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Journal of Innovative Optical Health Sciences 2020年第1期3卷 19-34页

作者： Luming Liu Haibin qu College of Pharmaceutical Sciences Zhejiang University HangzhouZhejiang 310058P.R.China

Chemical imaging(CI)possesses a strong ability of pharmaceutical *** great strength relies on the integration of traditional spectroscopy(one dimension)and imaging technique(two dimensions)to generate three-dimensional data *** pre-processing or processing methods are proposed to analyze vast data matrixes and thereby realizing different research *** this review paper,various pharmaceutical applications of quality control over the past few years are summed up in two groups of final product test and industrial *** scope of"quality control"here includes traditional analytical use,process understanding and manufactural ***,two major challenges about undesirable sample geometry and lengthy acquisition time are discussed for prospective commercial or industrial application.

关键词： Hyperspectral imaging pharmaceutical application multivariate data analysis quality control

Invariant hypersurface flows in centro-affine geometry

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Science China Mathematics 2021年第8期64卷 1715-1734页

作者： Yun Yang Changzheng qu Department of Mathematics Northeastern UniversityShenyang 110819China School of Mathematics and Statistics Ningbo UniversityNingbo 315211China

In this paper,the invariant geometric flows for hypersurfaces in centro-affine geometry are *** first present evolution equations of the centro-affine invariants corresponding to the geometric *** on these fundamental evolution equations,we show that the centro-affine heat flow for hypersurfaces is equivalent to a system of ordinary differential equations,which can be solved ***,the centro-affine invariant normal flows for hypersurfaces are investigated,and two specific flows are provided to illustrate the behaviour of the flows.

关键词： invariant geometric flow centro-affine geometry heat flow normal flow centro-affine invariant

Analysis of Seasonal Differences of Chlorophyll,Dimethylsulfide,and Ice Between the Greenland Sea and the Barents Sea

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Journal of Ocean University of China 2023年第6期22卷 1592-1604页

作者： ZHONG Guangsheng qu Bo School of Science Nantong University226019China

Arctic Ocean(AO)climate is closely related to sea ice concentration(ICE)and chlorophyll_a(CHL)*** 2003–2014,the spatial average concentrations of CHL,ICE,sea surface temperature(SST),wind speed(WIND)in the Greenland Sea region(GS)(20˚W–10˚E,70˚–80˚N)and the Barents Sea region(BS)(30˚–50˚E,70˚–80˚N)are analysed and *** CHL was observed in BS,about 60%higher than that in *** with the northern regions of BS and GS(BSN and GSN),CHL in the southern region of BS and GS(BSS and GSS)increased by 77%and 42%*** ice melting in BSN is the main reason for phytoplankton *** 2010,there was an unusual peak of CHL concentration in *** sea-sonal peaks of CHL appeared two weeks earlier in BS than in *** earlier and more extensive ice melting and the persistent nega-tive North Atlantic Oscillation(NAO)index may be the reasons for higher CHL blooms in *** spatial average ICE concentra-tion of BS in BSN and BSS is 27%and 1.2%*** NAO in the previous winter may lead to an increase in ICE in *** has a great influence on CHL and ICE in *** melting is positively correlated with CHL,especially in GS in recent decades,CHL has a significant positive correlation with surface mass concentration of dimethylsulfide(DMS),especially in *** an indicator of Arctic warming,BS needs more attention from Arctic researchers.

关键词： dimethylsulfide chlorophyll ice North Atlantic Oscillation Arctic

Mesoporous Silica MCM-48 Membrane Synthesized on a Coarse-pore α-Al_2O_3 Ceramic Tube

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Chemical Research in Chinese Universities 2005年第2期21卷 131-133页

作者： LIUChun-yan WANGJin-qu InstituteofAdsorptionandInorganicMembrane DalianUniversityofTechnologyDalian116012P.R.Chinas／／FacultyofChemistryandChemicalEngineeringLiaoningNormalUniversityDalian116029P.R.China InstituteofAdsorptionandInorganicMembrane DalianUniversityofTechnologyDalian116012P.R.Chinas

A mesoporous MCM-48 membrane was synthesized on a coarse-pore α-alumina ceramic tube by hydrothermal treatment by using a cationic surfactant as the structure-directing agent under basic conditions. The products were characterized by small-angle X-ray diffraction, SEM measurements and N_2 adsorption experiments. The X-ray diffraction(XRD) results show that the membrane possesses a periodic mesostructure, which is typical for an MCM-48 material. The results of the SEM measurements indicate that MCM-48 grew in the pores of the support and formed a continuous membrane. The N_2 adsorption and desorption isotherms also show that the membrane is a typical mesoporous material with pore channel size of about 2.74 nm.

