Application effect of high-density electrical method on detecting artificial filling layer: A case study of Chengjiangshan area of Huaibei City

High-density electrical method has been proved to be an effective method for probing shallow sedimentary layers.It is principally used to identify the boundary between the Quaternary soil layer and bedrock according to the vertical change of apparent resistivity.However,the artificial filling layer has the characteristics of heterogeneity and high porosity,which makes it challenging to detect the artificial filling layer by high-density electrical method.The key to solve this problem is to detect the difference of conductivity between the filling layer and the underlying bedrock.This paper takes the land in Chengjiangshan area of Huaibei City,Anhui Province as the detection target.On the basis of fully analyzing the physical properties of the artificial filling layer,two-dimensional high-density electrical survey and inversion are used to define the thickness of the artificial filling layer.The research shows that the highdensity resistivity method has obvious advantages in delineating the distribution of bedrock and the thickness of the filling layer,and the reliability of the high-density electrical method in the detection of the artificial filling layer,and delineates the scope of the filling layer is verified by the borehole data.

Application of high-density resistivity method to evaluate safety around Minyan Tunnel,Helong City

By determining the distribution and extent of geological structures surrounding the Mingyan Tunnel,Xicheng Town,Helong City,Jilin Province,we can evaluate the stability of the rock mass and assess potential hazards during tunnel construction.We use the high-density resistivity method to analyze the subsurface structure of the study area.Conductive anomalies are likely to represent joint and fissure systems within strongly weathered host rocks,and the bedrock surrounding the tunnel is relatively stable and does not contain well-developed faults.High-density resistivity analysis can provide valuable information in the context of tunnel engineering and safety.

Viability of high-density resistivity method for evaluating mountain slope stability in Erdaojiang District,Tonghua City,China

The authors employ the high-density resistivity method to image the subsurface structure of a mountain in Erdaojiang District,Tonghua City,Jilin Province,China,to evaluate the potential risk of slope failure on surrounding residential areas and infrastructure,and identify a shallow fault that extends across the center of the mountain and is perpendicular to the mountain slope and accurately locate the spatial position and depth of another fault on the southern side of the mountain.The results provide an important basis for evaluating mountain slope stability.This study also demonstrates that the high-density resistivity method is effective for detecting mountain faults.

Determining water well sites based on electrical structure in Taobei District of Baicheng

Drilling a well randomly would lead to high uncertainties and could not meet the demand of water supply from the increasing population.It is in dire need to improve success rate of well drilling.The high-density resistivity method offers us a good choice.In this study,high-density resistivity method is used for groundwater survey in five villages in the Taobei District of Baicheng.The data obtained by high-density resistivity method is inverted through Res2dinv software.It is found that the electrical structure is characterized by a horizontal layer distribution,and the resistivity shows a"high-medium low-low"feature from shallow to deep.Moreover,obvious electrical gradient zones are identified in the strata below each section,which are interpreted as tectonic weak zones,i.e.,the faults.The low-resistance anomaly areas are inferred to be favorable aquifers.The results show that high-density resistivity exploration is an efficient and practical method for determining water well sites in rural areas and can provide a guide for finding water resources in the area.

Application of high-density resistivity method for assessing construction safety of Shimodong tunnel in Helong City of Jilin Province

Some unfavorable geological conditions can affect the construction of tunnels.In order to evaluate the damage degree of tunnel construction and determine the surrounding rock grade and stability of the tunnel,the authors used high-density resistivity method to detect the surrounding rocks of Shimodong tunnel in Xicheng Town of Helong City.The underground resistivity structures of the entrance,exit and middle parts of the tunnel are obtained.Through analysis,it is found that there are no bedrock faults near the tunnel,although some joints and fissures are developed in some locations,which are characterized by low-resistivity anomalies.The tunnel structures are stable overall,favorable for safe and efficient construction.The study also proves the good application effect of the high-density resistivity method in tunnel safety detection.

