Groundwater(GW)is a vital freshwater resource extensively exploited in the Vietnamese Mekong Delta,especially during the dry seasons.This study applies the Cumulative Rainfall Departure(CRD)method to estimate GW recha...Groundwater(GW)is a vital freshwater resource extensively exploited in the Vietnamese Mekong Delta,especially during the dry seasons.This study applies the Cumulative Rainfall Departure(CRD)method to estimate GW recharge in deep aquifers of Soc Trang Province,located in the southernmost region of Vietnam under a tropical climate.Monthly rainfall records and daily GW level data of the aquifers from 2010 to 2020 were used.The Pearson correlation between observed GW levels and CDR model GW levels exceeds 0.995,indicating high model accuracy.The analysis reveals that the CRD fractions for the Upper Pleistocene(qp3),Middle Pleistocene(qp2-3),Lower Pleistocene(qp1),and Middle Pliocene(n22)aquifers are 0.085%,0.104%,0.130%,and 0.180%,respectively,totaling approximately 0.5%of the annual rainfall.This corresponds to an annual GW recharge of 25.86 million m3,or 70,850 m3/day,equivalent to 70%of the current GW abstraction rate of 101,000 m3/day.Given the critical role of GW as a freshwater source,implementing an enhanced GW recharge program using surface water and rainwater is strongly recommended.Additionally,the analysis suggests that the decline in GW levels due to abstraction corresponds to 0.85 times the mean annual precipitation,a finding that warrants further investigation.展开更多
Ten new species of the spider family Theridiidae Sundevall,1833 from China and Vietnam are described:Chrysso shantinggui sp.nov.(♂♀),Gushangzao andaoquan sp.nov.(♂),Moneta oupeng sp.nov.(♂♀),Phycosoma yanshun sp....Ten new species of the spider family Theridiidae Sundevall,1833 from China and Vietnam are described:Chrysso shantinggui sp.nov.(♂♀),Gushangzao andaoquan sp.nov.(♂),Moneta oupeng sp.nov.(♂♀),Phycosoma yanshun sp.nov.(♂♀),Spinembolia gaofani sp.nov.(♀),S.jiangjing sp.nov.(♂♀),S.lingzhen sp.nov.(♂♀),Stemmops dengfei sp.nov.(♂♀),Takayus xiaorang sp.nov.(♂♀),Yaginumena weidingguo sp.nov.(♀).The unknown sexes of Allothymoites sculptilis Gao&Li,2014,Gyro zeppeli Lin&Li,2024,Parasteatoda longiducta Zhu,1998 are described for the first time.展开更多
Our study aimed to compare the essential oil(EO)concentration and composition of several Apiaceae species growing in the Northern region of Vietnam.The yields of EOs from materials ranged from 0.03%(root EO of Angelic...Our study aimed to compare the essential oil(EO)concentration and composition of several Apiaceae species growing in the Northern region of Vietnam.The yields of EOs from materials ranged from 0.03%(root EO of Angelica acutiloba and aerial parts EO of Heracleum bivittatum)-0.27%(leaf EO of Xyloselinum vietnamense).Gas chromatography-mass spectrometry(GC-MS)allowed the identification of 74 components in the EOs of six Apiaceae species,making up 94.4%–100.0%of the oils.In EO from Angelica acutiloba,(Z)-ligustilide accounted for an extremely large proportion(94.9%).EO of Angelica pubescens was dominated by six character-istic components includingα-pinene(21.5%),β-phellandrene(18.1%),p-cymene(12.2%),3-methylnonane(8.7%),o-cymene(8.1%),and D-sylvestrene(6.2%).The EO from Cryptotaenia japonica was characterized by high amounts ofα-selinene(48.7%),β-selinene(23.7%),and trans-β-farnesene(5.4%).The EOs from leaves and stems of Xyloselinum vietnamense were characterized by high concentrations of sabinene(69.8%and 33.8%),4-terpineol(8.7%and 7.4%)andβ-pinene(4.0%and 6.5%)while EOs from aerial parts and root of Xylo-selinum leonidii comprise four characteristic monoterpenes includingα-pinene(28.2%and 52.8%),β-pinene(7.9%and 10.3%),β-phellandrene(7.6%and 15.3%),and sabinene(3.0%and 