Simulation analysis and evaluation of decontamination effect of different abrasive jet process parameters on radioactively contaminated metal

Zhong Lin,Deng Jian,Zuo Zhe-wen,Huang Can-yu,Chen Bo,Lei Lin,Lei Ze-yong,Lei Jie-heng,Zhao Mu,Hua Yun-fei 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.11

A new method of numerical simulating prediction and decontamination effect evaluation for abrasive jet decontamination to radioactively contaminated metal is proposed. Based on the Computational Fluid Dynamics and Discrete Element Model (CFD-DEM) coupled simulation model, the motion patterns and distribution of abrasives can be predicted, and the decontamination effect can be evaluated by image processing and recognition technology. The impact of three key parameters (impact distance, inlet pressure, abrasive mass flow rate) on the decontamination effect is revealed. Moreover, here are experiments of reliability verification to decontamination effect and numerical simulation methods that has been conducted. The results show that: 60Co and other homogeneous solid solution radioactive pollutants can be removed by abrasive jet, and the average removal rate of Co exceeds 80%. It is reliable for the proposed numerical simulation and evaluation method because of the well goodness of fit between predicted value and actual values: The predicted values and actual values of the abrasive distribution diameter are Ф57 and Ф55; the total coverage rate is 26.42% and 23.50%; the average impact velocity is 81.73 m/s and 78.00 m/s. Further analysis shows that the impact distance has a significant impact on the distribution of abrasive particles on the target surface, the coverage rate of the core area increases at first, and then decreases with the increase of the impact distance of the nozzle, which reach a maximum of 14.44% at 300 mm. It is recommended to set the impact distance around 300 mm, because at this time the core area coverage of the abrasive is the largest and the impact velocity is stable at the highest speed of 81.94 m/s. The impact of the nozzle inlet pressure on the decontamination effect mainly affects the impact kinetic energy of the abrasive and has little impact on the distribution. The greater the inlet pressure, the greater the impact kinetic energy, and the stronger the decontamination ability of the abrasive. But in return, the energy consumption is higher, too. For the decontamination of radioactively contaminated metals, it is recommended to set the inlet pressure of the nozzle at around 0.6 MPa. Because most of the Co elements can be removed under this pressure. Increasing the mass and flow of abrasives appropriately can enhance the decontamination effectiveness. The total mass of abrasives per unit decontamination area is suggested to be 50 g because the core area coverage rate of the abrasive is relatively large under this condition; and the nozzle wear extent is acceptable

Protein Cyclization Enhanced Thermostability and Exopeptidase-Resistance of Green Fluorescent Protein

( Zhong Lin Zhao ),( Xin Ma ),( Liang Li ),( Wei Zhang ),( Shu Zhen Ping ),( Ming Qun Xu ),( Min Lin ) 한국미생물 · 생명공학회 2010 Journal of microbiology and biotechnology Vol.20 No.3

Different fates of oocytes with DNA double-strand breaks in vitro and in vivo

Lin, Fei,Ma, Xue-Shan,Wang, Zhen-Bo,Wang, Zhong-Wei,Luo, Yi-Bo,Huang, Lin,Jiang, Zong-Zhe,Hu, Meng-Wen,Schatten, Heide,Sun, Qing-Yuan Taylor Francis 2014 Cell Cycle Vol.13 No.17

Process Design and Longitudinal Deformation Prediction in Continuous Sheet Metal Roll Forming for Three- Dimensional Surface

Zhong-Yi Cai,Lin-Lin Li,Mi Wang,Ming-Zhe Li 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.

Continuous roll forming (CRF) is a process to form three-dimensional surface based on the rolling deformation of sheet metal. Unliketraditional rolling process where the working rolls are straight and rigid, two small-diameter bendable forming rolls are used herein,and the sheet metal is bent in longitudinal and transverse directions simultaneously after it is compressed between a pair of bendedrolls. The formed surface is controlled by the curved shapes of the forming rolls and the gap between the two rolls, and the roll gapis the crucial parameter of CRF process. In this paper, the required velocity distribution of material across the exit of roll gap forthe formation of a smooth surface is analyzed, the formulations for the CRF process design is derived and a method to predict thelongitudinal bending deformation generated by roll gap is presented. Finally, the validity of the presented methods and theoreticalmodels are demonstrated by numerical simulations and CRF tests for typical surface parts.

