Well-preserved and diversified spores,cryptospores,and acritarchs have been recorded from a relatively continuous sequence that encompasses the Silurian-Devonian boundary in Qujing, Yunnan,southwest China.Four spore a...Well-preserved and diversified spores,cryptospores,and acritarchs have been recorded from a relatively continuous sequence that encompasses the Silurian-Devonian boundary in Qujing, Yunnan,southwest China.Four spore assemblage zones from Late Silurian to Early Devonian in age are proposed based on the first appearance datum（FAD）of characteristic spore species.In ascending stratigraphic order,they are Ambitisporites dilutus-Apiculiretusispora synorea（DS;Late Ludfordian to Early Pridoli）,Synorisporites verrucatus-Apiculiretusispora plicata（VP;Pridoli）,Apiculiretusispora minuta-Leiotriletes ornatus（MO;Lochkovian）,and Verrucosisporites polygonalis-Dibolisporites wetteldorfensis（PW;Pragian）.The acritarch assemblage from the upper part of the Yulongsi Formation,the Xiaxishancun Formation,and the lower-middle parts of the Xitun Formation indicates an age of Late Silurian.Based on palynological evidence,the upper part of the Yulongsi Formation is considered Late Ludfordian to Early Pridoli in age;the Xiaxishancun Formation is believed to be Pridoli in age;the Xitun Formation is considered Late Pridoli to Early Lochkovian in age;the Guijiatun Formation is considered Lochkovian in age;and the Xujiachong Formation is Late Lochkovian to Pragian in age.The Silurian-Devonian boundary is recognized between the VP and the MO spore biozones,and occurs within the middle part of the Xitun Formation.展开更多
New findings of galeaspids(Agnatha)including Altigibbaspis huiqingae gen.et sp.nov.,an indeterminate polybranchiaspid,Eugaleaspis changi,and Nanpanaspis microculus are described from the lower part of the Xishancun Fo...New findings of galeaspids(Agnatha)including Altigibbaspis huiqingae gen.et sp.nov.,an indeterminate polybranchiaspid,Eugaleaspis changi,and Nanpanaspis microculus are described from the lower part of the Xishancun Formation(early Lochkovian,Early Devonian)near the northeast entrance of Liaokuo Park,Qujing City,Yunnan Province,China.The Polybranchiaspis-like new genus is characterized by a blade-like median dorsal ridge on the dorsal side of head-shield.The morphological disparity of the median dorsal ridge and spine in galeaspids suggests that these structures functioned more than providing a hydrodynamic stability.We assume that a high upright and compressed spine may render galeaspid fishes an apparently larger size as seen by a predator,and a blade-like median dorsal ridge may accomplish a defense against the claws of large sea scorpions.Nanpanaspis is peculiar in bearing two short laterally projecting processes on each side of the head-shield,and its phylogenetic relationship is discussed based on different interpretations on the homology of these processes.Considering the unique morphology of Nanpanaspis,and its early occurrence among the Huananaspiformes,we assign Nanpanaspis in the monogeneric family Nanpanaspidae to represent an early branch of the Huananaspiformes.展开更多
The risk regionalization of drought for flue-cured tobacco planting in Qujing City was studied to provide reference for drawing on advantages and avoiding disadvantages in flue-cured tobacco planting,disaster reductio...The risk regionalization of drought for flue-cured tobacco planting in Qujing City was studied to provide reference for drawing on advantages and avoiding disadvantages in flue-cured tobacco planting,disaster reduction,and disaster relief services.According to the production practice of flue-cured tobacco and local climate analysis,the risk of disaster-causing factors,sensitivity of disaster-breeding environment,vulnerability of carriers,and disaster prevention and reduction capability were analyzed and evaluated quantitatively.Secondly,starting from the formation mechanism of drought,a risk assessment model of the meteorological disaster was established by GIS technology.Finally,the risk assessment and regionalization of drought in the critical periods for drought-stricken flue-cured tobacco (transplanting period,root extending stage and vigorous growth period) in Qujing City were carried out.The results showed that in Qujing City,the risk areas of drought for flue-cured tobacco planting were divided into five grades in the transplanting period and six grades in the root extending stage and vigorous growth period.展开更多