4.1%).Additionally,cryptone is also one of the major components in the EO of Xyloselinum leonidii(13.2%in the aerial parts oil and 2.8%in the root oil).In the EOs isolated from the aerial parts and root of Heracleum bivittatum,α-pinene(22.5%and 70.2%)andβ-pinene(43.2%and 20.0%)were the predominant monoterpenes.Sabinene appeared in the EO from aerial parts of Heracleum bivittatum with a relatively high concentration(13.5%)while bornyl acetate(5.1%)was also one of the main components in the EO from its aerial parts but was not detected in other Apiaceae species in the present study.These databases help identify and control the quality of plant material studied from the family Apiaceae growing in Vietnam.展开更多
Objective:To identify inhibitors of nitric oxide production and NF-κB activity from Chromolaena odorata（C.odorata）.Methods:The compounds isolated from the aerial parts of C.odorata by bioassay-guided fractionation ...Objective:To identify inhibitors of nitric oxide production and NF-κB activity from Chromolaena odorata（C.odorata）.Methods:The compounds isolated from the aerial parts of C.odorata by bioassay-guided fractionation were investigated for their inhibitory effects on the NO production and NF-κB activity in LPS-stimulated RAW264.7 cells.Results:Six fatty acids （S）-coriolic acid（1）,（S）-coriolic acid methyl ester（2）,（5）-15,16-didehydrocoriolic acid（3）,（S）- 15,16-didehydrocoriolic acid methyl ester（4）,linoleamide（5） and linolenamide（6） were isolated. All compounds inhibited the NO production at concentrations consistent with those required for NF-κB inhibition.Compound 2 was the most active with the IC<sub>50</sub> values of 5.22 and 5.73μM. The addition of a double bond in the fatty chain decreased the inhibitory effects while the methyl esterification increased the activities.Conclusions:The fatty acid components in C.odorata with NF-κB inhibitory activity could explain the anti-inflammation property of this plant in traditional medicine.This study could also contribute to the better use of C.odorata for human health care.展开更多
Piaoac granites exposed in the Cao Bang region, northern Vietnam, are S-type granite, which are associated with W-Sn-Mo-Be-F mineralization. Zircon U-Pb ages, major and trace elements, mineral chemical and Hf isotopic...Piaoac granites exposed in the Cao Bang region, northern Vietnam, are S-type granite, which are associated with W-Sn-Mo-Be-F mineralization. Zircon U-Pb ages, major and trace elements, mineral chemical and Hf isotopic compositions of the W-Sn-bearing granites from the Piaoac District have been investigated in detail. LA-ICP-MS U-Pb dating of zircon grains from these granites yielded ages of 82.5±2.3 and 82±1.8 Ma, representing an episode of Late Cretaceous magmatic event. These granites are characterized by high peraluminous and have typical S-type geochemical signatures with high SiO_2(72.37 wt.%–73.07 wt.%), high A/CNK values(1.61–1.65) and Al_2O_3(14.4 wt.%–15 wt.%). They are enriched in Rb, U, K, Th, Ta and Pb and display pronounced negative Ba, Sr, Nb, Ti and Eu(Eu/Eu*=0.19–0.24) anomalies. The high degree of fractional crystallization is characterized by low Rb, Sr, Ba and Eu concentrations with high ratios of La/Sm and Eu/Eu*. Zircon grains show εHf(t) values from-9.69 to-0.9 and the corresponding TDM2 range from 1.2 to 1.7 Ga, indicating that these granites could be derived from the Proterozoic basement rocks with minor input from mantle-derived magmas. The calculation of Fe^(3+) and Fe^(2+) of biotites indicates a low oxygen fugacity condition(log fO_2 ranging from 10-17 to 10-18 bars, below MH), which is favorable for the W-Sn mineralization. Tungsten and tin have been enriched in granitic magmas through fractionation, and low oxygen fugacity conditions have promoted the accumulation and transportation of W-Sn in the hydrothermal fluids, leading to deposition of mineral phases. The geochemical data suggest that Piaoac granites formed in an extensional setting related with the Late Cretaceous magmatism occurring large-scale lithospheric extensional in South China Block.展开更多
