Research on menu-typed man-machine interaction system of digital TIG welding machine

A digital man-machine interaction system controlled by communications between two processors of TMS320F240 and AT98C2051 was researched in the paper. The system is easy to set and modify welding process parameters by keyboards, and display information of welding site by LCD (Liquid Crystal Display). As one part of multi-task system about TIG welding machine, the coordination of man-machine interaction system with other tasks is the main point to the stability and reliability of its operation. Experiments result indicates that the system is stable, operation-flexible, high precision, and anti-interfering.

A 3D Geological Model Constrained by Gravity and Magnetic Inversion and its Exploration Implications for the World-class Zhuxi Tungsten Deposit, South China

The Zhuxi tungsten deposit in Jiangxi Province,South China,contains a total W reserve of about 2.86 Mt at an average grade of 0.54 wt%WO3,representing the largest W deposit in the world.Numerous studies on the metallogeny of the deposit have included its timing,the ore-controlling structures and sedimentary host rocks and their implications for mineral exploration.However,the deep nappe structural style of Taqian-Fuchun metallogenic belt that hosts the W deposit,and the spatial shape and scale of deeply concealed intrusions and their sedimentary host rocks are still poorly defined,which seriously restricts the discovery of new deposits at depth and in surrounding areas of the W deposit.Modern 3 D geological modeling is an important tool for the exploration of concealed orebodies,especially in brownfield environments.There are obvious density contrast and weak magnetic contrast in the ore-controlling strata and granite at the periphery of the deposit,which lays a physical foundation for solving the 3 D spatial problems of the ore-controlling geological body in the deep part of the study area through gravity and magnetic modeling.Gravity data(1:50000)and aeromagnetic data(1:50000)from the latest geophysical surveys of 2016-2018 have been used,firstly,to carry out a potential field separation to obtain residual anomalies for gravity and magnetic interactive inversion.Then,on the basis of the analysis of the relationship between physical properties and lithology,under the constraints of surface geology and borehole data,human-computer interactive gravity and magnetic inversion for 18 cross-sections were completed.Finally,the 3 D geological model of the Zhuxi tungsten deposit and its periphery have been established through these 18 sections,and the spatial shape of the intrusions and strata with a depth of 5 km underground were obtained,initially realizing―transparency‖for ore-controlling bodies.According the analysis of the geophysical,geochemical,and geological characteristics of the Zhuxi tungsten deposit,we discern three principles for prospecting and prediction in the research area,and propose five new exploration targets in its periphery.

Real-time forward modeling and inversion of logging-while-drilling electromagnetic measurements in horizontal wells

Based on the pseudo-analytical equation of electromagnetic log for layered formation,an optimal boundary match method is proposed to adaptively truncate the encountered formation structures.An efficient integral method is put forward to significantly accelerate the convergence of Sommerfeld integral.By asymptotically approximating and subtracting the first reflection/transmission waves from the scattered field,the new Sommerfeld integral method has addressed difficulties encountered by the traditional digital filtering method,such as low computational precision and limited operating range,and realized the acceleration of the computation speed of logging-while-drilling electromagnetic measurements(LWD EM).By making use of the priori information from the offset/pilot wells and interactively adjusting the formation model,the optimum initial guesses of the inversion model is determined in order to predict the nearby formation boundaries.The gradient optimization algorithm is developed and an interactive inversion system for the LWD EM data from the horizontal wells is established.The inverted results of field data demonstrated that the real-time interactive inversion method is capable of providing the accurate boundaries of layers around the wellbore from the LWD EM,and it will benefit the wellbore trajectory optimization and reservoir interpretation.

地面高精度磁法测量在青海某区地质矿产调查中的应用

为综合研究青海某区成矿远景和找矿潜力,本文通过对该区1∶5万地面高精度磁法测量数据资料进行一系列位场转换处理,分析全区磁场分布规律和异常信息特征,结合地质背景、岩石磁性特征和化探水系沉积物测量等资料着重对M1异常进行解释推断,圈定1处与基性—超基性岩关系密切的铜钴镍多金属A类找矿靶区,采用2.5D人机交互反演,拟合出异常体埋深、形态等赋存情况。本研究建立的与基性—超基性岩带有关的铜钴多金属矿的找矿模型,为邻区甚至布青山—阿尼玛卿构造带区域内的找矿工作提供借鉴经验。

