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| 1 | Stable classi?cation with limited sample: transferring a 30-m resolution sample set collected in 2015 to mapping 10-m resolution global land cover in 2017显示文摘As the world strives to reduce the impact of population growth, urbanization, agricultural expansion, and climate change on food security, energy and water shortage, resource over-exploration, biodiversity loss, environmental pollution, and ultimately human health, timely and higher resolution land cover information is urgently needed to achieve the sustainable development goals of the United Nations. | Peng Gong Han Liu Meinan Zhang Congcong Li Jie Wang Huabing Huang Nicholas Clinton Luyan Ji Wenyu Li Yuqi Bai Bin Chen Bing Xu Zhiliang Zhu Cui Yuan Hoi Ping Suen Jing Guo Nan Xu Weijia Li Yuanyuan Zhao Jun Yang Chaoqing Yu Xi Wang Haohuan Fu Le Yu Iryna Dronova Fengming Hui Xiao Cheng Xueli Shi Fengjin Xiao Qiufeng Liu Lianchun Song | 2019 | Science Bulletin2019，64，6： | 166 |
| 2 | 2018 Chinese Pediatric Cardiology Society(CPCS) guideline for diagnosis and treatment of syncope in children and adolescents显示文摘Syncope belongs to the transient loss of consciousness(TLOC), characterized by a rapid onset, short duration, and spontaneous complete recovery. It is common in children and adolescents, accounting for 1% to 2% of emergency department visits.Recurrent syncope can seriously affect children's physical and mental health, learning ability and quality of life and sometimes cardiac syncope even poses a risk of sudden death. The present guideline for the diagnosis and treatment of syncope in children and adolescents was developed for guiding a better clinical management of pediatric syncope. Based on the globally recent development and the evidence-based data in China, 2018 Chinese Pediatric Cardiology Society(CPCS) guideline for diagnosis and treatment of syncope in children and adolescents was jointly prepared by the Pediatric Cardiology Society, Chinese Pediatric Society, Chinese Medical Association(CMA)/Committee on Pediatric Syncope, Pediatricians Branch, Chinese Medical Doctor Association(CMDA)/Committee on Pediatric Cardiology, Chinese College of Cardiovascular Physicians, Chinese Medical Doctor Association(CMDA)/Pediatric Cardiology Society, Beijing Pediatric Society, Beijing Medical Association(BMA). The present guideline includes the underlying diseases of syncope in children and adolescents, the diagnostic procedures, methodology and clinical significance of standing test and headup tilt test, the clinical diagnosis vasovagal syncope, postural orthostatic tachycardia syndrome, orthostatic hypotension and orthostatic hypertension, and the treatment of syncope as well as follow-up. | Cheng Wang Yaqi Li Ying Liao Hong Tian Min Huang Xiangyu Dong Lin Shi Jinghui Sun Hongfang Jin Junbao Du Jindou An Jie Chen Mingwu Chen Qi Chen Sun Chen Yonghong Chen Zhi Chen Adolphus Kai-tung Chau Junbao Du Zhongdong Du Junkai Duan Hongyu Duan Xiangyu Dong Lin Feng Lijun Fu Fangqi Gong Yonghao Gui Ling Han Zhenhui Han Bing He Zhixu He Xiufen Hu Yimin Hua Guoying Huang Min Huang Ping Huang Yujuan Huang Hongfang Jin Mei Jin Bo Li Fen Li Tao Li Xiaohui Li Xiaoyan Liu Yan Li Haitao Lv Tiewei Lv Zipu Li Luyi Ma Silin Pan Yusheng Pang Hua Peng Yuming Qin Jie Shen Lin Shi Kun Sun Jinghui Sun Hong Tian Jie Tian Cheng Wang Hong Wang Lei Wang Jinju Wang Wendi Wang Yuli Wang Rongzhou Wu Tianhe Xia Yanyan Xiao Chunhong Xie Yanlin Xing Zhenyu Xiong Baoyuan Xu Yi Xu Hui Yan Shiwei Yang Qijian Yi Xia Yu Xianyi Yu Yue Yuan Hongyan Zhang Huili Zhang Li Zhang Qingyou Zhang Xi Zhang Yanmin Zhang Zhiwei Zhang Cuifen Zhao Bin Zhou Hua Zhu | 2018 | Science Bulletin2018，63，23： | 54 |
