Xi'an Creation Keji Co., Ltd.

Yu Zuo

Liang Zhang

Weiguo Zhang

Chen Liu

A method of road detection based on Internet of Vehicles is provided, the method is applied to vehicle terminals and includes: obtaining a target road image captured by an image collection terminal and inputting it into an improved YOLOv3 network, performing feature extraction by using backbone network of dense connection to obtain feature images with different scales; performing feature fusion of top-to-down and dense connection to the feature images by using an improved feature pyramid networks (FPN) to obtain prediction results; obtaining attribute information of the target road image according to the prediction results; the attribute information includes positions and categories of objects in the target road image; the improved YOLOv3 is formed by based on YOLOv3 network, replacing residual modules of backbone network to dense connection modules, increasing feature extraction scale, optimizing feature fusion mode of FPN, performing pruning and performing network recovery processing guided by knowledge distillation.

Method of road detection based on internet of vehicles

The present invention relates to a method for constructing orthogonal sequence sets in a CDMA system, including: step a: selecting natural numbers m and k, m and k satisfying m=2k+4: step b: constructing a 5-spectral value vector Boolean function; step c: constructing 24 orthogonal sequence sets by using the 5-spectral value vector Boolean function; and step d: allocating the orthogonal sequence sets to cells, and causing that sequences in each of the cells are orthogonal with one another, and sequences in each of the cells and sequences in neighboring one of the cells are orthogonal with one another. The constructing method provided by the present invention can increase the number of users in cells, reduce the signal interferences of neighboring cells, and improves the communication quality consequently.

Method for constructing orthogonal sequence sets in CDMA system, code word generating device, communication base station, base station controller, and wireless communication network

A preparation method for a SiGe based plasma p-i-n diode string for a sleeve antenna is provided. The preparation method includes: selecting a SiGeOI substrate with a certain crystal orientation and forming isolation regions on the SiGeOI substrate; etching the substrate to form P-type trenches and N-type trenches, depths of the P-type trenches and the N-type trenches each being smaller than a thickness of a top SiGe layer of the substrate; filling the P-type trenches and the N-type trenches and forming P-type active regions and N-type active regions in the top SiGe layer of the substrate by an ion implantation process; and forming leads on the substrate so as to obtain the heterogeneous SiGe based plasma p-i-n diode. Therefore, a high-performance heterogeneous SiGe based plasma p-i-n diode suitable for forming a solid-state plasma antenna is prepared by using a deep trench isolation technology and the ion implantation process.

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Xi'an, China

Yu Zuo