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重力方法研究越南早新生代基底效果分析(英文)

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大地测量与地球动力学 2009年第5期29卷 11-17页

作者： cao dinh trieu Pham Nam Hung 越南地球物理研究所

为了提高用重力方法在越南研究早新生代基底结构特点中的效率,表明作者们提出了一个综合分析地质及地球物理资料的系统方法。获得的研究结果表明:1)一个大的平均密度差是在用重力方法研究越南的早新生代基底时效率的一个基本因素;2)用... 详细信息

为了提高用重力方法在越南研究早新生代基底结构特点中的效率,表明作者们提出了一个综合分析地质及地球物理资料的系统方法。获得的研究结果表明:1)一个大的平均密度差是在用重力方法研究越南的早新生代基底时效率的一个基本因素;2)用多维线性相关分析来有效研究和预测越南的早新生代基底岩石的埋藏深度与密度是有可能的;3)通过利用多维线性分析预测密度以及泊松系数使我们能预测早新生代基底岩石。

关键词：早新生代基底地球物理数据重力方法越南

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越南的地震危险性

防灾减灾工程学报 1995年第S1期 12-13页

作者： cao dinh trieu

1 地震危险性评定历史越南1924年开始从事地震研究,由富连研究所地震台(法国支持参与)承担。1968年编制了南越地震区划图.1985年,NCSR地球物理研究所编制了第一张1:200万越南全国综合性地震危险性评估图。其成果已发表并作为工业设计中... 详细信息

1 地震危险性评定历史越南1924年开始从事地震研究,由富连研究所地震台(法国支持参与)承担。1968年编制了南越地震区划图.1985年,NCSR地球物理研究所编制了第一张1:200万越南全国综合性地震危险性评估图。其成果已发表并作为工业设计中的工程场地评定和生命线研究的基础资料。1987年以来,越南国内由于水电站的增加,地震危险性评定成为一个很重要的问题。地震台的数量已经由1957年的2个增至1980年的6个,到1992年已猛增到19个。

关键词：地震危险性水电站地震目录发电厂地震构造带地震带地震台网地震地震动越南

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东南亚断裂构造的演化(英文)

大地测量与地球动力学 2005年第1期25卷 51-60页

作者：高庭朝阮友宣黎文勇范南雄 Mai Xuan Bach Thai Anh Tuan 越南国家自然科学与技术中心地球物理研究所

本研究项目是采用诸如地质学解释、影像判读和地球物理探测等多种方法相结合进行的。在所得结果的基础上参考了越南国内外同行的一些资料编制了东南亚、越南及邻区的断裂构造图,其比例尺分别为1∶4百万和1∶1百万。分析所得结果... 详细信息

本研究项目是采用诸如地质学解释、影像判读和地球物理探测等多种方法相结合进行的。在所得结果的基础上参考了越南国内外同行的一些资料编制了东南亚、越南及邻区的断裂构造图,其比例尺分别为1∶4百万和1∶1百万。分析所得结果显示出东南亚断裂构造演化的下列情况: 1)在现今地质结构方面　东南亚是欧亚岩石圈板块的东南部分,由一条消减带围绕,这条消减带的伸展从 Myanmer开始,通过Nicobar,JavaTimor直到东菲律宾。东南亚被SongHong(即红河)断裂,ThreePagodas断裂和Hainam Natuna断裂等2级断裂系统分成3个微板块。 2)在早新生代,东南亚是分为5个微板块的。它们的分界断裂中有2个一级断裂(中央东海扩张带和Lupar Kuching消减带)和3个二级断裂(即上述3个)。 3)上述绝大多数二和三级断裂从晚新生代起活化且继承了从早新生代即已发生和发展了的二、三级断裂,但在某些条件下,运动方向却完全变成了相反,尤其是走滑运动的方向。我们的研究结果表明:在这一地区内,盆地、隆起、岩浆侵入、褶皱和局部断裂等构造的形成都取决于这些沿着一、二级走滑断裂的微板块运动。

关键词：断裂构造消减带走滑断裂走滑运动板块运动岩石圈演化东南亚中央继承

Novel Criteria for Exponential Stability of Linear Non-Autonomous Functional Differential Equations

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Journal of Systems Science & Complexity 2019年第2期32卷 479-495页

