Research on the Application of Supply Chain Financing in International Trade—Based on the Perspective of Chinese SMES in Beef Import Industry

我国进口牛肉行业迎合了时代的需求，一大批优秀的中小企业伴随着时代的变迁与进口牛肉行业的发展，如雨后春笋般蓬勃崛起。这些牛肉行业中小进口企业为我国牛肉的进口事业、为我国居民进口牛肉的消费做出了重要贡献，在自身取得发展的同时也创造了大量的社会就业，更培育了一大批进口领域优秀的专业人才。但目前，资金流短缺，企业运营融资难的问题一直成为束缚我国牛肉行业中小进口企业发展的巨大问题，如何有效解决我国进口牛肉中小企业融资难的问题现实意义重大。 本文第一部分从理论方面阐述了供应链融资与国际贸易融资的定义，主要方式以及目前的运用概况； 本文第二部分首先着眼于全球牛肉行业概况的论述，继而转入分析我国进口牛肉的...With the beef imports in China developing rapidly and greatly meeting the requirements of the times and a batch of excellent small-sized and medium-sized enterprises are springing up. These enterprises contribute a lot to Chinese beef importing industry and resident beef consumption. With the great development of the beef importing industry in China,it offers lots of employment opportunities and m...学位：国际商务硕士院系专业：经济学院_国际商务硕士学号：1572012115185

不同生物炭材料的制备及其在Li-S电池中的应用（英文）

通过可再生生物质制备的生物炭具有成本低、环保和资源可再生的优势。本研究以分布广泛的稻谷壳、芒草、杉木和柚子皮等生物质为原料,制备了4种不同类型生物炭,然后研究了其作为锂-硫电池硫/碳正极的载体的性能。研究表明由稻谷壳制备的硫/生物炭正极材料表现出最高的比容量和最优的循环稳定性。为了进一步改善其电性能,以SiO溶胶为模板制备了具有高孔隙率的稻谷壳生物炭,其多孔结构可有效抑制多硫化物的溶解。由此得到的硫/生物炭（硫含量为60%（w,质量分数））材料中的硫以无定型态均匀地分散在碳载体中。该材料表现出更优异的电化学性能:在0.2C(1C=1675 m A?g)倍率下,首周放电容量为1534.1 mAh?g,循环100周后仍可保持在783.7 mAh?g;倍率性能测试中,在2.0C倍率下,材料的可逆容量为485.3 mAh?g。supported by the National Natural Science Foundation of China(21373008)；Fundamental Research Funds for the Central Universities,China(20720160124)~~

银负载量对网状TiO柔性薄膜电极储锂性能的影响

采用水热法结合银镜反应制备出一系列不同Ag负载量（2.2%、4.0%、6.4%,w/w）改性的3D纳米网状结构Ag@Ti O2薄膜电极。利用电感耦合等离子体技术（ICP）、X射线衍射（XRD）、扫描电镜（SEM）、透射电镜（TEM）和X射线能谱（EDX）等表征手段测试所合成材料的形貌及成分,实验结果表明Ag纳米颗粒可以成功沉积在Ti O2纳米线表面。电化学测试数据则表明,4.0%（w/w）负载量的Ag@Ti O2相比于未改性和其他负载量的Ti O2纳米线具有更好的倍率性能和更稳定的可逆容量。在50,100,200,400,800和1 200 m A·g的电流密度条件下,该改性电极的放电容量可分别达到261.4,253.7,239.5,216.5,193.1和185.1 m Ah·g,在200 m A·g下循环80次后容量保持率仍能达到99.8%。国家自然科学基金(No.51604132)资助项目

Effect of Loading Content of Silver on Lithium Storage for TiO2 Net-Work Flexible Film Electrode

