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Search Results: 1 - 10 of 311158 matches for " <br>方惠斌 "
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文献学学科体系论略
,
图书情报工作 , 1997,
Abstract: ?论述文献学的研究对象及文献学学科体系的实现途径。
经费短缺:图书馆面临的困境与抉择
,
图书情报工作 , 1998,
Abstract: ?论述图书馆面临的经费困境及影响,并分析其原因,提出走出困境的对策。
Preparation and mechanism of Fe-K/AC for catalytic oxidation of hydrogen sulfide
Fe-K/AC催化氧化脱硫剂制备及反应机理研究

FANG Hui-bin,ZHAO Jian-tao,WANG Sheng,HUANG Jie-jie,FANG Yi-tian,<br>,赵建涛,王胜,黄戒介,房倚天
燃料化学学报 , 2012,
Abstract: Modified activated carbon Fe-K/AC(activated carbon supported iron and potassium) was used as an oxidation catalyst for low concentration hydrogen sulfide(H2S) removed.The orthogonal design method was introduced in the research of Fe-K/AC preparation to determine the optimum condition and to measure the impact of different factors.Then,catalytic activity and mechanism on Fe-K/AC catalyst for oxidation of hydrogen sulfide was investigated.The optimum preparation condition of Fe-K/AC with high sulfur capacity and selectivity is that the iron and potassium content is 0.5% and 5.0%,respectively;and the calcination temperature and the Fe2+/Fe3+ atomic ratio is 600 ℃ and 0.5,respectively.The order of their influences is potassium content > iron content > calcination temperature > Fe2+/Fe3+ atomic ratio.Results from structural parameters and surface morphology of sorbents reveal that iron metal oxide loaded on the surface of activated carbon has the selective catalytic oxidation activity of hydrogen sulfide to element sulfur.Alkali metal oxide,which changes basic surface groups,has a synergistic effect on the catalytic oxidation of hydrogen sulfide.However,the catalytic activity decreases due to excessive metal oxides loadings that may block the accessibility of micropores and reduce the surface area.
IMPLEMENTATION OF AN EFFICIENT COMPRESSION STORAGE SYSTEM FOR SCREEN GRAPHICS-LETTER
一种屏幕图文高效压缩存储系统的实现

Fang Bin,<br>
电子与信息学报 , 1995,
Abstract: This paper disscusses the principle and design of the implementation of a compression storage system for screen graphics-letter. The new system overcomes the shortage of screen storage, and possesses a large compression ratio and a high operating speed.
Spectral Phase Optical CDMA Coding Based on Step Chirped Fiber Bragg Gratings
基于步进啁啾光纤光栅的OCDMA频阈相位编码

(,<br>陈金华,,
光子学报 , 2004,
Abstract: A new method for realizing spectral phase optical CDMA coding based on step chirped fiber Bragg Gratings (SCFBGs) is proposed. In this method, a mapping code is introduced and designed phase shift is inserted to the corresponding subgrating of SCFBG according to the mapping code. The structure of encoder/decoder is simple and good correlation property can be readily obtained as demonstrated by numerical simulation results.
基于伪随机码的相位调制与脉位调制复合引信
刘已,,
兵工学报 , 2004,
Abstract: ?首先给出了伪随机相位调制与脉冲调制(PPM)信号及PPM伪随机码的产生方法,在此基础上介绍了一种新的复合引信——基于伪随机码的相位调制与脉位调制复合引信,详细阐述了其实现原理,推导了各个阶段的信号形式。最后通过分析复合引信的特性,证明复合引信具有优越的综合性能,尤其是极强的抗干扰能力。
产城融合概念定位与效应评价――以扬中市为例
杨 , ,瞿 颖,崔继昌
南京师范大学学报(自然科学版) , 2016, DOI: 10.3969/j.issn.1001-4616.2016.02.021
Abstract: 通过探讨产城融合概念定位与拓展方向,建立以人为本的产城融合发展框架,选择融合效应的评价指标,并以扬中市为例,对比分析各项指标的效果,探讨产城融合中土地利用方式选择. 结果显示:扬中市及其各乡镇经济增长、不同产业价值增长、从业人员数量增长均表现出较强的稳定性,与城乡发展一体化进程相匹配,指标测算结果表明,一产衍生三产的潜能,较二产吸纳从业人员能力更强. 通过实证分析,得出研究结论:[①]产城融合中的“产”应涵盖一产、“城”应包含乡镇,城乡发展一体化是产城融合的最终体现. [②]经济价值、从业人员数量、产业增加值的稳定性均可作为衡量产城融合效应的指标. [③]优先发展农业基础好的区域,强化一产带动三产,是农区产城融合的重要路径.
The purpose of this paper is to position and extend the conception of city-industry integration,and to build the development framework of human-based city-industry integration,as well as choose the index system to evaluate the integration effect and investigate the land use mode choice in city-industry integration. The results showed that in Yangzhong and each town,the economic growth,the growth of different industries and the growth of the number of people employed all expressed strong stability,which matched the integrated development of urban and rural. The index calculation results indicated that utilizing the potential of primary industry can create more derivative third industries,and result in lager capacity to absorb employees than second industry. This paper concluded that primary industry and towns should be involved in the city-industry integration. Integrated development of urban and rural is the final embodiment of city-industry integration. Stability of the growth of the economic value,the number of people employed and the per capita GDP can be adopted in the evaluating index system.It is an important way for the rural city-industry integration to give priority to develop those agriculture developed regions,and strengthen the primary industry-driven third industry path
MULTICHANNEL QRD-BASED ADAPTIVE LATTICE ALGORITHMS FOR THE PARAMETER IDENTIFICATION PROBLEM
适于参数识别的多信道QRD自适应格型算法

