4d

The Application and Development of 4D Technology in Project Management

4D技术在工程项目管理中的应用和发展趋势

The Product Data Model Based on Feature and 4D Information

基于特征和超图的产品4D信息的数据模型

Visual Construction Management System Based on Improved 4D Model

基于改进的4D模型的可视化施工管理系统

Research and Implement of 4D Movement Digital Film Control System

4D动感数字电影控制系统的研究与实现

Research on the Fundamental Technologies of Product 4D Information Model

产品4D信息模型的基础技术研究

System Simulation for Large-scale Bridge Construction Schedule Based on 4D CAD

基于4DCAD的大型桥梁施工进度系统仿真研究

The Development Aspect of The Building Engineering Project Management Software & 4D Modeling and Application

建筑工程项目管理软件的发展方向&4D建模及应用

Design of Process Technology of 4D Series Diesel Engine Crankshaft

4D型柴油机曲轴加工工艺设计

Study on 4D Product Information Model Based on Relational Hypergraph

基于关联超图的产品4D信息模型研究

The application of 4D CAD in the large-scale bridge construction schedule management

4DCAD在大型桥梁施工进度管理中的应用

Method for Gaining 4D Digital Product Effectively By Using Full Digital Photogrammetric System

用全数字摄影测量系统高效获取4D数字产品的方法

A 4D Chaotic System with Symmetry and Its Application on Information Hiding

一个对称的四维混沌系统及其信息隐藏应用

The culture system was divided into 4d group and 8d group .

培养体系分4天组和8天组组。

On the basis of the above the concept of 4D construction information model was put forward .

在此基础之上，提出了施工过程中的4D施工信息模型的概念。

Spatial Database Structure Design of 4D Products

4D产品的空间数据库结构设计

Application of 4D CAD in construction management

4DCAD技术在施工管理中的应用研究

Simulation of Dynamic Path Planning for UAV in 4D Space

四维空间中的无人机动态路径规划及仿真

Application of 3G technologies and 4D products to Yunnan frontier defence information system

3G技术4D集成在云南边防信息系统中的应用

Prediction of 4D Trajectory Based on Basic Flight Models

基于基本飞行模型的4D航迹预测方法

4D seismic data processing and its key

四维地震资料处理及其关键

The current development of medical CT ( compare Sensation 16 with Speed 4D )

医学CT的最新进展（Sensation16与Speed4D的比较）

Altitude and Speed Profile Counting Method of the 4D Guidance in Terminal Area

终端区域4D导引的高度剖面与速度剖面研究

No artificial preservatives & 4D products are used in our products .

我们的产品保证没有人为的添加任何的化学成份或4D产品。

Study on deep tectonic background of earthquake activity by using the 4D inversional method

用四维反演方法研究地震活动的深部环境

Hydrogen Passivation of Deep Level Related to 4d Transition Impurities in Silicon

氢对硅中4d过渡杂质的钝化

A Network-Based 4D Construction Management System

基于网络的建筑工程4D施工管理系统

Study of 4D Guidance System for Uninhabited Aerial Vehicle

无人机4D制导系统研究

Application of 4D technology in ecological enviroment dynamic monitor in the source of the three rivers

4D技术在三江源区生态环境动态监测体系的应用

Implementation of Demons Algorithm in 4D CT Image Registration

Demons算法在四维CT图像配准中的应用

The Analysis of Spectrum near the 4D Two-photon Resonance in Sodium Vapor

钠蒸气近4D能级双光子共振光谱分析