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Search Results: 1 - 10 of 329843 matches for " <br>廖燕平 "
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Advance in studies on molecular mechanism and regulatory factors of microcystin detoxication in aquatic organism
水生生物对微囊藻毒素去毒分子机理及调控因子研究

YU Yan,LIANG Xu-Fang,LIAO Wan-Qin,HAN Bo-Ping,<br>于,梁旭方,婉琴,韩博
水生生物学报 , 2007,
Abstract: 近年来,随着工农业的不断发展,排入水体的各种污染物不断增加,加速了淡水水域的富营养化进程,使得浮游藻类大量繁殖,有害藻类水华频繁发生,世界各地不断有藻类污染水体引起人畜患病甚至死亡的事件报道。在淡水藻类中,毒性最强、污染范围最广的为蓝藻门,第一段]
DISTRIBUTION,DECOMPOSITION AND NUTRIENT RETURN OF THE FINE ROOT IN PURE Cunninghamia lanceolata, Michelia macclurei AND THE MIXED PLANTATIONS
杉木(Cunninghamia lanceolata)、火力楠(Michelia macclurei)纯林及其混交林细根分布、分解与养分归还

LIAO Li Ping,<br>
生态学报 , 1999,
Abstract: Soil corer was used to investigate the distribution of fine root and a traditional method of nylon litter bag to measure the decomposition in pure Cunninghamia lanceolata and Michelia macclurei var Sublanea ,and the mixed plantations.Nutrient returns of N,P,K,Ca and Mg in the above three plantations were estimated based on the decomposition experiment.The vertical distribution of live fine root for pure M.macclurei stand was the most superficial,the mixed stand was intermediate,pure C.lanceolata was the least.The fine root of M.macclurei decomposed more quickly than that of C.lanceolata because of its higher original nutrient content and lower C:N ratio.Nutrient return from fine root was largest in pure M.macclurei ,the mixed stand intermediate,and pure C.lanceolata the least.In the mixed stand,returns of N,P,K,Ca and Mg from fine root decomposition were 33 38%,5 82%,269 33%,34 12% and 376 08% of that from decomposition of leaf and twig litter respectively.It is suggested that fine root plays an important role in nutrient cycling of the stands.
Nickel-disilicide-assisted excimer laser crystallization of amorphous silicon
Liao Yan-Ping,Shao Xi-Bin,Gao Feng-Li,Luo Wen-Sheng,Wu Yuan,Fu Guo-Zhu,Jing Hai,Ma Kai,<br>,邵喜斌,郜峰利,骆文生,吴 渊,付国柱,荆 海,马 凯
中国物理 B , 2006,
Abstract: Polycrystalline silicon (poly-Si) thin film has been prepared by means of nickel-disilicide (NiSi$_{2})$ assisted excimer laser crystallization (ELC). The process to prepare a sample includes two steps. One step consists of the formation of NiSi$_{2}$ precipitates by heat-treating the dehydrogenated amorphous silicon (a-Si) coated with a thin layer of Ni. And the other step consists of the formation of poly-Si grains by means of ELC. According to the test results of scanning electron microscopy (SEM), another grain growth model named two-interface grain growth has been proposed to contrast with the conventional Ni-metal-induced lateral crystallization (Ni-MILC) model and the ELC model. That is, an additional grain growth interface other than that in conventional ELC is formed, which consists of NiSi$_{2}$ precipitates and a-Si. The processes for grain growth according to various excimer laser energy densities delivered to the a-Si film have been discussed. It is discovered that grains with needle shape and most of a uniform orientation are formed which grow up with NiSi$_{2}$ precipitates as seeds. The reason for the formation of such grains which are different from that of Ni-MILC without migration of Ni atoms is not clear. Our model and analysis point out a method to prepare grains with needle shape and mostly of a uniform orientation. If such grains are utilized to make thin-film transistor, its characteristics may be improved.
Video Management Using Oracle Database
Oracle数据库管理视频信息

Wen Yanping,<br>文
现代图书情报技术 , 2004,
Abstract: The store and retrieval of digital video documents are important parts of video management. The article analyzes the data model of video in Oracle database, presents an example to show how to store and retrieve the video using Oracle8i interMedia.
Research on Content-based Image Retrieval System
基于内容的图像检索系统研究

Wen Yanping,<br>文
现代图书情报技术 , 2001,
Abstract: The article reviews the development of image retrieval system, and summarizes the technology and current state of image retrieval, especially of content-based image retrieval. It discusses the key technology in Content-based Image Retrieval System(CBIRS). After introducing some famous CBIRS, it gives a new type of CBIRS.
Growth, distribution and exudation of fine roots of Chinese fir trees grown in continuously cropped plantations
不同连栽代数杉木人工林细根生长、分布与营养物质分泌特征

