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Mapping Analysis of Solar Radio Burst at 17 GHz on 1992 October 27

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Chinese Physics Letters 2000年第8期17卷 621-622页

作者： yu xing-feng YAO Jin-xing Purple Mountain Observatory Chinese Academy of SciencesNanjing 210008 National Astronomical Observatory Chinese Academy of Sciences

The contour maps at 17 GHz on the 1992 October 27 solar burst are *** a nonthermal inhomogeneous model of the radio source,the variations of calculated source size with time are basically consistent with the observation of *** variations of calculated brightness temperature with a distanceρdisplaced from the project center are in better agreement with the observation of map at 01:45:29:889 *** calculation shows that the characterizing magnetic field gradientαB at the peak of 17 GHz is about 2,magnetic strength B is about 737G with the magnetic field Bm of the core being 2000 *** in order to measure the coronal magnetic field accurately,it is necessary to obtain radio-imaging data at more frequencies.

关键词： strength magnetic Solar

The RNAome landscape of tomato during arbuscular mycorrhizal symbiosis reveals an evolving RNA layer symbiotic regulatory network

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Plant Communications 2023年第1期4卷 148-166页

作者： Zhen Zeng Yang Liu xing-yu feng Sai-Xi Li xing-Mei Jiang Jian-Qun Chen Zhu-Qing Shao State Key Laboratory of Pharmaceutical Biotechnology School of Life SciencesNanjing UniversityNanjing 210023China

Arbuscular mycorrhizal symbiosis(AMS)is an ancient plant-fungus relationship that is widely distributed in terrestrial *** formation of symbiotic structures and bidirectional nutrient exchange requires the regulation of numerous ***,the landscape of RNAome during plant AMS involving different types of regulatory RNA is poorly *** this study,a combinatorial strategy utilizing multiple sequencing approaches was used to decipher the landscape of RNAome in tomato,an emerging AMS *** annotation of the tomato genome was improved by a multiple-platform sequencing strategy.A total of 3,174 protein-coding genes were upregulated during AMS,42%of which were alternatively ***-transcriptome analysis revealed that genes from 24 orthogroups were consistently induced by AMS in eight phylogenetically distant *** additional orthogroups were specifically induced by AMS in all surveyed dicot AMS host ***,these orthogroups were absent or not induced in monocots and/or non-AMS hosts,suggesting a continuously evolving AMS-responsive network in addition to a conserved core regulatory ***,we detected 587 lncRNAs,ten miRNAs,and 146 circRNAs that responded to AMS,which were incorporated to establish a tomato AMSresponsive,competing RNA-responsive endogenous RNA(ceRNA)***,a tomato symbiotic transcriptome database(TSTD,https://***/TSTD)was constructed to serve as a resource for deep deciphering of the AMS regulatory *** results help elucidate the reconfiguration of the tomato RNAome during AMS and suggest a sophisticated and evolving RNA layer responsive network during AMS processes.

关键词： tomato RNAome landscape arbuscular mycorrhizal symbiosis evolution ceRNA network

Sleep quality and its impact on glycaemic control in patients with type 2 diabetes mellitus

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International Journal of Nursing Sciences 2014年第3期1卷 260-265页

作者： Bing-Qian Zhu Xiao-Mei Li Dan Wang xing-feng yu School of Nursing Xi'an Jiaotong UniversityXi'anChina

Purpose:To investigate the sleep quality of patients with type 2 diabetes(T2D)and its impact on glycaemic ***:Using a convenience sampling method,220 patients with T2D were *** Pittsburgh Sleep Quality Index(PSQI)was used to evaluate the sleep quality with threshold at PSQI*** glycosylated haemoglobin A1c(HbA1c)test was used to measure the glycaemic control with threshold at HbA1c<7%.Results:The PSQI score was 8.30±*** sleep disorder incidence rate was 47.1%.Patients with HbA1c7%had significantly lower PSQI global and factor scores(p<0.01)versus the control *** latency,sleep disturbance,and daytime dysfunction were the risk factors for poor glycaemic ***:Patients with T2D have high sleep disorder rate negatively impacting glycaemic *** care providers should pay close attention to the sleep quality of T2D patients,and provide them with appropriate educational material.