Taxus chinensis and T. wallichiana in have been threatened in their distribution areas in recent decades because of their over-exploitation and reduction and destruction of native habitats. Determining the genetic div...Taxus chinensis and T. wallichiana in have been threatened in their distribution areas in recent decades because of their over-exploitation and reduction and destruction of native habitats. Determining the genetic diversity in populations of the two species will provide guidelines for their protection and preservation. Two hundred and fifteen trees from six populations of T. chinensis and150 sampled trees of T. wallichiana were sampled. Six microsatellite primer pairs selected from 16 primer pairs were used to investigate genetic variation at the population and species levels. Five yielded polymorphic alleles, and among the 13 putative alleles amplified, 11 were polymorphic（accounting for 76.33 %）.Shannon＇s information index（I） and percentage of polymorphic bands（PPB）（I = 0.202 and PPB = 67.22 % for T. chinensis; I = 0.217 and PPB = 65.03 % for T. wallichiana）. Both species had low levels of genetic diversity（mean Ho= 0.107, He= 0.121 for T. chinensis; Ho= 0.095, He= 0.109 for T. wallichiana）. Genetic differentiation among populations was higher（FST= 0.189） for T. chinensis and lower（0.156） for T.wallichiana, indicating limited gene flow（Nm） among populations for T. chinensis（0.68） and T. wallichiana（0.65）.Variation among individuals of T. chinensis was 63.59 and73.12 % for T. wallichiana. Thus, the threatened status of the two conifers is related to a lack of genetic diversity. All populations are isolated in small forest remnants. An ex situ conservation site should be established with a new population for these species that comprises all the genetic groups for the best chance to improve their fitness under environmental stresses.展开更多
In this paper, we will present new results on robust finite-time H∞ control for linear time-varying systems with both time-varying delay and bounded control. Delay-dependent sufficient conditions for robust finite-ti...In this paper, we will present new results on robust finite-time H∞ control for linear time-varying systems with both time-varying delay and bounded control. Delay-dependent sufficient conditions for robust finite-time stabilization and H∞ control are first established to guarantee finite-time stability of the closed-loop system via solving Riccati differential equations. Applications to finite-time H∞ control to a class of linear autonomous time-delay systems with bounded control are also discussed in this paper.Numerical examples are given to illustrate the effectiveness of the proposed method.展开更多
Ben Tre<span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> located in the Mekong Delta, is one of the most places affected by climate change, especially...Ben Tre<span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> located in the Mekong Delta, is one of the most places affected by climate change, especially in sea level rise and salinity intrusion. For the seven provinces bordering the East Sea, the need for monitoring water resources is critical. This paper represents an approach to build a web-based GIS to store, manage, analyze and visualize the data of saline intrusion phenomenon. The novelty focuses on automating the workflow for the generation and publication of time series saline intrusion maps on server side. The analysis results are provided on the web browser interface. This helps users access valuable information without having to install professional GIS software. Spatial distribution of saline intrusion and statistical results support government agencies in planning and decision making. This work is funded by Ben Tre Provincial People'</span><span style="font-family:Verdana;">s Committee and Vietnam Academy of Science and Technology (VAST).</span>展开更多