LIAO Li-Ping,<br>
生态学报 , 2001,
Abstract: 用土钻法研究了不同连栽代数杉木细根生长与分布,结果表明,杉木连栽1代后,细根生物量明显减少,第1代杉木活细根生物量的范围为646.4-799.7g.m-2,而第2代则为284.4-536.9g.m-2,在一定距离范围内,离树体的距离越远,细根分布越少,杉木连栽后,主要减少了表层土壤(0-10cm)细根的生长,根系分泌物的分析表明,杉木连栽1代后,根系阳离子NH4+,Na ,K ,Ca2 ,Mg2 的分泌量没有变化,而阴离子NO3-,Cl-,SO4 2-,HPO4^2-,的量都减少,但只有Cl-和HPO4^2-差异显著(P<0.05),第2代杉木根系分泌物中的HPO4^2-量仅为第1代的1/65,根-土界面磷交换过程的阐明有利于说明第2代杉木根系HPO4^2-分泌量减少的原因,杉木连栽后,表层土壤细根生长的减少和根系分泌行为的改变可能是生产力下降的重要原因。
古建筑圆柱形木构件内部缺陷筛查方法研究
春晖,张厚江,黎冬青,,王喜
北京林业大学学报 , 2013,
Abstract: 为了快速、有效地筛查出古建筑木构件内部的缺陷,并估算其大小(尺寸),使用Fakopp应力波检测仪和微钻阻力仪,在尽可能小的损伤情况下,快速筛查古建筑圆柱形木构件内部缺陷及其大小(尺寸)。并选取北京市古建筑常用木材落叶松(圆盘)进行验证试验。结果表明,利用Fakopp应力波检测仪和微钻阻力仪可以现场筛查古建筑木构件的内部缺陷及其大小(尺寸)。
钦州市钦南区2009~2013年疟疾防治效果分析
,开周,张达,郭继昌
中国热带医学 , 2014,
Abstract: 目的分析钦州市钦南区2009~2013年疟疾防治效果,为钦州市钦南区制定消除疟疾策略提供科学依据。方法收集2009~2013年疟疾监测数据并进行统计、分析。结果2009~2013年共血检当地居民3989人,五年平均血检率达到辖区总人数的1.75‰,未检出疟原虫阳性者。共血检流动人员3536人,查出疟原虫阳性者3人,总疟原虫阳性率为0.08%,但流动人员发热病人血检阳性率为0.42%;疟原虫阳性病例来自外出归来流动人员,3例病人分别是从非洲安哥拉、加纳和塞拉利昂三个国家返回的流动人员,全部为恶性疟;病例报告、治疗和流行病学个案调查率均达到100%;疫点处置率为100%;各级业务人员培训率为100%。结论钦州市钦南区是以输入性疟疾为主,加强外出返乡流动人口疟疾监测是巩固防治成果的关键。
小型化紧凑型高功率宽谱源
张晋琪,,,吴朝阳,徐刚,陆巍,丁恩
强激光与粒子束 , 2014,
Abstract: ?分析改进了电感隔离型重频marx发生器整体电路和主元件排列,实现了自建立和结构紧凑的发生器。优化设计了谐振器的对地开关和耦合器,提高了谐振器的输出效率。通过实验研究得出:宽谱源辐射因子175kv,重复频率20hz,中心频率300mhz,百分比带宽22%。该源体积小于0.2m3,重量约200kg。通过系统集成,使整套系统具备了可移动、整体360°旋转和远程控制等功能。
超声波辅助固体酸催化塔尔油脂肪酸制备生物柴油
林炎,陈学榕,黎邵华,,黄 彪
燃料化学学报 , 2011,
Abstract: ?将强酸性阳离子交换树脂加入塔尔油脂肪酸和甲醇混合液中,并在超声波辐射辅助下得到生物柴油,对生物柴油的制备工艺和性能进行研究,同时建立动力学模型。结果表明,超声波辐射的辅助强化,能有效提高生物柴油的得率;在反应温度65℃、反应时间1h、甲醇与tofa摩尔比为10∶1、脱水剂用量为tofa6%、树脂nkc-9用量为tofa40%的最佳工艺条件下,反应平衡常数可达11.18,生物柴油得率为90.0%。建立的动力学模型补充了超声波辐射辅助酯化反应动力学参数,并用此模型解释了各工艺参数呈现的规律。以廉价的制浆黑液回收物塔尔油脂肪酸为原料制备生物柴油,能有效地降低生物柴油价格,提高其市场竞争力,实现塔尔油高附加值利用,具有良好的发展前景。
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