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Chinese Journal of Polymer Science 2024年第7期42卷 897-906,I0005页

作者： Shuang-Shuang Wang Dian-Ying Feng Zhi-Ming Zhang Xia liu Kun-Peng Ruan Yong-qiang guo Jun-Wei Gu Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an710072China Shandong Institute of Nonmetallic Materials Jinan250031China Queen Mary University of London Engineering School Northwestern Polytechnical UniversityXi’an710072China

Constructing controllable thermal conduction networks is the key to efficiently improve thermal conductivities of polymer *** this work,graphite oxide(GO)and functionalized carbon nanotubes(f-CNTs)are combined to prepare“line-Plane”-like hetero-structured thermally conductive GO@f-CNTs fillers,which are then performed to construct controllable 3D GO@f-CNTs thermal conduction networks via selfsacrificing template method based on oxalic ***,thermally conductive GO@f-CNTs/polydimethylsiloxane(PDMS)composites are fabricated via casting *** the size of oxalic acid is 0.24 mm and the volume fraction of GO@f-CNTs is 60 vol%,GO@f-CNTs/PDMS composites present the optimal thermal conductivity coefficient(λ,4.00 W·m^(-1)·K^(-1)),about 20 times that of theλof neat PDMS(0.20 W·m^(-1)·K^(-1)),also much higher than theλ(2.44 W·m^(-1)·K^(-1))of GO/f-CNTs/PDMS composites with the same amount of randomly dispersed ***,the obtained GO@f-CNTs/PDMS composites have excellent thermal stability,whoseλdeviation is only about 3%after 500 thermal cycles(20-200℃).

关键词： Polydimethylsiloxane Hetero-structured thermally conductive fillers Self-sacrificing template Thermal conduction networks

Genetic diversity in centipedegrass[Eremochloa ophiuroides(Munro)Hack.]

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Horticulture Research 2020年第1期7卷 2658-2666页

作者： Jianjian li Hailin guo Junqin Zong Jingbo Chen Dandan li Jianxiu liu The National Forestry and Grassland Administration Engineering Research Center for Germplasm Innovation and Utilization of Warm-season Turfgrasses Institute of BotanyJiangsu Province and Chinese Academy of SciencesNanjing Botanical GardenMem.Sun Yat-Sen210014 NanjingJiangsuChina The Jiangsu Provincial Engineering and Technology Research Center for Turf Germplasm Improvement and Breeding Institute of BotanyJiangsu Province and Chinese Academy of SciencesNanjing Botanical GardenMem.Sun Yat-Sen210014 NanjingJiangsuChina

Genetic diversity is the heritable variation within and among populations,and in the context of this paper describes the heritable variation among the germplasm resources of *** is an important warmseason perennial C4 grass belonging to the Poaceae family in the subfamily Panicoideae and genus *** is the only species cultivated for turf among the eight species in *** center of origin for this species is southern to central *** centipedegrass is an excellent lawn grass and is most widely used in the southeastern United States,China has the largest reserve of centipedegrass germplasm in the ***,the gene bank in China holds~200 centipedegrass accessions collected from geographical regions that are diverse in terms of climate and *** collection appears to have broad variability with regard to morphological and physiological *** efficiently develop new centipedegrass varieties and improve cultivated species by fully utilizing this variability,multiple approaches have been implemented in recent years to detect the extent of variation and to unravel the patterns of genetic diversity among centipedegrass *** this review,we briefly summarize research progress in investigating the diversity of centipedegrass using morphological,physiological,cytological,and molecular biological approaches,and present the current status of genomic studies in *** on future research on genetics and genomics and modern breeding of centipedegrass are also discussed.

关键词： cultivated germplasm breeding

Radio-frequency design of a new C-band variable power splitter

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Nuclear Science and Techniques 2019年第6期30卷 122-128页

作者： Zong-Bin li Alexej Grudiev Wen-Cheng Fang qiang Gu Zhen-Tang Zhao Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049 China European Organization for Nuclear Research 1211 Geneva Switzerland

A novel variable C-band radio-frequency (RF) power splitter was designed at Shanghai Institute of Applied Physics, Chinese Academy of Sciences. Using three RF impedance combiners, an H-bend, and an RF polarizer, this new power splitter is much more compact than a traditionally designed splitter, which comprises three 3-dB hybrids. The parameters were optimized to achieve good matching and minimize reflection. Here, the RF design of the new C-band variable power splitter is presented.

