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Stolarsky平均的几个注记

上海理工大学学报 2005年第5期27卷 406-408页

作者：贾高上海理工大学理学院上海200093

设Da,b(x,y)表示关于两个正数x和y的Stolarsky平均,其中,a和b是两个正参数.本文给出了几个关于Da,b(x,y)的注记和对数平均、Heronian平均及幂平均的几个不等式.

关键词： Stolarsky平均对数平均 Heronian平均幂平均

Photo-promoted carbonylation of chloroalkanes with carbon monoxide by non-precious metal catalysts

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Chinese Chemical Letters 2007年第7期18卷 795-798页

作者： Hong Wei Wang Ying Ping jia Da Bin gao Jing Mei Yin Guang-Yun-Zhou Shen Min Li Liaoning Key Laboratory of Bio-Organic Chemistry Dalian University Dalian 116622 China

The photo-promoted carbonylation of chloroalkanes with carbon monoxide was carried out under ambient conditions with copper and cadmium salts catalysts. The results indicated that the corresponding esters were produced with three salt catalysts, ***2, CuCl2 and CdI2. Among these catalysts, CdI2 was the most efficient in terms of ester yield and selectivity, particularly, 60% yield and 75% selectivity in the carbonylation of chlorocyclohexane were achieved. Furthermore, the yield and selectivity of the ester can be improved greatly by adding tri-n-butylamine in the CuBr2 and CuCl2 catalyst systems. On the other hand, the additive. As a result, we suggest that iodide ion plays an important role in the catalyst system of the cadmium salts.

关键词： Cadmium salts Copper salts Chloroalkanes Photo-promoted carbonylation

Impact of volcanism on the formation and hydrocarbon generation of organic-rich shale in the Jiyang Depression, Bohai Bay Basin, China

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Petroleum Science 2024年第3期21卷 1539-1551页

作者： jia-Hong gao Xin-Ping Liang Zhi-Jun Jin Quan-You Liu Chang-Rong Li Xiao-Wei Huang Ju-Ye Shi Peng Li State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development Institute of EnergyPeking University Petroleum Exploration and Production Research Institute SINOPECBeijing100871 China School of Energy Resources China University of Geosciences Beijing100083 China

Globally,most organic-rich shales are deposited with volcanic ash *** ash,a source for many sedimentary basins,can affect the sedimentary water environment,alter the primary productivity,and preserve the organic matter(OM)through physical,chemical,and biological *** an increasing number of breakthroughs in shale oil exploration in the Bohai Bay Basin in recent years,less attention has been paid to the crucial role of volcanic impact especially its influence on the OM enrichment and hydrocarbon ***,we studied the petrology,mineralogy,and geochemical characteristics of the organic-rich shale in the upper submember of the fourth member(Es_(4)^(1))and the lower submember of the third member(Es_(3)^(3))of the Shahejie Formation,aiming to better understand the volcanic impact on organic-rich shale *** results show that total organic carbon is higher in the upper shale intervals rich in volcanic ash with enriched light rare earth elements and moderate Eu *** indicates that volcanism promoted OM formation before or after the *** positive correlation between Eu/Eu*and Post-Archean Australian Shale indicates hydrothermal activity before the volcanic *** plane graph of the hydrocarbon-generating intensity(S1+S2)suggests that the heat released by volcanism promoted hydrocarbon ***,the nutrients carried by volcanic ash promoted biological blooms during Es_(4)^(1 )and Es_(3)^(3) deposition,yielding a high primary *** blooms consume large amounts of oxygen and form anoxic environments conducive to the burial and preservation of ***,this study helps to further understand the organic-inorganic interactions caused by typical geological events and provides a guide for the next step of shale oil exploration and development in other lacustrine basins in China.

