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Qi Fei-Yan,Zhu Zhou-Hai,Li Meng,Guan Ying,Peng Qi-Yuan,Lu She-Ming,Liu Zhi-Hua,Wang Ming-Feng,Miao Ming-Ming,Chen Zhang-Yu,Li Xue-Mei,Bai Jie,Yao Jian-Hua 한국유전학회 2022 Genes & Genomics Vol.44 No.11
Background: Smoking behavior is influenced by multiple genes, including the bitter taste gene TAS2R38. It has been reported that the correlation between TAS2R38 and smoking behavior has ethnicity-based differences. However, the TAS2R38 status in Chinese smokers is still unclear. Objective: This study aims to investigate the possible relationship between genetic variations in TAS2R38 (A49P, V262A and I296V) and smoking behaviors in the Han Chinese population. Methods: The haplotype analyses were performed and smoking behavior questionnaire was completed by 1271 individuals. Genetic association analyses for smoking behavior were analyzed using chi-square test. Further, for investigating the molecular mechanism of TAS2R38 variants effect on smoking behavior, we conducted TAS2R38-PAV and TAS2R38-AVI expression plasmids and tested the cellular calcium assay by cigarette smoke compounds stimulus in HEK293. Results: Significant associations of genetic variants within TAS2R38 were identified with smoking behavior. We found a higher PAV/PAV frequency than AVI/AVI in moderate and high nicotine dependence (FTND ≥ 4; X2 = 4.611, 1 df, p = 0.032) and strong cigarette smoke flavor intensity preference (X2 = 4.5383, 1 df, p = 0.033) in participants. Furthermore, in the in vitro cellular calcium assay, total particle matter (TPM), N-formylnornicotine and cotinine, existing in cigarette smoke, activated TAS2R38-PAV but not TAS2R38-AVI-transfected cells. Conclusion: Our data highlights that genetic variations in TAS2R38 are related to smoking behavior, especially nicotine dependence and cigarette smoke flavor intensity preference. Our findings may encourage further consideration of the taste process to identify individuals susceptible to nicotine dependence, particularly Han Chinese smokers.
A Study on the Design of a Gear Transmission Error Test Rig
Qi Zhang(장기),Jing Zhang(장정),Hou-Ling Yan(연후링),Qing-Wang Zhu(주징왕),Zhe-zhu Xu(허철수),Sung-Ki Lyu(류성기) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.1
Transmission error (TE) is the most important cause of gear noise and vibration because TEs affect the changes of the force and the speed of gears. TE is usually expressed as an angular deviation, or a linear deviation measured at the pitch point and calculated at successive positions of the pinion as it goes through the meshing cycle. Accurate measurement of TE for gear transmission will provide a reasonable basis for gear design, manufacturing processes and quality control. Therefore, in order to study the accuracy of the gear transmission, stability, TE, vibration and noise after gear micro-geometry modification, a gear transmission test rig is proposed in this paper, which is based on the existing technical conditions, by using reasonable testing methods, hardware and a signal processing method. All of the details and the experience can be taken into consideration in the next upgraded test rig.
Numerical Modeling of Creep Degradation of Natural Soft Clays under One-dimensional Condition
Qi-Yin Zhu,Zhen-Yu Yin,Dong-Mei Zhang,Hongwei Huang 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.5
Creep degradation is a common phenomenon of natural soft clays. This paper focuses on developing a one-dimensional constitutive model considering the influence of bond degradation on the creep behavior for natural soft clays. First, conventional oedometer creep tests are studied and a creep based structure indicator ϖ denoting the difference between the creep coefficient of the reconstituted samples and that of intact samples is proposed. Then, the creep coefficient of intact clay is formulated by this indicator and the intrinsic creep coefficient corresponding to reconstituted clay. This formula is then incorporated into a one-dimensional creep model to describe the creep degradation behavior induced by bond degradation. The model parameters can be determined in a straightforward way from oedometer tests which leads to an easy application of the model for practice. Furthermore, coupled with the consolidation theory, the model is used to simulate oedometer tests at constant strain rate as well as long-term creep tests on sensitive Batiscan clay. The destructuration effects on the evolution of creep coefficient are analyzed. The comparisons between experimental and numerical results show that the proposed model can precisely describe the creep degradation behavior induced by destructuration of natural soft clay under one-dimensional loading.
REVIEW : Dose Endoscopic Ultrasonography Impact Diagnosis of Intestinal Diseases?