Three new genera of spiders are described:Jishiyu Lin&Li,gen.nov.,of Agelenidae C.L.Koch,1837,with J.songjiang Lin&Li,sp.nov.(♂,China:Yunnan)as the type species,Marusik Lin&Li,gen.nov.,of Gnaphosidae Bank...Three new genera of spiders are described:Jishiyu Lin&Li,gen.nov.,of Agelenidae C.L.Koch,1837,with J.songjiang Lin&Li,sp.nov.(♂,China:Yunnan)as the type species,Marusik Lin&Li,gen.nov.,of Gnaphosidae Banks,1892,with M.yurii Lin&Li,sp.nov.(♂,Vietnam)as the type species and Xiaoliguang Lin&Li,gen.nov.,of Phrurolithidae Banks,1892,with X.huarong Lin&Li,sp.nov.(♂♀,Vietnam)as the type species.Thirty-five new species are described in 12 families:Corinnidae Karsch,1880:Spinirta qishuoi Lin&Li,sp.nov.(♀,China:Guangxi);Hahniidae Bertkau,1878:Cicurina miniae Lin&Li,sp.nov.(♀,Vietnam);Halonoproctidae Pocock,1901:Latouchia wenruni Lin&Li,sp.nov.(♂♀,China:Hainan);Liocranidae Simon,1897:Oedignatha wuyong Lin&Li,sp.nov.(♂♀,Vietnam)and Sphingius gongsunsheng Lin&Li,sp.nov.(♀,Vietnam);Nemesiidae Simon,1889:Sinopesa guansheng Lin&Li,sp.nov.(♂,China:Yunnan);Phrurolithidae Banks,1892:Edelithus huyanzhuo Lin&Li,sp.nov.(♂♀,Vietnam),E.linchong Lin&Li,sp.nov.(♂♀,Vietnam),E.qinming Lin&Li,sp.nov.(♂♀,Vietnam),Grandilithus linglingae Lin&Li,sp.nov.(♂♀,Vietnam),G.yangzhi Lin&Li,sp.nov.(♀,Vietnam),Lingulatus chaijin Lin&Li,sp.nov.(♀,Vietnam),L.dongping Lin&Li,sp.nov.(♂♀,Vietnam),L.liying Lin&Li,sp.nov.(♂♀,Vietnam),L.longfeiae Lin&Li,sp.nov.(♂♀,Vietnam),L.luzhishen Lin&Li,sp.nov.(♂♀,Vietnam),L.zhangqing Lin&Li,sp.nov.(♂♀,Vietnam),L.zhutong Lin&Li,sp.nov.(♂♀,Vietnam),Otacilia liuxinyei Lin&Li,sp.nov.(♂♀,Vietnam),O.wusong Lin&Li,sp.nov.(♂,Vietnam)and O.xuning Lin&Li,sp.nov.(♀,Vietnam);Pimoidae Wunderlich,1986:Pimoa zeluni Lin&Li,sp.nov.(♂,China:Hebei);Salticidae Blackwall,1841:Epeus covid Lin&Li,sp.nov.(♂♀,China:Yunnan);Theridiidae Sundevall,1833:Phoroncidia minlangi Lin&Li,sp.nov.(♀,China:Fujian);Thomisidae Sundevall,1833:Borboropactus nanda Lin&Li,sp.nov.(♂♀,China:Yunnan),Cozyptila haocongi Lin&Li,sp.nov.(♂♀,Vietnam),Lysiteles huyilinae Lin&Li,sp.nov.(♂♀,Vietnam),Massuria daizong Lin&Li,sp.nov.(♂♀,China:Yunnan)and Zametopina wanliae Lin&Li,sp.nov.(♂,Vietnam);Trachelidae Simon,1897:Utivarachna yumaoi Lin&Li,sp.nov.(♂,Vietnam);Zodariidae Thorell,1881:Asceua shuangreni Lin&Li,sp.nov.(♂♀,Vietnam),Cydrela likui Lin&Li,sp.nov.(♂♀,Vietnam),Mallinella lisongi Lin&Li,sp.nov.(♂♀,Vietnam),M.pingzhoui Lin&Li,sp.nov.(♂♀,Vietnam)and M.sena Lin&Li,sp.nov.(♂♀,Vietnam).One genus name and one species name are detected as homonyms and thereby replacement names for the preoccupied names are proposed,in accordance with Article 60 of the International Code of Zoological Nomenclature(ICZN,1999),i.e.,Xilithus Liu&Li,nom.nov.,ex Acrolithus Liu&Li,2022(preoccupied nomen);Araneus xiang Mi&Li,nom.nov.,ex Araneus arcuatus Mi&Li,2022(preoccupied nomen).Therefore,all 16 species of Acrolithus Liu&Li,2022 are transferred to Xilithus Liu&Li,nom.nov.展开更多
基金completed as part of the Research project(CT.2022.01.MDA.02):"Research and evaluation of the role of the hydrogeological and engineering geological factors in the change of the flows and of the coastal area of the Hau River mouth in the southwest region of Vietnam",funded by the Vietnam Ministry of Education and Training.The GW monitoring data used in this study were sourced from BIGDATA,NAWAPI.
