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| 1 | A fundamental theorem for eco-environmental surface modelling and its applications显示文摘We propose a fundamental theorem for eco-environmental surface modelling(FTEEM) in order to apply it into the fields of ecology and environmental science more easily after the fundamental theorem for Earth’s surface system modeling(FTESM). The Beijing-Tianjin-Hebei(BTH) region is taken as a case area to conduct empirical studies of algorithms for spatial upscaling, spatial downscaling, spatial interpolation, data fusion and model-data assimilation, which are based on high accuracy surface modelling(HASM), corresponding with corollaries of FTEEM. The case studies demonstrate how eco-environmental surface modelling is substantially improved when both extrinsic and intrinsic information are used along with an appropriate method of HASM. Compared with classic algorithms, the HASM-based algorithm for spatial upscaling reduced the root-meansquare error of the BTH elevation surface by 9 m. The HASM-based algorithm for spatial downscaling reduced the relative error of future scenarios of annual mean temperature by 16%. The HASM-based algorithm for spatial interpolation reduced the relative error of change trend of annual mean precipitation by 0.2%. The HASM-based algorithm for data fusion reduced the relative error of change trend of annual mean temperature by 70%. The HASM-based algorithm for model-data assimilation reduced the relative error of carbon stocks by 40%. We propose five theoretical challenges and three application problems of HASM that need to be addressed to improve FTEEM. | Tianxiang YUE Na ZHAO Yu LIU Yifu WANG Bin ZHANG Zhengping DU Zemeng FAN Wenjiao SHI Chuanfa CHEN Mingwei ZHAO Dunjiang SONG Shihai WANG Yinjun SONG Changqing YAN Qiquan LI Xiaofang SUN Lili ZHANG Yongzhong TIAN Wei WANG Ying’an WANG Shengnan MA Hongsheng HUANG Yimin LU Qing WANG Chenliang WANG Yuzhu WANG Ming LU Wei ZHOU Yi LIU Xiaozhe YIN Zong WANG Zhengyi BAO Miaomiao ZHAO Yapeng ZHAO Yimeng JIAO Ufra NASEER Bin FAN Saibo LI Yang YANG John PWILSON | 2020 | Science China Earth Sciences2020，63，8： | 7 |
| 2 | A Survey of Bitmap Index Compression Algorithms for Big Data显示文摘With the growing popularity of Internet applications and the widespread use of mobile Internet, Internet traffic has maintained rapid growth over the past two decades. Internet Traffic Archival Systems(ITAS) for packets or flow records have become more and more widely used in network monitoring, network troubleshooting, and user behavior and experience analysis. Among the three key technologies in ITAS, we focus on bitmap index compression algorithm and give a detailed survey in this paper. The current state-of-the-art bitmap index encoding schemes include: BBC, WAH, PLWAH, EWAH, PWAH, CONCISE, COMPAX, VLC, DF-WAH, and VAL-WAH. Based on differences in segmentation, chunking, merge compress, and Near Identical(NI) features, we provide a thorough categorization of the state-of-the-art bitmap index compression algorithms. We also propose some new bitmap index encoding algorithms, such as SECOMPAX, ICX, MASC, and PLWAH+, and present the state diagrams for their encoding algorithms. We then evaluate their CPU and GPU implementations with a real Internet trace from CAIDA. Finally, we summarize and discuss the future direction of bitmap index compression algorithms. Beyond the application in network security and network forensic, bitmap index compression with faster bitwise-logical operations and reduced search space is widely used in analysis in genome data, geographical information system, graph databases, image retrieval, Internet of things, etc. It is expected that bitmap index compression will thrive and be prosperous again in Big Data era since 1980s. | Zhen Chen Yuhao Wen Junwei Cao Wenxun Zheng Jiahui Chang Yinjun Wu Ge Ma Mourad Hakmaoui Guodong Peng | 2015 | Tsinghua Science and Technology2015，20，1： | 5 |
