Chinese Academy of Sciences

Beijing University of Posts and Telecommunications

Junfeng Guo

Jing Wang

Xin Li

Xia Tian Zhang

Yan Jiang

Xiaoli Wang

Wen Wen Yang

Bin Han

Xinhua Wang

Yongjun Zhang

Shanguo Huang

Ying Tang

Shan Yin

Xiujun Zhu

Zhipeng Bai

Xueyan Zhao

Chunmei Geng

Wengang Sheng

Baohui Yin

The present invention provides a method for processing a filter to obtain a calibration dust filter, and a method for off-site calibration using the calibration dust filter. In the present invention, a batch of filters that meets specific requirements is screened out as the basal filters, and then the basal filters are processed in an actual environment to obtain the calibration dust filters. The counted number of beta particles is measured before and after sampling, and then a correction factor K is inversely inferred. The beta attenuation suspended particulate analyzer is corrected using the correction factor K. It can be known from a calculation result in an embodiment that, when the beta attenuation suspended particulate analyzer is calibrated using the calibration dust filter, the concentration measured by the calibrated beta attenuation suspended particulate analyzer is more closer to the manually measured concentration, with a CV value roughly equal to 7% to 8%, thus better reflecting variations in pollution concentration of PM in the air.

Method for processing filter to obtain calibration dust filter, and method for off-site calibration using calibration dust filter

Disclosed is a method and device for target sequence identification, wherein an optical binary sequence and an all-zero sequence are subjected to an XNOR operation and a first candidate sequence set is generated by splitting the result sequence; a second candidate sequence set is generated by splitting the optical binary sequence; multiple binary sequences are selected from the first candidate sequence set and the second candidate sequence set according to the target sequence to generate a to-be-delayed sequence set; various delay duration are configured for each binary sequence of the to-be-delayed sequence set; a to-be-matched sequence set is generated after delaying; an AND operation is performed on the sequences of the to-be-matched sequence set to generate a final sequence; and the number and position of the target sequence in the binary sequence can be determined according to the number and position of a pulse in the final sequence.

Method for target sequence identification and device thereof

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Beijing, China

Junfeng Guo