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| 1 | 基于ENVISAT ASAR数据的水稻估产方案显示文摘水稻多生长在温暖潮湿的多云多雨地区,使雷达遥感成为水稻遥感监测的重要手段之一.因此,提出应用多时相、多极化ENVISAT ASAR数据进行区域水稻估产的方案.首先利用ASAR数据进行水稻制图,提取水稻种植分布图和多时相水稻后向散射系数.随后,基于像元尺度,采用同化估产方法,以LAI为结合点,将水稻作物模型ORYZA2000与半经验水稻后向散射模型结合,建立嵌套模型模拟多时相水稻后向散射系数.对ORYZA2000模型进行参数敏感性分析,选择水稻出苗期和播种密度为参数优化对象.利用全局优化算法SCE-UA对优化参数进行重新初始化,以使模拟的水稻后向散射系数与实测值误差最小,并利用优化后的ORYZA2000模型计算每个像元的水稻产量,生成区域的水稻产量分布图.最后,使用2006年在中国兴化地区进行的水稻同步试验数据对该方案进行了验证.结果表明,由于采用潜在生长条件模拟,模拟的水稻产量明显高于实测产量,其平均值比实际情形高约13,根均方误差达到1133kg/hm2,但获取的水稻产量分布图能够描绘研究区水稻实际产量的分布趋势.由此可见,该方案为多云多雨地区的水稻遥感监测提供了重要参考. | 申双和 杨沈斌 李秉柏 谭炳香 李增元 Le Toan Thuy | 2009 | 中国科学(D辑)2009，，6： | 11 |
| 2 | Genetic variants of interferon regulatory factor 5 associated with chronic hepatitis B infection显示文摘AIM To investigate possible effects of IRF5 polymorphisms in the 3' UTR region of the IFR5 locus on susceptibilityto hepatitis B virus(HBV) infection and progression of liver diseases among clinically classified Vietnamese patients.METHODS Four IFR5 SNPs(rs13242262 A/T, rs77416878 C/T, rs10488630 A/G, and rs2280714 T/C) were genotyped in clinically classified HBV patients [chronic hepatitis B(CHB). n = 99; liver cirrhosis(LC), n = 131; hepatocellular carcinoma(HCC), n = 149] and in 242 healthy controls by direct sequencing and Taq Man realtime PCR assays. RESULTS Comparing patients and controls, no significant association was observed for the four IFR5 variants. However, the alleles rs13242262 T and rs10488630 G contributed to an increased risk of liver cirrhosis(LC vs CHB: OR = 1.5, 95%CI: 1.1-2.3, adjusted P = 0.04; LC vs CHB: OR = 1.7, 95%CI: 1.1-2.6, adjusted P = 0.019). Haplotype IRF5*TCGT constructed from 4 SNPs was observed frequently in LC compared to CHB patients(OR = 2.1, 95%CI: 1.2-3.3, adjusted P = 0.008). Haplotype IRF5*TCAT occurred rather among CHB patients than in the other HBV patient groups(LC vs CHB: OR = 0.4, 95%CI: 0.2-0.8, adjusted P = 0.03; HCC vs CHB: OR = 0.3, 95%CI: 0.15-0.7, adjusted P = 0.003). The IRF5*TCAT haplotype was also associated with increased levels of ALT, AST and bilirubin. CONCLUSION Our study shows that IFR5 variants may contribute as a host factor in determining the pathogenesis in chronic HBV infections. | Bui Tien Sy Nghiem Xuan Hoan Hoang Van Tong Christian G Meyer Nguyen Linh Toan Le Huu Song Claus-Thomas Bock Thirumalaisamy P Velavan | 2018 | World Journal of Gastroenterology2018，24，2： | 9 |
| 3 | A scheme for regional rice yield estimation using ENVISAT ASAR data显示文摘Information on rice growing areas and rice production is critical for most rice growing countries to make state and economic policies. However, the areas where rice crop is cultivated are often cloudy and rainy, which entails the use of radar remote sensing data for rice monitoring. In this paper, a practical scheme to integrate multi-temporal and multi-polarization ENVISAT ASAR data into rice crop model for regional rice yield estimation has been presented. To achieve this, rice distribution information should be obtained first by rice mapping method to retrieve rice fields from ASAR images, and then an assimilation method is applied to use the observed multi-temporal rice backscattering coefficients which are grouped for each rice pixel to re-initialize ORYZA2000 to predict rice yield. The assimilation method re-initializes the model with optimal input parameters, allowing a better temporal agreement between the rice backscattering coefficients retrieved from ASAR data and the rice backscattering coefficients simulated by a coupled model, i.e., the combination of ORYZA2000 and a semi-empirical rice backscatter model through LAI. The SCE-UA optimization algorithm is employed to determine the optimal set of input parameters. After the re-initialization, rice yield for each rice pixel is calculated, and the yield map over the area of interest is produced. The scheme was validated over Xinghua study area located in the middle of Jiangsu Province of China by using the data set of an experimental campaign carried out during the 2006 rice season. The result shows that the obtained rice yield map generally overestimates the actual rice production by 13% on average and with a root mean square error of approximately 1133 kg/ha on validation sites, but the tendency of rice growth status and spatial variation of the rice yield are well predicted and highly consistent with the actual production variation. | LE TOAN Thuy | 2009 | Science China Earth Sciences2009，52，8： | 7 |