| 3 | The Upstream "Strong Signals" of the Water Vapor Transport over the Tibetan Plateau during a Heavy Rainfall Event in the Yangtze River Basin显示文摘A heavy rainfall event that occurred over the middle and lower reaches of the Yangtze River Basin(YRB) during July11–13 2000 is explored in this study. The potential/stream function is used to analyze the upstream 'strong signals' of the water vapor transport in the Tibetan Plateau(TP). The studied time period covers from 2000 LST 5 July to 2000 LST 15 July(temporal resolution: 6 hours). By analyzing the three-dimensional structure of the water vapor flux, vorticity and divergence prior to and during the heavy rainfall event, the upstream 'strong signals' related to this heavy rainfall event are revealed. A strong correlation exists between the heavy rainfall event in the YRB and the convective clouds over the TP. The 'convergence zone' of the water vapor transport is also identified, based on correlation analysis of the water vapor flux two days and one day prior to, and on the day of, the heavy rainfall. And this 'convergence zone' coincides with the migration of the maximum rainfall over the YRB. This specific coupled structure actually plays a key role in generating heavy rainfall over the YRB. The eastward movement of the coupled system with a divergence/convergence center of the potential function at the upper/lower level resembles the spatiotemporal evolution of the heavy rainfall event over the YRB. These upstream 'strong signals' are clearly traced in this study through analyzing the three-dimensional structure of the potential/stream function of upstream water vapor transport. | Yang ZHAO Xiangde XU Bin CHEN Yinjun Wang | 2016 | Advances in Atmospheric Sciences2016，33，12： | 4 |
| 4 | Bridge topology optimisation with stress, displacement and frequency constraints 显示文摘 | Guan Hong Chen Yinjun | 2003 | Computers & Structures2003，8，： | 1 |
| 5 | Bridge topology optimizationwith srtess,displacement and frequency constraints显示文摘 | Guna Hong Chen Yinjun | 2003 | Computers and Structures2003，8，： | 1 |
| 6 | Updating Traditional Concept to Facilitate Agricultural Development in West China | CHEN Yinjun (Institute of Resource Division, Chinese Academy of Agriculture, Beijing 100081) | 2000 | Natural Disaster Reduction in China2000，，4： | 1 |
| 7 | NOMA-Based Spectrum Sensing for Satellite-Terrestrial Communication显示文摘With the continuous development of wireless communication technology,the number of access devices continues to soar,which poses a grate challenge to the already scarce spectrum resources.Meanwhile,6G will be an era of air-space-terrestrial-sea integration,and satellite spectrum resources are also very tight in the context of giant constellations.In this paper,we propose a Non-Orthogonal Multiple Access(NOMA)based spectrum sensing scheme for the future satellite-terrestrial communication scenarios,and design the transceiver from uplink and downlink scenarios,respectively.In order to better identify the user's transmission status,we obtain the feature values of each user through feature detection to make decision.We combine these two technologies to design the transceiver architecture and deduce the threshold value of feature detection in the satellite-terrestrial communication scenario.Simulations are performed in each scenario,and the results illustrate that the proposed scheme combining NOMA and spectrum sensing can greatly improve the throughput with a similar detection probability as Orthogonal Multiple Access(OMA). | Tianheng Xu Yinjun Xu Ting Zhou Xianfu Chen Honglin Hu | 2023 | China Communications2023，20，4： | 1 |