| 3 | Detection of nighttime sea fog/stratus over the Huang-hai Sea using MTSAT-1R IR data显示文摘A dual channel difference (DCD) method is applied to detect nighttime sea fog/stratus over the Huanghai Sea using the infrared (IR) data of shortwave (3.5–4.0 μm) and longwave (10.3–11.3 μm) channels from the Multi-functional Transport Satellite (MTSAT)-1R, i.e., shortwave minus longwave brightness temperature difference (SLTD). Twenty-four sea fog events over the Huanghai Sea during March to July of 2006 and 2007 are chosen to determine a suitable value of SLTD for nighttime sea fog/stratus detection, and it is found that the value of –5.5––2.5°C can be taken as a criterion. Two case examples of sea fog events are especially demonstrated in detail utilizing the criterion, and the results show that the derived sea fog/stratus coverage is quite reasonable. This coverage information is very helpful to analyze the formation and evolution of sea fog/stratus during night and can provide sea fog researchers with observational evidences for model results verification. However, more efforts are needed to further obtain vertical extent information of sea fog/stratus and attempt to discriminate between sea fog and stratus. | GAO Shanhong WU Wei ZHU Leilei FU Gang HUANG Bin | 2009 | Acta Oceanologica Sinica2009，28，2： | 36 |
| 4 | Reactive Current Allocation and Control Strategies Improvement of Low Voltage Ride Though for Doubly Fed Induction Wind Turbine Generation System显示文摘为满足风电机组低电压穿越(low voltage ride through,LVRT)的测试要求及其电气模型一致性评估需要,提出考虑向电网注入无功电流的双馈风电机组LVRT的控制策略。在阐述风电机组LVRT测试要求及控制原理的基础上,推导双馈发电机(doubly fed induction generator,DFIG)定子侧及网侧变流器输出无功电流极限表达式,研究电网电压跌落深度和发电机总输出有功功率对其无功电流极限值的影响规律,进而提出DFIG在LVRT期间的无功电流分配算法和改进的有功、无功功率控制策略。最后,以某实际2 MW双馈风电机组为例,分别对风速为5和12 m/s、电网电压对称跌落至20%和50%工况下的LVRT运行性能进行仿真比较和样机测试。与传统LVRT控制方法的对比表明,所提改进控制策略能更好地满足风电机组LVRT的测试要求。样机测试结果进一步证明了改进控制策略和仿真模型的有效性。 | LI Hui FU Bo YANG Chao ZHAO Bin TANG Xianhu | 2012 | 中国电机工程学报2012，32，22： | 36 |
| 5 | Shortened Basal Internodes Encodes a Gibberellin 2-Oxidase and Contributes to Lodging Resistance in Rice显示文摘改进住宿抵抗的繁殖半矮子变化被证明了在自从绿 revolution.?However 的来临,增加谷物产量极其成功,在亚洲繁殖半矮子米饭变化的多数主要依赖于 SD1 的变异的等位基因的基因介绍,它编码赤霉素( GA ) 20-oxidase , OsGA20ox2 ,为催化 GA 生合成。这里,我们报导新米饭住宿抵抗基因,弄短的基础 Internodes (SBI ) ,它编码赤霉素 ? 2-oxidase 并且明确地控制灰煤杆的延伸通过撤销的基础 internodes GA 活动。SBI 主要在灰煤杆被表示基础 internodes。基因分析显示 SBI 是影响米饭高度和住宿抵抗的半主导的基因。SBI 突变而产生之遗传的变体显示不同活动并且与米饭变化的高度被联系。与 SBI 等位基因的更高的活动繁殖与改进住宿抵抗和增加的产量产生新米饭变化。SBI 的发现为生产半矮子米饭显型提供一个理想的基因资源并且为与提高的住宿抵抗和高产量引起米饭变化提供有效策略。 | Chang Liu Jinshan Gui Chenjian Fu Hasi Yu Dongliang Song Junhui Shen Peng Qin Xuanming Liu Bin Han Yuanzhu Yang Laigeng Li | 2018 | Molecular Plant2018，11，2： | 33 |
