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Grain size distribution at four developmental stages of crescent dunes in the hinterland of the Taklimakan Desert,China

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Journal of Arid Land 2016年第5期8卷 722-733页

作者： jia Wenru zhang Chunlai LI Shengyu WANG Haifeng MA xuexi WANG Ningbo State Key Laboratory of Earth Surface Processes and Resource Ecology Ministry of Education Engineering Center of Desertification and Blown-sand Control Beijing Normal University Beijing 100875 China Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China Xinjiang Academy of Forestry Science Urumqi 830046 China

Although scientists have performed many studies on crescent （barchan） dunes in the Taklimakan Desert,few studies reported the changes in grain size at different development stages of crescent *** order to evaluate the changing trends of surface sediment grain size with dune development,we investigated the grain size characteristics at four developmental stages （oval sand pile,shield dune,incipient crescent dune and mature crescent dune） of crescent dunes by measuring the morphology of sand dune and observing the near-surface wind *** dunes have developed in a wide inter-dune corridor between high compound longitudinal ridges in China＇s Taklimakan *** surface sediments at four developmental stages of the crescent dunes were primarily composed of fine sands,followed by very fine and medium *** grain sizes ranged from 2.8 to 3.1 φ,with a unimodal *** sands were moderately well-sorted,their distribution varied from platykurtic to very platykurtic,and symmetrical or skewed towards the fine *** oval sand piles through shield and incipient crescent dunes to mature crescent dunes,incipient grain size gradually increased,particles became finer,sorting became better,kurtosis and skewness *** sizes on the surface layer became coarser upwards from the toe of the windward slope and then became finer towards the bottom of the leeward *** found that the coarsest particles at different positions at the four developmental stages were *** coarsest particles were distributed at the top of the oval sand piles and shield dunes,versus at the middle of the windward slope of the incipient and mature crescent *** between the mean grain size and other grain size parameters showed that as mean grain size became finer,sorting became better and kurtosis became wider,but skewness changed only *** addition,grain size variation in the surface sediments correlated with the movement speed of the dunes

关键词： crescent dune developmental stage grain size Taklimakan Desert

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Hydrothermal synthesis of peony-like CuO micro/nanostructures for high-performance lithium-ion battery anodes

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Chinese Chemical Letters 2017年第12期28卷 2263-2268页

作者： Rui Dang Xilai jia Peng Wang Xiaowei zhang Danni Wang Ge Wang Beijing Key Laboratory of Function Materials for Molecule&Structure Construction School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

The peony-like CuO micro/nanostructures were fabricated by a facile hydrothermal approach. The peony- like CuO micro/nanostructures about 3 -5μm in diameter were assembled by CuO nanoplates. These CuO nanoplates, as the building block, were self-assembled into multilayer structures under the action of ethidene diamine, and then grew into uniform peony-like CuO architecture. The novel peony-like CuO micro/nanostructures exhibit a high cycling stability and improved rate capability. The peony-like CuO microJnanostructures electrodes show a high reversible capacity of 456 mAhJg after 200 cycles, much higher than that of the commercial CuO nanocrystals at a current 0.1 C. The excellent electrochemical performance of peony-like CuO micro/nanostructures might be ascribed to the unique assembly structure, which not only provide large electrode/electrolyte contact area to accelerate the lithiation reaction, but also the interval between the multilayer structures of CuO nanoplates electrode could provide enough interior space to accommodate the volume change during Li insertion and de-insertion process,

关键词： CuO micro/nanostructure Self-assembly Hydrothermal method Hierarchical nanostructure Lithium-ion battery

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Performance analysis of AUL FeLAA and WiFi coexistence in the presence of Rayleigh fading channel and capture effect under unsaturated traffic conditions

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Science China(Information Sciences) 2019年第8期62卷 213-215页

作者： Wei WANG Pingping xu Yuan zhang Hongyun CHU National Mobile Communications Research Laboratory Southeast University Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences

Dear editor,Recently, the 3rd generation partnership project(3GPP) release 15 has evolved the licensed assisted access (LAA) framework into the autonomous uplink (AUL) future enhanced LAA (FeLAA). The frame of the AUL FeLAA transmits autonomously and needs no scheduling grant. Significantly, how to coexist with WiFi in the unlicensed band is an

关键词： Performance analysis of AUL FeLAA and WiFi coexistence in the presence of Rayleigh fading channel and capture effect under unsaturated traffic conditions Rayleigh

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Research on Eliminate Micro-Shorted MH/Ni Batteries

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Journal of Rare Earths 2004年第z1期22卷 358-359页

作者： Liang Wanlong zhang Zhong xu Shaoping Ma Yijun Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery CO. Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery CO.Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery CO.Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery CO.Ltd.Baotou 014030 China

There are two methods for selecting micro-shorted MH/Ni batteries out from all *** is to judge by the decrease of open circuit voltage which takes longer standing time to eliminate efficiently and does not work very well when the coverage of open circuit voltage is *** is to judge by discharge capacity of charged cells, this can not only meet the requirement of MH/Ni battery stored in charged state, but also has the advantages of being easier to read out, good accuracy and taking shorting standing time etc, is a proper way to be used on the production line.