面向节点化运动学模型的几何逆运动学

针对在度量空间中利用距离表征机器人运动学模型时的逆运动学求解问题,提出了一种基于普氏分析和列文伯格-马夸尔特法的几何逆运动学模型及求解算法。通过节点化机器人,针对机器人构型构建其三维形状,将机器人的几何逆运动学问题转化为当前形状与目标形状差异最小化的优化问题。具体地,首先对当前形状和目标形状进行普氏分析,以普氏距离作为度量损失,根据构型相似度优先或实时性优先需求决定普氏重叠策略;然后基于列文伯格-马夸尔特优化框架求解所构建的优化问题;最后通过350组求解算例与主流算法进行定性与定量对比、分析。实验结果表明,在选择不同策略时,所提方法在绝对精度、构型相似度、计算耗时三方面均优于主流逆运动学求解方法。

A SEMI-ANALYTICAL AND SEMI-NUMERICAL METHOD FOR SOLVING 2-D SOUND-STRUCTURE INTERACTION PROBLEMS

Based on the transfer matrix method and the virtual source simulation technique, this paper proposes a novel semi-analytical and semi-numerical method for solving 2-D sound- structure interaction problems under a harmonic excitation.Within any integration segment, as long as its length is small enough,along the circumferential curvilinear coordinate,the non- homogeneous matrix differential equation of an elastic ring of complex geometrical shape can be rewritten in terms of the homogeneous one by the method of extended homogeneous capacity proposed in this paper.For the exterior fluid domain,the multi-circular virtual source simulation technique is adopted.The source density distributed on each virtual circular curve may be ex- panded as the Fourier's series.Combining with the inverse fast Fourier transformation,a higher accuracy and efficiency method for solving 2-D exterior Helmholtz's problems is presented in this paper.In the aspect of solution to the coupling equations,the state vectors of elastic ring induced by the given harmonic excitation and generalized forces of coefficients of the Fourier series can be obtained respectively by using a high precision integration scheme combined with the method of extended homogeneous capacity put forward in this paper.According to the superposition princi- ple and compatibility conditions at the interface between the elastic ring and fluid,the algebraic equation of system can be directly constructed by using the least square approximation.Examples of acoustic radiation from two typical fluid-loaded elastic rings under a harmonic concentrated force are presented.Numerical results show that the method proposed is more efficient than the mixed FE-BE method in common use.

Calculation of circulation in the South China Sea during summer of 2000 by the modified inverse method

On the basis of hydrographic data obtained in August 2000 cruise, the circulation in the South China Sea (SCS) is computed by the modified inverse method in combination with SSH data from TOPEX/ERS-2 analysis. For study of the dynamical mechanism, which causes the pattern of summer circulation in the SCS, the diagnostic model (Yuan et al. 1982. Acta Oceanologica Sinica,4(1):1-11; Yuan and Su. 1992. Numerical Computation of Physical Oceanography.474-542) is used to simulate numerically the summer circulation in the SCS. The following results have been obtained. (1) The central and southwestern SCSs are dominated mainly by anticy-clonic circulation systems. They are mainly as follows. 1) There is strong anticyclonic eddy southeast of Vietnam (W1). Its horizontal scale is about 300 km, and it extends vertically from the surface to the about 1 000 m level. 2) There are a warm eddy W2 southeast of Zhongsha Islands and the anticyclonic circulation system W3 west off the Luzon Island. 3) There is a stronger cyclonic eddy C1 between the anticyclonic eddies W1 and W2.4) A strong northward coastal jet is present near the coast of Vietnam, and separates from the coast of Vietnam at about 12° N to the northeast.(2)The northern SCS is dominated mainly by a cyclonic circulation system. There is a cyclonic circulation system near and north of Section N2. (3) The southeastern SCS is dominated mainly by the cyclonic circulation system. (4) Comparing the results of circulation in the SCS during the summer of 2000 with those during the summer of 1998, it is found that they agree qualitatively, but there is the some difference between them in quantity.This shows that the circulation in the SCS has obviously seasonal feature. (5) The dynamical mechanism which products the basic pattern of summer circulation is because the following two reasons: 1) the joint effect of the baroclinity and relief (JEBAR) is essential dynamical cause; and 2) it is next important dynamical cause that the interaction between the wind stress and bottom topography under the southerly monsoon. (6) Comparing the hydrographic structure and distribution of stream functions with the SSH data from TOPEX/ERS-2 analysis in the SCS during August of 2000, they agree qualitatively.

