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| 1 | 振动压路机用于不同土壤地面的平顺性评价显示文摘实际工况中振动压路机车轮会在各种土壤地面上作业和行驶,为了评价振动式压路机在不同土壤路面上的行驶平顺性,该文针对车轮―不同土壤地面的接触分析,建立了某单钢轮振动压路机非线性动力学模型;描述了振动轮在弹塑性土壤下压实对前车架产生垂直激励力。基于AdamD和KopfF的弹塑性土壤模型,建立了振动轮在作业时的三自由度振动模型;采用软性土壤地面的Bekker假设,建立了轮胎―变形土壤地面接触模型。对建立的非线性动力学模型进行了仿真,并根据ISO2631-1:1997(E)标准分析与评价了不同路况、工况和速度对驾驶员乘坐舒适性的影响。结果表明,刚性路面不平度等级对振动压路机行驶平顺性有较大影响,路面等级越差,驾驶员的主观感觉越不舒适;路面的变形对驾驶室水平晃动有较大影响,土壤路面越软,驾驶室晃动越大;弹塑性土壤对振动压路机的影响表现在低频工况压实时,车辆平顺性比较差。该研究可为振动式压路机的平顺性设计提供参考。 | Le Van Quynh 张建润 刘晓波 王园 P.V.Thoan | 2013 | 农业工程学报2013，29，9： | 10 |
| 2 | 基于三维动力学模型的重型卡车动态参数对平顺性的影响显示文摘为了研究重型卡车动态参数对驾驶员舒适性的影响,以路面随机不平度为激扰,以驾驶室座椅垂向、驾驶室的俯仰角和侧倾角的加权加速度均方根值为目标函数,建立了13自由度的三维动力学模型.采用Matlab/Simulink软件对整车模型进行仿真计算,分析了不同系统参数,如悬架、轮胎、驾驶室悬架和驾驶员座椅悬架的参数对驾驶员座椅垂向振动、驾驶室前后和左右晃动的影响.研究结果表明:悬架系统中刚度和阻尼参数的最佳匹配对车辆平顺性的影响非常明显;随着悬架系统和轮胎刚度的增加,车辆平顺性从优向劣转变,而随着悬架系统阻尼的增加,车辆平顺性呈现从劣转优现象.该研究为重型卡车悬架系统设计提供相应的理论依据. | Le Van Quynh 张建润 王园 孙小娟 Nguyen Van Liem | 2013 | 东南大学学报(自然科学版)2013，43，4： | 6 |
| 3 | Vibration analysis and optimal design for cab's isolation system of vibratory roller显示文摘 | Le Van Quynh Jianrun zhang Guowang Jiao | 2011 | Advanced Material Research2011，，199200： | 1 |
| 4 | First SHRIMP U–Pb zircon dating of granulites from the Kontum massif (Vietnam) and tectonothermal implications显示文摘 | Tran Ngoc Nam Yuji Sano Kentaro Terada Mitsuhiro Toriumi Phan Van Quynh Le Tien Dung | 2001 | Journal of Asian Earth Sciences2001，，1： | 1 |
| 5 | Application of GIS and Modelling in Health Risk Assess- ment for Urban Road Mobility 显示文摘 | Van - Hieu Vu Xuan - Quynh Le Ngoc - Ho Pham | 2013 | Environmental Science and Pollution Research2013，20，8： | 1 |
| 6 | Cytotoxic prenylated flavonoids from Morus alba显示文摘 | Nguyen Tien Dat Phung Thi Xuan Binh Le Thi Phuong Quynh Chau Van Minh Hoang Thanh Huong Jung Joon Lee | 2010 | Fitoterapia2010，，8： | 1 |
| 7 | Development of the layer-by-layer biosensor using graphene films: application for cholesterol determination显示文摘 | Hai Binh Nguyen Van Chuc Nguyen Van Tu Nguyen Huu Doan Le Van Quynh Nguyen Thi Thanh Tam Ngo Quan Phuc Do Xuan Nghia Nguyen Ngoc Minh Phan Dai Lam Tran | 2013 | Advances in Natural Sciences: Nanoscience and Nanotechnology2013，，1： | 1 |
| 8 | Novel Time Series Bagging Based Hybrid Models for Predicting Historical Water Levels in the Mekong Delta Region, Vietnam显示文摘Water level predictions in the river,lake and delta play an important role in flood management.Every year Mekong River delta of Vietnam is experiencing flood due to heavy monsoon rains and high tides.Land subsidence may also aggravate flooding problems in this area.Therefore,accurate predictions of water levels in this region are very important to forewarn the people and authorities for taking timely adequate remedial measures to prevent losses of life and property.There are so many methods available to predict the water levels based on historical data but nowadays Machine Learning(ML)methods are considered the best tool for accurate prediction.In this study,we have used surface water level data of 18 water level measurement stations of the Mekong River delta from 2000 to 2018 to build novel time-series Bagging based hybrid ML models namely:Bagging(RF),Bagging(SOM)and Bagging(M5P)to predict historical water levels in the study area.Performances of the Bagging-based hybrid models were compared with Reduced Error Pruning Trees(REPT),which is a benchmark ML model.The data of 19 years period was divided into 70:30 