Application of high-density resistivity method in archaeological investigation of Sumicheng ancient city site

The authors employ the high-density resistivity method during an archaeological investigation of Sumicheng site,an ancient city of the Tang Dynasty,to find evidence of human activities and locate a favorable target for archaeological excavation in the southern part of the outer city.There are two obvious high-resistivity structures,the south wall of the inner city and an ancient building near the south gate along the outer city wall,of which the resistivities are indicative of rammed soil foundations.The south wall of the inner city is continuous but is cut off abruptly to the east,which we suggest it is due to either wall damage or destruction.The resistivity signature of the target area is verified by archaeological excavation,proving the feasibility and effectiveness of implementing the high-density resistivity method for archaeological exploration.

STEAM教育理念下电场自动测绘仪的开发

将静电场教学实践中遇到的问题,作为课外拓展课题研究是新工科人才培养的有效方式之一。本文基于STEAM教育理念,采用项目式学习,以学生为主体,以跨学科融合和创新为导向,制定教学目标和教学方法。将物理理论和实验创新有机融合,引导学生结合单片机技术和Matlab程序,设计出新型可视化电场自动测绘仪。该仪器操作简便高效,测量精度高,还能直观展示电场的动态变化。而学以致用的过程,提高了学生的创新能力和知识综合运用能力,也为高校的教学改革提供了新思路。

城市智慧排水管控中多元监测体系构建研究

城市河流与排水管网污染溯源的时效性差与监测体系空间覆盖不平衡等仍是城市水环境管理的突出问题。随着无人机、物联网、水质在线监测、高精度定位等技术的发展,实现快速污染溯源的多元监测体系正逐步实现。该研究通过对中山市濠头涌区域的排水管网关键节点与河流关键断面安装分布式检测仪表,并应用无人监测船对城市河流进行地形测量、水质监测,完成了监测体系的构建和多元监测数据的获取,实现了分布式仪表与无人监测船的优势互补。此外,基于电导率与氨氮相关性系数大于0.92的结果及氨氮作为主要污染物的现状,验证了电导率作为主要水质实时监测指标的合理性。

化工企业电气仪表自动化控制技术的运用

电气仪表自动控制系统的发展,离不开信息技术的支持,它能够为化工企业的设备装置提供技术保障,还可以带动电气仪表自动化的发展。在现代化生产作业中,研究和开发自动化技术,能够促进工业发展。特别是通过智能化自动控制技术的应用,可进一步提升电气仪表的安全运行效果、增加企业的经济效益。

核电厂安全级电气连接器的设计与试验

为实现安全级仪表信号的可靠传输,核电厂通常采用可拆卸的电气连接器连接仪表与电缆以及电缆与电缆。对电气连接器技术进行调研,设计了一种结构简单、性能可靠、操作安装方便、在地震以及严重事故下能有效吸收振动载荷、能够承受更长时间的辐照老化和热老化的安全级电气连接器。依托研制样机开展了功能性能试验和鉴定试验,试验结果表明:安全级电气连接器具有极高的可靠性,能够满足核电厂事故环境下的需求。该连接器可推广于其他恶劣环境条件下的应用领域。

Multifunctional HDPE/Cu biocidal nanocomposites for MEX additive manufactured parts: Perspectives for the defense industry

In this study, we investigated the performance improvement caused by the addition of copper(Cu)nanoparticles to high-density polyethylene(HDPE) matrix material. Composite materials, with filler percentages of 0.0, 2.0, 4.0, 6.0, 8.0, and 10.0 wt% were synthesized through the material extrusion(MEX)3D printing technique. The synthesized nanocomposite filaments were utilized for the manufacturing of specimens suitable for the experimental procedure that followed. Hence, we were able to systematically investigate their tensile, flexural, impact, and microhardness properties through various mechanical tests that were conducted according to the corresponding standards. Broadband Dielectric Spectroscopy was used to investigate the electrical/dielectric properties of the composites. Moreover, by employing means of Raman spectroscopy and thermogravimetric analysis(TGA) we were also able to further investigate their vibrational, structural, and thermal properties. Concomitantly, means of scanning electron microscopy(SEM), as well as atomic force microscopy(AFM), were used for the examination of the morphological and structural characteristics of the synthesized specimens, while energy-dispersive Xray spectroscopy(EDS) was also performed in order to receive a more detailed picture on the structural characteristics of the various synthesized composites. The corresponding nanomaterials were also assessed for their antibacterial properties regarding Staphylococcus aureus(S. aureus) and Escherichia coli(E. coli) with the assistance of a method named screening agar well diffusion. The results showed that the mechanical properties of HDPE benefited from the utilization of Cu as a filler, as they showed a notable improvement. The specimen of HDPE/Cu 4.0 wt% was the one that presented the highest levels of reinforcement in four out of the seven tested mechanical properties(for example, it exhibited a 36.7%improvement in the flexural strength, compared to the pure matrix). At the same time, the nanocomposites were efficient against the S. aureus bacterium and less efficient against the E. coli bacterium.The use of such multi-functional, robust nanocomposites in MEX 3D printing is positively impacting applications in various fields, most notably in the defense and security sectors. The latter becomes increasingly important if one takes into account that most firearms encompass various polymeric parts that require robustness and improved mechanical properties, while at the same time keeping the risk of spreading various infectious microorganisms at a bare minimum.

