检索结果-南通市图书馆

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

铁路混凝土梁配件多层防腐厚度测量方法探讨

金属制品 2024年第2期50卷 40-43页

作者：王军尹亚豪房文静王禾佳苏建锋国家金属制品质量检验检测中心河南郑州450001

针对高速铁路混凝土梁配件的多层防腐涂层厚度检测技术问题,探讨磁性法、显微镜法、扫描电镜法等方法对金属制件多元合金共渗+锌铬涂层+封闭层处理的三级防腐涂层厚度的检测分析能力。结果表明:磁性法检测金属制件多元合金共渗渗层具有... 详细信息

针对高速铁路混凝土梁配件的多层防腐涂层厚度检测技术问题,探讨磁性法、显微镜法、扫描电镜法等方法对金属制件多元合金共渗+锌铬涂层+封闭层处理的三级防腐涂层厚度的检测分析能力。结果表明:磁性法检测金属制件多元合金共渗渗层具有操作简单快捷的优点,但局限性较大,在考虑检测精度的情况下建议采用其他检测方法;显微镜法检测多元合金共渗渗层厚度时制样困难且检测效率较低,不适合作为多元合金共渗渗层厚度检测方法;扫描电镜法检测多元合金共渗渗层厚度时精度高、重复性好,通过能谱仪的元素面扫描可识别不同类型的防腐层,因此是一种作为金属制件防腐涂层型式检验和仲裁检验的适宜方法。

关键词：高速铁路防腐涂层混凝土梁多元合金共渗磁性法

Seismic response and correlation analysis of a pile-supported wharf to near-fault pulse-like ground motions

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2024年第4期23卷 883-897页

作者： Wang jianfeng su Lei Xie Libo Ling Xianzhang Ju Peng School of Civil Engineering Qingdao University of TechnologyQingdao 266500China School of Civil Engineering Harbin Institute of TechnologyHarbin 150006China No.2 Engineering Company Ltd.of CCCC First Harbor Engineering Company Ltd Qingdao 266071China

Earthquake investigations have shown that near-fault pulse-like(NF-P)ground motions have unique characteristics compared to near-fault non-pulse-like(NF-NP)and far-field(FF)ground *** is necessary to study the seismic response of pile-supported wharf(PSW)structures under NF-P ground *** this study,a three-dimensional finite element numerical model is created to simulate a *** imparting three types of ground motion,the engineering demand parameters(EDPs)of PSW under NF-P ground motions were analyzed and compared,in which EDPs are the maximum displacement and bending moment of the *** intensity measures(IMs)were selected to characterize the properties of ground *** correlation between IMs and EDPs was *** results show that the piles present larger displacement and bending moment under NF-P ground motions compared to NF-NP and FF ground *** of the IMs have a high correlation with EDPs under NF-P ground motions,and these IMs are more applicable to FF ground *** correlation coefficients between EDPs and IMs under three types of ground motion were obtained,which will provide a valuable reference for the seismic design of PSWs.

关键词： pile-supported wharf correlation analysis near-fault pulse-like ground motion intensity measure seismic response

Synthesize of ZnO Nanorods on Quartz substrates with Seed Layer via Hydrothermal Method: Influence of Solution Concentration

在线全文

学校读者我要写书评

暂无评论

Materials Sciences and Applications 2022年第12期13卷 587-594页

作者： Qiang Niu Rongjie Xue jianfeng su Ruirui sun Haofeng Yan Hengyuan Zhang Department of Mathematics and Physics Luoyang Institute of Science and Technology Luoyang China

Vertically oriented ZnO nanorods have been synthesized by hydrothermal method on quartz substrates with a seed layer. The influence of solution concentration on the morphology, structural and optical properties was analyzed. Results indicated that with the increase of solution concentration, the diameter and uniformity of ZnO nanorods increased. And the preferred orientation is obviously which shows better crystal quality. Typically, when the solution concentration is 0.03 mol/L, the nanorods exhibit a stronger UV emission peak located around 380 nm. In the visible region, all synthesized samples demonstrate more than 80% of optical transparency.

关键词： Hydrothermal Method ZnO Nanorods Solution Concentration

PID Control of Iodine Molecules Containing Gas Generator Based on Differential Evolution Algorithm

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

PID Control of Iodine Molecules Containing Gas Generator Bas...

Optimizing LADRC Bubble Tower Control System Based on Differential Evolution Algorithm

第32届中国控制与决策会议

作者： Lihua Wang jianfeng su Liyuxin Chen Dongxiang Zhang School of Chemistry and Chemical Engineering Beijing Institute of Technology

In this paper,a simple design method of iodine molecules containing gas generator is *** the mathematical model of the system is derived and the transfer function of the system is obtained by step response ***,a method of optimizing PID controller parameters in real time using a differential evolution algorithm is proposed,which solves the problem that the existing PID controller parameter tuning methods are complicated and take a lot of ***,the different control schemes are compared in simulation,and the results show that the control algorithm proposed in this paper has better performance even if there is external interference.

关键词： Gas Generator Iodine PID Control Differential Evolution Algorithm Real Time

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Optimizing LADRC Bubble Tower Control System Based on Differ...

Single Adatom Adsorption and Diffusion on Fe surfaces

第32届中国控制与决策会议

作者： jianfeng su Lihua Wang Liyuxin Chen Dongxiang Zhang School of Chemistry and Chemical Engineering Beijing Institute of Technology

The linear active disturbance rejection controller（LADRC） does not rely on models and has strong robustness,which makes it widely used in engineering *** the chemical process,the internal mechanism of the bubble column reactor is *** is difficult to model,has many interferences and is impossible to measure,so the control effect of LADRC has huge application *** order to solve the problem that the parameters of LADRC are not conducive to tune,this paper proposes a method for tuning LADRC parameters based on differential evolution *** simulation results show that the control system has good robustness,can effectively suppress the effects of model uncertainty and external uncertain disturbances,and has good control effect in the removal of iodine process in acid environment in the bubble column.