| 6 | ZIKA virus isolated from mosquitoes:a field and laboratory investigation in China,2016显示文摘A field investigation of arboviruses was conducted in Dejiang, Guizhou Province in the summer of 2016. A total of 8,795 mosquitoes, belonging to four species of three genera, and 1,300 midges were collected. The mosquito samples were identified on site according to their morphology, and the pooled samples were ground and centrifuged in the laboratory. The supernatant was incubated with mosquito tissue culture cells(C6/36) and mammalian cells(BHK-21) for virus isolation. The results indicated that 40%(3,540/8,795) were Anopheles sinensis, 30%(2,700/8,795) were Culex pipiens quinquefasciatus, and 29%(2,530/8,795)were Armigeres subbalbeatus. Furthermore, a total of eight virus isolates were obtained, and genome sequencing revealed two Zika viruses(ZIKVs) isolated from Culex pipiens quinquefasciatus and Armigeres subbalbeatus, respectively; three Japanese encephalitis viruses(JEVs) isolated from Culex pipiens quinquefasciatus; two Banna viruses(BAVs) isolated from Culex pipiens quinquefasciatus and Anopheles sinensis, respectively; and one densovirus(DNV) isolated from Culex pipiens quinquefasciatus.The ZIKVs isolated from the Culex pipiens quinquefasciatus and Armigeres subbalbeatus mosquitoes represent the first ZIKV isolates in China's Mainland. This discovery presents new challenges for the prevention and control of ZIKV in China, and prompts international cooperation on this global issue. | Shihong Fu Song Song Hong Liu Yuanyuan Li Xiaolong Li Xiaoyan Gao Ziqian Xu Guoping Liu Dingming Wang Zhenzao Tian Jingzhu Zhou Ying He Wenwen Lei Huanyu Wang Bin Wang Xiaoqing Lu Guodong Liang | 2017 | Science China(Life Sciences)2017，60，12： | 25 |
| 7 | Effect of local wound infiltration with ropivacaine on postoperative pain relief and stress response reduction after open hepatectomy显示文摘AIM To prospectively evaluate the effect of local wound infiltration with ropivacaine on postoperative pain relief and stress response reduction after open hepatectomy.METHODS A total of 56 patients undergoing open hepatectomy were randomly divided into two groups:a ropivacaine group(wound infiltration with ropivacaine solution)and a control group(infiltration with isotonic saline solution).A visual analog scale(VAS)at rest and on movement was used to measure postoperative pain for the first 48 h after surgery.Mean arterial pressure(MAP),heart rate(HR),time to bowel recovery,length of hospitalization after surgery,cumulative sufentanil consumption,and incidence of nausea and vomiting were compared between the two groups.Surgical stress hormones(epinephrine,norepinephrine,and cortisol)were detected using enzyme-linked immunosorbent assay,and the results were compared. RESULTS VAS scores both at rest and on movement at 24 h and48 h were similar between the two groups.Significantly lower VAS scores were detected at 0,6,and 12 h in the ropivacaine group compared with the control group(P<0.05 for all).MAP was significantly lower at 6,12,and 24 h(P<0.05 for all);HR was significantly lower at 0,6,12,and 24 h(P<0.05 for all);time to bowel recovery and length of hospitalization after surgery(P<0.05 for both)were significantly shortened;and cumulative sufentanil consumption was significantly lower at 6,12,24,and 36 h(P<0.05 for all)in the ropivacaine group than in the control group,although the incidence of nausea and vomiting showed no significant difference between the two groups.The levels of epinephrine,norepinephrine,and cortisol were significantly lower in the ropivacaine group than in the control group at 24 and 48 h(P<0.01 for all). CONCLUSION Local wound infiltration with ropivacaine after open hepatectomy can improve postoperative pain relief,reduce surgical stress response,and accelerate postoperative recovery. | Jing-Xian Sun Ke-Yun Bai Yan-Feng Liu Gang Du Zhi-Hao Fu Hao Zhang Jin-Huan Yang Ben Wang Xiu-Yu Wang Bin Jin | 2017 | World Journal of Gastroenterology2017，23，36： | 25 |