关键词： Power splitter Variable Polarizer Compact

Activation of three natural product biosynthetic gene clusters from Streptomyces lavendulae CGMCC 4.1386 by a reporter-guided strategy

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Synthetic and Systems Biotechnology 2018年第4期3卷 254-260页

作者： Pengwei li Zhengyan guo Wei Tang Yihua Chen State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing100101China University of Chinese Academy of Sciences Beijing100049China

Along with the fast developing of DNA sequencing technology,a great number of natural product biosynthetic gene clusters have been discovered by bioinformatic analysis,which demands novel high-throughput genome mining methods to obtain the diverse compounds dictated by those gene *** this work,a method based on the reporter gene xylE was established to screen for the activation conditions of thirteen different gene clusters from Streptomyces lavendulae CGMCC *** this reporter-guided method,the key structure gene was replaced by a xylE-kanaR cassette with the xylE gene being controlled by the transcription and translation machinery of the key structure *** not only facilitated the screening of activation conditions,but also provided the null mutants of specific natural product gene clusters as controls to link those clusters with their products *** potential activation conditions of eleven gene clusters from *** CGMCC 4.1386 were *** addition,activation of three of the eleven gene clusters was confirmed and their products were identified.

关键词： Natural product Genome mining Streptomyces Reporter

Negativity of Wigner function and phase sensitivity of an SU(1,1) interferometer

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Chinese Physics B 2019年第6期28卷 121-125页

作者： Chun-li liu li-li guo Zhi-Ming Zhang Ya-Fei Yu Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices School of Information and Optoelectronic Science and EngineeringGuangdong Provincial Key Laboratory of Quantum Engineering and Quantum MaterialsSouth China Normal UniversityGuangzhou 510006China

Both the negativity of Wigner function and the phase sensitivity of an SU(1,1) interferometer are investigated in this paper. In the case that the even coherent state and squeezed vacuum state are input into the interferometer, the Heisenberg limit can be approached with parity detection. At the same time, the negativity volume of Wigner function of detection mode comes entirely from the input state and varies periodically with the encoding phase. In addition, the negativity volume of Wigner function is positively correlated with the phase sensitivity of the SU(1,1) interferometer. The positive correlation may mean that the non-classicality indicated by negative Wigner function is a kind of resource that can verify some related research results of phase estimation.

关键词： SU(1,1) interferometer Wigner function phase sensitivity

Research progress on synthesis of zeolites from coal fly ash and environmental applications

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Frontiers of Environmental Science & Engineering 2023年第12期17卷 85-108页

作者： Xingyue Chen Peng Zhang Yang Wang Wei Peng Zhifeng Ren Yihong li Baoshuai Chu qiang Zhu College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Australia Institute for Innovative Materials University of WollongongWollongongNSW2500Australia

The by-product of coal combustion,coal fly ash(CFA),has become one of the world’s most emitted solid wastes,and bulk utilization while achieving high value-added products is the focus of current *** CFA to prepare zeolite cannot only reduce environmental pressure,but also obtain high value-added products,which has a good market *** this paper,the research progress of hydrothermal synthesis method of CFA zeolites is reviewed in detail and summarized several other synthetic methods of CFA *** review also presents an overview of CFA zeolites application in environmental applications like water treatment,gas adsorption and soil ***,a considerable number of literature data have documented using CFA zeolites for water treatment,whereas research on CFA zeolites application to gas adsorption and soil remediation is still *** addition,the current status of basic research on the industrial production of CFA zeolites is briefly summarized,and the development trend of the synthetic zeolite of CFA is *** the feasibility analysis of the industrial production of CFA zeolite,it is concluded that the only two methods with high feasibility for industrial application are two-step hydrothermal and alkali melting methods,and the industrial production technology still needs to be studied in depth.

关键词： Coal fly ash Zeolite Synthetic method Environmental application Industrialization

Standard friction prediction model of long-distance hot oil pipelines

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Petroleum Science 2020年第2期17卷 487-498页

作者： Tao Yu Chuan-xian li Bo Yao Zhi-jun Zhang Yi guo li-jun liu College of Pipeline and Civil Engineering Shandong Provincial Key Laboratory of Oil&Gas Storage and Transportation SafetyChina University of Petroleum(East China)Qingdao 266580ShandongChina Petrochina Oil and Gas Pipeline Control Center Beijing 100007China Richfit Information Technology Co.Ltd Beijing 100007China

We developed a predictive model for the pipeline friction in the 520-730 m^3/h transmission range using the multi-layerperceptron-back-propagation(MLP-BP)method and analyzing the unit friction data after the pigging of a hot oil *** view of the shortcomings of the MLP-BP model,two optimization methods,the genetic algorithm(GA)and mind evolutionary algorithm(MEA),were used to optimize the MLP-BP *** research results were applied to the standard friction prediction of three sections of a hot oil *** the GA and MEA optimizations,the average errors of the three sections were 0.0041 MPa for the GA and 0.0012 MPa for the MEA,and the mean-square errors were 0.083 and 0.067,*** MEA-BP model prediction results were characterized by high precision and small *** MEABP prediction model was applied to the analysis of the wax formation 60 and 90 days after *** analysis results showed that the model can effectively guide pipe pigging and *** was little sample data for the individual transmission and oil temperature steps because the model was based on actual production data modeling and analysis,which may have affected the accuracy and adaptability of the model.

