Design analysis and simulation of an external helical gear pump

Jinlong Yang(양진룽),Chenxiao Li(이천효),Ho-Young Jeon(전호영),Chul-Hee Lee(이철희) 유공압건설기계학회 2023 유공압건설기계학회 학술대회논문집 Vol.2023 No.5

A Decupled PQ Control strategy of Voltage - Controlled Inverters

Yang Chen,Jinbin Zhao,Jinlong Wang,Keqing Qu,Shuuichi Ushiki,Masaaki Ohshima 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6

This paper deals with problems caused by high distributed generation penetration and proposes a simple and precise PQ control strategy for voltage-controlled inverters in micro grids. The widely-used current-controlled inverters cannot provide voltage support for micro grids and have to develop seamless transfer strategy between gird connected mode and islanded mode. A voltage-controlled inverter is raised in the paper due to the problems. The new inverter can be regarded as a voltage source cascaded with controllable output impedance. By adopting a new phase-locked loop, the output voltage amplitude and frequency are well decoupled. Thus output active and reactive powers are decoupled satisfactory. The output response is fast and precise. The idea is verified by simulation and experiment results.

Differential Prognostic Implications of Pre- and Post-Stent Fractional Flow Reserve in Patients Undergoing Percutaneous Coronary Intervention

Jinlong Zhang,Doyeon Hwang,Seokhun Yang,Chee Hae Kim,Joo Myung Lee,Chang-Wook Nam,Eun-Seok Shin,Joon-Hyung Doh,Masahiro Hoshino,Rikuta Hamaya,Yoshihisa Kanaji,Tadashi Murai,Jun-Jie Zhang,Fei Ye,Xiaobo 대한심장학회 2022 Korean Circulation Journal Vol.52 No.1

Background and Objectives: The influence of pre-intervention coronary physiologic status on outcomes post percutaneous coronary intervention (PCI) is not well known. We sought to investigate the prognostic implications of pre-PCI fractional flow reserve (FFR) combined with post-PCI FFR. Methods: A total of 1,479 PCI patients with pre-and post-PCI FFR data were analyzed. The patients were classified according to the median values of pre-PCI FFR (0.71) and post-PCI FFR (0.88). The primary outcome was target vessel failure (TVF) at 2 years. Results: The risk of TVF was higher in the low pre-PCI FFR group than in the high pre-PCI FFR group (hazard ratio, 1.82; 95% confidence interval, 1.15–2.87; p=0.011). In 4 group comparisons, the cumulative incidences of TVF at 2 years were 3.8%, 4.1%, 4.8%, and 10.2% in the high pre-/high post-, low pre-/high post-, high pre-/low post-, and low pre-/low post-PCI FFR groups, respectively. The risk of TVF was the highest in the low pre-/low post-PCI FFR group among the groups (p values for comparisons <0.05). In addition, the high pre-/low post-PCI FFR group presented a comparable risk of TVF with the high post-PCI FFR groups (p values for comparison >0.05). When the prognostic value of the post-PCI FFR was evaluated according to the pre-PCI FFR, the risk of TVF significantly decreased with an increase in post-PCI FFR in the low pre-PCI FFR group, but not in the high pre-PCI FFR group. Conclusions: Pre-PCI FFR was associated with clinical outcomes after PCI, and the prognostic value of post-PCI FFR differed according to the pre-PCI FFR.

Circ_0000554 is identified as a cancer‑promoting circRNA in colorectal cancer by regulating the miR‑1205/LASP1 axis

Luo Jinlong,Yang Hua,Peng Xuefeng,Zhang Faqiang,Shu Shilong,Lan Ke,Tu Shengjin,Lu Kai,Cha Xiaoying 한국응용생명화학회 2022 Applied Biological Chemistry (Appl Biol Chem) Vol.65 No.5