ratio for the modeling.The data of the period 1/2000 to 5/2013(which is about 70%of total data)was used for the training and for the period 5/2013 to 12/2018(which is about 30%of total data)was used for testing(validating)the models.Performance of the models was evaluated using standard statistical measures:Coefficient of Determination(R2),Root Mean Square Error(RMSE)and Mean Absolute Error(MAE).Results show that the performance of all the developed models is good(R2>0.9)for the prediction of water levels in the study area.However,the Bagging-based hybrid models are slightly better than another model such as REPT.Thus,these Bagging-based hybrid time series models can be used for predicting water levels at Mekong data. | Nguyen Thanh Hoan Nguyen Van Dung Ho Le Thu Hoa Thuy Quynh Nadhir Al-Ansari Tran Van Phong Phan Trong Trinh Dam Duc Nguyen Hiep Van Le Hanh Bich Thi Nguyen Mahdis Amiri Indra Prakash Binh Thai Pham | 2022 | Computer Modeling in Engineering & Sciences2022，，6： | 0 |
| 9 | Calibration of a neutron dose rate meter in various neutron standard fields显示文摘This paper presents the calibration of a neutron dose rate meter and the evaluation of its calibration factors(CFs)in several neutron standard fields(i.e.,two standard fields with bare sources of252Cf and241Am-Be,and five simulated workplace fields with241Am-Be moderated sources).The calibration in standard fields with bare sources was conducted by following the recommendations of the ISO 8529 standard.The measured total neutron ambient dose equivalent rates,denoted as H*(10)tot,were analyzed to obtain direct components,denoted as H*(10)dir,using a reduced fitting method.The CF was then calculated as the ratio between the conventional true value of the neutron ambient dose equivalent rate in a free field,denoted as H*(10)FF,and the value of H*(10)dir.In contrast,in the simulated workplace neutron fields,the calibration of the neutron dose rate meter was conducted by following the ISO 12789 standard.The CF was calculated as the ratio between the values of H*(10)totmeasured by a standard instrument(i.e.,Bonner sphere spectrometer)and the neutron dose rate meter.The CF values were obtained in the range of 0.88–1.0.The standard uncertainties(k=1)of the CFs were determined to be in the range of approximately 6.6–13.1%. | Tuan Khai Nguyen Hoai-Nam Tran Quynh Ngoc Nguyen Thi My Linh Dang Van Loat Bui Thiansin Liamsuwan Ngoc-Thiem Le | 2020 | Nuclear Science and Techniques2020，31，6： | 0 |
| 10 | Detection and localization of the hemoglobin and collagen distribution of the uterine cervix显示文摘Changes of the blood vessels and collagen are associated with the development of abnormal cervical cells.Recently,optical coberence tomography and Mueller polarization images were 1used to provide information regarding the presence of collagen fibers in the cervical tissue.However,most of these methods need a lot of time for image recording and are expensive.In addition,the general survey on the absorption and distribution characteristics of collagen and blood in the cervical is still lacking.In this study,we developed a colposcopy combining cross-polarized inage and image procssing algorithm with an fficient analytical model to map the distribution of blood and collagen in the uterine.For this system's proof of concept,we captured and processed the case of cervical ectopy and Nabothian cyst.The results show that the distribution of blood and collagen maps matched with anatomical and physiological when compared with Lugol's iodline images.This technology has some advantages,such as low cost,real time,and can replace the 11se of acetic acid or Lugol's iodine in the future. | Tran Van Tien Nguyen Ngoc Quynh Le Huynh Duc Phan Ngoc Khuong Cat Huynh Quang Linh | 2019 | Journal of Innovative Optical Health Sciences2019，，4： | 0 |
