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| 1 | Extreme drought changes in Southwest China from 1960 to 2009显示文摘从 1960 ~ 2009 在西南中国基于温度的每日的数据和 108 个气象学的车站的降水,我们计算每月、每年的表面潮湿的索引,以及极端干旱频率。根据数据,极端干旱频率在的时间、空间的特征内部年度,内部十,夏天季风时期和冬季季风时期被分析。结果如下被显示。(1 ) 一般来说,西南的四川盆,南部的 Hengduan 山, Guangxi 的南部的海岸和北贵州是极端干旱频率显著地在过去的 50 年里增加了的区域。至于十的变化,从 1960 年代,到 1980 年代,极端干旱频率介绍了一个减少的趋势,当 1990 年代是最湿的十年,整个区域正在变得湿时。在 2000 年代,极端干旱频率快速升起,但是地区性的差别还原剂。(2 ) 在夏天季风时期期间,干旱频率正在成长的极端,通常在四川盆附近发生在高山,最在云南 Guangxi 和塑造扫帚的山分开。高度在极端干旱频率上有影响,是不同的;在冬季季风时期期间,区域是相对湿的,极端干旱频率正在减少。(3 ) 在夏天季风时期期间,突然的变化在 2003 被观察,而突然的变化在冬季季风时期期间在 1989。年度极端干旱频率变化在夏天季风和冬季季风时期期间是突然的变化的重叠。年度极端干旱频率的离开顺序颤动是 quasi-5 年和 quasi-12 年。 | ZHANG Mingjun HE Jinyun WANG Baolong WANG Shengjie LI Shanshan LIU Wenli MA Xuening | 2013 | Journal of Geographical Sciences2013，23，1： | 43 |
| 2 | Glacier area variation and climate change in the Chinese Tianshan Mountains since 1960显示文摘基于自从 1960,在中国 Tianshan 山测量的冰河区域变化的统计,到气候变化的冰河区域变化的反应系统地被讨论。作为结果,冰河的全部的区域被 11.5% 在过去的 50 年里减少了,它根据中国(GIC ) 的冰河库存分开的 10 排水盆的冰河区域变化是一个加权的百分比。在中国 Tianshan 山的冰河的区域变化(APAC ) 的年度百分比在学习时期的标准化以后是 0.31% 。APAC 为不同排水盆广泛地变化,但是冰河通常处于快速的撤退的一个国家。根据在中国 Tianshan 山的 14 个气象学的车站,温度和降水以 0.34 整湲椠 ? 潮 ?湵晩牯 m 的率从 1960 ~ 2009 | WANG Shengjie ZHANG Mingjun LI Zhongqin WANG Feiteng LI Huilin LI Yaju HUANG Xiaoyan | 2011 | Journal of Geographical Sciences2011，21，2： | 31 |
| 3 | Tectonically deformed coal types and pore structures in Puhe and Shanchahe coal mines in western Guizhou显示文摘To evaluate the effect of tectonic deformation on coal reservoir properties, we provide an analysis of the types of tectonically deformed coal, macroand microscopic deformation and discuss pore structural characteristics and connectivity based on samples from the Puhe and Shanchahe coal mines. Our research shows that the tectonically deformed coal mostly includes cataclastic structural coal, mortar structural coal and schistose structural coal of a brittle deformation series. The major pore structures of different types of tectonically deformed coal are transitional pores and micropores. The pore volumes of macropores and visible fracture pores produced by structural deformations vary over a large range and increase with the intensity of tectonic deformation. Mesopores as connecting passages develop well in schistose structural coal. According to the shapes of intrusive mercury curves, tectonically deformed coal can be divided into parallel, open and occluded types. The parallel type has poor connectivity and is relatively closed; the open type reflects uniformly developed open pores with good connectivity while the occluded type is good for coalbed methane enrichment, but has poor connectivity between pores. | Li Ming Jiang Bo Lin Shoufa Wang Jilin Ji Mingjun Qu Zhenghui | 2011 | Mining Science and Technology2011，21，3： | 19 |
| 4 | Start of vegetation growing season on the Tibetan Plateau inferred from multiple methods based on GIMMS and SPOT NDVI data显示文摘在这研究,我们使用了四个方法从 1982~2012 在西藏的高原( TP )上调查成长季节( SGS )的开始,用从全球库存为研究建模并且印射获得的规范的差别植被索引( NDVI )数据( GIMSS , 19822006 )并且点植被( SPOT-VGT , 19992012 )。用四个方法估计的 SGS 价值沿着纬度或高度的坡度显示出类似的空间模式,但是与在 SGS 日期的重要变化。最大的差异主要在这些区域被发现与最高或最低植被范围。在 1982 和 1998 之间,然而,从四个方法导出的 SGS 值都根据更最近的点 VGT 数据(19992012 ) 显示一个进展趋势,没有 TP 上的 SGS 的连续地进展的趋势。在价值从在 1999 和 2006 之间的 GIMMS 和点导出的 SGS 之间的关联的分析数据来源与问候在趋势表明一致性到并且到使用的四个分析方法。与另外的方法相比,最大的一致性在之间在里面 situ 数据和检索的 SGS 值与方法 3 被获得(NDVI 比率的阀值) 。避免错误在有多样的植被类型和物理环境的一个广阔区域,知道不同植被类型的季节的变化特征是批评的,特别地在有稀少的草地的区域或常绿树森林。 | DING Mingjun LI Lanhui ZHANG Yili SUN Xiaomin LIU Linshan GAO Jungang WANG Zhaofeng LI Yingnian | 2015 | Journal of Geographical Sciences2015，25，2： | 17 |
