2016 Amazing China - The Most Attractive Chinese Cities for Foreigners election were released. 1701 foreign experts participated in a survey along with the election. The survey is mainly about expats’ working and liv...2016 Amazing China - The Most Attractive Chinese Cities for Foreigners election were released. 1701 foreign experts participated in a survey along with the election. The survey is mainly about expats’ working and living environment in china . Why they come to china? What factors affect their choice in cities? Are they satisfied with their salary? We will disclose the details for you.展开更多
ECO-88D Double Rope High Speed Dyeing Machine ECO-88D Double Rope High Speed Dyeing Machine is suitable for the processing of light to medium weight fabric made from synthetic ber. Fabric structure suitable for the dy...ECO-88D Double Rope High Speed Dyeing Machine ECO-88D Double Rope High Speed Dyeing Machine is suitable for the processing of light to medium weight fabric made from synthetic ber. Fabric structure suitable for the dyeing process inside the ECO-88D includes woven,展开更多
Everyone likes a fantastic story.But is it better in a book or a movie?Some people enjoy books better.A book gives more details than a movie.Those details help readers understand the characters and story be社er.When y...Everyone likes a fantastic story.But is it better in a book or a movie?Some people enjoy books better.A book gives more details than a movie.Those details help readers understand the characters and story be社er.When you read,you can imagine the story your own way.展开更多
Correction to:Nuclear Science and Techniques(2024)36:8 https://doi.org/10.1007/s41365-024-01570-7 In this article the affiliation details for Author Jian Shan were incorrectly given as‘College of Physics and Electron...Correction to:Nuclear Science and Techniques(2024)36:8 https://doi.org/10.1007/s41365-024-01570-7 In this article the affiliation details for Author Jian Shan were incorrectly given as‘College of Physics and Electronic Engi-neering,Hengyang Normal University,Hengyang 421008,China’but should have been‘School of Nuclear Science and Technology,University of South China,Hengyang 421001,China’.The original article has been corrected.展开更多
With the increasing demand for high-resolution x-ray tomography in battery characterization,the challenges of storing,transmitting,and analyzing substantial imaging data necessitate more efficient solutions.Traditiona...With the increasing demand for high-resolution x-ray tomography in battery characterization,the challenges of storing,transmitting,and analyzing substantial imaging data necessitate more efficient solutions.Traditional data compression methods struggle to balance reduction ratio and image quality,often failing to preserve critical details for accurate analysis.This study proposes a machine learning-assisted compression method tailored for battery x-ray imaging data.Leveraging physics-informed representation learning,our approach significantly reduces file sizes without sacrificing meaningful information.We validate the method on typical battery materials and different x-ray imaging techniques,demonstrating its effectiveness in preserving structural and chemical details.Experimental results show an up-to-95 compression ratio while maintaining high fidelity in the projection and reconstructed images.The proposed framework provides a promising solution for managing large-scale battery x-ray imaging datasets,facilitating significant advancements in battery research and development.展开更多
Brick carving,a complex and expressive art form,plays a vital role in preserving traditional Cantonese culture.This traditional craft,celebrated for its delicate details and cultural significance,was the focus of a re...Brick carving,a complex and expressive art form,plays a vital role in preserving traditional Cantonese culture.This traditional craft,celebrated for its delicate details and cultural significance,was the focus of a recent educational visit by students from Xiangxian High School to the Ho Shiliang Art Museum(何世良艺术馆)in Shawan Ancient Town.展开更多
The rise in breast cancer diagnoses among Chinese women has necessitated the use of X-ray breast screening,which carries a radiation risk.This study aimed to provide a dosimetry protocol for the Chinese female populat...The rise in breast cancer diagnoses among Chinese women has necessitated the use of X-ray breast screening,which carries a radiation risk.This study aimed to provide a dosimetry protocol for the Chinese female population to replace the traditional standard that utilizes simplified breast models,for the accurate estimation of the mean glandular dose of a patient undergoing digital breast tomosynthesis(DBT).The first set of detailed Chinese female breast models and representative breast parameters was constructed.Considering backscatter radiation and computational efficiency,we improved the