基于公共存储器进行数据交换的高速数字图象处理系统

本文介绍了一种基于公共存储器进行数据交换的高速数字图象处理系统．给出了公共存储器的设计，描述了处理器对公共存储器的进程同步控制．     

Effect of Deep Cryogenic Treatment on Wear and Corrosion Resistance of an Al–Zn–Mg–Cu Alloy

Russian Journal of Non-Ferrous Metals - The 7075 aluminum alloy was subjected to deep cryogenic treatment (DCT) at –196°C with liquid nitrogen for different hours. The wear and corrosion...     

经济结构不对称与重新城市化——以上海市为例

本文以上海为研究对象，分析了上海作为一个特大型城市所存在的产业结构与劳动力就业结构不对称的现象及其成因，认为这种现象是由传统的经济发展思路造成的。要改变现状，就必须改变经济发展的思路，变注重产业发展为注重城市区域经济的整体发展，而重新城市化是落实新发展思路，从而矫正经济结构的不对称的具体途径。文章最后认为从五个方面来看上海已经具备了重新城市化的条件，并且简要论述了上海重新城市化的前景。     

某大厦集中空调系统节能运行探讨

总结了该大厦集中空调系统所采取的管理节电措施,介绍了采用的节能改造技术。     

Special electrochemical behaviour of sodium thiazolinyl-dithiopropane sulphonate during microvia filling

In this work, galvanostatic measurements were employed to study the electrochemical behaviour of thiazolinyl-dithiopropane sulphonate (SH110) in a copper plating process, which indicated that it had a critical concentration of 12.5?mg?L^?1. At this critical concentration, it would accelerate copper deposition at strong forced convection but inhibit copper deposition at weak forced convection. To get more insight into SH110, its potential decomposition products, 3-mercapto-1-propanesulphonate (MPS) and 2-thiazoline-2-thiol (H1), were also investigated. It was found that MPS always presented an acceleration effect with its concentration increasing, whereas H1, with a simple molecular structure, also had a critical concentration, which was 1.25?mg?L^?1. As expected, superfilling can be achieved by using H1 as the single additive. Finally, the interaction between SH110 and H1 was studied to prove the decomposition of SH110, as well as to illustrate its action mechanism.     

构建西安老城区绿色交通体系

西安老城区--明城墙区处于城市的中心位置,是城市交通最为拥堵的区域。如何处理好保护与交通可持续发展的关系、充分发掘历史街区的魅力,在保证原有历史街区内部尺度的同时、建设富有西安文化特色的绿色交通体系是本文要讨论的内容。     

真空绝热管道的传热计算

分析了低真空、中真空、高真空下空气的热传导,对低真空复合保温蒸汽管道、高真空保冷液化天然气管道的传热进行了计算。     

Highly Dispersed NiO Clusters Induced Electron Delocalization of Ni?N?C Catalysts for Enhanced CO2 Electroreduction

Oxygen-regulated Ni-based single-atom catalysts (SACs) show great potential in accelerating the kinetics of electrocatalytic CO₂ reduction reaction (CO₂RR). However, it remains a challenge to precisely control the coordination environment of Ni O moieties and achieve high activity at high overpotentials. Herein, a facile carbonization coupled oxidation strategy is developed to mass produce NiO clusters-decorated Ni N C SACs that exhibit a high Faradaic efficiency of CO (maximum of 96.5%) over a wide potential range (−0.9 to −1.3 V versus reversible hydrogen electrode) and a high turnover frequency for CO production of 10 120 h⁻¹ even at the high overpotential of 1.19 V. Density functional theory calculations reveal that the highly dispersed NiO clusters induce electron delocalization of active sites and reduce the energy barriers for *COOH intermediates formation from CO₂, leading to an enhanced reaction kinetics for CO production. This study opens a new universal pathway for the construction of oxygen-regulated metal-based SACs for various catalytic applications.     

基于滑模控制的永磁同步电机直接转矩控制研究

针对永磁同步电机直接转矩控制(DTC)存在较大的电磁转矩脉动、磁链脉动、低速性能不理想等问题,文中引入滑模控制策略对永磁同步电机进行直接转矩控制。通过建立PMSM的矢量数学模型,设计基于滑模控制的直接转矩控制器,利用MATLAB/Simulink进行建模仿真分析。结果表明,与传统DTC相比,基于滑模控制策略的永磁同步电机直接转矩控制系统中电磁转矩脉动幅值更低,且具有更好的动态性能和抗扰动能力,可以更加有效地改善系统特性,满足实际电机控制的需要。