文摘Groundwater(GW)is a vital freshwater resource extensively exploited in the Vietnamese Mekong Delta,especially during the dry seasons.This study applies the Cumulative Rainfall Departure(CRD)method to estimate GW recharge in deep aquifers of Soc Trang Province,located in the southernmost region of Vietnam under a tropical climate.Monthly rainfall records and daily GW level data of the aquifers from 2010 to 2020 were used.The Pearson correlation between observed GW levels and CDR model GW levels exceeds 0.995,indicating high model accuracy.The analysis reveals that the CRD fractions for the Upper Pleistocene(qp3),Middle Pleistocene(qp2-3),Lower Pleistocene(qp1),and Middle Pliocene(n22)aquifers are 0.085%,0.104%,0.130%,and 0.180%,respectively,totaling approximately 0.5%of the annual rainfall.This corresponds to an annual GW recharge of 25.86 million m3,or 70,850 m3/day,equivalent to 70%of the current GW abstraction rate of 101,000 m3/day.Given the critical role of GW as a freshwater source,implementing an enhanced GW recharge program using surface water and rainwater is strongly recommended.Additionally,the analysis suggests that the decline in GW levels due to abstraction corresponds to 0.85 times the mean annual precipitation,a finding that warrants further investigation.
基金supported by the Institute of Zoology,Chinese Academy of Sciences(2023IOZ0104)。
文摘Ten new species of the spider family Theridiidae Sundevall,1833 from China and Vietnam are described:Chrysso shantinggui sp.nov.(♂♀),Gushangzao andaoquan sp.nov.(♂),Moneta oupeng sp.nov.(♂♀),Phycosoma yanshun sp.nov.(♂♀),Spinembolia gaofani sp.nov.(♀),S.jiangjing sp.nov.(♂♀),S.lingzhen sp.nov.(♂♀),Stemmops dengfei sp.nov.(♂♀),Takayus xiaorang sp.nov.(♂♀),Yaginumena weidingguo sp.nov.(♀).The unknown sexes of Allothymoites sculptilis Gao&Li,2014,Gyro zeppeli Lin&Li,2024,Parasteatoda longiducta Zhu,1998 are described for the first time.
基金supported by a grant from the Vietnam Academy of Science and Technology,Project Code CSCL09.03/23-24.
