摘要：This paper describes the design of a FeWOx-based oxygen carrier for the chemical partial oxidation of methane(CLPOM).Thermodynamic screening and kinetic analyses both forecast the FeWOx-based oxygen carrier as a promising candidate for the production of *** total methane conversion and syngas yield can be dramatically increased with this catalyst compared to the case with the unmodified WO3/SiO2,thereby enabling CLPOM with 62%methane conversion,93%CO gas-phase selectivity,94%H2 selectivity,and a 2.4 H2/CO *** catalyst has the advantages of high availability of lattice oxygen to oxidize carbonaceous intermediates in time,together with the formation of an Fe-W alloy to promote the surface ***,it demonstrates excellent catalytic performance with no catalyst deactivation at 900°C and 1 *** excellent structural stability plays an essential role in *** revealed via XPS and ICP,the phase segregation has not been observed due to the strong interaction between Fe and W,which resulted in the formation of the Fe-W alloy during the reduction processes and the match between the ion oxidation rates of the Fe and W ions in the oxidation *** results provide fundamental information on the reaction mechanism of FeWOx/SiO2,and present it as a promising candidate for CLPOM.

摘要：Constructing well-defined interfaces in catalysts is a highly effective method to accelerate reactions with multiple *** this study,we developed a heterostructure catalyst combining fcc NiCu and hcp Ni_(3)N,aiming at achieving superior performance in alkaline hydrogen *** NiCu/Ni_(3)N not only overcomes the inadequate hydroxyl binding energy performance of NiCu alloys but also solves the problems of insufficient active sites found in most Ni/Ni_(3)*** results and density functional theoretical calculations reveal that the formation of heterostructure significantly depends on the amount of *** approach effectively prevents the side effects of increased catalyst particle size,typically resulting from the high temperatures and prolonged reaction times required for conventional synthesis of Ni/Ni_(3)*** interface of this heterostructure induces a distinctive overlapping effect that enhances the adsorption of water and lowers the energy barrier for the rate-determining *** NiCu/Ni_(3)N catalyst shows an impressive activity of 71.8 mA mg^(-1) at an overpotential of 50 mV,a 14.7 times efficiency enhancement compared to pure Ni and comparable to that of low-loaded commercial Pt/*** research highlights the potential of NiCu/Ni_(3)N in advancing catalyst development.

摘要：基于2011—2021年中国30个省、直辖市和自治区(西藏自治区、台湾省、香港和澳门特别行政区数据暂时缺失)的面板数据,采用考虑非期望产出的Super-EBM-undesirable模型,测度能源碳排放效率。在分析能源碳排放效率时空特征的基础上,构建Tobit回归模型,运用中介效应方法,实证检验数字普惠金融如何促进能源碳排放效率的改善,得到如下结果。1)中国能源碳排放效率在研究时段呈现小幅度波动变化趋势,2013年为最高点(0.529),2021年为最低点(0.501)。各地区能源碳排放效率存在显著差异,东部地区最高,中部和西部地区次之,东北地区最低。2)数字普惠金融发展水平的提高能够显著地促进能源碳排放效率的改善。其中,技术创新水平和技术应用水平在数字普惠金融对能源碳排放效率的影响过程中起到显著的中介作用,并且经过一系列稳健性检验后,该结果仍然成立。3)从控制变量看,基础设施水平对能源碳排放效率起到显著的抑制作用,而对外开放水平和经济城镇化水平起到显著的促进作用。研究结果可为制定国家数字金融相关政策,建立“碳达峰和碳中和”发展战略的金融支持体系提供参考。

摘要：将人体运动产生的动能转化为可利用的电能为传感器供电一直是能量采研究中的一个热点.如何有效利用人体运动,增强环境适应能力以及提高能量采集性能仍是俘能研究中需要解决的关键问题.论文基于人体运动特性,设计了一种新型的混合式能量采集器,同时具有压电和电磁转化机制.压电俘能是基于压电梁变形产生电能,电磁发电机采用堆叠磁组构型来切割线圈产生电动势.首先建立了混合式能量采集器的动力学理论模型,用来描述输出电压特性,并与实验进行了对比验证.理论与实验研究均表明,混合式俘能器的输出电压在一定激励频率范围内出现两个波峰.通过调节压电梁长度,可以改变峰值大小以及两个峰值间的频段范围.人体运动实验表明,混合式俘能器中可以在短时间内提供较高的电压输出,比如当跑步速度为5 km/h时,3 s内就可以输出1.1 V直流电压驱动传感器工作;跑步时长为30 s时,传感器正常工作时常可以达到77 s.论文设计的混合式俘能器不仅可以快速供电,还具有较强的续航能力,这为电池充电或传感器供电提供了潜在的应用价值.

