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Continuously Doping Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)into Electron-Doped Superconductor by CaH_(2)Annealing Method

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Chinese Physics Letters 2022年第7期39卷 93-97页

作者： Jin Zhao Yu-Lin Gan Guang Yang Yi-Gui Zhong Cen-Yao Tang Fa-Zhi Yang Giao ngoc phan Qiang-Tao Sui Zhong Liu Gang Li Xiang-Gang Qiu Qing-Hua Zhang Jie Shen Tian Qian Li Lu Lei Yan Gen-Da Gu Hong Ding Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physics University of Chinese Academy of SciencesBeijing 100190China Institute for Solid State Physics University of TokyoChiba 277-8581Japan Songshan Lake Materials Laboratory Dongguan 523808China Condensed Matter Physics and Materials Science Department Brookhaven National LaboratoryUptonNew York 11973USA

As a typical hole-doped cuprate superconductor,Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)(Bi2212)carrier doping is mostly determined by its oxygen *** doping methods can regulate its doping level within the range of hole *** we report the first application of CaH_(2)annealing method in regulating the doping level of *** continuously controlling the anneal time,a series of differently doped samples can be *** combined experimental results of x-ray diffraction,scanning transmission electron microscopy,resistance and Hall measurements demonstrate that the CaH_(2)induced topochemical reaction can effectively change the oxygen content of Bi2212 within a very wide range,even switching from hole doping to electron *** also found evidence of a low-T_c superconducting phase in the electron doping side.

关键词： into Electron-Doped Superconductor by CaH_(2)Annealing Method Continuously Doping Bi_(2)Sr_(2)CaCu_(2)O

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城市湖泊生态改造设计

安徽农学通报 2016年第23期22卷 100-101,121页

作者： Tang Van Tai Tran ngoc Binh Nguyen Nhu Anh phan Hong Nhung 东南大学土木工程学院市政工程系江苏南京210096

转通湖泊驳岸技术是使用混凝土和浆砌石材料来建造硬质直立式驳岸结构为达到固土目标,但是硬化混凝土驳岸系统已经破坏了湖泊水生态和自然景观。湖泊生态化改造是通过土木工程结合生态技术,强化湖泊的自身防止污染功能,同时提高了湖泊... 详细信息

转通湖泊驳岸技术是使用混凝土和浆砌石材料来建造硬质直立式驳岸结构为达到固土目标,但是硬化混凝土驳岸系统已经破坏了湖泊水生态和自然景观。湖泊生态化改造是通过土木工程结合生态技术,强化湖泊的自身防止污染功能,同时提高了湖泊生态多样性及水体自能力[1]。该研究通过调研越南荣市气候、环境特点与南湖污染现状,提出了湖泊驳岸生态化改造设计方案。

关键词：水生态修复越南南湖生态驳岸湖泊改造

Polygonatum kingianum rhizome extract alleviates collagen antibody-induced arthritis by modulating proinflammatory cytokine production in mice

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Asian Pacific Journal of Tropical Biomedicine 2020年第11期10卷 490-495页

作者： Huyen Do Thi Thanh Phuong Ngo Thi Hien Nguyen Thi Thu Nga Nguyen Thi Hung Le ngoc Thao DoThi Ha Le Minh Graduate University of Science and Technology Vietnam Academy of Science and Technology18 Hoang Quoc VietNghia DoCau GiayHanoiVietnam Institute of Natural Products Chemistry Vietnam Academy of Science and Technology18 Hoang Quoc VietNghia DoCau GiayHanoiVietnam Hanoi Open University101 Nguyen Hien str Hai Ba Trung Dist.HanoiVietnam Laboratory of Bioassay Institute of BiotechnologyVietnam Academy of Science and Technology18 Hoang Quoc VietNghia DoCau GiayHanoiVietnam Chemistry Lab Project Center for Research and Technology transferVietnam Academy of Science and Technology18 Hoang Quoc VietNghia DoCau GiayHanoiVietnam

Objective: To evaluate the anti-arthritic effects of Polygonatum kingianum rhizome extract using both in vitro and in vivo ***: Lipopolysaccharide-induced RAW 264.7 macrophages were treated with an ethanol extract of Polygonatum kingianum rhizomes at different concentrations to determine nitric oxide and prostaglandin E2(PGE2) production. For in vivo study, Polygonatum kingianum ethanol extract was further investigated for its antiinflammatory effect in a mouse model with collagen antibodyinduced arthritis. Phytochemical study of Polygonatum kingianum ethanol extract was also ***: Saponins(142 mg/g total yield) was the main component in the Polygonatum kingianum ethanol extract. 5α,8α-ergosterol peroxide,(E,E)-9-oxooctadeca-10,12-dienoic acid and 3-(2?-hydroxy-4?-methoxy-benzyl)-5,7-dihydroxy-8-methyl-chroman-4-one were isolated from the extract. Polygonatum kingianum ethanol extract exhibited potential anti-inflammatory effects by inhibiting nitric oxide and PGE2 production in RAW 264.7 cells in a dosedependent manner. The level of arthritis in mice with collagen antibody-induced arthritis was significantly reduced(P<0.01) after treatment with Polygonatum kingianum ethanol extract, particularly at a dose of 1 000 mg/kg body weight. Besides, the extract demonstrated the regulatory effects on serum tumor necrosis factoralpha, interleukin-6, and interleukin-10 in treated ***: Polygonatum kingianum ethanol extract has beneficial effects on inflammatory cytokine regulation and PGE2 inhibition in an experimental mouse model with collagen antibody-induced arthritis. The phytochemical screening reveals that the saponin, as the main component, and sterols(daucosterol and 5α,8α-ergosterol peroxide) from Polygonatum kingianum ethanol extract may contribute to its promising in vitro and in vivo anti-inflammatory activities.