combination of these models and the Chinese reference adult female whole-body voxel phantom.Image acquisition for four commercial DBT systems that are widely employed in China was simulated using the Monte Carlo method to obtain the normalized glandular dose coefficients of DBT(D_(gN)^(DBT))and the glandular depth dose(D_(g)^(dep)(z))for different breast characteristics and X-ray spectra.We calculated a series of D_(gN)^(DBT) values for breasts with different percentage mass glandularities(5%,25%,50%,75%,and 100%)and compressed breast thicknesses(2,3,4,5,6,and 7 cm)at various tube potentials(25,28,30,32,35,and 49 kV)and target/filter combinations(W/Rh,W/Al,Mo/Mo,Rh/Rh,and Rh/Ag).The parameter dependence of the breast characteristics and beam conditions on D_(gN)^(DBT) in detailed breast models was investigated.The D_(gN)^(DBT) results were 14.6-51.0%lower than those of the traditional dosimetry standard in China.The difference in D_(gN)^(DBT) was mainly due to a decrease in the depth of the main energy deposition area caused by the glandular distribution along the depth direction.The results obtained in this study may be used to improve breast dosimetry in China and provide more detailed information on risk assessment during DBT.展开更多
从2012年开始,说到可视化编程工具,很多小学信息技术教师首先会想到Scratch。其实在2012年,微软研究院也开发了一款可视化编程工具——Kodu（酷豆）游戏实验室（Kodu Game Lab）（如图1）,它与Scratch程序设计最大的不同点就是,这是一...从2012年开始,说到可视化编程工具,很多小学信息技术教师首先会想到Scratch。其实在2012年,微软研究院也开发了一款可视化编程工具——Kodu（酷豆）游戏实验室（Kodu Game Lab）（如图1）,它与Scratch程序设计最大的不同点就是,这是一款可视化3D游戏编程工具,在界面感受上,它与同年在全球火热的一款游戏《我的世界》有着很大的关联,所以,学生上手之快超过以往任何一款编程工具。展开更多
We present a quantum hyperdense coding protocol with hyperentanglement in polarization and spatial-mode degrees of freedom of photons first and then give the details for a quantum secure direct communication(QSDC)prot...We present a quantum hyperdense coding protocol with hyperentanglement in polarization and spatial-mode degrees of freedom of photons first and then give the details for a quantum secure direct communication(QSDC)protocol based on this quantum hyperdense coding protocol.This QSDC protocol has the advantage of having a higher capacity than the quantum communication protocols with a qubit system.Compared with the QSDC protocol based on superdense coding with𝑑-dimensional systems,this QSDC protocol is more feasible as the preparation of a high-dimension quantum system is more difficult than that of a two-level quantum system at present.展开更多
Experiments were statistically carried out on the behavior of the vertical-Bloch-line(VBL)chains of the first kind of dumbbell domains(IDs)in garnet bubble films subjected to an in-plane field,Hip.It was found that fo...Experiments were statistically carried out on the behavior of the vertical-Bloch-line(VBL)chains of the first kind of dumbbell domains(IDs)in garnet bubble films subjected to an in-plane field,Hip.It was found that for IDs the critical in-plane field,(Hip)ID,above which their VBL chains disappear,is the same as that of ordinary hard bubbles(OHBs),H'ip.However,for IDS,the critical range of Hip for VBL chain softening is larger than that of OHBs.Besides,we also found some details of the softening process,e.g.,the collapse field range of the remaining IDs shrinks rapidly towards H_(0,mas),and this very narrow range can maintain until all IDs are softened.展开更多
Why heavily parameterized neural networks(NNs) do not overfit the data is an important long standing open question. We propose a phenomenological model of the NN training to explain this non-overfitting puzzle. Our li...Why heavily parameterized neural networks(NNs) do not overfit the data is an important long standing open question. We propose a phenomenological model of the NN training to explain this non-overfitting puzzle. Our linear frequency principle(LFP) model accounts for a key dynamical feature of NNs: they learn low frequencies first, irrespective of microscopic details. Theory based on our LFP model shows that low frequency dominance of target functions is the key condition for the non-overfitting of NNs and is verified by experiments. Furthermore,through an ideal two-layer NN, we unravel how detailed microscopic NN training dynamics statistically gives rise to an LFP model with quantitative prediction power.展开更多