采用水热法结合银镜反应制备出一系列不同Ag负载量(2.2%、4.0%、6.4%,; w/w)改性的3D纳米网状结构Ag@TiO_2薄膜电极。利用电感耦合等离子体技术(ICP)、X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(; TEM)和X射线能谱(EDX)等表征手段测试所合成材料的形貌及成分,实验结果表明Ag纳米颗粒可以成功沉积在TiO_2纳米线表面。电化学测试数据则; 表明,4.0%(w/w)负载量的Ag@TiO_2相比于未改性和其他负载量的TiO_2纳米线具有更好的倍率性能和更稳定的可逆容量。在50,100,; 200, 400, 800和1 200 mA·g~(-1)的电流密度条件下,该改性电极的放电容量可分别达到261.4,253.7,239.5,; 216.5, 193.1和185.1 mAh·g~(-1),在200 mA·g~(-1)下循环80次后容量保持率仍能达到99.8%。A series of silver-modified TiO(2)flexible film electrodes with hierarchical 3D nano-network structure are facilely synthesized using hydrothermal method followed via the traditional silver mirror reaction. Successful deposition of Ag nanoparticles on to the TiO2 nanowires surface is confirmed by inductively coupled plasma (ICP) technique, X-ray diffraction (XRD), scanning electron microscope (SEM) with energy-dispersive X-ray analysis (EDX) and transmission electron microscopy (TEM). The electrochemical properties of the Ag@TiO2 nanowires were researched in this work. Our results show that the Ag@TiO2 nanowires with 4.0% (w/w) silver exhibits a better rate performance and more excellent reversibility than pristine one. At different current densities of 50, 100, 200, 400, 800 and 1 200 mA . g(-1), the discharge capacities of the Ag@TiO2 electrodes are 261.4, 253.7, 239.5, 216.5, 193.1 and 185.1 mAh . g(-1), respectively. After 80 cycles at 200 mA . g(-1), its discharge capacity retention is 99.8% indicating Ag@TiO(2)electrodes are potentially useful for LIBs.国家自然科学基金(N0.51604132）资助项目

基于风险管控的电力营销稽查模型研究

电力营销稽查工作是电力管理重要环节之一。基于风险管控的电力营销模型使用电力营销业务全样本数据,通过挖掘线路、台区的售电、供电以及用户电量之间的变化关系,构建线路台区及用户的风险指数,为电力营销稽查人员的稽查工作提供稽查方向,避免了传统营销稽查样本代表性不足及事后稽查等问题,提升了稽查效率及精度

Electrodeposition and Electrochemical Properties of Ternary Sn-Co-Zn Alloy Electrodes as Anodes for Lithium-Ion Batteries

Corresponding author. Email: [email protected]; Tel: +86-592-5343629.[中文文摘]运用电沉积技术制备出Sn-Co-Zn合金电极材料.采用X射线衍射(XRD)和扫描电子显微镜(SEM)分析了该合金材料的相结构和表面形貌.通过循环伏安和电位阶跃实验研究了Sn-Co-Zn合金的电沉积机理,实验表明,Sn-Co-Zn合金电沉积按扩散控制连续成核和三维生长方式进行.XRD结果表明,该合金由CoSn3、Co3Sn2和Zn组成.电化学性能测试表明:Sn-Co-Zn合金电极首次放电(脱锂)容量达751mAh·g-1,首次循环的库仑效率为88%;30周循环之后放电容量为510mAh·g-1.该Sn-Co-Zn合金电极良好的电化学储锂性能可能归因于材料的多相结构.[英文文摘]A ternary Sn-Co-Zn alloy film was successfully prepared by electrodepositi on copper foil. Electrochemical deposition of the Sn-Co-Zn alloy was studied by cyclic voltammetry (CV) and chronoamperometry (CA). The structure and electrochemical performance of the electroplated Sn-Co-Zn alloy electrodes were also investigated in detail. The CV and CA results revealed that the initial deposition kinetics of the Sn-Co-Zn alloy corresponds to a model that includes a three-dimensional progressive nucleation and diffusion controlled growth. XRD results showed that the electrodeposited Sn-Co-Zn alloy consists of CoSn3, Co3Sn2, and Zn phase. Electrochemical tests indicated that at the first cycle, the discharge capacity (desertion) and columbic efficiency are measured 751 mAh·g-1 and 88%, respectively, at the 30th cycle, the Sn-Co-Zn alloy electrodes still delivered a discharge capacity of 510 mAh·g-1. The good lithium storage performance of the Sn-Co-Zn electrode is ascribed to multi-phase structure of the electrode.国家自然科学基金(20773102);国家基础研究重大项目计划(973)(2009CB220102)资

一种带有误差补偿项的折线线圈阻抗解析建模新方法

提出一种包含误差补偿项的任意折线线圈阻抗解析新模型。首先,在前人研究的基础上,通过定义外形位置因子,简化单矩形折线线圈的阻抗计算。其次,对多个单矩形折线线圈之间的相交耦合作用进行研究,建立串联等效电感模型。再次,讨论任意形状折线线圈的拆解和重构过程,研究重构过程的误差分布,并推导出误差补偿的数学表达;进而得到任意形状折线线圈的入射场阻抗及散射场阻抗的完整解析模型。最后,对螺线形折线线圈这一典型特例进行计算,绘制阻抗平面图,并利用高精度阻抗测试仪进行物理验证实验。结果表明,所提方法能有效补偿线宽因素带来的误差,可对置于导体上方的具有不同激励频率和提离的任意形状折线线圈的阻抗进行解析计算。国家自然科学基金(51177141);;航空基金(2012ZD68003