工业电气自动化仪器仪表控制研析

随着社会经济水平的不断提高和工业的不断发展,我国对电气自动化现代科技发展提出了更高要求,而仪器仪表控制作为电气自动化发展的重要内容,其控制水平高低直接影响电气自动化运行性能。通过对工业电气自动化仪器仪表控制中的常见技术与控制策略进行研究,进一步提高工业现场电气自动化运行的性能,以期为未来的技术发展提供参考。

基于虚拟仪器技术的船舶电场仿真与信号生成研究

水下电场半实物模拟是研究船舶水下电场特性、验证水下电场感知装置性能和特征检测算法效果的重要手段。本文围绕电场半实物模拟需求,将电场数学模型与虚拟仪器技术相结合,基于LabVIEW平台开发了一套船舶电场模拟装置,可将船舶数学模型仿真信号转化为可被物理感知的电压信号。将船舶电场等效为水平电偶极子模型,基于LabVIEW语言开发测控软件界面,底层调用偶极子电场模型动态链接库文件实现电场信号的数值计算,利用数值信号驱动24位D/A卡产生模拟电压信号,实现船舶电场信号的物理生成。经实验验证,船舶电场模拟装置可实现典型海洋环境下运动船舶电场信号的物理输出,输出信号曲线与模型计算曲线吻合,可为船舶电场测试以及相关算法验证等提供信号输入。

电气自动化仪表的管理与维护研究

介绍电气自动化仪表及其在工业自动化系统中的作用,阐述仪表资产管理的必要性,提出降低运营风险、延长仪表寿命、提高总体运作效率的维护策略。

耳穴贴压联合眼周经皮穴位电刺激在6~12岁儿童轻度近视中的应用研究

目的观察耳穴贴压联合眼周经皮穴位电刺激在6~12岁儿童轻度近视中的应用效果。方法采用随机数字表法将2022年11月—2023年4月在石家庄市某小学的132例轻度近视儿童平均分为3组,分别为耳穴贴压组、眼周经皮穴位电刺激组、联合组,每组44例。3组患儿均给予常规护理,在此基础上,耳穴贴压组给予耳穴贴压治疗,眼周经皮穴位电刺激组给予眼周经皮穴位电刺激治疗,联合组给予耳穴贴压联合眼周经皮穴位电刺激治疗。3组患儿干预疗程均为每4周1个疗程,1个疗程后暂停1周,再进行第2个疗程,共2个疗程。比较3组患儿治疗前、治疗1个疗程后、治疗2个疗程后的裸眼远视力、屈光度、调节灵敏度及眼局部症状总积分,观察其对轻度近视儿童的治疗效果。结果干预结束后,共脱落8例患儿,最终纳入124例,分别为耳穴贴压组41例,眼周经皮穴位电刺激组41例,联合组42例。3组患儿治疗前的裸眼远视力、屈光度、调节灵敏度及眼局部症状总积分经比较,差异均无统计学意义(P>0.05)。3组患儿第1疗程及第2疗程干预结束后的裸眼远视力、屈光度、调节灵敏度及眼局部症状总积分经比较,差异有统计学意义(P<0.05)。组间比较3组患儿的裸眼远视力、屈光度及眼局部症状总积分,差异具有统计学意义(P<0.05),其中联合组与耳穴贴压组、眼周经皮穴位电刺激组相比差异具有统计学意义(P<0.05)。结论3种干预措施均可有效改善儿童轻度近视患儿的裸眼远视力、屈光度、调节灵敏度及眼局部症状,对轻度近视儿童具有治疗和防控近视进展的作用,疗效良好,且联合治疗对于儿童轻度近视的治疗及防控效果优于单一的耳穴贴压治疗或眼周经皮穴位电刺激治疗。

