Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 42 )

2018 ( 448 )

2017 ( 453 )

2016 ( 434 )

Custom range...

Search Results: 1 - 10 of 33070 matches for " FENG Langang "
All listed articles are free for downloading (OA Articles)
Page 1 /33070
Display every page Item
Evaluating Mineral Resources Exploitation Efficiency with Sequential Data Envelopment Analysis

DU Qinjun
,WU Jianzhang,FENG Langang,DONG Zhiliang

- , 2015,
Abstract: 摘要 从劳动力投入、资本投入、土地等自然资源投入,经济效益产出、环境效益产出等方面来构建矿产资源开发评价指标体系。采用逐次数据包络分析(SDEA)方法来确定各级效率前沿面,实现对各决策单元的矿产资源开发效率的分级划分。 以河北省2011年各县区铁矿资源开发效率评价,实例验证了指标体系的可用性与SDEA方法的有效性
Simultaneous determination of kynurenine and kynurenic acid in serum by high performance liquid chromatography-fluorescence detection

XIAO Ledong,TANG Aiguo,MO Ximing,LUO Xibo,PI Langang,

色谱 , 2009,
Abstract: 建立了在线衍生、双波长高效液相色谱-荧光检测器同时检测血清中犬尿氨酸(kynurenine, Kyn)和犬尿喹啉酸(kynurenic acid, KYNA)含量的方法.血清标本经5%高氯酸溶液去除蛋白质后,上清液直接进样分析测定.采用的色谱柱为Hypersil C8柱;流动相为0.25 mol/L 醋酸锌-50 mmol/L 醋酸溶液(含3%乙腈),流速为1.5 mL/min.在0~10 min时间段,在激发波长和发射波长分别为365 nm和480 nm时检测Kyn;10 min后,在激发波长和发射波长分别变换为344 nm和404 nm时检测KYNA.Kyn的保留时间约为8.1 min,线性范围为98~19600 nmol/L,最低检出浓度为50 nmol/L,平均回收率为94.88% ,日内、日间测定值的相对标准偏差(RSD)均低于4% .KYNA的保留时间约为13.0 min,线性范围为2.62~1047 nmol/L,最低检出浓度为0.11 nmol/L,平均回收率为102.72% ,日内、日间测定的RSD均低于4% .苯丙氨酸、酪氨酸、色氨酸和 5-羟色胺等物质对目标物的检测无干扰.71例健康成人血清中,Kyn和KYNA含量分别为(1.40±0.34) μmol/L 和(24.22±8.67) nmol/L.该方法简便、快速、灵敏、特异,适于临床和科研应用.
The Analysis on Financial Cooperative Controlling Mechanism of Enterprise Group  [PDF]
Ziqin Feng
iBusiness (IB) , 2010, DOI: 10.4236/ib.2010.24053
Abstract: As the core of modern market economy, enterprise group is an advanced form of organization after productive forces reached to a certain stage. For the reason of complexity and specificity of organizational form of enterprise group, the issue of financial cooperative control has been widespread concerned by theorists. Although many researches have been done, but there are still lacking of systematic research results especially in the fields of mechanism of financial cooperative control. After exploring the relationship of value effect and financial control, this paper puts forword a system model of financial cooperative control. It also gives a system analysis including system hierarchy analysis, synergy analysis and coupling analysis. All of these can provide a decision making support for the collaborative mana- gement of enterprise group.
Reconfigurable Logistics Information System Based on Soft Components Technology  [PDF]
Feng Liang
Journal of Service Science and Management (JSSM) , 2008, DOI: 10.4236/jssm.2008.12016
Abstract: Logistics information system should be reconfigurable, open and extensible to support the total supply chain. Soft com-ponent technology is introduced to design and build the logistics information system oriented to the business demand of kinds of supply chains. When the supply chain is changed, logistics information system organizes all kinds of required logistics resources, by recalling predefined soft components to dynamically configure logistics information system, which can ensure quick respond to the changes of supply chain demand and support dynamic reconfiguration of the logistics information system. In this paper, a method of reconfiguration of logistics information system by using soft component technology is proposed. The key problems to the subject domain are investigated and an illustrative case study is presented.
Dynamic Neural Network Based Nonlinear Control of a Distillation Column  [PDF]
Feng Li
Intelligent Control and Automation (ICA) , 2011, DOI: 10.4236/ica.2011.24043
Abstract: Taking advantage of the knowledge of top and bottom compositions of a distillation column, a dynamic neural network (DNN) is designed to identify the input-output relationship of the column. The weight-training algorithm is derived from a Lyapunov function. Based on this empirical model, a nonlinear H controller is synthesized. The effectiveness of the control strategy is demonstrated using simulation results.
Finite Type Transcendental Entire Functions Whose Buried Points Set Contains Unbounded Positive Real Interval  [PDF]
Feng Guo
Advances in Pure Mathematics (APM) , 2014, DOI: 10.4236/apm.2014.45027

Let fμ(z)=z·ep(z)+μ with p(z)

Spatial Meaning of Quantum Mechanics  [PDF]
Yougang Feng
Natural Science (NS) , 2014, DOI: 10.4236/ns.2014.614103
Abstract: We provide theoretical evidence for that remains far from clear in Copenhagen interpretation, and then try to make it further complete. Uncertainty relations are proved to be the intrinsic attributes of the position-momentum space and the time-energy space. A theoretical evidence for the probabilistic interpretation is given. Different meanings of the wave-particle duality for the photons and for the electron are discussed.
The Challenges Moutai Faces When Developing Its UK Market  [PDF]
Feng Li
American Journal of Industrial and Business Management (AJIBM) , 2014, DOI: 10.4236/ajibm.2014.411072
Abstract: As Chinese government has been started a movement that encourages consumers to save more and fight against waste, the sales of Chinese spirits have dropped off in domestic markets. In order to increase sales and brand equity in the world alcohol industry, the Chinese spirits suppliers have to explore new markets and find opportunities in the US and Europe. Some famous liquor’s brands, such as Moutai, have already put more emphasis on overseas markets than before and aim to outsource more products to increase the market share. Therefore, this paper aims to find barriers for Moutai to enter into the UK market, identify its target customers, find strategic solutions to penetrate into the UK market and achieve its market goals.
Equivalence Transformations among Ising Models  [PDF]
Yougang Feng
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.61003
Abstract: Using topology, fractal analysis and investigation of lattice formation process we find two types of equivalence transformations among Ising models: topological equivalence transformation and formation equivalence transformation. With the help of the transformations and the known data of the critical points of simple cubic (sc) lattice and planar square (sq) lattice we get directly the critical points for face-centered cubic (fcc) lattice, body-centered cubic (bcc) lattice and diamond (d) lattice. The transformation itself results no error in the calculation. Other than Monte Carlo method and series expansion approach the equivalence transformations help us simplify much more greatly the calculation of the critical points for the three-dimensional models and understand much more deeply the structural connection among Ising models.
Classical Unified Field Theory Relating to Electricity and Mass  [PDF]
Yougang Feng
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.65062
Abstract: A classical unified field theory relating to electricity and mass is proposed. It indicates that uncertainty relations are the intrinsic attributes of space-time, and the law of the uncertainty quantities’ change can be described by the potential functions of the space-time. The electromagnetic field is a stimulated state of the space-time, associated with electricity; its behaviors exhibit the properties of the positive potentials \"\" and \"\"
Page 1 /33070
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.