384 results about "Coverage ratio" patented technology

An FRP is produced using a prepreg comprising reinforcing fiber, a sheet-like reinforcing fiber substrate containing reinforcing fiber, and a matrix resin, wherein the matrix resin is impregnated into the sheet-like reinforcing fiber substrate and also covers one surface of the sheet-like reinforcing fiber substrate, and the matrix resin impregnation ratio is within a range of 35% to 95%; a prepreg comprising reinforcing fiber, a sheet-like reinforcing fiber substrate containing reinforcing fiber, and a matrix resin, wherein the matrix resin exists on both surfaces of the sheet-like reinforcing fiber substrate, and the portion inside the sheet-like reinforcing fiber substrate into which the matrix resin has not been impregnated is continuous; or a prepreg comprising reinforcing fiber, a sheet-like reinforcing fiber substrate containing reinforcing fiber, and a matrix resin, wherein at least one surface exhibits a sea-and-island-type pattern comprising resin-impregnated portions (island portions) where the matrix resin is present at the surface and fiber portions (sea portions) where the matrix resin is not present at the surface, the surface coverage ratio of the matrix resin on those surfaces with said a sea-and-island-type pattern is within a range of 3% to 80%, and the weave intersection coverage ratio for the island portions, represented by a formula (1) shown below, is at least 40%, displays excellent external appearance, with no internal voids or surface pinholes, even when molded is conducted using only vacuum pressure. Island portions weave intersection coverage ratio (%)=(T / Y)×100   (1) (wherein, T represents a number of island portions that cover weave intersections, and Y represents a number of weave intersections within said reinforcing fiber woven fabric on said surface with said sea-and-island-type pattern).

The invention relates to a method for making a choice between a D2D cooperating multicast mode and a fixed relay cooperating multicast mode in a cellular system. Based on the fact that the sending speed is limited by the poorest channel quality of users in multicast transmission and based on the rule that the users with the poorest channel quality are usually distributed on the edge of a community, transmission of one jump is divided into transmission of two jumps with good channel quality so that the higher data transmission speed and the larger throughput capacity can be achieved. The method comprises the steps that the utility values of the fixed relay cooperating multicast mode and the D2D cooperating multicast mode at the second jump are compared according to the actual conditions, so that the optimal transmission policy is selected, and the overall operation utility value of the cellular system is increased. According to the method, the advantages of the two cooperating relay multicast modes are effectively combined, the relay mode is reasonably selected, the transmission speed of a multicast service and the coverage rate of the users at the edge are improved, the overall utility of the cellular system is optimized, and better user experience can be obtained; operation steps are simple, computation complexity is low, the technology is easy to achieve, and popularization and application prospects are good.

The object is to provide a photovoltaic power generation module that reduces the loss from a disk-shaped single crystal wafer and can make full use of arcuate cells, which have not until now been utilized effectively, and a photovoltaic power generation system employing same, to provide a photovoltaic power generation module having a high operating voltage per unit area (also called ‘area voltage’), and a photovoltaic power generation system employing same and, furthermore, to provide a photovoltaic power generation module that can increase the module coverage ratio relative to the effective area for installation on a house roof, and a photovoltaic power generation system employing same. The photovoltaic power generation module comprises arcuate cells divided from a disk-shaped single crystal silicon photovoltaic power generation cell, the arcuate cells having a circular arc with a central angle of 90°, the arcuate cells having a grid-perpendicular to the chord and at least one busbar perpendicular to the grid, and the arcuate cells being arrayed in a lattice pattern, wherein the arcuate cells have an area of 28 to 65 cm2 and 14 to 42 thereof are arrayed.

The invention discloses an optimization method for deploying the nodes of a wireless sensor network for regional monitoring. The method comprises the following steps: firstly, reticulating the wireless sensor network monitoring range which contains obstruction regions and hotspots, then creating an objective function which is to be optimized according to a node-detecting model and requirements for covering various types of regions, solving the optimal node-deployment position set by the particle-group optimizing algorithm, and designing two variation operators of the best-the worst variation and an elastic potential-energy in combination with the character of deployment so as to quicken the convergence-velocity of the particle-group optimizing algorithm, and finally using the Hungarian algorithm to obtain the optimal one-to-one mapping relationship between the original node-deploying position set and the optimized node-deploying position set so as to ensure that the nodes consume the least total energy for moving to the optimized deployment position. By the invention, the problem of higher-dimension optimization before node deployment optimization of wireless sensor network can be effectively solved, and the coverage rate of the regions under monitoring can be improved from the angle of object detection function.