| 8 | Characteristics, Management, and Outcomes of Acute Heart Failure in the Emergency Department: A Multicenter Registry Study with 1-year Follow-up in a Chinese Cohort in Beijing显示文摘 | Guo-Gan Wang Si-Jia Wang Jian Qin Chun-Sheng Li Xue-Zhong Yu Hong Shen Li-Pei Yang Yan Fu Ya-An Zheng Bin Zhao Dong-Min Yu Fu-Jun Qin De-Gui Zhou Ying Li Fu-Jun Liu Wei Li Wei Zhao Xin Gao Zheng Wang Ming Jin Hong Zeng Yi Li Guo-Xing Wang Hong Zhou Xiao-Lu Sun Peng-Bo Wang Kam-Sang Woo | 2017 | Chinese Medical Journal2017，，16： | 21 |
| 9 | On-road pollutant emission and fuel consumption characteristics of buses in Beijing显示文摘On-road emission and fuel consumption (FC) levels for Euro III and IV buses fueled on diesel and compressed natural gas (CNG) were compared,and emission and FC characteristics of buses were analyzed based on approximately 28,700 groups of instantaneous data obtained in Beijing using a portable emissions measurement system (PEMS).The experimental results revealed that NOx and PM emissions from CNG buses were decreased by 72.0% and 82.3% respectively,compared with Euro IV diesel buses.Similarly,these emissions were reduced by 75.2% and 96.3% respectively,compared with Euro III diesel buses.In addition,CO 2,CO,HC,NOx,PM emissions and FC of Euro IV diesel buses were reduced by 26.4%,75.2%,73.6%,11.4%,79.1%,and 26.0%,respectively,relative to Euro III diesel buses.The CO 2,CO,HC,NOx,PM emissions and FC factors all decreased with bus speed increased,while increased as bus acceleration increased.At the same time,the emission/FC rates as well as the emission/FC factors exhibited a strong positive correlation with the vehicle specific power (VSP).They all were the lowest when VSP < 0,and then rapidly increased as VSP increased.Furthermore,both the emission/FC rates and emission/FC factors were the highest at accelerations,higher at cruise speeds,and the lowest at decelerations for non-idling buses.These results can provide a base reference to further estimate bus emission and FC inventories in Beijing. | Aijuan Wang Yunshan Ge Jianwei Tan Mingliang Fu Asad Naeem Shah Yan Ding Hong Zhao Bin Liang | 2011 | Journal of Environmental Sciences2011，23，3： | 19 |
| 10 | Long-term outcomes and independent predictors of mortality in patients presenting to emergency departments with acute heart failure in Beijing:a multicenter cohort study with a 5-year follow-up显示文摘Background:Acute heart failure(AHF)is the most common disease in emergency departments(EDs).However,clinical data exploring the outcomes of patients presenting AHF in EDs are limited,especially the long-term outcomes.The purposes of this study were to describe the long-term outcomes of patients with AHF in the EDs and further analyze their prognostic factors.Methods:This prospective,multicenter,cohort study consecutively enrolled 3335 patients with AHF who were admitted to EDs of 14 hospitals from