为提升国家级农业气象业务应用能力,在中国农业气象业务系统(China Agricultural Meteorological Service System,CAgMSS)2.0的基础上,基于气象大数据云平台(天擎)开发中国农业气象业务系统3.0。CAgMSS3.0以B/S架构,采用代理微服务设计...为提升国家级农业气象业务应用能力,在中国农业气象业务系统(China Agricultural Meteorological Service System,CAgMSS)2.0的基础上,基于气象大数据云平台(天擎)开发中国农业气象业务系统3.0。CAgMSS3.0以B/S架构,采用代理微服务设计模式、Kudu分布式数据管理和地理信息系统(Geographic Information System,GIS)引擎技术,按照数据、算法、产品、用户4步业务流程,将系统架构分为数据层、基础层、应用层和用户层,基本实现数据和算法云化。较CAgMSS2.0,新增作物气象适宜指数、农业气候年景评估和预测、光学与微波遥感全天候苗情监测分析、农业气象灾害指数库、农业气象灾害格点监测预报等模块,改进基于机器学习和多源数据融合的土壤墒情监测评估、农业病虫害发生发展气象等级预报、国省互动的农用天气预报和农业气候种植与农业气象灾害风险区划等技术。CAgMSS3.0应用以来显著提升了国家级农业气象服务水平。未来将在天气业务一体化平台框架下集成农业气象服务系统,发展基于“AI+机理模型”的作物生长模拟大模型和农业气象智能服务大模型。展开更多
To accurately measure and evaluate reserves is critical for ensuring successful production of unconventional oil and gas. This work proposes a volumetric model to evaluate the tight sandstone gas reserves of the Permi...To accurately measure and evaluate reserves is critical for ensuring successful production of unconventional oil and gas. This work proposes a volumetric model to evaluate the tight sandstone gas reserves of the Permian Sulige gas field in the Ordos Basin. The reserves can be determined by four major parameters of reservoir cutoffs, net pay, gas-bearing area and compression factor Z, which are controlled by reservoir characteristics and sedimentation. Well logging, seismic analysis, core analysis and gas testing, as well as thin section identification and SEM analysis were used to analyze the pore evolution and pore-throat structure. The porosity and permeability cutoffs are determined by distribution function curve,empirical statistics and intersection plot. Net pay and gas-bearing area are determined based on the cutoffs, gas testing and sand body distribution, and the compression factor Z is obtained by gas component. The results demonstrate that the reservoir in the Sulige gas field is characterized by ultralow porosity and permeability, and the cutoffs of porosity and permeability are 5% and 0.15×10^(–3) μm^2, respectively. The net pay and gas-bearing area are mainly affected by the sedimentary facies, sand body types and distribution. The gas component is dominated by methane which accounts for more than 90%, and the compression factor Z of H_8(P_2h_8) and S_1(P_1s_1) are 0.98 and 0.985, respectively. The distributary channels stacked and overlapped, forming a wide and thick sand body with good developed intergranular pores and intercrystalline pores. The upper part of channel sand with good porosity and permeability can be sweet spot for gas exploration. The complete set of calculation systems proposed for tight gas reserve calculation has proved to be effective based on application and feedback. This model provides a new concept and consideration for reserve prediction and calculation in other areas.展开更多
Given sustaining exploration, the eastern zone of the Sulige gas field may soon become a key area of exploitation. In order to explore its genesis, types and distribution of the reservoir sandstones in the eastern zon...Given sustaining exploration, the eastern zone of the Sulige gas field may soon become a key area of exploitation. In order to explore its genesis, types and distribution of the reservoir sandstones in the eastern zone of this gas field, we focused in our study on the provenance and detailed sedimentary facies of sandstone of the He8 （the eighth part of the Shihezi formation, Permian system） and Shanxil （the first part of the Shanxi formation, Permian system） members, based on core observations, analyses in petrography, granularity and logging. The results show that： 1） the sandstone provenance of Shanxil and He8 in the eastern zone of the Sulige gas field is from the north of the Ordos Basin, characterized by dual directions from the north and northeast. 2） The He8 and Shanxil members were deposited in a fluvial-delta sedimentary system. The He8 was mainly deposited in braided rivers, in- cluding braided channels, channel bars, levee and floodplain sub-environments, whereas the Shanxil Member was deposited in braided rivers and deltas, including braided channels, channel bars, floodplains, tributaries and inter-tributary sub-environments. 3） Sedimentary facies bands migrated in drastic fashion towards the basin from the Shanxil to the He8 Member. Base levels of sedi- mentation generally present a trend of small increases in-amplitude, large decreasing amplitudes and slow and gradual Increases. 4） The continuity of the reservoir sandbodies along the source direction is better than that perpendicular to the direction. Compared with Shanxil, both dimensions and continuity of the sandbodies in He8 are better from which we conclude that it is the most fa- vorable part of the reservoir.展开更多
