使用DSP作为主控制器,通过CAN总线与井下电缆遥传通信,根据接收的指令产生控制时序,使用有限状态机完成工作流程控制,创新性地采用基于加权马氏距离的健康度评估方法评判仪器工作状态。使用FPGA作为从控制器,采用指令数据通道独立控制方法实时转发控制指令,同步声波激发与采集,实时接收声波数据。采用基于自定义并口双口RAM的协同通信机制完成DSP与FPGA之间的数据传输。采用差分传输技术实现与发射系统、采集系统之间的通信。测试表明:该主控系统通信误码率低,控制实时性高,状态评估准确,具备声波发射、数据采集及数据传输一体化控制能力,满足低频超声测井仪控制要求。

摘要：Development of cost-effective,active and durable electrocatalysts for overall water splitting is still a huge ***,we have constructed one-dimensional(1D)cobalt sulfide and vanadium sulfide heterojunction nanowires arranged on carbon cloth(Co_(9)S_(8)-V_(3)S_(4)/CC)as bifunctional electrocatalysts for the efficient overall water *** 1D wire-structured Co_(9)S_(8)-V_(3)S_(4)heterojunctions possess large surface area,plentiful active sites and rapid transport of electrons/reactants and the release of ***,the electron transfer from Co9S8 to V3S4 occurs at the interface due to the strong electronic coupling effect in Co_(9)S_(8)-V_(3)S_(4)heterojunction,in which the electron-attracting V3S4(V2^(+))optimizes the adsorption of H*active species for hydrogen evolution reaction(HER),while the electron-losing Co9S8(Co3+)responds to the enhancement of oxygen evolution reaction(OER)***_(9)S_(8)-V_(3)S_(4)/CC exhibits low overpotentials of 85 and 232 mV at 10 mA cm^(−2)and small Tafel slopes of 51 and 59 mV dec^(−1)for HER and OER,***,the electrolyzer with Co_(9)S_(8)-V_(3)S_(4)/CC as both the anode and cathode requires low onset voltage of 1.35 V and cell voltage of 1.53 V at 10 mA cm^(−2)and exhibits high Faradaic efficiencies and robust *** can be driven by a solar cell(1.53 V)for continuous production of hydrogen and *** study highlights the design of 1D sulfide heterojunction in pursuit of highly efficient electrocatalysts for overall water splitting.

摘要：The design of the electrode with high-area and mass capacitance is important for the practical application of supercapacitors. Here, we fabricated the porous NiCoP nanowalls supported by Ni foam(NiCo-P/NF) for supercapacitors with win-win high-area and mass capacitance. The NiCoOH nanowall precursor was prepared by controlling the deposition rate of Ni^2+ and Co^2+ on NF through a sodium acetate-assisted(floride-free) process. After the phosphorization, the NiCo-P nanowalls formed with high loading about8.6 mg cm-2 on NF. The electrode combined several advantages favorable for energy storage: the plentiful pores beneficial for ion transport, the nanowalls for easy accommodation of electrolyte, good conductivity of NiCo-P for easy transport of electrons. As expected, the NiCo-P/NF exhibited a high specific mass capacitance(1,861 F g^-1 at 1 A g^-1,1,070 F g^-1 at 10 A g^-1 and high area capacitance(17.31 F cm-2 at 5 mA cm-2 and 10 F cm^-2 at 100 mA cm^-*** asymmetric supercapacitor(ASC) composed of NiCo-P/NF positive electrode coupled with commercial active carbon negative electrode exhibited a high energy density of44.9 W h kg^-1 at a power density of 750 W kg^-1. The ASC can easily drive fans, electronic watch and LED lamps, implying their potential for the practical application.

摘要：本文重点从负载变化、谐波、环境影响三方面分析了潮汐能发电机组升压变压器独特的使用要求,据此提出了在选型设计时应考虑的因素,具体从防腐与防护、铁芯设计、谐波电压、容量等方面详细叙述了选型和设计要求。结合实际工程数据列举了容量选取的有关验证计算过程,重点分析了谐波电流、谐波电压对变压器制造和运行的影响,最后从节能减碳的角度提出了创新应用思路并加以推广。对潮汐能变压器选型、设计和制造将具有普遍的指导和借鉴意义。

摘要：为便于提取射频信号两正交分量进行分析,以赛灵思FPGA架构为平台,基于其内嵌高速串行收发模块,设计了基于Aurora的多通道高速可配置数据采集系统.系统可通过多速率时钟发生器LMK03806输出改变高速AD的采样时钟实现采样率可配置.系统底层硬件参数都通过程序封装为控制字指令的形式,可由上位机下发串行指令实时控制.最终实现了多通道一致性且采集工作同步实时进行,采集后的数据经过对齐、排序、打包后基于高速串行协议上传准确无误.

摘要：针对某铅酸电池厂10 kV供电线路电压降问题,从电网结构因素、原供电设计、厂内无功补偿配置、厂内生产设备消耗无功情况几方面进行深入分析,总结出了电压降大的几点原因。根据这几点原因一一提出了解决方案,以及铅酸电池厂供配电设计和运维过程中应注意的事项和相关建议。

摘要：针对微电阻率扫描成像测井仪极板的出厂检测效率低、现场维修人员占用率高等问题,设计基于FPGA的微电阻率扫描成像测井仪极板检测装置。该检测装置提供极板所需的±5 V电源、时钟信号、复位信号和24路正弦电流信号,使用16位模数转换器采集极板输出的电压信号,采用FFT算法分析信号包含的频率点及其对应的幅度,采用频率—幅度双参数评判法评判极板功能是否正常,并通过LED灯指示检测结果。测试表明:该检测装置能准确检测极板24路信号频率和幅度,准确评判极板功能正常与否,并直观指示检测结果,可应用于极板出厂时的高效检测以及仪器损坏时的现场检修。

摘要：现代能源体系是中国实现建成社会主义现代化强国目标的重要动力支撑,数字技术是现代产业发展的重要引擎。本文从阐述中国现代能源体系的内涵特征入手,揭示数字技术在其中的重要意义。从马克思社会再生产四个环节视角出发,剖析数字技术赋能现代能源体系构建的理论机制:在生产环节促进能源及下游产业效率提升、协作深化、结构优化;在交换环节提高能源市场竞争性、供需动态平衡性与交易安全性;在分配环节改善能源资源空间错配局面,实现公平的能源转型;在消费环节促进绿色能源消费方式的形成,提供多元化用能场景。数字技术赋能现代能源体系建设的过程中也产生了诸多现实问题。为更好发挥数字技术的赋能作用,需要加强能源数字化顶层设计、加快培育复合型人才、加速部署数字基础设施、消除城乡能源数字化发展鸿沟、出台政策法规保障市场安全竞争。