检索结果-南通市图书馆

The neutrino energy loss by electron capture of nuclides ^(55)Co and ^(56)Ni in explosive stellar environments

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2013年第1期13卷 99-103页

作者： jing-jing Liu College of Science and Technology Qiongzhou University

Using the Shell-Model Monte Carlo method and the Random Phase Approximation theory, we carry out an estimation of neutrino energy loss （NEL） for 55Co and 56Ni by electron capture. We find that the NEL rates increase greatly at some typical stellar conditions, and can even exceed five orders of magnitude （e.g. T9 = 38.5, Ye = 0.42 for 56Ni）. On the other hand, the error factor C shows that the fit is fairly good for two results at higher density and lower temperature, and the max- imum error is - 1.2%. However, the maximum error is ,- 55.60% （e.g. T9 = 18.5, Ye = 0.45） at lower density and higher temperature.

关键词： physical data and processes: neutrinos nuclear reactions -- stars: super-novae -- stars: evolution

深板层角膜移植与穿透性角膜移植治疗基质角膜营养不良预后的比较

在线全文

学校读者我要写书评

暂无评论

中国组织工程研究 2025年第8期29卷 1626-1633页

作者：静如意陈颖欣曹蕾北部战区总医院辽宁省沈阳市110000

背景:基质角膜营养不良的传统手术治疗方式为穿透性角膜移植,近年来越来越多的医生开始考虑使用深板层角膜移植治疗基质角膜营养不良。目前国内对比穿透性角膜移植和深板层角膜移植治疗基质角膜营养不良的研究少有报道。目的:比较深板... 详细信息

背景:基质角膜营养不良的传统手术治疗方式为穿透性角膜移植,近年来越来越多的医生开始考虑使用深板层角膜移植治疗基质角膜营养不良。目前国内对比穿透性角膜移植和深板层角膜移植治疗基质角膜营养不良的研究少有报道。目的:比较深板层角膜移植和穿透性角膜移植治疗基质角膜营养不良的疗效。方法:选择2000年1月至2018年1月北部战区总医院收治的基质角膜营养不良患者57例(57眼),男18例,女39例,平均年龄(52.9±20.0)岁,按照手术治疗方式分为深板层角膜移植组(n=21)、穿性角膜移植组(n=36),术后随访观察最佳矫正视力、角膜内皮细胞密度、角膜植片透明度、术中及术后并发症、原病复发情况。结果与结论:①两组患者术后1,3,6,12个月的视力均高于术前(P0.05);随着术后时间的延长,两组患者角膜内皮细胞密度逐渐降低,穿透性角膜移植组患者术后6,12个月的角膜内皮细胞密度年丢失率均高于深板层角膜移植组(P0.05);②深板层角膜移植组有6例出现并发症,穿透性角膜移植组有14例出现并发症,57例患者术后12个月内均无复发,两组患者术后5年的复发率比较差异无显著性意义(P>0.05),穿透性角膜移植组和深板层角膜移植组术后5年的移植物存活率分别为83%和86%,组间比较差异无显著性意义(P>0.05);③结果表明,基质角膜营养不良的治疗可考虑使用深板层角膜移植替代一部分穿透性角膜移植。

关键词：穿透性角膜移植深板层角膜移植基质角膜营养不良最佳矫正视力角膜植片透明度角膜内皮细胞密度并发症复发

Ligation of CD180 inhibits IFN-α signaling in a Lyn-PI3K-BTK-dependent manner in B cells

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2017年第2期14卷 192-202页

作者： Ming You Guanjun Dong Fanlin Li Feiya Ma jing Ren Yujun Xu Huimin Yue ruijing Tang Deshan Ren Yayi Hou The State Key Laboratory of Pharmaceutical Biotechnology Division of Immunology Medical School Nanjing University Nanjing 210093 People's Republic of China Jiangsu Key Laboratory of Molecular Medicine Medical School Nanjing University Nanjing 210093 People's Republic of China oth Ming You and Guanjun Dong contributed equally to this work