In order to set up the digitization indices system of appearance quality of flue-cured tobacco leaves in Qujing. According to the relevant standards,the quantitative analysis on appearance quality of 39 cutter and upp...In order to set up the digitization indices system of appearance quality of flue-cured tobacco leaves in Qujing. According to the relevant standards,the quantitative analysis on appearance quality of 39 cutter and upper tobacco leaf samples which were collected from eight fluecured tobacco production regions of Qujing City,Yunnan Province were carried out in 2011,respectively. The results showed that the difference in evaluation score of appearance quality of flue-cured tobacco in eight regions was not significant. The tobacco leaves had high maturity,high oil content,loose structure and good appearance quality. The scores of appearance quality of flue-cured tobacco in Shizong County and Malong County are higher than other regions. The two regions are suitable for tobacco plantation. The preliminary digitization indices provide reference and guidance to tobacco production and standards system of tobacco leaves base.展开更多
There is a prominent,complex and diverse three-dimensional climate and a variety of meteorological disasters in Qujing area. The risk zoning of low-temperature disasters for flue-cured tobacco planting in Qujing area ...There is a prominent,complex and diverse three-dimensional climate and a variety of meteorological disasters in Qujing area. The risk zoning of low-temperature disasters for flue-cured tobacco planting in Qujing area was studied to provide reference for drawing on advantages and avoiding disadvantages in flue-cured tobacco planting,disaster reduction,and disaster relief services. According to the production practice of fluecured tobacco and local climate analysis,it was determined that flue-cured tobacco in Qujing area was very vulnerable to low temperature during the seedling stage（ from early February to middle April） and in the mature period（ from early July to early September）. Based on the quantitative analysis and evaluation of risk of disaster-causing factors,sensitivity of disaster-breeding environment,vulnerability of carriers,and disaster prevention and reduction capability,a risk assessment model of meteorological disasters was established to precisely evaluate and zone the risk of low-temperature disasters for flue-cured tobacco planting in allusion to the seedling and mature stage in Qujing area by using GIS technology. The risk of lowtemperature disasters for flue-cured tobacco planting during the two periods was divided into four grades,namely low,medium,high and very high risk.展开更多
Based on the data of hail disaster in Qujing City and the detection data of the new generation of Doppler weather radar, the spatial and temporal distribution characteristics of hail disaster and hail suppression oper...Based on the data of hail disaster in Qujing City and the detection data of the new generation of Doppler weather radar, the spatial and temporal distribution characteristics of hail disaster and hail suppression operations in Qujing City were analyzed statistically, and the hail suppression operations of a typical cell case was analyzed. The results showed that the number of hail days and hail frequency showed an increasing trend in Qujing City from 2017 to 2022, and the number of artificial hail suppression operations increased accordingly. Hail disaster occurred most frequently in Xuanwei City. Through the analysis of hail suppression operations of a typical cell case, it is found that the operations were timely, and the location was reasonable. The ammunition used was sufficient, and the overall effect of the hail suppression operations was good.展开更多