关键词： inflammatory cytokine PGE2

Twin reversed arterial perfusion sequence-a rare and dangerous complication form of monochorionic twins:A case report

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World Journal of Clinical Cases 2022年第28期10卷 10214-10219页

作者： Nguyen Duy Anh Nguyen-Thi Thu Ha Nguyen-Thi Sim Nguyen Khac Toan phan-Thi Huyen Thuong Nguyen Minh Duc Fetal Medicine Center Hanoi Obstetrics and Gynecology HospitalHanoi 100000Vietnam Department of Assisted Reproduction Hanoi Obstetrics and Gynecology HospitalHanoi 100000Vietnam Department of Obstetrics and Gynecology Hanoi University of Medicine and PharmacyHanoi 100000Vietnam Department of Radiology Pham Ngoc Thach University of MedicineHo Chi Minh City 700000Vietnam

BACKGROUND Twin reversed arterial perfusion(TRAP) sequence is an extremely rare congenital anomaly in monochorionic(MC) *** condition is characterized by a malformed fetus(acardiac twin) without cardiac activities being perfused by a structurally normal one(pump twin) via an artery-to-artery anastomosis in a reverse *** SUMMARY We described the first case of TRAP to receive laser surgery in *** 26-wk pregnancy was originally misdiagnosed in another hospital as MC twins with single intrauterine fetal *** admission to our center,the diagnosis was amended to a 26-wk TRAP sequence stage *** acardiac twin was 7.5 cm at the longest length,the ratio of the weight of the acardiac twin to the weight of the pump twin was more than 90%,the pump twin showed fetal distress with absent diastolic flow in umbilical artery of pump twin,and the peak systolic velocity in the middle cerebral artery = 1.6 Mo *** performed emergency laser photocoagulation of the acardiac twin’s umbilical *** surgery,we successfully maintained the pregnancy for 8 wk and ended it electively by cesarean section at 34 wk of gestation due to rupture of *** TRAP should be appropriately diagnosed and treated early to avoid complications of the pump *** laser photocoagulation is a new and effective treatment for this condition.

关键词： Twin reversed arterial perfusion Acardiac twin Pump twin Laser Case report

Preliminary Results of Application Mobilev Traffic model to Calculate Air Emission and Assessing Policies for Reducing Air Emissions in an ASEAN City

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现代交通（中英文版） 2016年第1期5卷 1-10页

作者： Ho quoc Bang Vu Hoang ngoc Khue Institute for Environment and Resources(IER)/Vietnam National University in Ho Chi Minh City Vietnam142 To Hien Thanh StreetDist.10Ho Chi MinhVietnam

Traffic is one of the main air pollution source in urban cities,especially in Ho Chi Minh ***,it emits a huge amount of pollutants into the atmosphere;and air quality in HCMC becomes worse due to circulation of outdate private ***,clean air plan(CAP)is necessary for reducing air pollution level in the city and air emission inventory(EI)is an essential step to develop *** model from Germany was chosen to conduct EI for *** include of this study:(i)elaborating an air emission inventory(EI)from road traffic activities over HCMC;and(ii)assessing emission control policies and study abatement strategies to reduce air pollution level from traffic activities for HCMC in *** results indicated that motorcycles are the main sources of air emission in *** emissions of CO are 3,586.707 tons/year,following ish VOC,NOx,CH4,NO2,SO2 and particulate matter(PM).In addition,CO2,which is one of the main greenhouse gases,also included and contributed 36,293.501 ton/*** pollutants concentrated in the center which has crowded roads and population,affecting directly human ***,a replaced private vehicle with public transportation is necessary to reduce *** abatement strategies to 2020 for reducing emissions were performed and showed that if the HCMC government has severe policies on motor vehicles,the emission will be reduced until 60%,opposite emissions in 2020 will be increased to 200%.