关键词： micro-short open circuit voltage capacity standing capability

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Can You Feel the Love Tonight: A Dipeptidergic Circuit for Pleasant Touch

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Neuroscience Bulletin 2022年第8期38卷 966-968页

作者： Jing-Jing Yan Wen zhang Xiao-Hong xu Institute of Neuroscience State Key Laboratory of NeuroscienceCAS Center for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai200031China

Soft and gentle touches such as the maternal caressing of infants foster a sense of well-being,promote social bonding,and have long-lasting impacts on the brain and *** Yu's group recently identified a dipeptidergic excitatory circuit,from tachykinin 1(Tacl)-expressing neurons in the ventrolateral periaqueductal gray(/vIPAG)to oxytocin neurons in the paraventricular hypothalamus(PVH),that mediates the enduring effects of gentle touch on social behaviors.

关键词： peptidergic gentle hypothalamus

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Two New Coumarins from Fraxinus chinensis Rexb.

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Journal of Integrative Plant Biology 2007年第2期49卷 218-221页

作者： Dong-Mei zhang Li-Li Wang jia Li Li-Hong Hu Shanghai Research Center for Modernization of Traditional Chinese Medicine Shanghai Institute of Materia Medica Shanghai Institute for Biological Sciences the Chinese Academy of Sciences Shanghai 201203 China National Center for Drug Screening Shanghai Institute of Materia Medica Shanghai Institutes for Biological Sciences the Chinese Academy of Sciences Shanghai 201203 China School of Pharmacy East China University of Science and Technology Shanghai 200237 China

The ethanol extract of the stem bark of Fraxinus chinensis Roxb. showed good inhibitory bioactivity against VEGF receptor-1 kinase （IC50：13.8 μg/mL）. In order to find new and bioactive compounds, the chemical constituents of the stem bark of F. chinensis were investigated and two new coumarins, namely 6＇-O-sinapinoyl esculin （compound 1） and 6＇-O-vanillyl esculin （compound 2）, together with eleven known compounds （compounds 3-13） were isolated. The structures of the two new compounds were identified by their physicochemical properties and spectral analysis, particularly one- and two-dimensional nuclear magnetic resonance spectral methods. The known compound, oleuropein （compound 11）, exhibited moderate activity （IC50：（8.7 ± 1.3） μmol/L） to inhibit VEGF receptor- 1 kinase.

关键词： coumarins Fraxinus chinensis VEGF receptor-1 kinase.

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A novel Nance-Horan syndrome mutation identified by next-generation sequencing in a Chinese family

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International Journal of Ophthalmology(English edition) 2022年第6期15卷 1015-1019页

作者： Hong-Yan Sun Hong-Jing Zhu Ru-xu Sun Ying Wang jia-Nan Wang Bing Qin Wei-Wei zhang jiang-Dong Ji Department of Ophthalmology the First People's Hospital of SuqianSuqian 223800Jiangsu ProvinceChina Department of Ophthalmology the First Affiliated Hospital of Nanjing Medical UniversityNanjing Medical UniversityNanjing 210029Jiangsu ProvinceChina

AIM: To identify the disease-causing mutation in a fourgeneration Chinese family diagnosed with Nance-Horan syndrome(NHS). METHODS: A Chinese family, including four affected patients and four healthy siblings, was recruited. All family members received ophthalmic examinations with medical histories provided. Targeted next-generation sequencing approach was conducted on the two affected males to screen for their disease-causing mutations. RESULTS: Two male family members diagnosed with NHS manifested bilateral congenital cataracts microcornea, strabismus and subtle facial and dental abnormalities, while female carriers presented posterior Y-sutural cataracts. A novel frameshift mutation(c.3916_3919 del) in the NHS gene was identified. This deletion was predicted to alter the reading frame and generate a premature termination codon after a new reading frame. CONCLUSION: The study discovers a new frameshift mutation in a Chinese family with NHS. The findings broaden the spectrum of NHS mutations that can cause NHS in Chinese patients.