关键词： Mesoporous membrane MCM-48 Synthesis Alumina support

Nonlocal Symmetries of the Camassa-Holm Type Equations

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Chinese Annals of Mathematics,Series B 2020年第3期41卷 407-418页

作者： Lu ZHAO Changzheng qu Center for Nonlinear Studies and Department of Mathematics Ningbo UniversityNingbo 315211ZhejiangChina

A class of nonlocal symmetries of the Camassa-Holm type equations with bi-Hamiltonian structures, including the Camassa-Holm equation, the modified Camassa-Holm equation, Novikov equation and Degasperis-Procesi equation, is studied. The nonlocal symmetries are derived by looking for the kernels of the recursion operators and their inverse operators of these equations. To find the kernels of the recursion operators, the authors adapt the known factorization results for the recursion operators of the KdV, modified KdV, Sawada-Kotera and Kaup-Kupershmidt hierarchies, and the explicit Liouville correspondences between the KdV and Camassa-Holm hierarchies, the modified KdV and modified Camassa-Holm hierarchies, the Novikov and Sawada-Kotera hierarchies, as well as the Degasperis-Procesi and Kaup-Kupershmidt hierarchies.

关键词： Nonlocal symmetry Recursion operator Camassa-Holm equation Modified Camassa-Holm equation Novikov equation Degasperis-Procesi equation Liouville correspondence

Vertical Chlorophyll and Dimethylsulfide Profile Simulations in Southern Greenland Sea

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Journal of Ocean University of China 2022年第6期21卷 1565-1574页

作者： qu Bo SUN Wenjing School of Science Nantong UniversityNantong 226007China YK Pao School Middle School CampusShanghai 200336China

Biogenetic sulfide dimethylsulfide(DMS)plays a major role on the global climate,especially in Arctic *** simulate DMS concentration is an important *** we introduced both biogeochemical depth-averaged model G93 and its extension model-one dimensional DMS *** surface concentrations,vertical profiles of chlorophyll(CHL)and DMS are simulated using the two models within southern Greenland Sea(0°E–10°E,70°N–75°N)during year *** the input data for the models simulations,the spatial monthly mean of methodology forcings including sea surface temperature(SST),wind speed(WIND),cloud cover(CLD),sea ice concentration(ICE)and mixed layer depth(MLD)are *** 8-day time series of chlorophyll-a(CHL)are used as observation data for CHL related parameter ***ó’s imperial formula is used as the monthly DMS observation *** Genetic Algorithm technique is used for the parameter *** simulation results show that the most DMS related surface concentrations exhibit the normal distributions with peak during ***,DMS and DMSP(dimethylsulphoniopropionate)vertical profiles are obtained for July,August and September in year *** had the higher variation of subsurface concentration maximum(SCM)in July with the lower surface concentration *** had surface higher and subsurface lower profile for the all three *** also had subsurface high in *** SCM CHL diurnal variation in the subsurface also can be resulted from diurnal changes in MLD and vertical mixing variations,plus photolysis and wind-driven ventilations.