文摘Our study aimed to compare the essential oil(EO)concentration and composition of several Apiaceae species growing in the Northern region of Vietnam.The yields of EOs from materials ranged from 0.03%(root EO of Angelica acutiloba and aerial parts EO of Heracleum bivittatum)-0.27%(leaf EO of Xyloselinum vietnamense).Gas chromatography-mass spectrometry(GC-MS)allowed the identification of 74 components in the EOs of six Apiaceae species,making up 94.4%–100.0%of the oils.In EO from Angelica acutiloba,(Z)-ligustilide accounted for an extremely large proportion(94.9%).EO of Angelica pubescens was dominated by six character-istic components includingα-pinene(21.5%),β-phellandrene(18.1%),p-cymene(12.2%),3-methylnonane(8.7%),o-cymene(8.1%),and D-sylvestrene(6.2%).The EO from Cryptotaenia japonica was characterized by high amounts ofα-selinene(48.7%),β-selinene(23.7%),and trans-β-farnesene(5.4%).The EOs from leaves and stems of Xyloselinum vietnamense were characterized by high concentrations of sabinene(69.8%and 33.8%),4-terpineol(8.7%and 7.4%)andβ-pinene(4.0%and 6.5%)while EOs from aerial parts and root of Xylo-selinum leonidii comprise four characteristic monoterpenes includingα-pinene(28.2%and 52.8%),β-pinene(7.9%and 10.3%),β-phellandrene(7.6%and 15.3%),and sabinene(3.0%and 4.1%).Additionally,cryptone is also one of the major components in the EO of Xyloselinum leonidii(13.2%in the aerial parts oil and 2.8%in the root oil).In the EOs isolated from the aerial parts and root of Heracleum bivittatum,α-pinene(22.5%and 70.2%)andβ-pinene(43.2%and 20.0%)were the predominant monoterpenes.Sabinene appeared in the EO from aerial parts of Heracleum bivittatum with a relatively high concentration(13.5%)while bornyl acetate(5.1%)was also one of the main components in the EO from its aerial parts but was not detected in other Apiaceae species in the present study.These databases help identify and control the quality of plant material studied from the family Apiaceae growing in Vietnam.
基金supported by the grant from the International Foundation for Science(No.F/4729-1)
文摘Objective:To identify inhibitors of nitric oxide production and NF-κB activity from Chromolaena odorata（C.odorata）.Methods:The compounds isolated from the aerial parts of C.odorata by bioassay-guided fractionation were investigated for their inhibitory effects on the NO production and NF-κB activity in LPS-stimulated RAW264.7 cells.Results:Six fatty acids （S）-coriolic acid（1）,（S）-coriolic acid methyl ester（2）,（5）-15,16-didehydrocoriolic acid（3）,（S）- 15,16-didehydrocoriolic acid methyl ester（4）,linoleamide（5） and linolenamide（6） were isolated. All compounds inhibited the NO production at concentrations consistent with those required for NF-κB inhibition.Compound 2 was the most active with the IC<sub>50</sub> values of 5.22 and 5.73μM. The addition of a double bond in the fatty chain decreased the inhibitory effects while the methyl esterification increased the activities.Conclusions:The fatty acid components in C.odorata with NF-κB inhibitory activity could explain the anti-inflammation property of this plant in traditional medicine.This study could also contribute to the better use of C.odorata for human health care.
基金supported by the National Key R & D Program of China (No. 2016YFC0600404)the National Natural Science Foundation of China (Nos. 41673040 and 41611540339)
文摘Piaoac granites exposed in the Cao Bang region, northern Vietnam, are S-type granite, which are associated with W-Sn-Mo-Be-F mineralization. Zircon U-Pb ages, major and trace elements, mineral chemical and Hf isotopic compositions of the W-Sn-bearing granites from the Piaoac District have been investigated in detail. LA-ICP-MS U-Pb dating of zircon grains from these granites yielded ages of 82.5±2.3 and 82±1.8 Ma, representing an episode of Late Cretaceous magmatic event. These granites are characterized by high peraluminous and have typical S-type geochemical signatures with high SiO_2(72.37 wt.%–73.07 wt.%), high A/CNK values(1.61–1.65) and Al_2O_3(14.4 wt.%–15 wt.%). They are enriched in Rb, U, K, Th, Ta and Pb and display pronounced negative Ba, Sr, Nb, Ti and Eu(Eu/Eu*=0.19–0.24) anomalies. The high degree of fractional crystallization is characterized by low Rb, Sr, Ba and Eu concentrations with high ratios of La/Sm and Eu/Eu*. Zircon grains show εHf(t) values from-9.69 to-0.9 and the corresponding TDM2 range from 1.2 to 1.7 Ga, indicating that these granites could be derived from the Proterozoic basement rocks with minor input from mantle-derived magmas. The calculation of Fe^(3+) and Fe^(2+) of biotites indicates a low oxygen fugacity condition(log fO_2 ranging from 10-17 to 10-18 bars, below MH), which is favorable for the W-Sn mineralization. Tungsten and tin have been enriched in granitic magmas through fractionation, and low oxygen fugacity conditions have promoted the accumulation and transportation of W-Sn in the hydrothermal fluids, leading to deposition of mineral phases. The geochemical data suggest that Piaoac granites formed in an extensional setting related with the Late Cretaceous magmatism occurring large-scale lithospheric extensional in South China Block.
