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Climatology and seasonal variability of the Mindanao Undercurrent based on OFES data

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Acta Oceanologica Sinica 2013年第7期32卷 14-20页

作者： wang caixia LAN Jian wang Gang College of Physical and Environment Oceanography Ocean University of China Physical Oceanography Laboratory Ocean University of China

The simulation of an ocean general circulation model for the earth simulator （OFES） is transformed to an isopycnal coordinate to investigate the spatial structure and seasonal variability of the Mindanao Under- current （MUC）. The results show that （1） potential density surfaces, δ0=26.5 and δ0=27.5, can be chosen to encompass the M UC layer. Southern Pacilic tropical water （SPTW）, Antarctic Intermediate Water （AAIW） and high potential density water （HPDW） constitute the MUC. （2） Climatologically, the MOC exists in the form of dual-core. In some months, the dual-core structure changes to a single-core structure. （3） Choosing section at 8°N for calculating the transport of the MUC transport is reliable. Potential density constraint provides a good method for calculating the transport of the MOC. （4） The annual mean transport of the MUC is 8.34 × 106 m3/s and varies considerably with seasons： stronger in late spring and weaker in winter.

关键词： Mindanao Undercurrent southern Pacilic tropical water Antarctic intermediate water

Fine mapping and candidate gene analysis of purple pericarp gene Pb in rice (Oryza sativa L.)

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Chinese Science Bulletin 2007年第22期52卷 3097-3104页

作者： wang caixia SHU Qingyao IAEA-Zhejiang University Collaborating Center National Key Laboratory of Rice Biology and Key Laboratory of Chinese Ministry of Agriculture for Nuclear-Agricultural Sciences Institute of Nuclear Agricultural Sciences Zhejiang University Hangzhou 310029 China

Purple rice is a type of rice with anthocyanins deposited in its grain pericarp. The rice Pb gene control-ling purple pericarp character is known to be on chromosome 4,and the purple color is dominant over white color. In this study,we fine mapped the Pb gene using two F2 segregating populations,i.e. Pei'ai 64S(white) × Yunanheixiannuo(purple) and Pei'ai 64S × Chuanheinuo(purple) . In the first-pass map-ping,the Pb gene was located in the region downstream the SSR marker RM3820. In the fine mapping,the candidate region was saturated with InDel and CAPS markers developed specifically for this study. Eventually,the Pb gene was mapped within the 25-kb region delimited by the upstream marker RID3 and the downstream marker RID4. The delimited region contained two annotated genes,Ra and bhlh16(TIGR Rice Genome,R.5) . The former is a homologue of the Myc transcription factor Lc controlling anthocyanin biosynthesis in maize,and the latter is a homologue of the TT8 gene,which is also an Myc transcription factor gene controlling the pericarp pigmentation in Arabidopsis thaliana. Sequence analysis showed that the exon 7 of the Ra gene of Yunanheixiannuo and Chuanheinuo had a 2-bp(GT) deletion compared with those of the white rice varieties Pei'ai 64S,9311 and Nipponbare. A CAPS marker,CAPSRa,was developed according to the GT deletion for analysis of the two F2 segregating populations and 106 rice lines. The results showed that all F2 plants with white pericarp,and all non-purple rice lines(63 white and 22 red) contained no GT deletion,but all 20 purple rice lines con-tained the GT deletion. These results suggested that the Ra gene may be the Pb gene and the purple pericarp characteristic of rice is caused by the GT deletion within exon 7 of the Ra gene.

关键词：铅细胞绘图方法紫米基因

ANISOTROPIC CROUZEIX-RAVIART TYPE NONCONFORMING FINITE ELEMENT METHODS TO VARIATIONAL INEQUALITY PROBLEM WITH DISPLACEMENT OBSTACLE

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Journal of Computational Mathematics 2015年第1期33卷 86-99页

作者： Dongyang Shi caixia wang Qili Tang School of Mathematics and Statistics Zhengzhou University Zhengzhou 450001 China School of Mathematics and Information Science North China University of Water Resources and Electric Power Zhengzhou 450045 China School of Mathematics and Statistics Henan University of Science and Technology Luoyang 471023 China

In this paper, anisotropic Crouzeix-Raviart type nonconforming finite element meth- ods are considered for solving the second order variational inequality with displacement obstacle. The convergence analysis is presented and the optimal order error estimates are obtained under the hypothesis of the finite length of the free boundary. Numerical results are provided to illustrate the correctness of theoretical analysis.

