What difference does the gig mobility service make in the workers’ human needs structure?

This paper aims to compare and contrast the perceived psychological experience of the traditional versus gig mobility service workers with respect to their human needs structure. Gig mobility service here refers to on-demand transportation service enabled by an online platform. Both qualitative and quantitative research methods were used. Using the perspective of ERG (Existence, Relatedness and Growth) theory, we first explored the field using in-depth interviews and observations of both worker groups. Based on the qualitative findings, we formulated the quantitative measures for the corresponding constructs. The constructs’ relationship and paths differences between the two groups were analyzed statistically using partial least square path modeling (PLS-PM) method. The differences between the two groups were categorized into four quadrants, highlighting what both groups have and do not have, as well as what one group has but not the other. It was found that the gig mobility service resulted in not only more relationships among the constructs, but also generally higher perceived well-being for the workers. It seems that the gig mobility service has so far been promising in meeting workers human needs despite its long-term uncertainty. This study is among the few studies on understanding in which way the technology has changed the mobility service actors seen as workers, rather than sellers or users.     

概率图模型及其图像与视频应用研究

概率图模型及其应用作为一个具有挑战性的研究领域目前已成为一个新的研究热点。概率图模型为解决智能信息领域的不确定性问题提供了重要途径。尽管目前概率图模型还处于不断发展之中,但近年来基于概率图模型的图像和视频智能信息处理的应用研究受到人们的关注,出现了许多有效的算法,这些算法为解决一些传统的图像和视频智能信息处理问题提供了新的途径。本文首先对概率图模型的3种重要表现形式、特性和主要技术进行了分析和讨论,在此基础上,以概率图模型在图像和视频中的应用为线索,对目前基于概率图模型的图像和视频智能信息处理的主要技术进行了概述和比较研究;最后对概率图模型所存在的一些问题及进一步的发展进行了展望。     

某型火炮预测与健康管理技术(PHM)体系结构设计与应用

故障预测与健康管理(PHM)技术已在航空航天领域取得较为广泛的应用,而在地面装备领域鲜有应用,为将故障预测与健康管理(PHM)技术从航空航天领域推广到地面装备领域,设计和构建了某型火炮的PHM体系结构;首先,通过对比和借鉴航空航天领域典型的4种PHM体系结构OSA-CBM开放式体系结构、集中式体系结构、分布式体系结构、分层融合式体系结构的特点,结合地面装备作战特点和实际工作环境,设计并构建了适于地面装备的PHM体系结构;然后,以地面装备的PHM构建思路为依托,将PHM体系应用到具体的某型火炮中,设计出了基于某型火炮的PHM体系结构,根据所构建PHM体系结构,详细描述了在火炮上的应用情况;最后展望了PHM技术在地面装备领域的发展趋势和对国防工业发展的借鉴意义。     

鲁棒保护-时滞跟踪自适应控制及其在球磨机上的应用

本文介绍鲁棒保护-时滞跟踪自适应控制新方法,着重论述该方法在球磨机微机自控系统 中的成功应用.实践和计算机仿真实验都一致表明:该方法成功而有效地解决了时变滞后系 统的控制问题,克服了自校正调节器等方法的主要缺点,其实际工程应用效果令人十分满意.     

Flex下的虚拟仪器控件设计和应用

利用富互联网技术表现力更强的优势,采用Flex语言设计了一组虚拟仪器控件,以便于将富互联网应用技术拓展到网络化测控、设备远程监测、虚拟实验等领域.介绍了Flex下虚拟仪器控件的设计方法和在Flex集成开发环境下的调用方法,并给出了一个富互联网应用模式的声音信号采集和分析虚拟实验的应用实例.     

企业无线网络信息安全及其保护措施研究

现阶段,无线网的应用范围快速扩大,其性能也在不断提高。无线网络的广域网建设以及局域网建设都已经得到成熟应用,其覆盖程度也达到惊人水平。同时,随着3G、4G技术的研发与进步,智能手机不断出炉,为无线网络的应用提供了无线的施展平台。据相关统计,目前个人计算机的应用水平已经被移动互联网超过。二十一世纪信息技术发展的一个重要标志就是无线网络技术。然而,尽管无线网络技术在各个领域得到广泛应用,但是也出现了一些令人担忧的问题,最为主要的就是无线网络的安全性问题,尤其是对企业信息安全带来的影响。因此,为了保障无线网络通信安全,需要采取有效措施来解决这些安全威胁问题。     

简缩极化SAR数据信息提取与应用

全极化(FP)成像模式丰富了合成孔径雷达(SAR)数据的信息量,在地物分类、环境监测、目标探测等领域取得了广泛应用,但是全极化系统受设计和维护复杂度、功率消耗、覆盖范围和数据下传等因素影响,制约了全极化SAR的应用.简缩极化(CP)SAR系统不仅降低了全极化SAR系统的复杂度,还能在一定程度上保持全极化信息,在森林参数反演、地物分类、目标检测等领域已取得了初步的成果.本文简要介绍了简缩极化SAR系统的基本原理,阐述了简缩极化SAR的全极化信息重建及分解的主要方法,并总结其近十年的主要研究成果,最后给出了其发展趋势.     