( Qi Zhu ),( Chao Xu ),( Duanmin Hu ) 대한장연구학회 2011 Intestinal Research Vol.9 No.3
Substantial development in equipment such as miniprobe endosonography and enteroscopy has made it possible to use endoscopic ultrasonography (EUS) to detect any part of the digestive tract. EUS plays a vital role in evaluating a lower intestinal malignancy, particularly rectal cancer, to determine whether the disease is localized (T1-2, N0) and appropriate for surgery or locally advanced (T any, N1-2) and would benefit from preoperative neoadjuvant chemoradiation. Moreover, follow-up by EUS may contribute to early recognition of focal tumor recurrence, particularly for lesions that cannot be detected by other imaging modalities. EUS is also an invaluable modality for diagnosing intestinal submucosal tumors, such as gastrointestinal stromal tumors, lipomas, lymphangiomas, leiomyomas, carcinoids, and others such as intestinal endometriosis. Although a definite diagnosis of a submucosal tumor is generally confirmed by cytology or histology results, EUS-guided fine needle aspiration or core biopsy is a fairly helpful practice. EUS is also useful for discriminating between Crohn`s disease and ulcerative colitis as well as assessing disease severity. Moreover, it has emerged as a powerful imaging tool to manage perianorectal diseases. EUS also has the potential to be useful for intra-small intestinal ultrasonography for the diagnosis of small bowel diseases in the future. (Intest Res 2011;9:179-188)
A DoS Detection Method Based on Composition Self-Similarity
( Zhu Jian-qi ),( Fu Feng ),( Chong-kwon Kim ),( Yin Ke-xin ),( Liu Yan-heng ) 한국인터넷정보학회 2012 KSII Transactions on Internet and Information Syst Vol.6 No.5
Based on the theory of local-world network, the composition self-similarity (CSS) of network traffic is presented for the first time in this paper for the study of DoS detection. We propose the concept of composition distribution graph and design the relative operations. The (R/S)d algorithm is designed for calculating the Hurst parameter. Based on composition distribution graph and Kullback Leibler (KL) divergence, we propose the composition self-similarity anomaly detection (CSSD) method for the detection of DoS attacks. We evaluate the effectiveness of the proposed method. Compared to other entropy based anomaly detection methods, our method is more accurate and with higher sensitivity in the detection of DoS attacks.
Online condition monitoring for DC‑link capacitors of motor drives under noise interference
Qi Zhu,Jin Zhao,Yujin Song,Yang Zhou,Jiajiang Sun 전력전자학회 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.7
In this paper, a capacitance estimation method based on the recursive least squares (RLS) algorithm is proposed for the condition monitoring of the dc-link capacitors in motor drive systems. When a system is operating in the regenerative mode, the capacitance can be estimated online without the need for hardware modifications. The ratio of the current integral to the voltage increase is used to estimate the capacitance. In addition, the influences of the dead-time and pulse dropping on calculating current integral are analyzed. To deal with noise interference in voltage measurement, the RLS algorithm with outlier detection is used to achieve robust capacitance estimation. In view of the limited amount of data in the regenerative mode, the standard deviation of the error was estimated and a reasonable threshold was set according to the accuracy requirement to remove a part of the estimated value with a large error, which improves the reliability of the estimated results. Simulation and experimental results show the effectiveness of this method.
Zhu, Yu,Zhang, Ling,Zhang, Guo-Dong,Wang, Hong-Ou,Liu, Ming-Yan,Jiang, Yuan,Qi, Li-Sha,Li, Qi,Yang, Ping Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.19
Glioma is one of the most common tumors in China and chemotherapy is critical for its treatment. Recent studies showed that benzyl isothiocyanate (BITC) could inhibit the growth of glioma cells, but the mechanisms are not fully understood. This study explored the inhibitory effect of BITC on invasion and angiogenesis of U87MG human glioma cells in vitro and in vivo, as well as potential mechanisms. It was found that BITC could inhibit invasion and angiogenesis of human glioma U87MG cells by inducing cell cycle arrest at phase G2/M. It also was demonstrated that BITC decreased expression of cyclin B1, p21, MMP-2/9, VE-cadherin, CD44, CXCR4 and MTH1, the activity of the telomerase and $PKC{\zeta}$ pathway. Microarray analysis was thus useful to explore the potential target genes related to tumorigenic processes. BITC may play important roles in the inhibition of invasion and angiogenesis of human glioma cells.