An Efficient Tide-Surge Interaction Model for the Coast of Bangladesh

The numerical method of lines(MOLs)in coordination with the classical fourth-order Runge Kutta(RK(4,4))method is used to solve shallow water equations(SWEs)for foreseeing water levels owing to the nonlinear interaction of tide and surge accompanying with a storm along the coast of Bangladesh.The SWEs are developed by extending the body forces with tide generating forces(TGFs).Spatial variables of the SWEs along with the boundary conditions are approximated by means of finite difference technique on an Arakawa C-grid to attain a system of ordinary differential equations(ODEs)of initial valued in time,which are being solved with the aid of the RK(4,4)method.Nested grid technique is adopted to solve coastal complexities closely with least computational cost.A stable tidal solution in the region of our choice is produced by applying the tidal forcing with the major tidal constituent M2(lunar semi-diurnal)along the southern open-sea boundary of the outer scheme.Numerical experimentations are carried out to simulate water levels generated by the cyclonic storm AILA along the coast of Bangladesh.The model simulated results are found to be in a reasonable agreement with the limited available reported data and observations.

The inverse Bremsstrahlung absorption in the presence of Maxwellian and non-Maxwellian electrons

Inverse Bremsstrahlung absorption(IBA) of an intense laser field in plasma containing Maxwellian and nonMaxwellian(with Kappa and q-nonextensive distribution functions) electrons is studied analytically. Our results show that IBA decreases with an increase in temperature at high intensities and a decrease in plasma density for all kinds of distribution functions. Another striking result is that IBA is independent of the laser intensity at low intensity but is dependent on it when the intensity is going to rise. Also, it could be find that the behavior of the absorption as the function of laser intensity for the Kappa distribution with κ= 10 at low intensity is close to that for the Maxwellian distribution, but at high intensity it is close to that in the presence of q-nonextensive electrons with q = 0.9. These results provide insights into the inverse Bremsstrahlung absorption in the laser-plasma interactions.

震源机制解交互反演软件设计与实现

为快速获得中强地震可靠的震源机制解等震源参数,设计并研制了基于CAP方法的震源机制解交互反演软件(SeisCAP)。软件具有图形界面,可直接读取区域地震台网观测波形,交互挑选反演台站,自动开展观测波形处理、理论地震图计算和震源机制解反演。通过不同构造环境、不同震级和不同类型的多个中强地震事件测试,结果表明该软件具有可靠性和稳健性。该软件易使用,便于在中强地震发生后快速获取震源机制解,为地震应急和震源研究提供数据和资料。

Using Social Interaction to Invert the Professional Competencies of Future Architects

The article analyzes the results of a sociological study of the role of public and interdisciplinary communications for formation and inversion of architect’s competences.The study was carried out in 2021-2022 among students of architecture departments in Russia.About 3,000 students of the Moscow Architectural Institute(State Academy)and the Orel State University took part in the study.As a result of processing the data of the written questionnaire with correlation relationships,the potential of“external”educational communications was identified for acquisition of new professional knowledge and competencies in architecture;popularization of socially important ideas in architecture and spatial development;raising a sense of pride and respect for urban historical and cultural heritage;enhancing the prestige of the architectural profession and the status of architectural education;understanding social expectations of architectural activities and factors limiting implementation of projects;identifying factors influencing formation of strategies for the development of architectural education.Four stages of formation and inversion of professional competences in the educational process were singled out:1st-2nd years of training-an“orientation period”;3rd-4th years-the level of Bachelor of Science in Architecture,at which the groundwork of the professional thinking basics is laid-a stage of mastering the basic system-design skills;5th year(diploma thesis)-a stage of entry into creative practice;training at the level of Master of Science in Architecture-scientific-design practice in architecture.Issues concerning underrating the importance of future architects’involvement in joint activities with community and engineering professions representatives to realize the goals of sustainable development were identified;late awareness of the value of participation in volunteer programs.