| 8 | Online search for UAV relay placement for free-space optical communication under shadowing显示文摘Unmanned aerial vehicle(UAV)relaying is promising to overcome the challenge of signal blockage in free-space optical(FSO)communications for users in dense urban area.Existing works on UAV relay placement are mostly based on simplified line-of-sight(LOS)channel models or probabilistic channel models,and thus fail to capture the actual LOS status of the optical communication link.By contrast,this paper studies three-dimensional(3D)online placement for a UAV to construct relay links to two ground users in deep shadow with LOS guarantees.By analyzing the properties of the UAV relay placement problem,it is found that searching on a plane that approximates the equipotential surface can achieve a good performance and complexity trade-off for a good placement of the UAV relay in 3D.Based on these insights,a two-stage online search algorithm on an equipotential plane(TOSEP)is developed for a special case where the equipotential surface turns out to be an equipotential plane.For the general case,a strategy called gradient projected online search algorithm on an approximated equipotential plane(GOSAEP)is developed,which approximates the equipotential surface with a perpendicular plane using the gradient projection method.Numerical experiments are conducted over a real-world city topology,and it is shown that the GOSAEP achieves over 95%of the performance of the exhaustive 3D search scheme within a 300-m search length. | Yuanshuai Zheng Yinjun Wang Junting Chen | 2023 | Intelligent and Converged Networks2023，4，1： | 0 |
| 9 | 中國刑法與聯合國《反腐敗公約》接軌問題显示文摘《反腐败公约》是国际反腐败和预防惩治职务犯罪的立法,其有关规定和要求需要通过各签约国在本国法律中加以规定,由签约国执法机关在本国范围内严格执行,以发挥其效能,达到预防和惩治国际腐败的目的。中国除在党的政策和一系列国家法律文件中贯彻执行《反腐败公约》的规定、履行国际反腐败义务,重点是对中国刑法有关条款作适当修改和补充或者解释,使之与《反腐败公约》的有关规定相接轨,为惩治和预防国际国内职务腐败犯罪提供法律依据。 | 周其華 Fu Yao Chen Yinjun | 2014 | 中国法律(中英文版)2014，0，6： | 0 |
| 10 | 中國法規規章備案制度的創建(下)显示文摘三、法规规章备案制度的法制化法规规章备案制度,起初是以发文件形式建立起来的,因此有必要尽快将其法制化。在总结备案制度运行初期出现的问题基础上,开始起草法规规章备案规定,以行政法规形式将备案制度法制化。(一)总结备案制度运行初期暴露出的问题。及时纠正 备案制度经过一年多的运行,无论是制度设计本身的欠缺,还是制度的执行都暴露出一些问题。 | 趙威 Fu Yao Chen Yinjun | 2014 | 中国法律(中英文版)2014，，4： | 0 |
| 11 | DDUC:an erasure-coded system with decoupled data updating and coding显示文摘In distributed storage systems,replication and erasure code(EC)are common methods for data redundancy.Compared with replication,EC has better storage efficiency,but suffers higher overhead in update.Moreover,consistency and reliability problems caused by concurrent updates bring new challenges to applications of EC.Many works focus on optimizing the EC solution,including algorithm optimization,novel data update method,and so on,but lack the solutions for consistency and reliability problems.In this paper,we introduce a storage system that decouples data updating and EC encoding,namely,decoupled data updating and coding(DDUC),and propose a data placement policy that combines replication and parity blocks.For the(N,M)EC system,the data are placed as N groups of M+1 replicas,and redundant data blocks of the same stripe are placed in the parity nodes,so that the parity nodes can autonomously perform local EC encoding.Based on the above policy,a two-phase data update method is implemented in which data are updated in replica mode in phase 1,and the EC encoding is done independently by parity nodes in phase 2.This solves the problem of data reliability degradation caused by concurrent updates while ensuring high concurrency performance.It also uses persistent memory(PMem)hardware features of the byte addressing and eight-byte atomic write to implement a lightweight logging mechanism that improves performance while ensuring data consistency.Experimental results show that the concurrent access performance of the proposed storage system is 1.70–3.73 times that of the state-of-the-art storage system Ceph,and the latency is only 3.4%–5.9%that of Ceph. | Yaofeng TU Rong XIAO Yinjun HAN Zhenghua CHEN Hao JIN Xuecheng QI Xinyuan SUN | 2023 | Frontiers of Information Technology & Electronic Engineering2023，24，5： | 0 |