关键词： Emission Inventory Mobilev Model Ho Chi Minh Transportation Air Pollution ASEAN Cities

Contributions of Rotation,Expansion and Line Broadening to the Morphology and Kinematics of the Inner CSE of Oxygen-rich AGB Star R Hya

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Research in Astronomy and Astrophysics 2023年第1期23卷 40-47页

作者： Pham Tuyet Nhung Do Thi Hoai Pierre Darriulat Pham ngoc Diep Nguyen Bich ngoc Tran Thi Thai Pham Tuan-Anh Department of Astrophysics Vietnam National Space CenterVietnam Academy of Science and Technology18Hoang Quoc VietNghia DoCau GiayHa NoiVietnam

We use archival ALMA observations of the CO(2-1)and SiO(5-4)molecular line emissions of AGB star R Hya to illustrate the relative contributions of rotation,expansion and line broadening to the morphology and kinematics of the circumstellar envelope(CSE)within some~70 au(~0."5)from the centre of the *** give evidence for rotation and important line broadening to dominate the inner region,within~14 au(~100 mas)from the centre of the *** former is about an axis that projects a few degrees west of north and has a projected rotation velocity of a few km s^(-1).The latter occurs within some 7-14 au(50-100 mas)from the centre of the star,with the line width reaching two to three times its value outside this *** suggest that it is caused by shocks induced by stellar pulsations and convective cell *** show the importance of properly accounting for the observed line broadening when discussing rotation and evaluating the radial dependence of the rotation velocity.

关键词： stars AGB and post-AGB-(stars:)circumstellar matter-radio lines

The effectiveness of light emitting diode(LED)lamps in the offshore purse seine fishery in Vietnam

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Aquaculture and Fisheries 2023年第5期8卷 551-557页

作者： Nguyen Dang Nhat Do Thanh Tien Truong Van Dan Nguyen Duy Quynh Tram Nguyen Quang Lich Ho Dang Phuc Nguyen ngoc Phuoc School of Engineering and Technology Hue University01 Dien Bien PhuHue City52000Viet Nam Faculty of Engineering and Food Technology University of Agriculture and ForestryHue University102 Phung HungHue City52000Viet Nam Faculty of Fisheries University of Agriculture and ForestryHue University102 Phung HungHue City52000Viet Nam Institute of Mathematics Vietnam Academy of Science and Technology18 Hoang Quoc VietCau Giay DistrictHanoi11300Viet Nam

Fishing with artificial light has become one of the most advanced,efficient,and common methods for the night-time purse seining in *** study evaluated the radiation spectrum,CIE chromaticity coordinates,correlated color temperature(CCT),catch rate,fuel consumption,and CO_(2)emissions when using Light emitting diode(LED)lamps(0.196 kW)in comparison with the use of metal halide(MH)lights(1 kW)in the offshore purse seine fishery in Quang Tri province,*** fishing efficiency of the purse seine fishing boats using LED lamps has increased 1.58 times in catch rate than MH lights,although the energy consumption of LED lamp is 4 times *** consumption of boats per trip using LED lamps was one third of that using MH *** use of LED reduced the radiation spectrum,especially the intense UV radiation which negatively affects the health of *** study also showed the potential of CO_(2)emission reduction up to 1.09 tons of CO_(2)per trip per boat from the use of LED lamps in the offshore purse seine fishing boats.

关键词： Light emitting diode(LED)lamp Metal halide(MH)light Offshore purse seine fishery Quang tri province Vietnam

A New Method Combining Interior and Exterior Approaches for Linear Programming

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Journal of Mathematics and System Science 2015年第5期5卷 196-206页

作者： Nguyen ngoc Chu Pham Canh Duong Le Thanh Hue Institute of Mathematics 18 Hoang Quoc Viet HanoL Vietnam. Center for Information Infrastructure Development Vietnamese Academy of Science and Technology 18 Hoang Quoc Viet HanoiVietnam. Faculty of lnformatics Technology University of Mining and Geology Hanoi Vietnam.

In this paper we present a new method combining interior and exterior approaches to solve linear programming problems. With the assumption that a feasible interior solution to the input system is known, this algorithm uses it and appropriate constraints of the system to construct a sequence of the so called station cones whose vertices tend very fast to the solution to be found. The computational experiments show that the number of iterations of the new algorithm is significantly smaller than that of the second phase of the simplex method. Additionally, when the number of variables and constraints of the problem increase, the number of iterations of the new algorithm increase in a slower manner than that of the simplex method.

关键词： Linear programming simplex method station cone.

The Roughness of Model Function to the Basis Functions

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Journal of Mathematics and System Science 2013年第8期3卷 385-390页

作者： To Van Ban Nguyen Thi Quyen phan Thu Ha Department of mathematics IT faculty Le Quy Don Technical University 100 Hoang Quoc Viet Cau Giay District Hanoi Vietnam Faculty of Mathematics Hai Phong University 1 71 Phan Dang Luu Kien An District Hai Phong Vietnam

The roughness of the model function f（x） to the basis functions has been identified. When the model function is continuous segment, its roughness does not depend on the behavior of the first segment, but depends on ＂h＂, the shift in the slope of two consecutive segments. If the distribution of design is uniform, f（x） is continuous segment function, and h is constant, then the maximum roughness is h2/192 obtained at the midpoint of the observations. Suppose that we have a sequence of designs {Pn（x）} then its corresponding distribution {Fn （x）} converges weakly to some distribution F（x）. Let D（f） be a set of discontinuous points off（x）, it is possible to take the limit of the roughness if D（f） has zero （dF）-measure. The behavior of maximum roughness of the discontinuous segment function has been studied by using grid points.

关键词： The roughness segment function model function design converge.