关键词： Blood glucose Diabetes mellitus,type 2 Sleep quality

A novel nomogram individually predicting disease-specific survival after D2 gastrectomy for advanced gastric cancer

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Cancer Communications 2018年第1期38卷 254-262页

作者： Wei Wang Zhe Sun Jing-yu Deng Xiao-Long Qi xing-yu feng Cheng Fang xing-Hua Ma Zhen-Ning Wang Han Liang Hui-Mian Xu Zhi-Wei Zhou Department of Gastric Surgery Sun Yat-sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer Medicine651 Dongfeng East RoadGuangzhou 510060GuangdongP.R.China Department of Surgical Oncology The First Affiliated Hospital of China Medical UniversityShenyang 110000LiaoningP.R.China Department of Gastric Cancer Surgery Tianjin Medical University Cancer HospitalTianjin 300000P.R.China Department of General Surgery Nanfang HospitalSouthern Medical UniversityGuangzhou 510515GuangdongP.R.China Department of Gastroenterology Surgery Guangdong General HospitalGuangzhou 510030GuangdongP.R.China Department of Preventive Medicine School of Public HealthSun Yat-sen UniversityGuangzhou 510275GuangdongP.R.China

Background:Few studies have shown nomograms that may predict disease-specific survival(DSS)probability after curative D2 gastrectomy for advanced gastric cancer(AGC),particularly among Chinese *** study sought to develop an elaborative nomogram that predicts long-term DSS for AGC in Chinese ***:A retrospective study was conducted on 6753 AGC patients undergoing D2 gastrectomy between January 1,2000 and December 31,2012 from three large medical hospitals in *** assigned patients from Sun Yat-sen University Cancer Center to the training set,and patients from the First Affiliated Hospital of China Medical University and Tianjin Medical University Cancer Hospital to two separate external validation sets.A multivariate survival analysis was performed using Cox proportional hazards regression model in a training set,and a nomogram was ***’s C-index was used to evaluate discrimination and calibration plots were used to validate similarities between survival probabilities predicted by the nomogram model and actual survival rates in two validation ***:The multivariate Cox regression model identified age,tumor size,location,Lauren classification,lymphatic/venous invasion,depth of invasion,and metastatic lymph node ratio as covariates associated with *** the training set,the nomogram exhibited superior discrimination power compared with the 8th American Joint Com-mittee on Cancer TNM classification(Harrell’s C-index,0.82 vs.0.74;P<0.001).In two validation sets,the nomogram’s discrimination power was also excellent relative to TNM classification(C-index,0.83 vs.0.75 and 0.81 vs.0.74,respec-tively;P<0.001 for both).After calibration,the nomogram produced survival predictions that corresponded closely with actual survival ***:The established nomogram was able to predict 3-,5-,and 10-year DSS probabilities for AGC *** revealed that this nomogram exhibited excellent discrimination and calibrat

关键词： Advanced gastric cancer Disease-specific survival Prognostic nomogram

An Electron Density Model above the Sunspot from a Mapping of NOAA 7260 at 17 GHz

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Chinese Journal of Astronomy and Astrophysics 2002年第3期2卷 287-292页

作者： xing－fengyu Jin－xingYao NationalAstronomicalObservatories ChineseAcademyofSciencesBeijing100012 PurpleMountainObservatory ChineseAcademyofSciencesNanjing210008

The brightness temperature distribution of microwave emission in a solar active region generally shows a ring structure, with a dip at the centre. However, no dip was found in the Nobeyama Radioheliograph left handed circular polarization (LCP) image on 1992 August 18; instead, there was a peak. This is a completely LCP source with zero right-handed circular polarization (RCP). We examine this structure in terms of the joint effect of gyroresonance and bremsstrahlung mechanism with a raised electron density above the central part of the sunspot, and the commonly assumed temperature and vertical dipole magnetic field models. The raised electron density is found to be 1.4 × 1011 cm-3 at the chromosphere base.

关键词： Sun: activity - sunspots - Sun: radio radiation - Sun: chromosphere

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李级数算法和显式辛算法的相位分析

计算力学学报 2009年第2期26卷 167-171页

作者：邢誉峰冯伟北京航空航天大学固体力学研究所北京100083

以线性可分Hamilton动力学系统为例,研究了李级数算法和显式辛算法的相位精度,研究了李级数算法的保辛精度及其保辛精度的提高方法;指出了显式辛算法相位精度与算法阶次的不协调性,即辛算法的阶次高并不意味着其相位精度也高,李级数算... 详细信息

以线性可分Hamilton动力学系统为例,研究了李级数算法和显式辛算法的相位精度,研究了李级数算法的保辛精度及其保辛精度的提高方法;指出了显式辛算法相位精度与算法阶次的不协调性,即辛算法的阶次高并不意味着其相位精度也高,李级数算法不存在这种问题,指出了一个算法的相位可能超前也可能滞后。分析结果表明三阶显式辛算法具有比较高的相位精度。

