投资驱动全要素碳生产率跨区域协同改进机理——京津冀碳达峰不同情景下的模拟分析

为研究投资驱动下跨区域协同碳达峰的内在机理,分别在经济关联、能源关联和碳排放关联下分析全要素碳生产率改进的系统动力学机理,并通过差异化的空间关联模拟分析京津冀碳达峰情景条件,研究得到:空间关联方式对京津冀全要素碳生产率协同改进效应的发挥产生显著影响;对全要素碳生产率的分解分析表明,技术进步和效率改进是推动碳排放提前达峰的动力来源。优化情景下,京津冀全要素碳生产率协同改进推动碳达峰的显著变量和主要动力呈现阶段化差异特征:2020—2023年,经济影响力系数为显著变量,固定投资驱动跨区域优势产业发挥带动效应,主要以效率改进的方式摒弃无序低效模式,压缩碳排放冗余空间;2023—2028年,显著变量则转换为碳排放影响力系数,减排投资倒逼跨区域高碳产业加快减排技术创新,并借助空间溢出效应,进一步发掘碳减排潜力;2028—2030年,显著变量则调整为经济感应度系数,固定投资强化跨区域产业链联动效应,重在技术合作刺激全行业绿色转型,全面抑制碳排放。结果显示,京津冀将保持年均约6%的经济增速平稳发展,预计2028年提前实现碳达峰,有效助力碳中和。

环境友好型船舶涂料研究进展

概述了环境友好型船舶防腐涂料和防污涂料的研究进展,重点介绍了水性车间底漆、水性内舱涂料、高固体分/无溶剂通用环氧底漆、水性防污涂料、生物降解防污涂料以及低表面能涂料,并展望了船舶涂料企业的未来发展方向。

Effect of Tension on Friction Coefficient Between Lining and Wire Rope with Low Speed Sliding

In order to obtain the exact friction coefficient between lining and wire rope, the tension of wire rope is studied as a factor which affects this coefficient. A mechanical model of a wire rope subjected to axial load was established to determine the torque of the wire rope. The contact motion between lining and wire rope was regarded as a screw rotation and the axial force of the lining resulting from the torque of the wire rope was analyzed. Theoretical formulas relating tension of the wire rope and the friction coefficient was obtained. Experiments between lining and wire rope with low sliding speed were carried out with friction tester made by us. Experimental results show that increment of the friction coefficient is proportional to that of the tension of the wire rope with a low sliding speed. The experimental results agree with the theoretical calculation; the errors are less than 6%, which oroves the validity of the theoretical model.

Theoretical analysis of thermoviscoelastic contact between friction lining and wire rope in mine friction hoists

Serious accidents of mine hoists caused by high-speed sliding between friction lining and wire rope are often seen in coal mines.In order to solve this problem,we analyzed the contact characteristics between friction lining and wire rope.Then we carried out a dynamic mechanical analysis(DMA) to explain the change in mechanical properties of the friction lining as function of temperature and load frequency and found that temperature has a stronger effect on the mechanical properties than the frequency.We used multiple regression analysis to obtain the thermoviscoelastic constitutive relations of the friction lining.As well we derived the analytic solution for the thermoviscoelastic contact radius and pressure by combining the theory of viscoelastic contact mechanics with thermoviscoelastic constitutive relations.

超高压液压密封试验系统研究

该文基于增压加载和柔性连接驱动技术,并分别采用定量泵和变量泵实施高压小流量增压加载和低压大流量柔性驱动,研制了超高压液压密封试验系统,提出了针对该超高压密封试验系统的相关参数匹配计算方法,分析了试验系统基本工作原理。所提出的试验技术对解决流体传动中高达数百兆帕超高压密封试验问题具有积极意义。

液压缸微内漏检测试验台设计

该文利用液压油的可压缩特性,采用高精度手动补偿计量方式,将低压大流量变量泵和高压小流量定量泵有机结合,设计了液压缸微内漏检测试验台,给出了手动计量装置的关键参数计算方法。这对生产厂家检测液压缸的密封性能,特别是对液压缸微小内漏量的检测有积极意义。

低膜厚船舶防污涂料的制备与性能研究

研究开发了一种适用于中小型船舶的低膜厚防污涂料,采用以氧化亚铜为主防污剂的含铜防污体系(铜离子渗出率符合相关标准要求),搭配具有优异环境友好性能的新型有机防污剂进行复配作为涂料防污剂体系。采用新型丙烯酸树脂作为成膜树脂,以松香和新型丙烯酸树脂搭配其他颜填料制备防污涂料,测试结果表明其物理性能良好。在厦门海域进行实海挂板试验,在60μm膜厚的情况下,防污涂料具备1 a的防污期效,可以满足中小型船舶的实际使用需求,具有较好应用前景。

全液晶汽车仪表自动测试方法研究及应用

随着汽车行业的发展,全液晶汽车仪表应用越来越广泛,但由于其显示内容丰富,图形界面复杂,利用传统人工测试耗时长,测试结果依赖人员的主观判断,精度难以保证。为确保全液晶仪表显示的正确性和稳定性,本文提出了一种全液晶汽车仪表自动测试方法,利用OpenCV和CANalyzer搭建了一套液晶仪表自动测试系统,对全液晶仪表进行指针精度测试和警告灯测试,该测试方法检测指针偏转精度约为1.92°,警告灯点灯和熄灯异常检出率约为97.7%。此方法比人眼观察更为准确,精度更高,同时减少了测试人员的工作量,降低了仪表的开发成本,通用性强。

贵州省民族研究院60年学术活动与民族学学科建设

在贵州省民族研究院建院60周年之际,对翁家烈、陈国安、王正贤、黄才贵、李平凡、颜勇6位专家学者进行了访谈;翁家烈、陈国安、王正贤、黄才贵4位学者分别对自己的学术生涯进行了介绍和总结;李平凡和颜勇两位专家,分别对贵州省民族研究院的科研道路进行了回顾和展望。