A hallmark of systemic lupus erythematosus （SLE） is the consistent production of various auto-antibodies by auto-reactive B cells. Interferon-α（IFN-α） signaling is highly activated in SLE B cells and plays a vital role in the antibody response by B cells. Previous studies have shown that CD180-negative B cells, which are dramatically increased in SLE patients, are responsible for the production of auto-antibodies. However, the association between CD180 and IFN-αsignaling remains unknown. In the present study, we explored the effect of CD180 on regulating the activation of IFN-α signaling in B cells. We found that the number of CD180-negative B cells was increased in MRIJMp-Fas（Ipr/Ipr） lupus-prone mice compared with wild-type mice. Phenotypic analysis showed that CD180-negative B cells comprised CD138＋ plasmablast/plasma cells and GL-7＋ germinal center （GC） B cells. Notably, ligation of CD180 significantly inhibited the I FN-α-induced phosphorylation of signal transducer and activator of transcription 2 （STAT-2） and expression of IFN-stimulated genes （ISGs） in a Lyn-PI3K-BTK-dependent manner in vitro. Moreover, ligation of CD180 could also inhibit IFN-α-induced ISG expression in B cells in vivo. Furthermore, the Toll-like receptor 7 and Toll-like receptor 9 signaling pathways could significantly downregulate CD180 expression and modulate the inhibitory effect of CD180 signaling on the activation of I FN-a signaling. Collectively, our results highlight the close association between the increased proportion of CD180-negative B cells and the activation of IFN-α signaling in SLE. Our data provide molecular insight into the mechanism of IFN-α signaling activation in SLE B cells and a potential therapeutic approach for SLE treatment.

关键词： B cells CD180 IFN-α SLE

An efficient quantum proactive incremental learning algorithm

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 49-57页

作者： Lingxiao Li jing Li Yanqi Song Sujuan Qin Qiaoyan Wen Fei Gao State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications School of Cyberspace Security Beijing University of Posts and Telecommunications

In scenarios where a large amount of data needs to be learned, incremental learning can make full use of old knowledge, significantly reduce the computational cost of the overall learning process, and maintain high performance. In this paper, taking the MaxCut problem as our example, we introduce the idea of incremental learning into quantum computing, and propose a Quantum Proactive Incremental Learning algorithm(QPIL). Instead of a one-off training of quantum circuit, QPIL contains a multi-phase training on gradually-increased subgraphs of all vertices, proactively reducing large-scale problems to smaller ones to solve in steps, providing an efficient solution for MaxCut. Specifically, some vertices and corresponding edges are randomly selected for training to obtain optimized parameters of the quantum circuit at first. Then, in each incremental phase, the remaining vertices and corresponding edges are gradually added and the parameters obtained from the previous phase are reused in the parameter initialization of the current phase. We perform experiments on 120 different small-scale graphs, and it shows that QPIL performs superior to prevalent quantum and classical baselines in terms of approximation ratio(AR), time cost, anti-forgetting, and solving stability. In particular, QPIL's AR surpasses 20% of mainstream quantum baselines, and the time cost is less than 1/5 of them. The idea of QPIL is expected to inspire efficient and high-quality solutions in large-scale Max Cut and other combinatorial optimization problems.

关键词：

The optical nonreciprocal response based on a four-mode optomechanical system

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第3期29卷 245-250页

作者： jing Wang College of Physics Tonghua Normal UniversityTonghua 134000China

We propose a scheme for realizing the optical nonreciprocal response based a four-mode optomechanical system,consisting of two charged mechanical modes and two linearly coupled optical modes. Two charged mechanical modes are coupled by Coulomb interaction, and two optical modes are coupled to one of mechanical modes by radiation pressure. We numerically evaluate the transmission probability of the probe field to obtain the optimum optical nonreciprocal response parameters. Also, we show that the optical nonreciprocal response is caused by the quantum interference between the optomechanical couplings and the linearly coupled interaction that breaks the time-reversal symmetry.

关键词： optical nonreciprocal response optomechanical system phase difference

Ground-state cooling based on a three-cavity optomechanical system in the unresolved-sideband regime

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第2期30卷 298-303页

作者： jing Wang College of Physics Tonghua Normal UniversityTonghua 134000China

In the unresolved sideband regime,we propose a scheme for cooling mechanical resonator close to its ground state in a three-cavity optomechanical system,where the auxiliary cavities are indirectly connected with the mechanical resonator through standard optomechanical *** standard optomechanical subsystem is driven by a strong pump laser *** the help of the auxiliary cavities,the heating process is suppressed and the cooling process of the mechanical resonator is *** importantly,the average phonon number is much less than 1 in a larger *** means that the mechanical resonator can be cooled down to its ground *** these interesting features will significantly promote the physical realization of quantum effects in multi-cavity optomechanical systems.

