In recent years, cardiovascular and cerebrovascular diseases have seriously jeopardized people’s health. Double-high (hyperlipidemia and hypertension) is one of the main causes of cardiovascular and cerebrovascular d...In recent years, cardiovascular and cerebrovascular diseases have seriously jeopardized people’s health. Double-high (hyperlipidemia and hypertension) is one of the main causes of cardiovascular and cerebrovascular diseases in clinical practice. To diagnose cardiovascular and cerebrovascular diseases early, a reliable prediction system should be developed to assist doctors. In this paper, the different elements and evaluate the weight of these elements on double-high diseases are analyzed by machine learning method. The LightGBM algorithm and XGBoost algorithm were employed to construct the prediction models, respectively. Significantly, the proposed model was trained by real physical examination data and five meaningful and useful biochemical indicators were selected to encoding the raw physical examination data to numerical vector. The selected features are systolic blood pressure, diastolic blood pressure, serum triglyceride, serum high-density lipoprotein and serum low-density lipoprotein. The mean square error (MSE) after calculating the logarithm of the predicted value and the true value was introduced to assess the prediction model. Results show that this model can effectively predict cardiovascular and cerebrovascular diseases in advance.展开更多
In order to provide direct evidence for the use of fire by humans at Locality 1,Zhoukoudian,we examine the burnt and unburnt sediments of newly excavated area in Layer 4 by detailed measurements of magnetic susceptibi...In order to provide direct evidence for the use of fire by humans at Locality 1,Zhoukoudian,we examine the burnt and unburnt sediments of newly excavated area in Layer 4 by detailed measurements of magnetic susceptibility,color,and diffuse reflectance spectrum.Results show that the magnetic susceptibility and redness of the burnt sediments are remarkably higher than those of other areas on the same level:up to*22 times for magnetic susceptibility and*3 times for redness of those of the adjacent unburnt sediments.Fine-grained(superparamagnetic/stable single-domain)magnetite and hematite grains make dominant contributions to the distinctly high values of magnetic susceptibility and redness in the burnt sediments.Diffuse reflectance spectroscopy results show that the burnt sediments contain more hematite than those of other areas and localities 2 and 3.High-temperature magnetic susceptibility measurements demonstrate that the burnt sediments have been heated above 700°C.Those changes in low-frequency magnetic susceptibility and redness are impossibly resulted from natural fires,thus most likely signaling the human activities of controlled use of fire.However,further work is needed to confirm whether or not these heat-affected sediments were produced in situ.展开更多
For decades,the so-called Peking Man(Homo erectus pekinensis)at Zhoukoudian has been considered to be a hominin that engaged in the controlled production and management of fire.However,relatively recent analyses have ...For decades,the so-called Peking Man(Homo erectus pekinensis)at Zhoukoudian has been considered to be a hominin that engaged in the controlled production and management of fire.However,relatively recent analyses have cast doubt on this assertion.The most compelling reason for this doubt was the absence of siliceous aggregates in the Zhoukoudian deposits.This study presents evidence establishing the controlled use of fire by Homo erectus pekinensis through analyses of four soil samples sourced from Layers 4 and 6 at Zhoukoudian Locality 1.These results demonstrate that all four specimens contain siliceous aggregates as well as elemental carbon,and the potassium content of the insoluble residues of these specimens ranges between 1.21%and 2.94%.The analyses provide strong evidence of the in situ use of fire by Homo erectus pekinensis.展开更多
The stability of the linear chain structure of three α clusters for 12C against the bending and fission is investigated in the cranking covariant density functional theory, in which the equation of motion is solved o...The stability of the linear chain structure of three α clusters for 12C against the bending and fission is investigated in the cranking covariant density functional theory, in which the equation of motion is solved on a 3D lattice with the inverse Hamiltonian and the Fourier spectral methods. Starting from a twisted three α initial configuration, it is found that the linear chain structure is stable when the rotational frequency is within the range of ~2.0-~2.5 MeV. Beyond this range, the final states are not stable against fission. By examining the density distributions and the occupation of single-particle levels, however, these fissions are found to arise from the occupation of unphysical continuum with large angular momenta. To properly remove these unphysical continuum, a damping function for the cranking term is introduced. Eventually, the stable linear chain structure could survive up to the rotational frequency ~3.5 MeV, but the fission still occurs when the rotational frequency approaches ~4.0 MeV.展开更多