The SARS-CoV-2 Omicron variant has become the dominant variant in the world.Uncovering the structural basis of altered immune response and enhanced transmission of Omicron is particularly important.Here,taking twenty-...The SARS-CoV-2 Omicron variant has become the dominant variant in the world.Uncovering the structural basis of altered immune response and enhanced transmission of Omicron is particularly important.Here,taking twenty-five antibodies from four groups as examples,we comprehensively reveal the underlying mechanism of how mutations in Omicron induces the weak neutralization by using molecular simulations.Overall,the binding strength of 68%antibodies is weakened in Omicron,much larger than that in Delta(40%).Specifically,the percentage of the weakened antibodies vary largely in different groups.Moreover,the mutation-induced repulsion is mainly responsive for the weak neutralization in AB/CD groups but does not take effect in EF group.Significantly,we demonstrate that the disappearance of hydrophobic interaction and salt bridges due to residue deletions contributes to the decreased binding energy in NTD group.This work provides unprecedented atomistic details for the distinct neutralization of WT/Delta/Omicron,which informs prospective efforts to design antibodies/vaccines against Omicron.展开更多
The deformed relativistic Hartree theory(DRH)is solved both in coordinate space(DRH-c)and in harmonic oscillator basis(DRH-o).Results obtained from these two methods are compared in details.The DRH-c and DRH-o calcula...The deformed relativistic Hartree theory(DRH)is solved both in coordinate space(DRH-c)and in harmonic oscillator basis(DRH-o).Results obtained from these two methods are compared in details.The DRH-c and DRH-o calculations give similar total binding energies,deformation,level structures and radii for nitrogen iso topes,while their descriptions on the density distributions for drip-line nuclei are very different.The large spatiai istributions of nucleon densities,which is crucial to understand a weakly bound system,can only be obtained by DRH-c calculations.This implies that the DRH theory should be solved in coordinate space in order to describe uclei close to the drip line.展开更多
Based on the perturbation theory and Bernoulli equation,equations of aspherical oscillation of two interacting bubbles are derived.This system is then used for the numerical investigation of the deformation of the two...Based on the perturbation theory and Bernoulli equation,equations of aspherical oscillation of two interacting bubbles are derived.This system is then used for the numerical investigation of the deformation of the two bubbles' surfaces in a spherical ultrasound field in liquid.We find that the details of the aspherical oscillation of two bubbles are shown by the analysis of a2(t) and b2(t) that describe the surface deformation of bubbles 1 and 2,respectively.展开更多
介词 IN 在英语中的使用是极为广泛的。本文不拟全面谈论它的各种用法,仅就它所构成的儿类主要的介词习语形式作一探讨。Frederick T.Wood 在 English PrepositionalTdioms 中谈及 IN 与形容词构成的介词习语。这类习语有两种形式,一种...介词 IN 在英语中的使用是极为广泛的。本文不拟全面谈论它的各种用法,仅就它所构成的儿类主要的介词习语形式作一探讨。Frederick T.Wood 在 English PrepositionalTdioms 中谈及 IN 与形容词构成的介词习语。这类习语有两种形式,一种主要用以表达形式或方式等意义,形容词前不出现定冠词:1.It would take a long time to go into allthe details.but I can give you the facts in brief.2.You should avoid eating fat meat。展开更多
The open and dynamic environment of Internet computing demands new software reliability technologies.How to efficiently and effectively build highly reliable Internet applications becomes a critical research problem.T...The open and dynamic environment of Internet computing demands new software reliability technologies.How to efficiently and effectively build highly reliable Internet applications becomes a critical research problem.This paper proposes a research framework for predicting reliability of individual software entities as well as the whole Internet application.Characteristics of the Internet environment are comprehensively analyzed and several reliability prediction approaches are proposed.A prototype is implemented and practical use of the proposed framework is also demonstrated.展开更多
A tangentially visible imaging system has been developed on the Experimental Advanced Superconducting Tokamak（EAST） to record the full cross-section plasma visible radiation with speed up to 7500 frames per second a...A tangentially visible imaging system has been developed on the Experimental Advanced Superconducting Tokamak（EAST） to record the full cross-section plasma visible radiation with speed up to 7500 frames per second at full resolution or much faster for a limited number of pixels.The edge localized mode（ELM） filaments during ELM eruptions in H-modes are captured.Using these pictures,the current in the filament is estimated.展开更多
yellow book 很容易使初学者误译为“黄色书刊”、“淫秽书刊”。而它的真正含义则是黄皮书。其首字母常大写。如:The Hungarian government issues a Yellow Book in which it details itscharges of treason.匈牙政府发表详细指控其...yellow book 很容易使初学者误译为“黄色书刊”、“淫秽书刊”。而它的真正含义则是黄皮书。其首字母常大写。如:The Hungarian government issues a Yellow Book in which it details itscharges of treason.匈牙政府发表详细指控其叛国的黄皮书。黄皮书指的是法国等政府或议会正式发表的重要文件或报告书。这类文件或报告书的封面惯用黄颜色,故称黄皮书。这里的 yellow 与淫秽色情无关,展开更多
文摘2016 Amazing China - The Most Attractive Chinese Cities for Foreigners election were released. 1701 foreign experts participated in a survey along with the election. The survey is mainly about expats’ working and living environment in china . Why they come to china? What factors affect their choice in cities? Are they satisfied with their salary? We will disclose the details for you.