摘要：针对某煤矿综采工作面采煤机在作业过程中产生的高浓度粉尘问题,设计并优化了采煤机喷雾降尘装置。通过理论分析和现场测试,提出了一种基于内外喷雾结合的多角度、多方向螺旋喷嘴布置方案,有效提升了降尘效果。现场测试结果表明,优化后的装置显著降低了粉尘浓度。相比优化前,全尘浓度和呼吸性粉尘浓度分别降低了72.1%和86.3%,尤其在粉尘高浓度区域表现尤为突出。优化后的喷雾降尘装置不仅改善了作业环境,提升了工人的健康与安全,还显著减少了水资源的消耗,展现出良好的经济效益和广阔的应用前景。

摘要：高维多目标进化算法在解决复杂帕累托前沿问题时,常面临收敛性和多样性难以平衡的问题.为解决这一问题,提出了一种基于镜像判断和改进父代选择的高维多目标进化算法.该算法首次结合成就标量函数和全局密度并应用在交配池中,使其在迭代过程中不仅关注当前最优解,还兼顾解在整个空间的分布情况,从而实现了收敛性和多样性的统一.此外,针对算法在迭代过程中可能出现镜像的问题,本文提出了解决方案.具体来说,算法首先采用非支配排序,将临界层个体与参考向量相关联,随后判断其是否满足镜像对称准则,若满足则通过全局密度选取个体,达成“内紧外松”的目的,最大限度保证候选解的分布性,从而有效解决了选择压力不均的问题.最后将本文算法与最新的五种多目标算法在4种不同维度的测试问题上进行对比实验,并应用在两个实际案例中.实验结果表明:所提算法不仅能高效解决高维多目标优化问题,且能有效平衡收敛性和多样性.

摘要：本文设计了一种以STM32L051为核心的新型电梯钢丝绳张力检测设备,包括整体结构、硬件结构和系统软件设计,该设备采用型号为LZ-WS6的S型传感器作为水平拉动钢丝绳时拉力传感器,同时将HX711模数转换芯片用于钢丝绳张力检测模块。该钢丝绳张力检测设备结构简单,操作便捷,能自动判断钢丝绳张力值是否符合要求,提高了电梯生产单位和检验检测单位对钢丝绳张力的检验检测效率。

摘要：The concept of organization decision support system （ODSS） is defined according to practical applications and novel understanding. And a framework for ODSS is designed. The framework has three components： infrastructure, decision-making process and decision execution process. Infrastructure is responsible to transfer data and information. Decision-making process is the ODSS＇s soul to support decision-making. Decision execution process is to evaluate and execute decision results derived from decision-making process. The framework presents a kind of logic architecture. An example is given to verify and analyze the framework. The analysis shows that the framework has practical values, and has also reference values for understanding ODSS and for theoretical studies.

摘要：装配式数据中心项目具有预制构件数量种类多、机电系统复杂的特点,这给项目的施工与管理提出了更高要求。文章以BIM技术在某装配式数据中心项目的各实施阶段综合应用为例,介绍了BIM模型建立、碰撞检查、深化设计、模拟推演、云端联动等技术的应用情况。项目实践表明,综合应用BIM技术可以提前发现并解决图纸、施工部署、施工方案中出现的各类问题,通过进行合理优化避免改拆浪费,从而带来质量与工期效益。

摘要：在篦齿封严装置减振的开口阻尼环设计方法的基础上,对比研究了阻尼套筒的设计方法.采用动柔度法求解了安装有阻尼套筒的篦齿封严装置的动力响应.分析了阻尼套筒结构尺寸(厚度、接触面积)和安装过盈量等参数对篦齿封严装置动力响应的影响规律;在篦齿封严装置和阻尼套筒的组合结构中,存在最佳的阻尼套筒结构参数,此时阻尼套筒减振效果最佳;对组合结构不同的周波型振动,阻尼套筒的减振效果不同.