关键词： ground-state cooling three-cavity optomechanical system unresolved sideband regime

Multi-year monitoring of paddy rice planting area in Northeast China using MODIS time series data

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第10期14卷 934-946页

作者： jing-jing SHI jing-feng HUANG Feng ZHANG Institute of Agricultural Remote Sensing and Information Application Zhejiang University Key Laboratory of Agricultural Remote Sensing and Information System of Zhejiang Province Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health Zhejiang University

e The objective of this study was to investigate the tempo-spatial distribution of paddy rice in Northeast China using moderate resolution imaging spectroradiometer （MODIS） data. We developed an algorithm for detection and estimation of the transplanting and flooding periods of paddy rice with a combination of enhanced vegetation index （EVI） and land surface water index with a central wavelength at 2130 nm （LSW12130）. In two intensive sites in Northeast China, fine resolution satellite imagery was used to validate the performance of the algorithm at pixel and 3x3 pixel window levels, respectively. The commission and omission errors in both of the intensive sites were approximately less than 20%. Based on the algorithm, annual distribution of paddy rice in Northeast China from 2001 to 2009 was mapped and analyzed. The results demonstrated that the MODIS-derived area was highly correlated with published agricultural statistical data with a coefficient of determination （R^2） value of 0.847. It also revealed a sharp decline in 2003, especially in the Sanjiang Plain located in the northeast of Heilongjiang Province, due to the oversupply and price decline of rice in 2002. These results suggest that the approaches are available for accurate and reliable monitoring of rice cultivated areas and variation on a large scale.

关键词： Paddy rice Moderate resolution imaging spectroradiometer(MODIS) Northeast China Enhanced vegetation index Land surface water index

Reducibility for Schrodinger Operator with Finite Smooth and Time-Quasi-periodic Potential

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2020年第3期41卷 419-440页

作者： jing LI School of Mathematics Shandong UniversityJi5nan 250100China School of Mathematics and Statistics Shandong UniversityWeihai 264209ShandongChina

In this paper, the author establishes a reduction theorem for linear Schr?dinger equation with finite smooth and time-quasi-periodic potential subject to Dirichlet boundary condition by means of KAM(Kolmogorov-Arnold-Moser) technique. Moreover, it is proved that the corresponding Schr?dinger operator possesses the property of pure point spectra and zero Lyapunov exponent.

关键词： Reducibility Quasi-periodic Schrodinger operator KAM theory Finite smooth potential Lyapunov exponent Pure-Point spectrum

CosmicGrowth Simulations——Cosmological simulations for structure growth studies

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2019年第1期62卷 90-94页

作者： YiPeng jing Department of Astronomy Shanghai Jiao Tong University IFSA Collaborative Innovation Center Shanghai Jiao Tong University Tsung-Dao Lee Institute Shanghai Jiao Tong University

I present a large set of high resolution simulations, called CosmicGrowth Simulations, which were generated with either 8.6 billion or 29 billion particles. As for the nominal cosmological model that can match nearly all observations on cosmological scales, I have adopted a flat Cold Dark Matter(CDM) model with a cosmological constant Λ(ΛCDM). The model parameters have been taken either from the latest result of the WMAP satellite(WMAP ΛCDM) or from the first year's result of the Planck satellite(Planck ΛCDM). Six simulations are produced in the ΛCDM models with two in the Planck model and the others in the WMAP model. In order for studying the non-linear evolution of the clustering, four simulations were also produced with 8.6 billion particles for the scale-free models of an initial power spectrum P(k) ∝ k^n with n = 0,-1,-1.5 or-2.0. Furthermore, two radical CDM models(XCDM) are simulated with 8.6 billion particles each. Since the XCDM have some of the model parameters distinct from those of the ΛCDM models, they must be unable to match the observations, but are very useful for studying how the clustering properties depend on the model parameters. The Friends-of-Friends(FoF) halos were identified for each snapshot and subhalos were produced by the Hierarchical Branch Tracing(HBT) algorithm. These simulations form a powerful database to study the growth and evolution of the cosmic structures both in theory and in observation.

关键词： galaxy formation structure formation in the Universe cosmology