作者： PHAM HUU ANH Ngoc THAI BAO Tran cao THANH Tinh NGUYEN dinh Huy Department of Mathematics Vietnam National University-HCMC International University Faculty of Information Systems Vietnam National University-HCMC University of Information Technology Department of Mathematics Vietnam National University-HCMC University of Information Technology Division of Applied Mathematics Faculty of Applied Sciences Vietnam National University-HCMC Ho Chi Minh city University of Technology

General linear non-autonomous functional differential equations are considered. Explicit criteria for exponential stability are given. Furthermore, the authors present an explicit robust stability bound for systems su... 详细信息

关键词： Exponential stability linear functional differential equations perturbation

Effects of low energy (160 keV) X-ray on microbial inactivation,sprouting inhibition and genetic variation in potato

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Food Bioscience 2022年第3期47卷 262-270页

作者： Nguyen An Son Nguyen Thi Nguyet Ha Nguyen Thi Minh Sang Le Doan dinh Duc Le Ngoc trieu Faculty of Physic and Nuclear Engineering Da Lat UniversityViet Nam Dalat Vocational Training College Viet Nam Faculty of Biology Da Lat UniversityViet Nam

The effects of low energy X-ray irradiation on microbial inactivation,sprouting inhibition and genetic variation were *** was an inverse correlation between the exposure dose in range of 0 Gy–5000 Gy and the survival rate of *** dose of 1000 Gy seemed to be suitable for inactivation of microorganisms because the respective survival rate is relatively low (0.59%).Dose rate of 13.87 Gy/min was the most appropriate to inactivate the microorganisms,with the survival rate of 0.37%.Applying the irradiation dose of 1000 Gy and dose rate of 13.87 Gy/min,there was a significant sprouting inhibition of irradiated potatoes compared to the control for six months *** effect of irradiation dose (100–1200 Gy) and dose rate (8.63–19.62 Gy/min) on genetic variation of the irradiated samples was assessed by DNA fingerprints induced from using three molecular techniques including Random Amplified Polymorphic DNA (RAPD),Start Codon Targeted Polymorphism (SCoT) and CAAT box – derived polymorphism (CBDP).At the irradiation dose of 1000 Gy and dose rate of 13.87 Gy/min,the level of genetic variation was relatively low (4.85%).Thus,this treatment is a suitable condition of irradiation for potato treatment with the purpose of preservation.

关键词： Dose Dose rate Low energy X-ray Microbial inactivation Potato

Antibiotic usage in surgical sperm retrievals among IVF centers

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Asian Journal of Andrology 2022年第6期24卷 633-638页

作者： Le Dang Khoa Ngo dinh trieu Vy Nguyen Minh Tai Loc Le Duc Thang Dang Tuan Anh Nguyen Phuc Hieu Giang Huynh Nhu Nguyen dinh Tao Le Hoang David J Handelsman IVFTA Tam Anh General HospitalHo Chi Minh 700000Vietnam IVFTA Tam Anh General HospitalHa Noi 100000Vietnam IVF Center 16A Ha Dong HospitalHa Noi 100000Vietnam ANZAC Research Institute University of Sydney and Concord Repatriation General HospitalHospital RoadConcordNSW 2139Australia

Surgical sperm retrieval(SSR)is currently one of the most common procedures in in vitro fertilization(IVF).However,a gap between the guidelines and routine clinical practice regarding antibiotic use in sSR,which might lead to antibiotic resistance,is a challenging problem worldwide.A cross-sectional survey was conducted from May 1,2021,to July 15,2021,to investigate antibiotic usage by medical professionals when performing SSR in IVF centers in *** confidential questionnaire comprised 12 items,including characteristics of the study population,awareness of antimicrobial resistance,attitude toward prescribing antibiotics,and current practice of prescribing antibiotics when performing *** were completed by 30 of 45 registered IVF centers(66.7%).Among 67 physicians working at those centers,the age and work-experience years(mean±standard deviation[s.d.])were 38.6±6.6 years and 11.2±7.0 years,*** 60%of them held a degree in Obstetrics and Gynecology,and over four-fifths were *** respondents"often/very often/always"raised awareness of antimicrobial resistance to their patients(83.3%),but only half of them"often/occasionally"prescribed antibiotics to patients with SSR in cases where the prescription would be *** one-tenth of respondents followed the recommendation from the American Urological Association using"prophylaxis only"for SSR *** more invasive SSR,physicians tended to prescribe more complicated and sometimes inappropriate *** conclusion,antibiotic usage in SSR was not always appropriate among IVF *** studies may define specific recommendations for regimens,intervention strategies,and programs to promote appropriate antibiotic use for SSR patients among IVF specialists.

