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Partial Order in Potts Models on the Generalized Decorated Square Lattice

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Chinese Physics Letters 2013年第7期30卷 152-156页

作者： QIN Ming-Pu CHEN Jing CHEN Qiao-Ni XIE Zhi-Yuan KONG Xin ZHAO Hui-Hai Bruce Normand xiang tao Institute of Physics Chinese Academy of SciencesBeijing 100190 Department of Chemistry Frick LaboratoryPrinceton UniversityPrincetonNew Jersey 08544USA Department of Physics Renmin University of ChinaBeijing 100872

We explore the Potts model on the generalized decorated square lattice,with both nearest(J1)and next-nearest(J2)neighbor *** the tensor renormalization-group method augmented by higher order singular value decompositions,we calculate the spontaneous magnetization of the Potts model with q=2,3,and *** results for q=2 allow us to benchmark our numerics using the exact *** q=3,we find a highly degenerate ground state with partial order on a single sublattice,but with vanishing entropy per site,and we obtain the phase diagram as a function of the ratio J2/*** is no finite-temperature transition for the q=4 case when J1=J2,whereas the magnetic susceptibility diverges as the temperature goes to zero,showing that the model is critical at T=0.

关键词： solution. degenerate magnetization

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无线广播系统的多级传输方案

通信学报 2009年第7期30卷 106-110,117页

作者：孙向涛龚克清华大学电子工程系微波与数字通信技术国家重点实验室北京100084 天津大学电子信息工程学院天津300072

为了充分利用信道的传输能力并满足不同用户和不同接收设备的要求,提出了一种多级传输的方案。该方案使用多级编码和多分辨率调制技术把广播数据分成多个优先级,为不同优先级的数据提供不同的差错保护。解码时采用多级译码的方法,使得... 详细信息

为了充分利用信道的传输能力并满足不同用户和不同接收设备的要求,提出了一种多级传输的方案。该方案使用多级编码和多分辨率调制技术把广播数据分成多个优先级,为不同优先级的数据提供不同的差错保护。解码时采用多级译码的方法,使得用户可以根据自身的信道质量或者接收设备的能力,获得不同的数据传输率。仿真结果表明,该方案在AWGN和多径信道下都具有很好的性能。

关键词：多级编码调制集分割多级译码不同的差错保护低密度奇偶校验码

A Novel Gas Classification Method Based on The Improved GasNet

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A Novel Gas Classification Method Based on The Improved GasN...

An ELISA Based on a Truncated Soluble ORF2 Protein for the Detection of PCV2 Antibodies in Domestic Pigs

第43届中国控制会议

作者： Xiaolin Qin Lei Cheng xiang tao Engineering Research Center for Metallurgical Automation and Measurement Technology of Ministry of Education Institute of Robotics and Intelligent Systems Wuhan University of Science and Technology School of Information Science and Engineering Wuhan University of Science and Technology

Accurately and promptly identifying harmful gases in the environment can effectively prevent many accidents. Most existing pattern recognition methods are focused on addressing gas classification problems in static scenarios, but the real world is a dynamic and changing environment. Therefore, researching gas classification in continuous learning scenarios will better meet the needs of suddenly emerging gas classification tasks in real-world environments. To address this issue, an incremental learning model was introduced into gas classification, and an improved deep convolutional network was proposed for gas image feature extraction. The proposed model and other baseline methods experimented on an open-source gas dataset. The proposed model reduces knowledge loss due to catastrophic forgetting and effectively classifies the 10 gas samples in the dataset in continuous learning scenarios compared to non-incremental methods. It outperforms other baseline incremental methods by optimizing the network's shortcut connections, making the feature extraction network easier to train and improving gas classification performance. In dynamic learning scenarios, the proposed model achieved a classification accuracy of 86.30% for 10 gas *** experimental results demonstrate that the proposed method effectively mitigates catastrophic forgetting interference and completes gas classification tasks in continuous learning scenarios.

关键词： Gas classification Incremental learning Shortcut connection Catastrophic forgetting

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Virologica Sinica 2010年第3期25卷 191-198页

作者： Shuang-hui YIN Shun-li YANG Hong TIAN Jin-yan WU You-jun SHANG Xue-peng CAI xiang-tao LIU Lanzhou Veterinary Research Institute Chinese Academy of Agricultural Sciences State Key Laboratory of Veterinary Etiological Biology Key Laboratory of Animal Virology of Ministry of Agriculture Lanzhou 730046China