关键词：李级数法显式辛算法相位幅值

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李级数法与Runge-Kutta法

振动工程学报 2007年第5期20卷 519-522页

作者：邢誉峰冯伟北京航空航天大学航空科学与工程学院固体力学研究所北京100083

对线性自治系统证明了二阶、四阶李级数法分别与Runge-Kutta法中二级二阶改进Euler法和四级四阶经典R-K法的一致性;说明了李级数法和Taylor级数法的一致性,但两者计算导数的方法不同,导致不同的应用价值。分析了李级数法在求解非线性问... 详细信息

对线性自治系统证明了二阶、四阶李级数法分别与Runge-Kutta法中二级二阶改进Euler法和四级四阶经典R-K法的一致性;说明了李级数法和Taylor级数法的一致性,但两者计算导数的方法不同,导致不同的应用价值。分析了李级数法在求解非线性问题时的优越性。

关键词：李级数法 Runge—Kutta法 Taylor级数法

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微分求积时间单元方法

振动工程学报 2012年第1期25卷 84-89页

作者：郭静邢誉峰北京航空航天大学固体力学研究所北京100191

基于微分求积法则,提出了一种求解动力学常微分方程的高效高精度微分求积时间单元方法(DQTEM)。给出了DQTEM施加初始位移和初始速度的方法,其结果相当于构造了C1时间单元。与递推格式的直接积分方法不同,对于考虑的时间域通常只需用一... 详细信息

基于微分求积法则,提出了一种求解动力学常微分方程的高效高精度微分求积时间单元方法(DQTEM)。给出了DQTEM施加初始位移和初始速度的方法,其结果相当于构造了C1时间单元。与递推格式的直接积分方法不同,对于考虑的时间域通常只需用一个微分求积时间单元。与RK法和Newmark法相比,用少量时间结点的DQTEM结果就与精确解吻合。稳定性分析表明,DQTEM通常是条件稳定的。

关键词：微分求积法则直接积分方法时间单元相位误差数值耗散

Performance of risk stratification systems for gastrointestinal stromal tumors: A multicenter study

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World Journal of Gastroenterology 2019年第10期25卷 1238-1247页

作者： Tao Chen Liang-Ying Ye xing-yu feng Hai-Bo Qiu Peng Zhang Yi-Xin Luo Li-Yi yuan Xin-Hua Chen Yan-feng Hu Hao Liu Yong Li Kai-Xiong Tao Jiang yu Guo-Xin Li Department of General Surgery Nanfang HospitalSouthern Medical University Department of Gastroenterology Nanfang HospitalSouthern Medical University Department of General Surgery Guangdong General HospitalGuangdong Academy of Medical Sciences Department of Gastric Surgery Sun Yat-sen University Cancer CenterSun Yatsen University Department of General Surgery Wuhan Union HospitalHuazhong University of Science and Technology

BACKGROUND Gastrointestinal stromal tumors(GISTs) are the most common mesenchymal tumor type in the gastrointestinal system. Presently, various classification systems to prognosticate GISTs have been *** To evaluate the application value of four different risk stratification systems for *** Patients who were diagnosed with GISTs and underwent surgical resection at four hospitals from 1998 to 2015 were identified from a database. Risk of recurrence was stratified by the modified National Institute of Health(NIH)criteria, the Armed Forces Institute of Pathology(AFIP) criteria, the Memorial Sloan Kettering Cancer Center(MSKCC) prognostic nomogram, and the contour maps. Receiver operating characteristic(ROC) curves were established to compare the four abovementioned risk stratification systems based on the area under the curve(AUC).RESULTS A total of 1303 patients were included in the study. The mean age of the patients was 55.77 ± 13.70 yr; 52.3% of the patients were male. The mean follow-up period was 64.91 ± 35.79 mo. Approximately 67.0% the tumors were located in the stomach, and 59.5% were smaller than 5 cm; 67.3% of the patients had a mitotic count ≤ 5/50 high-power fields(HPFs). Thirty-four tumors ruptured before and during surgery. Univariate analysis demonstrated that tumor size > 5 cm(P 5/50 HPFs(P < 0.05), non-gastric location(P < 0.05), and tumor rupture(P < 0.05) were significantly associated with increased recurrence rates. According to the ROC curve, the AFIP criteria showed the largest AUC(0.754).CONCLUSION According to our data, the AFIP criteria were associated with a larger AUC than the NIH modified criteria, the MSKCC nomogram, and the contour maps, which might indicate that the AFIP criteria have better accuracy to support therapeutic decision-making for patients with GISTs.

关键词： Gastrointestinal stromal tumors Risk stratification Prognosis Modified National Institute of Health criteria Armed Forces Institute of Pathology criteria Memorial Sloan Kettering Cancer Center prognostic nomogram Contour maps Gastrointestinal tumors