A New Type of CPPM Machine with Stator Axial Magnetic Ring

Xie, Kun,Li, Xinhua,Ma, Jimin,Wu, Xiaojiang,Yi, Hong,Hu, Gangyi The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.3

This paper proposes a new type of consequent-pole permanent-magnet (CPPM) machine with stator axial magnetic ring that increases torque capability over a wide speed range and enhances efficiency for the built-in rare-earth permanent magnet synchronous machine used in new energy vehicles. The excitation winding of the CPPM hybrid excitation synchronous machine in the stator is replaced by ferrite magnetic ring to simplify the structure and manufacturing process of the machine. The basic structure and magnetic regulation principle of the proposed machine are introduced and compared with the traditional interior rare-earth permanent magnet synchronous machine and CPPM hybrid excitation synchronous machine. Finally, experimental results of a new type of CPPM synchronous motor prototype with axial magnetic ring are introduced in the paper.

A New Type of CPPM Machine with Stator Axial Magnetic Ring

Kun Xie,Xinhua Li,Jimin Ma,Xiaojiang Wu,Hong Yi,Gangyi Hu 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.3

This paper proposes a new type of consequent-pole permanent-magnet (CPPM) machine with stator axial magnetic ring that increases torque capability over a wide speed range and enhances efficiency for the built-in rare-earth permanent magnet synchronous machine used in new energy vehicles. The excitation winding of the CPPM hybrid excitation synchronous machine in the stator is replaced by ferrite magnetic ring to simplify the structure and manufacturing process of the machine. The basic structure and magnetic regulation principle of the proposed machine are introduced and compared with the traditional interior rare-earth permanent magnet synchronous machine and CPPM hybrid excitation synchronous machine. Finally, experimental results of a new type of CPPM synchronous motor prototype with axial magnetic ring are introduced in the paper.

DERIVED FROM INTERACTION: DEVELOPING A CUSTOMER ENGAGEMENT MODEL IN WELLNESS TOURISM

Lishan Xie,Xinhua Guan,Yingxin He,Tzung-Cheng (TC) Huan 글로벌지식마케팅경영학회 2018 Global Marketing Conference Vol.2018 No.07

To investigate the value co-creation process in wellness tourism, this study constructed a structural equation model of customer interactions with (1) the environment, (2) service employees, and (3) other customers relating to customer-perceived value and customer engagement. Empirical data were collected from 528 survey respondents who were at wellness tourism resorts. The results reveal that all three types of interaction have positive effects on customer-perceived value, and that perceived value positively affects customer engagement. Based on this finding, management recommendations for wellness tourism service enterprises are given.

A New Type of CPPM Synchronous Machine with Stator Axial Magnetic Ring

Kun Xie,Xinhua Li,Jimin Ma,Xiaojiang Wu,Hong Yi,Gangyi Hu 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.3

This paper proposes a new type of consequent-pole permanent-magnet (CPPM) machine with stator axial magnetic ring that increases torque capability over a wide speed range and enhances efficiency for the built-in rare-earth permanent magnet synchronous machine used in new energy vehicles. The excitation winding of the CPPM hybrid excitation synchronous machine in the stator is replaced by ferrite magnetic ring to simplify the structure and manufacturing process of the machine. The basic structure and magnetic regulation principle of the proposed machine are introduced and compared with the traditional interior rare-earth permanent magnet synchronous machine and CPPM hybrid excitation synchronous machine. Finally, experimental results of a new type of CPPM synchronous motor prototype with axial magnetic ring are introduced in the paper.

Aromatic polyketides from a sponge-derived fungus Metarhizium anisopliae mxh-99 and their antitubercular activities

Xianglan Kong,Xinhua Ma,Yunying Xie,Shengxin Cai,Tianjiao Zhu,Qian Qun Gu,De-Hai Li 대한약학회 2013 Archives of Pharmacal Research Vol.36 No.6

In our screening for antitubercular agents, fivenaphtho-c-pyrones including two new naphtho-c-pyronesglycosides, indigotides G and H (1 and 2), and two diphenylethers were isolated from the extract of a sponge-derivedfungus Metarhizium anisopliae mxh-99. Their structureswere established on the basis of chemical and spectroscopicevidence. The antitubercular activities of all the compoundswere evaluated against Mycobacterium phlei. The knownisochaetochromin B2 (6) and ustilaginoidin D (7) exhibitedthe highest activity with MICs 50.0 lg/mL.

Theoretical and Experimental study on Attosecond high-order Harmonics Radiation at SIOM

Ruxin Li,Xinhua Xie,Zhinan Zeng,Zhizhan Xu 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.44 No.32

Phase-matched high-order harmonic generation in an Ar gas-lled cell was investigated experimentally. We found that the spatial prole of high-order harmonics under the phase-matching condition was quite dierent from that of the phase-mismatching case. Also, the scheme of highintensity attosecond high-order harmonic generation driven by a synthesized laser eld is proposed. This new scheme provides a possible approach for producing a high-energy attosecond XUV pulse, which is useful for nonlinear attosecond spectroscopy.

