Under the background of the Judicial Reform of China, big data of judicial cases are widely used to solve the problem of judicial research. Similarity analysis of judicial cases is the basis of wisdom judicature. In v...Under the background of the Judicial Reform of China, big data of judicial cases are widely used to solve the problem of judicial research. Similarity analysis of judicial cases is the basis of wisdom judicature. In view of the necessity of getting rid of the ineffective information and extracting useful rules and conditions from the descriptive document, the analysis of Chinese judicial cases with a certain format is a big challenge. Hence, we propose a method that focuses on producing recommendations that are based on the content of judicial cases. Considering the particularity of Chinese language, we use “jieba” text segmentation to preprocess the cases. In view of the lack of labels of user interest and behavior, the proposed method considers the content information via adopting TF-IDF combined with LDA topic model, as opposed to the traditional methods such as CF (Collaborative Filtering Recommendations). Users are recommended to compute cosine similarity of cases in the same topic. In the experiments, we evaluate the performance of the proposed model on a given dataset of nearly 200,000 judicial cases. The experimental result reveals when the number of topics is around 80, the proposed method gets the best performance.展开更多
An on-chip optical phased array (OPA) is considered as a promising solution for next generation solid-state beam steering.However,most of the reported OPAs suffer from low operating bandwidths,making them limited in m...An on-chip optical phased array (OPA) is considered as a promising solution for next generation solid-state beam steering.However,most of the reported OPAs suffer from low operating bandwidths,making them limited in many applications.We propose and demonstrate a high-speed 2D scanning OPA based on thin-film lithium niobate phase modulators with traveling-wave electrodes.The measured modulation bandwidth is up to 2.5 GHz.Moreover,an aperiodic array combined with a slab grating antenna is also used to suppress the grating lobes of far-field beams,which enables a large field of view (FOV) as well as small beam width.A 16-channel OPA demonstrates an FOV of 50°×8.6°and a beam width of 0.73°×2.8°in the phase tuning direction and the wavelength scanning direction,respectively.展开更多
基金the National Key Research and Development Program of China (2016YFC0800805)the National Natural Science Foundation of China (61772014).
文摘Under the background of the Judicial Reform of China, big data of judicial cases are widely used to solve the problem of judicial research. Similarity analysis of judicial cases is the basis of wisdom judicature. In view of the necessity of getting rid of the ineffective information and extracting useful rules and conditions from the descriptive document, the analysis of Chinese judicial cases with a certain format is a big challenge. Hence, we propose a method that focuses on producing recommendations that are based on the content of judicial cases. Considering the particularity of Chinese language, we use “jieba” text segmentation to preprocess the cases. In view of the lack of labels of user interest and behavior, the proposed method considers the content information via adopting TF-IDF combined with LDA topic model, as opposed to the traditional methods such as CF (Collaborative Filtering Recommendations). Users are recommended to compute cosine similarity of cases in the same topic. In the experiments, we evaluate the performance of the proposed model on a given dataset of nearly 200,000 judicial cases. The experimental result reveals when the number of topics is around 80, the proposed method gets the best performance.
基金National Key Research and Development Program of China (2021YFB2801703)National Natural Science Foundation of China (62105286,62135011)+2 种基金“Pioneer” and “Leading Goose” RD Program of Zhejiang(2022C01103)Natural Science Foundation of Ningbo Municipality (2023J282)Fundamental Research Funds for the Central Universities。
文摘An on-chip optical phased array (OPA) is considered as a promising solution for next generation solid-state beam steering.However,most of the reported OPAs suffer from low operating bandwidths,making them limited in many applications.We propose and demonstrate a high-speed 2D scanning OPA based on thin-film lithium niobate phase modulators with traveling-wave electrodes.The measured modulation bandwidth is up to 2.5 GHz.Moreover,an aperiodic array combined with a slab grating antenna is also used to suppress the grating lobes of far-field beams,which enables a large field of view (FOV) as well as small beam width.A 16-channel OPA demonstrates an FOV of 50°×8.6°and a beam width of 0.73°×2.8°in the phase tuning direction and the wavelength scanning direction,respectively.