非负矩阵分解算法及其在生物信息学中的应用研究

非负矩阵分解是近年来快速发展的一类机器学习算法,能够实现对高维数据的维度规约及局部特征提取,在诸多生物信息问题的分析与处理中得到了广泛应用,并衍生出一系列实用算法。本文系统分析了非负矩阵分解的数学理论基础及其特有的局部表达属性,综述了标准非负矩阵分解与各种衍生算法的发展历程及算法初始化与参数选取方法的研究进展,并从序列特征分析、表达模式与功能模块识别、生物医学文献挖掘等几个方面总结了非负矩阵分解算法在生物信息学领域的应用成果。最后,指出了非负矩阵分解算法研究及其应用于生物信息处理所面临的问题,分析和预测了可能的发展方向。     

支持向量机理论及其在遥感图像处理中的应用

支持向量机(SVM)是在统计学习理论的基础上发展起来的一种新的学习算法,经过多年的研究,它的理论基础日渐成熟,它的应用领域逐步扩大.SVM在遥感图像处理领域内的研究也逐渐增多.介绍了支持向量机的理论以及近年来它在遥感图像分类、检索、特征提取、图像压缩、混合像元分解等方面的应用.随着支持向量机研究热的兴起,它必将在遥感图像处理方面发挥更大的作用.     

一种网络控制新方法及其液位控制应用

提出了一种应用新方法来解决网络控制系统（NCS）的时延问题;该方法在利用广义预测控制（GPC）基本原理的基础上,提出了克服网络时延的排队策略,并通过浙江大学局域网（ZJULAN）在三缸耦合液位控制系统中取得了很好的应用效果;液位控制的成功应用表明,该方法有很好的实用价值,不仅继承了GPC的鲁棒性,还能非常成功地处理网络时延和丢包等较恶劣的网络情况.     

Campus Grids Meet Applications: Modeling, Metascheduling and Integration

Air Quality Forecasting (AQF) is a new discipline that attempts to reliably predict atmospheric pollution. An AQF application has complex workflows and in order to produce timely and reliable forecast results, each execution requires access to diverse and distributed computational and storage resources. Deploying AQF on Grids is one option to satisfy such needs, but requires the related Grid middleware to support automated workflow scheduling and execution on Grid resources. In this paper, we analyze the challenges in deploying an AQF application in a campus Grid environment and present our current efforts to develop a general solution for Grid-enabling scientific workflow applications in the GRACCE project. In GRACCE, an application’s workflow is described using GAMDL, a powerful dataflow language for describing application logic. The GRACCE metascheduling architecture provides the functionalities required for co-allocating Grid resources for workflow tasks, scheduling the workflows and monitoring their execution. By providing an integrated framework for modeling and metascheduling scientific workflow applications on Grid resources, we make it easy to build a customized environment with end-to-end support for application Grid deployment, from the management of an application and its dataset, to the automatic execution and analysis of its results.The work has been performed as part of the University of Houston’s Sun Microsystems Center of Excellence in Geosciences [38].     

Morfit Web-3D仿真建模技术及其应用

该文是一个综述性的应用报告,主要介绍了Morfit Web-3D引擎的功能以及使用它进行环境仿真建模时的作用。Morfit Web-3D引擎集成了当前许多先进的算法和技术进步的成果,采用的是基于图象的3D建模方法。它使得利用数码相机拍摄的图片可以方便地结合到虚拟场景之中,克服了虚拟现实建模过程中构造场景细节时的大量细致和耗费人力的工作。与其它虚拟现实技术相比较在建模的速度上有一定优势。该文详细阐述了Morfit场景的主要构成对象、影响场景中物体显示效果的因数、控制动态物体在场景中运动的方法及创建Morfit Web3D场景的主要步骤。最后通过一个具体实例展示了它的实际应用效果及相关程序设计方法和流程。     