Beijing between January 1,2011 and September 23,2012.Kaplan-Meier and Cox regression analysis were adopted to evaluate 5-year outcomes and associated predictors.Results:The 5-year mortality and cardiovascular death rates were 55.4%and 49.6%,respectively.The median overall survival was 34 months.Independent predictors of 5-year mortality were patient age(hazard ratio[HR]:1.027,95 confidence interval[CI]:1.023-1.030),body mass index(BMI)(HR:0.971,95%CI:0.958-0.983),fatigue(HR:1.127,95%CI:1.009-1.258),ascites(HR:1.190,95%CI:1.057-1.340),hepatic jugular reflux(HR:1.339,95%CI:1.140-1.572),New York Heart Association(NYHA)class III to IV(HR:1.511,95%CI:1.291-1.769),heart rate(HR:1.003,95%CI:1.001-1.005),diastolic blood pressure(DBP)(HR:0.996,95%CI:0.993-0.999),blood urea nitrogen(BUN)(HR:1.014,95%CI:1.008-1.020),B-type natriuretic peptide(BNP)/N-terminal pro-B-type natriuretic peptide(NT-proBNP)level in the third(HR:1.426,95%CI:1.220-1.668)or fourth quartile(HR:1.437,95%CI:1.223-1.690),serum sodium(HR:0.980,95%CI:0.972-0.988),serum albumin(HR:0.981,95%CI:0.971-0.992),ischemic heart diseases(HR:1.195,95%CI:1.073-1.331),primary cardiomyopathy(HR:1.382,95%CI:1.183-1.614),diabetes(HR:1.118,95%CI:1.010-1.237),stroke(HR:1.252,95%CI:1.121-1.397),and the use of diuretics(HR:0.714,95%CI:0.626-0.814),(3-blockers(HR:0.673,95%CI:0.588-0.769),angiotensin-converting enzyme inhibitors(ACEIs)(HR:0.714,95%CI:0.604-0.845),angiotensin-II receptor blockers(ARBs)(HR:0.790,95%CI:0.646-0.965),spironolactone(HR:0.814,95%CI:0.663-0.999),calcium antagonists(HR:0.624,95%CI:0.531-0.733),nitrates(HR:0.715,95%CI:0.631-0.811),and digoxin(HR:0.579,95%CI:0.465-0.721).Conclusions:The results of our study demonstrate poor 5-year outcomes of patients presenting to EDs with AHF.Age,BMI,fatigue,ascites,hepatic jugular reflux,NYHA class III to IV,heart rate,DBP,BUN,BNP/NT-proBNP level in the third or fourth quartile,serum sodium,serum albumin,ischemic heart diseases,primary cardiomyopathy,diabetes,stroke,and the use of diuretics,P-blockers,ACEIs,ARBs,spironolactone,calcium antagonists,nitrates,and digoxin were independently associated with 5-year all-cause mortality. | Yang Li Xiao-Lu Sun Hong Qiu Jian Qin Chun-Sheng Li Xue-Zhong Yu Guo-Xing Wang Yan Fu Ya-An Zheng Bin Zhao Dong-Ming Yu Si-Jia Wang Guo-Gan Wang | 2021 | Chinese Medical Journal2021，，15： | 18 |
| 11 | Combined laparoscopic and thoracoscopic Ivor Lewis esophagectomy for esophageal cancer: initial experience from China显示文摘 | LI Hui HU Bin YOU Bin MIAO Jin-bai FU Yi-li CHEN Qi-rui | 2012 | Chinese Medical Journal2012，，8： | 17 |
| 12 | Piperine suppresses tumor growth and metastasis in vitro and in vivo in a 4T1 murine breast cancer model显示文摘目的: 调查胡椒碱,在 Piper nigrum 在场的主要的刺鼻的碱和 Piper longum 的效果,在肿瘤生长和老鼠 4T1 的转移上在 vitro 并且在 vivo 的乳房的癌,并且阐明内在的机制。 | Li-hua LAI Qi-hong FU Yang LIU Kai JIANG Qing-ming GUO Qing-yun CHEN Bin YAN Qing-qing WANG Jian-gen SHEN | 2012 | Acta Pharmacologica Sinica2012，33，4： | 16 |
| 13 | Initial study of biexponential model of intravoxel incoherent motion magnetic resonance imaging in evaluation of the liver fibrosis显示文摘 | Chen Cuiyun Wang Bin Shi Dapeng Fu Fangfang Zhang Jiliang Wen Zejun Zhu Shaocheng Xu Junling Lin Qing Li Jing Dou Shewei | 2014 | Chinese Medical Journal2014，，17： | 15 |
