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MEASUREMENT OF ANGULAR VIBRATION AMPLITUDE BY ACTIVELY BLURRED IMAGES

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Chinese Journal of Mechanical Engineering 2007年第1期20卷 77-81页

作者： GUAN Baiqing WANG Shigang liu Chong LI qian School of Mechanical Engineenng Shanghai Jiaotong University Shanghai 200030 China

A novel motion-blur-based method for measuring the angular amplitude of a high-frequency rotational vibration is schemed. The proposed approach combines the active vision concept and the mechanism of motion-from-blur, generates motion blur on the image plane actively by extending exposure time, and utilizes the motion blur information in polar images to estimate the angular amplitude of a high-frequency rotational vibration. This method obtains the analytical results of the angular vibration amplitude from the geometric moments of a motion blurred polar image and an unblurred image for reference. Experimental results are provided to validate the presented scheme.

关键词： Vibration measurement Rotational vibration Active vision Motion blur Geometric moment

Hydrocarbons in igneous rock of Brazil:A review

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Petroleum Research 2020年第3期5卷 265-275页

作者： Kangxu Ren Junfeng Zhao qian liu Jian Zhao CNODC Brasil Petroleo e Gas Ltda Rio de Janeiro22250-040Brazil PetroChina Research Institute of Petroleum Exploration&Development Beijing100083China

Igneous rocks are widely developed in many hydrocarbon-bearing sedimentary basins in Brazil,and some igneous rocks play positive roles in the oil and gas accumulation *** so far,no industrial oil or gas flow is discovered in igneous rocks in Brazilian onshore *** present,in some literatures published by some researchers,cases of igneous reservoirs in Brazil are *** lithology of reservoirs in the Igarape Cuia oil and gas field,the oil and gas field of Urucu and the Barra Bonita gasfield,were previously thought to be volcanic rocks,but now are clastic rocks according to studies,and the igneous rocks in these three oil and gas field can only be acted as indirect and direct cap ***,igneous rock reservoirs in the Campos Basin and Santos Basin in the Brazilian offshore are briefly *** representative Badejo oilfield in the Campos Basin has igneous rock reservoirs dominated by basalts which are intercalated with thin layers of volcaniclastic and sedimentary rocks,the storage space are vesicules,fractures and vugular pores,and the porosity of hydrocarbon bearing interval basalt reservoirs ranges from 10%to 15%.In addition,for the Santos Basin,igneous rocks in this basin are dominated by basic rocks,some alkaline intrusive rocks develop good micro spaces,mainly crystal moldic pores,inter-and intra-crystal dissolution pores and fractures,better reservoir intervals are often concentrated such as at sections near to unconformity surfaces and can have porosity of 6%e9%or higher;local pre-salt igneous rock reservoirs in the Santos Basin have the necessary conditions for hydrocarbon accumulation and it will be a new target layer for hydrocarbon exploration.

关键词： Igneous reservoirs Badejo oilfield Pre-salt igneous rocks Offshore Campos basin Santos basin Brazil

Water blocking effect caused by the use of hydraulic methods for permeability enhancement in coal seams and methods for its removal

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International Journal of Mining Science and Technology 2016年第4期26卷 615-621页

作者： liu qian Guo Yusen An Fenghua Lin Luyao Lai Yongming Faculty of Resource Engineering Longyan University Longyan 364012 China Faculty of Safety Science and Engineering Henan Polytechnic University Jiaozuo 454000 China

To research techniques for removing the water blocking effect caused by hydraulic applications in coal seams,the use of surfactants is proposed,based on the mechanics of the water blocking *** experiments were used to validate the effects of using surfactants;the results show that after dealing with vacuum saturation with water,the volume of micropores decreases,which results in a larger average pore size,and the volume of transitional pores,mesopores,macropores and total pores *** on the distribution of pore size,the operation mode of ‘‘water infusion after gas extraction,then continuing gas extraction" is recommended to improve the volume of coal mine gas *** the reflectance of vitrinite in coal samples is less than 1,using the surfactants Fast T,1631,APG,BS can mitigate the damage caused by the water blocking *** when the reflectance of vitrinite is larger than 1.4,the damage caused by the water blocking effect can be *** the surfactant CMC is used in hydraulic applications,the capillary forces of coal samples are almost negative,which means the capillary force is in the same direction as the gas *** direction of capillary forces benefits the gas ***,using CMC can play an active role in removing the water blocking *** experiments confirm that using CMC can effectively remove the water blocking effect,which has a beneficial effect on improving the gas drainage volume.