重磁高效率反演及交互建模软件开发

重磁物性反演能够直观地获得地下的密度和磁化率结构,对于资源勘查方面具有重要价值。而面向当前航空、船载以及卫星等大范围乃至整个星球尺度的大数据量重磁数据,需要高效率处理与解释软件作为支撑。为此我们开发款重磁数据反演建模软件,实现重磁数据及其反演解释结构的传输、存储、管理、分析、计算、绘制,同时支持多种计算机语言的组件接口。其中针对传统重磁反演方法占用内存大、计算效率低的问题.

铜绿山矿田成矿远景预测及三维地质模型

铜绿山矿田是鄂东南矿集区最重要的矽卡岩型铜铁金多金属矿田,其成矿与铜绿山岩株体关系密切。因此,查明该岩体深部展布和形态及其与周缘灰岩大理岩的接触关系,对矿田深部找矿预测具有十分重要的意义。笔者在细致分析铜绿山岩体及岩株体、灰岩大理岩及捕虏体、矽卡岩矿体及矿化体等重磁异常组合特征的基础上,推测铜绿山岩体的边界,圈定铜绿山岩体内部灰岩大理岩捕虏体和矿化体,利用三维物性反演、2.5D重磁人机交互反演、3D重磁人机交互反演结果,结合钻孔、地质资料开展三维地质建模,获得了铜绿山矿田4000 m以浅的岩体、矿化体的三维地质模型,为该区的靶区圈定及深部找矿预测提供依据。

土-综合体结构相互作用体系地震反应影响因素研究

为探究土-综合体结构相互作用体系地震反应的影响因素,以典型综合体结构为工程背景,利用ABAQUS软件建立土-综合体结构相互作用体系三维有限元模型,采用等效线性化方法考虑土体非线性;选用1995年阪神地震Port Island波,通过反演获取相互作用体系的底部输入地震动。在此基础上,对土-综合体结构相互作用体系进行了地震反应分析,探讨了土-综合体结构接触面模拟、竖向地震波作用效应以及土-结构柔度比对综合体结构地震反应的影响。分析结果表明:土-综合体结构采用接触面模拟方法较共用节点法使得地下结构中柱轴力、剪力、弯矩均有一定程度减小,侧墙轴力、剪力、弯矩则有所增大;考虑竖向地震动作用使得地下结构中柱和侧墙的内力有所增大,其中中柱轴力增幅约达20%;在本文算例中,当土-结构柔度比小于12时,土-综合体结构相互作用效应明显。

北部湾盆地乌石凹陷始新统厚薄交互储层定量表征方法

南海北部湾盆地乌石凹陷以储层规模各异、非均质性强的厚薄交互储层为勘探开发目标。主力产层流沙港组沉积成因多样,砂体叠置样式不一,流二段呈薄互层叠置样式,流三段以厚层为主,夹部分薄层。研究区工区断裂较为发育,地震资料有效频带宽度5~60 Hz,主频仅为18 Hz,依靠常规波阻抗反演体难以进行研究区储层宏观岩性特征的有效识别,同时,如何突破地震分辨率对砂泥薄互储层的约束是亟待解决的一大难点。为此,在地震岩石物理响应分析、拟声波曲线构建的基础上,引入2种地震反演方法,提高了研究区不同尺度储层的识别效率,实现了乌石凹陷始新统厚薄交互储层定量表征。依据稀疏脉冲反褶积原理,建立了研究区反映波阻抗的声波曲线与反映砂泥含量的自然伽马曲线相融合的拟波阻抗地震反演方法,对各体系域砂体的宏观展布特征和有利砂体发育区带进行表征。在研究区首次采用地震协同多井约束的地质统计学反演,采用基于马尔科夫链蒙特卡洛的统计学反演方法,对流二段砂泥薄互储层进行小层级别砂体雕刻,构建砂体定量知识库。研究成果为研究区基于沉积微相导向的砂体对比提供了重要参数指导。

基于PMBM滤波的机动非椭圆扩展目标跟踪算法

扩展目标的形状大多是不规则的,且观测角度不同会发生变化,此外,在复杂场景下,还会存在扩展目标和点目标同时存在,且存在机动的问题,针对该问题,本文提出一种混合形状多模型泊松多伯努利混合滤波算法(IMM-VNNET-PMBM)。首先,通过子随机矩阵表示的形状多子目标非椭圆伽马高斯逆威沙特(GGIW),代替泊松多伯努利混合滤波框架下表示扩展目标的单GGIW密度,以提升形状估计精度;其次,目标运动状态发生变化时,扩展目标的形状信息通常也会发生变化,采用固定的形状子目标估计扩展目标形状将不准确,算法中通过基于密度的DBSCAN算法进行量测聚类,以多假设数据关联计算形状子目标分量的存在概率,自适应调整子目标数量,实现对扩展目标的时变形状估计;最后,算法通过融入交互多模型,实现了对复杂环境下的点目标和多机动扩展目标同时跟踪;实验结果表明,提出算法能够有效对机动且形状变化的多扩展目标跟踪,具有较好的跟踪性能。

