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37篇 您的检索式:作者名="Chi Zhan"
    题名 作者 年代 出处 被引量
1Data Logic Structure and Key Technologies on Intelligent High-precision Map显示文摘Taking autonomous driving and driverless as the research object,we discuss and define intelligent high-precision map.Intelligent high-precision map is considered as a key link of future travel,a carrier of real-time perception of traffic resources in the entire space-time range,and the criterion for the operation and control of the whole process of the vehicle.As a new form of map,it has distinctive features in terms of cartography theory and application requirements compared with traditional navigation electronic maps.Thus,it is necessary to analyze and discuss its key features and problems to promote the development of research and application of intelligent high-precision map.Accordingly,we propose an information transmission model based on the cartography theory and combine the wheeled robot’s control flow in practical application.Next,we put forward the data logic structure of intelligent high-precision map,and analyze its application in autonomous driving.Then,we summarize the computing mode of“Crowdsourcing+Edge-Cloud Collaborative Computing”,and carry out key technical analysis on how to improve the quality of crowdsourced data.We also analyze the effective application scenarios of intelligent high-precision map in the future.Finally,we present some thoughts and suggestions for the future development of this field.Jingnan LIU Jiao ZHAN Chi GUO Tingting LEI Ying LI 2020Journal of Geodesy and Geoinformation Science2020,3,3:11
2An open-labeled, randomized, multicenter phase Ⅱa study of gambogic acid injection for advanced malignant tumors显示文摘CHI Yihebali ZHAN Xiao-kai YU Hao XIE Guang-ru WANG Zhen-zhong XIAO Wei WANG Yong-gang XIONG Fu-xing HU Jun-feng YANG Lin CUI Cheng-xu WANG Jin-wan 2013Chinese Medical Journal2013,,9:10
3Kindlin-2 expression in adult tissues correlates with their embryonic origins显示文摘Kindlin-2 functions in the maintenance of homeostasis and in human diseases.This study investigated the interrelationship between Kindlin-2 expression in tissues and the corresponding germ layers from which these tissues originated.Kindlin-2 expression was examined in normal adult human organs and human cancer tissues by immunohistochemical analyses.Analysis of Kindlin-2 mRNA levels in adult human organs in the Oncomine dataset revealed Kindlin-2 is highly expressed in mesoderm-derived organs.However,Kindlin-2 was negative or weakly expressed in endoderm/ectoderm-derived organs.Interestingly,the abnormal expression of Kindlin-2 was observed in a variety of human cancers.In agreement with its expression profile in humans,Kindlin-2 was also highly expressed in mesoderm-derived organs in mouse embryos with the exception of strong Kindlin-2 expression in ectoderm-derived spinal cord and ganglia,tissues that are highly mobile during embryonic development.Importantly,we demonstrated the expression level of Kindlin-2 in adult organs correlated with their embryonic dermal origins and deregulation of Kindlin-2 in tissues is associated with tumor progression.This finding will help us understand the dual role of Kindlin-2 in the regulation of tumor progression and embryonic development.ZHAN Jun YANG Mei CHI XiaoChun ZHANG Jing PEI XueLian REN CaiXia GUO YongQing LIU Wei ZHANG HongQuan 2014Science China(Life Sciences)2014,57,7:8
4Integrin-interacting protein Kindlin-2 induces mammary tumors in transgenic mice显示文摘Kindlin-2, an integrin-interacting protein, regulates breast cancer progression. However, currently, no animal model to study the role of Kindlin-2 in the carcinogenesis of mammary gland is available. We established a Kindlin-2 transgenic mouse model using a mammary gland-specific promoter, mammary tumor virus(MMTV) long terminal repeat(LTR). Kindlin-2 was overexpressed in the epithelial cells of the transgenic mice. The mammary gland ductal trees were found to grow faster in MMTV-Kindlin-2 transgenic mice than in control mice during puberty. Kindlin-2 promoted mammary gland growth as indicated by more numerous duct branches and larger lumens, and more alveoli were formed in the mammary glands during pregnancy under Kindlin-2 overexpression. Importantly, mammary gland-specific expression of Kindlin-2 induced tumor formation at the age of 55 weeks on average. Additionally, the levels of estrogen receptor and progesterone receptor were decreased, whereas human epidermal growth factor receptor 2 and β-catenin were upregulated in the Kindlin-2-induced mammary tumors. These findings demonstrated that Kindlin-2 induces mammary tumor formation via activation of the Wnt signaling pathway.Bing Li Xiaochun Chi Jiagui Song Yan Tang Juan Du Xiaokun He Xiaoran Sun Zhenwu Bi Yunling Wang Jun Zhan Hongquan Zhang 2019Science China(Life Sciences)2019,62,2:6