关键词： Bubble tower LADRC Extended state observer Differential evolution algorithm

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Modern Physics 2011年第9期2卷 1067-1072页

作者： Changqing Wang Dahu Chang Chunjuan Tang jianfeng su Yongsheng Zhang Yu Jia 不详

Using Embedded-atom-method (EAM) potential, we have performed in detail molecular dynamics studies on a Fe adatom adsorption and diffusion dynamics on three low miller index surfaces, Fe (110), Fe (001), and Fe (111). Our results present that adatom adsorption energies and diffusion barriers on these surfaces have similar monotonic trend: adsorption energies, Ea(110) Ea(001) Ea(111), diffusion barriers, Ed(110) Ed(001) Ed(111). On the Fe (110) surface, adatom simple jump is the main diffusion mechanism with relatively low energy barrier;nevertheless, adatoms exchange with surface atoms play a dominant role in surface diffusion on the Fe (001).

关键词： EAM Potential Molecular Dynamics Diffusion Nudged Elastic Band (NEB) Method Iron Adsorption

基于FLAC^(3D)的土层非线性地震反应分析

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

地震工程学报 2017年第5期39卷 883-889页

作者：苏建锋中国地震局第一监测中心天津300180

以唐山响嘡局部场地影响台阵3号测井场地(Ⅱ类场地)作为实验场地,验证用FLAC^(3D)软件方法进行土层地震反应计算的可行性。以天津塘沽某IV类场地为例,在不同地震动强度输入条件下分别采用FLAC^(3D)软件方法和等效线性化程序方法计算该... 详细信息

以唐山响嘡局部场地影响台阵3号测井场地(Ⅱ类场地)作为实验场地,验证用FLAC^(3D)软件方法进行土层地震反应计算的可行性。以天津塘沽某IV类场地为例,在不同地震动强度输入条件下分别采用FLAC^(3D)软件方法和等效线性化程序方法计算该场地地表地震动峰值和反应谱。计算结果表明:在输入地震动强度较小时,两种方法计算得到的结果差别不大;在输入地震动强度较大时,FLAC^(3D)方法克服了等效线性化方法低估地表地震反应(高频部分)和高估土体的非线性所造成的地表反应谱特征周期偏大问题。FLAC^(3D)方法计算得到的结果可能更符合工程实际。

关键词： FLAC3U 土层地震反应分析等效线性化 IV类场地

在线全文

学校读者我要写书评

暂无评论

澳门判例史研究

法律适用 2017年第16期 63-68页

作者：苏建峰澳门大学法学院

在澳门《司法组织纲要法》中规定的"统一司法见解"是一种判例。判例这个法律术语有着悠久的历史,在葡萄牙最早可追溯至十六世纪葡萄牙国王曼努埃一世所颁布的《许可令》中以强制力的司法见解出现。自此判例就一直被采用。到了1822年,由... 详细信息

在澳门《司法组织纲要法》中规定的"统一司法见解"是一种判例。判例这个法律术语有着悠久的历史,在葡萄牙最早可追溯至十六世纪葡萄牙国王曼努埃一世所颁布的《许可令》中以强制力的司法见解出现。自此判例就一直被采用。到了1822年,由于首部葡萄牙宪法的规定,判例一词在其后一段长时间内消失于葡萄牙法当中,这样,直到1927年判例才重新被采用。1966年《葡萄牙民法典》第2条进一步确立了判例具普遍的约束力,但没想到的是,这个规定却导致了判例的没落。随着1967年《葡萄牙共和国宪法》的生效,具普遍约束力的判例受到是否违宪的质疑,并最终在1993年被宪法法院裁定违宪。自此,判例这个术语便不再在葡萄牙法中被使用。作为解决方法,葡萄牙法把这个重任交给《民事诉讼法典》中的"统一司法见解"制度。澳门现行诉讼法中的相关规定也是以葡萄牙这个制度为蓝本作出。

关键词：判例统一司法见解葡萄牙法对上诉之扩大审判违宪

The Application of GNSS to Fault Deformation Studies

在线全文

学校读者我要写书评

暂无评论

Earthquake Research in China 2014年第4期28卷 510-519页

作者： Bo Wanju Feng Shengtao su jianfeng Zhou Haitao Du Xuesong Wan Wenni Liu Tianhai The First Crustal Deformation Monitoring and Application Center CEA National Earthquake Response support Service

Great earthquakes often occur along or near active fault belts. Thus,monitoring and research on fault deformation are quite important. Methods such as short-leveling,shortbaseline and integrated monitoring profile across fault belts have been used to monitor fault activities for many years. GNSS observations are mainly used to obtain the horizontal velocity field in large areas and to study the activities and deformation of major *** technology has been used to monitor and study the deformation of faults from a different aspects. In this paper,some applications and new explorations of GNSS are discussed. They are:( 1) Research and monitoring of strike-slip activities of faults with GNSS.( 2) Research and monitoring of vertical activities of faults with GNSS.( 3)Investigating the laws of deformation of blocks on the sides of fault zone and setting up strain models to deduce the activities and deformation of faults with respective models and compare the deduced results with the actual measurements across fault. It is concluded that a larger discrepancy between the deduced and the observed deformation indicates a stronger interaction between the blocks,which can be important for predicting the location of a strong earthquake and assessing seismic hazard,as well as the seismicity trend.

关键词： GNSS Fault deformation Baseline Leveling Seismicity Crust block