车辆多目标交互行为建模的轨迹预测方法

预测周围智能体的运动轨迹是实现自动驾驶行为决策规划的关键。面对复杂的车辆交互影响和多模态驾驶意图所带来的难题,本文提出一种基于车辆多目标交互行为建模的轨迹预测方法。该方法采用条件变分自编码器生成轨迹终点的多模态结果,结合自注意力机制和多头注意力机制来捕捉车辆之间的群体交互影响,最终使用逆强化学习输出多模态轨迹的最优决策,实现了同步预测多个目标轨迹。在高速公路数据集NGSIM上的实验结果证明该模型的有效性,并且预测效果整体优于现有方法。

基于Web的重力异常正演建模工具

为使重力剖面正演建模工作更加高效且易于灵活应用,我们开发了套基于Web的重力异常正演建模工具。在正演算法方面,该工具采用了基于剩余节点密度模型的重力异常快速正演算法。在系统实现方面,我们将重力正演计算封装为REST风格的web API接口,采用Vue框架和Plotly可视化库实现了界面交互与数据可视化。

融合深度残差网络的双网3D手势交互算法

针对现有3D手势交互方法存在的精度、成本、泛用性三角抉择难题,受限于发展程度现有方法大多只能三者取其二,传统识别方法通常优先考虑成本和泛用性从而在精度上有所缺失,基于数据手套的3D手势交互保证了精度和泛用性的情况下无法解决过高的成本问题,以及针对特定领域开发(例如手语教学、交通手势识别)的方法在保证精度和成本的情况下仅在当前小范围领域内适用。为了平衡这一三角难题,找到三者之间的平衡点,提出了一种新的最低基于单目摄像技术的3D手势姿态估计算法。其峰值性能在保证识别精度的情况下,最高可达85~100 FPS。该算法是基于双网络融合架构来实现,主体架构分为前置识别网络和后置纠正网络,前置网络是基于ResNet50网络设计的二维关键点映射至三维的手部关键点检测,后置网络是基于逆运动学设计的纠正网络用来纠正映射偏差带来的非常规手型,使得识别结果更加顺滑,符合真实人体结构。架构的精准设计使得其可以利用更多范围内可用的手部训练数据源,在此基础上加入的后置纠正网络模块用来纠正手部细节,这种输出方式能够使得该算法更直接地应用于视觉设计和图形交互输出。经过多次实验对比后,相较于传统算法,该架构设计在保证识别速度的情况下,在各类数据集上平均识别精度提升1%~2%,同时基于MANO的建模效果更加精致逼真。

先验地质信息约束下的三维重磁反演建模研究--以安徽泥河铁矿为例

安徽泥河铁(硫)矿床是近年发现的大深度隐伏矿床,它的发现再次引发了庐枞地区深部找矿的热潮.建立矿区的三维精细地质模型,对寻找深、边部隐伏矿体,深入认识深部成矿、控矿规律意义重大.本文以泥河矿区为实例,开展先验地质信息约束的三维重磁建模研究,获得了矿区面积5.6km2(2.8km×2.0km)、深度1.2km内的三维地质模型.在三维可视化平台上对该模型进行了地质解释,全面分析了矿体、地层与次火山岩之间的空间分布及对应关系,发现铁矿主要赋存于闪长玢岩与砖桥组火山岩之间,且在玢岩穹窿地段矿体厚大,这对认识"玢岩型"铁矿的成矿模式具有重要的实际意义;三维模型的重磁正演响应基本拟合了实际重磁异常,说明在建模区域内已没有新的矿体;本文提出的三维地质建模流程可为其它地区开展类似工作提供借鉴,同时研究表明地质信息约束下的三维重磁建模研究在深、边部找矿和重磁异常的精细解剖等方面具有潜在的价值和广阔的应用前景.