Tourism development in emerging destinations requires balancing economic benefits with ecological sustainability.In this study,we investigate the case of multi-attraction tourism planning in Qujing City,where the dual...Tourism development in emerging destinations requires balancing economic benefits with ecological sustainability.In this study,we investigate the case of multi-attraction tourism planning in Qujing City,where the dual challenge lies in maximizing economic-experiential value while minimizing congestion-eco-logical stress.We formulate this problem as a bi-objective optimization model,integrating attraction revenues,visitor preferences,route costs,and site capacities into a unified framework.To solve the model,we employ NSGA-II en-hanced with customized crossover and mutation operators specifically designed for route structures and visitor allocations.These operators enable efficient exploration of feasible solutions while maintaining capacity and time-window constraints.Extensive experiments across different scales of scenic scenarios demonstrate that our method consistently outperforms greedy and randomized baselines in terms of hypervolume and sustainability indicators.The results highlight the effectiveness of incorporating problem-specific operators into evo-lutionary algorithms and provide practical insights for sustainable tourism man-agement in Qujing and other similar destinations.展开更多
Background and Objectives:This study investigated the iodine status of pregnant women at an average altitude of approximately 2000 meters in Qujing,China.The relationship between iodine and thyroid function in differe...Background and Objectives:This study investigated the iodine status of pregnant women at an average altitude of approximately 2000 meters in Qujing,China.The relationship between iodine and thyroid function in different trimesters as well as adverse pregnancy and fetal outcomes were also investigated.Methods and Study Design:A total of 1,025 pregnant women who were admitted to Qujing Affiliated Hospital of Kunming Medical Univer sity from January 2019 to August 2021 were included.Urinary iodine concentration(UIC)was detected by color imetric method,and serum thyroid function was detected by chemiluminescence.Among them,537 pregnant women were followed up to analyze the association of iodine with adverse pregnancy and fetal outcomes.Re sults:The median UIC was 127μg/L.Serum triiodothyronine,thyroxine,free triiodothyronine,and free thyrox ine were negatively associated with urinary iodine concentration in the first and second trimesters of pregnancy.The proportion of pregnant women testing positive for thyroid peroxidase antibody(TPO-Ab)and the prevalence of thyroid autoimmunity(TAI)increased significantly in more-than-adequate iodine and excess iodine groups.Logistic regression analysis showed maternal iodine was not associated with adverse pregnancy and fetal out comes.Conclusions:Mild iodine deficiency is common among pregnant women in plateau areas of China.The relationship between iodine and thyroid function is significant in the first and second trimesters of pregnancy,es pecially in those with moderate to severe iodine deficiency.Abnormal iodine level in pregnant women was not significantly associated with adverse pregnancy and fetal outcomes in areas with predominantly mild iodine defi ciency.展开更多
基金supported by the Chinese Academy of Sciences(noKZCX2-YW-105, KZCX2-SW-130)the National Natural Science Foundation of China(no40523004 and 40072005)
文摘Well-preserved and diversified spores,cryptospores,and acritarchs have been recorded from a relatively continuous sequence that encompasses the Silurian-Devonian boundary in Qujing, Yunnan,southwest China.Four spore assemblage zones from Late Silurian to Early Devonian in age are proposed based on the first appearance datum（FAD）of characteristic spore species.In ascending stratigraphic order,they are Ambitisporites dilutus-Apiculiretusispora synorea（DS;Late Ludfordian to Early Pridoli）,Synorisporites verrucatus-Apiculiretusispora plicata（VP;Pridoli）,Apiculiretusispora minuta-Leiotriletes ornatus（MO;Lochkovian）,and Verrucosisporites polygonalis-Dibolisporites wetteldorfensis（PW;Pragian）.The acritarch assemblage from the upper part of the Yulongsi Formation,the Xiaxishancun Formation,and the lower-middle parts of the Xitun Formation indicates an age of Late Silurian.Based on palynological evidence,the upper part of the Yulongsi Formation is considered Late Ludfordian to Early Pridoli in age;the Xiaxishancun Formation is believed to be Pridoli in age;the Xitun Formation is considered Late Pridoli to Early Lochkovian in age;the Guijiatun Formation is considered Lochkovian in age;and the Xujiachong Formation is Late Lochkovian to Pragian in age.The Silurian-Devonian boundary is recognized between the VP and the MO spore biozones,and occurs within the middle part of the Xitun Formation.
