41results about How to "Change geometry" patented technology

The invention relates to an airbag, especially a passenger airbag, comprises a rear injection orifice, a front wall (14) for the impact of the occupant as well as two opposed sidewalls (16, 18) and an upper wall and a lower wall. Each of the upper and lower walls is split and consists of side portions (50, 52) which are juxtaposed and are connected to each other along opposite margins (40, 42), wherein the margins (40, 42) of the side portions which are juxtaposed and are connected to each other of the upper wall and / or the lower wall are extended in a nonlinear form. Thus the airbag can be easily and advantageously manufactured and the structure design can be fast adapted to different indoor contour.

The invention relates to a novel dimeric cationic surfactant. The structural formula of the surfactant is indicated as formula (A). The dimeric cationic surfactant introduces groups at a polar head to reach chemical bonding, restrain separating force among the original single-chain single heads and improve appetency among carbon chains, thereby improving surface activity and opening a brand new pathway for practical application. The surfactant has good water solubility. Compared with the general single-head surfactant, the surfactant has low surface tension and a cmc value and is a novel surfactant with a wide application prospect. As shown in the specification, wherein, n=18, 16, 14 or 12.

The invention discloses a truss structure with a high-order curve shape, comprising a connecting bar mechanism and an inhaul cable, wherein the connecting bar mechanism is obtained by interconnection of n four-connecting bar mechanisms by n-1 joints; the four-connecting bar mechanism is obtained by rotary connection of a first connecting bar, a second connecting bar, a third connecting bar and a fourth connecting bar; lengths of the first connecting bar and the fourth connecting bar are the same; lengths of the second connecting bar and the third connecting bar are the same; and lengths of the first connecting bar and the fourth connecting bar are longer than those of the second connecting bar and the third connecting bar. Because lengths of the first connecting bar and the second connecting bar in the connecting bar mechanism are different, in the movable truss, the joint of each sub connecting bar mechanism becomes arc during deformation; the corresponding geometrical shape is arc; and curvatures of the arcs change during the movement of the truss, so that the movable truss can form a geometrical shape with high-order curve.

The invention relates to a method and a device for growing a silicon carbide crystal according to a PVT (Physical Vapor Transport) method. A moveable heat-insulating adjusting element is arranged above a crucible; when the silicon carbide crystal grows, with the thickening of the crystal on a crucible cover, a distance D between the moveable heat-insulating adjusting element and the crucible cover is gradually increased, wherein the thermal resistance Rc of the crystal to thermal flux Q is increased, with the increasing of the thickness of the crystal; the equivalent thermal resistance Rb of the moveable heat-insulating adjusting element to the thermal flux Q is reduced while the distance D is increased; and the temperature of a crystal interface is kept unchanged by keeping the dynamic balance between the increment of Rc and the reduction of Rb. According to the method, a heat-insulating adjusting element on the crucible cover is changed into the heat-insulating adjusting element which can move according to the technical demand during the growing process of the crystal. A geometric structure of a heat-insulating system and the energy output of a graphite crucible are changed by changing the distance between the moveable heat-insulating adjusting element and the crucible cover, so that the purpose of adjusting the temperature field in the graphite crucible during the growing process of the crystal is achieved.

The invention provides an initiative light source type crop canopy reflection spectral measurement device and method and belongs to the field of geometrical optics and agricultural information nondestructive testing. A driving light source is a double-channel narrow-band LED (Light Emitting Diode) light source and adopts a special structure with adjustable light path parameters; the change of initiative light source irradiation characteristic parameters is realized according to measurement requirements so that spectral reflectance measurement of canopies with different scales can be met; a light path structure of a measurement system can guarantee that a constant value proportion relation can be kept when the height change is measured by a double-channel reflection spectral response value, so that measurement values of specific value type spectral indexes including NDVI (Normalized Difference Vegetation Index), RVI (Ratio Vegetation Index) and the like are theoretically not changed along with the measurement height.

The invention discloses a face caricature generation method based on a cyclic space transformation network, comprising: (1) selecting a training data set, analyzing photos and face caricature parts in the data set, and obtaining key point information of the face; (2) According to the key point information of the face, establish a space conversion model based on a recurrent space conversion network; (3) train and test the space conversion model; (4) establish a texture conversion model between photos and face caricatures, and conduct training Optimization; (5) Input the photos to be converted into the trained space transformation model, and send the space transformation result into the texture transformation model, and finally obtain high-quality face cartoons. Utilizing the invention, the generated human face caricature can not only have an exaggerated geometric structure, but also have an artistic style in texture and color, which greatly improves the aesthetics and interest.