为解析大豆R6期籽粒氨基酸含量的遗传机制,本研究利用264份大豆种质资源材料在2020年和2021年测定了与菜用大豆食味品质相关的精氨酸、丙氨酸、谷氨酸和天冬氨酸含量,并进行全基因组关联分析(GWAS)。结果表明,2年共检测到89个与大豆R6...为解析大豆R6期籽粒氨基酸含量的遗传机制,本研究利用264份大豆种质资源材料在2020年和2021年测定了与菜用大豆食味品质相关的精氨酸、丙氨酸、谷氨酸和天冬氨酸含量,并进行全基因组关联分析(GWAS)。结果表明,2年共检测到89个与大豆R6期籽粒4种氨基酸含量显著关联的SNP位点,其中有5个标记能同时被2年或2个性状重复检测到,分别为S03_40647948(Chr.3)、S05_2727464(Chr.5)、S10_4122977(Chr.10)、S17_34559022(Chr.17)和S19_48541685(Chr.19),单个位点可以解释11.25%~28.19%的表型变异解,其中Chr.17上的标记S17_34559022在2020年和2021年被共同检测到与谷氨酸含量显著关联,属稳定遗传的位点。共挖掘出9个候选基因,其中ZIP蛋白(zinc finger family protein)、转录因子bHLH(bHLH DNA-binding superfamily protein)、生长素反应蛋白家族(auxin-responsive protein family)和天冬氨酸蛋白酶家族蛋白(aspartyl protease family protein),可能是影响菜用大豆氨基酸代谢的重要基因。本研究挖掘到的5个氨基酸含量主效SNP位点和9个候选基因,有助于解析大豆R6期籽粒氨基酸含量的遗传基础及其调控机制,为菜用大豆食味品质遗传改良奠定了基础。展开更多
Real-time kinematic GPS precise positioning has been playing an increasing role in both surveying and navigation. Based on the city’s fibre LAN network, Shenzhen Continuous Operating Reference Stations (SZCORS) syste...Real-time kinematic GPS precise positioning has been playing an increasing role in both surveying and navigation. Based on the city’s fibre LAN network, Shenzhen Continuous Operating Reference Stations (SZCORS) system has been established and consists of GPS reference stations, system control center, user’s data center, and real-time datacom network. The SZCORS system provides users the real-time centimeter positioning or post-processing millimeter positioning. This paper makes discussion on the structure of SZCORS system. Some experiments have been made to test the usablity, and then the data has been analyzed.展开更多
Thirty-nine deep subsurface soils(150—180 cm depth) near the outskirts of Beijing were investagated. The concentrations including n-alkanes from C_ 13 to C_ 36, pristane and phytane were in the range of 0.60 to 170...Thirty-nine deep subsurface soils(150—180 cm depth) near the outskirts of Beijing were investagated. The concentrations including n-alkanes from C_ 13 to C_ 36, pristane and phytane were in the range of 0.60 to 170.10 μg/g, with a median value of 4.26. Carbon preference index values for n-alkanes ranged from 1.08 to 2.98, with a median value of 1.48. The percentage contribution of “wax' n-alkanes was in the range of 6.03%—46.22%. A predominance of odd/even carbon n-alkanes and unresolved complex mixtures with different shapes and ranges were frequently observed. Factor analysis reduced the data set into three principal components and confirming contributions from low(19.58%), medium(20.49%) molecular weight species and long-chain n-alkanes(43.41%), respectively. Molecular biomarkers such as pristane, phytane, hopanes and steranes were detected. Based on the principal component analysis, the concentration profiles and molecular markers, it was found that the aliphatic hydrocarbons were from both biogenic and anthropogenic sources.展开更多
Knowledge representation is a key to the building of expert systems. The performance of knowledge representation methods directly affects the intelligence level and the problem-solving ability of the system. There are...Knowledge representation is a key to the building of expert systems. The performance of knowledge representation methods directly affects the intelligence level and the problem-solving ability of the system. There are various kinds of knowledge representation methods in ESEP3.0. In this paper, the authors introduce the knowledge representation methods, such as structure knowledge, seismological and precursory forecast knowledge, machine learning knowledge, synthetic prediction knowledge, knowledge to validate and verify certainty factors of anomalous evidence and support knowledge, etc. and propose a model for validation of certainty factors of anomalous evidence. The knowledge representation methods represent all kinds of earthquake prediction knowledge well.展开更多
In the process of national economic development, construction engineering plays an important role. In the actual construction process of engineering projects, there is a large mobility of personnel and places, and it ...In the process of national economic development, construction engineering plays an important role. In the actual construction process of engineering projects, there is a large mobility of personnel and places, and it involves a wide range. Therefore, it is difficult to carry out management work. With the improvement of the current level of science and technology, in the current stage of construction project management, the effective application of information technology can greatly improve the management level, help construction enterprises seize market share and improve their competitive strength. Based on this, this paper analyzes in detail the application measures of information technology in construction engineering management in the new era.展开更多