| 12 | Anthropogenic influence on the extreme drought in eastern China in 2022 and its future risk显示文摘2022年夏季中国东部地区遭遇了一次持续性极端高温干旱事件.本文利用CMIP6检测归因比较计划(DAMIP)数据,量化了人为强迫对类2022年极端干旱事件发生概率的影响,并基于未来不同增暖情景试验给出了此类极端干旱事件的未来变化预估.通过分析不同外强迫因子作用下此类极端干旱事件的发生概率变化,发现人为强迫使此类极端干旱事件的发生概率提高约56%,这主要与人为强迫下中国东部平均水汽减少和平均上升运动减弱有关.进一步通过分析此类极端干旱事件对不同温室气体排放情景(SSP1-2.6,SSP2-4.5,SSP5-8.5)的响应,发现在低排放情景下类2022年极端干旱事件的发生概率较当今气候显著下降,这主要与中国东部平均水汽的增加和平均环流的变化有关,而在高排放情景(SSP5-8.5)下,此类极端干旱事件的发生概率较当今气候增加约79%,这主要与高排放情景下平均下沉运动增强有关.该研究表明,人为强迫通过调制气候平均背景场从而引起极端事件发生频次的变化是人类活动影响极端气候事件的重要途径之一,极端干旱事件对温室气体排放量的响应可能是非线性的. | Yinjun Zhang Lin Chen Yuqing Li Zi-An Ge | 2024 | Atmospheric and Oceanic Science Letters2024，17，1： | 0 |
| 13 | 香港基本法第45条解析:中央政府對香港特區行政長官任命權显示文摘根据基本法第45条,中央人民政府对香港特区行政长官的任命权是一种实质性的、独立的权力,也就是说,中央人民政府将独立决定是否对普选的当选人予以任命。中央人民政府拥有这一酌情权,而不是必须作出任命。只有对於任命权的宪制基础和性质有一个清楚的认识,我们才能准确地把握行使这一权力的标准,最终保证任命决定能够依法作出。 | 韓大元 Fu Yao Chen Yinjun | 2015 | 中国法律(中英文版)2015，0，3： | 0 |
| 14 | 法治政府建設的細節進步——對100個城市的觀察显示文摘利用评估所具有的评价和导向功能为法治政府建设提供不竭动力,已经成为理论界和实务界助推法治政府建设的不二选择。实践中,作为地方政府实施行政管理的重要抓手,行政规范性文件(以下简称规范性文件)数量较多、使用范围广泛,且具有反复适用性和普遍约束力,对老百姓权益影响较大,故对其进行有效的监督和控制,构成推进法治政府建设进程的基本内容。 | 曹鎏 Fu Yao Chen Yinjun | 2015 | 中国法律(中英文版)2015，0，3： | 0 |
| 15 | 司法公開的中國表達显示文摘2013年12月9日,最高人民法院舉行浙江法院陽光司法指数新聞發佈會,我國首部以獨立、客觀身份從審務公開、立案庭審公開、裁判文書公開等5方面對法院進行測評的報告由中國社科院法研所發佈。此前,最高人民法院已發佈《關於推進司法公開三大平臺建設的若干意見》和《關於人民法院在互聯網公佈裁判文書的規定》,要求人民法院全面推進審判流程信息公開、裁判文書公開和執行信息公開三大平臺建設。報告的公佈,《意見》和《規定》的出臺,無不顯示出中國正集中力量以司法公開推動法治中國發展。十八大以來,新一屆中央領導集體將法治建設擺在更重要的位置,更加注重發揮法治在治國理政中的重要作用。十八屆三中全會明確提出「加快建設公正高效權威的社會主義司法制度,維護人民權益」。要實現這一目標,把握司法為民公正司法這條主線,司法公開無疑是一條重要路徑。本期特選取最高人民法院司改辦劉樹德的文章,深入分析司法公開在中國的相關規範和實踐。 | 劉樹德 Fu Yao Chen Yinjun | 2013 | 中国法律(中英文版)2013，0，6： | 0 |
| 16 | Anthropogenic influence on the occurrence of extreme drought like that in eastern China in 2019显示文摘2019年夏秋季中国东部遭遇了七十年一遇的强持续性极端干旱事件.本文借助于CMIP6检测归因模式比较计划(DAMIP)数据,量化了人为强迫对类似2019年极端干旱事件发生概率的影响.通过比较不同外强迫因子作用下此类极端干旱事件的发生概率,发现人为强迫可使此类极端干旱事件的发生概率提高8倍左右.进一步研究发现人为强迫引起的海表温度增暖是经向不均匀的,对应海洋大陆附近存在一个增暖大值中心,从而增强海洋大陆地区平均上升环流,通过局地Hadley环流作用导致中国东部地区平均垂直环流出现异常下沉,最终有利于中国东部极端干旱事件发生概率增加.该研究表明,人为强迫通过调制气候平均背景场从而引起极端事件发生频次的变化是人类活动影响极端气候事件的重要途径之一. | Yuqing Li Lin Chen Yinjun Zhang Xiaojun Wei Ming Sun Zi-An Ge | 2023 | Atmospheric and Oceanic Science Letters2023，16，3： | 0 |
| 17 | Restoration of reservoir diagenesis and hydrocarbon accumulation process by calcite in-situ U-Pb dating and fluid inclusion analysis: A case study on Cretaceous Qingshuihe Formation in Gaoquan Structure, southern Junggar Basin, NW China显示文摘The complexity of diagenesis and hydrocarbon accumulation in the deep reservoirs in southern Junggar Basin restricts hydrocarbon exploration in the lower reservoir assemblage. The lithofacies and diagenesis of reservoirs in the Cretaceous Qingshuihe Formation in the Gaoquan structure of the Sikeshu Sag, southern Junggar Basin were analyzed. On this basis, the thermal history was calibrated using calcite in-situ U-Pb dating and fluid inclusion analysis to depict the hydrocarbon accumulation process in the Gaoquan structure. The results show that the Qingshuihe reservoir experienced two phases of calcite cementation and three phases of hydrocarbon charging. The calcite cements are dated to be (122.1±6.4) Ma, (14.4±1.0) Ma - (14.2±0.3) Ma. The hydrocarbon charging events occurred at around 14.2-30.0 Ma (low-mature oil), 14.2 Ma (mature oil), and 2 Ma (high-mature gas). The latter two phases of hydrocarbon charging contributed