关键词： dimethylsulfide vertical profile chlorophyll biogeochemical modeling Greenland Sea

Finite p-groups whose nonnormal subgroups are metacyclic

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Science China Mathematics 2020年第7期63卷 1271-1284页

作者： Qiangwei Song Haipeng qu Department of Mathematics Shanxi Normal UniversityLinfen 041004China

For an odd prime p,we give a criterion for finite p-groups whose nonnormal subgroups are metacyclic,and based on the criterion,the p-groups whose nonnormal subgroups are metacyclic are classified up to *** solves a pr... 详细信息

关键词： metacyclic groups minimal nonabelian groups minimal nonmetacyclic groups p-groups of maximal class the rank of a p-group

Cost analysis of sand barriers in desertified regions based on the land grid division model

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Journal of Arid Land 2022年第9期14卷 978-992页

作者： YANG Suchang qu Zhun School of Economics Lanzhou UniversityLanzhou 730000China

Sand barriers are the most widely used mechanical implements for wind-blown sand control and desertification ***,there is no standard quantitative cost analysis of the sizes and materials required for sand *** this study,based on the original land grid division model for optimal resource utilization,we calculated the total side lengths of square and regular hexagonal sand barriers with the sizes of 1.0 m×1.0 m,2.0 m×2.0 m,and 3.0 m×3.0 m in a desertified region of the Shapotou area on the southeastern edge of the Tengger Desert,***,through literature review and social survey,we obtained the material cost and material utilization amount of sand barriers with different materials and ***,we calculated the costs of square and regular hexagonal sand barriers comprised of wheat straw,corn stalk,Salix mongolica,poly lactic acid,magnesium cement,and high-density polyethylene,with the sizes of 1.0 m×1.0 m,2.0 m×2.0 m,and 3.0 m×3.0 *** results show that the material cost of regular hexagonal corn stalk sand barriers with the size of 3.0 m×3.0 m is the lowest,while the material cost of square magnesium cement sand barriers with the size of 1.0 m×1.0 m is the *** using the same material,the cost of regular hexagonal sand barriers is lower than that of square sand barriers with the same *** using the same size,the cost of sand barriers with corn stalk material is lower than that of sand barriers with other *** on the above analysis,we can conclude that the economic benefits of regular hexagonal sand barriers are greater than those of square sand *** study provides a theoretical basis for accurately calculating the material cost of sand barriers,particularly for the estimated cost of mechanized sand barrier engineering projects.

关键词： desertification corn stalk sand barrier Salix mongolica land grid division economic cost railway Shapotou area

Estimates of generalized Chebyshev function on GLm

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Frontiers of Mathematics in China 2012年第5期7卷 883-894页

作者： Yan qu Shuai ZHAI Institute of Mathematics Chinese Academy of Sciences Beijing 100190 China School of Mathematics Shandong University Jinan 250100 China

In this paper, we study the generalized Chebyshev function related to automorphic L-functions of GLm（AQ）, and estimate its asymptotic behavior with respect to the parameters of the original automorphic objects.

关键词： Automorphic L-function Chebyshev function explicit formula,conductor

Synergistic impacts of anthropogenic and biogenic emissions on summer surface O_3 in East Asia

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Journal of Environmental Sciences 2013年第3期25卷 520-530页

作者： Yu qu Junling An Jian Li State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of Sciences

A factor separation technique and an improved regional air quality model （RAQM） were applied to calculate synergistic contributions of anthropogenic volatile organic compounds （AVOCs）,biogenic volatile organic compounds （BVOCs） and nitrogen oxides （NOx） to daily maximum surface O3（O3DM） concentrations in East Asia in summer （June to August 2000）.The summer averaged synergistic impacts of AVOCs and NOx are dominant in most areas of North China,with a maximum of 60 ppbv,while those of BVOCs and NOx are notable only in some limited areas with high BVOC emissions in South China,with a maximum of 25 *** result implies that BVOCs contribute much less to summer averaged O3DM concentrations than AVOCs in most areas of East Asia at a coarse spatial resolution （1×1） although global emissions of BVOCs are much greater than those of *** maximum total contributions of BVOCs can approach 20 ppbv in North China,but they can reach 40 ppbv in South China,approaching or exceeding those in some developed countries in Europe and North *** emissions in such special areas should be considered when O3 control measures are *** contributions among AVOCs,BVOCs and NOx significantly enhance O3 concentrations in the Beijing-Tianjin-Tangshan region and decrease them in some areas in South ***,the total contributions of BVOCs to O3DM vary significantly from day to day and from location to *** result suggests that O3 control measures obtained from episodic studies could be limited for long-term applications.

关键词： regional air quality model volatile organic compounds O3 factor separation technique synergistic contribution