Primary Analysis of the Causes of Temperature Changes after Songjiang Observation Station Transferring

Temperatures of the old station and the new one in Songjiang were compared with each other,and data via automatic weather station instead of manual observation after transferring were also analyzed.The results showed that the average temperature,the minimum temperature,the maximum temperature and the extreme temperature in the new observation station were all higher than those in the old one.The average temperature difference of the new observation and the old one from 20:00 to 08:00 of the next day was bigger than that from 08:00 to 20:00.There were two causes of temperature changes after Songjiang station transferring:one was that two stations were affected by the surrounding environment and the nature of underlying surface,and the other was that theory of sensing part,observation time and process were different between the automatic weather station and the manual observation.

Research and Exploration of Automatic Welding Wire Technology for Horn

With the development of science and technology,the electronic component industry has become more and more extensive,covering circuits,electrical and electrical systems from small to large.Many of these parts have very high requirements for the production process,and the production process requires a certain amount of workshop space.In the traditional production process,soldering is mainly manual welding.With the development of intelligence,impersonality and automation,the design of electronic products will gradually move towards intelligence.In this process,the application and promotion of welding technology is essential.In order to ensure the production of automatic products,this paper studies and discusses the function control problems and solutions of the soldering machine.Loudspeaker(commonly known as loudspeaker)is one of the most widely used electronic devices.With the development of the electronic industry and the change of the market environment,major manufacturers are developing new products to meet the market demand and product performance.In order to meet the needs of a large number of high reliability electronic products with different structures now and in the future,automatic welding technology is required to ensure that the welding quality and reliability have certain advantages.

A Trajectory Planning Method of Automatic Lane Change Based on Dynamic Safety Domain

Traditional research on automatic lane change has primarily focused on high-speed scenarios and has not considered the dynamic state changes of surrounding vehicles.This paper addresses this problem by proposing a trajectory planning method to enable automatic lane change at medium and low speeds.The method is based on a dynamic safety domain model,which takes into account the actual state change of surrounding vehicles,as well as the upper boundary of the safety domain for collision avoidance and the lower boundary of comfort for vehicle stability.The proposed method involves the quantification of the safety and comfort boundaries through parametric modeling of the vehicle.A quintic polynomial trajectory planning method is proposed and evaluated through simulation and testing,resulting in improved safety and comfort for automatic lane change.

Automatic Approach to Ontology Evolution Based on Change Impact Comparisons

Ontology evolution is the timely adaptation of ontologies to changing requirements, which is becoming more and more important as ontologies become widely used in different fields. This paper shows how to address the problem of evolving ontologies with less manual case-based reasoning using an automatic selection mechanism. An automatic ontology evolution strategy selection framework is presented that automates the evolution. A minimal change impact algorithm is also developed for the framework. The method is shown to be effective in a case study.

BIM模型编码可变性检验与自动匹配方法研究

为解决BIM元素变更导致的Web-BIM系统数据库与BIM元素无法匹配的问题,本研究首先根据各类BIM文件的特点,选择Rvt文件作为编辑BIM文件,选择Gltf文件作为Web端加载文件。对BIM模型的编码可变性进行了验证,结果表明对BIM构件尺寸修改、属性修改、位置移动等操作均不会改变构件的编码;若对BIM构件进行删除,该构件会被赋予新的编码,但其他构件的编码均不会被影响。本研究提出一种BIM模型变更前后自动匹配方法,通过建立元素识别和跟踪数据库、元素匹配算法、用户交互及确认、更新质量信息、定期检查等步骤,可以实现BIM模型变更前后Web端与BIM元素的匹配,为建筑项目的管理提供了有力的工具。

贵州草海生态监管平台研究与实现

立足贵州草海湿地生态系统的特点和治理管理需求,通过创建地理信息大数据条件下的环境监管技术框架,建立统一的环境监管数据库,构建基于全样本分析的生态异常自动变化监测技术体系、基于深度学习的自动或半自动要素提取技术体系以及大数据统计分析技术体系,研发“一张云图”共享平台及人类区域活动监测平台,为贵州草海的全数字化监管提供了坚强的科技支撑,助力草海实现“水清、山绿、景美、人和、鸟欢”目标。

刀库式加工中心自动换刀系统故障诊断与维修

我国是制造大国,数控机床作为工业生产的重要设备,能够有效提升工业生产自动化水平。主要探讨了刀库式加工中心自动换刀系统的故障诊断与维修策略,详细介绍了自动换刀系统的组成,包括自动换刀装置和自动换刀控制系统,并分析了刀库故障、换刀机械手故障以及主轴松刀故障等多种常见问题。在自动换刀控制系统故障方面,着重分析了换刀点漂移、刀库乱刀和换刀超时等问题,并提出了相应的诊断和维修策略。希望本文的研究能为相关技术人员提供参考和借鉴。