5Geochemical provenancing and direct dating of the Harbin archaic human cranium显示文摘As one of the most complete archaic human fossils,the Harbin cranium provides critical evidence for studying the diversification of the Homo genus and the origin of Homo sapiens.However,the unsystematic recovery of this cranium and a long and confused history since the discovery impede its accurate dating.Here,we carried out a series of geochemical analyses,including non-destructive X-ray fluorescence(XRF),rare earth elements(REE),and the Sr isotopes,to test the reported provenance of the Harbin cranium and get better stratigraphic constraints.The results show that the Harbin cranium has very similar XRF element distribution patterns,REE concentration patterns,and Sr isotopic compositions to those of the Middle Pleistocene-Holocene mammalian and human fossils recently recovered from the Harbin area.The sediments adhered in the nasal cavity of the Harbin cranium have a 87Sr/86Sr ratio of 0.711898,falling in the variation range measured in a core drilled near the Dongjiang Bridge,where the cranium was discovered during its reconstruction.The regional stratigraphic correlations indicate that the Harbin cranium was probably from the upper part of the Upper Huangshan Formation of the Harbin area,which has an optically stimulated luminescence dating constraint between 138 and 309 ka.U-series disequilibrium dating(n=10)directly on the cranium suggests that the cranium is older than 146 ka.The multiple lines of evidence from our experiments consistently support the theory that the Harbin cranium is from the late Middle Pleistocene of the Harbin area.Our study also shows that geochemical approaches can provide reliable evidence for locating and dating unsystematically recovered human fossils,and potentially can be applied to other human fossils without clear provenance and stratigraphy records.Qingfeng Shao Junyi Ge Qiang Ji Jinhua Li Wensheng Wu Yannan Ji Tao Zhan Chi Zhang Qiang Li Rainer Grun Chris Stringer Xijun Ni 2021The Innovation2021,2,3:3
6Reductive demetalation of manganese corroles:The substituent effect显示文摘锰 corroles 的减少的 demetalation 在 CH2Cl2/HCl 被调查(水) 由把 SnCl2 用作减少代理人的溶剂。demetalation 收益显著地取决于 corrole macrocycle 的取代者,这被发现。充满电子的锰 corrole 比电子缺乏的更容易经历减少的 demetalation。锰 5,10,15-tris (苯基) 的孤立的减少的 demetalation 收益在现在的系统的 corrole 是中等的(46%) 。至于电子缺乏的 Mn (III ) 5,10,15-tris (pentafluorophenyl ) corrole,在 HOAc 鈥揌2 SO4 (V/V = 3:1 ) 的导致酸的 demetalation 与 67% 的孤立的收益更好。Hai Yang Liu Ling Chen Fei Yam Hai Ying Zhan Xiao Ying Xiang Li Wang Huan Feng Jiang Chi Kwong Chang 2008Chinese Chemical Letters2008,19,8:3
7Highly reliable relative navigation for multi-UAV formation flight in urban environments显示文摘Formation flight of multiple Unmanned Aerial Vehicles(UAVs)is expected to bring significant benefits to a wide range of applications.Accurate and reliable relative position information is a prerequisite to safely maintain a fairly close distance between UAVs and to achieve inner-system collision avoidance.However,Global Navigation Satellite System(GNSS)measurements are vulnerable to erroneous signals in urban canyons,which could potentially lead to catastrophic consequences.Accordingly,on the basis of performing relative positioning with double differenced pseudoranges,this paper develops an integrity monitoring framework to improve navigation integrity(a measure of reliability)in urban environments.On the one hand,this framework includes a fault detection and exclusion scheme to protect against measurement faults.To accommodate urban scenarios,spatial dependence in the faults are taken into consideration by this scheme.On the other hand,relative protection level is rigorously derived to describe the probabilistic error bound of the navigation output.This indicator can be used to evaluate collision risk and to warn collision danger in real time.The proposed algorithms are validated by both simulations and flight experiments.Simulation results quantitatively reveal the sensitivity of navigation performance to receiver configurations and environmental conditions.And experimental results suggest high efficiency and effectiveness of the new integrity monitoring framework.Shizhuang WANG Xingqun ZHAN Yawei ZHAI Cheng CHI Jiawen SHEN 2021Chinese Journal of Aeronautics2021,34,7:3
8A new ent-labdane diterpenoid lactone from Andrographis paniculata显示文摘A new ent-labdane diterpenoid lactone was isolated from Andrographis paniculata.Its structure was identified on the basis of spectral data including 2D NMR.Xiao Chi Ma Zhan Ping Gou Chang Yuan Wang Ji Hong Yao Xiu Lan Xin Yuan Lin Ke Xin Liu 2010Chinese Chemical Letters2010,21,5:2
9Two new diterpene and sesquiterpene from Pteris dispar显示文摘A new diterpene and a new sesquiterpene were isolated from Pteris dispar and identified on the basis of spectral data including 2D NMR.Compounds 1 and 2 showed potent cytotoxic activity against KB cell.Zhan Ping Gou Nian Ci Liang Jie Hou Li Li Yan Tian Chang Yuan Wang Xun Cui Bao Jing Zhang Xiao Chi Ma 2011Chinese Chemical Letters2011,22,12:1
