Email Spam Filtering Based on the MNMF Algorithm

Zun-xiong Liu,Shan-shan Tian,Zhi-qiang Huang,Jiang-wei Liu 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.1

Content-based email spam filtering is a challenging problem in which emails are often represented as high-dimensional data. This paper proposes an approach to email spam filtering based on max-margin semi-NMF (MNMF). MNMF combines the ideas of semi-NMF and max-margin and performs dimension reduction and classification simultaneously. In MNMF, we employ the same approach as Semi-NMF to update the coefficient matrix (while the other parameters are fixed) instead of quadratic programming. Simulation experiments were performed on two public Chinese email corpuses. The results show that MNMF is much faster and performs much better than support vector machine (SVM) classifiers that use features extracted by principal component analysis or linear discriminant analysis, and the MNMF method also outperforms SVM classification schemes in combination with feature extractions based on NMF and Semi-NMF

Effect of Freeze Drying on the Liquid Penetration of Chinese fir wood

( Jian Xiong Lu ),( Zhi Yuan Lin ),( Jia Ji Jiang ),( Jing Hui Jiang ) 韓國木材工學會 2005 한국목재공학회 학술발표논문집 Vol.2005 No.-

Analysis and application of zeolite in microspeaker box

Yuan-Wu Jiang,Dan-Ping Xu,권중학,Zhi-Xiong Jiang,김준형,황상문 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.8

Recently, miniaturization has become a hot topic in microspeaker research and has attracted considerable attention. However, the acoustic quality of microspeakers-evaluated in terms of the sound pressure level (SPL)-declines if their dimensions are reduced. This study discusses the application of zeolite in the microspeaker box without causing a change in speaker dimensions. The equivalent circuit method and Langmuir adsorption isotherm have been used to analyze SPL of the microspeaker box. Based on the analysis results obtained in this study, microspeaker samples have been manufactured and their effectiveness has been experimentally verified. Simulation and experimental results reveal that the zeolite can improve SPL by approximately 3.5 dB over a frequency range of 100–1000 Hz.

Disorders of Small and Large Intestine : Colorectal Cancer In Guangdong Province: A Demographic And Anatomic Survey

( An Gao Xu ),( Bo Jiang ),( Zhi Jin Yu ),( Xin Ying Wang ),( Xu Hui Zhong ),( Ji Hong Liu ),( Li Shou Xiong ),( Qiu Yun Luo ),( Ai Hua Gan ) 대한소화기학회 2007 SIDDS Vol.9 No.-

Background/Aims: Colorectal cancer is the third leading incidence of malignant tumour in the world and the incidence of colorectal cancer has steadily been increasing in Asia in recently years. The aim of our study is to determine the basic demographic features of patients with colorectal cancer and the anatomic distribution and characteristics of the tumour in Guangdong population. Methods: A review of patients from 1990 to 2004 at five hospitals was conducted, including Peal Triangle Area in Guangdong (Nanfang Hospital and Huizhou Central People`s Hospital), North area of Guangdong (Shaoguan North-Guangdong People`s Hospital), West area of Guangdong (Affiliated Hospital Guangdong Medical Institute) and East area of Guangdong (Meizhou People`s Hospital). Results: Analysis was carried out on 6,501 patents, only 6,488 cases provided age. The age ranged from 5 years old to 91 years old and the mean age of 6,488 cases is 59. 5.2% (340/6,488) of the patients was young CRC patients. The peak incidence was between the ages 61 and 70 years old (29.5%). The mean age increases from 55 years old (1990-1992) to 61 years old (2002-2004) and the proportion of young CRC patients descends from 7.1% to 3.5%. The make to female ratio is 1.5:1 and the ratio increased with age increasing. Of 6,501 lesions, 3,423 (52.7%) were located in rectum and 3,078 (47.3%) in colon, the ratio of rectum cancer to colon cancer is 1.1:1. The proportion of rectum cancer decreased significantly from 74.5% (1990-1992) to 64.9% (2002-2004) and that of the right sides colon cancer increased from 25.5% to 35.1%. In four different areas, the mean age of CRC increasing and East area of Guangdong ranked the fist. There was no significant difference in the ratio of male to female. Conclusions: The demography of colorectal cancer in Guangdong is different from before and further study should be pursued to find the reason.

