Related Technology Research on Navigation Electronic Map

2012 ◽  
Vol 236-237 ◽  
pp. 929-933
Author(s):  
Lin Liu ◽  
Wan Wu Li
Keyword(s):  
Production Process ◽  
Development Trend ◽  
Technology Research ◽  
Online Data ◽  
Electronic Map ◽  
Navigation Data ◽  
Dynamic Updating ◽  
Data Updating ◽  
The Development Trend

The paper discusses the main difference between the navigation electronic map and the general electronic map, analyzes the structure of the navigation electronic map system from the function and constitution, discusses the domestic navigation electronic map on the main source of data as well as the acquire method, puts forward two navigation data updating methods: the version - incremental navigation data updating method and the push type service - online data dynamic updating method , offers the production process of navigation electronic map and looks ahead to the development trend of the domestic navigation electronic map.

New Progress of Contemporary Cartography-Navigable Electronic Map

2012 ◽  
Vol 239-240 ◽  
pp. 582-586
Author(s):  
Lin Liu ◽  
Wan Wu Li ◽  
Chen Sun ◽  
Ting Xu
Keyword(s):  
Multimedia Information ◽  
Theoretical Basis ◽  
Development Trend ◽  
Geographic Information ◽  
Electronic Map ◽  
Additional Information ◽  
Thematic Information ◽  
Definition Of ◽  
The Development Trend

The paper gives the definition of the navigable electronic map, generalizes the theoretical basis of the navigable electronic map, analyzes the characteristics of the navigable electronic map from the aspects of the general characteristics, the data and the function, and studies the content of the navigable electronic map including the basic geographic information, the navigable thematic information, the auxiliary multimedia information, the dynamic additional information, and finally points out the development trend of the navigable electronic map.

The Research Progress of Intra-Row Mechanical Weeding Technology of Dry-Land

2015 ◽  
Vol 729 ◽  
pp. 187-191 ◽  
Author(s):  
Hong Chang Wang ◽  
Jin Tong
Keyword(s):  
Hot Spot ◽  
Development Trend ◽  
Developed Countries ◽  
Good Alternative ◽  
Advanced Technology ◽  
Research Progress ◽  
Technology Research ◽  
Dry Land ◽  
Research Institutes ◽  
The Development Trend

The farmland weeds directly affect the crops yields, and the intra-row weeds are more difficult to eliminate than inter-row weeds. With the harm of chemical weeding technology cognition by people, the growth of awareness of environmental protection consciousness and food safety, the non-chemical weeding technology get more and more attention. Mechanical weeding as a good alternative method get more attention, and the intra-row intelligent mechanical weeding technology becomes a hot spot of research. The research on intra-row intelligent mechanical weeding technology of China have a large gap compared with developed countries. In this work, the current research of intra-row mechanical weeding technology of developed countries and China was reviewed, and the development trend of intra-row intelligent mechanical weeding technology of China were prospected. The universities and research institutes should be encouraged to learn from foreign advanced technology and the design concept of intelligent weeding equipment, increase the investment in intelligent mechanical weeding technology research and promotion.

Automatic Programming Based on the Feature of the Parts

2013 ◽  
Vol 401-403 ◽  
pp. 1586-1589
Author(s):  
Mei Lian Bao
Keyword(s):  
Production Process ◽  
Development Trend ◽  
Cnc Machining ◽  
Automatic Programming ◽  
Machining Feature ◽  
Cnc Programming ◽  
The Development Trend

The structure of machining workpiece is more and more complex, from the perspective of CNC machining, contains a lot of processing features generally. Machining feature plays an important role for production process for CNC machining programming, CNC code, as well as the analysis of clamping. Feature programming is one of the development trend of automatic CNC programming. This improve the efficiency of programming greatly.

scholarly journals The development trend of AC-style PDPs

1998 ◽  
Vol 82 (Appendix) ◽  
pp. 311-311
Author(s):  
Tetsuji Okajima ◽  
Chizuka Tani
Keyword(s):  
Development Trend ◽  
The Development Trend

scholarly journals Experimental Study on Wake Evolution of a 1.5 MW Wind Turbine in a Complex Terrain Wind Farm Based on LiDAR Measurements

2020 ◽  
Vol 12 (6) ◽  
pp. 2467 ◽  
Author(s):  
Fei Zhao ◽  
Yihan Gao ◽  
Tengyuan Wang ◽  
Jinsha Yuan ◽  
Xiaoxia Gao
Keyword(s):  
Wind Speed ◽  
Wind Shear ◽  
Wind Farm ◽  
Wind Farms ◽  
Field Measurements ◽  
Development Trend ◽  
Asymmetric Distribution ◽  
Lidar Measurements ◽  
Wind Characteristics ◽  
The Development Trend

To study the wake development characteristics of wind farms in complex terrains, two different types of Light Detection and Ranging (LiDAR) were used to conduct the field measurements in a mountain wind farm in Hebei Province, China. Under two different incoming wake conditions, the influence of wind shear, terrain and incoming wind characteristics on the development trend of wake was analyzed. The results showed that the existence of wind shear effect causes asymmetric distribution of wind speed in the wake region. The relief of the terrain behind the turbine indicated a subsidence of the wake centerline, which had a linear relationship with the topography altitudes. The wake recovery rates were calculated, which comprehensively validated the conclusion that the wake recovery rate is determined by both the incoming wind turbulence intensity in the wake and the magnitude of the wind speed.

Application of Ubiquitous Sensor Network in Collection and Analysis of CNC Machine Tool Processing Status Information

2010 ◽  
Vol 455 ◽  
pp. 621-624
Author(s):  
X. Li ◽  
Y.Y. Yu
Keyword(s):  
Machine Tool ◽  
Sensor Network ◽  
Machine Tools ◽  
Thermal Error ◽  
Development Trend ◽  
Cnc Machine Tools ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Status Information ◽  
The Development Trend

Because of the practical requirement of real-time collection and analysis of CNC machine tool processing status information, we discuss the necessity and feasibility of applying ubiquitous sensor network(USN) in CNC machine tools by analyzing the characteristics of ubiquitous sensor network and the development trend of CNC machine tools, and application of machine tool thermal error compensation based on USN is presented.

Navigational Data Change Detection Based on Rasterizing Features & Attributes

2012 ◽  
Vol 256-259 ◽  
pp. 2279-2284
Author(s):  
Lian Ying Li ◽  
Zhang Huang ◽  
Xiao Lan Xu
Keyword(s):  
Change Detection ◽  
Detection Methods ◽  
Vehicle Navigation ◽  
Digital Map ◽  
Navigation Data ◽  
Data Production ◽  
History Of ◽  
Map Data ◽  
Data Updating

A necessary updating degree is vital for the digital map data in a vehicle navigation system. Only when the digital map data are well updated, can the quality of the navigation be assured. Today the companies devoting to the production of digital map data for vehicle navigation have to cost much labor, material and capital to collect and update data in order to maintain a necessary updating degree. Throughout the history of electronic navigation data updating, they have made considerable progress both on the methods and processes of data production, and the way of map management. Updating from the CD to the network, from the wired to the wireless, from the replacing to the incremental way, each of the technical changes is a power source to enhance the data updating rate. As we all know, the change detection is a prerequisite and base for the electronic navigation data updating. By rapidly developing the area with changes and using the appropriate updating method, we can scientifically maintain the original database of navigation data and terminal physical data. In view of this, starting from application needs for dynamic data updating, this paper analyses change detection methods of navigation data in different versions used for generating incremental data, and focuses on that of rasterizing features and attributes, exploring a new approach to quickly get the incremental data between versions.

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