关键词： Hot oil pipeline Friction MLP-BP GA MEA

Permeability and heterogeneity adaptability of surfactant-alternating-gas foam for recovering oil from low-permeability reservoirs

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Petroleum Science 2022年第3期19卷 1185-1197页

作者： Ming-Chen Ding qiang li Yu-Jing Yuan Ye-Fei Wang Ning Zhao Yu-Gui Han School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongP.R.China Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)) Ministry of EducationQingdao266580ShandongP.R.China Research Institute of Petroleum Engineering Technology Shengli Oilfield CompanyDongying257000ShandongP.R.China Bohai Oilfield Research Institute Tianjin Branch of CNOOC Ltd.Tianjin300450P.R.China

As the traditional polymer stabilizer is eliminated to improve the injectability of foam in lowpermeability reservoirs,the stability,plugging capacity,conformance control and oil recovery performance of the surfactant-alternating-gas(SAG)foam become significantly important for determining its adaptability to permeability and heterogeneity,which were focused and experimentally researched in this *** show that the SAG bubbles are highly stable in micron-sized channels and porous media(than in the conventional unconstrained graduated cylinder),making it possible to use in enhanced oil recovery(EOR).Such bubbles formed in porous media could be passively adjusted to match their diameter with the size of the *** endows the SAG foam with underlying excellent injectability and deep migration *** adaptability results indicate a reduced plugging capacity,but,increased incremental oil recovery by the SAG foam with decreased *** makes it a good candidate for EOR over a wide range of permeability,however,parallel core floods demonstrate that there is a limiting heterogeneity for SAG application,which is determined to be a permeability contrast of 12.0(for a reservoir containing oil of 9.9 m Pa s).Beyond this limit,the foam would become ineffective.

关键词： SAG foam EOR Low-permeability reservoir Permeability Heterogeneity

Quantum computation on gate-defined semiconductor quantum dots

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Chinese Science Bulletin 2012年第16期57卷 1919-1924页

作者： li HaiOu YAO Bing TU Tao guo guoPing Key Laboratory of Quantum Information Chinese Academy of SciencesUniversity of Science and Technology of China Hefei 230026 China

During the past few years, researchers have made significant progress on quantum information processing in gate controlled semiconductor quantum dots. We review the global research efforts, including works by our grou... 详细信息

关键词：半导体量子点量子计算定义量子信息处理研究人员

Boosting oxygen reduction activity and CO_(2) resistance on bismuth ferrite-based perovskite cathode for low-temperature solid oxide fuel cells below 600℃

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Journal of Energy Chemistry 2024年第3期90卷 600-609,I0013页

作者： Juntao Gao Zhiyun Wei Mengke Yuan Zhe Wang Zhe Lü qiang li lingling Xu Bo Wei School of Physics Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080HeilongjiangChina School of Physics and Electronic Engineering Harbin Normal UniversityHarbin 150025HeilongjiangChina

Developing efficient and stable cathodes for low-temperature solid oxide fuel cells(LT-SOFCs) is of great importance for the practical ***,we propose a series of Sm-modified Bi_(0.7-x)Sm_xSr_(0.3)FeO_(3-δ) perovskites as highly-active catalysts for *** doping can significantly enhance the electrocata lytic activity and chemical stability of *** 600℃,Bi_(0.675)Sm_(0.025)Sr_(0.3)FeO_(3-δ)(BSSF25) cathode has been found to be the optimum composition with a polarization resistance of 0.098 Ω cm^2,which is only around 22.8% of Bi_(0.7)Sr_(0.3)FeO_(3-δ)(BSF).A full cell utilizing BSSF25 displays an exceptional output density of 790 mW cm^(-2),which can operate continuously over100 h without obvious *** remarkable electrochemical performance observed can be attributed to the improved O_(2) transport kinetics,superior surface oxygen adsorption capacity,as well as O_(2)p band centers in close proximity to the Fermi ***,larger average bonding energy(ABE) and the presence of highly acidic Bi,Sm,and Fe ions restrict the adsorption of CO_(2) on the cathode surface,resulting in excellent CO_(2) *** work provides valuable guidance for systematic design of efficient and durable catalysts for LT-SOFCs.

关键词： Low-temperature solid oxide fuel cell Perovskite cathode DFT calculations CO_(2) tolerance