外汇买卖系统的设计与实现

文章介绍了已成功开发并推广应用的外汇买卖系统的设计目标和原则，系统的技术实现、系统功能模块的设计与特点。     

基于51内核的高性能单片机及其嵌入式系统

以目前功能和性能上均具代表性的8位高性能单片机8XC552为对象，对其在8051单片机基础上的新增功能及嵌入式应用系统的设计进行了分析和研究。对新增功能的分析包括：片内RAM与特殊功能寄存器、并行I／O口及其第二功能、A／D转换器与PWM的应用、定时器配与捕捉比较逻辑、监视定时器T3、IC总线和中断系统等；在嵌入式系统设计方面，指出了嵌入式应用系统设计的技术要点和关键问题。最后对嵌入式微计算机及其应用技术作了前瞻性展望。     

AN UNSUPERVISED INCREMENTAL LEARNING ALGORITHM FOR DOMAIN-SPECIFIC LANGUAGE DEVELOPMENT

While grammar inference (or grammar induction) has found extensive application in the areas of robotics, computational biology, and speech recognition, its application to problems in programming language and software engineering domains has been limited. We have found a new application area for grammar inference which intends to make domain-specific language development easier for domain experts not well versed in programming language design, and finds a second application in construction of renovation tools for legacy software systems. As a continuation of our previous efforts to infer context-free grammars (CFGs) for domain-specific languages which previously involved a genetic-programming based CFG inference system, we discuss extensions to the inference capabilities of GenInc, an incremental learning algorithm for inferring CFGs. We show that these extensions enable GenInc to infer more comprehensive grammars, discuss the results of applying GenInc to various domain-specific languages and evaluate the results using a comprehensive suite of grammar metrics.     

TCP友好速率控制协议的分析及应用

传统的TCP由于采用速率减半的拥塞退避机制而使其在数据传输时易产生过大的速率波动,而UDP不具备拥塞退避机制,在拥塞的网络环境中,UDP流将大量抢占TCP流的网络带宽,同时自身的丢包也迅速增加,并可能带来系统拥塞崩溃的潜在危险,因此TCP和UDP都不能很好地满足实时流媒体业务的需要。文中研究了一个具有拥塞退避机制、网络吞吐量波动小,且能够与TCP协议公平分享带宽的传输协议———TCP友好速率控制协议(TFRC),并将其应用于实时多媒体流传输应用程序。研究测试结果表明采用TFRC后多媒体的实时播放较TCP平滑了许多。     

Multiclass Lagrangian support vector machine

A support vector machine (SVM) has been developed for two-class problems, although its application to multiclass problems is not straightforward. This paper proposes a new Lagrangian SVM (LSVM) for application to multiclass problems. The multiclass Lagrangian SVM is formulated as a single optimization problem considering all the classes together, and a training method tailored to the multiclass problem is presented. A multiclass output representation matrix is defined to simplify the optimization formulation and associated training method. The proposed method is applied to some benchmark datasets in repository, and its effectiveness is demonstrated via simulation.     

Feedback stabilization of a class of distributed systems and construction of a state estimator

In this paper, we study feedback stabilization of a class of distributed systems governed by partial differential equations of parabolic type and its application to constructing a state estimator for asymptotic state identification. It is proved that, when a controller (an observation) can be arbitrarily constructed, observability (controllability) of the system is necessary and sufficient for stabilizing the system so that it has an arbitrarily large damping constant. As an application of this result, it is shown that a state estimator can be constructed, the output of which approaches asymptotically the real state of the system with an arbitrary convergence rate.     

“蒙古语名词语义信息词典”的开发与应用

2009年至今,“蒙古语名词语义信息词典”(以下简称为“名词语义词典”)通过几年的开发目前词典基本成形,并且有了显著的新进展。其新进展主要体现在词条的扩充、属性字段的增添及其初步应用。该文概要介绍“名词语义词典”的研发过程,实例说明这部词典的新进展和初步应用情况。     

VB6.0调用Matlab 6.5编程的实现

给出了利用动态连接库(DynamicLinkLibrary即dll),MatrixVB组件和Ac-tiveX技术,实现VisualBasic6.0对Matlab6.5的编程调用的方法并通过编程实践总结出各种实现方法各自的优缺点:利用动态连接库技术的方法实现较为复杂,但其功能强大,应用程序灵活性高;利用MatrixVB组件能够实现两者较为完美的结合,应用程序可以脱离编程环境发布,但是所能利用的函数有限;利用ActiveX技术的方法定制的应用程序需要Matlab操作平台的支持,但其实现简单,操作灵活。