关键词： Volcanic ash Hydrocarbon generation Organic-rich shale Shahejie Formation Jiyang Depression

High cycle rotating bending fatigue performance and fracture behavior in a pearlite-ferrite dual-phase steel

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Journal of Iron and Steel Research International 2022年第3期29卷 519-528页

作者： Xin-bo Ji Si-xin Zhao Li-ming Fu jian Peng jia-qiang gao Da-jiang Yu Zong-ze Huang Ai-dang Shan School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai200240China Baosteel Research Institute Baoshan Iron and Steel Co.Ltd.Shanghai201900China

To clarify the effects of ferrite morphologies and contents on high-cycle fatigue property of pearlite-ferrite dual-phase(DP)steel used for fabrication of commercial vehicle crankshafts,two types of DP steels with different ferrite grain sizes(S10:13.1μm and S30:21.4μm)and ferrite contents(S10:~9.5 vol.%and S30:~30.4 vol.%)were *** amplitude-logarithm of number of high cycles to failure fatigue of the two DP steels was *** results showed a fatigue strength of 510 and 400 MPa for S10 and S30 steels,respectively,at 10^(7) *** cracks in S10 steel extended preferentially along the grain boundary,but it was easy for crack propagation to extend within a pearlite colony to form a zigzag crack *** roughness was enhanced and high stress was introduced to the crack surface due to this kind of crack propagation behavior,which has positive effects on slowing down crack ***,the crack propagation in S30 steel mainly occurred inside the soft equiaxed coarse ferrite *** revealed that little stress was introduced to the crack *** results show that it is possible to improve high cycle fatigue strength of pearlite-ferrite DP steel by appropriately manipulating the volume fraction and microstructure morphology of ferrite phase.

关键词： Pearlite-ferrite steel Ferrite morphology Ferrite content Fatigue perfomance Fracture characteristics

Efficient ion acceleration driven by a Laguerre–Gaussian laser in near-critical-density plasma

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Chinese Physics B 2023年第10期32卷 542-547页

作者：高嘉祥刘梦王伟民 Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials and Micronano Devices Renmin University of ChinaBeijing 100872China Department of Mathematics and Physics North China Electric Power UniversityBaoding 071003China Key Laboratory of Quantum State Construction and Manipulation Renmin University of ChinaBeijing 100872China IFSA Collaborative Innovation Center Shanghai Jiao Tong UniversityShanghai 200240China

Laser-driven ion accelerators have the advantages of compact size,high density,and short bunch duration over conventional ***,it is still challenging to generate ion beams with quasi-monoenergetic peak and low divergence in experiments with the current ultrahigh intensity laser and thin target *** we propose a scheme that a Laguerre–Gaussian laser irradiates a near-critical-density(NCD)plasma to generate a quasi-monoenergetic and low-divergence proton *** Laguerre–Gaussian laser pulse in an NCD plasma excites a moving longitudinal electrostatic field with a large amplitude,and it maintains the inward bowl-shape for dozens of laser *** special distribution of the longitudinal electrostatic field can simultaneously accelerate and converge the *** particle-in-cell(PIC)simulation shows that the efficient proton acceleration can be realized with the Laguerre–Gaussian laser intensity ranging from 3.9×10^(21)W·cm^(-2)–1.6×10^(22)W·cm^(-2)available in the near future,e.g.,a quasi-monoenergetic proton beam with peak energy~115 MeV and divergence angles less than 5°can be generated by a 5.3×10^(21)W·cm^(-2)*** work could provide a reference for the high-quality ion beam generation with PWclass laser systems available recently.

关键词： Laguerre–Gaussian laser laser-driven ion acceleration particle-in-cell simulations near-critical-density plasma

Seattle stormwatermanagement practice inspired for the development of spongecity

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西部人居环境学刊 2016年第S1期 65-70页

作者： Yuncai Wang jia gao College of Architecture and Urban Planning Tongji University

In recent years,it is obvious that many cities in China are faced with floods and severe water shortages problems,with the development of increasing urbanization and increased impervious *** order to solve these problems,Chinese government releases the methodof sponge city construction in the policy guidelines of"Technology Guidance of Sponge City Construction".This paper aims to summarize the stormwater management ideas,guidance and control mechanisms of administrative and engineering measures by analyzing the development from traditional drainage to sustainable drainage system of Seattle stormwater *** doing so,we could make better decision in the planning system,implementation process and multidisciplinary integration of Chinese stormwater management,and provide suitable ideas and methods for Chinese sponge city construction.