| 11 | Viral co-infections among children with confirmed measles at hospitals in Hanoi,Vietnam,2014显示文摘Objective:To characterize viral co-infections among representative hospitalized measles cases during the 2014 Hanoi outbreak.Methods:Throat swabs were collected from 54 pediatric patients with confirmed measles,and molecular diagnostics performed for 10 additional viral respiratory pathogens(Influenza A/H1N1pdm09;A/H3N2 and influenza B;Parainfluenza 1,2,3;Respiratory Synctial Virus,RSV;human Metapneumovirus,hM PV;Adenovirus and Picornavirus).Results:Twenty-one cases(38.9%) showed evidence of infection with other respiratory viruses:15 samples contained measles plus one additional virus,and 6 samples contained measles plus 2 additional viruses.Adenovirus was detected as a predominant cause of co-infections(13 cases;24.1%),followed by RSV(6 cases;11.1%),A/H1N1pdm09(3 cases;5.6%),PIV3(3 cases;3.7%),Rhinovirus(3 cases;3.7%) and hM PV(1 case;1.96%).Conclusions:Viral co-infections identified from pediatric measles cases may have contributed to increased disease severity and high rate of fatal outcomes.Optimal treatment of measles cases may require control of multiple viral respiratory pathogens. | Hang Le Khanh Nguyen Loan Phuong Do Van Thanh Thi Trieu Son Vu Nguyen Phuong Vu Mai Hoang Hien Thi Pham Thanh Thi Le Huong Thi Thu Tran Cuong Duc Vuong Mai Thi Quynh Le | 2017 | Asian Pacific Journal of Tropical Medicine2017，10，2： | 0 |
| 12 | Rapid and efficient characterization of cervical collagen orientation using linearly polarized colposcopic images显示文摘Collagen provides tissue strength and structural integrity.Quanti fication of the orientated dispersion of collagen fibers is an important factor when studying the mechanical properties of the cervix.In this study,for the first time,a new method for rapid characterization of the collagen fiber orientations of the cervix using linearly polarized light colposcopy is presented.A total of 24 colposcopic images were captured using a cross-polarized imaging system with white LED light sources.In the preprocessing stage,the Red channel of the RGB image was chosen,which contains no information of the blood vessels because of the low-absorption of blood cells in the red region.OrientationJ,which is an ImageJ plug-in,was used to estimate the local orientation of the collagen fibers.The result shows that in the nonpregnant cervix,the middle zone(Zone 2)has circumferentially aligned collagen fibers while the inner zone(Zone 1)has randomly arranged.The collagen fiber dispersion in Zone 2 is much smaller than that in Zone 1 at all four quadrants region(anterior,posterior,left,and right quadrant).This new analysis technique could potentially combine with diagnostic tools to provide a quantitative platform of collagen fibers in the clinic. | Cat Phan Ngoc Khuong Dung Nguyen Huu Quang Hai Pham Thanh Long Nguyen Quynh Nguyen Ngoc Duc Le Huynh Tien Tran Van Tu Ly Anh | 2023 | Journal of Innovative Optical Health Sciences2023，16，5： | 0 |
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