文摘New findings of galeaspids(Agnatha)including Altigibbaspis huiqingae gen.et sp.nov.,an indeterminate polybranchiaspid,Eugaleaspis changi,and Nanpanaspis microculus are described from the lower part of the Xishancun Formation(early Lochkovian,Early Devonian)near the northeast entrance of Liaokuo Park,Qujing City,Yunnan Province,China.The Polybranchiaspis-like new genus is characterized by a blade-like median dorsal ridge on the dorsal side of head-shield.The morphological disparity of the median dorsal ridge and spine in galeaspids suggests that these structures functioned more than providing a hydrodynamic stability.We assume that a high upright and compressed spine may render galeaspid fishes an apparently larger size as seen by a predator,and a blade-like median dorsal ridge may accomplish a defense against the claws of large sea scorpions.Nanpanaspis is peculiar in bearing two short laterally projecting processes on each side of the head-shield,and its phylogenetic relationship is discussed based on different interpretations on the homology of these processes.Considering the unique morphology of Nanpanaspis,and its early occurrence among the Huananaspiformes,we assign Nanpanaspis in the monogeneric family Nanpanaspidae to represent an early branch of the Huananaspiformes.
基金Supported by China National Tobacco Corporation(Yunnan Tobacco Science and Technology Program No.[2014]302,program contract number:2014YN22)
文摘The risk regionalization of drought for flue-cured tobacco planting in Qujing City was studied to provide reference for drawing on advantages and avoiding disadvantages in flue-cured tobacco planting,disaster reduction,and disaster relief services.According to the production practice of flue-cured tobacco and local climate analysis,the risk of disaster-causing factors,sensitivity of disaster-breeding environment,vulnerability of carriers,and disaster prevention and reduction capability were analyzed and evaluated quantitatively.Secondly,starting from the formation mechanism of drought,a risk assessment model of the meteorological disaster was established by GIS technology.Finally,the risk assessment and regionalization of drought in the critical periods for drought-stricken flue-cured tobacco (transplanting period,root extending stage and vigorous growth period) in Qujing City were carried out.The results showed that in Qujing City,the risk areas of drought for flue-cured tobacco planting were divided into five grades in the transplanting period and six grades in the root extending stage and vigorous growth period.
基金Supported by The Science and Technology Project of Hongyun Honghe(Group)Co.,Ltd.(HYHH2012YL04)Talent Project of Yunnan Provincial Department of Science and Technology(2010CI030)
文摘In order to set up the digitization indices system of appearance quality of flue-cured tobacco leaves in Qujing. According to the relevant standards,the quantitative analysis on appearance quality of 39 cutter and upper tobacco leaf samples which were collected from eight fluecured tobacco production regions of Qujing City,Yunnan Province were carried out in 2011,respectively. The results showed that the difference in evaluation score of appearance quality of flue-cured tobacco in eight regions was not significant. The tobacco leaves had high maturity,high oil content,loose structure and good appearance quality. The scores of appearance quality of flue-cured tobacco in Shizong County and Malong County are higher than other regions. The two regions are suitable for tobacco plantation. The preliminary digitization indices provide reference and guidance to tobacco production and standards system of tobacco leaves base.
基金Supported by China National Tobacco Corporation(Yunnan Tobacco Science and Technology Program No.[2014]302,program contract number:2014YN22)
文摘There is a prominent,complex and diverse three-dimensional climate and a variety of meteorological disasters in Qujing area. The risk zoning of low-temperature disasters for flue-cured tobacco planting in Qujing area was studied to provide reference for drawing on advantages and avoiding disadvantages in flue-cured tobacco planting,disaster reduction,and disaster relief services. According to the production practice of fluecured tobacco and local climate analysis,it was determined that flue-cured tobacco in Qujing area was very vulnerable to low temperature during the seedling stage（ from early February to middle April） and in the mature period（ from early July to early September）. Based on the quantitative analysis and evaluation of risk of disaster-causing factors,sensitivity of disaster-breeding environment,vulnerability of carriers,and disaster prevention and reduction capability,a risk assessment model of meteorological disasters was established to precisely evaluate and zone the risk of low-temperature disasters for flue-cured tobacco planting in allusion to the seedling and mature stage in Qujing area by using GIS technology. The risk of lowtemperature disasters for flue-cured tobacco planting during the two periods was divided into four grades,namely low,medium,high and very high risk.