| 4 | Relationship between skin fold thickness and insulin resistance in the essential hypertensive patients in Vietnam显示文摘Previous studies reported a close relationship between obesity and insulin resistance in the essential hypertensive patients. Objective In this study, we examined the relationship between the skin fold thickness and insulin resistance then developed a formula to estimate the insulin resistance index according to the skin fold thickness in the essential hypertensive patients. Subjects and Methods Medical records of 80 patients (37 males, 43 females) were reviewed and the data were tabulated. Anthropometric indexes (including height, weight, waist circumference, hip circumference, and skins fold thickness at 5 fatty difference points on the Erdheim diagram), fasting plasma glucose and insulin concentration were recorded. The mean age was 57.0±9.2 years. The insulin resistance index was calculated following the Homeostasis Model Assessment (HOMA) formula. Results Compared with the group with BMI<23kg/m2, the group with BMI≥23 kg/m2 had higher fasting insulin concentration (8.85 ± 4.97 pmol/L vs 15.60 ± 8.70 pmol/L, P<0.001 ) and higher insulin resistance index in (2.15±1,24 vs 3.76±2.22, P<0.001). No significant difference in fasting plasma insulin concentration,insulin resistance index between male and female was observed (P>0.05). There was a positive correlation between skin fold thickness and the fasting insulin concentration and insulin resistance index. The skin fold thickness at point A8 had the best coefficient correlated with fasting plasma insulin(r=0.79, P<0.001) and insulin resistance index (r= 0.79, P < 0.001). A formula to estimate the insulin resistance index by skin fold thickness at point A8 as: Insulin resistance index = 0.12 × [skin fold thickness at A8 point (mm)] - 1.Conclusion: In the essential hypertensive patients, the formula to estimate insulin resistance index as 0.12 × [skin fold thickness at A8 point (mm)]-1 may predict accurately the level of insulin resistance. | Toan C Nguyen Khoa TA Pham Quyen TL Do Cuong T Nguyen Diep D Nguyen Vinh G Le Cong D Nguyen | 2005 | Journal of Geriatric Cardiology2005，2，4： | 4 |
| 5 | Radiographic and Clinical Comparisons of Distal Tibia Shaft Fractures (4 to 11 cm Proximal to the Plafond): Plating Versus Intramedullary Nailing显示文摘 | Heather A Vallier T Toan Le Asheesh Bedi | 2008 | Journal of Orthopaedic Trauma2008，，5： | 2 |
| 6 | Synthesis of cation exchange resin-supported iron and magnesium oxides/hydroxides composite for nitrate removal in water显示文摘In this study,we reported on the concept and practical use of cation exchange resin(CER)for removing anions in water via pretreating the CER with metal salts.The cation exchange resinsupported iron and magnesium oxides/hydroxides composite(FeMg/CER)was synthesized and introduced as a new and potential adsorbent for selective removal of nitrate ion in the water environment.Characteristics of FeMg/CER were determined by techniques such as Fouriertransform infrared spectroscopy,scanning electron microscopy,and Xray diffraction.The results showed that FeMg/CER material had a high nitrate adsorption capacity of 200 mg NO_(3)^()·g^(1)with a fast equilibrium adsorption time of 30 min at pH 5.In addition,it had good durability of at least 10 times of regeneration,which could be applied to practical water and wastewater treatment. | Trung Thanh Nguyen Vu Anh Khoa Tran Le Ba Tran Phuoc Toan Phan Minh Tan Nguyen Long Giang Bach Surapol Padungthon Cong Khiem Ta Nhat Huy Nguyen | 2021 | Chinese Journal of Chemical Engineering2021，34，4： | 2 |