| 14 | Effect of endogenous hydrogen sulfide on oxidative stress in oleic acid-induced acute lung injury in rats显示文摘背景尖锐的肺损害(所有)是在在 ALl.Endogenous 氢硫化物( H2S )的致病的一个重要角色能禁止的紧急情况 care.Oxidative 压力戏的普通批评疾病在老鼠的氧化应力胃的 mucosal epithelium.In 这研究,我们在 rats.Methods 在油的导致酸的尖锐的肺损害在氧化压力的规定检验了 H2S 的可能的角色所有的老鼠模特儿被油的酸( OA )的intra尾巴静脉注射劝诱 .NaHs 答案被注射 | WANG Cong WANG Hai-ying LIU Zhi-wei FU Yan ZHAO Bin | 2011 | Chinese Medical Journal2011，，21： | 15 |
| 15 | Reactivation of γ-globin expression through Cas9 or base editor to treat β-hemoglobinopathies显示文摘Dear Editor,Mutations in the β-globin gene,the essential component of adult hemoglobin(HbA;a2p2),results in either a production of aberrant sickle hemoglobin(HbS)leading to sickle cell disease(SCD)or an insufficient β-globin synthesis leading to β-thalassemia.These two major forms of β-hemoglobinopathies cause impaired erythropoiesis and life-threatening anemia.Clinical evidence has suggested that reaaivation of fetal γ-globin(HBG)gene expression which is normally silenced after birth by certain genetic mutations can ameliorate the clinical course of β-hemoglobinopathies. | Liren Wang Linxi Li Yanlin Ma Handan Hu Qi Li Yang Yang Wenbang Liu Shuming Yin Wei Li Bin Fu Ryo Kurita Yukio Nakamura Mingyao Liu Yongrong Lai Dali Li | 2020 | Cell Research2020，30，3： | 14 |
| 16 | A Mitochondria-Targeted PPR Protein Restores pol Cytoplasmic Male Sterility by Reducing orF224 Transcript Levels in Oilseed Rape显示文摘 | Liu, Zhi Yang, Zonghui Wang, Xiang Li, Kaidi An, Hong Liu, Jie Yang, Guangsheng Fu, Tingdong Yi, Bin Hong, Dengfeng | 2016 | Molecular Plant2016，9，7： | 14 |
| 17 | Kiwifruit recognition at nighttime using artificial lighting based on machine vision显示文摘Most researches involved so far in kiwifruit harvesting robot suggest the scenario of harvesting in daytime for taking advantage of sunlight.A robot operating at nighttime can overcome the problem of low work efficiency and would help to minimize fruit damage.In addition,artificial lights can be used to ensure constant illumination instead of the variable natural sunlight for image capturing.This paper aims to study the kiwifruit recognition at nighttime using artificial lighting based on machine vision.Firstly,an RGB camera was placed underneath the canopy so that clusters of kiwifruits could be included in the images.Next,the images were segmented using an R-G color model.Finally,a group of image processing conventional methods,such as Canny operator were applied to detect the fruits.The image processing results showed that this capturing method could reduce the background noise and overcome any target overlapping.The experimental results showed that the optimal artificial lighting ranged approximately between 30-50 lx.The developed algorithm detected 88.3%of the fruits successfully. | Fu Longsheng Wang Bin Cui Yongjie Su Shuai Yoshinori Gejima Taiichi Kobayashi | 2015 | International Journal of Agricultural and Biological Engineering2015，8，4： | 14 |
