34results about How to "Short flight distance" patented technology

The invention discloses an automatic unmanned plane express delivery shortest path program method. The address information of each to-be-delivered express is scanned through scanning equipment, all target sites of a present delivery task are determined, and the shortest path starting from an express distribution center, passing by all the target sites and finally returning back to the express distribution center is programmed. An initialization algorithm is firstly provided, a population including a series of molecules is generated, and each molecule represents a feasible path satisfying the delivery task; four corresponding chemical reaction sub algorithms are further provided, including a decomposition algorithm, a synthesis algorithm, a local search algorithm and a greedy search algorithm, iteration is carried out according to relevant rules, the molecule population is made to realize continuous evolution till iteration termination conditions are satisfied, a molecule of the population having the smallest potential energy is found out, and the optimal path is programmed. The method is advantaged in that on the condition that the delivery task of all the target express sites is accomplished, the total flight path of the unmanned plane is the shortest, the total consumption time is the shortest, consumption energy is effectively reduced, and express delivery efficiency is improved.

An object of the present invention is to provide a golf ball cover resin composition containing an ionomer resin with an excellent resilience and fluidity. Another object of the present invention is to provide a golf ball using an ionomer resin for a cover, with an excellent shot feeling, durability and resilience. The present invention provides a golf ball cover resin composition comprising (A) an ionomer resin consisting of a metal ion-neutralized product of a ternary copolymer composed of an olefin, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester; (B) a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a ternary copolymer composed of an olefin, an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α,β-unsaturated carboxylic acid ester, and (C) a zinc compound, wherein a content ratio ((A)/(B)) of (A) component to (B) component ranges from 50/50 to 80/20 in a mass ratio and a content of (C) component ranges from 0.1 part to 20 parts with respect to 100 parts by mass of a sum of (A) component and (B) component, and the golf ball cover resin composition has a melt flow rate (190° C., 2.16 kg) of 5 g/10 min or more.

The invention discloses a sabot separation device of a high-speed air cannon. The sabot separation device comprises a vacuum cavity, a deflating hole is formed in the vacuum cavity, and a thin film isarranged on the deflating hole. The separation device has small influence to the speed and attitude of an emitted projectile body and is convenient to install and maintain

The invention provides a course reversal method and device of an unmanned aerial vehicle, and relates to the field of unmanned aerial vehicles. The problem that an unmanned aerial vehicle has a relatively large risk in a flight process of flying to a standby landing point. The specific technical scheme is as follows: acquiring a target route, wherein the target route is a flight route of a currently executed flight task of the unmanned aerial vehicle; acquiring a standby landing point list, wherein the standby landing point list comprises at least one standby landing point; matching a course reversal point of the unmanned aerial vehicle with the at least one standby landing point according to the target route and a preset algorithm; determining a landing point of the unmanned aerial vehicle from the at least one standby landing point according to a matching result; and controlling the unmanned aerial vehicle to fly to the landing point along the target route. The unmanned aerial vehicle course reversal method and device provided by the invention are applied to course reversal of unmanned aerial vehicles.

An object of the present invention is to provide a golf ball traveling a great flight distance on driver shots and an excellent shot feeling. The present invention provides a golf ball comprising a spherical core, an intermediate layer covering the spherical core, and a cover covering the intermediate layer, wherein a material hardness (Hm) of a resin composition constituting the intermediate layer ranges from 65 to 80 in Shore D hardness, a material hardness (Hc) of a resin composition constituting the cover ranges from 57 to 72 in Shore D hardness, a hardness difference (Hm−Hc) between the material hardness (Hm) and the material hardness (Hc) is more than 0, and the intermediate layer has a surface hardness satisfying a hardness difference (HmsC−HmsD) between a hardness thereof shown in Shore C hardness (HmsC) and a hardness thereof shown in Shore D hardness (HmsD) of 27 or less.

An object of the present invention is to provide a golf ball resin composition with an excellent resilience and fluidity. Another object of the present invention is to provide a golf ball resin composition with a high hardness and durability. Yet another object of the present invention is to provide a golf ball traveling a great distance with an ionomer cover. The present invention provides a golf ball resin composition comprising, (A) an ionomer resin consisting of a metal ion-neutralized product of a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms; (B) a binary copolymer composed of an olefin and an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, and (C) a zinc compound, wherein a content ratio ((A)/(B)) of (A) component to (B) component ranges from 50/50 to 80/20 in a mass ratio and a content of (C) component ranges from 0.1 part to 20 parts with respect to 100 parts by mass of a sum of (A) component and (B) component, and the golf ball resin composition has a melt flow rate (190° C., 2.16 kg) of 15 g/10 min or more.

An object of the present invention is to provide a novel golf ball material that controls the spin rate on the approach shots while suppressing the change in the spin rate on the driver shots. Another object of the present invention is to provide a golf ball which produces a high spin rate on the approach shots and a low spin rate on the driver shots. The present invention provides a golf ball resin composition comprising: a polyurethane having a polyol component having a number average molecular weight from 200 to 1,500 as a constituting component.