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Search Results: 1 - 10 of 2050 matches for " Tran Trong Lap "
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Magnetic Method Surveying and Its Application for the Concealed Ore-Bodies Prospecting of Laba Porphyry Molybdenum Ore Field in Shangri-La, Northwestern Yunnan Province, China  [PDF]
Nguyen Ba Dai, Chuan Dong Xue, Kun Xiang, Kun Xiang, Tran Trong Lap, Qureshi Javed Akhter, Shi Lei Li
Journal of Geoscience and Environment Protection (GEP) , 2014, DOI: 10.4236/gep.2014.23006

Recently, a number of large molybdenum (-copper) deposits have been discovered successively in the Laba area, Shangri-La county, northwestern Yunnan province. The investigation confirmed that there is a superlarge porphyry-skarn hydrothermal vein type molybdenum-polymetallic- metallogenic system with the total prediction reservoir of more than 150 mt molybdenum. The porphyry intrusions contributed to the mineralization closely, the superficial little vein molybdenum (-copper, lead, silver) ore-bodies are usually located in faults and fractures, and the deep porphyry type ore-bodies occurred in the granodiorite porphyries, the skarn type ore-bodies occurred in the contact zone intrused into Triassic limestone or Permian basalts. Laba ore block is a new exploration area with great prospecting potential. In order to reduce the target area and guide the further exploration work, the magnetic method measurement about 3.3 square kilometres was carried out in the ore field. This paper presents an application of analyzing the horizontal and vertical derivative, using Fast Fourier Transform (FFT) filter (FFT high-pass, low-pass, cosine roll-off, suscepbility), calculated spectra frequency energy to predict the depth and intensity of the apparent remanence magnetization of source (Hilbert). The calculated results and magnetic anomalous show that the remanence anomaly is caused by the intrusions into the Triassic limestone and Permian basalts with small anomalies, and the depth of located source is not great. We have identified a number of positions to the three drilled well, the drilled result specify interpretation with very high accuracy. The magnetic method is helpful to identify porphyry mineralization, and judge the shape and depth of the concealed ore-bearing intrusive bodies under the similar geological condition.

Application of Audio-Magnetotelluric Method for Exploration the Concealed Ore-Bodies in Yuele Lead-Zinc Ore Feild, Daguan County, NE Yunnan Province, China  [PDF]
Tran Trong Lap, Chuandong Xue, Aiying Wei, Lv Liu, Wenyao Li, Qiquan Hu, Jingjie Li, Dafeng Luo, Shaoyong Zhu, Tiangui Zhang
Journal of Geoscience and Environment Protection (GEP) , 2014, DOI: 10.4236/gep.2014.23005

The results of recent mineral exploration in the Yuele lead-zinc mining area of Daguan County, northeastern Yunnan province, showed that there are much early Paleozoic strata under thick late Paleozoic strata in northeastern Yunnan province, where developed some hidden salt structures (SSs), often with lead-zinc polymetallic mineralization varying degrees along the tension torsional fault (belts) or fracture (joint). The ore-bodies belong to the epigenetic hydrothermal filling vein-type deposit, and the prospecting potential is great. In this area, the superficial mineralization information displayed clear, but the deep mineralization is unknown, so the exploration work is restricted. The audio-megnetotelluric (AMT) surveying is an advantageous method to characterize the size, resistivity and skin depth of the polarizable mineral deposit concealed beneath thick overburden. This paper presents the surveying results using AMT method to evaluate the concealed lead-zinc mineralization in Yuele lead-zinc ore field, Daguancounty, NE Yunnan province, China. After comparing the interpretation result of AMT surveying data with the geological data and the drilling data, it is found that there is some distinct difference in resistivity and polarizable between ore-bodies hosted strata, upper strata and gypsum strata. The results show that AMT method is helpful to identify lead-zinc mineralization under this geological condition.

