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20篇 您的检索式:作者名="Jiguang Cheng"
    题名 作者 年代 出处 被引量
1Reaction decoupling in thermochemical fuel conversion and technical progress based on decoupling using fluidized bed显示文摘Thermochemical conversion of fuels via pyrolysis/carbonization,cracking,gasification and combustion has to involve a number of individual reactions called attribution reactions to form an intercorrelated reaction network for any conversion process.By separating one or some attribution reactions from the others to decouple their interactions existing in the reaction network,the so-called reaction decoupling enables a better understanding of the complex thermal conversion process and further the optimization of the conditions for attribution reactions as well as the entire conversion process to realize advanced performances.The dual bed conversion and two-stage conversion are the two representative types of fuel conversion technologies developed in recent years based on reaction decoupling.Many technical advantages have been proven for such decoupling fuel conversion technologies,such as poly-generation of products,low-cost production of high-grade products,elimination of undesirable products or pollutants,easy operation and control,and so on.The treated fuels with decoupling conversion technologies mainly include solid biomass and coal,as well as liquid petroleum oil.This paper is devoted to reiteration of the reaction decoupling concept and further to reviewing the research,developments and successful applications of several decoupling fuel conversion technologies of two such types by using fluidized bed as their major reactors.Zhennan Han Sulong Geng Xi Zeng Shipei Xu a Ping An Jiguang Cheng Jun Yang Feng Li Suyi Zhang Miao Liu Guoqing Guan Guangwen Xu 2018Carbon Resources Conversion2018,1,2:8
2Pyrolysis characteristics of waste tire particles in fixed-bed reactor with internals显示文摘This study investigated the characteristics of pyrolysis for waste tire particles in the newly developed fixed-bed reactor with internals that are a central gas collection channel mounted inside reactor.And a few metallic plates vertically welded on the internal wall of the reactors and extending to the region closing their central gas collection pipe walls.Experiments were conducted in two laboratory fixed bed reactors with or without the internals.The results shown that employing internals produced more light oil at externally heating temperatures above 700℃due to the inhibited secondary reactions in the reactor.The oil from the reactor with internals contained more aliphatic hydrocarbons and fewer aromatic hydrocarbons,leading to its higher H/C atomic ratios as for crude petroleum oil.The char yield was relatively stable for two beds and showed the higher heating values(HHVs)of about 23 MJ/kg.The gaseous product of pyrolysis mainly consisted of H2 and CH4,but the use of internals led to less pyrolysis gas through its promotion of oil production.Shipei Xu Dengguo Lai Xi Zeng Lijuan Zhang Zhennan Han Jiguang Cheng Rongcheng Wu Ondřej Mašek Guangwen Xu 2018Carbon Resources Conversion2018,1,3:3
3P2P traffic optimization显示文摘Peer-to-peer (P2P) based content distribution systems have emerged as the main form for content distribution on the Internet,which can greatly reduce the distribution cost of content providers and improve the overall system scalability.However,the mismatch between the overlay and underlay networks causes large volume of redundant traffic,which intensifies the tension between P2P content providers and ISPs.Therefore,how to efficiently use network resources to reduce the traffic burden on the ISPs is crucial for the sustainable development of P2P systems.This paper surveys the state-of-art P2P traffic optimization technologies from three perspectives:P2P cache,locality-awareness and data scheduling.Technological details,comparison between these technologies and their applicabilities are presented,followed by a discussion of the issues that remain to be addressed and the direction of future content distribution research.ZHANG GuoQiang TANG MingDong CHENG SuQi ZHANG GuoQing SONG HaiBin CAO JiGuang YANG Jing 2012Science China(Information Sciences)2012,55,7:2