This study creates a three-dimensional surface spline(3DSS)model of China's Mainland based on surface and CHAMP satellite observations.Through this model,the magnetic field analyses of domestic plateau(Qinghai-Tib...This study creates a three-dimensional surface spline(3DSS)model of China's Mainland based on surface and CHAMP satellite observations.Through this model,the magnetic field analyses of domestic plateau(Qinghai-Tibet Plateau 28°N-38°N,78°E-102°E),plain(middle and lower reaches of Yangtze River Plain 27°N-34°N,111°E-122°E),and marine(parts of the East and South China Seas 16°N-30°N,123°E-136°E)areas have been investigated.Single models of plateau and plain have also been created.To compare and verify results,the corresponding two-dimensional(2DTY)and three-dimensional(3DTY)Taylor polynomial models have been derived.Issues such as the removal of disturbing geomagnetic fields,the data gap between surface and satellite level,and boundary effect are all seriously considered.With an aim to evaluate the resulting model,some randomly selected points are not join the modeling,by which we thereby inspected the results in terms of residuals,change rate absolutes,and Root Mean Square Error(RMSE).Results show that except component Y,the change rate absolutes of other components are less than 1%both in domestic and single models,which means that the modeling result of 3DSS is better than the other two models.Plateau and plain 3DSS models reflect the fine distribution of the magnetic field after comparison with domestic distribution.The 3DSS model fits the plateau best,followed by the plain,while the worst fit is in the marine area.This means that the modeling precision depends mainly on the number and distribution of measuring points.展开更多
目的探讨乙型肝炎病毒(hepatitis B virus,HBV)前S/S区氨基酸位点的变异与肝硬化发生发展的潜在关联,为进一步理解HBV变异在疾病进展中的作用及开发针对性治疗策略提供科学依据。方法2018—2022年于甘肃省武威肿瘤医院纳入慢性乙型肝炎(...目的探讨乙型肝炎病毒(hepatitis B virus,HBV)前S/S区氨基酸位点的变异与肝硬化发生发展的潜在关联,为进一步理解HBV变异在疾病进展中的作用及开发针对性治疗策略提供科学依据。方法2018—2022年于甘肃省武威肿瘤医院纳入慢性乙型肝炎(chronic hepatitis B,CHB)感染者建立专病队列,共纳入乙型肝炎表面抗原(hepati-tis B surface antigen,HBsAg)阳性患者3882人。随访至2022年12月31日,对患者血清样本的HBV前S/S区进行二代测序(next-generation sequencing,NGS),将序列进行翻译与基因分型后得到C基因型,并将肝硬化与非肝硬化患者按年龄(±5岁)与性别进行1∶1匹配后,计算氨基酸突变率与香农熵。构建稀疏逻辑回归(sparse logistic regression,SLR)模型,分析乙型肝炎相关肝硬化患者病毒前S/S区氨基酸的特征。结果测序完整的C基因型患者196人,其中肝硬化22人,非肝硬化174人。年龄(±5岁)与性别的1∶1匹配分析后,得到肝硬化组和非肝硬化组各20人。非肝硬化组中接受抗病毒治疗的患者比例高于肝硬化组,差异有统计学意义(χ^(2)=4.912,P<0.05)。肝硬化组前S1区的平均突变频率及香农熵均高于非肝硬化组,差异有统计学意义(Z=3.793、3.057,P<0.05)。共发现8个氨基酸位点的突变频率在2组间差异有统计学意义,有6个是有效突变位点。其中,T68、G73、M120和G318位点突变频率肝硬化组高于非肝硬化组(Z=2.029、2.191、2.299、2.029,P<0.05),而T84、L267、L283和N380位点则相反(Z=2.380、2.056、2.353、2.462,P<0.05)。建立的SLR模型筛选出第380个位点(即N380位点)的突变频率为最高贡献度指标(Z=2.462,P<0.05),其余指标的贡献度虽排在前10,但2组间差异无统计学意义。结论HBV前S/S区氨基酸位点的改变可能影响肝硬化的发展,即前S1区氨基酸突变频率越高肝硬化就越有可能发生;SLR模型的应用为肝硬化预测及精准治疗提供了新的方向。展开更多
文摘为提升国家级农业气象业务应用能力,在中国农业气象业务系统(China Agricultural Meteorological Service System,CAgMSS)2.0的基础上,基于气象大数据云平台(天擎)开发中国农业气象业务系统3.0。CAgMSS3.0以B/S架构,采用代理微服务设计模式、Kudu分布式数据管理和地理信息系统(Geographic Information System,GIS)引擎技术,按照数据、算法、产品、用户4步业务流程,将系统架构分为数据层、基础层、应用层和用户层,基本实现数据和算法云化。较CAgMSS2.0,新增作物气象适宜指数、农业气候年景评估和预测、光学与微波遥感全天候苗情监测分析、农业气象灾害指数库、农业气象灾害格点监测预报等模块,改进基于机器学习和多源数据融合的土壤墒情监测评估、农业病虫害发生发展气象等级预报、国省互动的农用天气预报和农业气候种植与农业气象灾害风险区划等技术。CAgMSS3.0应用以来显著提升了国家级农业气象服务水平。未来将在天气业务一体化平台框架下集成农业气象服务系统,发展基于“AI+机理模型”的作物生长模拟大模型和农业气象智能服务大模型。
基金funded by the Geological Survey Project of the China Geological Survey (grants No. DD20189614, DD20160173)the National Science Foundation of China (grants No. 41702204, 41402120)
文摘To accurately measure and evaluate reserves is critical for ensuring successful production of unconventional oil and gas. This work proposes a volumetric model to evaluate the tight sandstone gas reserves of the Permian Sulige gas field in the Ordos Basin. The reserves can be determined by four major parameters of reservoir cutoffs, net pay, gas-bearing area and compression factor Z, which are controlled by reservoir characteristics and sedimentation. Well logging, seismic analysis, core analysis and gas testing, as well as thin section identification and SEM analysis were used to analyze the pore evolution and pore-throat structure. The porosity and permeability cutoffs are determined by distribution function curve,empirical statistics and intersection plot. Net pay and gas-bearing area are determined based