http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Modeling and analysis of a rotational piezoelectric energy harvester with limiters
Xiaobo Rui,Zhoumo Zeng,Yibo Li,Yu Zhang,Zi Yang,Xinjing Huang,Zhou Sha 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.11
A rotational piezoelectric energy harvester has the ability to convert rotation mechanical energy into electric power. The piezoelectric harvester with cantilever based on gravity excitation has received great attention. Given that gravity excitation is greater than conventional vibration excitation, and large mass are often used in low-frequency applications, large amplitudes pose a significant threat to the life of a harvester. In this study, a rotational energy harvester with limiters is investigated to promote practical development. This study establishes a theoretical model verified by experiments. Results show that stiffness has little influence on the limiting effect. In the experimental conditions, the output after 2000 N/m is basically the same. The peak value of the output voltage is linearly proportional to the space. Given that an impact excitation is generated in the collision, the limiter widens the frequency band of the output in the upsweep.
BiFeO3 Thickness Dependence of the Exchange Bias in Polycrystalline BiFeO3/NiFe Bilayers
Xiaobo Xue,Biao You,Wenbing Rui,Wei Zhang,Jun Du,Xueyong Yuan,Qingyu Xu 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
A clear exchange bias has been observed at room temperature in a series of BiFeO3(t)/NiFe(3.6nm) bilayers, in which the BiFeO3 layers are single-phase polycrystalline with t varied from 8 nmto 240 nm. With increasing t, both the exchange bias field (HE) and the coercivity (HC) increasesharply and approach maxima when t is about 40 nm, which is close to one half the spin cycloidalmodulation period (64 nm) of the bulk BiFeO3 material. The oscillatory variations of HE and HCwith the BiFeO3 layer thickness suggest that the cycloidal spin structure may exist in polycrystallineBiFeO3 thin films. The angular dependence of the exchange bias exhibits collinear unidirectionaland uniaxial anisotropies in the present BiFeO3/NiFe bilayers.
Han Xiao,Xiaobo Fan,Rui Zhang,Guoqiu Wu 대한암학회 2021 Cancer Research and Treatment Vol.53 No.2
Purpose An effective biomarker for the diagnosis of breast cancer (BC) and benign breast diseases (BBD) is crucial for improving the prognosis. We investigated whether N6-methyladenosine (m6A) can be a diagnostic biomarker of BC.Materials and Methods We detected the contents of peripheral blood m6A in 62 patients with BC, 41 patients with BBD, and 41 normal controls (NCs) using the colorimetric method. The relative expression of the m6A regulated genes methyltransferase-like 14 (METTL14) and fat mass and obesity-associated (FTO) was analyzed using quantitative real-time polymerase chain reaction.Results m6A in peripheral blood RNA was significantly higher in patients with BC than that in patients with BBD (p < 0.001) or the NCs (p < 0.001). m6A was closely associated with the disease stage (from stage 0 to stage I-IV, p=0.003). The receiver operating characteristic curve of m6A contained an area under the curve (AUC) value of 0.887 in BC, which was greater than that of carcinoembryonic antigen (CEA) or carbohydrate antigen 153 (CA153). The combination of m6A, CEA, and CA153 improved the AUC to 0.914. The upregulated and downregulated mRNA expression of METTL14 and FTO, respectively, might contribute to the increase of m6A in patients with BC. m6A combined with METTL14 and FTO improved the AUC to 0.929 with a specificity of 97.4% in the peripheral blood of patients with BC.Conclusion The peripheral blood RNA of m6A might be a valuable biomarker for the diagnosis of BC.
( Keji Quan ),( Zhuang Zhu ),( Sanjie Cao ),( Fei Zhang ),( Chang Miao ),( Xintian Wen ),( Xiaobo Huang ),( Yiping Wen ),( Rui Wu ),( Qigui Yan ),( Yong Huang ),( Xiaoping Ma ),( Xinfeng Han ),( Qin Z 한국미생물 · 생명공학회 2018 Journal of microbiology and biotechnology Vol.28 No.12
In our previous studies, we have identified several in vivo-induced antigens and evaluated their potential as subunit vaccine candidates in a murine model, in which the recombinant protein GalT showed the most potent immunogenicity and immunoprotective efficacy against Actinobacillus pleuropneumoniae. To exploit a more efficient way of delivering GalT proteins, in this study, we employed the widely studied E. coli outer membrane vesicles (OMVs) as a platform to deliver GalT protein and performed the vaccine trial using the recombinant GalTOMVs in the murine model. Results revealed that GalT-OMVs could elicit a highly-specific, IgG antibody titer that was comparable with the adjuvant GalT group. Significantly higher lymphocyte proliferation and cytokines secretion levels were observed in the GalT-OMVs group. 87.5% and 50% of mice were protected from a lethal dose challenge using A. pleuropneumoniae in active or passive immunization, respectively. Histopathologic and immunohistochemical analyses showed remarkably reduced pathological changes and infiltration of neutrophils in the lungs of mice immunized with GalT-OMVs after the challenge. Taken together, these findings confirm that OMVs can be used as a platform to deliver GalT protein and enhance its immunogenicity to induce both humoral and cellular immune responses in mice.
Chunxia Chai,Qiao Wang,Sanjie Cao,Qin Zhao,Yiping Wen,Xiaobo Huang,Xintian Wen,Qiguai Yan,Xiaoping Ma,Rui Wu 대한수의학회 2018 Journal of Veterinary Science Vol.19 No.1
Japanese encephalitis virus (JEV) is a mosquito-borne, zoonotic flavivirus causing viral encephalitis in humans and reproductive disorder in swine. JEV is prevalent throughout China in human; however, spatiotemporal analysis of JEV in Chinese swine herds has not been reported previously. Herein, we present serological and molecular epidemiological results and estimates of prevalence of JEV infections among swine herds in various regions of China. The results suggest that JEV infections are widespread and genotype I and III strains co-exist in the same regions. Therefore, there is an urgent need to monitor JEV infection status among swine herds in China.