Electrochemical Corrosion Behavior of Nickel-base Alloy Coatings in Hydrochloric Acid

在含有硫酸镍、钨酸钠和柠檬酸三铵的电解液中获得镍-钨合金电沉积层。在分别含有二甲基胺硼烷和二氧化锆粒子的上述电解液中,电沉积获得Ni-W-B合金和Ni-W-(ZrO2)复合镀层。采用电化学实验方法研究所获得的Ni-W、Ni-W-B和Ni-W-(ZrO2)镀层在盐酸介质中的腐蚀行为,结果表明:所获得的镀层均有较好的耐蚀性;Ni-W和Ni-W-B镀层比Ni-W-(ZrO2)镀层有较好的抗腐蚀能力。Ni-W alloy was electrodeposited from the electrolyte solution containing sodium tungstate, nickel sulfate and ammonium citrate. Ni-W-B alloy and Ni-W-(ZrO_2) composite coating were electrodeposited from the Ni-W electrolyte solution containing dimethylamine borane and zirconia particles respectively. The corrosion behavior of th Ni-W, Ni-W-B and Ni-W-(ZrO_2) coatings in the medium of hydrochloric acid were studied by the electrochemical method. The results showed that all the obtained coatings presented in good corrosion resistance. Ni-W and Ni-W-B coatings appeared in the better anti-corrosion ability compared to Ni-W-(ZrO_2) composite coating.国家自然科学基金(29773039);; 福建省自然科学基金(EO210005

Preparation and performance of Sn-Co-Zn nanorods array alloy electrode

采用液相法制备铜纳米棒阵列,并用作锂离子电池负极集流体,通过电沉积制备Sn-CO-zn纳米棒阵列合金电极。合金电极主要是由CO Sn、CO Sn2和单质zn组成的混晶。以1 C在0.02~1.50 V循环,合金电极首次循环的放电比容量为813.8 M AH/g,库仑效率为87.5%,第50次循环的放电比容量为467.0 M AH/g。电极活性材料多相结构及纳米阵列间隙,可缓解嵌锂过程中的体积膨胀。Copper nanorods array was prepared by liquid phase reaction and used as anode current collector material for Li-ion battery.Sn-Co-Zn nanorods array alloy electrode was prepared by electrodeposition.The alloy electrode was the mixed crystal mainly composed of CoSn,CoSn2 and Zn.When cycled in 0.02 ~ 1.50 V with 1 C,the specific discharge capacity of alloy electrode in initial cycle was 813.8 m Ah / g,the columbic efficiency was 87.5%,the specific discharge capacity in 50 th cycle was 467.0 m Ah / g.The multi-phase structure of electrode material and the nanorods array could alleviate the volume expansion during lithium intercalation

Studies on Cu-Ni alloy electroless plating using sodium hypophosphite as reductant

研究了以次磷酸钠为还原剂的化学镀铜过程。分析了温度、pH、硫酸镍含量对化学镀铜沉积速率的影响及镀层的表面形貌和结构。结果表明,沉积速率随着镀液温度、pH和N i离子浓度的提高而增大。镀层组分含量和XRD实验结果表明镀层为铜镍合金,呈面心立方结构,晶面间距d与晶胞参数a与标准Cu-N i的相比略大。SEM实验表明,镀层表面形貌为团粒状,颗粒大小较不均匀。The process of the electroless copper plating(using) sodium hypophosphite as reductant was studied.The influences of temperature,pH,nickel sulphate content on deposition rate of copper electroless plating as well as the surface morphology and structure of the deposit were(analyzed.)The results show that the deposition rate is(accelerated) with increasing bath temperature,pH value and the concentration of nickel ion.Both deposit composition and XRD results indicate that the deposits are Cu-Ni alloy with face-centered cubic structure.Its structural parameters of d and a are slightly larger than that of the standard Cu-Ni(alloy).SEM experiment displays that the deposit has a(surface) morphology of granular structure with uneven grain sizes.国家科技攻关计划项目(2004BA325C