| 5 | The seasonal variations of δ^(18)O , Cl^- , Na^+ ,NO_3^- and Ca^(2+) in the snow and firn recovered from Princess Elizabeth Land, Antarctica显示文摘Snow and firn samples recovered from two snow pits (2.5 and 4.5m deep) and one 50-m firn core along the route of the 1996/1997 Chinese First Antarctic Inland Traverse Expedition in Princess Elizabeth Land, East Antarctica, have been measured for chemical composition and oxygen isotope ratio. In the two snow pits, the variations of NO3- are partly in phase with that of δ18O, while the variations of Cl- and Na+ are in inverse phase with that of δ18O. | LI Zhongqin, ZHANG Mingjun, QIN Dahe, XIAO Cunde, TIAN Lide KANG Jiancheng and LI Jun Lanzhou Institute of Glaciology and Geocryology , Chinese Academy of Sciences , Lanzhou 730000, China Chinese Institute of Polar Research, Shanghai 200129, China Antarctic CRC and Australian Antarctic Division , Hobart, Australia Corresponding author | 1999 | Chinese Science Bulletin1999，44，24： | 17 |
| 6 | Control of Rice Embryo Development, Shoot Apical Meristem Maintenance, and Grain Yield by a Novel Cytochrome P450显示文摘被子植物种子通常由二主要部分组成:胚胎和内乳。然而,分子的机制 underlyingembryo 和内乳发展仍然保持大部分未知,特别地在米饭,模型谷物。这里,我们报导 identificationand 米饭巨人胚胎(GE ) 基因的功能的描述。GE 的变化在种子导致了一个大胚胎,它被胚鳞房间的过多的扩大引起。embryonic 以后 growthof ge 幼苗严重地由于有缺点的射击被禁止顶端的分裂组织(SAM ) 维护。基于地图的克隆表明 thatGE 编码对 endoplasmic 蜂窝胃局部性的 CYP78A 亚科 P450 monooxygenase。GE 在 scutellar 上皮主要被表示,在胚胎和内乳之间的接口区域。Overexpressionof GE 支持了细胞增长并且提高了米饭植物生长和谷物产量,但是减少了胚胎尺寸,建议 GE 为协调米饭胚胎和内乳开发是批评的。而且,转基因的 Arabidopsis 植物 overexpressing AtCYP78A10,一个 GE 相当或相同的事物,也生产的更大的种子,在一起调整种子 development.Taken 为 P450s 的 CYP78A 亚科暗示一个保存角色,我们的结果显示 GE 在调整胚胎发展和 SAM maintenance.Key 词起关键作用: | Weibing Yang Mingjun Gao Xin Yin Jiyun Liu Yonghan Xu Longjun Zeng Qun Li Shubiao Zhang Junmin Wang Xiaoming Zhang Zuhua He | 2013 | Molecular Plant2013，6，6： | 16 |
| 7 | Glacier area shrinkage in China and its climatic background during the past half century显示文摘在遥感监视的中国的典型区域基于冰河区域变化记录,吗象从 139 的空气温度和 降水的气象学的数据一样驻扎并且 0 ??????????????????????????吠慭吗?? | ZHANG Mingjun WANG Shengjie LI Zhongqin WANG Feiteng | 2012 | Journal of Geographical Sciences2012，22，1： | 14 |
| 8 | Sugar metabolism and accumulation in the fruit of transgenic apple trees with decreased sorbitol synthesis显示文摘Both sorbitol and sucrose are synthesized in source leaves and transported to fruit for supporting fruit growth in tree fruit species of the Rosaceae family.In apple(Malus domestica),antisense suppression of aldose-6-phosphate reductase,the key enzyme for sorbitol synthesis,significantly decreased the sorbitol concentration but increased the sucrose concentration in leaves,leading to a lower sorbitol but a higher sucrose supply to fruit in these plants.In response to this altered carbon supply,the transgenic fruit had lower concentration of sorbitol and much higher concentration of glucose but similar levels of fructose,sucrose,and starch throughout fruit development relative to the untransformed control.Activities of sorbitol dehydrogenase,fructokinase,and sucrose phosphate synthase were lower,whereas activities of neutral invertase,sucrose synthase,and hexokinase were higher in the transgenic fruit during fruit development.Transcript levels of MdSOT1,MdSDHs,MdFK2,and MdSPS3/6 were downregulated,whereas transcript levels of MdSUC1/4,MdSUSY1-3,MdNIV1/3,MdHKs,and MdTMT1 were upregulated in the transgenic fruit.These findings suggest that the Sucrose cycle and the sugar transport system are very effective in maintaining the level of fructose and provide insights into the roles of sorbitol and sucrose in regulating sugar metabolism and accumulation in sorbitol-synthesizing species. | Mingjun Li Pengmin Li Fengwang Ma Abhaya M.Dandekar Lailiang Cheng | 2018 | Horticulture Research2018，5，1： | 12 |
