GeoPyTool:A cross-platform software solution for common geological calculations and plots

GeoPyTool is an open source application developed for geological calculations and plots,such as geochemical classification,parameter calculation,basic statistical analysis and diagrams for structural geology.More than acting as a link from raw data stored in Microsoft Excel■(MS Excel)files to vector graphic files,GeoPyTool includes recently developed routines that have not been included in previous software,such as the calculation of the Ce(Ⅳ)/Ce(Ⅲ)ratio for zircons as a method to examine the temporal evolution of oxygen fugacity in the magmatic source for igneous rocks,and the temperature calculator with titanium in zircon and zirconium in rutile.Besides these routines,GeoPyTool also allows users to load any figure from articles or books as a base map.As a Python-based crossplatform program,GeoPyTool works on Windows?,MacOS X?and GNU/Linux.GeoPyTool can do the whole process from data to results without the dependence of Microsoft Excel?,CorelDraw?and other similar software.It takes Excel?XLSX and CSV(Comma Separated Value)as the formats of both the input data source files and the output calculation results files.The figures generated by GeoPyTool can be saved as portable network graphics(PNG),scalable vector graphics(SVG)or portable document format(PDF).Another highlight of GeoPyTool is the multilingual support,the official versio n of GeoPyTool supports both Chinese and English,and additional languages can be loaded through interface files.GeoPyTool is still in the development stage and will be expanded with further geochemical and structural geology routines.As an open source project,all source code of GeoPyTool are accessible on Github(https://github.com/GeoPyTool/GeoPyTool).Users with Python experience can join in the development team and build more complex functions expanding the capabilities of GeoPyTool.

The Design and Implementation of Qt-based Cross-platform Video Conferencing Remote Control

In order to overcome the defects of the dedicated video conference remote control, this paper designs and implements a Qt-based cross-platform video conferencing remote control. The remote control not only implements a full range of video conferencing control functions with an easy-to-use visual interface;but also implement cross-platform feature to allow users to use remote control software on their own equipment. It is economic, convenient and stylish for users. This paper mainly describes the design and implementation of remote control system framework and cross-platform features. Finally, the result in the paper shows: This remote control is reliable and easy to use.

Cross-coupling integral adaptive robust posture control of a pneumatic parallel platform

A pneumatic parallel platform driven by an air cylinder and three circumambient pneumatic muscles was considered. Firstly, a mathematical model of the pneumatic servo system was developed for the MIMO nonlinear model-based controller designed. The pneumatic muscles were controlled by three proportional position valves, and the air cylinder was controlled by a proportional pressure valve. As the forward kinematics of this structure had no analytical solution, the control strategy should be designed in joint space. A cross-coupling integral adaptive robust controller(CCIARC) which combined cross-coupling control strategy and traditional adaptive robust control(ARC) theory was developed by back-stepping method to accomplish trajectory tracking control of the parallel platform. The cross-coupling part of the controller stabilized the length error in joint space as well as the synchronization error, and the adaptive robust control part attenuated the adverse effects of modelling error and disturbance. The force character of the pneumatic muscles was difficult to model precisely, so the on-line recursive least square estimation(RLSE) method was employed to modify the model compensation. The projector mapping method was used to condition the RLSE algorithm to bound the parameters estimated. An integral feedback part was added to the traditional robust function to reduce the negative influence of the slow time-varying characteristic of pneumatic muscles and enhance the ability of trajectory tracking. The stability of the controller designed was proved through Laypunov's theory. Various contrast controllers were designed to testify the newly designed components of the CCIARC. Extensive experiments were conducted to illustrate the performance of the controller.

A mobile application framework of the BIM-based facility management system under the cross-platform structure

The building information model/modeling （BIM） technology is currently applied in a broad range of applications and research for facility management, while the BIM-based mobile FM is difficult owing to various factors and environments. For example, the mobile applications usually require frequent cross-equipment compatibility. This paper proposes a reasonable BIM-based FM cross-platform framework and develops a mobile application on the basis of an existing BIM-based FM system. The developed mobile application is applied in a case study of a metro station project in Guangzhou to verify its effectiveness in FM practice. It helps maintenance staff in viewing BIMs, accessing related information, and updating maintenance records in a unique platform. The test results demonstrate that the proposed BIM-based cross-platform framework meet the FM application requirements and supports the extension of FM functions.

A Scalable Method for Cross-Platform Merging of SNP Array Datasets

Single nucleotide polymorphism (SNP) array is a recently developed biotechnology that is extensively used in the study of cancer genomes. The various available platforms make cross-study validations/comparisons difficult. Meanwhile, sample sizes of the studies are fast increasing, which poses a heavy computational burden to even the fastest PC.Here, we describe a novel method that can generate a platform-independent dataset given SNP arrays from multiple platforms. It extracts the common probesets from individual platforms, and performs cross-platform normalizations and summari-zations based on these probesets. Since different platforms may have different numbers of probes per probeset (PPP), the above steps produce preprocessed signals with different noise levels for the platforms. To handle this problem, we adopt a platform-dependent smoothing strategy, and produce a preprocessed dataset that demonstrates uniform noise levels for individual samples.To increase the scalability of the method to a large number of samples, we devised an algorithm that split the samples into multiple tasks, and probesets into multiple segments before submitting to a parallel computing facility. This scheme results in a drastically reduced computation time and increased ability to process ultra-large sample sizes and arrays.

