摘要：It is a great challenge to develop highly active oxygen evolution reaction(OER)electrocatalysts with superior *** this study,a NiFe layered double hydroxidedecorated phosphide(NiFe LDH@CoP/NiP_(3))was constructed to display satisfactory OER activity and good stability for water splitting in alkaline *** an overpotential of 300 mV,NiFe LDH@CoP/NiP_(3) achieved a current density of 82 mA cm^(-2) for the OER,which was 9.1 and 2.3 times that of CoP/NiP_(3) and NiFe LDH,***,the reconstruction behavior,during which oxyhydroxides formed,was studied by a combination of X-ray photoelectron spectroscopy,Raman spectroscopy,and scanning electron microscopy.A synergistic effect between NiFe LDH and CoP/NiP_(3) was also observed for the hydrogen evolution ***,when NiFe LDH@CoP/NiP_(3) acted as both the cathode and anode for overall water splitting,a high current density of 100 mA cm^(-2) was maintained for more than 275 *** addition,under Xe light irradiation,a solar-to-hydrogen efficiency of 9.89% was achieved for solar-driven water *** work presents the coupling of different active compositions,and can provide a reference for designing bifunctional electrocatalysts.

摘要：荆州市邮电局“九七工程”系统平台方案设计（三）彭宏程李子春（湖北省邮电科学研究所４３００１０）收稿日期：１９９７０７１０四、数据库管理系统［１８］数据库管理系统是ＭＩＳ系统的核心，其技术的先进性、开放性、可靠性、安全性占有举足轻重的地位。作为独立...

摘要：Marine in situ testing is a necessary step for stereotyping newly developed marine sensors. The use of test sites in the Yangtze Estuary area, which has high turbidity and abundant nutrients, can effectively reduce the needed testing time owing to its harsh conditions. Five test stations were established, and a floating buoy and fixed test equipment were designed. A control system, including a sensor connection, data processor, video remote transmission, and corresponding control algorithm, was developed. The control system enabled the nondestructive monitoring of biological attachments and bidirectional, real-time communication between an upper server on land and the control system at the test sites. The dissolved oxygen(DO), temperature, and pH data of DOS600 and DPS600 sensors were compared with those of AP2000 sensors. Temperature recording using the DOS600 sensor was performed nearly as well as that of the AP2000 sensor. The mean DO values(standard deviations) were 8.414 mg L-1(2.068) and 6.896 mg L-1(1.235) for the DOS600 and AP2000 sensors, respectively, indicating that the DOS600 performance was unsatisfactory. The pH recording of the DPS600 was slightly worse than that of the AP2000 sensor. Experimental results showed that the DO value was more easily affected by the buoy movement of waves compared to the pH and temperature. Moreover, data fluctuations showed that the DO and pH parameters were more vulnerable to biofouling than temperature. Waves and biofouling create a harsh test environment, and the performance difference between the developed sensors and a standard sensor can be obtained in a short time period.

摘要：本文介绍了水力机械轴对称有势流动的表达式，然后，根据颗粒在水力机械中的运动轨迹，探讨了稀疏颗粒对轴面流场的影响，并计算了流场。

摘要：苏州中级法院审判业务大楼地上7层,底部裙房为方形平面且中庭开大洞,上部塔楼为偏置的L形平面,南侧及东侧底部存在12根跨3层的穿层柱,造成结构平面及竖向均不规则,使结构超限。结构设计根据平面和竖向特点,采取三个区域剪力墙筒布置的框架-剪力墙结构体系,保证了一定抗扭刚度。采用SATWE和MIDAS Building软件建立了两个不同的模型进行了多遇地震下的弹性反应谱分析以及弹性时程分析,并将两种方法的结果进行对比。采用静力推覆法Pushover进行大震下结构静力弹塑性分析,还进行了穿层柱地震剪力和屈曲稳定分析。结果表明各项指标满足规范要求,采取的措施可行、有效,此结构方案具有较好的抗震承载能力。

摘要：近年来,框架-剪力墙结构作为一种双重抗侧力体系,得到了越来越广泛的应用。基于国内对框架-剪力墙结构双重抗侧力体系的研究,总结了框架-剪力墙结构在框架倾覆力矩的计算、框架二道防线剪力调整及大震弹塑性性能等方面的成果,指出:“改进轴力法”及“统一解方法”可以较为准确地计算底部框架承担的倾覆力矩;刚度特征值是影响框架层剪力分配的重要指标,框架层剪力调整时框架梁内力可不做调整;现有的大震弹塑性方面的分析结果并不一致,需统一性能指标并加强试验研究。展望了该结构体系有待进一步研究的问题,包括底部框架倾覆力矩的比例界限问题、框架层剪力的实用调整方法,以及新型单重抗侧力体系的研究等。

摘要：针对摇摆条件下稳压器喷淋冷凝过程开展了数值研究,建立运动条件下附加作用力模型,并添加到两相流控制方程源项中实现稳压器摇摆运动的模拟。采用MIXTURE模型计算汽-液两相间的相互作用,分析了喷淋冷凝过程中不同摇摆周期和摇摆角度下稳压器内部的相分布和压力瞬态变化特性。结果发现,喷淋冷凝过程能够有效减弱摇摆条件下的汽-液界面的流动失稳现象;同时发现摇摆角度越大,稳压器内压力随时间的周期性波动越大,喷淋冷凝过程能够减弱压力随着时间的周期性波动。

摘要：自然通风是1项重要的被动式建筑节能技术措施,但在前期设计阶段,现有的建筑自然通风多是依赖于建筑师的经验设计,缺乏简易、精准和量化的评估方法。本文提出了1种基于风压频率统计的居住建筑自然通风潜力综合评价方法,并以长沙地区典型住宅为例,对不同平面形态、户型和层数等设计参数下的建筑自然通风性能进行了模拟计算和对比分析。经过验证,本文提出的方法能定量且准确反映居住建筑的自然通风潜力。结果表明,居住建筑自然通风潜力受到建筑平面户型布局、建筑形态、高度和相邻建筑的影响,也受到建筑群排布的影响。

摘要：根据海洋仪器试验场建设需要,对传感器等海洋仪器进行检测的装置立管及其附属结构进行设计与分析十分必要。检测装置由不同直径的PE立管相互嵌套为主体,可搭载5个直径50 mm的传感器,传感器挂载装置可自动适应海上潮位变化,螺旋桨旋转形成涡流以清除附着生物。CFD圆柱绕流仿真计算以及对装备固定螺栓组和卡箍失效分析结果表明,消波管可引导装备立管绕流及尾流的汇流,控制尾流的流向,削弱流体流经立管时产生的涡流影响,并且装置在海上作业具有较高的抗风浪性和可靠性。在上海市浦东芦潮港水文检测站进行的测试表明,装置整体结构强度和形变符合设计要求,能够满足海洋仪器试验场测试装备的需要。

摘要：2019年以来,根据三部委联合印发的《城镇污水处理提质增效三年行动方案(2019-2021年)》文件的要求,各地持续开展城市污水处理厂的提质增效工作。从目前的实施效果来看,大湾区仍有多数污水处理厂由于管网治理不彻底、措施不完整等原因导致“一厂一策”整治效果不理想。选取佛山市镇安污水处理厂作为“一厂一策”系统化整治示例,重点分析河网密集区域污水处理厂进水浓度低、进水水量偏大的原因,提出系统治理措施,以供同类型污水处理厂提质增效工程参考。