Investigation on Evolutionary Computation Techniques of a Nonlinear System
Tran Trong Dao
Modelling and Simulation in Engineering , 2011, DOI: 10.1155/2011/496732
Abstract: The main aim of this work is to show that such a powerful optimizing tool like evolutionary algorithms (EAs) can be in reality used for the simulation and optimization of a nonlinear system. A nonlinear mathematical model is required to describe the dynamic behaviour of batch process; this justifies the use of evolutionary method of the EAs to deal with this process. Four algorithms from the field of artificial intelligent—differential evolution (DE), self-organizing migrating algorithm (SOMA), genetic algorithm (GA), and simulated annealing (SA)—are used in this investigation. The results show that EAs are used successfully in the process optimization. 1. Introduction Evolutionary computation (EC) techniques, which are based on a powerful principle of evolution: survival of the fittest, constitute an interesting category of heuristic search. Evolutionary computation techniques are stochastic algorithms whose search methods model some natural phenomena: genetic inheritance and Darwinian strive for survival. The best known algorithms in this class include genetic algorithms, evolutionary programming, evolution strategies, and genetic programming. There are also many hybrid systems which incorporate various features of the above paradigms and consequently are hard to classify; anyway, we refer to them just as evolutionary computation methods [1]. In computer science, evolutionary computation is a subfield of artificial intelligence that involves combinatorial optimization problems. Nowadays, Optimization is one of these words which is used almost every day in different fields of human activities. Everybody wants to maximize profit and minimize cost. This means optimizing in every task of industry, transportation, medicine, everywhere. For these purposes, we need to have suitable tools which are able to solve very difficult and complicated problems. As previous years proved, use of artificial intelligence and soft computing contribute to improvements in a lot of activities. One of such tools of soft computing are evolutionary algorithms [2]. In this paper, the modeling of a dynamic chemical engineering process is presented in a highly understandable way using a unique combination of the simplified fundamental theory and direct hands-on computer simulation. A nonlinear mathematical model is required to describe the dynamic behaviour of batch process; this justifies the use of evolutionary method of the EAs to deal with this process, for static optimization of a chemical batch reactor. Consequently, it is used to design geometry technique equipments for
ILD SiW ECAL and sDHCAL dimension-performance optimisation
Trong Hieu Tran
Physics , 2014,
Abstract: The ILD, International Large Detector, is one of the detector concepts for a future linear collider. Its performance is investigated using Monte-Carlo full simulation and PandoraPFA. Among several options, a combination of the silicon-tungsten electromagnetic calorimeter (SiW ECAL) and the semi-digital hadronic calorimeter (sDHCAL) presenting the highest granularity calorimeters, is here investigated. It is shown that by reducing the radius and length of the entire detector by a factor of $\sim1.3$ with respect to the baseline dimensions, the jet energy resolution is degraded by 8 to 19% in the range of 45 and 250 GeV. The price of ILD which scales roughly quadratically with the ILD dimensions may be reduced by a factor of nearly two. A similar study made with the SiW ECAL and the analog hadronic calorimeter (AHCAL) shows that for an inner radius of ECAL of about~1.4 m, the performance is comparable between sDHCAL and AHCAL.
Regularization of a discrete backward problem using coefficients of truncated Lagrange polynomials
Duc Trong Dang,Ngoc Lien Tran
Electronic Journal of Differential Equations , 2007,
Abstract: We consider the problem of finding the initial temperature $u(x,0)$, from a countable set of measured values ${ u(x_j,1)}$. The problem is severely ill-posed and a regularization is in order. Using the Hermite polynomials and coefficients of truncated Lagrange polynomials, we shall change the problem into an analytic interpolation problem and give explicitly a stable approximation. Error estimates and some numerical examples are given.
A Characterization of Triangle-free Gorenstein graphs and Cohen-Macaulayness of second powers of edge ideals
Do Trong Hoang,Tran Nam Trung
Mathematics , 2015, DOI: 10.1007/s10801-015-0631-0
Abstract: We graph-theoretically characterize triangle-free Gorenstein graphs $G$. As an application, we classify when $I(G)^2$ is Cohen-Macaulay.
