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Optimization of the OCO-2 Cloud Screening Algorithm and Evaluation against MODIS and TCCON Measurements over Land Surfaces in Europe and Japan

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Advances in Atmospheric Sciences 2020年第4期37卷 387-398页

作者： Sijie CHEN Shuaibo WANG Lin SU Changzhe DONG Ju KE Zhuofan ZHENG chonghui cheng Bowen TONG Dong LIU State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhouZhejiang 310027China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China Shanghai Institute of Satellite Engineering Shanghai201109China

A method to tighten the cloud screening thresholds based on local conditions is used to provide more stringent schemes for Orbiting Carbon Observatory-2(OCO-2)cloud screening *** screening strategies are essential to remove scenes with significant cloud and/or aerosol contamination from OCO-2 observations,which helps to save on the data processing cost and ensure high quality retrievals of the column-averaged CO2 dry air mole fraction(XCO2).Based on the radiance measurements in the 0.76μm O2A band,1.61μm(weak),and 2.06μm(strong)CO2 bands,the current combination of the A-Band Preprocessor(ABP)algorithm and Iterative Maximum A Posteriori(IMAP)Differential Optical Absorption Spectroscopy(DOAS)Preprocessor(IDP)algorithm passes around 20%-25%of all soundings,which means that some contaminated scenes also pass the screening *** this work,three independent pairs of threshold parameters used in the ABP and IDP algorithms are sufficiently tuned until the overall pass rate is close to the monthly clear-sky fraction from the MODIS cloud *** tightened thresholds are applied to observations over land surfaces in Europe and Japan in *** results show improvement of agreement and positive predictive value compared to the collocated MODIS cloud mask,especially in summer and *** addition,analysis indicates that XCO2 retrievals with more stringent thresholds are in closer agreement with measurements from collocated Total Carbon Column Observing Network(TCCON)sites.

关键词： cloud screening CO2 retrieval OCO-2 MODIS TCCON

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创业投资政府引导基金:国外研究进展及启示

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公共行政评论 2019年第1期12卷 89-108,213,214页

作者：程聪慧郭俊华湖南大学法学院公共管理系上海交通大学国际与公共事务学院

创业投资对国家创新能力提升与经济可持续发展有重要意义,为有效解决创业资源配置中的市场失灵及政府直接干预的低效问题,创业投资政府引导基金政策应运而生,并逐渐成为创新创业政策领域的重要研究对象。为把握国外学术界对该问题的研... 详细信息

创业投资对国家创新能力提升与经济可持续发展有重要意义,为有效解决创业资源配置中的市场失灵及政府直接干预的低效问题,创业投资政府引导基金政策应运而生,并逐渐成为创新创业政策领域的重要研究对象。为把握国外学术界对该问题的研究趋势,论文利用斯高帕斯(Scopus)和科学引文索引(Web of Science)数据库,追溯1996—2017年间发表的相关文献,系统阐释了政府干预创业投资与设立引导基金的动机,总结并分析了政府引导基金的概念及其运作模式,梳理了关于政府引导基金分别对创业投资市场发展、创业投资机构投资行为、创业企业成长及创新产出等发挥影响的实证结论,并给出相关研究对改进政策设计的有益启示。结合中国的制度背景,提出本土研究只有通过多主体、全链条的系统性分析,才能在深化理论的同时推动实践发展。

关键词：创业投资政府引导基金国外研究研究进展研究启示

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A-Train卫星传感器的台风云体三维结构构建

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遥感学报 2022年第11期26卷 2192-2203页

作者：程崇慧陈斯婕郑卓凡董长哲苏林柯举王帅博仝博文刘东浙江大学光电科学与工程学院杭州310027 上海卫星工程研究所上海200240 中国科学院空天信息创新研究院遥感科学国家重点实验室北京100101

基于星载主-被动传感器数据,本研究利用约束光谱辐射匹配CSRM (Constrained Spectral Radiance Matching)算法构建了8个西太平洋台风事件中的深对流云层三维结构模型,并据此分析深对流云在台风不同发展阶段中的水平分布特征和微物理特... 详细信息