| 7 | Ecoregional variations of aboveground biomass and stand structure in evergreen broadleaved forests显示文摘Biotic and abiotic factors control aboveground biomass(AGB)and the structure of forest ecosystems.This study analyses the variation of AGB and stand structure of evergreen broadleaved forests among six ecoregions of Vietnam.A data set of 1731-ha plots from 52 locations in undisturbed old-growth forests was developed.The results indicate that basal area and AGB are closely correlated with annual precipitation,but not with annual temperature,evaporation or hours of sunshine.Basal area and AGB are positively correlated with trees>30 cm DBH.Most areas surveyed(52.6%)in these old-growth forests had AGB of 100–200 Mg ha^-1;5.2%had AGB of 400–500 Mg ha^-1,and 0.6%had AGB of>800 Mg ha^-1.Seventy percent of the areas surveyed had stand densities of 300–600 ind.ha^-1,and 64%had basal areas of 20–40 m^2 ha^-1.Precipitation is an important factor influencing the AGB of old-growth,evergreen broadleaved forests in Vietnam.Disturbances causing the loss of large-diameter trees(e.g.,>100 cm DBH)affects AGB but may not seriously affect stand density. | Tran Van Do Mamoru Yamamoto Osamu Kozan Vo Dai Hai Phung Dinh Trung Nguyen Toan Thang Lai Thanh Hai Vu Thanh Nam Trieu Thai Hung Hoang Van Thang Tran Duc Manh Cao Chi Khiem Vu Tien Lam Nguyen Quang Hung Tran Hoang Quy Pham Quang Tuyen Trinh Ngoc Bon Nguyen Thi Thu Phuong Ninh Viet Khuong Nguyen Van Tuan Dang Thi Hai Ha Tran Hai Long Dang Van Thuyet Dang Thinh Trieu Nguyen Van Thinh Tran Anh Hai Duong Quang Trung Nguyen Van Bich Dinh Hai Dang Pham Tien Dung Nguyen Huy Hoang Le Thi Hanh Phan Minh Quang Nguyen Thi Thuy Huong Hoang Thanh Son Nguyen Thanh Son Nguyen Thi Van Anh Nguyen Thi Hoai Anh Pham Dinh Sam Hoang Thi Nhung Hoang Van Thanh Nguyen Huu Thinh Tran Hong Van Ho Trung Luong Bui Kieu Hung | 2020 | Journal of Forestry Research2020，31，5： | 1 |
| 8 | Monitoring of the rice cropping system in the Mekong Delta using ENVISAT/ASAR dual polarization data显示文摘 | Bouvet A Le Toan T Lam-Dao N | 2009 | IEEE Transactions on Geoscience and Remote Sensing2009，47，2： | 1 |
| 9 | The effect of surface roughness on multifrequency polarimetric SAR data显示文摘 | Mattia F Le Toan T Souyris J C | 1997 | IEEE Transactions on Geoscience and Remote Sensing1997，35，4： | 1 |
| 10 | Subtrochanteric femur fractures 显示文摘 | Bedi A Toan Le T | 2004 | Orthop Clin North Am2004，35，4： | 1 |
| 11 | Remote sensing of spring phenology in boreal regions:A free of snow-effect method using NOAA-AVHRR and SPOT-VGT data(1982-2004)显示文摘 | DELBART N LE TOAN T KERGOAT L | 2006 | Remote Sensing of En-vironment2006，101，： | 1 |
| 12 | Impact of the hepatitis B virus genotype and genotype mixtures on the course of liver disease in Vietnam 显示文摘 | Toan N L Song Le H Kremsner P G Duy D N Binh V Q Koeberlein B | 2006 | Hepatology2006，43，： | 1 |
| 13 | The BIOMASS mission : Mapping global forest biomass to better understand the terres- trial carbon cycle 显示文摘 | LE TOAN T QUEGAN S DAVIDSON M W J | 2011 | Remote Sensing of Environment2011，115，11： | 1 |
| 14 | Radiographic and Clinical Comparisons of Distal Tibia Shaft Fractures (4 to 11 cm Proximal to the Plafond): Plating Versus Intramedullary Nailing显示文摘 | Heather A Vallier T Toan Le Asheesh Bedi | 2008 | Journal of Orthopaedic Trauma2008，，5： | 1 |
| 15 | Subtrocbanteric femur fractures 显示文摘 | Bedi A Toan Le T | 2004 | Or- thop Clin North Am2004，35，24： | 1 |
| 16 | Subtrochanteric femur fractures显示文摘 | Bedi A Toan Le T | 2004 | Orthop Clin Nort tl (Am)2004，35，1： | 1 |
| 17 | Forest modeling for height inversion using single-baseline InSAR/Pol-InSAR data显示文摘 | Garestier F and Le Toan T | 2010 | IEEE Transactions on Geoscience and Remote Sensing2010，48，3： | 1 |
| 18 | Estimation of the backscatter vertical profile of a pine forest using single baseline P-band (Pol-)InSAR data显示文摘 | Garestier F and Le Toan T | 2010 | IEEE Transactions on Geoscience and Remote Sensing2010，48，9： | 1 |
| 19 | Impact of the hepatitis B virus genotype and genotype mixtures on the course of liver disease in Vietnam 显示文摘 | Toan N L Song Le H Kremsner P G Duy D N Binh V Q Koeberlein B | 2006 | Hepatology2006，43，： | 1 |
| 20 | Biomass quantification of Andean wetland forages using ERS satellite SAR data for optimizing livestock management显示文摘 | Moreau S Le Toan T | 2003 | Remote Sensing of Environment2003，84，4： | 1 |
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