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：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：阐述高速SERDES接口芯片BLK2711的应用,BLK2711的特性及工作原理,针对高速收发器BLK2711的应用及验证设计原理样机,进行仿真验证及分析,实现传输速率为2Gbps的高速数据收发,为其在高速数传中的应用提供技术基础。

摘要：整车开发项目中,前期车辆碰撞安全策略的开发至关重要,因为其奠定了后续整车结构性能开发的关键内容。文章正是基于这一出发点,结合工作实践总结出一种项目前期车辆正碰结构安全策略开发的研究方法。主要是通过对正碰路径主要结构性能的分析和简易量化计算,快速设计和确定平台车身碰撞关重件相关的空间布置、碰撞过程能量吸收、纵梁截面形状和尺寸等内容,为后续车型碰撞安全的开发打下坚实的平台基础,并保证项目进度能够得到有效执行。

摘要：系统阐述了增程式混合动力系统匹配的基本方法,并结合整车实际运行工况对增程器的工作模式、运行条件进行了初设计,解决了项目初期系统选型输入需求的生成与提出问题,为整车、系统设计乃至整车系统控制策略的开发确立了基础。借助***/Simulink软件对所匹配的系统进行了验证,达到了预期效果,表明这种系统匹配的方法是可行和有效的。

摘要：以具有大的表面积及特殊的中空结构的碳纳米管（CNT）作为气敏传感器敏感层材料为基础,介绍了CNT在开发不同类型气敏传感器技术方面的最新进展。综述了CNT及以贵金属、金属氧化物、聚合物改性的CNT作为气敏传感器材料的研究现状,并以气敏传感器的灵敏度和响应速度为标准,对比了CNT与三种CNT复合材料作为气敏传感器敏感层的优缺点。总结了每种传感器的设计方法、制作工艺和传感机理,提出了CNT气敏传感器当前面临的技术挑战,并对以后CNT作为气敏传感器材料的发展进行展望。

摘要：为研究川藏铁路隧道长度对动车组通过隧道时压力波的影响,采用一维可压缩非定常不等熵流动模型和广义黎曼变量特征线法,对列车在上坡或下坡隧道内运行时车外压力波进行数值计算,得到列车通过不同长度隧道时头尾车压力波特性。详细分析隧道长度对列车通过隧道时头尾车压力波峰值的影响规律。结果表明,列车上坡通过隧道时,隧道长度超过1km后头车最大正压值基本保持不变,隧道长度对尾车最大正压值影响较小;头尾车最大负压幅值和最大压力峰峰值随隧道长度增加而增大,且隧道长度超过4 km后呈线性增大趋势;列车下坡通过隧道时,头尾车最大正压值和最大压力峰峰值基本随隧道长度的增加而增大,且隧道长度超过4km后呈线性增大趋势;头尾车最大负压幅值随隧道长度增加先增大后减小,隧道长度超过20 km后,头尾车最大负压值基本保持不变。研究结果可为川藏铁路动车组气密性及乘客压力舒适度设计提供参考。

摘要：海洋拖缆勘探中,鬼波是限制地震资料频带宽度进而影响地震资料品质的一个重要因素,震源沉放深度及电缆沉放深度会直接影响鬼波陷波点位置,从而直接改变整个地震资料原始频谱。随着海洋地震宽频采集多年来的发展,发展出了诸如直斜缆采集、抛物型斜缆采集、“犁式”斜缆采集等多种变深度缆采集方式。为了进一步研究在采集中消除鬼波的定量化设计方法,本文从传统鬼波去除机理入手分析,提出使用多道叠加的方式在采集端进一步压制鬼波,通过理论公式推导出了影响多道叠加响应的关键参数,最终,通过最不相关准则,给出满足目标勘探区的缆型设计结果。本方法适用于各种水深地区,可根据多个目的层进行设计并拟合出最优缆型,实际采集资料宽频处理效果,验证了面向目标宽频采集的海上缆型设计方法的可靠性。

摘要：本文将PSA模型分析应用于电站运行管理工作梳理中,提出了基于PSA风险见解的风险薄弱项查找方法与管理优化流程,并且在“华龙一号”运行机组上进行应用实践,提出并实施“应急硼注入系统管理优化”,“附加柴油机接入方式优化”两项重要的管理与设计优化,研究表明,实施变更后机组功率运行内部事件一级PSA堆芯损伤频率降低约10%。本方法对于核电机组的PSA见解应用与运行安全提升,具有重要现实意义与推广价值。

摘要：钱江隧道是目前世界上最大直径的软土盾构隧道工程之一。采用有限元分析方法,对盾构掘进与管片拼装阶段中常见的K块挤入、壁后注浆缺陷、环面不平整、盾构纠偏或曲线推进等不利工况,分析隧道结构的受力和变形特征。结果表明:K块挤入对邻接块的受力状态的影响最为明显,K块宜位于衬砌环腰线以上区域。环面不平整、壁后注浆缺陷和盾构纠偏(或曲线推进)将显著影响盾构推进阶段的衬砌的受力和变形。当环面不平整超过1 mm时,壁后注浆缺陷超过1 m2,或盾构纠偏顶部推力最大时,极易造成管片结构局部开裂、破损。在今后的设计和施工控制中应予以充分考虑。