基于星载主-被动传感器数据,本研究利用约束光谱辐射匹配CSRM (Constrained Spectral Radiance Matching)算法构建了8个西太平洋台风事件中的深对流云层三维结构模型,并据此分析深对流云在台风不同发展阶段中的水平分布特征和微物理特征。利用CSRM算法进行大气三维结构构建的意义在于将主动遥感的垂直分布信息向被动遥感的探测范围传递,增加统计分析8个台风事件可用的廓线数量,进一步保证对深对流云统计分析的有效性,统计分析结果表明:(1)衰弱期台风的深对流云占比(占所有种类云的比例)比增强期台风更低,并且其值在各个方向上更稳定。相比于台风,热带风暴中的深对流云占比在各个方向上差异更大,即不对称性更强;(2)热带气旋中深对流云的冰云有效粒子半径与高度成正比。随着高度增加,冰水粒子数浓度先增加后减少。同一热带气旋不同发展阶段的深对流云的冰水含量IWC (Ice Water Content)的垂直分布有着较大的差别。当热带气旋发展成台风时,其内部深对流云的IWC高值区逐渐向云层顶部集中,并且随着台风从增强期转化为衰弱期,IWC的最大值显著增大。

关键词：台风事件星载主—被动数据融合深对流云三维结构微物理特性

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Xa1 Allelic R Genes Activate Rice Blight Resistance Suppressed by Interfering TAL Effectors

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Plant Communications 2020年第4期1卷 54-62页

作者： chonghui Ji Zhiyuan Ji Bo Liu He cheng Hua Liu Sanzhen Liu Bing Yang Gongyou Chen Division of Plant Sciences C.Bond Life Science CenterUniversity of MissouriColumbiaMO 65211USA School of Agriculture and Biology/State Key Laboratory of Microbial Metabolism Shanghai Jiao Tong UniversityShanghai 200240P.R.China National Key Facility for Crop Gene Resources and Genetic Improvement(NFCRI) Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081P.R.China Department of Plant Pathology Kansas State UniversityManhattanKS 66506USA Donald Danforth Plant Science Center St.LouisMO 63132USA

Xanthomonas oryzae pathovar oryzae(Xoo)uses transcription activator-like effectors(TALEs)to cause bacterial blight(BB)in *** turn,rice has evolved several mechanisms to resist BB by targeting *** mechanism involves the nucleotide-binding leucine-rich repeat(NLR)resistance gene Xa1 and ***,Xoo has evolved TALE variants,C-terminally truncated versions(interfering TALEs or iTALEs),to overcome Xa1 ***,it remains unknown to what extent the two co-adaptive mechanisms mediate Xoo–rice *** this study,we cloned and characterized five additional Xa1 allelic R genes,Xa2,Xa31(t),Xa14,CGS-Xo111,and Xa45(t)from a collection of rice *** analysis revealed that Xa2 and Xa31(t)from different rice cultivars are *** genes and their predicted proteins were found to be highly conserved,forming a group of Xa1 *** XA1 alleles could be distinguished by the number of C-terminal tandemrepeats consisting of 93 amino acid residues and ranged from four in XA14 to seven in XA45(t).Xa1 allelic genes were identified in the 3000 rice genomes *** the other hand,iTALEs could suppress the resistance mediated by Xa1 allelic R genes,and iTALE genes were prevalent(95%)in Asian,but not in African Xoo *** findings demonstrate the prominence of a defense mechanism in which rice depends on Xa1 alleles and a counteracting mechanismin which Xoo relies on iTALEs for BB.

关键词： Xa2 Xa14 Xa45(t) TAL effector iTAL effector bacterial blight

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含复铰有高副平面运动链结构类型综合的邻接矩阵法

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机械科学与技术 2007年第7期26卷 862-866页

作者：宋黎成玲范崇辉湘潭大学机械工程学院湘潭411105

提出了含复铰有高副平面运动链结构类型综合的邻接矩阵方法。推广了传统的"低副高代"方法。根据平面连杆运动链的邻接矩阵,应用"低副高代"方法可以获得所有可能的含复铰有高副平面运动链结构类型。讨论了多阶杆和复铰在"低副高代"过程... 详细信息

提出了含复铰有高副平面运动链结构类型综合的邻接矩阵方法。推广了传统的"低副高代"方法。根据平面连杆运动链的邻接矩阵,应用"低副高代"方法可以获得所有可能的含复铰有高副平面运动链结构类型。讨论了多阶杆和复铰在"低副高代"过程中的处理方法,对获得的有高副运动链的合理性进行识别,并提出了相应的基本方法和基本算法。依据这个方法,获得了从218种无复铰和含复铰9杆2自由度平面连杆运动链转化的无复铰和含复铰有高副平面运动链共336类1620种。

关键词：高副复铰平面运动链结构类型综合邻接矩阵

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Standard pancreatoduodenectomy versus extended pancreatoduodenectomy with modified retroperitoneal nerve resection in patients with pancreatic head cancer:a multicenter randomized controlled trial