Hominin-animal interactions at Pleistocene archaeological sites have been the main subject of research during human evolution. However, in contrast to that of ungulates, little is known about the evidence of human pro...Hominin-animal interactions at Pleistocene archaeological sites have been the main subject of research during human evolution. However, in contrast to that of ungulates, little is known about the evidence of human processing of carnivore species in this time interval of China. In this paper, we present the first case report of an interactive relationship between carnivore species and hunter-gathers in Pleistocene China, based mainly on a detailed taphonomic study of the faunal remains from Shuidonggou Locality 7. It seems highly probable that hominins butchered some individuals of carnivores and roasted bone elements with adhering meat at the site;whereas it’s equally feasible that these animals were exploited by hominins mainly for their pelt or fur. In either way, evidence from the site indicates novel strategies in adaptive behaviors adopted by Late Pleistocene foragers in harsh environments of Northwest China.展开更多
The'island of inversion'has been known for over a quarter century,since Warburton et al.[1]proposed that nuclei with intruder ground states would constitute a 3×3 square with Z=10-12,N=20-22 in 1990.Uncov...The'island of inversion'has been known for over a quarter century,since Warburton et al.[1]proposed that nuclei with intruder ground states would constitute a 3×3 square with Z=10-12,N=20-22 in 1990.Uncovering the underlying inversion mechanism and exploring the scope of the island have attracted significant theoretical and experimental efforts in the following years.Now it is well known that the reduction of N=20 shell gap,which is likely caused by the展开更多
基金the National Natural Science Foundation of China (Nos. 61772227,61702214)the Development Project of Jilin Province of China (Nos 20170101006JC, 20170203002GX, 20190201293JC). This work was also supported by Jilin Provincial Key Laboratory of Big Date Intelligent Computing (No. 20180622002JC).
文摘In recent years, cardiovascular and cerebrovascular diseases have seriously jeopardized people’s health. Double-high (hyperlipidemia and hypertension) is one of the main causes of cardiovascular and cerebrovascular diseases in clinical practice. To diagnose cardiovascular and cerebrovascular diseases early, a reliable prediction system should be developed to assist doctors. In this paper, the different elements and evaluate the weight of these elements on double-high diseases are analyzed by machine learning method. The LightGBM algorithm and XGBoost algorithm were employed to construct the prediction models, respectively. Significantly, the proposed model was trained by real physical examination data and five meaningful and useful biochemical indicators were selected to encoding the raw physical examination data to numerical vector. The selected features are systolic blood pressure, diastolic blood pressure, serum triglyceride, serum high-density lipoprotein and serum low-density lipoprotein. The mean square error (MSE) after calculating the logarithm of the predicted value and the true value was introduced to assess the prediction model. Results show that this model can effectively predict cardiovascular and cerebrovascular diseases in advance.
基金supported by the Ministry of Science and Technology of China(2007FY110200)
文摘In order to provide direct evidence for the use of fire by humans at Locality 1,Zhoukoudian,we examine the burnt and unburnt sediments of newly excavated area in Layer 4 by detailed measurements of magnetic susceptibility,color,and diffuse reflectance spectrum.Results show that the magnetic susceptibility and redness of the burnt sediments are remarkably higher than those of other areas on the same level:up to*22 times for magnetic susceptibility and*3 times for redness of those of the adjacent unburnt sediments.Fine-grained(superparamagnetic/stable single-domain)magnetite and hematite grains make dominant contributions to the distinctly high values of magnetic susceptibility and redness in the burnt sediments.Diffuse reflectance spectroscopy results show that the burnt sediments contain more hematite than those of other areas and localities 2 and 3.High-temperature magnetic susceptibility measurements demonstrate that the burnt sediments have been heated above 700°C.Those changes in low-frequency magnetic susceptibility and redness are impossibly resulted from natural fires,thus most likely signaling the human activities of controlled use of fire.However,further work is needed to confirm whether or not these heat-affected sediments were produced in situ.
