Analysis and Design Optimization of Axial–Radial Flux Hybrid Excitation Permanent Magnet Eddy Current Coupling

Zhang Hongming,Liu Chengcheng,Zhang Shiwei,Wang Youhua,Lei Gang,Zhu Jianguo 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.6

This paper proposes an axial–radial flux hybrid excitation permanent magnet eddy current coupling (HE-PMEC), where the ferrite magnet is employed for producing the radial flux and the DC excitation current is adopted for producing the axial flux. Moreover, a shielding layer is developed to regulate the radial magnetic field. Its magnetic field distribution, electromagnetic performance, and temperature distribution are calculated based on the 3D finite element method (FEM). By adjusting the applied DC excitation current density and the insertion depth of the shielding layer, the variable current starting process, the variable current braking process, and the speed regulation characteristic of the proposed HE-PMEC are obtained. It can be seen that the starting process, braking process, and speed regulation ability of the HE-PMEC have been enhanced greatly. Furthermore, the copper ring shape of the HE-PMEC is optimized by using the proposed improved multilevel optimization method. It can be seen that the performance of the HE-PMEC can be improved by using the new optimized copper ring shape. Lastly, compared with the conventional PMECs, the proposed HE-PMEC has shown its superior electromagnetic performance.

Dirac semimetal-enabled multi-bit coding metasurface for dynamic manipulation of terahertz beams

Zhang Yonggang,Yin Kehao,Liang Lanju,Yao Haiyun,Yan Xin,Hu Xiaofei,Huang Chengcheng,Qiu Fu,Zhang Rui,Li Yuanping,Wang Yaru,Li Zhenhua,Wang Ziqun 한국물리학회 2024 Current Applied Physics Vol.58 No.-

In this study, a switchable multi-bit coding metasurface that is applied under a terahertz (THz) frequency by adjusting the Fermi level (EF) of Dirac semimetals (DSMs) is proposed. At a EF of 0.2 eV, a 1-bit coding metasurface can be applied in the 2.58–2.62 THz. At 0.3 eV, a 3-bit coding metasurface is realized at 1.88 THz, and at 0.05 eV, the phase of the coding units coincides in the 1.5–3 THz. So, different functions of the metasurface can be realized. The proposed coding metasurfaces has promising applications in terahertz communication.

New approach for detecting a compressed bino/wino at the LHC

Han, Chengcheng,Wu, Lei,Yang, Jin Min,Zhang, Mengchao,Zhang, Yang American Physical Society 2015 PHYSICAL REVIEW D - Vol.91 No.5

Molecular Characteristics and Potent Immunomodulatory Activity of Fasciola hepatica Cystatin

Kai Zhang,Yucheng Liu,Guowu Zhang,Xifeng Wang,Zhiyuan Li,Yunxia Shang,Chengcheng Ning,Chunhui Ji,Xuepeng Cai,Xianzhu Xia,Jun Qiao,Qingling Meng 대한기생충학ㆍ열대의학회 2022 The Korean Journal of Parasitology Vol.60 No.2

Cystatin, a cysteine protease inhibitor found in many parasites, plays important roles in immune evasion. This study analyzed the molecular characteristics of a cystatin from Fasciola hepatica (FhCystatin) and expressed recombinant FhCystatin (rFhcystatin) to investigate the immune modulatory effects on lipopolysaccharide-induced proliferation, migration, cytokine secretion, nitric oxide (NO) production, and apoptosis in mouse macrophages. The FhCystatin gene encoded 116 amino acids and contained a conserved cystatin-like domain. rFhCystatin significantly inhibited the activity of cathepsin B. rFhCystatin bound to the surface of mouse RAW264.7 cells, significantly inhibited cell proliferation and promoted apoptosis. Moreover, rFhCystatin inhibited the expression of cellular nitric oxide, interleukin-6, and tumor necrosis factor-α, and promoted the expression of transforming growth factor-β and interleukin-10. These results showed that FhCystatin played an important role in regulating the activity of mouse macrophages. Our findings provide new insights into mechanisms underlying the immune evasion and contribute to the exploration of potential targets for the development of new drug to control F. hepatica infection.