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Cancer Communications 2023年第2期43卷 257-275页

作者： Qing Lin Shangyou Zheng Xianjun Yu Meifu Chen Yu Zhou Quanbo Zhou chonghui Hu Jing Gu Zhongdong Xu LinWang Yimin Liu Qingyu Liu MinWang Guolin Li He cheng Dongkai Zhou Guodong Liu Zhiqiang Fu Yu Long Yixiong Li Weilin Wang Renyi Qin Zhihua Li Rufu Chen Department of Pancreas Center Department of General SurgeryGuangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhouGuangdongPeople’s Republic of China Department of Pancreatobiliary Surgery Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhouGuangdongPeople’s Republic of China Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation Medical Research Center Sun Yat-Sen Memorial HospitalSun Yat-Sen UniversityGuangzhouGuangdongPeople’s Republic of China Department of Pancreatic Surgery Fudan University Shanghai Cancer CenterShanghaiPeople’s Republic of China Hunan Research Center of Biliary Disease/Department of Hepatobiliary Surgery Hunan Provincial People’s Hospital/The First Affiliated Hospital of Hunan Normal UniversityChangshaHunanPeople’s Republic of China Department of Medical Statistics School of Public HealthSun Yat-sen UniversityGuangzhouGuangdongPeople’s Republic of China Department of Anesthesiology Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhouGuangdongPeople’s Republic of China Department of Pathology Sun Yat-sen Memorial HospitalGuangzhouGuangdongPeople’s Republic of China Department of Oncology Sun Yat-sen Memorial HospitalSun Yat-sen University GuangzhouGuangdongPeople’s Republic of China Department of Radiology Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhouGuangdongPeople’s Republic of China Department of Biliary-Pancreatic Surgery Affiliated Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubeiPeople’s Republic of China Department of Hepatobiliary Pancreatic and Splenic surgerythe Sixth Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdongPeople’s Republic of China Hepatobiliary and Pancreatic Interventional Treatment Center Division of Hepatobiliary and Pancreatic SurgeryThe First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhouZhejiangPeople’s Republic of China Department of General Surge

Background:The extent of pancreatoduodenectomy for pancreatic head cancer remains controversial,and more high-level clinical evidence is *** study aimed to evaluate the outcome of extended pancreatoduodenectomy(EPD)with retroperitoneal nerve resection in pancreatic head ***:This multicenter randomized trial was performed at 6 Chinese highvolume hospitals that enrolled patients between October 3,2012,and September 21,*** hundred patients with stage I or II pancreatic head cancer and without specific pancreatic cancer treatments(preoperative chemotherapy or chemoradiation)within three months were randomly assigned to undergo standard pancreatoduodenectomy(SPD)or EPD,with the latter followed by dissection of additional lymph nodes(LNs),nerves and soft tissues 270◦on the right side surrounding the superior mesenteric artery and celiac *** primary endpoint was overall survival(OS)by intention-to-treat(ITT).The secondary endpoints were disease-free survival(DFS),mortality,morbidity,and postoperative pain ***:TheR1 ratewas slightly lower with EPD(8.46%)thanwith SPD(12.56%).The morbidity and mortality rates were similar between the two *** median OS was similar in the EPD and SPD groups by ITT in the whole study cohort(23.0 vs.20.2 months,P=0.100),while the median DFS was superior in the EPD group(16.1 vs.13.2 months,P=0.031).Patients with preoperative CA19–9<200.0 U/mL had significantly improved OS and DFS with EPD(EPD ***,30.8 vs.20.9 months,P=0.009;23.4 vs.13.5 months,P<0.001).The EPD group exhibited significantly lower locoregional(16.48%vs.35.20%,P<0.001)andmesenteric LNrecurrence rates(3.98%vs.10.06%,P=0.022).The EPD group exhibited less back pain 6 months postoperation than the SPD ***:EPD for pancreatic head cancer did not significantly improve OS,but patients with EPD treatment had significantly improved *** the subgroup analysis,improvements in bothOS and DFS in the EPD armwere observed in pati

关键词： disease-free survival extended lymph nodes nerve resection overall survival pancreatic head cancer pancreatoduodenectomy standard

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用于心脏起搏器的经皮能量传输系统

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电工技术学报 2010年第3期25卷 48-53,60页