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA05130202)was identified as a Major Basic Research Project of the Ministry of Science and Technology of China(2007FY110200)Support was also received from the State Administration of Work Safety
文摘For decades,the so-called Peking Man(Homo erectus pekinensis)at Zhoukoudian has been considered to be a hominin that engaged in the controlled production and management of fire.However,relatively recent analyses have cast doubt on this assertion.The most compelling reason for this doubt was the absence of siliceous aggregates in the Zhoukoudian deposits.This study presents evidence establishing the controlled use of fire by Homo erectus pekinensis through analyses of four soil samples sourced from Layers 4 and 6 at Zhoukoudian Locality 1.These results demonstrate that all four specimens contain siliceous aggregates as well as elemental carbon,and the potassium content of the insoluble residues of these specimens ranges between 1.21%and 2.94%.The analyses provide strong evidence of the in situ use of fire by Homo erectus pekinensis.
基金supported by the National Natural Science Foundation of China (11875075, 11935003, 11975031, and 11621131001)the National Key R&D Program of China (2018YFA0404400 and 2017YFE0116700)+1 种基金the State Key Laboratory of Nuclear Physics and Technology, Peking University (NPT2020ZZ01)the China Postdoctoral Science Foundation (2020M670014)。
基金supported by the National Key R&D Program of China(Grant Nos.2018YFA0404400,and 2017YFE0116700)the National Natural Science Foundation of China(Grant Nos.11621131001,and 11875075)the Laboratory Computing Resource Center at Argonne National Laboratory
文摘The stability of the linear chain structure of three α clusters for 12C against the bending and fission is investigated in the cranking covariant density functional theory, in which the equation of motion is solved on a 3D lattice with the inverse Hamiltonian and the Fourier spectral methods. Starting from a twisted three α initial configuration, it is found that the linear chain structure is stable when the rotational frequency is within the range of ~2.0-~2.5 MeV. Beyond this range, the final states are not stable against fission. By examining the density distributions and the occupation of single-particle levels, however, these fissions are found to arise from the occupation of unphysical continuum with large angular momenta. To properly remove these unphysical continuum, a damping function for the cranking term is introduced. Eventually, the stable linear chain structure could survive up to the rotational frequency ~3.5 MeV, but the fission still occurs when the rotational frequency approaches ~4.0 MeV.
基金supported by the National Natural Science Foundation of China (Grant Nos. 41672023 & 41772025)
文摘Hominin-animal interactions at Pleistocene archaeological sites have been the main subject of research during human evolution. However, in contrast to that of ungulates, little is known about the evidence of human processing of carnivore species in this time interval of China. In this paper, we present the first case report of an interactive relationship between carnivore species and hunter-gathers in Pleistocene China, based mainly on a detailed taphonomic study of the faunal remains from Shuidonggou Locality 7. It seems highly probable that hominins butchered some individuals of carnivores and roasted bone elements with adhering meat at the site;whereas it’s equally feasible that these animals were exploited by hominins mainly for their pelt or fur. In either way, evidence from the site indicates novel strategies in adaptive behaviors adopted by Late Pleistocene foragers in harsh environments of Northwest China.
基金supported by the National Natural Science Foundation of China(Grant Nos.11575006,11675003,11375017,11235001,11335002, 11375015,11320101004,and 11461141002)the China Postdoctoral Science Foundation(Grant Nos.2015M580007,and 2016T90007)the Chinese Major State Basic Research Development Program(Grant No.2013CB834400)
文摘The'island of inversion'has been known for over a quarter century,since Warburton et al.[1]proposed that nuclei with intruder ground states would constitute a 3×3 square with Z=10-12,N=20-22 in 1990.Uncovering the underlying inversion mechanism and exploring the scope of the island have attracted significant theoretical and experimental efforts in the following years.Now it is well known that the reduction of N=20 shell gap,which is likely caused by the