关键词： Stormwater management system Sponge city Seattle Guidance

Existence and Multiplicity of Solutions for Quasilinear p(x)-Laplacian Equations in R<sup>N</sup>

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Journal of Applied Mathematics and Physics 2015年第10期3卷 1270-1281页

作者： Honghong Qi gao jia College of Science University of Shanghai for Science and Technology Shanghai China

We establish some results on the existence of multiple nontrivial solutions for a class of p(x)-Lap-lacian elliptic equations without assumptions that the domain is bounded. The main tools used in the proof are the variable exponent theory of generalized Lebesgue-Sobolev spaces, variational methods and a variant of the Mountain Pass Lemma.

关键词： p(x)-Laplacian Operator Generalized Lebesgue-Sobolev Spaces Variational Method Multiple Solutions

Synthesis and Characterization of Novel Orange-emitting Iridium(III) Complexes with Diphenylquinoline Ligands Containing Fluorinated Substituent

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Chinese Chemical Letters 2006年第3期17卷 411-414页

作者： Xiao Wei ZHANG Chu Luo YANG Zhong An LI Lin Na ZHU Jin Gui QIN jia gao Dong Ge MA Department of Chemistry Key Lab on Organic and Polymeric Opto-electronic Materials Wuhan University Wuhan 430072 State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022

Three new cyclometalated iridium（m） complexes based on ligands of diphenylquinoline with fluorinated subsfituents were prepared, and characterized by elemental analysis （EA）, ^1H NMR, and mass spectroscopy （MS）.... 详细信息

关键词： Iridium complexes phenylquinoline photoluminescence electrophosphorescence

The bZIP transcription factor ATF1 regulates blue light and oxidative stress responses in Trichoderma guizhouense

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mLife 2023年第4期2卷 365-377页

作者： Yifan Li Yanshen Li Huanhong Lu Tingting Sun jia gao jian Zhang Qirong Shen Zhenzhong Yu Nanjing Agricultural University Jiangsu Provincial Key Lab for Organic Solid Waste UtilizationNational Engineering Research Center for Organic-based FertilizersJiangsu Collaborative Innovation Center for Solid Organic Waste Resource UtilizationAgricultural Microbial Resources Protection and Germplasm Innovation and Utilization Center of Jiangsu ProvinceNanjingChina Department of Microbiology Karlsruhe Institute of Technology(KIT)—South CampusInstitute for Applied BiosciencesKarlsruheGermany

In several filamentous fungi,incident light and environmental stress signaling share the mitogen-activated protein kinase(MAPK)HOG(SAK)*** has been revealed that short-term illumination with blue light triggers the activation of the HOG pathway in Trichoderma *** this study,we demonstrate the crucial role of the basic leucine zipper transcription factor ATF1 in blue light responses and signaling downstream of the MAPK HOG1 in Trichoderma *** lack of ATF1 severely impaired photoconidiation and delayed vegetative growth and conidial *** blue light or H2O2 stimuli,HOG1 interacted with ATF1 in the ***-wide transcriptome analyses revealed that 61.8%(509 out of 824)and 85.2%(702 out of 824)of blue light-regulated genes depended on ATF1 and HOG1,respectively,of which 58.4%(481 out of 824)were regulated by both of *** results also show that blue light promoted conidial germination and HOG1 and ATF1 played opposite roles in controlling conidial germination in the ***,the lack of ATF1 led to reduced oxidative stress resistance,probably because of the downregulation of catalase-encoding ***,our results demonstrate that ATF1 is the downstream component of HOG1 and is responsible for blue light responses,conidial germination,vegetative growth,and oxidative stress resistance in ***.

关键词： bZiP transcription factor ATF1 light responses MAPK HOG1 oxidative stress Trichoderma guizhouense