| 9 | Characteristics of strike-slip inversion structures of the Karatau fault and their petroleum geological significances in the South Turgay Basin,Kazakhstan显示文摘The Karatau fault is one of the important strike-slip faults in central Asia,and the South Turgay Basin is located towards its northern end.Detailed seismic interpretation indicated that the strikeslip tectonism of the Karatau fault weakened gradually from west to east in the South Turgay Basin.Typical flower structures developed on the section,and strike-slip faults showed an echelon pattern on planar view.The Karatau strike-slip fault affected the South Turgay Basin in two periods:(1) The South Turgay strike-slip pull-apart rift basin formed as a result of regional extensive stress in the Early-Middle Jurassic,characterized by the juxtaposition of horsts and grabens.The formation of horsts provided favorable reservoir spaces for later hydrocarbon accumulation,and different filling stages of grabens controlled different reservoir-forming factors in grabens.(2) Two stages of tectonic inversion occurred in the Late Jurassic and Late Cretaceous and played a crucial role in the final shape of the structure in the South Turgay Basin.The oil and gas migrated to form reservoirs and mainly concentrated in the horsts,graben slopes and in both sides of the strike-slip fault zone.In the case of the degree of accumulation of petroleum,the factor explaining why horsts are better than grabens is the strike-slip pull-apart of the South Turgay Basin,and the structure inversion of the South Turgay Basin explains why the west graben is better than the east one.Overall,the Karatau strike-slip fault played a very important role in the formation of the South Turgay Basin and its hydrocarbon accumulations. | Yin Wei Fan Zifei Zheng Junzhang Yin Jiquan Zhang Mingjun Sheng Xiaofeng Guo Jianjun Li Qiyan Lin yaping | 2012 | Petroleum Science2012，9，4： | 11 |
| 10 | Antibacterial Performance of a Cu-bearing Stainless Steel against Microorganisms in Tap Water显示文摘Tap water is one of the most commonly used water resources in our daily life. However, the increasing water contamination and the health risk caused by pathogenic bacteria, such as Staphylococcus aureus and Escherichia coli have attracted more attention. The mutualism of different pathogenic bacteria may diminish antibacterial effect of antibacterial agents. It was found that materials used for making pipe and tap played one of the most important roles in promoting bacterial growth. This paper is to report the performance of an innovative type 304 Cu-bearing stainless steel(304Cu SS) against microbes in tap water. The investigation methodologies involved were means of heterotrophic plate count, contact angle measurements, scanning electron microscopy for observing the cell and subtract surface morphology,atomic absorption spectrometry for copper ions release study, and confocal laser scanning microscopy used for examining live/dead bacteria on normal 304 stainless steel and 304 Cu SS. It was found that the surface free energy varied after being immersed in tap water with polar component and Cu ions release.The results showed 304 Cu SS could effectively kill most of the planktonic bacteria(max 95.9% antibacterial rate), and consequently inhibit bacterial biofilms formation on the surface, contributing to the reduction of pathogenic risk to the surrounding environments. | Mingjun Li Li Nan Dake Xu Guogang Ren Ke Yang | 2015 | Journal of Materials Science & Technology2015，31，3： | 10 |