基于形变长短期记忆网络的换道意图预测

混行交通下的自动驾驶车辆需具备换道意图预测能力来保障行驶安全。为尽早预测车辆换道意图,提出一种基于形变长短期记忆(mogrifier long short-term memory,M-LSTM)网络的换道意图预测模型。首先采用S-G(Savitzky-Golay)滤波器对自然驾驶数据集NGSIM(next generation simulation)进行降噪筛选,按向左换道、向右换道、直线行驶对不同时间长度的轨迹序列标注,选取车辆运动信息与环境信息输入模型,最后采用softmax函数进行意图分类。试验结果表明,在不同预判时间下,模型准确率均高于支持向量机(support vector machine,SVM)、LSTM模型,且越接近换道点预测准确率越高,在1.0、2.5 s时预测准确率分别为93.83%与81.30%。提出的模型具有良好的准确性与预判性,能为自动驾驶车辆尽早识别换道意图提供技术支持。

轧机自动换辊装置研制

介绍了一种四辊可逆轧机的自动换辊装置。该设备安装于轧机操作侧,可实现自动更换成对工作辊或支承辊,且在其更换轧辊过程中,无需拆卸机旁盖板,便于留出物料通道。换辊过程操作稳定可靠,有效利用工厂空间,缩短了换辊时间,提高了轧线产能。

自动换卷机构的纸带拼接刚柔耦合分析与试验研究

针对卷烟纸带拼接中压模纹理与拼接力设计不当,易发生纸带拼接松脱、错位和穿透的问题,基于自动换卷机构的纸带拼接原理,建立自动换卷机构刚柔耦合模型,采用数值模拟与试验测试方法,研究对辊材料、拼接力和压模纹理对纸带拼接效果的影响规律。结果表明,4种对辊材料(橡胶、尼龙、铝、钢)的纸带拼接力仿真值分别为177.1,3.50×104,1.29×106,4.45×106 MPa,仿真结果与理论值相符。设计不同压模纹理的纸带拼接试验,测算出菱形压模拼接后的纸带断裂应力为1.040 MPa,弹性模量为17.816 MPa;矩形压模拼接后的纸带断裂应力为1.802 MPa,弹性模量为28.001 MPa,菱形压模拼接质量优于矩形压模。研究为自动换卷机构的对辊材料和压模纹理设计,以及纸带拼接效果评价提供技术支撑。

适应多类型纱筒的换筒末端执行器关键技术

为解决现有换筒夹持机构无法适用于不同规格纱筒抓取的问题,根据针织生产车间纱架结构特征和纱筒更换工艺流程,设计了由夹爪机构、刹车机构、离合机构、推纱机构、翻转机构等组成的换筒末端执行器,该末端执行器可通过外扩电动机和外张气缸分别调节夹爪收缩尺寸以及夹爪间角度,以适用于不同类型的纱筒抓取。在机构设计过程中,不仅对各组成部分及其运动原理进行分析,还通过ANSYS Workbench软件对不同直径和不同长度的夹爪进行了静力学仿真,得出夹爪的直径为18 mm、长度为58 mm时可满足设计要求。同时研制样机,并进行了不同规格圆柱筒和圆锥筒的抓取实验。实验结果表明:该换筒末端执行器能够稳定、快速抓取内径为20~65 mm、质量不大于6 kg的纱筒,可应用于圆型纬编针织生产线。

Automatic extraction of lunar impact craters from Chang'E-1 satellite photographs

The distribution characteristics of the impact craters can provide a large amount of information on impact history and the lunar evolution process. In this research, based on the digital elevation model （DEM） data originating from Change＇E-1 CCD stereo camera, three automatic extraction methods for the impact craters are implemented in two research areas： direct extraction from flooded DEM data （the Flooded method）, object-oriented extraction from DEM data by using ENVI ZOOM function （the Object-Oriented method） and novel object-oriented extraction from flooded DEM data （the Flooded Object-Oriented method）. Accuracy assessment, extracted degree computation, cumulative frequency analysis, shape and age analysis of the extracted craters combined display the following results. （1） The Flooded Object-Oriented method yields better accuracy than the other two methods in the two research areas; the extraction result of the Flooded method offers the similar accuracy to that of the Object-Oriented method. （2） The cumulative frequency curves for the extracted craters and the confirmed craters share a simi- lar change trajectory. （3） The number of the impact craters extracted by the three methods in the Imbrian period is the largest and is of various types; as to their age earlier than lmbrain, it is difficult to extract because they could have been destroyed.

Automatic Seamless Stitching Method for CCD Images of Chang’E-1 Lunar Mission

A novel automatic seamless stitching method is presented. Compared to the traditional method, it can speed the processing and minimize the utilization of human resources to produce global lunar map. Meanwhile, a new global image map of the Moon with spatial resolution of -120 m has been completed by the proposed method from Chang＇E-1 CCD image data.