基金supported by a research project(No.Z111021402)of Northwest A&F Universitythe Ministry of Natural Resources and Environment,Vietnam government,Hanoiand IDEA WILD equipment to Vu Dinh Duy,Bui Thi Tuyet Xuan
文摘Taxus chinensis and T. wallichiana in have been threatened in their distribution areas in recent decades because of their over-exploitation and reduction and destruction of native habitats. Determining the genetic diversity in populations of the two species will provide guidelines for their protection and preservation. Two hundred and fifteen trees from six populations of T. chinensis and150 sampled trees of T. wallichiana were sampled. Six microsatellite primer pairs selected from 16 primer pairs were used to investigate genetic variation at the population and species levels. Five yielded polymorphic alleles, and among the 13 putative alleles amplified, 11 were polymorphic（accounting for 76.33 %）.Shannon＇s information index（I） and percentage of polymorphic bands（PPB）（I = 0.202 and PPB = 67.22 % for T. chinensis; I = 0.217 and PPB = 65.03 % for T. wallichiana）. Both species had low levels of genetic diversity（mean Ho= 0.107, He= 0.121 for T. chinensis; Ho= 0.095, He= 0.109 for T. wallichiana）. Genetic differentiation among populations was higher（FST= 0.189） for T. chinensis and lower（0.156） for T.wallichiana, indicating limited gene flow（Nm） among populations for T. chinensis（0.68） and T. wallichiana（0.65）.Variation among individuals of T. chinensis was 63.59 and73.12 % for T. wallichiana. Thus, the threatened status of the two conifers is related to a lack of genetic diversity. All populations are isolated in small forest remnants. An ex situ conservation site should be established with a new population for these species that comprises all the genetic groups for the best chance to improve their fitness under environmental stresses.
基金supported by the Chiang Mai University,Thailandthe National Foundation for Science and Technology Development,Vietnam(No,101.01-2014.35)
文摘In this paper, we will present new results on robust finite-time H∞ control for linear time-varying systems with both time-varying delay and bounded control. Delay-dependent sufficient conditions for robust finite-time stabilization and H∞ control are first established to guarantee finite-time stability of the closed-loop system via solving Riccati differential equations. Applications to finite-time H∞ control to a class of linear autonomous time-delay systems with bounded control are also discussed in this paper.Numerical examples are given to illustrate the effectiveness of the proposed method.
文摘Ben Tre<span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> located in the Mekong Delta, is one of the most places affected by climate change, especially in sea level rise and salinity intrusion. For the seven provinces bordering the East Sea, the need for monitoring water resources is critical. This paper represents an approach to build a web-based GIS to store, manage, analyze and visualize the data of saline intrusion phenomenon. The novelty focuses on automating the workflow for the generation and publication of time series saline intrusion maps on server side. The analysis results are provided on the web browser interface. This helps users access valuable information without having to install professional GIS software. Spatial distribution of saline intrusion and statistical results support government agencies in planning and decision making. This work is funded by Ben Tre Provincial People'</span><span style="font-family:Verdana;">s Committee and Vietnam Academy of Science and Technology (VAST).</span>
