Lepton scattering is an established ideal tool for studying inner structure of small particles such as nucleons as well as nuclei.As a future high energy nuclear physics project,an Electron-ion collider in China(EicC)...Lepton scattering is an established ideal tool for studying inner structure of small particles such as nucleons as well as nuclei.As a future high energy nuclear physics project,an Electron-ion collider in China(EicC)has been proposed.It will be constructed based on an upgraded heavy-ion accelerator,High Intensity heavy-ion Accelerator Facility(HIAF)which is currently under construction,together with a new electron ring.The proposed collider will provide highly polarized electrons(with a po-larization of 80%)and protons(with a polarization of 70%)with variable center of mass energies from 15 to 20 GeV and the luminosity of(2–3)×1033 cm^(−2)·s^(−1).Polarized deuterons and Helium-3,as well as unpolarized ion beams from Carbon to Uranium,will be also available at the EicC.The main foci of the EicC will be precision measurements of the structure of the nucleon in the sea quark region,including 3D tomography of nucleon;the partonic structure of nuclei and the parton interaction with the nuclear environment;the exotic states,especially those with heavy flavor quark contents.In addition,issues fundamental to understanding the origin of mass could be addressed by measurements of heavy quarkonia near-threshold production at the EicC.In order to achieve the above-mentioned physics goals,a hermetical detector system will be constructed with cutting-edge technologies.This document is the result of collective contributions and valuable inputs from experts across the globe.The EicC physics program complements the ongoing scientific programs at the Jefferson Laboratory and the future EIC project in the United States.The success of this project will also advance both nuclear and particle physics as well as accelerator and detector technology in China.展开更多
To the Editor:Lipohypertrophy(LH)is the most common local complication caused by multiple overlapping insulin injections.Clinically,LH manifests as prominent and/or thickened tissue at injection or infusion sites,some...To the Editor:Lipohypertrophy(LH)is the most common local complication caused by multiple overlapping insulin injections.Clinically,LH manifests as prominent and/or thickened tissue at injection or infusion sites,sometimes resulting in lump formation under the skin.Histologically,LH is characterized by decreased vascularity,fibrosis,and adipocyte enlargement and proliferation in the subcutaneous tissue at insulin injection sites.Because of this,the existing screening methods for LH are mainly based on clinical examination and ultrasound scanning(USS).A recent systematic review revealed that only limited information is available for detection sensitivity among the different methods used to identify LH to date.Thus far,the gold standard examination for LH diagnosis remains debatable and there has been insufficient research on which patients require both kinds of examination.Currently,the detection sensitivity of USS vs.clinical examination for LH has not been reported in large sample-based studies.The present study aimed to compare the detection accuracy between USS and clinical examination using a large patient cohort and to determine the influencing factors for inconsistent detection results of LH between the two methods.展开更多
Variation of wind speed and the physico-chemical parameters,such as dissolved phosphate,ferrous and manganese in lake water were observed on site.Together with the chemistry analysis and simulated experiment in lab,th...Variation of wind speed and the physico-chemical parameters,such as dissolved phosphate,ferrous and manganese in lake water were observed on site.Together with the chemistry analysis and simulated experiment in lab,the change of phosphate concentration in lake water was analyzed.The variation of ferrous/phosphate ratio explained that along with the enhancement of wind-wave effect and the oxidation ability of lake water,the effects of co-precipitation and removal of dissolved phosphate and iron in the lake water were reinforced.The ferrous/phosphate ratio in pore water was less than 2.0,demonstrating that the dissolved phosphate can be released into the overlying water.But,in the lake water,the stability of phosphate was controlled by the water dynamics.The phosphate release experiment showed that molecular release was only part of the whole and the direct discharge of phosphate in the pore water was also a part.The mineralization and biological process of suspended particulates in the water may be another important reason for the whole phosphate loadings.展开更多
It becomes a key technology to measure the concentration of the vehicle exhaust components with the absorption spectra. But because of the overlap of gas absorption bands, how to separate the absorption information of...It becomes a key technology to measure the concentration of the vehicle exhaust components with the absorption spectra. But because of the overlap of gas absorption bands, how to separate the absorption information of each component gas from the mixed absorption spectra has become the key point to restrict the precision of the optical detection method. In this paper, the ex-perimental platform for the absorption spectrum of vehicle exhaust components has been established. Based on the ultraviolet absorption spectra measured with the platform of exhaust gas NO & NO2, the concentration regression model for the two components has been established with weighted partial least squares regression (WPLS). Finally the each spectral characteristic information of NO & NO2 gas has been separated and the concentration of each corresponding component has been reversed successfully.展开更多