중국 기업 구성원의 감성지능, 심리적 주인의식, 일의 의미가 제언행동에 미치는 영향에 관한 연구: 직무열의의 매개효과를 중심으로

ZHANG, RUI,Sun, QiYuan,SHA, CHENGCHENG 부산대학교 중국연구소 2023 Journal of China Studies Vol.26 No.1

With technological development and environmental changes, the resources owned by companies and organizations have been equalized, and the competitive advantage of existing resources has lost relative importance. In this way, companies and organizations must secure excellent talents to secure a continuous competitive advantage. However, in Chinese current human resource management method, the traditional way of simply exchanging goods and services is insufficient to induce voluntary commitment of members, and for those companies and organizations with limited resources, it is difficult to give employees a satisfactory allocation of resources. Therefore, this study aims to explore a method to enhance job enthusiasm that can lead to voluntary commitment of members. As such, this study is to first verify whether the emotional intelligence, psychological ownership, and meaning of work of members of the organization affect job engagement. Next, it is intended to verify whether job engagement affects voice behavior. Finally, it is necessary to understand whether work enthusiasm has mediating effect among emotional intelligence, psychological ownership, meaning of work and voice behavior. Therefore, a self-report survey was conducted on members working in Chinese companies in this study, with a total of 395 copies of the collected questionnaire. SPSS V.22.0 and AMOS V.22.0 statistical software were used for empirical analysis, and other analysis techniques such as frequency analysis, exploratory factor analysis, reliability analysis, confirmatory factor analysis, correlation analysis, structural equation model and other analysis methods were also used. The results of this study can be summarized as follows. First, emotional intelligence, psychological ownership, and the meaning of work have a positive (+) effect on job engagement. Second, job engagement has a positive (+) effect on voice behavior. Third, psychological ownership has a positive (+) effect on voice behavior. Fourth, job engagement has a mediating effect among emotional intelligence, psychological ownership, meaning of work and voice behavior.

Multiphysical Design and Optimization of High-Speed Permanent Magnet Synchronous Motor with Sinusoidal Segmented Permanent Magnet Structure

Liu Chengcheng,Zhang Hongming,Wang Shaoheng,Wang Youhua,Lei Gang,Zhu Jianguo 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.3

High speed permanent magnet synchronous motor (HSPMSM) is an important driving motor for electric vehicles. Compared with the electric motor operated under normal speed, it is critical to reduce the torque ripple, vibration, and noise of the HSPMSM. Furthermore, The air-gap fux density total harmonic distortion and electromotive force total harmonic distortion determine by torque performance and vibration noise. This article uses analytical methods to analyze the infuence of permanent magnet sinusoidal segmentation (PMS) on the electromagnetic performance of surface-mounted HSPMSM. The fnite element method is used to calculate the infuence of diferent permanent magnet segmentation numbers, diferent adjacent permanent magnet decreasing thickness, and diferent center PM width on the electromagnetic performance of permanent magnet sinusoidal segmented surface-mounted high-speed permanent magnet synchronous motor (M2). Comparing the efectiveness of PMS in surface-mounted HSPMSM and interior HSPMSM. Furthermore, the rotor dynamics analysis and vibration noise analysis on M2 are performed, and the infuence of PMS on the stress and vibration noise of both motors’ rotors is summarized. This article proposes a parameter preprocessing grouping multiphysical multi-objective high-dimensional multilevel optimization method. Taking M2 as an example, a global optimization design was carried out for the high-dimensional structural parameters brought by PMS, which improved the electromagnetic performance of M2 and reduced the vibration noise and rotor stress.

Top-squark in natural SUSY under current LHC run-2 data

Han, Chengcheng,Ren, Jie,Wu, Lei,Yang, Jin Min,Zhang, Mengchao Springer-Verlag 2017 European Physical Journal C Vol.77 No.2

<P>We utilize the recent LHC-13 TeV data to study the lower mass bound on the top-squark (stop) in natural supersymmetry. We recast the LHC sparticle inclusive search of (>= 1) jets+E-T with alpha(T) variable, the direct stop pair search (1-lepton channel and all-hadronic channel) and the monojet analyses. We find that these searches are complementary depending on stop and higgsino masses: for a heavy stop the all-hadronic stop pair search provides the strongest bound, for an intermediate stop the inclusive SUSY analysis with alpha(T) variable is most efficient, while for a compressed stop-higgsino scenario the monojet search plays the key role. Finally, the lower mass bound on a stop is: (1) 320 GeV for compressed stop-higgsino scenario (mass splitting less than 20 GeV); (2) 765 (860) GeV for higgsinos lighter than 300 (100) GeV.</P>

Preparation of Well-Dispersed Nanosilver in MIL-101(Cr) Using Double-Solvent Radiation Method for Catalysis