Approaches in Developing Undergraduate IT Engineering Curriculum for the Fourth Industrial Revolution in Malaysia and Vietnam  [PDF]
Tran Thi Bich Lieu, Nguyen Huu Duc, Nancy Webster Gleason, Duong Trong Hai, Nguyen Duy Tam
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.916207
Abstract: Curricula have important effects on students’ professional skills. To prepare for the fourth industrial revolution (4IR), countries are recommended to implement new curricula to develop new competencies for the automation workforce. As Information technology (IT) lays the foundations for the core 4IR-relevant emerging technologies (big data, internet of things, artificial intelligence, etc.), countries have developed new IT engineering curricula to prepare engineers for the 4IR. By conducting a structured focused comparison?for?bachelor IT curricula containing core 4IR modules of 57 Vietnamese and 35 Malaysian universities, this researchaims to find appropriate approaches in developing curricula to prepare 4IR competencies for IT engineering students for Malaysia, Vietnam and implications for other nations. The research found that, only new stand-alone curricula with a focus on 4IR competencies can prepare engineers for the 4IR.It then provides seven lessons for designing new 4IR engineering curriculum and for continuing studies on 4IR-ready curriculum.
Respiratory virus laboratory pandemic planning an surveillance in central Viet Nam, 2008-2010
Thomas Tran,Bui Trong Chien,Georgina Papadakis,Julian Druce
Western Pacific Surveillance and Response , 2012,
Abstract: Introduction: Laboratory capacity is needed in central Viet Nam to provide early warning to public health authorities of respiratory outbreaks of importance to human health, for example the outbreak of influenza A(H1N1) pandemic in 2009. Polymerase chain reaction (PCR) procedures established as part of a capacity-building process were used to conduct prospective respiratory surveillance in a region where few previous studies have been undertaken.Methods: Between October 2008 and September 2010, nose and throat swabs from adults and children (approximately 20 per week) presenting with an acute respiratory illness to the Ninh Hoa General Hospital were collected. Same-day PCR testing and result reporting for 13 respiratory viruses were carried out by locally trained scientists.Results: Of 2144 surveillance samples tested, 1235 (57.6%) were positive for at least one virus. The most common were influenza A strains (17.9%), with pandemic influenza A(H1N1) 2009 and seasonal H3N2 strain accounting for 52% and 43% of these, respectively. Other virus detections included: rhinovirus (12.4%), enterovirus (8.9%), influenza B (8.3%), adenovirus (5.3%), parainfluenza (4.7%), respiratory syncytial virus (RSV) (3.9%), human coronavirus (3.0%) and human metapneumovirus (0.3%). The detection rate was greatest in the 0–5 year age group. Viral co-infections were identified in 148 (6.9%) cases.Discussion: The outbreak in 2009 of the influenza A(H1N1) pandemic strain provided a practical test of the laboratory’s pandemic plan. This study shows that the availability of appropriate equipment and molecular-based testing can contribute to important individual and public health outcomes in geographical locations susceptible to emerging infections.
Laguerre polynomials and the inverse Laplace transform using discrete data
Tran Ngoc Lien,Dang Duc Trong,Alain Pham Ngoc Dinh
Mathematics , 2007, DOI: 10.1016/j.jmaa.2007.04.066
Abstract: We consider the problem of finding a function defined on $(0,\infty)$ from a countable set of values of its Laplace transform. The problem is severely ill-posed. We shall use the expansion of the function in a series of Laguerre polynomials to convert the problem in an analytic interpolation problem. Then, using the coefficients of Lagrange polynomials we shall construct a stable approximation solution.
Combinatorial characterizations of the Cohen-Macaulayness of the second power of edge ideals
Do Trong Hoang,Nguyen Cong Minh,Tran Nam Trung
Mathematics , 2013,
Abstract: Let $I(G)$ be the edge ideal of a simple graph $G$. In this paper, we will give sufficient and necessary combinatorial conditions of $G$ in which the second symbolic and ordinary power of its edge ideal are Cohen-Macaulay (resp. Buchsbaum, generalized Cohen-Macaulay). As an application of our results, we will classify all bipartite graphs in which the second (symbolic) powers are Cohen-Macaulay (resp. Buchsbaum, generalized Cohen-Macaulay).
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