To improve the adaptability and precision of slider-hole-wheel seed-metering device to meet requirements sowing, single factor simulation experiments three factors levels orthogonal were carried out based on discrete element method. The rotation speed seeding shaft, shape hole, depth hole set as experiment factors. results showed that qualified rate was highest when shaft 30 r/min, oval, 9 mm. ...

In view of the low seeding efficiency and precision seeders used for Brassica chinensis in China, a new double-row pneumatic metering device was designed, fabricated, evaluated. With characteristics small size high sphericity seeds mind, structure key dimensions plate were determined, force analysis seed-filling process carried out. The negative pressure (NP), angular velocity (AV) plate, cone ...

A method is presented to divide the measured total congestion in any freeway section into three ‘slices’: (1) the delay that collisions cause; (2) the potential reduction in delay at bottlenecks that ideal ramp metering can achieve; and (3) the remaining delay, due mainly to excess demand, but also to all other causes, including non-collision incidents, lane closures, and weather. The method in...

Smart Grids are becoming a reality all over the world. Nowadays, the research efforts for the introduction and deployment of these grids are mainly focused on the development of the field of Smart Metering. This emerging application requires the use of technologies to access the significant number of points of supply (PoS) existing in the grid, covering the Low Voltage (LV) segment with the low...

In present-day mechanized garlic seeding, high missing rates and low qualified percentages of single seeds are common problems; thus, a finger clip plate seed-metering device was designed in this study. First, the structure working principle were studied. Subsequently, critical component parameters determined using theoretical calculations; then, EDEM software used single-factor simulation expe...

In order to decide on advertisement fees for web servers, Naor and Pinkas introduced (threshold) metering schemes secure against coalitions of corrupt servers and clients. Several researchers have generalized the idea of Naor and Pinkas: first metering scheme with pricing and dynamic multi-threshold metering schemes have been proposed; later the solution has been extended to allow general acces...

To control the traffic flows near on-ramps and off-ramps, ramp metering installations can be used. We compare on-ramp metering and off-ramp metering, with respect to queue forming and total time spent. Both control measures are used to improve traffic flow on freeways, and both have influence on the route choice of the drivers. Although the two measures are very similar, there are some major di...

During the last century, there has been considerable economic growth and development of cities around the world. The growth has led to an expansion of car-ownership and ultimately increased congestion of the road network. Traffic engineers and transport planners have attempted to mitigate the consequences of congestion of motorways and freeways using a number of techniques. One of which has bee...

This documents presents an overview of current audio level and loudness measuring techniques and concepts, in the context of musical and post-production environments. It proposes a metering application, which is currently in early development, which should address metering needs currently unsatisfied in Linux.