SHUQUAN CHANG,Chengcheng Liu,Heliang Fu,Zheng Li,Xian Wu,Jundong Feng,Haiqian Zhang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.12

In this study, a double-solvent radiation method is proposed to prepare silver nanoparticles in the pores of metal-organic framework MIL-101(Cr). The results reveal that well-dispersed silver nanoparticles with a diameter of about 2 nm were successfully fabricated in the cages of monodisperse octahedral MIL-101(Cr) with a particle size of about 400 nm. The structure of MIL-101(Cr) was not destroyed during the chemical treatment and irradiation. The resulting Ag/MIL-101 exhibits excellent catalytic performance for the reduction of 4-nitrophenol. This method can be extended to prepare other single or bimetallic components inside porous materials.

중국 직장인 학습자의 긍정적 정서, 열정, 잡 크래프팅이 직무만족도에 미치는 영향에 관한 연구: 직장인의 조직학습활동의 매개효과를 중심으로

Sun, QiYuan,ZHANG, RUI,SHA, CHENGCHENG 부산대학교 중국연구소 2023 Journal of China Studies Vol.26 No.2

To properly respond to new and complex situations in the work environment, lifelong learning activities related to work have recently been emphasized for office workers in that the ability to modify the knowledge and skills acquired through learning and adapt to such changes are required. In this respect, it is important to study the learning activities of office worker learners in the organization. In particular, it is difficult to find studies on lifelong learning of office workers in China. Therefore, this study takes Chinese office workers as the object to explore the role of learning activities within organizations, to examine how positive emotion, passion, and job crafting are related to organizational learning activities, how organizational learning activities are related to learners' job satisfaction, and the mediating effect of organizational learning activities among learners' positive emotion, passion, job crafting and job satisfaction. To this end, a total of 487 effective questionnaires were collected from Chinese office workers who had participated in organizational learning activities. SPSSV.22.0 and AMOSV.22.0 were used for frequency analysis, and empirical analysis, reliability analysis, exploratory factor analysis, correlation analysis, confirmatory factor analysis, structural equation model and other methods were used. According to the results, first, the positive emotion, passion, and job crafting of Chinese members have a positive (+) effect on organizational learning activities. Second, organizational learning activities of Chinese members have a positive (+) effect on job satisfaction. Third, it has a mediating effect between positive emotions and job satisfaction. Fourth, it has a mediating effect between passion and job satisfaction. Fifth,it also has a mediating effect between job crafting and job satisfaction.

Clinicopathological Analysis and Treatment of Adult Patients with Inflammatory Myofibroblastic Tumor: A 15-Year Single- Center Study

Xin Liu,Chengcheng Gong,Jieyun Zhang,Wanjing Feng,Yanjing Guo,Youzhou Sang,Chunmeng Wang,Yong Chen,Jian Wang,Lin Yu,Xiaowei Zhang,Zhiguo Luo 대한암학회 2023 Cancer Research and Treatment Vol.55 No.3

Purpose Inflammatory myofibroblastic tumor (IMT) is a rare mesenchymal malignancy that occurs primarily in children and adolescents. The clinical and pathological features of IMT in adult patients are not well understood.Materials and Methods We retrospectively searched for records of adult patients with IMT at Fudan University Shanghai Cancer Center from 2006 to 2021. Clinicopathological data, treatments, and outcomes were collected and analyzed.Results Thirty adult patients with IMT, mostly women (60.0%), were included. The median age of the patients was 38 (21-77). The most common primary site was abdominopelvic region (53.3%), followed by lungs (20.0%). Seven patients had an abdominal epithelioid inflammatory myofibroblast sarcoma (EIMS). The positivity rate of anaplastic lymphoma kinase (ALK) was 81.5% (22/27). Sixteen patients with advanced ALK-positive disease received crizotinib, with an objective response rate (ORR) of 81.3% and a disease control rate of 87.5%. The median progression-free survival was 20.8 months. EIMS was associated with more aggressive behavior; however, the prognosis was similar to that of non-EIMS patients after treatment with an ALK inhibitor. At a median follow-up time of 30 months (95% confidence interval [CI], 13.6 to 46.4), the 5-year overall survival was 77% (95% CI, 66 to 88) in all patients.Conclusion Adult IMTs appeared more aggressive, with a higher incidence of recurrence and metastases, and patients with EIMS had more aggressive cases. Treatment with ALK inhibitors resulted in a high ORR and a durable response, which suggested that ALK inhibitors could be used as a first-line treatment option in adult patients with ALK-positive advanced IMT.