关键词： Gas extraction Hydraulic measures Water blocking effect Capillary force Surfactant

Effect of woodchip types on heterocyclic aromatic amine formation and quality characteristics of smoked bacon

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Food Bioscience 2022年第3期47卷 938-946页

作者： Hongzhen Du qian liu qian Chen Xiufang Xia Ming Xu Baohua Kong College of Food Science Northeast Agricultural UniversityHarbinHeilongjiang150030China Shimadzu CO.LTD Shenyang110016China

The impact of different woodchips(beech,oak,pear,and apple)on the contents of heterocyclic aromatic amines(HAAs)and quality characteristics of smoked bacon was *** results indicated that the contents of total HAAs and non-polar HAAs in beech-and oak-smoked bacon were lower than that in pear-and apple-smoked bacon(P0.05).PCA of the HAA contents and quality characteristics could effectively differentiate that were unsmoked and smoked ***,woodchip types had a great influence on HAA contents and quality of smoked bacon.

关键词： Heterocyclic aromatic amine Bacon Woodchips Quality Smoking

Dealloyed TiCuMn efficiently catalyze the NO reduction and Zn-NO batteries

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Frontiers of Chemical Science and Engineering 2024年第9期18卷 51-59页

作者： Lang Zhang Tong Hou Weijia liu Yeyu Wu Tianran Wei Junyang Ding qian liu Jun Luo Xijun liu State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and MaterialsSchool of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China Education Department of Guangxi Zhuang Autonomous Region Key Laboratory of Applied Analytical ChemistryGuangxi Collaborative Innovation Center for Chemistry and Engineering of Forest ProductsGuangxi Key Laboratory of Chemistry and Engineering of Forest ProductsKey Laboratory of Chemistry and Engineering of Forest ProductsState Ethnic Affairs CommissionSchool of Chemistry and Chemical EngineeringGuangxi Minzu UniversityNanning 530006China Institute for New Energy Materials&Low-Carbon Technologies School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Institute for Advanced Study Chengdu UniversityChengdu 610106China ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of ChinaShenzhen 518110China

Electrocatalytic NO reduction reaction offers a sustainable route to achieving environmental protection and NH3 production targets as *** this work,a class of dealloyed Ti_(60)Cu_(33)Mn_(7)ribbons with enough nanoparticles for the high-efficient NO reduction reaction to NH_(3)is fabricated,reaching an excellent Faradaic efficiency of 93.2%at–0.5 V vs reversible hydrogen electrode and a high NH_(3) synthesis rate of 717.4μmol·h^(-1)·mg_(cat).^(-1) at–0.6 V vs reversible hydrogen *** formed nanoparticles on the surface of the catalyst could facilitate the exposure of active sites and the transportation of various reactive ions and ***,the Mn content in the TiCuMn ribbons modulates the chemical and physical properties of its surface,such as modifying the electronic structure of the Cu species,optimizing the adsorption energy of N^(*)atoms,decreasing the strength of the NO adsorption,and eliminating the thermodynamic energy barrier,thus improving the NO reduction reaction catalytic ***,a Zn-NO battery was fabricated using the catalyst and Zn plates,generating an NH_(3) yield of 129.1µmol·h^(-1)·cm^(-2)while offering a peak power density of 1.45 mW·cm^(-2).

关键词： nitric oxide reduction NH_(3)electrosynthesis TiCuMn alloy Mn modulation Zn-NO battery

Geobacter sulfurreducens promoted the biosynthesis of reduced graphene oxide and coupled it for nitrobenzene reduction

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Journal of Environmental Sciences 2024年第4期138卷 458-469页

作者： Shoujuan Zhang Qi liu Linrui Zhong Jianhong Jiang Xiaozhe Luo Xingxin Hu qian liu Yue Lu College of Environmental Science and Engineering Hunan UniversityChangsha 410082China Shenzhen Research Institute Hunan UniversityShenzhen 510082China Key Laboratory of Environment Biology and Pollution Control Hunan UniversityMinistry of EducationChangsha 410082China China Machinery International Engineering Design&Research Institute Co. LtdChangsha 410007China Hunan Engineering Research Center for Water Treatment Process&Equipment Changsha 410007China

In order to explore an efficient and green method to deal with nitrobenzene(NB)pollutant,reduced graphene oxide(r GO)as an electron shuttle was applied to enhance the extracellular electron transfer(EET)process of Geobacter sulfurreducens,which was a typical electrochemically active bacteria(EAB).In this study,r GO biosynthesis was achieved via the reduction of graphene oxide(GO)by *** PCA within 3 ***,the r GOPCA combining system completely reduced 50-200μmol/L of NB to aniline as end product within one *** characterization revealed that PCA cells were partly wrapped by rGO,and therefore the distance of electron transfer between strain PCA and r GO material was ***,the ID/IGof GO,r GO,and r GO-PCA combining system were 0.990,1.293 and 1.31,***,highest currents were observed in r GO-PCA-NB as 12.950μA/-12.560μA at -408 m V/156 m V,attributing to the faster electron transfer efficiency in EET ***,the NB reduction was mainly due to:(I)direct EET process from *** PCA to NB;(II)r GO served as electron shuttle and accelerated electron transfer to NB,which was the main degradation ***,the biosynthesis of r GO via GO reduction by Geobacter promoted the NB removal process,which provided a facile strategy to alleviate the problematic nitroaromatic pollution in the environment.