4Threshold selection based on fuzzy c partition entropy approach 显示文摘Cheng H D Chen J R Li Jiguang 1998Attem Recognition1998,31,7:1
5Threshold selection based on fuzzy c _ partition entropy approach显示文摘Cheng H D Chen J R Li Jiguang 1998Pattern Recognition1998,31,7:1
6Energy-saving strategy for a transport bed flash calcination process applied to magnesite显示文摘A transport bed flash calcination(TBFC)process applied to magnesite is systematically investigated through process simulation to optimize the energy-saving strategy.The high-temperature calciner flue gas is used to preheat the fed magnesite,while the sensible heat with the caustic calcined magnesia(CCM)product is cooled by air sent to the calciner.Pre-decomposition of magnesite during preheating is considered on basis of the kinetics measured using a micro fluidized bed reaction analyzer that allows the minimized effect of external diffusion on reaction.With staged fuel gas supply the TBFC process allows the equivalence ratios around 1.2 for combustion.The preferred arrangement of stages for magnesite preheating and CCM cooling are respectively 4 and 2,leading to the energy consumption of 4100 kJ/kg-CCM and the energy efficiency of 66.8%,which is almost doubly higher than the 33.9%of the conventional reverberatory furnaces(RF).The pre-decomposition occurs mainly in the 1st-stage preheater,and the maximal conversion is about 13%.Varying the stages of preheating appears more influential on the energy saving than varying the cooling stages,while residence time above 1 s in the preheaters has limited effect.Ping An Zhennan Han Kangjun Wang Jiguang Cheng Zhongkai Zhao Yohanes Andre Situmorang Jenny Rizkiana Abuliti Abudula Guoqing Guan 2021Carbon Resources Conversion2021,4,1:1
7Threshold selection based on fuzzy c partition entropy approach显示文摘H D Cheng J R Chen Li Jiguang 1998attern Recognition1998,31,7:1
8Threshold selection based on fuzzy c-partition entropy approach显示文摘Cheng H D Chen J R Li jiguang 1998Pattern Recognition1998,31,7:1
9Ambulatory blood pressure monitoring for the management of hypertension显示文摘Ambulatory blood pressure monitoring(ABPM)has become indispensable in the current management of hypertension.ABPM is particularly useful in the accurate diagnosis of hypertension.Its diagnostic thresholds had been recently established based on hard clinical outcomes.Cross-classification of patients according to office and ambulatory blood pressure identifies white-coat,masked,and sustained hypertension.ABPM is also useful in cardiovascular(CV)risk assessment.It provides information on daytime and nighttime blood pressure and circadian rhythm,particularly nighttime blood pressure dipping.Nighttime blood pressure is predictive of CV risk independent of office and daytime blood pressure.Isolated nocturnal hypertension is a special form of masked hypertension,with normal daytime but elevated nocturnal blood pressure.It also helps in the evaluation of blood pressure fluctuation and variation,such as morning blood pressure surge and reading-to-reading blood pressure variability.ABPM may derive several other indexes,such as ambulatory blood pressure index and salt sensitivity index,which may be useful in CV evaluations.Yibang Cheng Yan Li Jiguang Wang 2022Chinese Medical Journal2022,,9:1
10Threshokt selection based oll Fuzzy c-Partition entropy approach显示文摘Cheng HD Chen JR Li JiGuang 1908Pattern Recognition1908,31,7:1
11Threshold selection based on fuzzy c-partition entropy approach显示文摘Cheng H D Chen J R Li Jiguang 1998Pattern Recognition1998,31,7:1
12Threshold Selection Based on Fuzzy c - partition Entropy Approach 显示文摘Cheng H D Chen J R Li Jiguang 1998Pattern Recognition1998,31,7:1
13Threshold selection based on fuzzy c-partition entropy approach显示文摘CHENG H D CHEN J R LI JIGUANG 1998Pattern Recognition1998,31,7:1
14Threshold selection based on fuzzy c -partition entropy approach显示文摘H.D. Cheng Jim-Rong Chen Jiguang Li 1998Pattern Recognition1998,,7:1
