http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Ruiqiang Liu (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
-
RF Transceiver Circuit FPGA Program Design and Development
Ruiqiang Liu,Fengmei Gao 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.12
As the communication technology is developing rapidly and the communication system and standard are updated constantly, people proposed the concept that the virtual radio is realized through software to achieve the interconnection among equipment. The paper shows the basic structure and module composition of virtual radio RF front-end, highlighting the key technology for hardware design of the whole RF front-end as well as the FPGA local control logic. The hardware, consisting of FPGA module and its control module, is provided with the relative design of circuit diagram. Moreover, the tests on RF front-end board are presented in the paper, proving that the board has favorable commonality to serve as the RF front-end for receiving and sending of wireless signals in software radio system, being used as wireless access card device and wireless system experiment device, and for building the industrial private communication system.
-
A Basic Study on Regeneration System using Plasma for Diesel Particulate Filter
Ruiqiang Liu(류서강),Jae-Ou Chae(채재우),Yong-Hwan Kwak(곽용환),Xinhong Chen(진신홍) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Diesel Particulate Filter (DPF) is the most widely used method to control particulate emissions of diesel engine these days. However, DPF needs periodical regeneration because of soot deposition. Electric discharge plasma, with its strong oxidation characteristics can be utilized in the regeneration process even at lower exhaust temperatures, and the present study also confirmed that the regeneration of DPF was realized when the temperature was elevated from 200℃. Plasma oxidizes NO in the exhaust to NO<SUB>2</SUB> and NO<SUB>2</SUB> in turn oxidizes soot in presence of oxygen to release CO and CO<SUB>2</SUB>. The advantage with plasma regeneration is it proceeds at a lower temperature at which no damage to DPF can happen. Initial experiments were conducted on optimizing NO oxidation to NO<SUB>2</SUB> using plasma reactor. In the next step, regeneration of DPF was carried out. Different parameters such as applied high voltage and gas temperature are studied.
-
Characterization of the B cell receptor repertoire of patients with acute coronary syndrome
Weng Ruiqiang,Liu Sudong,Gu Xiaodong,Zhong Zhixiong 한국유전학회 2022 Genes & Genomics Vol.44 No.1
Background: Acute coronary syndrome (ACS) is a complex cardiovascular disease whose development involves the dysregulation of adaptive immune responses. Though it has been proven that T cells associate with inflammation in the development of ACS, the function of B cells in disease remains unclear. Objective: The aim of this study was to reveal the diversity of the B cell receptor (BCR) repertoire of patients with ACS. Methods: We conducted a pilot study to sequence the immune repertoire of peripheral blood mononuclear cells (PBMCs) from patients with ACS, including acute myocardial infarction (AMI) and unstable angina (UA), and quantitatively characterized BCR repertoires by bioinformatics analysis. Results: We found that patients with AMI and UA had lower BCR repertoire diversity compared with controls with normal coronary arteries (NCA). Lower percentages of productive unique BCR nt sequences and higher percentages of top 200 unique BCR sequences were identified in AMI and UA patients than NCA controls. Patients had various preferential usage of V and J genes from B cell clones in accordance with the disease severity of coronary arteries. AMI patients had distinct CDR3 amino acids, and their frequency differed among patients with ACS. Conclusions: Our results indicate that differential BCR signatures represent an imprint of distinct repertoires among ACS patients. This study thereby opens up the prospect of studying disease-relevant B cells to better understand and treat ACS.
-
Jihui Yao,Jiapeng Jiao,Ruiqiang Liu,Fei Zha,Xiaojun Guo,Xiaohua Tang,Haifeng Tian,Yue Chang 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.7
To improve the dispersion of metals and to enhance the catalytic performance of SAPO-34 molecular sieves, the template-assisted method was applied to synthesize Co, Ni and Zn modified SAPO-34 molecular sieves by using palygorskite as silicon source and tetraethylammonium hydroxide as template. The metal modified SAPO-34 molecular sieves were characterized by XRD, SEM, XPS, N2-adsorption-desorption, NH3-TPD, FTIR, ICP-AES and TG. The N atoms of tetraethylammonium hydroxide exhibited the different forces to three metal ions, thus the acidity of the molecular sieves was further regulated. Compared with metal modified SAPO-34 molecular sieves prepared by impregnation, metal modified SAPO-34 molecular sieves prepared by template-assisted maintained higher surface area, bigger pore volume and better dispersion of metals. The catalytic performance of metal modified SAPO-34 molecular sieves prepared by template-assisted method in the reaction of methanol-to-olefins (MTO) was investigated in the fixed bed reactor. Under the reaction conditions that the reaction temperature was 400 oC, the reaction pressure was 0.1 MPa, the feed WHSV was 2.0 h1 and the mass of catalyst was 0.5 g, Ni modified SAPO-34 molecular sieves exhibited great methanol conversion and high selectivity to light olefins. The selectivity of light olefins reached 95.7%.
-
Zihao Chen,Lei He,Lijun Huang,Zhongyu Liu,Jianwen Dong,Bin Liu,Ruiqiang Chen,Liangming Zhang,Peigen Xie,Limin Rong 대한척추신경외과학회 2022 Neurospine Vol.19 No.1
Objective: A post hoc subgroup analysis of prospectively collected data from a randomized controlled trial was conducted to identify risk factors related to poor outcomes in patients who underwent minimally invasive discectomy. Methods: Patients were divided into satisfied and dissatisfied subgroups based on Oswestry Disability Index (ODI), visual analogue scale (VAS) back pain score (VAS-back) and leg pain score (VAS-leg) at short-term and midterm follow-up according to the patient acceptable symptom state threshold. Demographic characteristics, radiographic parameters, and clinical outcomes between the satisfied and dissatisfied subgroups were compared using univariate and multivariate analysis. Results: A total of 222 patients (92.1%) completed 2-year follow-up, and the postoperative ODI, VAS-back, and VAS-leg were significantly improved after surgery as compared to preoperatively. Multivariate analysis indicated older age (p = 0.026), lateral recess stenosis (p = 0.046), and lower baseline ODI (p = 0.027) were related to poor short-term functional improvement. Higher baseline VAS-back (p = 0.048) was associated with poor short-term relief of back pain, while absence of decreased sensation (p = 0.019) and far-lateral disc herniation (p = 0.004) were associated with poorer short-term relief of leg pain. Lumbar facet joint osteoarthritis was identified as a risk factor for poor functional improvement (p = 0.003) and relief of back pain (p = 0.031). Disc protrusion (p = 0.036) predicted poorer relief of back pain at midterm follow-up. Conclusion: In this study, several factors were identified to be predictive of poor surgical outcomes following minimally invasive discectomy. (ClinicalTrials.gov number: NCT01997086).
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