关键词： Reduced graphene oxide Geobacter Nitrobenzene Removal Extracellular electron transfer

The Status Quo and Developing Trend Analysis of Global Carbon Finance

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Chinese Journal of Population,Resources and Environment 2011年第4期9卷 34-41页

作者： liu qian Wang Yao Research center for climate and energy finance Institute of Finance and Economics Central University of Finance and Economics Beijing 100081 China

This paper gives a systematic view of the new trends of global carbon finance innovation under the challenge of global climate change and in the process of transition to achieve economic growth from "high carbon" to 'low carbon",covering the following aspects:the structure,status quo and developing trend of global carbon *** paper discusses the innovation in financial organization and service systems and governments' overall guidance and policy support,and draws the conclusion that the world is undergoing massive changes with governments actively responding to carbon finance to embrace the tremendous opportunities for clean energy and climate change in financial *** seize the opportunity,a complete and overall carbon finance system of China should be put in the top of the *** the current tasks of energy conservation and pollution reduction and the growing demand for capital input,China needs to construct an clear of policy guidance,a diversified financia service system,and a multi-approach carbon finance system to intensify and widen the participation of financial industry,to expand financing channels for sustainable economy and spread risks,and finally,work out an inexpensive solution to the realization of China's low carbon target.

关键词： climate change carbon trade market carbon finance

MoC nanocrystals confined in N-doped carbon nanosheets toward highly selective electrocatalytic nitric oxide reduction to ammonia

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Nano Research 2022年第10期15卷 8890-8896页

作者： Ge Meng Mengmeng Jin Tianran Wei qian liu Shusheng Zhang Xianyun Peng Jun Luo Xijun liu Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China Institute for New Energy Materials and Low-Carbon Technologies Tianjin Key Lab for Photoelectric Materials&DevicesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials and Guangxi Key Laboratory of Processing for NonFerrous Metals and Featured MaterialsSchool of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China Institute for Advanced Study Chengdu UniversityChengdu 610106China College of Chemistry Zhengzhou UniversityZhengzhou 450000China Institute of Zhejiang University–Quzhou Quzhou 324000China

Electrochemical nitric oxide reduction reaction(NORR)to produce ammonia(NH3)under ambient conditions is a promising alternative to the energy and carbon-intensive Haber–Bosch approach,but its performance is still ***,molybdenum carbides(MoC)nanocrystals confined by nitrogen-doped carbon nanosheets are first designed as an efficient and durable electrocatalyst for catalyzing the reduction of NO to NH3 with maximal Faradaic efficiency of 89%±2%and a yield rate of 1,350±15μg·h^(−1)·cm^(−2) at the applied potential of−0.8 V *** hydrogen electrode(RHE)as well as high stable activity with negligible current density and NH3 yield rate decays over a 30 h continue the ***,as a proof-of-concept of Zn–NO battery,it achieves a peak power density of 1.8 mW·cm^(−2) and a large NH3 yield rate of 782±10μg·h^(−1)·cm^(−2),which are comparable to the best-reported *** calculations reveal that the MoC(111)has a strong electronic interaction with NO molecules and thus lowering the energy barrier of the potential-determining step and suppressing hydrogen evolution *** work suggests that Mo-based materials are a powerful platform providing great opportunities to explore highly selective and active catalysts for NH3 production.

关键词： ammonia electrosynthesis green route molybdenum carbides(MoC)nanocrystals nitric oxide reduction reaction high selectivity

Column-orthogonal designs with multi-dimensional stratifications

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Science China Mathematics 2021年第6期64卷 1291-1304页

作者： Xue Yang Jian-Feng Yang Min-qian liu Qi Zhou School of Statistics Tianjin University of Finance and EconomicsTianjin 300222China School of Statistics and Data Science LPMC&KLMDASRNankai UniversityTianjin 300071China

The orthogonal Latin hypercube design and its relaxation,and column-orthogonal design,are two kinds of orthogonal designs for computer ***,they usually do not achieve maximum stratifications in multi-dimensional *** this paper,we propose some methods to construct column-orthogonal designs with multi-dimensional stratifications by rotating symmetric and asymmetric orthogonal *** newly constructed column-orthogonal designs ensure that the estimates of all linear effects are uncorrelated with each other and even uncorrelated with the estimates of all second-order effects(quadratic effects and bilinear effects)when the rotated orthogonal arrays have strength larger than *** orthogonality,the resulting designs also preserve better space-filling properties than those constructed by using the existing *** addition,we provide a method to construct a new class of orthogonal Latin hypercube designs with multi-dimensional stratifications by rotating regular factorial *** newly constructed orthogonal Latin hypercube designs are tabulated for practical use.

关键词： computer experiment Latin hypercube design orthogonal array orthogonality rotation matrix