| 11 | Increased activity of MdFRK2, a high-affinity fructokinase, leads to upregulation of sorbitol metabolism and downregulation of sucrose metabolism in apple leaves显示文摘To investigate the functions of fructokinase(FRK)in apple(Malus domestica)carbohydrate metabolism,we cloned the coding sequences of MdFRK1 and MdFRK2 from the‘Royal Gala’apple.The results showed that MdFRK2 expression was extremely high in shoot tips and young fruit.Analyses of heterologously expressed proteins revealed that MdFRK2 had a higher affinity for fructose than did MdFRK1,with Km values of 0.1 and 0.62 mM for MdFRK2 and MdFRK1,respectively.The two proteins,however,exhibited similar Vmax values when their activities were significantly inhibited by high concentrations of fructose.MdFRK2 ectopic expression was associated with a general decrease in fructose concentration in transgenic lines.In leaves,increased FRK activity similarly resulted in reduced concentrations of glucose and sucrose but no alterations in sorbitol concentration.When compared with those in the untransformed control,genes involved in sorbitol synthesis(A6PR)and the degradation pathway(SDH1/2)were significantly upregulated in transgenic lines,whereas those involved in sucrose synthesis(SPS1)and other degradation processes(SUSY4,NINV1/2,and HxK2)were downregulated.The activity of enzymes participating in carbohydrate metabolism was proportional to the level of gene expression.However,the growth performance and photosynthetic efficiency did not differ between the transgenic and wild-type plants.These results provide new genetic evidence to support the view that FRK plays roles in regulating sugar and sorbitol metabolism in Rosaceae plants. | Jingjing Yang Lingcheng Zhu Weifang Cui Chen Zhang Dongxia Li Baiquan Ma Lailiang Cheng Yong-Ling Ruan Fengwang Ma Mingjun Li | 2018 | Horticulture Research2018，5，1： | 9 |
| 12 | Cell membrane-covered nanoparticles as biomaterials显示文摘Surface engineering of synthetic carriers is an essential and important strategy for drug delivery in vivo.However,exogenous properties make synthetic nanosystems invaders that easily trigger the passive immune clearance mechanism,increasing the retention effect caused by the reticuloendothelial systems and bioadhesion,finally leading to low therapeutic efficacy and toxic effects.Recently,a cell membrane cloaking technique has been reported as a novel interfacing approach from the biological/immunological perspective,and has proved useful for improving the performance of synthetic nanocarriers in vivo.After cell membrane cloaking,nanoparticles not only acquire the physiochemical properties of natural cell membranes but also inherit unique biological functions due to the presence of membrane-anchored proteins,antigens,and immunological moieties.The derived biological properties and functions,such as immunosuppressive capability,long circulation time,and targeted recognition integrated in synthetic nanosystems,have enhanced their potential in biomedicine in the future.Here,we review the cell membrane-covered nanosystems,highlight their novelty,introduce relevant biomedical applications,and describe the future prospects for the use of this novel biomimetic system constructed from a combination of cell membranes and synthetic nanomaterials. | Mingjun Xuan Jingxin Shao Junbai Li | 2019 | National Science Review2019，6，3： | 9 |