文摘ECO-88D Double Rope High Speed Dyeing Machine ECO-88D Double Rope High Speed Dyeing Machine is suitable for the processing of light to medium weight fabric made from synthetic ber. Fabric structure suitable for the dyeing process inside the ECO-88D includes woven,
文摘Everyone likes a fantastic story.But is it better in a book or a movie?Some people enjoy books better.A book gives more details than a movie.Those details help readers understand the characters and story be社er.When you read,you can imagine the story your own way.
文摘Correction to:Nuclear Science and Techniques(2024)36:8 https://doi.org/10.1007/s41365-024-01570-7 In this article the affiliation details for Author Jian Shan were incorrectly given as‘College of Physics and Electronic Engi-neering,Hengyang Normal University,Hengyang 421008,China’but should have been‘School of Nuclear Science and Technology,University of South China,Hengyang 421001,China’.The original article has been corrected.
基金supported by the New Energy Vehicle Power Battery Life Cycle Testing and Verification Public Service Platform Project(Grant No.2022-235-224)the National Natural Science Foundation of China(Grant No.52303301)M.Ng’s research is supported in part by the HKRGC GRF 17201020 and 17300021,HKRGC CRF C7004-21GF,and Joint NSFCRGC N-HKU769/21。
文摘With the increasing demand for high-resolution x-ray tomography in battery characterization,the challenges of storing,transmitting,and analyzing substantial imaging data necessitate more efficient solutions.Traditional data compression methods struggle to balance reduction ratio and image quality,often failing to preserve critical details for accurate analysis.This study proposes a machine learning-assisted compression method tailored for battery x-ray imaging data.Leveraging physics-informed representation learning,our approach significantly reduces file sizes without sacrificing meaningful information.We validate the method on typical battery materials and different x-ray imaging techniques,demonstrating its effectiveness in preserving structural and chemical details.Experimental results show an up-to-95 compression ratio while maintaining high fidelity in the projection and reconstructed images.The proposed framework provides a promising solution for managing large-scale battery x-ray imaging datasets,facilitating significant advancements in battery research and development.
文摘Brick carving,a complex and expressive art form,plays a vital role in preserving traditional Cantonese culture.This traditional craft,celebrated for its delicate details and cultural significance,was the focus of a recent educational visit by students from Xiangxian High School to the Ho Shiliang Art Museum(何世良艺术馆)in Shawan Ancient Town.
基金supported by the National Natural Science Foundation of China(Nos.U2167209 and 12175114)the National Key R&D Program of China(No.2021YFF0603600).
