Southeast University

China University of Mining and Technology

Jiangsu University

Inspur Suzhou Intelligent Technology Co., Ltd

Xuzhiu Kerui Mining Technology Co., Ltd.

Xin Liu

Zhencai Zhu

Gongbo Zhou

Fan Jiang

Tao Wang

Feng Li

Zhong Tang

Yu Li

Chuansheng Zhang

Niansheng Liu

Hongli Liu

Libing Wang

Lianfeng Han

Dongrun Liu

Lizheng Li

Fuxing Shi

Ning Gu

Chuansong Wang

Duifang Gu

Yaquan Liang

Shudong Wang

An automatic modeling method for object detection model, the method includes: Ssearching for an NAS network model according to a predetermined first neural network; Straining a first object detection model by using a training set, evaluating the current first object detection model by using a validation set after a number of training times reaches a first preset number of times, and outputting an evaluation result, wherein the first object detection model is a model obtained by detection part fusion of the NAS network model and a second object detection model; Scalculating a reward corresponding to the current first object detection model; Sadjusting parameters used for searching for the NAS network model according to the reward: repeating the steps S-Sfor a second preset number of times, and determining an optimal first object detection model according to the evaluation result. Further disclosed in the present invention is an automatic modeling device. The method and device provided by the present invention can search for different models according to different tasks, and improve an object detection effect.

Automatic modeling method and device for object detection model

The present disclosure discloses a time service and positioning network system for an underground chain-shaped large space in a coal mine. The system adopts a base station-level network internal time synchronization method which takes an optical fiber time service as a main part and takes a satellite time service as an auxiliary part to construct a time service and positioning network system with an unified time within the ad-hoc network base stations, based on the ad-hoc network base stations linearly arranged in the underground chain-shaped large space in the coal mine. Through the network construction, the network stabilization and the network application, the system unifies the time reference of the base station-level network and improves the positioning accuracy of the network application by utilization of the base station-level network internal time synchronization method. The system integrates the time service and positioning network system suitable for the underground coal mine and expands the network applicability based on an existing underground communication ring network.

Time service and positioning network system for underground chain-shaped large space in coal mine

The present invention relates to a method for molding a self-supporting silk fibroin catheter stent, which comprises preparing an excellent catheter stent by a mold casting and freeze-drying molding process using silk fibroin as a raw material. The raw material is silk fibroin extracted from natural mulberry silk; and the mold is a hollow tubular mold, having an outer shell that is a transparent polyethylene straw with a diameter of 6 mm and an inner core that is a fiber rod FRP with a diameter of 3 mm, with the two ends being closed. The mold casting and freeze-drying molding process comprises the steps of casting; pre-freezing; removing the mold and placing the mold onto a pre-frozen freeze-drying plate; and freeze-drying. The freeze-drying procedure comprises: (1) a pre-freezing stage; (2) a freezing-vacuum transition stage; (3) a gradient temperature-rising and freeze-drying stage; and (4) a secondary freeze-drying stage. The freeze-drying procedure is strictly regulated in accordance with the specifications of freeze-dried stents. The prepared stent has a good shape, and good tolerance without adding any additional components. The stent presents a three-dimensional porous space structure, the process is simple, and the stent meets the requirements for tissue-engineered vascular stent in clinic.

Method for molding self-supporting silk fibroin catheter stent

A sorghum cutting header and a sorghum harvester with large feed volume and multiple reeling pans includes a reeling header, a rod crushing device, and a reciprocating cutter device. The rod crushing device is located under the reeling header. The reeling header includes reeling pans, frame rods, bearing seats, reeling pan shafts, tandem shafts, and tandem shaft bearing seats. The reeling pan shafts are installed in parallel on the frame rod through bearing seats. The adjacent reeling pan shafts are in transmission connection, and at least one reeling pan shaft is in transmission connection with the power device. An inner part of any reeling pan shaft penetrates the tandem shafts. Both ends of the tandem shafts are supported on the frame rods, and one end of the tandem shafts is fixed on the tandem shaft bearing seats. The reeling pans are mounted on any reeling pan shaft.

Sorghum cutting header and sorghum harvester with large feed volume and multiple reeling pans

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Jiangsu, China

Xin Liu