Background: Colorectal cancer (CRC) is a prevalent malignant tumor with poor prognosis. Circular RNAs (circRNAs) are key regulators in the progression of CRC. Our study aimed to disclose the role of circ_0000554 in CRC. Methods: The expression of circ_0000554, miR-1205 and LIM and SH3 protein 1 (LASP1) was measured by quantitative real-time polymerase chain reaction (qRT-PCR). Cell proliferation, invasion and migration were monitored using cell counting kit-8 (CCK-8) assay, EdU assay, transwell assay and wound healing assay respectively. The protein levels of C-myc, matrix metallopeptidase 2 (MMP-2) and LASP1 were detected by western blot. Tumor formation assay in nude mice was conducted to explore the role of circ_0000554 in vivo. The association between miR-1205 and circ_0000554 or LASP1 was identified by dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay. Results: circ_0000554 was upregulated in CRC tissues and cells, high circ_0000554 expression was significantly linked to shorter overall survival. Downregulation of circ_0000554 restrained cell growth and metastasis while promoted apoptosis in vitro, and suppressed tumorigenesis of CRC in vivo. Furthermore, mechanism study and rescue experiments confirmed miR-1205 could be sponged by circ_0000554 and its inhibitor reversed the inhibitory effect of circ_0000554 silencing on CRC progression. LASP1 was a target gene of miR-1205 and the upregulation of LASP1 overturned miR-1205-induced effects on CRC cells. Circ_0000554 could elevate LASP1 expression via interacting with miR-1205.

Financial Risk Prevention and Control in Real Estate Industry Research: The case of Company A

Sun Jie,Zhang Jinlong,Zhou Yang 한중경제문화학회 2024 한중경제문화연구 Vol.25 No.-

Today, with the rapid development of economy and the rapid advancement of urbanization, there are still many difficulties and challenges on the road of enterprise production and operation. Especially financial risk, which always accompanies the entire development process of the enterprise, is one of the risks that have the greatest impact on the production process and operation of the enterprise. Timely management and prevention of financial risks is the core link of enterprise operation and development. It can be said that the real estate industry is a very basic and mainstream field, with a certain leading position, and is the mainstay in the process of economic development. Many domestic policies have promoted the development of the real estate industry. The real estate industry continues to grow. Based on the relevant theories of financial risks, this study analyzes in detail the current financial problems faced by Company A, explores the relevant influencing factors of the financial risks of the enterprise, and puts forward specific countermeasures to prevent financial risks, which can help Company A improve the financial risk management system and reduce the occurrence of financial risks.

SNPs in the coding region of bovine MGAT2 gene are associated with body weight and weight gain

Lian Qu,Mingjuan Yang,Jinlong Zhu,Junxia Liu,Mijie Li,Liangzhi Zhang,Xianyong Lan,Chuzhao Lei,Chunlei Zhang,Hong Chen 한국유전학회 2011 Genes & Genomics Vol.33 No.3

Monoacylglycerol acyltransferase 2 (MGAT2), as a candidate gene for quantitative traits, relates to dietary fat uptake, lipids synthesis and storage, which plays a major role in the absorption of dietary fat by catalyzing the resynthesis of triacylglycerol in enterocytes. In this study, based on DNA pool sequencing and PCR‐RFLP methods, polymorphisms of the MGAT2 gene were detected in 1145 Chinese indigenous cattle. The results revealed two novel mutations located on exon 1and exon 5 (NM_001099136.1:m.84G>T and 756A>G). Hence, we described the HaeIII forced PCR–RFLP method in exon1 and a MluI PCR–RFLP method in exon5 to detect them. In addition, the associations of these polymorphisms with growth traits were evaluated in Nanyang cattle. The results showed that only HaeIII locus was associated with body weight and average daily gain aged 6 months, and individuals with genotype TT showed significantly higher body weight and average daily gain than those with genotype GG.

Synthesis of thin diamond films from faceted nanosized crystallites

Sobia Allah Rakha,Shumin Yang,Zhoutong He,Ishaq Ahmed,Dezhang Zhu,Jinlong Gong 한국물리학회 2009 Current Applied Physics Vol.9 No.3

