Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 61 )

2018 ( 1741 )

2017 ( 1630 )

2016 ( 1674 )

Custom range...

Search Results: 1 - 10 of 113487 matches for " LIU Hong-ge "
All listed articles are free for downloading (OA Articles)
Page 1 /113487
Display every page Item
A Context-Based Talker

LIU Hong-Ge,

计算机科学 , 2003,
Abstract: In order to make computer understand human languages much better and achieve certain tasks according to human intentions, it is required to carefully model the elementary concepts and the underlying theoretical principles for driving a conversation generating and developing. Under the given linguistic circumstances, to some extent, it might be hopeful to build up a computational model which can predict and control the sustaining development of conversational activity. This paper is going to make a formalized primary discussion on contextual features which influence conversational activity, design an algorithm processing ellipses, and build a Context-Based Talker (CBT). The empirical analysis shows, to some extent, CBT can control and guarantee the coherence and natural development of conversational activity.
Phase Behavior of Sphere-Forming Triblock Copolymers in Films  [PDF]
Hong-Ge Tan, Qing-Gong Song, Xin-Huan Yang, Ya-Jing Deng
Open Journal of Applied Sciences (OJAppS) , 2012, DOI: 10.4236/ojapps.2012.23023
Abstract: The self-assembly of sphere-forming triblock copolymers confined between two thin homogeneous surfaces is investigated based on mean-field dynamic density functional theory. The morphologies deviating from the bulk sphere-forming phase are revealed, including cylinders oriented perpendicular to the surface, cylinders oriented parallel to the surface, perforated lamellae and lamellae by varying film thickness and surface field strength. The phase diagram of surface reconstruction is also constructed. By comparing the present phase diagram with the other relevant phase diagram for the cylinder-forming triblock copolymer film, the difference between the sphere-forming and the cylinder-forming triblock copolymer thin film is discussed.
Phenolic compounds accumulation in continuously cropped Rehmannia glutinosa soil and their effects on R. glutinosa growth

WU Zong-wei,WANG Ming-dao,LIU Xin-yu,CHEN Hong-ge,JIA Xin-cheng,

生态学杂志 , 2009,
Abstract: 为了探究酚酸物质与地黄连作障碍之间的关系,检测了重茬地黄土壤中阿魏酸、香草酸、香草醛和对羟基苯甲酸等4种酚酸物质的积累量,并通过水培条件下添加酚酸,研究了4种酚酸对地黄生长的影响。结果表明:阿魏酸、香草酸和香草醛含量在地黄生长期表现为持续增加,而对羟基苯甲酸含量先升高后降低;外加阿魏酸(8 μg·ml-1)、香草酸(0.8 μg·ml-1)、香草醛(1.2 μg·ml-1)和对羟基苯甲酸(3.0 μg·ml-1)对水培地黄根长、根质量、全株鲜质量和株高有较强的抑制作用;酚酸处理使地黄叶片叶绿素含量降低,除对羟基苯甲酸外差异性极显著;经过酚酸处理的地黄幼苗SOD和POD活性为先升高后下降,丙二醛含量升高,其中阿魏酸的处理使根中酶活性降至最低,根部腐烂死亡。推测4种酚酸可能是造成地黄化感作用的物质。
Comparing principles and efficiency of different methods for available potassium extraction