Variance Reduction Technique for Estimating Value-at-Risk based on the Cross - Entropy

Value-at-Risk （VaR） estimation via Monte Carlo （MC） simulation is studied here. The variance reduction technique is proposed in order to speed up MC algorithm. The algorithm for estimating the probability of high portfolio losses （more general risk measure） based on the Cross - Entropy importance sampling is developed. This algorithm can easily be applied in any light- or heavy-tailed case without an extra adaptation. Besides, it does not loose in the performance in comparison to other known methods. A numerical study in both cases is performed and the variance reduction rate is compared with other known methods. The problem of VaR estimation using procedures for estimating the probability of high portfolio losses is also discussed.

无人艇-机协同定位起降关键技术与验证

无人艇(USV)单平台执行水面任务易受平台限制,构建无人艇-机跨平台系统能实现平台优势互补。文章通过研究无人艇-机起降及补能技术,实现无人艇-机持久协同作业。首先,针对无人机(UAV)在动态USV上起降问题,开展无人艇-机协同定位起降技术研究,研究了无人艇-机速度、位置状态信息动态更新模型,实现了UAV在USV端高精度的起降;其次,针对UAV续航时间短的问题,开展UAV在USV端补能研究,研究了UAV端起降机构和USV端充电网机构,实现了UAV着艇快速补能;最后,在海面验证该无人艇-机跨平台起降补能系统性能,试验结果中,无人艇-机系统能在3.0 m/s的高速运动状态下,实现UAV在USV端的成功降落和补能,满足海上无人艇-机跨平台系统执行任务场景的需求。

黄-鱼原油管道海对海定向钻穿越技术浅析

海对海定向钻穿越是指定向钻的入、出土点都在海上,管道预制也在海上,可以减少对管线路由上的航道、交叉管缆等设施的影响,并有效保护环境,缩短施工周期,节省投资,满足不断发展的海上管道工程建设需要,市场应用前景广阔。基于此,以2022年的黄泽山—鱼山原油管道海对海定向钻穿越工程为例,介绍海上施工的工艺措施,为今后的海对海定向钻穿越工程积累宝贵经验。

EVE-NG与eNSP整合搭建跨平台仿真实验环境

针对EVE-NG仿真平台主要仿真思科设备、eNSP仿真平台只能仿真华为设备,而实际工程项目往往涵盖华为、思科多厂商设备的问题,探讨整合这两个仿真平台,搭建集成多厂商设备、符合实际工程项目的跨平台仿真实验环境。依据该平台仿真整个工程项目实践过程,为培养新工科背景下应用型网络工程专业人才提供了仿真环境。

基于ARM-Linux的SQLite嵌入式数据库的研究

开放源码的SQLite可实现基于文件系统的嵌入式关系数据库。首先,论文分析Linux下的常见数据库技术,详细分析了SQLite嵌入式数据库的内部结构和开发技术,着重介绍SQLite数据库在ARM-Linux平台上的应用开发、交叉编译和移植过程,并给出一个具体的例子进行说明。

基于自适应线性插值和最小二乘法的改进Cross测频算法

Cross测频算法简单且易于工程实现,但精度低,范围小,无法直接应用在电力系统监测与控制中。通过极小范数最小二乘法求解Cross算法中的偏差系数,并计算频率;应用自适应线性插值法修正标准基波频率以及对应周期内的采样点数,多次重复计算频率,并设计开发基于CompactRIO平台的Cross改进算法测频模块,进行系统试验。试验结果表明,改进后的算法测频精度高,频宽大,不仅适用于传统电网,也适用于主动配电网。

国际经济与贸易专业实践教学改革探索及建议--基于跨境电子商务创新创业实战操作平台

引入跨境电子商务创新创业实战操作平台对国贸专业实践教学进行改革不能搞一刀切,必须结合学校定位和办学方向,联系学校实际有计划有步骤地进行;不能以弱化现有传统国贸专业核心课程教学质量要求为代价,必须对传统国贸核心课程和跨境电商实战两手抓,两手都要硬;要积极探索并处理好实战操作与模拟操作的辩证关系,根据贸易生态环境变化和办学条件,因势利导进行调整;提倡以竞赛促教学,以改革促发展,校企合作,资源共享,实现学生综合素质提升和国贸专业发展良性互动。