Ouyang Shan,Fang Huijun,<br>欧阳缮,
电子与信息学报 , 1996,
Abstract: A pair of multichannel recursive least squares (RLS) adaptive lattice algorithms based on the order recursive properties of lattice filters and the superior numerical properties of the Givens algorithms is derived. The derivation of the first algorithm is based on the QR decomposition of the input data matrix directly, and Givens rotations approach is used to compute the QR decomposition. Using first a prerotation of the input data matrix and then a repetition of the single channel Givens lattice algorithm, the second algorithm can be obtained. Both algorithms have superior numerical properties, particularly the robustness to wordlength limitations. The parameter vector to be estimated can be extracted directly from internal variables in the present algorithms without a backsolve operation with an extra triangular array. The results of computer simulation of the parameter identification of a two-channel system are presented to confirm efficientlly the derivation.
输送床反应器热煤气脱硫工艺研究
,赵建涛,房倚天,董立波,黄戒介
煤炭科学技术 , 2015,
Abstract: 为获得影响Fe/AC(活性炭担载金属氧化物)脱硫剂热煤气脱硫效率的工艺条件,对M/AC脱硫剂在输送床反应器上进行了热煤气脱硫试验。研究表明,输送床反应器脱硫可实现连续稳定运行。完成了模拟气氛下热态脱硫试验,模拟气氛为N2+H2S,试验压力0.1~1.0MPa。输送床反应器脱硫温度160~180℃,再生反应器温度400~450℃。完成了真实煤气气氛的热煤气脱硫试验研究,试验压力0.5~2.0MPa,最大处理煤气量120Nm3/h,最长运行时间约9h(1.5MPa,100Nm3/h)。结果表明,输送床反应器脱硫后,硫化氢含量可低于10mg/Nm3,COS含量低于30mg/Nm3,硫化氢脱除率大于99%,羰基硫脱除率可达90%。
HLA-G抑制NK和T细胞介导的对猪内皮细胞的细胞毒作用
,,黄秀英,
科学通报 , 2002,
Abstract: 为了探索HLA-G分子在异种器官移植中的应用前景,用RT-PCR方法从人胎盘组织中克隆了HLA-GcDNA,构建了哺乳动物表达载体;通过稳定转染,获得了高效表达HLA-G蛋白的猪血管内皮细胞(PECs)克隆.经细胞毒实验发现,HLA-G不仅可以抑制活化人NK-92细胞对PECs的杀伤,其抑制水平达到或低于NK-92杀伤人脐静脉内皮细胞水平;而且可以抑制异种抗原特异T淋巴细胞的细胞毒作用,抑制率为59.1%~88.9%.因此认为HLA-G作为异种移植诱导免疫耐受的新策略,不仅在延迟性排斥阶段起到抑制NK细胞作用,而且在细胞性排斥阶段同样可以抑制T淋巴细胞作用.
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