关键词： Crouzeix-Raviart type nonconforming finite elements Anisotropy Variationalinequality Displacement obstacle Optimal order error estimates.

Diagnosis of Physical and Biological Control over Phytoplankton in the Gulf of Maine-Georges Bank Region Using an Adjoint Data Assimilation Approach

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Journal of Ocean University of China 2014年第3期13卷 356-368页

作者： wang caixia Paola Malanotte-Rizzoli Physical Oceanography Laboratory Ocean University of China Department of Earth Atmospheric and Planetary Sciences Massachusetts Institute of Technology

The linkage between physical and biological processes, particularly the effect of the circulation field on the distribution of phytoplankton, is studied by applying a two-dimensional model and an adjoint data assimilation approach to the Gulf of Maine-Georges Bank region. The model results, comparing well with observation data, reveal seasonal and geographic variations of phytoplankton concentration and verify that the seasonal cycles of phytoplankton are controlled by both biological sources and advection processes which are functions of space and time and counterbalance each other. Although advective flux divergences have greater magnitudes on Georges Bank than in the coastal region of the western Gulf of Maine, advection control over phytoplankton concentration is more significant in the coastal region of the western Gulf of Maine. The model results also suggest that the two separated populations in the coastal regions of the western Gulf of Maine and on Georges Bank are self-sustaining.

关键词： physical circulation biological source adjoint data assimilation

The destiny of the North Pacific Intermediate Water in the South China Sea

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Acta Oceanologica Sinica 2012年第5期31卷 41-45页

作者： LAN Jian ZHANG Ningning wang caixia Department of Oceanography Physical Oceanography LaboratoryOcean University of ChinaQingdao 266100China

The previous studies show that the spreading path of the subtropical salinity minimum of the North Pacific Intermediate Water （NPIW） is southwestward pointing to the Luzon Strait. Based on the P -vector method and generalized digital environmental model （GDEM） data, the volume transport of NPIW through Luzon Strait and the upward transport on the NPIW lower and upper boundaries are calculated to examine the destiny of NPIW in the South China Sea （SCS）. On the annual mean, the estimation of NPIW transport into the SCS through the Luzon Strait is 1.72 Sv （1Sv=10 6 m 3 /s）. The upward transport over the SCS is 0.31 Sv on the NPIW upper boundary and 1.31 Sv on the NPIW lower boundary. There is no strait or passage deeper than the surface for the NPIW to extend, except for the Luzon Strait. For the volume balance in the SCS NPIW, the volume transport of 2.72 Sv has to flow out of the SCS NPIW layer through the Luzon Strait.

关键词： North Pacific Intermediate Water South China Sea P -vector method

Diagnosis of Physical and Biological Controls on Phytoplankton Distribution in the Sargasso Sea

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Journal of Ocean University of China 2014年第1期13卷 32-44页

作者： wang caixia Paola Malanotte-Rizzoli Physical Oceanography Laboratory Ocean University of China Department of Earth Atmospheric and Planetary Sciences Massachusetts Institute of Technology

The linkage between physical and biological processes is studied by applying a one-dimensional physical-biological coupled model to the Sargasso Sea. The physical model is the Princeton Ocean Model and the biological model is a five-component system including phytoplankton, zooplankton, nitrate, ammonium, and detritus. The coupling between the physical and biological model is accomplished through vertical mixing which is parameterized by the level 2.5 Mellor and Yamada turbulence closure scheme. The coupled model investigates the annual cycle of ecosystem production and the response to external forcing, such as heat flux, wind stress, and surface salinity, and the relative importance of physical processes in affecting the ecosystem. Sensitivity experiments are also carried out, which provide information on how the model bio-chemical parameters affect the biological system. The computed seasonal cycles compare reasonably well with the observations of the Bermuda Atlantic Time-series Study(BATS). The spring bloom of phytoplankton occurs in March and April, right after the weakening of the winter mixing and before the establishment of the summer stratification. The bloom of zooplankton occurs about two weeks after the bloom of phytoplankton. The sensitivity experiments show that zooplankton is more sensitive to the variations of biochemical parameters than phytoplankton.