Comparative Effectiveness of Risk-adapted Surveillance vs Retroperitoneal Lymph Node Dissection in Clinical Stage I Nonseminomatous Germ Cell Testicular Cancer: A Retrospective Follow-up Study of 81 Patients

Fan, Gang,Zhang, Lin,Yi, Lu,Jiang, Zhi-Qiang,Ke, Yang,Wang, Xiao-Shan,Xiong, Ying-Ying,Han, Wei-Qin,Zhou, Xiao,Liu, Chun,Yu, Xie Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.8

Purpose: To retrospective assess the potential predictors for relapse and create an effective clinical mode for surveillance after orchidectomy in clinical stage I non-seminomatous germ cell testicular tumors (CSI-NSGCTs). Materials and Methods: We analyzed data for CSI-NSGCTs patients with non-lymphatic vascular invasion, %ECa < 50% (percentage of embryonal carcinoma < 50%), and negative or declining tumor markers to their half-life following orchidectomy (defined as low-risk patients); these patients were recruited from four Chinese centers between January 1999 and October 2013. Patients were divided into active surveillance group and retroperitoneal lymph node dissection (RPLND) group according to different therapeutic methods after radical orchidectomy was performed. The disease-free survival rates (DFSR) and overall survival rates (OSR) of the two groups were compared by Kaplan-Meier analysis. Results: A total of 121 patients with CSI-NSGCT were collected from four centers, and 81 low-risk patients, including 54 with active surveillance and 27 with RPLND, were enrolled at last. The median follow-up duration was 66.2 (range 6-164) months in the RPLND group and 65.9 (range 8-179) months in the surveillance group. OSR was 100% in active surveillance and RPLND groups, and DFSR was 89.8% and 87.0%, respectively. No significant difference was observed between these two groups ($X_2=0.108$, P=0.743). No significant difference was observed between the patients with a low percentage of embryonal carcinoma (<50%) and those without embryonal carcinoma (87.0% and 91.9%, $X_2=0.154$, P=0.645). No treatment-related complications were observed in the active surveillance group whereas minor and major complications were observed in 13.0% and 26.1% of the RPLND group, respectively. Conclusions: Active surveillance resulted in similar DFSR and OSR compared with RPLND in our trial. Patients with low-risk CSI-NSGCTs could benefit from risk-adapted surveillance after these patients were subjected to radical orchidectomy.

Enteric dysbiosis-linked gut barrier disruption triggers early renal injury induced by chronic high salt feeding in mice

Jingjuan Hu,Haihua Luo,Jieyan Wang,Wenli Tang,Junqi Lu,Shan Wu,Zhi Xiong,Guizhi Yang,Zhenguo Chen,Tian Lan,Hongwei Zhou,Jing Nie,Yong Jiang,Peng Chen 생화학분자생물학회 2017 Experimental and molecular medicine Vol.49 No.-

Chronic high-salt diet-associated renal injury is a key risk factor for the development of hypertension. However, the mechanism by which salt triggers kidney damage is poorly understood. Our study investigated how high salt (HS) intake triggers early renal injury by considering the ‘gut-kidney axis’. We fed mice 2% NaCl in drinking water continuously for 8 weeks to induce early renal injury. We found that the ‘quantitative’ and ‘qualitative’ levels of the intestinal microflora were significantly altered after chronic HS feeding, which indicated the occurrence of enteric dysbiosis. In addition, intestinal immunological gene expression was impaired in mice with HS intake. Gut permeability elevation and enteric bacterial translocation into the kidney were detected after chronic HS feeding. Gut bacteria depletion by non-absorbable antibiotic administration restored HS loadinginduced gut leakiness, renal injury and systolic blood pressure elevation. The fecal microbiota from mice fed chronic HS could independently cause gut leakiness and renal injury. Our current work provides a novel insight into the mechanism of HS-induced renal injury by investigating the role of the intestine with enteric bacteria and gut permeability and clearly illustrates that chronic HS loading elicited renal injury and dysfunction that was dependent on the intestine.