LIU Hong-ge,WANG Huo-yan,ZHOU Jian-min,DU Chang-wen,CHEN Xiao-qin,

土壤 , 2012,
Abstract: Principles and factors affecting the efficiency of different methods for extracting available K from six potassium-bearing minerals were investigated in current study.These methods included salt solutions,cation exchange resins and NaBPh4 methods.The results showed that the effectiveness of K extraction from minerals by salts was mainly dependent on the ion type, concentration and pH value of the solution.Different salts had different preferential effect on K release from various minerals.NH1+ saturation led to the collapse of the interlayer structure of the minerals and restrained non-exchangeable K(NEK) release remarkably.The effectiveness of K extraction by cation exchange resins method was mainly related to the ion type used to saturated resin beads and somewhat to the shaking speed used.Comparing with Ca2+,H+ and Na+ saturated resin had stronger K exchanging capacity from solution. For eliminating the effect of film mass transfer resistance on K exchange by resins,a shaking speed higher than 120 r/min was recommended.The solubility product constant of KBPh4 was 2.40×10-8(25℃) based on the data got in current study.Without NaCI, NaBPh4 concentration was the main factor affecting the effectiveness of K extraction from minerals.According to the mechanism and efficiency of different methods,ammonium salts are suitable for evaluating K availability in soils with high content of exchangeable K. However,non-ammonium salts which can extract a small portion of NEK under long time extraction procedure,is superior to ammonium acetate to evaluate K availability in soils containing NEK available to crop.Cation exchange resins which can also extract NEK are more suitable for in situ research of soil K movement,but the procedure is relatively tedious.Different portion of NEK could be efficiently extracted with the NaBPh4 method via modification of the K extracting power of the method.The NaBPh4 method is assumed to be a good method for evaluation of available K in various soils in future.
Synthesis and Performance of LiFePO4/C Prepared with Nonaqueous Sol-Gel Method

FAN Jun-Liang,PAN Hong-Ge,GAO Ming-Xia,LIN Yan,LIU Ji-Qiang,

无机材料学报 , 2007,
Abstract: 以乙二醇为溶剂,采用溶胶一凝胶法合成了LiFePO4/C.采用X射线衍射、扫描电镜、透射电镜和电化学阻抗谱等分析测试方法,研究了600-750℃范围内合成的LiFePO4/C的微观结构特征、在不同放电倍率下的循环稳定性和放电容量等电化学性能.研究结果表明,合成温度对LiFePO4的结晶状况及LiFePO4/C电极的电化学性能有着显著的影响.700℃烧结的产物结晶完整,颗粒细小(-150nm)均匀,电化学性能有了显著的提高,0.5C的放电容量达到150mAh/g,1C的放电容量仍有141mAh/g,经200个循环,放电容量基本保持不变.
Electrochemical Performance of Crystalline Li12Si7 as Anode Material for Lithium Ion Battery

YANG Ya-xiong
, MA Rui-jun, GAO Ming-xia, PAN Hong-ge, LIU Yong-feng

- , 2016, DOI: 10.13208/j.electrochem.160541
Abstract: 摘要 通过加热摩尔比为12:7的LiH/Si球磨混合物,避免了Li与Si之间巨大的熔点差异,成功制备了晶态Li12Si7合金,研究了其电化学性能和储锂机制. 发现Li12Si7在0.02 ~ 0.6 V的嵌脱锂过程中,只发生晶胞体积的变化,而不产生相变,呈现出明显的固溶储锂机制. 该固溶储锂机制的存在,有效抑制了Si基负极材料嵌脱锂过程中由于相变导致的体积效应,使得晶态Li12Si7在0.02 ~ 0.6 V电压范围内具有显著改善的电化学性能,其首次库伦效率高达100%,30次循环后的可逆容量保持率约为74%,分别优于相同条件下原始Si电极的55%和37%.
Crystalline Li12Si7 is successfully synthesized by heating the mixture of LiH and Si with a molar ratio of 12:7, which avoids the huge difference of the melting points between Li and Si. The electrochemical performance and lithium storage mechanism of the as-prepared Li12Si7 are studied in this work. It is found that only a change in cell volume takes place without a phase change during the lithiation/delithiation of Li12Si7 at a voltage range of 0.02 ~ 0.6 V, exhibiting a solid-solution lithium storage mechanism. Such a lithium storage process effectively retards the volume effect caused by the phase change during lithiation/delithiation of Si-based anode. This induces significantly the improved electrochemical properties of crystalline Li12Si7 while cycling at 0.02 ~ 0.6 V. The first Coulombic efficiency of crystalline Li12Si7 is determined to be as high as 100%, and the capacity retention is 74% after 30 cycles, which are distinctly higher than those of Si anode (55% and 37%, respectively) under identical conditions
Investigation on Performances of the Novel Ammonia-based Hydrogen Storage Material CaCl2