关键词： physical-biological coupled model annual cycle external forcing bio-chemical parameter

A Study for the Influence of the Location of PCMs Assembly System on Improving Thermal Environment inside Disaster-Relief Temporary Houses

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Journal of Renewable Materials 2021年第7期9卷 1239-1252页

作者： caixia wang Xiao Huang Hongqing Chena Weijie Liang State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430061China Institute for Disaster Management and Reconstruction Sichuan UniversityChengdu610041China

Currently,people pay more and more attention to the transitional resettlement of victims after various natural *** is an urgent need for a large number of temporary houses to resettle the victims after natural ***-relief temporary houses(DTHs)played an important role in the post-disaster resettlement in the past,which can not only be produced on a large scale,but also can be quickly and conveniently erected,which were the main means to solve the problem of transitional ***,due to their temporary nature,there was no extra energy consuming system installed in the DTHs *** the indoor thermal environment inside the DTHs was severe in *** this study,combined with the field experimental tests of the DTHs in Wenchuan Earthquake and Lushan Earthquake and the experimental study of the full-size DTH,it found that the thermal environment inside the DTH was intolerably high in *** had negative impact on *** order to improve the thermal environment inside DTHs during post-disaster period which lacked of extra energy resources,this study used the method of combining phase change materials(PCMs)with walls of the DTH to explore its feasibility and *** results showed that PCMs could effectively improve the thermal environment inside the DTH in ***,the difference of the composite positions between PCMs and the wall affected the improvement *** energy release rate of the PCMs assembly system(PAS)varied according to the positions of the PCMs.

关键词： Disaster-relief temporary houses(DTHs) phase change materials(PCMs) indoor thermal environment

Design, Synthesis and Antifungal Activity of Novel Thioureas Containing 1,3,4-Thiadiazole and Thioether Skeleton

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Chemical Research in Chinese Universities 2016年第4期32卷 615-620页

作者： wang caixia SONG Hailong LIU Weiqun XU Cuilian College of Tobacco Henan Agricultural UniversityZhengzhou 450002 P R. China College of Sciences Henan Agricultural UniversityZhengzhou 450002 P R. China College of Life Sciences Henan Agricultural UniversityZhengzhou 450002 P R. China

To find new lead compounds with high antifungal activity, a series of new thiourea derivatives containing 1,3,4-thiadiazole and thioether skeleton was designed via linking the active sub-structures. The target compounds were prepared via three steps from the commercially available thiosemicarbazide. Their structures were characterized by means of HRMS, IH NMR, 13C NMR and IR spectroscopy. The preliminary results indicate that the title compounds show various antifungal activity against the tested fungi. Compounds 4c, 4g, 4h, 4k, 4n, 4o, 4p, 4q and 4r display excellent antifungal activities against one or more tested fungi with inhibitory efficiencies of 90%--100% at 200 μg/mL. Especially, compound 4o shows the best inhibitory effect against Curvularia lunata, Cotton Fusarium Wilt, P P var nicotianae and Fusarium spp. with the EC50 values of 28.12, 30.41, 15.2 and 6.22 μg/mL, respectively, which are even superior to those of triadimefon（98.73, 96.58, 105.37 and 102.18 μg/mL）. The preliminary structure-activity relationship indicates that allyl and aromatic groups are favorable to their antifungal activities.

关键词： Thiourea 2-Amino-5-alkylthio-l,3,4-thiadiazole Antifungal activity

Phase transfer based synthesis and thermophysical properties of Au/Therminol VP-1 nanofluids

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Progress in Natural Science:Materials International 2013年第3期23卷 338-342页

作者： caixia wang Jun Yang Yulong Ding IPE-UoL Joint Institute for Energy Storage Research Institute of Process Engineering(IPE)Chinese Academy of Sciences University of Leeds(UoL) Leeds LS2 9JTUK

This paper reports a phase transfer based wet chemistry method for the preparation of Au/VP-1 *** method involves the transfer of AuCl 4 ions from water to the base liquid Therminol VP-1,followed by the reduction of AuCl 4 ions using NaBH *** prepared nanofluids are characterized for their thermophysical properties and *** results show that the mass concentration of Au particles has a significant effect on the stability of Au/VP-1 *** increase in the Au concentration results in a higher extent of agglomeration among the particles,leading to a decrease in the nanofluid *** results also show that the introduction of 0.005-0.05% Au nanoparticles enhances the thermal conductivity of the fluids by up to 6.5%,whereas the viscosity increase is minimal.

关键词： Therminol VP-1 Au nanoparticles Phase transfer Nanofluids