小微外贸企业出口应收账款质押融资模式研究--“六稳”“六保”背景下基于跨境区块链平台视角

出口应收账款质押融资对缓解外贸企业面临的小额、高频、快急资金需求具有重要作用。通过研究小微外贸企业出口应收账款质押融资模式,分析其当前面临的四项难题,借助跨境区块链平台技术优势,立足“跨境区块链平台+银行”基础模式,结合实践探索出“跨境区块链平台+银行+信保”升级模式、“跨境区块链平台+银行+信保+登记”高级模式,着力弥补传统模式和新业态模式的短板。据此,提出完善数据利用、拓展应用场景、健全法律保障三大建议;并对跨境区块链平台应用场景进行了展望。

海洋平台GNSS RTK监测数据的CVCEEMDAN-WT-SSA去噪算法

针对GNSS-RTK技术在海洋平台变形位移监测过程中的多路径效应误差与随机噪声,本文提出一种基于交叉证认改进的具有自适应白噪声的完整集成经验模态分解(CVCEEMDAN)、小波阈值(WT)降噪方法及奇异谱分析(SSA)相结合的联合去噪算法。首先对原始信号进行CEEMDAN分解,使用交叉证认方法识别噪声与有效信号IMF分量;然后利用WT和SSA分别对噪声和有效信号分量作去噪处理,重构处理后的信号,获得真实变形监测结果。结果表明:本文算法具有自适应性,且相比EMD、EEMD、CEEMDAN、ACCEEMDAN-WT-SSA算法具有更好的去噪效果,可有效去除海洋平台变形监测中的多路径误差及随机噪声,成功获取真实的监测信号结果。

基于uni-app框架的校园极简生活跨平台移动应用的设计与实现

为了在大学校园推行极简主义生活方式,文章以uni-app跨平台移动UI框架为技术基础,开发了一款可以发布在Android、IOS、H5以及微信小程序等多平台的应用程序。通过对该系统的部署与应用,为今后开展与校园极简生活有关的实践提供了技术支持。

不同GPS-OEM芯片跨平台混合使用方案

GPS-OEM芯片因其自身优势而得到广泛应用。不同厂商生产的芯片输出的数据包格式不同,很难混合使用,虽有公共数据格式,但无法输出GPS原始观测数据。针对一种芯片编写的GPS数据处理程序,一旦更换GPSOEM芯片便无用武之地。文中提出一种数据处理转换方案,编写服务程序,使得用户程序无论运行于什么平台、采用何种通讯方式,只要能连接到Internet,便可以按照统一的格式获取GPS原始观测数据。

跨境电商平台用户体验对葡萄酒消费者购买意愿的影响--基于山东省的调查

基于山东省的512份有效问卷,构建以体验价值和消费认同为中介变量,双方国家政策为调节变量的理论模型,调查跨境电商平台用户体验对葡萄酒消费者购买意愿的影响。结果表明:用户体验中的功能、产品和服务体验对消费者购买意愿有正向显著影响;体验价值和消费认同在用户体验与消费者购买意愿之间发挥中介作用;双方国家政策正向调节消费认同和消费者购买意愿之间的关系。研究结论为葡萄酒跨境电商平台改善用户体验提供参考。

基于Wi-Fi及Web控制的智能家居系统设计

随着科学技术的发展,智能家居生活也渐渐成为趋势。然而,高成本、操作复杂的智能家居也仅仅在豪宅中应用。鉴于此种情况,我们有必要设计一种低成本、易操作的智能家居系统。将基于Wi-Fi的Web控制方法应用于智能家居中,其低成本、易操作和跨平台控制等特点能较为理想地完善整个智能家居系统。同时使系统的可控制性与可维护性大幅提高,不仅简洁直观而且方便后续功能的添加以及修改。此外,在本次设计的智能家居系统中,由于设备的简易性与可获得性使得系统本身的成本较低。因此本设计使普通人享受智能家居生活不再是遥不可及的梦想。

基于Mjpg-streamer的跨平台无线视频传输系统

为了解决基于Mjpg-streamer的远程视频系统只能通过特定浏览器查看与,可移植性差的问题,开发了采用QT框架的视频解码客户端,实现了跨平台的实时观测,改变了原系统对于浏览器的依赖性,提高了Mjpg-streamer远程视频系统的可移植性,使得系统的适用范围及使用方式更加宽泛及大众化。

跨境电商平台感知对消费者购买意愿的影响--基于UTAUT模型的研究

跨境电商平台越来越被商家和消费者重视,而消费者对跨境电商平台的感知会影响他们的决策和动机。利用UTAUT模型构建跨境电商平台感知对消费者购买意愿影响机制的理论研究模型,并对数据进行回归分析,结果表明:跨境电商平台功能、平台品牌影响消费者感知价值,与消费者感知价值正相关,平台功能、平台内容对平台品牌也产生影响;消费者跨境电商平台的感知价值与消费者购买意向正相关,消费者信任在消费者跨境电商平台感知与消费者购买意愿之间存在显著的中介作用。