文摘Based on the data of hail disaster in Qujing City and the detection data of the new generation of Doppler weather radar, the spatial and temporal distribution characteristics of hail disaster and hail suppression operations in Qujing City were analyzed statistically, and the hail suppression operations of a typical cell case was analyzed. The results showed that the number of hail days and hail frequency showed an increasing trend in Qujing City from 2017 to 2022, and the number of artificial hail suppression operations increased accordingly. Hail disaster occurred most frequently in Xuanwei City. Through the analysis of hail suppression operations of a typical cell case, it is found that the operations were timely, and the location was reasonable. The ammunition used was sufficient, and the overall effect of the hail suppression operations was good.
基金supported by Qujing Social Science Federation-Qujing Normal University Philosophy and Social Sciences Joint Special Project(ZSLH2023YB05).
文摘Tourism development in emerging destinations requires balancing economic benefits with ecological sustainability.In this study,we investigate the case of multi-attraction tourism planning in Qujing City,where the dual challenge lies in maximizing economic-experiential value while minimizing congestion-eco-logical stress.We formulate this problem as a bi-objective optimization model,integrating attraction revenues,visitor preferences,route costs,and site capacities into a unified framework.To solve the model,we employ NSGA-II en-hanced with customized crossover and mutation operators specifically designed for route structures and visitor allocations.These operators enable efficient exploration of feasible solutions while maintaining capacity and time-window constraints.Extensive experiments across different scales of scenic scenarios demonstrate that our method consistently outperforms greedy and randomized baselines in terms of hypervolume and sustainability indicators.The results highlight the effectiveness of incorporating problem-specific operators into evo-lutionary algorithms and provide practical insights for sustainable tourism man-agement in Qujing and other similar destinations.
基金supported by Yunnan Province Basic Re search Special Program-Kunming Medical University Joint Special Program-Superficial Program(202101AY070001-226)Yunnan Provincial Science and Technology Talents and Plat form Program(202305AD160002)Kunming Medical Uni versity"14th Five-Year Plan"Key Discipline Construction Pro jects.The funders supported the costs of this study.
文摘Background and Objectives:This study investigated the iodine status of pregnant women at an average altitude of approximately 2000 meters in Qujing,China.The relationship between iodine and thyroid function in different trimesters as well as adverse pregnancy and fetal outcomes were also investigated.Methods and Study Design:A total of 1,025 pregnant women who were admitted to Qujing Affiliated Hospital of Kunming Medical Univer sity from January 2019 to August 2021 were included.Urinary iodine concentration(UIC)was detected by color imetric method,and serum thyroid function was detected by chemiluminescence.Among them,537 pregnant women were followed up to analyze the association of iodine with adverse pregnancy and fetal outcomes.Re sults:The median UIC was 127μg/L.Serum triiodothyronine,thyroxine,free triiodothyronine,and free thyrox ine were negatively associated with urinary iodine concentration in the first and second trimesters of pregnancy.The proportion of pregnant women testing positive for thyroid peroxidase antibody(TPO-Ab)and the prevalence of thyroid autoimmunity(TAI)increased significantly in more-than-adequate iodine and excess iodine groups.Logistic regression analysis showed maternal iodine was not associated with adverse pregnancy and fetal out comes.Conclusions:Mild iodine deficiency is common among pregnant women in plateau areas of China.The relationship between iodine and thyroid function is significant in the first and second trimesters of pregnancy,es pecially in those with moderate to severe iodine deficiency.Abnormal iodine level in pregnant women was not significantly associated with adverse pregnancy and fetal outcomes in areas with predominantly mild iodine defi ciency.