文摘The rise in breast cancer diagnoses among Chinese women has necessitated the use of X-ray breast screening,which carries a radiation risk.This study aimed to provide a dosimetry protocol for the Chinese female population to replace the traditional standard that utilizes simplified breast models,for the accurate estimation of the mean glandular dose of a patient undergoing digital breast tomosynthesis(DBT).The first set of detailed Chinese female breast models and representative breast parameters was constructed.Considering backscatter radiation and computational efficiency,we improved the combination of these models and the Chinese reference adult female whole-body voxel phantom.Image acquisition for four commercial DBT systems that are widely employed in China was simulated using the Monte Carlo method to obtain the normalized glandular dose coefficients of DBT(D_(gN)^(DBT))and the glandular depth dose(D_(g)^(dep)(z))for different breast characteristics and X-ray spectra.We calculated a series of D_(gN)^(DBT) values for breasts with different percentage mass glandularities(5%,25%,50%,75%,and 100%)and compressed breast thicknesses(2,3,4,5,6,and 7 cm)at various tube potentials(25,28,30,32,35,and 49 kV)and target/filter combinations(W/Rh,W/Al,Mo/Mo,Rh/Rh,and Rh/Ag).The parameter dependence of the breast characteristics and beam conditions on D_(gN)^(DBT) in detailed breast models was investigated.The D_(gN)^(DBT) results were 14.6-51.0%lower than those of the traditional dosimetry standard in China.The difference in D_(gN)^(DBT) was mainly due to a decrease in the depth of the main energy deposition area caused by the glandular distribution along the depth direction.The results obtained in this study may be used to improve breast dosimetry in China and provide more detailed information on risk assessment during DBT.
文摘从2012年开始,说到可视化编程工具,很多小学信息技术教师首先会想到Scratch。其实在2012年,微软研究院也开发了一款可视化编程工具——Kodu（酷豆）游戏实验室（Kodu Game Lab）（如图1）,它与Scratch程序设计最大的不同点就是,这是一款可视化3D游戏编程工具,在界面感受上,它与同年在全球火热的一款游戏《我的世界》有着很大的关联,所以,学生上手之快超过以往任何一款编程工具。
基金Supported by the National Natural Science Foundation of China under Grant No 10974020the Beijing Natural Science Foundation under Grant No 1082008the Fundamental Research Funds for the Central Universities。
文摘We present a quantum hyperdense coding protocol with hyperentanglement in polarization and spatial-mode degrees of freedom of photons first and then give the details for a quantum secure direct communication(QSDC)protocol based on this quantum hyperdense coding protocol.This QSDC protocol has the advantage of having a higher capacity than the quantum communication protocols with a qubit system.Compared with the QSDC protocol based on superdense coding with𝑑-dimensional systems,this QSDC protocol is more feasible as the preparation of a high-dimension quantum system is more difficult than that of a two-level quantum system at present.
基金Supported in part by the National Natural Science Foundation of China,and by the Natural Science Foundation of Hebei Province.
文摘Experiments were statistically carried out on the behavior of the vertical-Bloch-line(VBL)chains of the first kind of dumbbell domains(IDs)in garnet bubble films subjected to an in-plane field,Hip.It was found that for IDs the critical in-plane field,(Hip)ID,above which their VBL chains disappear,is the same as that of ordinary hard bubbles(OHBs),H'ip.However,for IDS,the critical range of Hip for VBL chain softening is larger than that of OHBs.Besides,we also found some details of the softening process,e.g.,the collapse field range of the remaining IDs shrinks rapidly towards H_(0,mas),and this very narrow range can maintain until all IDs are softened.
基金Supported by the National Key R&D Program of China(Grant No.2019YFA0709503)the Shanghai Sailing Program+3 种基金the Natural Science Foundation of Shanghai(Grant No.20ZR1429000)the National Natural Science Foundation of China(Grant No.62002221)Shanghai Municipal of Science and Technology Project(Grant No.20JC1419500)the HPC of School of Mathematical Sciences at Shanghai Jiao Tong University。
文摘Why heavily parameterized neural networks(NNs) do not overfit the data is an important long standing open question. We propose a phenomenological model of the NN training to explain this non-overfitting puzzle. Our linear frequency principle(LFP) model accounts for a key dynamical feature of NNs: they learn low frequencies first, irrespective of microscopic details. Theory based on our LFP model shows that low frequency dominance of target functions is the key condition for the non-overfitting of NNs and is verified by experiments. Furthermore,through an ideal two-layer NN, we unravel how detailed microscopic NN training dynamics statistically gives rise to an LFP model with quantitative prediction power.
基金supported by the National Natural Science Foundation of China(Grant Nos.11874045,12222506,and 12174184)the Postgraduate Research&Practice Innovation Program of Jiangsu Province(Grant No.KYCX220086).