LIN Ren-Bo,LIU Yong-Feng,GAO Ming-Xia,WANG Jian-Hui,GE Hong-Wei,PAN Hong-Ge,

无机材料学报 , 2008,
Abstract: 研究了工作温度、起始氨压和球磨处理对无水CaCl2的吸放氨性能的影响. 结果发现, 球磨2h样品在温度20℃和氨压0.55MPa的条件下, 15min内即可完全氨化, 形成CaCl2(NH3)8, 其吸氨量可达55.1wt%, 相当于储氢量9.72wt%. CaCl2(NH3)8在20~300℃的范围内可通过三步反应实现完全脱氨, 脱氨反应受温度和压力控制, 其中6个NH3分子在常温、常压下即可脱附. 如果与NH3分解催化剂联用, 可能是一种较好的以NH3为介质的高容量储氢材料. 进一步研究表明, 较高的工作温度和起始氨压可以提高CaCl2的吸氨动力学性能, 而球磨时间的增加可以显著降低其放氨工作温度, 提高其放氨动力学性能.
Nano-scale Ce0.8Y0.2O1.9 Powders Prepared by Low Temperature Combustion Synthesis Technique
低温燃烧合成法制备 Ce0.8Y0.2O1.9 纳米粉体

XU Hong-Mei,YAN Hong-Ge,CHEN Zhen-Hua,

无机材料学报 , 2006,
Abstract: Nanocrystalline Ce0.8Y0.2O1.9 technique using citric acid as reductant and solid solution was synthesized by a gel combustion nitrates as oxidants. The effects of processing parameters, such as the amount of citric acid, the pH value of solution, the amount of oxidants on the gel formation and the powders characteristics of the product were investigated by using TG/DTA, XRD, FTIR, Raman and TEM. The stable gel was obtained by controlling the amount of citric acid and the pH value. The nanocrystalline Ce0.8Y0.2O1.9 powders in the range of 5nm to 40nm were obtained by changing the amount of oxidants. The Raman investigation showed that the oxygen vacancy concentration increased with the increase of the amount of oxidants.
Self-balance control of two-wheeled robot based on Skinner''s operant conditioned reflex

REN Hong-ge,RUAN Xiao-gang,

控制理论与应用 , 2010,
Abstract: 针对两轮自平衡机器人的运动平衡控制问题, 采用了基于Skinner操作条件反射理论的自回归神经网络学习算法作为机器人的学习机制, 利用自回归神经网络对评价函数进行逼近, 以实现对行为决策的优化, 从而使机器人能够在无需外部环境模型的情况下, 通过学习和训练, 获得像人或动物一样的自主学习技能, 解决了两轮机器人的运动平衡控制问题. 最后分别在无扰动和有扰动的两种状态下设计了仿真实验并进行了比较. 结果表明, 该操作条件反射学习机制具有较快的自主平衡控制技能和较好的鲁棒性能, 体现了较高的理论研究意义和工程应用价值.
Two-wheeled self-balancing mobile robot dynamic model and balancing control

RUAN Xiao-gang,REN Hong-ge,

计算机应用研究 , 2009,
Abstract: Aiming to the two-wheeled self-balancing mobile robot system with high-rank, unstable, multi-variable, strongly coupling, complicated dynamic nonlinear property,this paper established the dynamic model applied Lagrange program, and carried on the stability and the controllability judgment to it. Based on this model, using LQR and the Dragon Bergh extreme disposition method carried on the control to the two-wheeled self-balancing mobile robot in the posture and the speed, and obtained the stable dynamical balance process. Listed some material steps at establishing the mathematics model, and used above two methods to do the simulation research and the comparison separately. It indicates through the simulation experiment that the two control method to the robot stable control all are effective. Dragon Bergh extreme disposition control method causes the system that the track speed to be quicker, the stability is higher, and it has the high practical application value.
Page 1 /113487
Display every page Item

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