基金supported by the National Nature Science Foundation of China(31972869)。
文摘Three new genera of spiders are described:Jishiyu Lin&Li,gen.nov.,of Agelenidae C.L.Koch,1837,with J.songjiang Lin&Li,sp.nov.(♂,China:Yunnan)as the type species,Marusik Lin&Li,gen.nov.,of Gnaphosidae Banks,1892,with M.yurii Lin&Li,sp.nov.(♂,Vietnam)as the type species and Xiaoliguang Lin&Li,gen.nov.,of Phrurolithidae Banks,1892,with X.huarong Lin&Li,sp.nov.(♂♀,Vietnam)as the type species.Thirty-five new species are described in 12 families:Corinnidae Karsch,1880:Spinirta qishuoi Lin&Li,sp.nov.(♀,China:Guangxi);Hahniidae Bertkau,1878:Cicurina miniae Lin&Li,sp.nov.(♀,Vietnam);Halonoproctidae Pocock,1901:Latouchia wenruni Lin&Li,sp.nov.(♂♀,China:Hainan);Liocranidae Simon,1897:Oedignatha wuyong Lin&Li,sp.nov.(♂♀,Vietnam)and Sphingius gongsunsheng Lin&Li,sp.nov.(♀,Vietnam);Nemesiidae Simon,1889:Sinopesa guansheng Lin&Li,sp.nov.(♂,China:Yunnan);Phrurolithidae Banks,1892:Edelithus huyanzhuo Lin&Li,sp.nov.(♂♀,Vietnam),E.linchong Lin&Li,sp.nov.(♂♀,Vietnam),E.qinming Lin&Li,sp.nov.(♂♀,Vietnam),Grandilithus linglingae Lin&Li,sp.nov.(♂♀,Vietnam),G.yangzhi Lin&Li,sp.nov.(♀,Vietnam),Lingulatus chaijin Lin&Li,sp.nov.(♀,Vietnam),L.dongping Lin&Li,sp.nov.(♂♀,Vietnam),L.liying Lin&Li,sp.nov.(♂♀,Vietnam),L.longfeiae Lin&Li,sp.nov.(♂♀,Vietnam),L.luzhishen Lin&Li,sp.nov.(♂♀,Vietnam),L.zhangqing Lin&Li,sp.nov.(♂♀,Vietnam),L.zhutong Lin&Li,sp.nov.(♂♀,Vietnam),Otacilia liuxinyei Lin&Li,sp.nov.(♂♀,Vietnam),O.wusong Lin&Li,sp.nov.(♂,Vietnam)and O.xuning Lin&Li,sp.nov.(♀,Vietnam);Pimoidae Wunderlich,1986:Pimoa zeluni Lin&Li,sp.nov.(♂,China:Hebei);Salticidae Blackwall,1841:Epeus covid Lin&Li,sp.nov.(♂♀,China:Yunnan);Theridiidae Sundevall,1833:Phoroncidia minlangi Lin&Li,sp.nov.(♀,China:Fujian);Thomisidae Sundevall,1833:Borboropactus nanda Lin&Li,sp.nov.(♂♀,China:Yunnan),Cozyptila haocongi Lin&Li,sp.nov.(♂♀,Vietnam),Lysiteles huyilinae Lin&Li,sp.nov.(♂♀,Vietnam),Massuria daizong Lin&Li,sp.nov.(♂♀,China:Yunnan)and Zametopina wanliae Lin&Li,sp.nov.(♂,Vietnam);Trachelidae Simon,1897:Utivarachna yumaoi Lin&Li,sp.nov.(♂,Vietnam);Zodariidae Thorell,1881:Asceua shuangreni Lin&Li,sp.nov.(♂♀,Vietnam),Cydrela likui Lin&Li,sp.nov.(♂♀,Vietnam),Mallinella lisongi Lin&Li,sp.nov.(♂♀,Vietnam),M.pingzhoui Lin&Li,sp.nov.(♂♀,Vietnam)and M.sena Lin&Li,sp.nov.(♂♀,Vietnam).One genus name and one species name are detected as homonyms and thereby replacement names for the preoccupied names are proposed,in accordance with Article 60 of the International Code of Zoological Nomenclature(ICZN,1999),i.e.,Xilithus Liu&Li,nom.nov.,ex Acrolithus Liu&Li,2022(preoccupied nomen);Araneus xiang Mi&Li,nom.nov.,ex Araneus arcuatus Mi&Li,2022(preoccupied nomen).Therefore,all 16 species of Acrolithus Liu&Li,2022 are transferred to Xilithus Liu&Li,nom.nov.
