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RISS 인기검색어
- 검색키워드
- 저자 : ( Yanyan Hou ) (검색결과 6 건)
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A Multiple Features Video Copy Detection Algorithm Based on a SURF Descriptor
Hou, Yanyan,Wang, Xiuzhen,Liu, Sanrong Korea Information Processing Society 2016 Journal of information processing systems Vol.12 No.3
Considering video copy transform diversity, a multi-feature video copy detection algorithm based on a Speeded-Up Robust Features (SURF) local descriptor is proposed in this paper. Video copy coarse detection is done by an ordinal measure (OM) algorithm after the video is preprocessed. If the matching result is greater than the specified threshold, the video copy fine detection is done based on a SURF descriptor and a box filter is used to extract integral video. In order to improve video copy detection speed, the Hessian matrix trace of the SURF descriptor is used to pre-match, and dimension reduction is done to the traditional SURF feature vector for video matching. Our experimental results indicate that video copy detection precision and recall are greatly improved compared with traditional algorithms, and that our proposed multiple features algorithm has good robustness and discrimination accuracy, as it demonstrated that video detection speed was also improved.
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Impact of instructional leadership on high school student academic achievement in China
Yanyan Hou,Yiran Cui,Danhui Zhang 서울대학교 교육연구소 2019 Asia Pacific Education Review Vol.20 No.4
The purpose of this study was to examine the impact of instructional leadership on high school students’ academic achievement in the Chinese context and to determine which specific instructional leadership dimensions have the most important role. The sample included 26 high schools with 26 principals and 4288 students in Shenyang, China. The principals rated their instructional leadership according to the Revised Instructional Leadership Questionnaire of China (ILQC-R). The hypotheses were tested using hierarchical linear models. The results indicated that, after controlling for student background, school context, and principal demographics, overall instructional leadership showed a significantly moderating influence on the relationship between high school entrance scores and college entrance scores for students. Regarding the four different dimensions, different influence trends were observed. The dimensions of managing instruction, defining the school mission and goals, and promoting teacher development were found to influence students’ college entrance scores in both direct and indirect ways; however, no significant impact on students from managing public relations was found.
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A Multiple Features Video Copy Detection Algorithm Based on a SURF Descriptor
( Yanyan Hou ),( Xiuzhen Wang ),( Sanrong Liu ) 한국정보처리학회 2016 Journal of information processing systems Vol.12 No.3
Considering video copy transform diversity, a multi-feature video copy detection algorithm based on a Speeded-Up Robust Features (SURF) local descriptor is proposed in this paper. Video copy coarse detection is done by an ordinal measure (OM) algorithm after the video is preprocessed. If the matching result is greater than the specified threshold, the video copy fine detection is done based on a SURF descriptor and a box filter is used to extract integral video. In order to improve video copy detection speed, the Hessian matrix trace of the SURF descriptor is used to pre-match, and dimension reduction is done to the traditional SURF feature vector for video matching. Our experimental results indicate that video copy detection precision and recall are greatly improved compared with traditional algorithms, and that our proposed multiple features algorithm has good robustness and discrimination accuracy, as it demonstrated that video detection speed was also improved.
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Huawei Li,Jifei Yang,Dengke Bao,Jie Hou,Yubao Zhi,Yanyan Yang,Pengchao Ji,Enmin Zhou,Songlin Qiao,Gaiping Zhang 대한수의학회 2017 Journal of Veterinary Science Vol.18 No.3
A simple and rapid immunochromatographic test strip incorporating a colloidal gold-labeled recombinant Nsp7 antigen probe was successfully developed for the detection of anti-porcine reproductive and respiratory syndrome virus (PRRSV) antibodies in swine. Recombinant Nsp7 protein of PRRSV labeled with colloidal gold was dispensed on a conjugate pad for use as the detector. Staphylococcal protein A and purified porcine anti-Nsp7 antibodies were blotted on a nitrocellulose membrane to form test and control lines, respectively. A comparison of the strip with standard diagnostic tests, enzyme-linked immunosorbent assays and immunoperoxidase monolayer assay, was also performed. The immunochromatographic test strip was shown to be of high specificity and sensitivity. Furthermore, the strip assay is rapid and easy to perform with no requirement for professional-level skills or equipment. It is suggested that the immunochromatographic test strip can be used to quickly and accurately detect PRRSV antibody and to be suitable for diagnostic purposes in the field.
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The Correlation between Thyrotropin and Dyslipidemia in a Population-based Study
Li Lu,Beibei Wang,Zhongyan Shan,Fengwei Jiang,Xiaochun Teng,Yanyan Chen,Yaxin Lai,Jiani Wang,Haibo Xue,Sen Wang,Chenyan Li,He Liu,Ningna Li,Jiashu Yu,Liangfeng Shi,Xin Hou,Qian Xing,Xue Bai,Weiping Te 대한의학회 2011 Journal of Korean medical science Vol.26 No.2
This study investigated the relationship between serum thyrotrophin levels and dyslipidemia in subclinical hypothyroid and euthyroid subjects. A total of 110 subjects with subclinical hypothyroidism and 1,240 euthyroid subjects enrolled in this study. Patients with subclinical hypothyroidism had significantly lower high density lipoprotein cholesterol (HDL-C) levels than those who were euthyroid. The lipid profiles were each categorized and mean thyrotrophin levels were higher in subjects in the dyslipidemia subclasses than subjects in the normal subclasses. Thyrotrophin was positively associated with serum triglyceride and negatively associated with serum HDL-C in women. Thyrotrophin was also positively associated with total cholesterol (TC) in the overweight population along with TC and LDL-C in overweight women. In the euthyroid population, thyrotrophin was positively associated with TC in the overweight population. In conclusion, serum thyrotrophin was correlated with dyslipidemia in subclinical hypothyroid and euthyroid subjects; the correlation was independent of insulin sensitivity.
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Zhendi Wang,Zhuo Zuo,Lu Li,Suping Ren,Tianchang Gao,Jingqi Fu,Yongyong Hou,Yanyan Chen,Jingbo Pi 대한약학회 2020 Archives of Pharmacal Research Vol.43 No.3
White adipocytes play a key role in maintainingwhole body energy homeostasis by forming white adiposetissue (WAT). The impairment of WAT formation or WATdysfunction is clearly associated with severe metabolic disorders. Mature adipocytes are derived from differentiatedpreadipocytes and are pivotal in energy storage and metabolism. Nuclear factor erythroid 2-related factor 2 (Nrf2) isa member of a family of CNC-bZIP proteins which exerttheir transcriptional control on genes harboring antioxidantresponse elements (ARE) in partnership with smallmusculoaponeurotic fibrosarcoma proteins. The activationof Nrf2-ARE coordinated by specific repressor Kelch-likeECH-associated protein 1 (Keap1) regulates networks ofgenes controlling diverse homeostatic processes involvingadaptive antioxidant response and detoxification amongmany other adaptive responses. Interestingly, accumulatingevidence indicates that Nrf2 may act as a transcription factorin regulating the formation and function of adipose tissues,including adipogenesis, lipid metabolism and insulin sensitivity. In this mini-review, an overview on the distinct rolesof Nrf2 in adipocytes is provided. While highlighting the regulatory role of Nrf2 in adipogenesis, recent key findingson Nrf2 in insulin signal transduction and energy metabolismof adipocytes are also summarized.
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