Phenolic glycosides from the rhizomes of Cyperus rotundus and their antidepressant activity

Lin, San-qing,Zhou, Zhong-liu,Zhang, Hua-lin,Yin, Wen-qing 한국응용생명화학회 2015 Applied Biological Chemistry (Appl Biol Chem) Vol.58 No.5

Depression is the most common psychiatric comorbidity in patients. Searching for antidepressant drugs from natural products is very important for the treatment of this disease. The ethanol extract and its fractions of Cyperus rotundus were evaluated for antidepressant activities in mice by our group. The aim of this study was to investigate the potential active components of C. rotundus. The extraction and solvent partition of the rhizomes of C. rotundus, and repeated column chromatography for n-BuOH fraction yielded three new phenolic glycosides, rotunduside D (1), rotunduside E (2), and rotunduside F (3). Their chemical structures were identified on the basis of spectroscopic data analyses including NMR, MS, UV, and IR. The potential antidepressant activity of all the isolated compounds was evaluated. In the despair mice models, rotunduside F (3) showed significant antidepressant activity at the dosage of 50 mg/kg, which was close to the positive control fluoxetine (20 mg/kg).

Existence of Nonoscillatory Solution of Second Order Nonlinear Neutral Delay Equations

Lin, Shi-Zhong,Qu, Ying,Yu, Yuan-Hong Department of Mathematics 2006 Kyungpook mathematical journal Vol.46 No.2

In this paper, we study nonoscillatory solutions of a class of second order nonlinear neutral delay differential equations with positive and negative coefficients. Some sufficient conditions for existence of nonoscillatory solutions are obtained.

제11회 한,중 형법 국제 학술심포지엄 : 중국형법의 단위범죄

쳔쫑린 ( Zhong Lin Chen ) 한국비교형사법학회 2013 비교형사법연구 Vol.15 No.2

In the sense of Chinese criminal law, the "unit" should be defined as a combination of natural person which has a relatively independent property and social function, with the capacity of acting in its own name to conduct the activity of relatively independent. in Chinese criminal law , the "Unit crime " should be refers to crime executed by a qualified representative of a unit, in the process of unit functions and for the interests of the unit , performed in the name of the unit to organize the implementation of conduction criminal responsibility. In law, unit crime can only be the behavior for which the unit shall bear criminal responsibility, the doctrine is wrong when it says that there are some “unit crime” for which only the natural person bear criminal responsibility.

중국 재판문서의 수사추론에 관한 고찰

종임연 ( Zhong Lin Yan ) 한중사회과학학회 2022 한중사회과학연구 Vol.20 No.1

재판문서의 수사추리란 재판문서에 수사기술을 적용해 청중을 설득하는 효과를 내는 것이다. 본 고에서는 크게 세 가지 측면에서 중국 재판문서 수사추리를 고찰하였다. 첫째, 수사추리 수용자로 당사자(원고, 공소인, 피고, 변호사, 이익관계자 등)와 법관·사회적 공인을 포함하고, 둘째, 수사추리의 주요 내용으로 실체적 내용과 절차적 내용을 포함하며, 재판문서는 사실인정·법적 적용·결론생성과 같은 실체적 내용에 대한 수사추리, 수사추리의 중요성, 재판추리 수용의 예술성과 재판결론을 제고하는 것이다. 중국은 재판문서와 재판문서 추리 개혁이 중단 없이 이뤄져 개혁과 함께 상당한 성과를 거뒀지만 현재 중국 재판문서 추리의 효과는 판결 수용성에 대한 사회적 기대와는 거리가 있다. 따라서 재판문서의 논리 및 작성 규범 등에 대한 고민이 필요하다. 법관이 재판에 임할 때 이치에 맞도록 해야 하고, 또 사정도 해야 하는 것은 사법재판의 정리가 재판 문서추리에 있어 수사(修辭)를 필요하게 하는 것이다. 법관이 재판문서에 적절한 수사기술을 적용해 법리추리를 하면, 법관의 재판리 감정논증을 강화하고, 법리적이면서도 정리를 겸비한 판결을 내려 사법재판의 수용성을 높일 수 있다. 전체적으로 대륙법계에 속하는 한국의 법제도에서도 중국과 유사성을 지니고 있으며, 중국 재판문서의 수사추리를 연구함으로써 한국의 재판문서추리에 시사점을 제공할 것이라 본다. The rhetorical reasoning of the judgment documents mentioned in this paper, that is, the use of rhetorical techniques in the judgment documents in order to persuade the audience, is intended to make judicial decisions more acceptable. This paper probes into the rhetorical reasoning of Chinese judgment documents from the following three dimensions. The first is the audience of rhetorical reasoning, including the parties (the plaintiff, the prosecutor, the defendant, the lawyer, the interested parties, etc.), judges and the public; the second is the main content of rhetorical reasoning, including substantive content and procedural content, where the main rhetorical reasoning of judgment documents is about the determination of facts, the application of laws and the generation of conclusions; the third is the significance of rhetorical reasoning, mainly from two aspects: improving the artistry of judgment reasoning and the acceptability of judgment conclusion. Although the reform of the reasoning of judgment documents in China has not been interrupted and has achieved remarkable results, there is still a certain gap between the effect of reasoning of judgment documents and the public’s psychological expectation of the acceptability of judgment in China. Therefore, it is necessary to think about the reasoning and specification of the judgment documents. The judge should not only enlighten the public with reason, but also touch their emotions. It is the emotional requirement of judicial judgment that makes rhetoric in the judgment documents become necessary. By using appropriate rhetorical techniques in judicial documents, judges can strengthen their emotional argumentation in judicial reasoning, so as to make judgments that are both legal and reasonable, thus improving the acceptability of judicial decisions. South Korea’s law belongs to the civil law system, and its legal system is similar to that of China. By studying the rhetorical reasoning in Chinese judgment documents, this paper hopes to provide relevant reference value for the reasoning of judgment documents in South Korea.