15Threshold selection based on fuzzy c-partition entropy approach显示文摘Cheng H D Chen J R Li Jiguang 1998Pattern Recognition1998,31,7:1
16Threshold selection based on fuzzy c-partition entropy approach显示文摘Cheng H D Chen J R Li Jiguang 1998Pattern Recognition1998,31,7:1
17Threshold selectionbased on fuzzy c-partition entropy approach 显示文摘CHENG H D CHEN J R LI Jiguang 1998PatternRecognition1998,31,7:1
18Threshold Selection Based on Fuzzy Cpartition Entropy App Roach显示文摘Cheng H D Chen J R Li Jiguang 1998Pat Tern Recognition1998,31,7:1
19Was Wuhan the early epicenter of the COVID-19 pandemic?——a critique显示文摘Recently, Worobey et al.(2022) published a report entitled ‘The Huanan Seafood Wholesale Market in Wuhan was the early epicenter of the COVID-19 pandemic' that succinctly summarizes their study [1]. A pre-print version of this study had earlier elicited a series of highprofile media coverages [2,3]. All these reports deliver a social-political message that the Huanan market is the epicenter of COVID-19.Yanan Cao Lingling Chen Hua Chen Yupeng Cun Xiaofeng Dai Hongli Du Feng Gao Fengbiao Guo Yalong Guo Pei Hao Shunmin He Shunping He XiongLei He Zheng Hu Boon-Peng Hoh Xin Jin Qian Jiang Qinghua Jiang Asifullah Khan Hong-Zhi Kong Jinchen Li Shuai Cheng Li Ying Li Qiang Lin Jianquan Liu Qi Liu Jian Lu Xuemei Lu Shujin Luo Qinghua Nie Zilong Qiu Tieliu Shi Xiaofeng Song Jianzhong Su Sheng-ce Tao Chaolong Wang Chuan-Chao Wang Guo-Dong Wang Jiguang Wang Qi Wu Shaoyuan Wu Shuhua Xu Yu Xue Wenjun Yang Zhaohui Yang Kai Ye Yuan-Nong Ye Li Yu Fangqing Zhao Yiqiang Zhao Weiwei Zhai Dandan Zhang Liye Zhang Houfeng Zheng Qi Zhou Tianqi Zhu Ya-ping Zhang 2023National Science Review2023,10,4:0
20Application of Submerged Ultrafiltration in Pretreatment of Flue Gas Desulfurization Wastewater显示文摘Nowadays,the zero liquid discharge of flue gas desulfurization(FGD)wastewater from coal-fired units has attracted the attention of all countries in the world.The pretreatment methods generally have the problems of high operation cost,small treatment capacity,and poor flexibility.However,the membrane method can avoid the above problems.In the current research,it has not been found that someone directly uses submerged ultrafiltration to pretreat FGD wastewater.Therefore,this paper innovatively proposed to directly use ceramic ultrafiltration membrane to treat FGD wastewater,which can ensure effluent quality and improve the flexibility of the pretreatment system.In this paper,the performance of submerged ultrafiltration membrane for the filtration of FGD wastewater from a power plant was studied to optimize the filtration performance and improve the effluent quality.The effects of operating parameters such as membrane permeate flux,aeration rate and filtration/backwashing time combination on the membrane performance were studied.The results showed that when the filtration/backwashing time combination was 15 min/30 s,with the increased in permeate flux from 55 L/(m2·h)to 100 L/(m2·h),the steady transmembrane pressure(TMP)increased from 39 kPa to 70 kPa,and the fouling rate increased significantly from 4.5 kPa/h to 7.3 kPa/h;When the aeration rate increased from 10 m3/(m2·h)to 30 m3/(m2·h),the membrane pollution was much reduced.Excessive aeration rate cannot further alleviate the membrane pollution,but also brought greater energy consumption;Increasing backwashing time can effectively inhibit the formation of gel layer on the surface of the membrane and prolong the initial stage of low-pressure operation;The rejection of suspended solids(SS)and turbidity of the equipment studied in this paper can reach more than 99%under various working conditions,which can satisfy the water quality requirements of the subsequent steps.The submerged ultrafiltration membrane was suitable for the pretreatment of FGD wastewater because it can ensure the quality of permeate under the premise of long-term operation.Jiageng Zhang Zhengfeng Wang Jiguang Huang Chao Cheng Heng Zhang Dan Gao 2022Energy Engineering2022,119,6:0
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