作者：周煜于歆杰程锦闽王崇慧王琳清华大学电机系电力系统国家重点实验室北京100084 中国医学科学院北京协和医院北京100730

针对心脏起搏器传统供能方式带来的弊端,研制了基于无线方式的经皮能量传输系统。在利用计算机仿真确定该系统工作频率的基础上,提出了该系统核心部分(经皮变压器)的数学模型并用实验加以验证。采用电容补偿手段使系统二次侧电路的输出... 详细信息

针对心脏起搏器传统供能方式带来的弊端,研制了基于无线方式的经皮能量传输系统。在利用计算机仿真确定该系统工作频率的基础上,提出了该系统核心部分(经皮变压器)的数学模型并用实验加以验证。采用电容补偿手段使系统二次侧电路的输出电压满足心脏起搏器充电芯片的电压要求,利用与人体磁介质参数接近的猪皮进行了完整充电实验并绘制了充电曲线,从而证实了该系统的可行性。

关键词：经皮能量传输系统无线频率经皮变压器

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Clinical characteristics and coronary features of coronary ectasia and aneurysm in China

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World Journal of Cardiovascular Diseases 2013年第1期3卷 18-21页

作者： Zhongwei cheng Yingxian Liu Shuyang Zhang Wei Wu Zhujun Shen Zhongjie Fan Hongzhi Xie Zhenyu Liu Xiaofeng Jin chonghui Wang Yong Zeng Quan Fang Department of Cardiology Peking Union Medical College Hospital Peking Union Medical College and Chinese Academy of Medi- cal Sciences Beijing China

Objective: To describe the clinical characteristics and coronary features of patients with coronary ectasia and aneurysm (CEA) in China. Methods: This was a single center, retrospective clinical study. Patients with CEA who diagnosed by coronary artery angiography (CAG) from April 2003 to October 2009, were enrolled. All patients were followed up by the call or clinic visit. The primary outcome was all-cause mortality or cardiovascular readmission. Results: A total of 39 patients (27 male, mean age 59.5 ± 12.6 years) diagnosed with CEA, with a prevalence of 0.6% (a total of 6,130 patients underwent CAG during the same period). Thirty-six patients constituted the study population, due to 3 patients lost of follow-up. The median follow-up was 27 months (1 - 76). The single vessel was involved in 11 patients (31%), two vessels were involved in 14 patients (38%) and three or more vessels were involved in 11 patients (31%). The most common involved vessel was left anterior descending branch (n = 27), followed by right coronary artery (n = 23), left circumflex branch (n = 20) and left main branch (n = 9). There was no death during the follow-up. The primary outcome was observed in 8 (22%) patients. The use of clopidogrel and statins were associated with lower rate of cardiovascular readmission. Conclusion The incidence of CEA was low among patients who referred for CAG in China. The majority of patients had the involvement of multiple vessels, and left anterior descending branch was the most common involved vessel. The CEA patients may benefit from clopidogrel and statins.

关键词： Coronary Ectasia Coronary Aneurysm Coronary Feature

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无线经皮能量传输系统的试验研究和分析

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电工技术学报 2010年第7期25卷 14-18页

作者：周煜于歆杰李臻程锦闽王崇慧王琳清华大学电机工程与应用电子技术系电力系统国家重点实验室北京100084 中国医学科学院北京协和医院北京100730

对前期研制的无线经皮能量传输系统(TETS)原理性样机进行深入的试验研究和分析。为模拟TETS在真实诊疗设备负载下的充放电情况,利用小阻值负载开展多周期充放电试验研究并对结果进行了分析。在此基础之上,结合能量守恒定律推导了TETS的... 详细信息

对前期研制的无线经皮能量传输系统(TETS)原理性样机进行深入的试验研究和分析。为模拟TETS在真实诊疗设备负载下的充放电情况,利用小阻值负载开展多周期充放电试验研究并对结果进行了分析。在此基础之上,结合能量守恒定律推导了TETS的预期使用寿命,从而证实了该系统的可行性。此外,文章还结合国内外电磁辐射标准中SAR限值的规定对TETS样机进行了定量分析,在此基础上提出了展望。

关键词：经皮能量传输系统充放电试验电磁安全 SAR 参数

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集体土地使用权入市的相关法律问题思考

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科教导刊 2016年第3期 142-143页

作者：程艺博高崇慧云南财经大学法学院云南昆明650221

十八届三中全会后,土地改革大方向已定,集体土地使用权入市的政策也逐渐被确定下来。然而集体土地使用权入市交易并非易事,需要政治、经济、立法等各个方面的配合与支持,还要对可能会出现的一系列社会问题进行防范。

关键词：集体土地入市流转法律思考

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