Fabrication Tolerance of InGaAsP/InP-Air-Aperture Micropillar Cavities as 1.55-μm Quantum Dot Single-Photon Sources

Shuai Huang,Xiumin Xie,Qiang Xu,Xinhua Zhao,Guangwei Deng,Qiang Zhou,You Wang,Hai-Zhi Song 한국광학회 2020 Current Optics and Photonics Vol.4 No.6

A practical single photon source for fiber-based quantum information processing is still lacking. As a possible 1.55-µm quantum-dot single photon source, an InGaAsP/InP-air-aperture micropillar cavity is investigated in terms of fabrication tolerance. By properly modeling the processing uncertainty in layer thickness, layer diameter, surface roughness and the cavity shape distortion, the fabrication imperfection effects on the cavity quality are simulated using a finite-difference time-domain method. It turns out that, the cavity quality is not significantly changing with the processing precision, indicating the robustness against the imperfection of the fabrication processing. Under thickness error of ±2 nm, diameter uncertainty of ±2%, surface roughness of ±2.5 nm, and sidewall inclination of 0.5°, which are all readily available in current material and device fabrication techniques, the cavity quality remains good enough to form highly efficient and coherent 1.55-µm single photon sources. It is thus implied that a quantum dot contained InGaAsP/InP-air-aperture micropillar cavity is prospectively a practical candidate for single photon sources applied in a fiber-based quantum information network.

Synthesis of 1-benzoylpyrene using silica-supported phosphotungstic heteropoly acid as an efficient and reusable catalyst

Minqiang He,Min Chen,Aixia Pan,Jimin Xie,Huamin Li,Xinhua Yuan,Xiaonong Cheng 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.10

A novel one-pot catalytic synthesis of 1-benzoylpyrene through acylation of pyrene with benzoic anhydride catalyzed by several heteropoly acids (HPAs) was investigated. Pure 1-benzoylpyrene was obtained and its structure was identified by GC/MS, FT-IR and 1H NMR spectra. Silica-supported phosphotungstic heteropoly acid (PW/SiO2)was found to be the most active catalyst in the acylation. The yield and the selectivity of 1-benzoylpyrene were up to 62.5% and 100%, respectively. The effects of experimental parameters on the catalytic acylation reaction, and the possibility of reusability of PW/SiO2 catalyst were studied. PW/SiO2 catalyst is easily separable from the reaction mixture and reusable without loss of its activity.

Score for the Survival Probability in Metastasis Breast Cancer: A Nomogram-Based Risk Assessment Model

Zhenchong Xiong,Guangzheng Deng,Xinjian Huang,Xing Li,Xinhua Xie,Jin Wang,Zeyu Shuang,Xi Wang 대한암학회 2018 Cancer Research and Treatment Vol.50 No.4

Purpose Survival of metastatic breast cancer (MBC) patient remains unknown and varies greatly from person to person. Thus, we aimed to construct a nomogram to quantify the survival probability of patients with MBC. Materials and Methods We had included 793 MBC patients and calculated trends of case fatality rate by Kaplan- Meier method and joinpoint regression. Six hundred thirty-four patients with MBC between January 2004 and July 2011 and 159 patients with MBC between August 2011 and July 2013 were assigned to training cohort and internal validation cohort, respectively. We constructed the nomogram based on the results of univariable and multivariable Cox regression analyses in the training cohort and validated the nomogram in the validation cohort. Concordance index and calibration curves were used to assess the effectiveness of nomogram. Results Case fatality rate of MBC was increasing (annual percentage change [APC], 21.6; 95% confidence interval [CI], 1.0 to 46.3; p < 0.05) in the first 18 months and then decreased (APC, 4.5; 95% CI, 8.2 to 0.7; p < 0.05). Metastasis-free interval, age, metastasis location, and hormone receptor status were independent prognostic factors and were included in the nomogram, which had a concordance index of 0.69 in the training cohort and 0.67 in the validation cohort. Calibration curves indicated good consistency between the two cohorts at 1 and 3 years. Conclusion In conclusion, the fatality risk of MBC was increasing and reached the summit between 13th and 18th month after the detection of MBC. We have developed and validated a nomogram to predict the 1- and 3-year survival probability in MBC.

Lack of Association Between the Matrix Metalloproteinase-2 -1306C>T Polymorphism and Breast Cancer Susceptibility: a Meta-analysis

Yang, Lu,Li, Ning,Wang, Siyu,Kong, Yanan,Tang, Hailin,Xie, Xinhua,Xie, Xiaoming Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.12

Background: Since inconsistent results have been reported regarding the relation between the matrix metalloproteinase-2 (MMP-2) -1306C>T polymorphism and susceptibility for breast cancer, we performed a meta-analysis to investigate the issue. Materials and Methods: An internet search of PubMed and EMBASE was performed to identify eligible studies. Pooled odds ratios (ORs) with their corresponding confidence intervals (CIs) were calculated to evaluate any association between MMP-2 -1306C>T polymorphism and breast cancer susceptibility. Results: Nine case-control studies were included in the meta-analysis, involving 9,858 cases and 10,871 controls. Overall, there was no evidence of any association between the MMP-2 -1306C>T polymorphism and breast cancer susceptibility in different genetic models (T-allele vs C-allele: OR=0.95, 95%CI, 0.82-1.10, p=0.49; TT vs CC: OR=1.03, 95%CI, 0.90-1.19, p=0.66; TT+TC vs CC: OR=0.93, 95%CI, 0.78-1.10, p=0.38; TT vs TC+CC: OR=1.02, 95%CI, 0.89-1.17, p=0.77). In the subgroup analysis by ethnicity, CC was associated with a significant increase in breast susceptibility among Latin-Americans in the dominant model (OR=0.61, 95%CI, 0.40-0.93, p=0.02), but the association disappeared in other models. No significant association was observed among Europeans, East Asians and others in different genetic models. In the subgroup analysis by their source of controls, no significant association between MMP-2 -1306C>T polymorphism and breast cancer susceptibility was noted among population-based studies and hospital-based studies in different genetic models. Conclusions: The results of this meta-analysis suggest that MMP-2 -1306C>T polymorphism is not associated with breast cancer susceptibility, although the association among Latin-Americans in the dominant model was significant.