Postweaning multisystemic wasting syndrome (PMWS) is an important swine disease that is closely associated with porcine circovirus type 2 (PCV2). The capsid protein (Cap protein) is a major structural protein that has at least three immunoreactive regions, and it can be a suitable candidate antigen for detecting the specific antibodies of a PCV2 infection. In the present study, an indirect enzyme-linked immunosorbent assay (TcELISA) based on a truncated soluble Cap protein produced in Escherichia coli (***) was established and validated for the diagnostic PCV2 antibodies in swine. The TcELISA was validated by comparison with an indirect immunofluorescence assay (IIFA). The diagnostic sensitivity (DSN), specificity (DSP), and accuracy of the TcELISA were 88.6%, 90.7% and 89.4%, respectively. The agreement rate was 89.38% between results obtained with TcELISA and IIFA on 113 field sera. A cross-reactivity assay showed that the method was PCV2-specific by comparison with other sera of viral disease. Therefore ,the TcELISA will be helpful for the development of a reliable serology diagnostic test for large scale detection of PCV2 antibodies and for the evaluation of vaccine against PCV2 in swine.

关键词： Porcine circovirus type 2 (PCV2) Soluble ORF2 protein ELISA Antibody detection

Microbleeds in fronto-subcortical circuits are predictive of dementia conversion in patients with vascular cognitive impairment but no dementia

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Neural Regeneration Research 2018年第11期13卷 1913-1918页

作者： Yang-Kun Chen Wei-Min Xiao Wei Li Zhuo-Xin Ni Yong-Lin Liu Li Xu Jian-Feng Qu Chee H.Ng Yu-tao xiang Department of Neurology Dongguan People’s Hospital(Affiliated Dongguan HospitalSouth Medical University) Faculty of Neurology Guangdong Medical University Department of Psychiatry University of Melbourne Faculty of Health Sciences University of Macao

Cerebral small vessel disease（CSVD） is a common etiology of vascular cognitive impairment with no dementia（V-CIND）. Studies have revealed that cerebral microbleeds（CMBs）, a feature of CSVD, contribute to cognitive impairment. However, the association between CMBs and dementia conversion in individuals with V-CIND is still unclear. Here, we analyzed the predictive role of CMBs in the conversion from V-CIND to dementia in CSVD patients. We recruited and prospectively assessed 85 patients with CSVD and V-CIND. V-CIND was evaluated using a series of comprehensive neuropsychological scales, including the Chinese version of the Montreal Cognitive Assessment and the Clinical Dementia Rating. MRI assessments were used to quantify lacunar infarcts, white matter hyperintensities, CMBs, and medial temporal lobe atrophy. Eighty-two of the 85 patients completed the assessment for dementia conversion at a 1-year follow-up assessment. Multivariate logistic regression analyses were conducted to examine independent clinical and MRI variables associated with dementia conversion. Twenty-four patients（29.3%） had converted to dementia at the 1-year follow-up, and these individuals had significantly more CMBs in the fronto-subcortical circuits. Multivariate logistic regression analyses revealed that the patients with CMBs in the fronto-subcortical circuits（odds ratio = 4.4; 95% confidence interval： 1.602-12.081, P = 0.004） and 5 or more CMBs overall（odds ratio = 17.6, 95% confidence interval： 3.23-95.84, P = 0.001） had a significantly increased risk of dementia at the 1-year follow-up. These findings indicate that CMBs in the fronto-subcortical circuits may be predictive of dementia conversion in CSVD patients with V-CIND, and thus extend the clinical significance of CMBs.

关键词： cerebrovascular disease stroke cerebral microbleeds cognitive impairment fronto-subcortical circuits small vessel disease whitematter hyperintensities lacunar infarct magnetic resonance imaging subcortical ischemic vascular disease

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用光纤陀螺测量航天器结构体高频微小角振动

中国惯性技术学报 2013年第5期21卷 646-650页

作者：孟祥涛王巍向政中国航天电子技术研究院北京100094

航天器在轨运行过程中,由于内部多种活动部件的存在,会干扰航天器的结构体,其中动量轮的动不平衡和静不平衡是其主要的干扰源。当动量轮转子高速旋转时会使其与航天器结构体之间产生复杂的耦合振动,造成航天器结构体产生微小角振动输出... 详细信息

航天器在轨运行过程中,由于内部多种活动部件的存在,会干扰航天器的结构体,其中动量轮的动不平衡和静不平衡是其主要的干扰源。当动量轮转子高速旋转时会使其与航天器结构体之间产生复杂的耦合振动,造成航天器结构体产生微小角振动输出。针对动量轮的设计特点,结合在航天器上的安装方式,分析了航天器上的微小角振动环境,根据光纤陀螺的宽频特性,提出采用光纤陀螺实现航天器结构体微小角振动测量的方法,开展了整星试验。通过分析整星的实测数据表明,光纤陀螺可准确测量航天器结构体的微小角振动,频率测量误差小于0.01%,该测量信息可用于图像的动态补偿等领域。

