针对国内船舶管路系统详细设计与生产设计分离导致的设计数据源不统一、人工信息转换效率低、模型与原理校对困难和设计更改难一致等问题,提出基于三维体验平台(3D Experience Platform,3DEXP)逻辑到物理(Logical to Physical,L2P)关联...针对国内船舶管路系统详细设计与生产设计分离导致的设计数据源不统一、人工信息转换效率低、模型与原理校对困难和设计更改难一致等问题,提出基于三维体验平台(3D Experience Platform,3DEXP)逻辑到物理(Logical to Physical,L2P)关联设计技术的解决方案。L2P关联设计技术紧密联系逻辑对象和物理对象,是对船舶管路系统设计模式的创新。分析现有设计模式下各种问题产生的原因,研究L2P关联设计的设计流程、设计准备、原理图设绘和三维建模等内容,打通原理图与三维建模关联设计的技术路线,创建原理图与三维模型之间的关联,实现快速三维建模、智能模型校对、设计更改一致和单一数据源。应用测试结果表明,采用管路系统L2P关联设计技术能有效提高管路系统设计的效率和质量。展开更多
快速成像反演方法是近几年重磁勘探定量解释的一个发展热点,由于其在计算过程中不需要加入先验信息,故而可以较为快速地估算场源的深度与密度等相关参量。DEXP(depth from extreme point)成像法由于在深度加权函数中考虑了构造指数,使...快速成像反演方法是近几年重磁勘探定量解释的一个发展热点,由于其在计算过程中不需要加入先验信息,故而可以较为快速地估算场源的深度与密度等相关参量。DEXP(depth from extreme point)成像法由于在深度加权函数中考虑了构造指数,使得成像结果更为准确。笔者基于DEXP快速成像法的基本理论,首先,推导了重力异常及重力梯度张量的DEXP变换形式,并将其应用到场源解释之中;然后,采用理论模型试验,分别分析了数据的点距、误差、计算范围以及背景场对成像结果的影响;最后,将该成像方法应用于实测的全张量重力梯度数据,并与前人研究结果进行了对比与分析。理论模型试验与实际应用均表明:DEXP成像法能够有效压制数据噪声的影响,具有计算稳定性和准确性特点;数据的点距、计算范围和背景场均对DEXP成像结果具有一定的影响,因此在实际数据处理时,应该综合考虑它们对成像结果的影响,并且需要进行相关数据预处理以提高定量解释的精度。展开更多
The depth from extreme points(DEXP)method can be used for estimating source depths and providing a rough image as a starting model for inversion.However,the application of the DEXP method is limited by the lack of pri...The depth from extreme points(DEXP)method can be used for estimating source depths and providing a rough image as a starting model for inversion.However,the application of the DEXP method is limited by the lack of prior information regarding the structural index.Herein,we describe an automatic DEXP method derived from Euler’s Homogeneity equation,and we call it the Euler–DEXP method.We prove that its scaling field is independent of structural indices,and the scaling exponent is a constant for any potential field or its derivative.Therefore,we can simultaneously estimate source depths with diff erent geometries in one DEXP image.The implementation of the Euler–DEXP method is fully automatic.The structural index can be subsequently determined by utilizing the estimated depth.This method has been tested using synthetic cases with single and multiple sources.All estimated solutions are in accordance with theoretical source parameters.We demonstrate the practicability of the Euler–DEXP method with the gravity field data of the Hastings Salt Dome.The results ultimately represent a better understanding of the geometry and depth of the salt dome.展开更多
文摘针对国内船舶管路系统详细设计与生产设计分离导致的设计数据源不统一、人工信息转换效率低、模型与原理校对困难和设计更改难一致等问题,提出基于三维体验平台(3D Experience Platform,3DEXP)逻辑到物理(Logical to Physical,L2P)关联设计技术的解决方案。L2P关联设计技术紧密联系逻辑对象和物理对象,是对船舶管路系统设计模式的创新。分析现有设计模式下各种问题产生的原因,研究L2P关联设计的设计流程、设计准备、原理图设绘和三维建模等内容,打通原理图与三维建模关联设计的技术路线,创建原理图与三维模型之间的关联,实现快速三维建模、智能模型校对、设计更改一致和单一数据源。应用测试结果表明,采用管路系统L2P关联设计技术能有效提高管路系统设计的效率和质量。
文摘快速成像反演方法是近几年重磁勘探定量解释的一个发展热点,由于其在计算过程中不需要加入先验信息,故而可以较为快速地估算场源的深度与密度等相关参量。DEXP(depth from extreme point)成像法由于在深度加权函数中考虑了构造指数,使得成像结果更为准确。笔者基于DEXP快速成像法的基本理论,首先,推导了重力异常及重力梯度张量的DEXP变换形式,并将其应用到场源解释之中;然后,采用理论模型试验,分别分析了数据的点距、误差、计算范围以及背景场对成像结果的影响;最后,将该成像方法应用于实测的全张量重力梯度数据,并与前人研究结果进行了对比与分析。理论模型试验与实际应用均表明:DEXP成像法能够有效压制数据噪声的影响,具有计算稳定性和准确性特点;数据的点距、计算范围和背景场均对DEXP成像结果具有一定的影响,因此在实际数据处理时,应该综合考虑它们对成像结果的影响,并且需要进行相关数据预处理以提高定量解释的精度。
基金supported by the National Natural Science Foundation of China (Grant No.42176186).
文摘The depth from extreme points(DEXP)method can be used for estimating source depths and providing a rough image as a starting model for inversion.However,the application of the DEXP method is limited by the lack of prior information regarding the structural index.Herein,we describe an automatic DEXP method derived from Euler’s Homogeneity equation,and we call it the Euler–DEXP method.We prove that its scaling field is independent of structural indices,and the scaling exponent is a constant for any potential field or its derivative.Therefore,we can simultaneously estimate source depths with diff erent geometries in one DEXP image.The implementation of the Euler–DEXP method is fully automatic.The structural index can be subsequently determined by utilizing the estimated depth.This method has been tested using synthetic cases with single and multiple sources.All estimated solutions are in accordance with theoretical source parameters.We demonstrate the practicability of the Euler–DEXP method with the gravity field data of the Hastings Salt Dome.The results ultimately represent a better understanding of the geometry and depth of the salt dome.