| 13 | Effects of location within the tree canopy on carbohydrates,organic acids,amino acids and phenolic compounds in the fruit peel and flesh from three apple(Malus×domestica)cultivars显示文摘Fruits from three cultivars of apple(Malus × domestica Borkh.)—‘McIntosh’,‘Gala’and‘Mutsu’—were harvested from the exterior and interior of the tree canopy.Peel and flesh tissues were sampled separately to determine how the position of the fruit on the tree might affect the levels of the primary and secondary metabolites in the fruit.Fruit from the outer-canopy had a higher fresh weight and a higher soluble solids content compared with inner-canopy fruit.Both the flesh and peel of the outer-canopy fruit had higher concentrations of soluble sugars and sugar alcohols,but lower starch concentrations than the inner-canopy fruit.Canopy position did not significantly affect malic acid concentrations,except in the peel of‘McIntosh’and the flesh of‘Mutsu’.Although levels of ascorbic and succinic acids were higher in the peel of the outer-canopy fruit,the responses of other organic acids to canopy position depended on tissue type and cultivar.Except for histidine,lysine,threonine and glycine,most amino acids accumulated at higher concentrations in the inner-canopy fruit.By contrast,levels of phenolic compounds from both the peel and flesh were significantly higher in the outer-canopy fruit.The significant effects of location within the canopy on both primary metabolites and secondary metabolites demonstrate the importance of light exposure on apple fruit quality. | Fengjuan Feng Mingjun Li Fengwang Ma Lailiang Cheng | 2014 | Horticulture Research2014，1，1： | 7 |
| 14 | Two-dimensional materials: Emerging toolkit for construction of ultrathin high-efficiency microwave shield and absorber显示文摘 | Mingjun Hu Naibo Zhang Guangcun Shan Jiefeng Gao Jinzhang Liu Robert K. Y. Li | 2018 | Frontiers of physics2018，13，4： | 6 |
| 15 | Potassium Uptake and Transport in Apple Roots Under Drought Stress显示文摘As one of the most important mineral nutrient elements, potassium(K^+) plays an important role in many plant physiological processes and determines both the yield and quality of crops. There are two typical gene families that regulate K^+transport in higher plants, including K^+channels and K^+transporters. However, little is known about how these channels and transporters divide their work in response to drought stress. In this study, the hydroponic experiment was conducted on Malus hupehensis. The K^+content was found to decrease in response to drought stress in M. hupehensis, the aboveground decreased by 34.15% and the underground decreased by 3.97%. Meanwhile, the root morphology change was detected by scanning the root system. Under conditions of drought, the genes encoding K^+transporters were upregulated including MdCHX1.3, MdCHX4.11, MdCHX4.8, MdCHX4.9, Md HKT1, and MdHAK3.2. The net influx of K^+was inhibited by 19.47% with the action of K^+channel inhibitors(CsCl), however a significant decrease(80.99%; P < 0.05) was found in roots exposed to a PM H+-ATPase(orthovanadate) inhibitor by utilizing a non-invasive micro-test technique. The trend of H+efflux was similar to that of K^+. The data suggested that the positive influx of K^+through the transporter accounted for the main K^+uptake under drought stress. These results suggest that we can improve the uptake of K^+by purposely up-regulating specific K^+transporters under drought stress. This process may improve growth, yield, quality, and stress tolerance in apple trees. | Jianguo Qi Simin Sun Lin Yang Mingjun Li Fengwang Ma Yangjun Zou | 2019 | Horticultural Plant Journal2019，5，1： | 6 |