文摘为解析大豆R6期籽粒氨基酸含量的遗传机制,本研究利用264份大豆种质资源材料在2020年和2021年测定了与菜用大豆食味品质相关的精氨酸、丙氨酸、谷氨酸和天冬氨酸含量,并进行全基因组关联分析(GWAS)。结果表明,2年共检测到89个与大豆R6期籽粒4种氨基酸含量显著关联的SNP位点,其中有5个标记能同时被2年或2个性状重复检测到,分别为S03_40647948(Chr.3)、S05_2727464(Chr.5)、S10_4122977(Chr.10)、S17_34559022(Chr.17)和S19_48541685(Chr.19),单个位点可以解释11.25%~28.19%的表型变异解,其中Chr.17上的标记S17_34559022在2020年和2021年被共同检测到与谷氨酸含量显著关联,属稳定遗传的位点。共挖掘出9个候选基因,其中ZIP蛋白(zinc finger family protein)、转录因子bHLH(bHLH DNA-binding superfamily protein)、生长素反应蛋白家族(auxin-responsive protein family)和天冬氨酸蛋白酶家族蛋白(aspartyl protease family protein),可能是影响菜用大豆氨基酸代谢的重要基因。本研究挖掘到的5个氨基酸含量主效SNP位点和9个候选基因,有助于解析大豆R6期籽粒氨基酸含量的遗传基础及其调控机制,为菜用大豆食味品质遗传改良奠定了基础。
文摘Real-time kinematic GPS precise positioning has been playing an increasing role in both surveying and navigation. Based on the city’s fibre LAN network, Shenzhen Continuous Operating Reference Stations (SZCORS) system has been established and consists of GPS reference stations, system control center, user’s data center, and real-time datacom network. The SZCORS system provides users the real-time centimeter positioning or post-processing millimeter positioning. This paper makes discussion on the structure of SZCORS system. Some experiments have been made to test the usablity, and then the data has been analyzed.
基金The National Basic Research Program(973) of China(No. G1999045707)
文摘Thirty-nine deep subsurface soils(150—180 cm depth) near the outskirts of Beijing were investagated. The concentrations including n-alkanes from C_ 13 to C_ 36, pristane and phytane were in the range of 0.60 to 170.10 μg/g, with a median value of 4.26. Carbon preference index values for n-alkanes ranged from 1.08 to 2.98, with a median value of 1.48. The percentage contribution of “wax' n-alkanes was in the range of 6.03%—46.22%. A predominance of odd/even carbon n-alkanes and unresolved complex mixtures with different shapes and ranges were frequently observed. Factor analysis reduced the data set into three principal components and confirming contributions from low(19.58%), medium(20.49%) molecular weight species and long-chain n-alkanes(43.41%), respectively. Molecular biomarkers such as pristane, phytane, hopanes and steranes were detected. Based on the principal component analysis, the concentration profiles and molecular markers, it was found that the aliphatic hydrocarbons were from both biogenic and anthropogenic sources.
文摘Knowledge representation is a key to the building of expert systems. The performance of knowledge representation methods directly affects the intelligence level and the problem-solving ability of the system. There are various kinds of knowledge representation methods in ESEP3.0. In this paper, the authors introduce the knowledge representation methods, such as structure knowledge, seismological and precursory forecast knowledge, machine learning knowledge, synthetic prediction knowledge, knowledge to validate and verify certainty factors of anomalous evidence and support knowledge, etc. and propose a model for validation of certainty factors of anomalous evidence. The knowledge representation methods represent all kinds of earthquake prediction knowledge well.
文摘In the process of national economic development, construction engineering plays an important role. In the actual construction process of engineering projects, there is a large mobility of personnel and places, and it involves a wide range. Therefore, it is difficult to carry out management work. With the improvement of the current level of science and technology, in the current stage of construction project management, the effective application of information technology can greatly improve the management level, help construction enterprises seize market share and improve their competitive strength. Based on this, this paper analyzes in detail the application measures of information technology in construction engineering management in the new era.