Effects of Aqueous Extract of Schizandra Chinensis Fruit on Cadmium-Induced Change of Monoamine Neurotransmitters in Rats

Zheng Lin Zhao,Guang Wen Zhao,Li Li,Meng Quan Li,Li Xin Guan,Xu Dong Yang,Hou Zhong Li,Feng Lin,Jong Rok Lee,Rong Jie Zhao 한국독성학회 2009 Toxicological Research Vol.25 No.1

The effects of aqueous extract of Schizandra Chinensis Fruit (AESC) on cadmium-induced changes of monoamine neurotransmitters in the different brain regions of adult rats were investigated. Male rats were received intraperitoneal (i.p.) administration of CdCl₂ (0.6 ㎎/㎏/d) for 21 days and sacrificed 7 days after the last administration. Concentrations of norepinephrine (NE), dopamine (DA) in striatum and serotonin (5-HT), 5-hydroxyindole acetic acid (5-HIAA) in cortex were measured by HPLC. There were significant decreases of NE, DA, 5-HT and 5-HIAA in Cd intoxicated rats (P < 0.05), while pretreatment with AESC (20 ㎎/㎏/d or 60 mg/kg/d, p.o., 30 min before CdCl₂) greatly inhibited the decrease of monoamine transmitters, respectively (P < 0.05). Also, AESC significantly increased the reduction of glutathione contents and superoxide dismutase activities in cortex induced by CdCl₂. These results suggest that AESC ameliorates Cd-induced depletion of monoamine neurotransmitters in brain through its antioxidant activity.

Disease burden of prostate cancer from 2014 to 2019 in the United States: estimation from the Global Burden of Disease Study 2019 and Medical Expenditure Panel Survey

Shen Lin,Dong Lin,Yiyuan Li,Lixian Zhong,Wei Zhou,Yajing Wu,Chen Xie,Shaohong Luo,Xiaoting Huang,Xiongwei Xu,Xiuhua Weng 한국역학회 2023 Epidemiology and Health Vol.45 No.-

OBJECTIVES: The aim of this study was to evaluate the disease burden of prostate cancer (PC) and assess key influencing factors associated with the disease expenditures of PC in the United States. METHODS: The total deaths, incidence, prevalence, and disability-adjusted life-years of PC were obtained from the Global Burden of Disease Study 2019. The Medical Expenditure Panel Survey was used to estimate healthcare expenditures and productivity loss and to investigate patterns of payment and use of healthcare resources in the United States. A multivariable logistic regression model was conducted to identify key factors influencing expenditures. RESULTS: For patients aged 50 and older, the burden for all age groups showed a modest increase over the 6-year period. Annual medical expenditures were estimated to range from US$24.8 billion to US$39.2 billion from 2014 to 2019. The annual loss in productivity for patients was approximately US$1,200. The top 3 major components of medical costs were hospital inpatient stays, prescription medicines, and office-based visits. Medicare was the largest source of payments for survivors. In terms of drug consumption, genitourinary tract agents (57.0%) and antineoplastics (18.6%) were the main therapeutic drugs. High medical expenditures were positively associated with age (p=0.005), having private health insurance (p=0.016), more comorbidities, not currently smoking (p=0.001), and patient self-perception of fair/poor health status (p<0.001). CONCLUSIONS: From 2014 to 2019, the national real-world data of PC revealed that the disease burden in the United States continued to increase, which was partly related to patient characteristics.