| 16 | Hydrological processes of glacier and snow melting and runoff in the Urumqi River source region, eastern Tianshan Mountains, China显示文摘水文学过程被比较,有或没有分泌物上的降水的影响,到在 Urumqi 河来源区域识别 glacierized 和 non-glacierized 集水之间的差别在东方 Tianshan 山的北斜坡上,在在 2011 的融化的季节(MaySeptember ) 期间。学习基于在 10-min 间隔,在 15-min 间隔观察的气象学的数据,并且冰河从空冰斗, Zongkong,和计量车站的 Urumqi 冰河 No.1 融化和雪观察观察的水文学数据。结果显示分泌物在三之中显著地不同计量车站。每日的分泌物多于在计量车站的冰河 No.1 的夜里的分泌物,它形成对照,模式在计量车站的 Zongkong 和空冰斗观察了。在在三个计量车站的分泌物有一个清楚的每日的变化,与在山峰分泌物的大小和持续时间的差别。当降水没被考虑时,在最大的分泌物和最高的温度之间的时间落后是在分别地计量车站的冰河 No.1,空冰斗,和 Zongkong 的 13 h, 1016 h,和 511 h。当降水被考虑时,相应时间落后分别地是 01 h, 13 h,和 67 h。因此,从到融合的分泌物的产生的持续时间在 glacierized 集水是最短的并且在被雪主要盖住的集水最长。降水什么时候被考虑,也被显示出从到融合的分泌物的产生的水文学过程弄短。在三之中在分泌物影响变化计量车站的因素是不同的。为冰河 No.1 车站,分泌物被热条件主要在 glacierized 区域控制,并且当温度超过了 5 时,分泌物显示了加速的生长 ? 楷桴 ? 朿丠佩愠摮 ???? 噐? 攠畱癩污湥 ? 潴 ?? ┿瑷倠 ?? 湩眠楥桧 ? 祳瑮敨楳? 愠 ?? 整灭牥瑡牵 ? | SUN Meiping YAO Xiaojun LI Zhongqin ZHANG Mingjun | 2015 | Journal of Geographical Sciences2015，25，2： | 6 |
| 17 | Lipid-dependent conformational dynamics underlie the functional versatility of T-cell receptor显示文摘T 房间 receptor-CD3 建筑群(TCR ) 是能基于 CD3 细胞质的领域的各种各样的生物化学的变化开始抗原特定的有免疫力的回答的一台万用的发信号机器,但是内在的结构的基础留下逃犯。这里,我们开发了生物物理的途径学习 CD3 细胞质的领域的 conformational 动力学(CD3 CD ) 。在单个分子的水平,我们发现那 CD3 CD 能与三个功能的主题的不同坦诚有多重 conformational 状态,即, ITAM, BRS 和 PRS。因为,这些符合构造被产生 CD3 CD 有异构的类脂化合物绑定性质因此有异构的动力学。实时房间的成像实验证明不同抗原刺激能稳定 CD3 在不同符合构造的 CD 。类脂化合物依赖者 conformational 动力学因此为 TCR 的万用的发信号性质提供结构的基础。 | Xingdong Guo Chengsong Yan Hua Li Wenmao Huan Xiaoshan Shi Min Huang Yingfang Wang Weiling Pan Mingjun Cai Lunyi Li Wei Wu Yibing Bai Chi Zhang Zhijun Liu Xinyan Wang Xiaohui F Zhang Chun Tang Hongda Wang Wanli Liu Bo Ouyang Catherine C Wong Yi Cao Chenqi Xu | 2017 | Cell Research2017，27，4： | 5 |
| 18 | On-machine Precision Preparation and Dressing of Ball-headed Diamond Wheel for the Grinding of Fused Silica显示文摘In the grinding of high quality fused silica parts with complex surface or structure using ball-headed metal bonded diamond wheel with small diameter,the existing dressing methods are not suitable to dress the ball-headed diamond wheel precisely due to that they are either on-line in process dressing which may causes collision problem or without consideration for the effects of the tool setting error and electrode wear.An on-machine precision preparation and dressing method is proposed for ball-headed diamond wheel based on electrical discharge machining.By using this method the cylindrical diamond wheel with small diameter is manufactured to hemispherical-headed form.The obtained ball-headed diamond wheel is dressed after several grinding passes to recover geometrical accuracy and sharpness which is lost due to the wheel wear.A tool setting method based on high precision optical system is presented to reduce the wheel center setting error and dimension error.The effect of electrode tool wear is investigated by electrical dressing experiments,and the electrode tool wear compensation model is established based on the experimental results which show that the value of wear ratio