文摘Lepton scattering is an established ideal tool for studying inner structure of small particles such as nucleons as well as nuclei.As a future high energy nuclear physics project,an Electron-ion collider in China(EicC)has been proposed.It will be constructed based on an upgraded heavy-ion accelerator,High Intensity heavy-ion Accelerator Facility(HIAF)which is currently under construction,together with a new electron ring.The proposed collider will provide highly polarized electrons(with a po-larization of 80%)and protons(with a polarization of 70%)with variable center of mass energies from 15 to 20 GeV and the luminosity of(2–3)×1033 cm^(−2)·s^(−1).Polarized deuterons and Helium-3,as well as unpolarized ion beams from Carbon to Uranium,will be also available at the EicC.The main foci of the EicC will be precision measurements of the structure of the nucleon in the sea quark region,including 3D tomography of nucleon;the partonic structure of nuclei and the parton interaction with the nuclear environment;the exotic states,especially those with heavy flavor quark contents.In addition,issues fundamental to understanding the origin of mass could be addressed by measurements of heavy quarkonia near-threshold production at the EicC.In order to achieve the above-mentioned physics goals,a hermetical detector system will be constructed with cutting-edge technologies.This document is the result of collective contributions and valuable inputs from experts across the globe.The EicC physics program complements the ongoing scientific programs at the Jefferson Laboratory and the future EIC project in the United States.The success of this project will also advance both nuclear and particle physics as well as accelerator and detector technology in China.
基金This work was supported by grants from the Jiangsu Provincial Medical Innovation Team(No.CXTDA2017019)the Clinical Ability Improvement Project of Jiangsu Province Hospital(No.JSPH-NB-2020-2)。
文摘To the Editor:Lipohypertrophy(LH)is the most common local complication caused by multiple overlapping insulin injections.Clinically,LH manifests as prominent and/or thickened tissue at injection or infusion sites,sometimes resulting in lump formation under the skin.Histologically,LH is characterized by decreased vascularity,fibrosis,and adipocyte enlargement and proliferation in the subcutaneous tissue at insulin injection sites.Because of this,the existing screening methods for LH are mainly based on clinical examination and ultrasound scanning(USS).A recent systematic review revealed that only limited information is available for detection sensitivity among the different methods used to identify LH to date.Thus far,the gold standard examination for LH diagnosis remains debatable and there has been insufficient research on which patients require both kinds of examination.Currently,the detection sensitivity of USS vs.clinical examination for LH has not been reported in large sample-based studies.The present study aimed to compare the detection accuracy between USS and clinical examination using a large patient cohort and to determine the influencing factors for inconsistent detection results of LH between the two methods.
基金supported by the Knowledge Innovation Project of the Chinese Academy of Sciences(Grant No.KZCX1-SW-12)the National Natural Science Foundation of China(Grant No.40501064)the State Key Project of Science and Technology in"Tenth Five-Year Plan"of China,"863"(Grant No.2002AA601013).
文摘Variation of wind speed and the physico-chemical parameters,such as dissolved phosphate,ferrous and manganese in lake water were observed on site.Together with the chemistry analysis and simulated experiment in lab,the change of phosphate concentration in lake water was analyzed.The variation of ferrous/phosphate ratio explained that along with the enhancement of wind-wave effect and the oxidation ability of lake water,the effects of co-precipitation and removal of dissolved phosphate and iron in the lake water were reinforced.The ferrous/phosphate ratio in pore water was less than 2.0,demonstrating that the dissolved phosphate can be released into the overlying water.But,in the lake water,the stability of phosphate was controlled by the water dynamics.The phosphate release experiment showed that molecular release was only part of the whole and the direct discharge of phosphate in the pore water was also a part.The mineralization and biological process of suspended particulates in the water may be another important reason for the whole phosphate loadings.
文摘It becomes a key technology to measure the concentration of the vehicle exhaust components with the absorption spectra. But because of the overlap of gas absorption bands, how to separate the absorption information of each component gas from the mixed absorption spectra has become the key point to restrict the precision of the optical detection method. In this paper, the ex-perimental platform for the absorption spectrum of vehicle exhaust components has been established. Based on the ultraviolet absorption spectra measured with the platform of exhaust gas NO & NO2, the concentration regression model for the two components has been established with weighted partial least squares regression (WPLS). Finally the each spectral characteristic information of NO & NO2 gas has been separated and the concentration of each corresponding component has been reversed successfully.