on the cutoffs, gas testing and sand body distribution, and the compression factor Z is obtained by gas component. The results demonstrate that the reservoir in the Sulige gas field is characterized by ultralow porosity and permeability, and the cutoffs of porosity and permeability are 5% and 0.15×10^(–3) μm^2, respectively. The net pay and gas-bearing area are mainly affected by the sedimentary facies, sand body types and distribution. The gas component is dominated by methane which accounts for more than 90%, and the compression factor Z of H_8(P_2h_8) and S_1(P_1s_1) are 0.98 and 0.985, respectively. The distributary channels stacked and overlapped, forming a wide and thick sand body with good developed intergranular pores and intercrystalline pores. The upper part of channel sand with good porosity and permeability can be sweet spot for gas exploration. The complete set of calculation systems proposed for tight gas reserve calculation has proved to be effective based on application and feedback. This model provides a new concept and consideration for reserve prediction and calculation in other areas.
基金supported by the National Basic Re-search Program of China (No2003CB214603)
文摘Given sustaining exploration, the eastern zone of the Sulige gas field may soon become a key area of exploitation. In order to explore its genesis, types and distribution of the reservoir sandstones in the eastern zone of this gas field, we focused in our study on the provenance and detailed sedimentary facies of sandstone of the He8 （the eighth part of the Shihezi formation, Permian system） and Shanxil （the first part of the Shanxi formation, Permian system） members, based on core observations, analyses in petrography, granularity and logging. The results show that： 1） the sandstone provenance of Shanxil and He8 in the eastern zone of the Sulige gas field is from the north of the Ordos Basin, characterized by dual directions from the north and northeast. 2） The He8 and Shanxil members were deposited in a fluvial-delta sedimentary system. The He8 was mainly deposited in braided rivers, in- cluding braided channels, channel bars, levee and floodplain sub-environments, whereas the Shanxil Member was deposited in braided rivers and deltas, including braided channels, channel bars, floodplains, tributaries and inter-tributary sub-environments. 3） Sedimentary facies bands migrated in drastic fashion towards the basin from the Shanxil to the He8 Member. Base levels of sedi- mentation generally present a trend of small increases in-amplitude, large decreasing amplitudes and slow and gradual Increases. 4） The continuity of the reservoir sandbodies along the source direction is better than that perpendicular to the direction. Compared with Shanxil, both dimensions and continuity of the sandbodies in He8 are better from which we conclude that it is the most fa- vorable part of the reservoir.
基金supported by the National Natural Science Foundation of China(Nos.42030203,41974073,and 41404053)。
文摘This study creates a three-dimensional surface spline(3DSS)model of China's Mainland based on surface and CHAMP satellite observations.Through this model,the magnetic field analyses of domestic plateau(Qinghai-Tibet Plateau 28°N-38°N,78°E-102°E),plain(middle and lower reaches of Yangtze River Plain 27°N-34°N,111°E-122°E),and marine(parts of the East and South China Seas 16°N-30°N,123°E-136°E)areas have been investigated.Single models of plateau and plain have also been created.To compare and verify results,the corresponding two-dimensional(2DTY)and three-dimensional(3DTY)Taylor polynomial models have been derived.Issues such as the removal of disturbing geomagnetic fields,the data gap between surface and satellite level,and boundary effect are all seriously considered.With an aim to evaluate the resulting model,some randomly selected points are not join the modeling,by which we thereby inspected the results in terms of residuals,change rate absolutes,and Root Mean Square Error(RMSE).Results show that except component Y,the change rate absolutes of other components are less than 1%both in domestic and single models,which means that the modeling result of 3DSS is better than the other two models.Plateau and plain 3DSS models reflect the fine distribution of the magnetic field after comparison with domestic distribution.The 3DSS model fits the plateau best,followed by the plain,while the worst fit is in the marine area.This means that the modeling precision depends mainly on the number and distribution of measuring points.