基于改进遗传算法的换纱筒机器人路径规划

为了解决针织换筒机器人顺序换筒耗时长、功耗高问题,首先综合考虑换筒机器人移动距离和翻转等待时间,建立具有时空约束的换筒路径数学模型;其次基于自适应遗传算法,提出一种改进的近邻度初始种群算子和按位变异的局部搜索算子,得到改进的遗传算法。结果表明,改进遗传算法规划的换筒机器人路径所消耗的生产时间相对于人工排序缩减55.5%,改进算法收敛速度相对于传统遗传算法提升48.3%,改进算法最优解质量也优于其他几种传统启发式算法,提升了系统效率,证明改进遗传算法应用在换筒机器人路径规划优化问题中的可行性和有效性。

包含过渡区的可自动变模数字锁相环

针对传统的数字锁相环频带窄,速度慢,只能锁定中心频率附近频率的缺点,提出了一种具有快捕区、中捕区、过渡区和慢捕区的可变模可监测频率改变的全数字锁相环。该数字锁相环具有自动变模功能,可在锁定过程中自动改变数字滤波器模的值。针对传统数字锁相环在锁定快结束阶段容易进入慢捕区的缺点,在原有的捕捉区域中增加了过渡区,进一步加快了锁定速度。当输入的参考信号频率较高时,环路锁定速度更快。当参考信号在41.67~500 kHz时,系统最快可以在7.64μs内完成锁定。在锁定过程的后阶段,参考信号与输出信号的相位差个数在1~5个系统时钟中均匀分布,相位差系统时钟个数为5、3、2时的锁定速度快于相位差系统时钟个数为4、1。

代码审查自动化研究综述

随着现代软件规模的不断扩大,协作开发成为软件开发的主流趋势,代码审查成为现代化软件开发的重要工作流程.但由于人工代码评审往往耗费审查者较大精力,且存在审查者不匹配或审查者水平有限等问题,人工代码评审的质量和效率难以保证,且审查后的代码修复也十分费时费力.因此,亟需研究人员为代码审查流程进行改进,提供自动化思路.对代码审查自动化相关研究进行系统梳理和总结,并重点介绍4种主要方向:审查者推荐、代码变更质量评估、审查意见生成和代码自动修复.整理了相关方向的148篇研究,对每个方向的研究进行技术分类与分析.随后,整理了各方向研究任务的评估方法,并整理出常用的数据集与开源工具.最后,对代码审查自动化领域面临的问题进行梳理,并对未来研究进行展望.

光伏组件自动换行清洁机器人设计

针对光伏组件上灰尘降低光伏发电效率、影响光伏组件性能等现状,设计了一种光伏组件自动换行清洁机器人。该机器人包括清扫小车、换行小车、行走及换行轨道、锁紧装置及远程无线控制系统,清扫小车采用皮带刷上下清扫方式,换行小车负责运输清扫小车实现自动换行清扫。控制系统以ARM芯片MKW01Z128为主控芯片,清扫小车与换行小车之间可进行RF无线通信。样机现场试验表明:该清洁机器人清扫效率高、清扫效果良好,可以实现自动换行清扫、远程控制等功能,适用于大规模地面光伏电站。

Automatic Stitching Method for Chang＇E-2 CCD Images of the Moon

The lunar map is a product of primary scientific objectives of lunar exploration. Aiming at the characteristics of the Chang＇E-2 CCD data, an automatic stitching method used for 2C level CCD data from Chang＇E-2 lunar mission is proposed. Combining with the image registration technique and the characteristics of Chang＇E CCD images, the fast method proposed not only can overcome the contradiction of the high spatial resolution of the CCD images and the low positioning accuracy of the location coordinates, but also can speed up the processing and minimize the utilization of human resources to produce lunar mosaic map. Meanwhile, a new lunar map from 70oN to 70oS with spatial resolution of less than 10 m has been completed by the proposed method. Its average relative location accuracy of the adjacent orbits CCD image data is less than 3 pixels.

高炉热风炉独立外均压自动换炉工艺应用实践

针对常规鼓风充压工艺需要分流高炉鼓风流量,容易造成鼓风波动、炉况顺行不稳定等问题,在两座1 800 m^(3)高炉热风炉上应用了独立外均压自动充压换炉工艺,该工艺以“小压差、大流量”和“分段式、恒压差”方式对热风炉进行快速自动充压。投运以来,每座高炉热风炉日累计增加烧炉时间约5.6 h;在满足1 200~1210℃送风温度要求下,日煤气消耗总量没有明显改变;两座高炉日均出铁量平均增加了119 t,综合焦比平均降低了3.95 kg/t·Fe,煤气消耗平均降低了10 m^(3)/t·Fe。

全自动RaA氡测量仪研制

应对当前铀矿地质勘查领域中对土壤氡快速、准确检测的需求,设计了一款全自动RaA测氡仪。该仪器采用泵吸式主动取样,将土壤中气体通过采样器抽取至高压静电吸附腔内,对RaA子体进行富集。利用卷带式全自动换带结构,实现粒子收集带的自动更换,确保测量的连续性和高效性。通过一体化探测器,配合高灵敏度的幅值提取模块,精确采集并分析α谱数据。双气泵气路设计使排气和取气气路能够自动切换,无需手动插拔管道,确保全程监测并动态修正气体流量。系统还采用嵌入式程序设计,配备背光液晶显示屏和USB接口,实现与上位机程序的数据交互及远程控制。经实验验证,该仪器满足检定规程要求,在实际应用中可靠性高。该仪器自动化程度高,减少了人为操作误差,提升了数据的可靠性和一致性。在铀矿勘查领域具有广泛的应用前景,并为相关领域研究和应用提供了有力的技术支持。