摘要:
Disclosed is method of computing a round trip delay between a pair of nodes, the method comprising transmitting at least one beacon at a known transmit time from each of the nodes; measuring the times-of-arrival of the beacons at other of the nodes; and estimating a round trip delay between the nodes from the measured times-of-arrival and the transmit times; and correcting the round trip delay for either or both of a frequency offset between the nodes and relative motion between the nodes.
摘要:
A method of generating an image enables animating an avatar on a device with limited processing capabilities. The method includes receiving, on a first computing device, a first image; sending, on a data interface of the first computing device, the first image to a server; receiving, on the data interface and from the server, shape data corresponding to an aspect of the first image; and generating, by a processor of the first computing device, a primary output image based at least upon the shape data and avatar data.
摘要:
A system for image manipulation enables an improved video conferencing experience. The system includes a camera; a display screen adjacent to the camera; a processor coupled to the camera and the display screen; and a memory coupled to the processor. Instructions executable by the processor enable receiving a source image from the camera and generating a synthetic image based upon the source image. The synthetic image corresponds to a view of a virtual camera located at the display screen.
摘要:
A method for converting syngas to Fischer-Tropsch (F-T) hydrocarbon products, the method comprising: (a) providing synthesis gas to a F-T reactor; (b) providing acetylene to the F-T reactor, the molar ratio of the acetylene to synthesis gas being at least 0.01; (c) reacting the synthesis gas and acetylene under suitable reaction conditions, in the presence of a catalyst, to produce F-T hydrocarbon products; and (d) recovering the F-T hydrocarbon products.
摘要:
The invention is to methods of gene silencing in arthropods using dsRNA. The method is include contacting the arthropod with, and/or directly feeding the arthropod, the dsRNA to the arthropods to deliver the dsRNA to arthropod tissues. It is envisaged that the methods of the invention will have use in determining the biological function of genes in arthropods. Methods of pest control of arthropods, and of protecting arthropods against parasites and predators are provided. Transgenic arthropods expressing dsRNA molecules are also provided by the present invention.
摘要:
Wheat having a reduced level of SBEIIa activity, that may have a relative high amylose content. Wheat having a mutant SBEIIa gene in the A genome. The wheat might additionally have reduced levels of SBEIIb activity. The wheat grain of this invention can be of a non-shrunken phenotype despite a lesion in the amylopectin synthesis pathway, and may also have a high relative amylose content.
摘要:
A device for matching acoustic impedance between an ultrasonic transducer (21) and a medium is disclosed. The device includes a body (20) comprising a material having a high acoustic impedance on an ultrasonic signal. The body contains a plurality of acoustic impedance matching horns (23) extending between two surfaces of the body wherein the mouths of the horns are disposed in one surface and the throats of the horns are disposed in another surface, the magnitudes of the lengths and flares of the horns are such that the horns are capable of transmitting the ultrasonic signal; and the magnitude of the flare of each horn is such so as to provide a substantially smooth transition in acoustic impedance to the ultrasonic signal between the mouth and throat of the horn.
摘要:
An ultrasonic sensor comprising a polarisation maintaining fibre (4) having two orthogonal linear principal axes and a straight sensing portion (5). A laser source (1) directs a beam through a quarter wave plate (2) to provide a circularly polarised beam to the input end (3) of the fibre. The beam emerging from the output end (8) of the fibre (4) is directed to a linear polariser (9) and the intensity of the beam is detected by a photodetector (10). A signal processor (11) thereafter generates a suitable driving signal for a display unit (12) indicative of mode coupling induced in fibre (4) by incident ultrasonic waves.