化工电气仪表数字化管理与智能检修技术

文章探讨了化工电气仪表数字化管理与智能检修技术的研究与应用,重点阐述了数据采集与监控、云计算与大数据分析、人工智能与机器学习、远程诊断与维护等关键技术,并以某化工厂的旋转设备预测性维护项目为例,说明了上述技术在提升设备可靠性、优化运维策略、降低生产成本等方面的显著效果,为推动化工行业的智能化发展提供了可资借鉴的经验。

自动化控制技术在电气仪表中的应用浅析

随着科技的不断发展,自动化控制技术逐渐成熟,为我国电气工程发展奠定了基础。在计算机网络技术、信息技术和自动化技术的不断升级中,其在不同行业的利用逐渐增多,通过与大数据、云计算等技术进一步融合,自动化技术拥有了智能化的特点。自动化控制技术在电气仪表中的应用,为电气行业的发展提供了更大程度的保障。文章针对相关内容进行了综合性的讨论与分析,阐述了自动化控制技术,列举了自动化控制技术的运用理念,提供了自动化控制技术在电气仪表中的应用。希望针对有关内容的探讨,能够使自动化技术在电气仪表方面发挥出更好的作用。

微功耗大气电场仪的设计与实现

针对旋转式地面电场仪能耗大、信号微弱、易受电磁干扰等问题,设计了一种新型微功耗大气电场传感器。该传感器通过驱动电子开关模拟传统传感器的屏蔽和去屏蔽过程,从而减小仪器能耗,延长电池持续供电时间。采用I/V转换器将传感器感应到的2路电流信号转为电压信号,并经过差分信号放大电路来消除工频干扰和共模影响。通过四阶带通滤波器进行滤波,进一步提高信噪比,并通过同步相敏检波器处理后得到了与场强成正比例关系的直流电压。经过16位模数转换器采样,测得大气场强的大小,试验验证了该系统在-50~50 kV/m场强范围内,测量分辨力可达10 V/m,测量线性度小于1%。

电气工程自动化中的仪表测控技术分析

现如今,我国工业生产发展迅速,电气工程自动化技术中的仪表测控技术在推动“机械化换人、自动化减人、智能化无人”工作中得到了广泛应用。如今,我国的电气工程自动化水平已经迈进优化发展的环节。针对电气工程自动化中的仪表测控技术应用展开研究,并就其中蕴含的问题提出相应的对策。希望通过研究能够促进我国仪表测控技术的发展。

基于电力模拟信号的井式电炉启动控制方法研究

井式电炉启动过程需要快速将温度升至设定值,以满足生产需求。然而,由于受电炉电流和转速等因素的限制,会导致超调量较大的问题出现。为了降低井式电炉启动控制超调量,提出一种基于电力模拟信号的井式电炉启动控制方法。电力调整器利用信号采集器采集井式电炉转速与电流的电力模拟信号,并通过A/D转换单元将其变为数字信号;微处理器利用增量式比例、积分、微分控制技术,结合数字信号,输出井式电炉启动控制信号;晶闸管驱动单元接收井式电炉启动控制信号后,驱动交流晶闸管,调整晶闸管导通角,启动井式电炉;利用电流检测单元,实时检测井式电炉启动电流,当启动电流过大时,利用过载/短路保护单元,关断晶闸管,防止晶闸管过热损坏;当启动电流正常时,利用其恢复电力调整器的井式电炉启动控制功能。实验证明:该方法可有效实现井式电炉启动控制,且井式电炉启动过程平稳;当突加负载时,该方法的井式电炉启动控制超调量较小,具备较优的井式电炉启动控制性能。