coefficient K' tends to be constant with the increasing of the feed length of electrode and the mean value of K' is 0.156.Grinding experiments of fused silica are carried out on a test bench to evaluate the performance of the preparation and dressing method.The experimental results show that the surface roughness of the finished workpiece is 0.03 μm.The effect of the grinding parameter and dressing frequency on the surface roughness is investigated based on the measurement results of the surface roughness.This research provides an on-machine preparation and dressing method for ball-headed metal bonded diamond wheel used in the grinding of fused silica,which provides a solution to the tool setting method and the effect of electrode tool wear. | CHEN Mingjun LI Ziang YU Bo PENG Hui FANG Zhen | 2013 | Chinese Journal of Mechanical Engineering2013，26，5： | 5 |
| 19 | A conservative local discontinuous Galerkin method for the solution of nonlinear Schrdinger equation in two dimensions显示文摘In this study, we present a conservative local discontinuous Galerkin(LDG) method for numerically solving the two-dimensional nonlinear Schrdinger(NLS) equation. The NLS equation is rewritten as a firstorder system and then we construct the LDG formulation with appropriate numerical flux. The mass and energy conserving laws for the semi-discrete formulation can be proved based on different choices of numerical fluxes such as the central, alternative and upwind-based flux. We will propose two kinds of time discretization methods for the semi-discrete formulation. One is based on Crank-Nicolson method and can be proved to preserve the discrete mass and energy conservation. The other one is Krylov implicit integration factor(IIF) method which demands much less computational effort. Various numerical experiments are presented to demonstrate the conservation law of mass and energy, the optimal rates of convergence, and the blow-up phenomenon. | ZHANG RongPei YU XiJun LI MingJun LI XiangGui | 2017 | Science China Mathematics2017，60，12： | 5 |
| 20 | Chemical Characteristics and Environmental Significance of Fresh Snow Deposition on Urumqi Glacier No.1 of Tianshan Mountains, China显示文摘Ice and snow chemistry of alpine glaciers is crucial for the research of regional atmospheric environment change. Fresh snow samples were weekly collected from Urumqi Glacier No.1 in the Tianshan Mountains, Xin- jiang, China, and the chemical characteristics and seasonal variations of major ions, mineral dust, δ18O and trace metals were measured. Results show that the concentrations of major ions in the snow are Ca2+ > SO42-> NH4+ > NO3-> Cl-> Na+ > Mg2+ > K+, in which Ca2+ is the dominant cation, and SO42-is the dominant anion. All major ions have close positive correlations with each other except NO3-. δ18O shows positive correlation with air temperature change during the study period. Mineral dust particle and major ionic concentrations in fresh snow have obvious seasonal change, with high concentration in spring but low concentration in summer and autumn, which indicates that the chemical mass input from Asian dust activity to snow is very significant. Temporal changes of trace metals in fresh snow, e.g., Cd, Pb, Zn, Al, Fe, have shown that human-induced pollution of central Asian region also has large contribution to the snow chemistry on alpine glaciers of the Tianshan Mountains. | LI Zhongqin | 2010 | Chinese Geographical Science2010，20，5： | 5 |
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