Nanjing University

China University of Mining and Technology

Suzhou University of Science and Technology

Xuzhou Zhirun Mining Equipment Science and Technology Co., Ltd

Nanjing University Yancheng Environmental Protection Technology and Engineering Research Institute

Kunshan Public Security Bureau

Cheng Cheng

Xin Yang

Wei Li

Yi Tong Wang

Gang Shen

Bingcai Pan

Chen Chen

Songyong Liu

Hongxiang Jiang

Jinnan Wang

Yang Chen

Cheng Zeng

Xiaolin Zhang

Qizhi Xie

Hongzhuang Wu

Qian Zhang

Xuefeng Xi

Wei Tang

Baochuan Fu

Houguang Liu

Zhiming Cui

Jianhua Yang

Siyuan Pan

Zefang Chen

A method for retrieving footprint images is provided, comprising: pre-training models; cleaning footprint data and conducting expansion pre-processing by using the pre-trained models, dividing the footprint data into multiple data sets; adjusting full connection layers and classification layers of the models; training the models again by using the data sets through the parameters of the pre-trained models; saving the models trained twice, removing the classification layer, executing a feature extraction for images in an image library and a retrieval library to form a feature index library; connecting the features extracted by three models to form fused features, establishing a fused feature vector index library; extracting the features of the images in the image library to be retrieved in advance, and establishing a feature vector library; calculating distances in the retrieval library and the image library when a single footprint image is inputted, thereby outputting the image with the highest similarity.

Method for retrieving footprint images

The present invention discloses a single-drive bidirectional-crawling pipe-cleaning robot, including a front body assembly, a transmission assembly, and a rear body assembly. The transmission assembly is driven by a single power source, and a transmission effect of a connecting rod mechanism, a gear mechanism, and an equal-dwell cam mechanism is used to implement alternate retraction and support of the front body assembly and the rear body assembly in a radial direction and a telescopic motion in an axial direction between the front body assembly and the rear body assembly and at the same time implement synchronous rotation of a dredging cutter head, so as to implement bidirectional crawling and pipe cleaning work of the robot along a pipe. The present invention is stable, reliable, compact, and practical, and implements single-drive bidirectional crawling and pipe cleaning in a pipe having a greatly changing pipe diameter, so that the obstacle negotiation performance and adaptability to pipe diameter changes of an in-pipe robot are effectively improved, the endurance of the in-pipe robot is improved, and practical engineering significance in cleaning of a horizontal pipe having a greatly changing pipe diameter is provided.

Single-drive bidirectional-crawling pipe-cleaning robot

A resin nanocomposite, including a resin skeleton structure and nanoparticles. The resin skeleton structure is an aminated polystyrene. The nanoparticles are dispersed in the resin skeleton structure. The specific area of the nanocomposite is between 50 and 300 m/g, and the pore size thereof is between 5 and 40 nm. The invention also provides a method for preparing the resin nanocomposite, the method including: 1) mixing and dissolving a linear polyethylene with a chloromethyl polystyrene or a polyvinyl chloride to yield a polymer solution, and adding the nanoparticles to the polymer solution; 2) adding an alcohol solution to liquid nitrogen; adding the mixed solution dropwise to the liquid nitrogen to yield a mixture; allowing the mixture to stand; collecting, washing and drying resin beads to yield a composite material; and 3) adding the composite material to an amine solution for reaction, and washing and drying the resulting product.

Resin nanocomposite, method for preparing the same, and method for treating sewage with the same

The present disclosed are a high exchange-capacity anion exchange resin with dual functional-groups and method of synthesis thereof. The invention relates to the field of environmental function material synthesis and application. The resin is based on chloromethylated polystyrene-divinylbenzene polymer as matrix, and by primary amination and quaternization, yields an anion exchange resin with dual functional-groups having both a weak base anionic group and a strong base anionic group. The anion exchange resin not only has high adsorption capacity for water-born nitrate ions, but also can effectively squelch natural organic acids such as phytic acid in water, thus simultaneously removing nitrate ions and phytic acid organic matter from water. Therefore, the resin has a broad application potential in the fields of drinking water treatment, groundwater remediation, and advanced urban sewage treatment.

High exchange-capacity anion exchange resin with dual functional-groups and method of synthesis thereof

Growing community of inventors

Jiangsu, China

Cheng Cheng