关键词： Nance-Horan Syndrome cataract next-generation sequencing NHS gene

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Effects of Glutamate and Na^+ on the Development and Enzyme Activity of the Oriental Migratory Locust,Locusta migratoria manilensis(Meyen) in Successive Generations

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Journal of Integrative Agriculture 2014年第4期13卷 819-826页

作者： ZHAO Xia jia Miao WANG Lei CAO Guang-chun zhang Ze-hua State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection Chinese Academy of Agricultural Sciences College of Plant Protection Shenyang Agricultural University

Rapid and mass rearing ofLocusta migratoria manilensis is an urgent need to meet the increasing demand for food of people. In this study, the effects of four artificial feeds on the development, reproduction and the activities of detoxification and protective enzymes of L. migratoria manilensis in three successive generations were investigated. The results showed that sucrose and monosodium glutamate （MSG） significantly increased the net reproductive rate （R0） and the intrinsic growth rate （rm） ofL. migratoria manilensis, but sodium chloride （0.17%） suppressed this increase. Furthermore, the artificial feed with sucrose and monosodium glutamate increased the activities of esterase （EST）, acetylcholinesterase （ACHE）, glutathione-S- transferase （GST）, multi-function oxidase （MFO）, phenol oxidase （PO）, catalase （CAT） and peroxidase （POD）, but inhibited the activity of superoxide dismutase （SOD）. However, sodium chloride （0.17%） increased the activities of EST, ACHE, CAT and SOD, and inhibited the activities of MFO, GST, PO and POD. Correlation analysis found that the increasing of PO activity and the decreasing of SOD activities were significantly related with the increasing of the intrinsic growth rate （rm）. The above results indicated that sucrose and monosodium glutamate could promote the development and reproduction of L. migratoria manilensis, but Na＋ inhibit such promotion with the concentration above 0.2%. The activities of PO and SOD can be used as biochemical standard to assess the effect of artificial feed.

关键词： Locusta migratoria manilensis artificial feed intrinsic rate phenol oxidase superoxide dismutase

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Changes in Mixed Layer Depth and Spring Bloom in the Kuroshio Extension under Global Warming

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Advances in Atmospheric Sciences 2016年第4期33卷 452-461页

作者： Ruosi zhang Shang-Ping XIE Lixiao xu Qinyu LIU Physical Oceanography Laboratory Qingdao Collaborative Innovation Center of Marine Science and TechnologyKey Laboratory of Ocean-Atmosphere Interaction and Climate in Universities of Shandong Ocean University of China Scripps Institution of Oceanography University of California San Diego

The mixed layer is deep in January-April in the Kuroshio Extension region. This paper investigates the response in this region of mixed layer depth （MLD） and the spring bloom initiation to global warming using the output of 15 models from CMIP5. The models indicate that in the late 21st century the mixed layer will shoal and the MLD reduction will be most pronounced in spring at about 33~N on the southern edge of the present deep-MLD region. The advection of temperature change in the upper 100 m by the mean eastward flow explains the spatial pattern of MLD shoaling in the models. Associated with the shoaling mixed layer, the onset of spring bloom inception is projected to advance due to the strengthened stratification in the warming climate.

关键词： mixed layer depth global warming temperature advection spring bloom

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Algorithms for improving accuracy of spray simulation

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Chinese Science Bulletin 2007年第8期52卷 1129-1135页

作者： zhang HuiYa zhang YuSheng XIAO HeLin xu Bo Faculty of Energy and Power Engineering Huazhong University of Science and Technology Wuhan 430074 China

Fuel spray is the pivotal process of direct injection engine *** accuracy of spray simula- tion determines the reliability of combustion ***,the traditional techniques of spray simulation in KIVA and commercial CFD codes are very susceptible to grid *** a conse- quence,predicted engine performance and emission can depend on the computational *** two main causes of this problem are the droplet collision algorithm and coupling between gas and liquid *** order to improve the accuracy of spray simulation,the original KIVA code is modified using the cross mesh droplet collision(CMC)algorithm and gas phase velocity interpolation *** the constant volume apparatus and *** engine,the improvements of the modified KIVA code in spray simulation accuracy are checked from spray structure,predicted average drop size and spray tip penetration,*** results show a dramatic decrease in grid *** these changes,the distorted phenomenon of spray structure is *** uncertainty in predicted aver- age drop size is reduced from 30 to 5μm in constant volume apparatus calculation,and the uncertainty is further reduced to 2μm in an engine *** predicted spray tip penetrations in engine simulation also have better consistency in medium and fine meshes.

关键词：喷射喷嘴模拟精度液滴碰撞算法气液相耦合

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