Double Drum Road Roller advantage
2: Configure imported variable pump, infinitely variable speed walking, hydraulic double drive front vibration
3: Equipped with dual LED headlights, easy construction at night
4: Select large-capacity water tank with electronic sprinkler function
High-performance overall optimization and matching technology to achieve greater excitation force of the same tonnage model in the industry, high working efficiency, fully hydraulic drive stepless speed change, you can choose the compaction speed required for various working conditions to meet the needs of different working conditions . High-comfort level adopts full hydraulic drive, push forward and backward to complete forward, backward and brake operation, avoid frequent clutch, gear shift and brake, comfortable operation, high efficiency, and greatly reduce the operation intensity.
Hand Held Road Roller,Two Drum Roller Compactor,Drum Roller Compactor,1 Ton Compactor Shandong Nuoman Engineering Machinery Co., Ltd , https://www.chinanuoman.com
1: Equipped with Changchai (Changfa) engine, powerful, easy to start, nationwide warranty
“Research and demonstration of key technologies for monitoring and early warning of locusts in megacitiesâ€
On [China Instrument Network Instrument R&D], the "Twelfth Five-Year" National Science and Technology Support Program, titled "Key Technology Research and Demonstration for Internal Monitoring and Early Warning in Major Cities" (2015BAK11B00), has successfully passed expert evaluation organized by the Ministry of Science and Technology's Social Development Department in Beijing. Representatives from the Ministry of Science and Technology, the Department of Science and Technology, the 21st Century Center, the project organizing unit, the Ministry of Education, and the Basic Science and Technology Department were present at the meeting.
A video image of the event is shown below:
Mega-cities often face urban flooding due to heavy or prolonged rainfall that exceeds the city's drainage capacity, causing serious disruptions to daily life and significant economic losses. By researching key technologies for internal monitoring and early warning, it becomes possible to reduce the frequency of such disasters and enhance public safety.
In 2015, the Guangzhou Municipal Group, in collaboration with the Guangdong Meteorological Observatory and Sun Yat-sen University, officially launched the "Research and Demonstration of Key Technologies for Internal Monitoring and Early Warning in Major Cities" under the National Science and Technology Support Program.
Under the project titled "Study and Demonstration of Key Technologies for Monitoring and Early Warning of Intensive Urban Areas," Guangzhou Municipal Group Co., Ltd. was responsible for the "Research and Demonstration Application of Functional Protection and Restoration Technology for Urban Drainage Pipe Networks." This involved developing technologies for detecting, treating, and solidifying pipeline issues, as well as integrating these solutions effectively. The goal was to achieve a minimum of 5% disease detection in the drainage network of the Tianhe National Sustainable Development Experimental Zone, with 10% of pipelines analyzed for their condition and causes. The project also aimed to complete non-excavation repairs on at least 1,000 meters of pipelines, restoring their full drainage capacity.
The research focused on densely populated cities in highly urbanized regions of China, where the mechanisms behind urban flooding are not well understood, and precipitation forecasts lack accuracy and lead time. Through field observations and rapid urbanization studies conducted at the South Campus of Sun Yat-sen University, the project investigated the formation of urban flooding in real-time.
Building on this, the team developed quantitative precipitation estimation methods using Doppler radar and improved urban flood forecasting techniques. They proposed a refined urban flood model based on grid-based flow calculations and road convergence, enabling more accurate simulation and prediction of internal flooding processes. This transition from single-index warnings to multi-indicator systems significantly enhanced the precision and lead time of urban flood forecasting.
(Source: Ministry of Science and Technology, Guangzhou Municipal People's Government, China Institute of Water Resources and Hydropower Research)