Diamond films consist of crystallites having nanometer grains were deposited using low methane concentration by hot filament chemical vapor deposition (HFCVD). The results show that films consist of nanodiamond grains with grain sizes ranging from 20 nm to 200 nm having thickness dependent size. Increasing the deposition time, the grain size increases and hence the hickness of the film increases. The diamond nucleation (nucleation density 1010 cm-2) is comparable to that obtained by biasing the substrate. The use of low methane concentration for the formation of nano crystallites improves the quality of the film as indicated by Raman spectroscopy. The distance between the filament and substrate is increased while maintaining the substrate temperature. The effects of this large separation on the gas phase chemistry are discussed which helps to understand the reduced size of the crystallites under input gas ratios when microcrystallines are obtained. Diamond films consist of crystallites having nanometer grains were deposited using low methane concentration by hot filament chemical vapor deposition (HFCVD). The results show that films consist of nanodiamond grains with grain sizes ranging from 20 nm to 200 nm having thickness dependent size. Increasing the deposition time, the grain size increases and hence the hickness of the film increases. The diamond nucleation (nucleation density 1010 cm-2) is comparable to that obtained by biasing the substrate. The use of low methane concentration for the formation of nano crystallites improves the quality of the film as indicated by Raman spectroscopy. The distance between the filament and substrate is increased while maintaining the substrate temperature. The effects of this large separation on the gas phase chemistry are discussed which helps to understand the reduced size of the crystallites under input gas ratios when microcrystallines are obtained.

Physiologic Assessment after Coronary Stent Implantation

Doyeon Hwang,Seokhun Yang,Jinlong Zhang,Bon-Kwon Koo 대한심장학회 2021 Korean Circulation Journal Vol.51 No.3

The presence of myocardial ischemia is a prerequisite for the benefit of coronary revascularization. In the cardiac catheterization laboratory, fractional flow reserve and non-hyperemic pressure ratios are used to define the ischemia-causing coronary stenosis, and several randomized studies showed the benefit of physiology-guided coronary revascularization. However, physiology-guided revascularization does not necessarily guarantee the relief of ischemia. Recent studies reported that residual ischemia might exist in up to 15–20% of cases after angiographically successful percutaneous coronary intervention (PCI). Therefore, post-PCI physiologic assessment is necessary for judging the appropriateness of PCI, detecting the lesions that may benefit from additional PCI, and risk stratification after PCI. This review will focus on the current evidence for post-PCI physiologic assessment, how to interpret these findings, and the future perspectives of physiologic assessment after PCI.

Novel Partitioning Algorithm for a Gaussian Inverse Wishart PHD Filter for Extended Target Tracking

( Peng Li ),( Hongwei Ge ),( Jinlong Yang ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.11

Use of the Gaussian inverse Wishart PHD (GIW-PHD) filter has demonstrated promise as an approach to track an unknown number of extended targets. However, the partitioning approaches used in the GIW-PHD filter, such as distance partition with sub-partition (DP-SP), prediction partition (PP) and expectation maximization partition (EMP), fails to provided accurate partition results when targets are spaced closely together and performing maneuvers. In order to improve the performance of a GIW-PHD filter, this paper presents a cooperation partitioning (CP) algorithm to solve the partitioning issue when targets are spaced closely together. In the GIW-PHD filter, the DP-SP is insensitive to target maneuvers but sensitive to the differences in target sizes, while EMP is the opposite. The proposed CP algorithm is a fusion approach of DP-SP and EMP, which employs EMP as a sub-partition approach after DP. Therefore, the CP algorithm will be sensitive to neither target maneuvers nor differences in target sizes. The simulation results show that the use of the proposed CP algorithm will improve the performance of the GIW-PHD filter when targets are spaced closely together.

MAGNETISM IN GRAPHENE SYSTEMS

ERJUN KAN,ZHENYU LI,JINLONG YANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2008 NANO Vol.3 No.6

Graphene has attracted great interest in materials science, owing to its novel electronic structures. Recently, magnetism discovered in graphene-based systems has opened up the possibility of their spintronics application. This paper provides a comprehensive review of the magnetic behaviors and electronic structures of graphene systems, including two-dimensional graphene, one-dimensional graphene nanoribbons, and zero-dimensional graphene nanoclusters. Theoretical research suggests that such metal-free magnetism mainly comes from the localized states or edges states. By applying an external electric field, or by chemical modification, we can turn the zigzag nanoribbon systems into half metal, thus obtaining a perfect spin filter.