dominantly to the formation of reservoir. Due to the S-N compressive thrust activity during the late Himalayan period since 2 Ma, the traps in the Gaoquan structure were reshaped, especially the effective traps which developed in the main reservoir-forming period were decreased significantly in scale, resulting in weak hydrocarbon shows in the middle-lower part of the structure. This indicates that the effective traps in key reservoir-forming period controlled hydrocarbon enrichment and distribution in the lower reservoir assemblage. Calcite U-Pb dating combined with fluid inclusion analysis can help effectively describe the complex diagenesis and hydrocarbon accumulation process in the central-west part of the basin. | GUI Lili ZHUO Qingong LU Xuesong YANG Wenxia CHEN Weiyan WU Hai FAN Junjia HE Yinjun CAO Rizhou YU Xiaoqing | 2023 | Petroleum Exploration and Development2023，50，6： | 0 |
| 18 | Visual Detection of COVID‑19 from Materials Aspect显示文摘In the recent COVID-19 pandemic,World Health Organization emphasized that early detection is an effective strategy to reduce the spread of SARS-CoV-2 viruses.Several diagnostic methods,such as reverse transcription-polymerase chain reaction(RT-PCR)and lateral flow immunoassay(LFIA),have been applied based on the mechanism of specific recognition and binding of the probes to viruses or viral antigens.Although the remarkable progress,these methods still suffer from inadequate cellular materials or errors in the detection and sampling procedure of nasopharyngeal/oropharyngeal swab collection.Therefore,developing accurate,ultrafast,and visualized detection calls for more advanced materials and technology urgently to fight against the epidemic.In this review,we first summarize the current methodologies for SARS-CoV-2 diagnosis.Then,recent representative examples are introduced based on various output signals(e.g.,colorimetric,fluorometric,electronic,acoustic).Finally,we discuss the limitations of the methods and provide our perspectives on priorities for future test development. | Gang Wang Le Wang Zheyi Meng Xiaolong Su Chao Jia Xiaolan Qiao Shaowu Pan Yinjun Chen Yanhua Cheng Meifang Zhu | 2022 | Advanced Fiber Materials2022，4，6： | 0 |
| 19 | 中國刑事法律援助制度的發展與前瞻显示文摘在中国法律体系中,法律援助制度既是贯彻“法律面前人人平等”这一宪法原则的重要制度保障,同时也是民生领域中一顼旨在保障社会弱势群体“获得必要的法律服务”的社会公益事业。 | 吳宏耀 Fu yao Chen Yinjun | 2015 | 中国法律(中英文版)2015，0，4： | 0 |
| 20 | COMBAT:A New Bitmap Index Coding Algorithm for Big Data显示文摘Bitmap indexing has been widely used in various applications due to its speed in bitwise operations.However,it can consume large amounts of memory.To solve this problem,various bitmap coding algorithms have been proposed.In this paper,we present COMbining Binary And Ternary encoding(COMBAT),a new bitmap index coding algorithm.Typical algorithms derived from Word Aligned Hybrid(WAH)are COMPressed Adaptive inde X(COMPAX)and Compressed'n'Composable Integer Set(CONCISE),which can combine either two or three continuous words after WAH encoding.COMBAT combines both mechanisms and results in more compact bitmap indexes.Moreover,querying time of COMBAT can be faster than that of COMPAX and CONCISE,since bitmap indexes are smaller and it would take less time to load them into memory.To prove the advantages of COMBAT,we extend a theoretical analysis model proposed by our group,which is composed of the analysis of various possible bitmap indexes.Some experimental results based on real data are also provided,which show COMBAT’s storage and speed superiority.Our results demonstrate the advantages of COMBAT and codeword statistics are provided to solidify the proof. | Yinjun Wu Zhen Chen Yuhao Wen Wenxun Zheng Junwei Cao | 2016 | Tsinghua Science and Technology2016，21，2： | 0 |
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