关键词： antibiotic usage in vitro fertilization prophylaxis surgical sperm retrieval treatment

Friction characteristics of mechanically exfoliated and CVD-grown single-layer MoS_2

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Friction 2018年第4期6卷 395-406页

作者： dinh Le cao KY Bien-Cuong TRAN KHAC Chinh Tam LE Yong Soo KIM Koo-Hyun CHUNG School of Mechanical Engineering University of Ulsan Department of Physics and Energy Harvest Storage Research Center University of Ulsan

In this work, the friction characteristics of single-layer MoS2 prepared with chemical vapor deposition （CVD） at three different temperatures were quantitatively investigated and compared to those of single-layer MoS2 prepared using mechanical exfoliation. The surface and crystalline qualities of the MoS2 specimens were characterized using an optical microscope, atomic force microscope （AFM）, and Raman spectroscopy. The surfaces of the MoS2 specimens were generally flat and smooth. However, the Raman data showed that the crystalline qualities of CVD-grown single-layer MoS2 at 800 ℃ and 850 ℃ were relatively similar to those of mechanically exfoliated MoS2 whereas the crystalline quality of the CVD-grown single-layer MoS2 at 900 ℃ was lower. The CVD-grown single-layer MoS2 exhibited higher friction than mechanically exfoliated single-layer MoS2, which might be related to the crystalline imperfections in the CVD-grown MoS2. In addition, the friction of CVD-grown single-layer MoS2 increased as the CVD growth temperature increased. In terms of tribological properties, 800 ℃ was the optimal temperature for the CVD process used in this work. Furthermore, it was observed that the friction at the grain boundary was significantly larger than that at the grain, potentially due to defects at the grain boundary. This result indicates that the temperature used during CVD should be optimized considering the grain size to achieve low friction characteristics. The outcomes of this work will be useful for understanding the intrinsic friction characteristics of single-layer MoS2 and elucidating the feasibility of single-layer MoS2 as protective or lubricant layers for micro- and nano-devices.

关键词： atomic force microscope chemical vapor deposition grain boundary friction mechanical exfoliation MoS2

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电铸参数对铜基平面微弹簧疲劳性能的影响

兵工学报 2016年第7期37卷 1252-1257页

作者： cao Quoc dinh 徐宁李成园张新平南京理工大学材料科学与工程学院江苏南京210094

平面微弹簧性能直接影响着微机电系统(MEMS)的效果和可靠性,研制长寿命的平面微弹簧对于保证微机电系统可靠性具有重要的意义。研究了占空比、电流密度、电源属性对电铸平面微弹簧质量的影响,并基于正交实验设计方法优化了工艺;制备了... 详细信息

平面微弹簧性能直接影响着微机电系统(MEMS)的效果和可靠性,研制长寿命的平面微弹簧对于保证微机电系统可靠性具有重要的意义。研究了占空比、电流密度、电源属性对电铸平面微弹簧质量的影响,并基于正交实验设计方法优化了工艺;制备了尺寸精度合适和疲劳性能良好的平面微弹簧,满足了MEMS的需要。研究表明:大的占空比会降低微弹簧的疲劳性能;双脉冲电源电铸的平面微弹簧疲劳性能优于直流电源和单脉冲电源电铸的;最优工艺为采用双脉冲电源、电流密度3 A/dm2、正向占空比10%;反向占空比10%.平面微弹簧疲劳寿命在定位移0.2 mm的情况下,最大517次。

关键词：兵器科学与技术平面微弹簧微电铸疲劳性能正交实验

Leveraging Quantum Computing for the Ising Model to Simulate Two Real Systems: Magnetic Materials and Biological Neural Networks (BNNs)

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Journal of Quantum Information Science 2023年第3期13卷 138-155页

作者： David L. cao Khoi dinh Thomas Jefferson High School for Science and Technology Alexandria VA USA

Quantum computing is a field with increasing relevance as quantum hardware improves and more applications of quantum computing are discovered. In this paper, we demonstrate the feasibility of modeling Ising Model Hamiltonians on the IBM quantum computer. We developed quantum circuits to simulate these systems more efficiently for both closed and open boundary Ising models, with and without perturbations. We tested these various geometries of systems in both 1-D and 2-D space to mimic two real systems: magnetic materials and biological neural networks (BNNs). Our quantum model is more efficient than classical computers, which can struggle to simulate large, complex systems of particles.

关键词： Ising Model Magnetic Material Biological Neural Network Quantum Computting International Business Machines (IBM)