查询词典 virtual focus

Position tracker is one of the most critical input devices for human-machine interface utilities in virtual reality and other human-machine interaction systems.It determines the position and orientation of an object of interest (such as the user's head) and passes the information to the host computer in real time,which redraws the virtual world on the basis of the current visual point of the user.

位置跟踪器是虚拟现实和其它人机实时交互系统中最重要的输入设备之一，它实时地测量用户身体或其局部的位置和方向并作为用户的输入信息传递给虚拟现实系统的主控计算机，从而根据用户当前的视点信息刷新虚拟场景的显示。

Position tracker is one of the most critical input devices for human-machine interface utilities in virtual reality and other human-machine interaction systems.It determines the position and orientation of an object of interest (such as the user's head) and passes the information to the host computer in real time,which redraws the virtual world on the basis of the current visual point of the user.

摘 要：位置跟踪器是虚拟现实和其它人机实时交互系统中最重要的输入设备之一，它实时地测量用户身体或其局部的位置和方向并作为用户的输入信息传递给虚拟现实系统的主控计算机，从而根据用户当前的视点信息刷新虚拟场景的显示。

Ship virtual reality design is the application of virtual reality techniques in ship design, realizing two stratifications of virtuality. The first is making possible for the ship owner, designers, shipyard and ship classification society to participate in ship design steps to pre-experience the performance of production. Second, it can put the emphasis on manufacture system and carry out effective analysis on its feasibility.

船舶虚拟现实设计是虚拟现实技术在船舶设计中的应用，对船舶设计制造过程实现两个层次的虚拟：一是设计阶段使船东、设计所、船厂、船级社都能够参与，达到预先体验产品性能的目的；二是强调制造系统层次上对生产制造可行性进行有效分析。

According to the function of distributed emulator, optical information processing and image multi-object tracking system, the following three aspects were emphasized in this dissertation. Firstly, a vast virtual terrain, ground radar models and canyons were created for the distributed emulator with modeling software Creator. The radars were driven to scan during emulating and the real time terrain code was sent to Radar module. Secondly, an optics channel simulating the optics camera of a virtual aircraft was implemented with simulating software Vega. The 2-D information got from the channel was translated and sent to multi-sensor information fusion system as an optics information source. Thirdly, the dissertation studied some motion estimation methods and analyzed the factors which influence the speed and the precision of the block matching algorithms. Then an improved block matching method was proposed for image multi-object tracking system and applied in the system combined with frame difference method.

论文根据多传感信息融合实验系统中的分布式飞行仿真系统、光学信号处理器和图像多目标跟踪系统三个子系统的功能要求，具体完成了以下三方面的工作：首先利用建模软件Creator创建分布式飞行仿真系统中的大面积地形、场景中的地面雷达模型和峡谷地形，并在仿真过程中实时驱动雷达模型的扫描，同时为后续雷达仿真模块提供实时地形编码；其次利用仿真软件Vega，在分布式仿真系统中为光学信号处理器设计实现了光学通道，模拟飞行器的光学摄像机的功能，并且对由此通道获得的目标二维光学信息进行转化处理，作为光学信息源发送给后续的多传感信息融合器；最后针对图像多目标跟踪系统，在研究图像分割运动估计算法的基础上，通过分析影响块匹配算法速度和精度的因素，改进了块匹配运动估计算法，结合差分法可应用到目标跟踪系统中。

In order to improve the operator's ability of distinguishing, diagnosing, and solving printing failures, a simulation printing failures learning system was established on the applying platform of a virtual printing press. Operator can learn how to distinguish the types of printing failures, to find the causes, and to solve the problems from the simulating printed products on a virtual printing press.

为了提高操作者对印刷故障的识别、诊断和排除能力，通过建立在虚拟印刷机使用平台上的印刷故障学习系统，使学习者能够在脱离物理样机的情况下，根据虚拟印刷品学习判断印刷故障的类型、产生的原因和解决方法。

The effect of virtual experiment in teaching and experiment of the principle of hydraulic pressure was discussed, the idea and method in design of virtual instrument and experiment of hydraulic pressure element was introduced.

论述虚拟试验在液压原理教学和实验中的作用，介绍了液压元件虚拟仪器和虚拟试验的设计思想和方法，通过虚拟试验可直观体现液压元件的结构、原理及工作特性。

For instance, GNSS can be used to correct the odometers errors which are brought by skid and slip. Virtual balise and virtual signal can be achieved. It can reduce the cost of the train positioning system greatly by reducing trackside equipments and workload of maintenance. GNSS (Global Navigation Satellite System) develops quickly.

GNSS(Global Navigation Satellite System)可以提高列车定位的性能，例如采用GNSS技术可以对里程计打滑、抱死产生的误差进行校正；可以实现虚拟应答器、虚拟信号机，减少轨旁设备及维护工作量，大大降低系统成本。

The research of neural network realization can be traced back to 60's. It processes along with two avenues: fully hardware realization and virtual realization. Scientists have developed many neurochips supporting fully hardware realization. Neurocomputing simulating supporting environments, neurocomputing accelerators and parallel neurocomputing systems also have been developed for virtual realization of neural network.

神经网络实现技术的研究可以追朔到六十年代，该项研究一直是沿两个方向开展，即神经网络的全硬件实现和神经网络的虚拟实现，科学加们也研制出了许多支持神经网络全硬件实现的神经芯片，以及支持神经网络虚拟实现的各种神经计算软件模拟环境、加速器和并行神经计算机系统。

The successful mobile terminal test cases, which has completed With virtual instrument platform LabVIEW, shows that the research and development of TD-SCDMA terminal testing based on virtual instrument technology is the way forward.

本文首先介绍了一种基于虚拟仪器的终端综合测试解决方案；然后重点研究了在TD-SCDMA终端发射机与接收机的一致性测试中所需要测试的指标和测试方法、原理与算法；最后利用虚拟仪器软件NI LabVIEW 7.1编写了部分发射机测试指标的算法模块，并利用现有的仪器和硬件设备，搭建了一个仿真测试环境，同时配合编写了一个软件平台，实现对硬件的控制和对测试模块的调用。

The effect of punch virtual velocity and sheet virtual density on the sheet strain energy was studied in this paper.

从理论上分析了凸模虚拟速度和板料虚拟密度对薄板变形能的影响。

Pradeep Indulkar, a senior official at the Maharashtra state Home Ministry say 101 human were killed and 287 injured.

马哈拉施特拉邦内政部高级官员Pradeep Indulkar称，有101人在冲突中丧生，287人受伤。

Mark Frei, a senior vice president of West, says 80% of West's homeagents have some college education, compared with 30% of those whowork in office-based call centers.

Frei说，该公司80%在家办公的人员都拥有本科学位，而在公司电话中心工作的人中只有30%拥有本科学位。