| 18 | Hyperpolarization activated cation current (If) in cardiac myocytes from pulmonary vein sleeves in the canine with atrial fibrillation显示文摘Objective To investigate the characteristics of ectopic automaticity and cation current (If) of cardiac myocytes from pulmonary vein sleeves (PVs) in canines with atrial fibrillation. Methods The canines (8–10 years old) were subjected to long-term, rapid atrial pacing (RAP) for 10 weeks, which induced the atrial fibrillation model. Disassociation of PVs of canines yielded single cardiac myocytes from a Landengorff column. Action potential, If and hyperpolarisation activated cyclic nucleotide-gated (HCN) currents were measured with the patch-clamp technique. Results Compared with the control group, cardiac myocytes from the RAP canine PVs had spontaneous diastolic depolarization, shorter action potential duration, and larger If densities. In the group of RAP cells, the half maximal activation potential (V1/2) was found to be less negative (��105.5 ±5.2 mV) compared to control cells (��87.3 ±4.9 mV). Current densities of If were increased significantly by β-adrenergic receptor stimulation with isoproterenol and caused an acceleration of current activation. In contrast, If currents in the RAP were reduced by carvedilol, a selective beta-adrenergic receptor. Another important finding is that HCN4-based channels may make a significant contribution to If in PVs cells, but not HCN2. Meanwhile, HCN4 current significantly increases in canine PVs cardiac myocytes with RAP. Conclusions The spontaneous action potential and larger If currentwere observed in the PVs cardiac myocytes using RAP, whichmay contribute tomore ectopic activity events to trigger and maintain atrial fibrillation. | Jia-Yue Li Hong-Juan Wang Bin Xu Xue-Ping Wang Yi-Cheng Fu Mei-Yan Chen De-Xian Zhang Yan Liu Qiao Xue Yang Li | 2012 | Journal of Geriatric Cardiology2012，9，4： | 12 |
| 19 | Large field of view computed laminography with the asymmetric rotational scanning geometry显示文摘X-ray computed laminography(CL)is used in the fields of industrial inspection and medical imaging.It can provide the internal structure three-dimensional(3D)information of a region of the objects nondestructively.It is important to the clinical diagnosis and the quality control of flat objects like printed circuit boards,aircraft wings and satellite solar panels.With the restriction that the imaging region must be within the X-ray beam formed by the X-ray source and the detector,the imaging field of view of CL is limited by the size of detector.A new CL method with an asymmetric rotational cone-beam scanning geometry,called large field of view CL,is presented to overcome the existing disadvantage.It can extend the imaging region when the imaging spatial resolution keeps the same as that of the conventional CL.It can also improve the imaging spatial resolution when the imaging region keeps the same as that of the conventional CL.The asymmetric configuration can be achieved by offsetting the detector from the conventional symmetric configuration.It does not,however,require new detectors and X-ray source nor alter the scanning mechanical system.The filtered back-projection(FBP)reconstruction algorithm and the data truncation smoothing functions have been deduced to reconstruct the images directly from the data acquired with this asymmetric configuration.We performed numerical studies and experiments to demonstrate and validate the proposed approach. Results in these studies and experiments confirm that the proposed method can enlarge the imaging region and improve the spatial resolution.The proposed approach may find applications in the CL system with the rotational scanning geometry. | FU Jian 1,2 ,JIANG BaiHong&LI Bin 1 School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China 2 Research Center of Digital Radiation Imaging and Biomedical Imaging,Beihang University,Beijing 100191,China | 2010 | Science China(Technological Sciences)2010，53，8： | 12 |