关键词：动量轮耦合振动光纤陀螺动态补偿

A short-term study of corneal collagen cross-linking with hypo-osmolar riboflavin solution in keratoconic corneas

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International Journal of Ophthalmology(English edition) 2015年第1期8卷 94-97页

作者： Shao-Feng Gu Zhao-Shan Fan Li-Hua Wang xiang-Chen tao Yong Zhang Chun-Qin Wang Ya Wang Guo-Ying Mu Department of Ophthalmology Shandong Provincial Hospital Affiliated to Shandong University

AIM: To report the 3mo outcomes of collagen crosslinking(CXL) with a hypo-osmolar riboflavin in thin corneas with the thinnest thickness less than 400 μm without ***: Eight eyes in 6 patients with age 26.2±4.8y were included in the study. All patients underwent CXL using a hypo-osmolar riboflavin solution after its de-epithelization. Best corrected visual acuity, manifest refraction, the thinnest corneal thickness, and endothelial cell density were evaluated before and 3mo after the ***: The mean thinnest thickness of the cornea was 408.5 ±29.0 μm before treatment and reduced to369.8 ±24.8 μm after the removal of epithelium. With the application of the hypo-osmolar riboflavin solution, the thickness increased to 445.0 ±26.5 μm before CXL and recover to 412.5 ±22.7 μm at 3mo after treatment, P =0.659). Before surgery, the mean K-value of the apex of the keratoconus corneas was 57.6 ±4.0 diopters, and slightly decreased(54.7±4.9 diopters) after surgery(P =0.085). Mean best-corrected visual acuity was 0.55 ±0.23 logarithm of the minimal angle of resolution, and increased to 0.53±0.26 logarithm after surgery(P =0.879).The endothelial cell density was 2706.4 ±201.6 cells/mm2 before treatment, and slightly decreased( 2641. 2 ±218.2 cells/mm2) at last fellow up(P =0.002).CONCLUSION: Corneal collagen cross-linking with a hypo-osmolar riboflavin in thin corneas seems to be a promising treatment. Further study should be done to evaluate the safety and efficiency of CXL in thin corneas for the long-term.

关键词： corneal collagen cross-linking keratoconus hypo-osmolar riboflavin thin corneas

Generalized plasticity model considering grain crushing and anisotropy for rockfill materials

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Journal of Central South University 2022年第4期29卷 1274-1288页

作者： ZHANG xiang-tao GAO Yi-zhao YU Yu-zhen WANG xiang-nan ZHAN Zheng-gang State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing 100084China Power China Guiyang Engineering Co. Ltd.Guiyang 550081China

Rockfill materials have been widely used in the construction of rockfill dam,railway and highway subgrade due to its high filling density,good compaction performance,strong water permeability,small settlement deformation and high bearing capacity.A reasonable constitutive model for rockfill materials is very important for engineering computation and analysis,and has a great development *** on the crushing stress and spatial mobilized plane(SMP),a state parameter that can comprehensively reflect the anisotropy and grain crushing is *** state parameter is used to improve the MPZ model(a modifed ZienkiewiczⅢmodel),so that a generalized plastic model is constructed to describe the stress and deformation characteristics of rockfill materials in *** validity of the developed model is verified by a series of conventional triaxial tests with different inclination angles of the compaction *** variation trend of the constructed anisotropy indexωcan reflect the non monotonic variation of the deformation and strength of rockfill with the direction angle of large principal stress,so the model can reflect the obvious difference caused by the initial anisotropy of rockfill on the mechanical properties.

关键词： constitutive model anisotropy grain crushing rockfill materials

Crossover from 2-dimensional to 3-dimensional aggregations of clusters on square lattice substrates

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Chinese Physics B 2015年第11期24卷 544-548页

作者：程毅祝宇红潘启发杨波陶向明叶高翔 Department of Physics Zhejiang University Department of Physics Hangzhou Normal University

A Monte Carlo study on the crossover from 2-dimensional to 3-dimensional aggregations of clusters is presented. Based on the traditional cluster-cluster aggregation （CCA） simulation, a modified growth model is proposed. The clusters （including single particles and their aggregates） diffuse with diffusion step length 1 （1≤l≤7） and aggregate on a square lattice substrate. If the number of particles contained in a cluster is larger than a critical size Sc, the particles at the edge of the cluster have a possibility to jump onto the upper layer, which results in the crossover from 2-dimensional to 3-dimensional aggregations. Our simulation results are in good agreement with the experimental findings.

关键词： simulation cluster aggregation crossover