10A vaccine for hypertension based on peptide AngI-R: A pilot study显示文摘Fang Hong Wu Yong Quan Rabindra Pandey Shen Yi Liu Chi Li Zhan Xia Ma Yuan Lou Ming 2009International Journal of Cardiology2009,,1:1
11Corpus Augmentation for Improving Neural Machine Translation显示文摘The translation quality of neural machine translation(NMT)systems depends largely on the quality of large-scale bilingual parallel corpora available.Research shows that under the condition of limited resources,the performance of NMT is greatly reduced,and a large amount of high-quality bilingual parallel data is needed to train a competitive translation model.However,not all languages have large-scale and high-quality bilingual corpus resources available.In these cases,improving the quality of the corpora has become the main focus to increase the accuracy of the NMT results.This paper proposes a new method to improve the quality of data by using data cleaning,data expansion,and other measures to expand the data at the word and sentence-level,thus improving the richness of the bilingual data.The long short-term memory(LSTM)language model is also used to ensure the smoothness of sentence construction in the process of sentence construction.At the same time,it uses a variety of processing methods to improve the quality of the bilingual data.Experiments using three standard test sets are conducted to validate the proposed method;the most advanced fairseq-transformer NMT system is used in the training.The results show that the proposed method has worked well on improving the translation results.Compared with the state-of-the-art methods,the BLEU value of our method is increased by 2.34 compared with that of the baseline.Zijian Li Chengying Chi Yunyun Zhan 2020Computers, Materials & Continua2020,,7:1
12Automatic guidance of underground mining vehicles using laser sensors显示文摘CHI Hong-peng ZHAN Kai SHI Bo-qiang 2012Tunneling and Underground Space Technology2012,27,1:1
13CO2 curing for improving the properties of concrete blocks containing recycled aggregates 显示文摘ZHAN Baojian POON Chi Sun SHI Caijun 2013Cem Concr Compos2013,42,9:1
14Achieving white-light emission in a single-component polymer with halogen-assisted interaction显示文摘White-light emitting(WLE) polymers have attracted continuous attention for their promising applications in solid-state lighting,flexible display and related fields. However, achieving dual-emission and pure white-light emission in a single-component polymer is still challenging. In this study, a brominated single-component polymer Br OD-TFB was designed and synthesized,which shows dual-emission and white light emission properties in solution and room-temperature phosphorescence(RTP) in thin films. The dual-emission properties can be tuned by concentration, solvent polarity, and excitation energy. Spectral analyses and theoretical calculations reveal that the origin of the high-energy emission band(HEB) is intramolecular charge transfer(ICT)along the polymer chain, whilst the low-energy emission band(LEB) originates from the excited-state related to the intra-chain and inter-chain C–Br···π interactions as demonstrated by the single-crystal structure of the model compound. Appropriate control of the formation and the destruction of the halogen-assisted interactions can initiate white-light emission in the singlecomponent polymer. More interestingly, by dispersing Br OD-TFB(0.1 wt%) in a non-emissive, colorless and transparent polymer, the characteristics of this white-light emission can be fully demonstrated while exhibiting unexpected RTP properties,with photoluminescence quantum efficiency(Φ_(PL)) of up to 23% and CIE coordinates of(0.32, 0.32).Zhuxin Zhou Zhu Mao Zhan Yang Tingting Yang Longji Zhu Yubo Long Zhenguo Chi Siwei Liu Matthew P.Aldred Xudong Chen Jiarui Xu Yi Zhang 2021Science China Chemistry2021,64,3:1
15The VP37-binding protein F1ATP synthase β subunit involved in WSSV in-fection in shrimp Litopenaeus vannamei显示文摘Zhan W B Wang X L Chi Y Y 0,,:1
16Automatic guidance of under-ground mining vehicles using laser sensors 显示文摘Chi Hongpeng Zhan Kai 2012Tunnellingand Underground Space Technology2012,27,:1
17Automatic guidance of underground mining vehicles using laser sensors 显示文摘Chi Hongpeng Zhan Kai Shi Boqiang 2012Tunnelling and Underground Space Technology2012,27,:1
18Electrophoretic Deposition of ZnCo2O4 Spinel and Its Electrocatalytic Properties for Oxygen Evolution Reaction显示文摘Chi Bo Yang Xiao - Zhan Lin Hong 2005Electrochimica Acta2005,,50:1
19Automatic guidance of underground mining vehicles using laser sensors显示文摘CHI H P ZHAN K SHI B Q 2012Tunnelling and Underground Space Technology2012,27,1:1
20Automatic guidance o显示文摘Hongpeng Chi Kai Zhan Boqiang Shi 2012Tunnell- ing and Underground Space Technology2012,27,:1
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