| 20 | Insight-HXMT observations of the first binary neutron star merger GW170817显示文摘Finding the electromagnetic(EM) counterpart of binary compact star merger, especially the binary neutron star(BNS) merger,is critically important for gravitational wave(GW) astronomy, cosmology and fundamental physics. On Aug. 17, 2017,Advanced LIGO and Fermi/GBM independently triggered the first BNS merger, GW170817, and its high energy EM counterpart,GRB 170817 A, respectively, resulting in a global observation campaign covering gamma-ray, X-ray, UV, optical, IR, radio as well as neutrinos. The High Energy X-ray telescope(HE) onboard Insight-HXMT(Hard X-ray Modulation Telescope) is the unique high-energy gamma-ray telescope that monitored the entire GW localization area and especially the optical counterpart(SSS17 a/AT2017 gfo) with very large collection area(~1000 cm^2) and microsecond time resolution in 0.2-5 MeV. In addition,Insight-HXMT quickly implemented a Target of Opportunity(ToO) observation to scan the GW localization area for potential X-ray emission from the GW source. Although Insight-HXMT did not detect any significant high energy(0.2-5 MeV) radiation from GW170817, its observation helped to confirm the unexpected weak and soft nature of GRB 170817 A. Meanwhile,Insight-HXMT/HE provides one of the most stringent constraints(~10^(-7) to 10^(-6) erg/cm^2/s) for both GRB170817 A and any other possible precursor or extended emissions in 0.2-5 MeV, which help us to better understand the properties of EM radiation from this BNS merger. Therefore the observation of Insight-HXMT constitutes an important chapter in the full context of multi-wavelength and multi-messenger observation of this historical GW event. | TiPei Li ShaoLin Xiong ShuangNan Zhang FangJun Lu LiMing Song XueLei Cao Zhi Chang Gang Chen Li Chen TianXiang Chen Yong Chen YiBao Chen YuPeng Chen Wei Cui WeiWei Cui JingKang Deng YongWei Dong YuanYuan Du MinXue Fu GuanHua Gao He Gao Min Gao MingYu Ge YuDong Gu Ju Guan ChengCheng Guo DaWei Han Wei Hu Yue Huang Jia Huo ShuMei Jia LuHua Jiang WeiChun Jiang Jing Jin YongJie Jin Bing Li ChengKui Li Gang Li MaoShun Li Wei Li Xian Li XiaoBo Li XuFang Li YanGuo Li ZiJian Li ZhengWei Li XiaoHua Liang JinYuan Liao CongZhan Liu GuoQing Liu HongWei Liu ShaoZhen Liu XiaoJing Liu Yuan Liu YiNong Liu Bo Lu XueFeng Lu Tao Luo Xiang Ma Bin Meng Yi Nang JianYin Nie Ge OU JinLu Qu Na Sai Liang Sun Yin Tan Lian Tao WenHui Tao YouLi Tuo GuoFeng Wang HuanYu Wang Juan Wang WenShuai Wang YuSa Wang XiangYang Wen BoBing WU Mei Wu GuangCheng Xiao He Xu YuPeng Xu LinLi Yan JiaWei Yang Sheng Yang YanJi Yang AiMei Zhang ChunLei Zhang ChengMo Zhang Fan Zhang HongMei Zhang Juan Zhang Qiang Zhang Shu Zhang Tong Zhang Wei Zhang WanChang Zhang WenZhao Zhang Yi Zhang Yue Zhang YiFei Zhang YongJie Zhang Zhao Zhang ZiLiang Zhang HaiSheng Zhao JianLing Zhao XiaoFan Zhao ShiJie Zheng Yue Zhu YuXuan Zhu ChangLin Zou | 2018 | Science China(Physics,Mechanics & Astronomy)2018，61，3： | 12 |
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