文摘The SARS-CoV-2 Omicron variant has become the dominant variant in the world.Uncovering the structural basis of altered immune response and enhanced transmission of Omicron is particularly important.Here,taking twenty-five antibodies from four groups as examples,we comprehensively reveal the underlying mechanism of how mutations in Omicron induces the weak neutralization by using molecular simulations.Overall,the binding strength of 68%antibodies is weakened in Omicron,much larger than that in Delta(40%).Specifically,the percentage of the weakened antibodies vary largely in different groups.Moreover,the mutation-induced repulsion is mainly responsive for the weak neutralization in AB/CD groups but does not take effect in EF group.Significantly,we demonstrate that the disappearance of hydrophobic interaction and salt bridges due to residue deletions contributes to the decreased binding energy in NTD group.This work provides unprecedented atomistic details for the distinct neutralization of WT/Delta/Omicron,which informs prospective efforts to design antibodies/vaccines against Omicron.
基金Supported in part by the Major State Basic Research Development Program Under Contract No.G2000077407National Natural Science Foundation of China under Grant Nos.19847002 and 19935030.
文摘The deformed relativistic Hartree theory(DRH)is solved both in coordinate space(DRH-c)and in harmonic oscillator basis(DRH-o).Results obtained from these two methods are compared in details.The DRH-c and DRH-o calculations give similar total binding energies,deformation,level structures and radii for nitrogen iso topes,while their descriptions on the density distributions for drip-line nuclei are very different.The large spatiai istributions of nucleon densities,which is crucial to understand a weakly bound system,can only be obtained by DRH-c calculations.This implies that the DRH theory should be solved in coordinate space in order to describe uclei close to the drip line.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10974095 and 11174145.
文摘Based on the perturbation theory and Bernoulli equation,equations of aspherical oscillation of two interacting bubbles are derived.This system is then used for the numerical investigation of the deformation of the two bubbles' surfaces in a spherical ultrasound field in liquid.We find that the details of the aspherical oscillation of two bubbles are shown by the analysis of a2(t) and b2(t) that describe the surface deformation of bubbles 1 and 2,respectively.
文摘介词 IN 在英语中的使用是极为广泛的。本文不拟全面谈论它的各种用法,仅就它所构成的儿类主要的介词习语形式作一探讨。Frederick T.Wood 在 English PrepositionalTdioms 中谈及 IN 与形容词构成的介词习语。这类习语有两种形式,一种主要用以表达形式或方式等意义,形容词前不出现定冠词:1.It would take a long time to go into allthe details.but I can give you the facts in brief.2.You should avoid eating fat meat。
基金supported by the National Natural Science Foundation of China(Project No.61472338,61332010)Guangdong Natural Science Foundation(Project No. 2014A030313151)+1 种基金the Fundamental Research Funds for the Central Universitiesthe Research Grants Council of the Hong Kong Special Administrative Region,China (No.415113)
文摘The open and dynamic environment of Internet computing demands new software reliability technologies.How to efficiently and effectively build highly reliable Internet applications becomes a critical research problem.This paper proposes a research framework for predicting reliability of individual software entities as well as the whole Internet application.Characteristics of the Internet environment are comprehensively analyzed and several reliability prediction approaches are proposed.A prototype is implemented and practical use of the proposed framework is also demonstrated.
基金supported by National Natural Science Foundation of China(Nos.11275047 and 11105028)the National Magnetic Confinement Fusion Science Program of China(No.2009GB10706)
文摘A tangentially visible imaging system has been developed on the Experimental Advanced Superconducting Tokamak（EAST） to record the full cross-section plasma visible radiation with speed up to 7500 frames per second at full resolution or much faster for a limited number of pixels.The edge localized mode（ELM） filaments during ELM eruptions in H-modes are captured.Using these pictures,the current in the filament is estimated.
文摘yellow book 很容易使初学者误译为“黄色书刊”、“淫秽书刊”。而它的真正含义则是黄皮书。其首字母常大写。如:The Hungarian government issues a Yellow Book in which it details itscharges of treason.匈牙政府发表详细指控其叛国的黄皮书。黄皮书指的是法国等政府或议会正式发表的重要文件或报告书。这类文件或报告书的封面惯用黄颜色,故称黄皮书。这里的 yellow 与淫秽色情无关,
