35,295 research outputs found
Ji Han xiang chen zhuan
No full text[V.1-2]. 前漢相臣傳 : 十二卷 -- [v.3-5]. 後漢相臣傳 : 十六卷 -- [v.6]. 季漢相臣傳 : 六卷.[V.1-2]. Qian Han xiang chen zhuan : shi er juan -- [v.3-5]. Hou Han xiang chen zhuan : shi liu juan -- [v.6]. Ji Han xiang chen zhuan : liu juan.魏顯國纂述 ; 魏一鵬編次.綫裝, 1函.框22x14.3公分, 10行20字, 白口, 單黑魚尾, 四周單邊, 版心上鐫題名, 中鐫卷次, 下鐫葉次及小題.刻書年據《四庫全書存目叢書》鈐有"元鑑齋", "潤州笪重光鑒定印", "毛氏收藏子孫永保"印.Library's copy: 本館只存《歷代相臣傳》中《前漢》, 《後漢》, 《季漢》共六冊.Xian zhuang, 1 han.Kuang 22 x 14.3 gong fen, 10 hang 20 zi, bai kou, dan hei yu wei, si zhou dan bian, ban xin shang juan ti ming, zhong juan juan ci, xia juan ye ci ji xiao ti.Ke shu nian ju "Si ku quan shu cun mu cong shu"Wei Xianguo zuan shu ; Wei Yipeng bian ci.Qian you "Yuan jian zhai", "Runzhou Da Chongguang jian ding yin", "Mao shi shou cang zi sun yong bao" yin.Library's copy: ben guan zhi cun "Li dai xiang chen zhuan" zhong "Qian Han", "Hou Han", "Ji Han" gong liu ce
Zhong xin liang zi bi te dui huan jing zhong wu li liang de tan ce
No full textChen, Dongqing = 中心量子比特對環境中物理量的探測 / 陳冬青.Thesis Ph.D. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 100-103).Abstracts also in Chinese.Title from PDF title page (viewed on 28, October, 2016).Chen, Dongqing = Zhong xin liang zi bi te dui huan jing zhong wu li liang de tan ce / Chen Dongqing
Design and fabrication of Ce-based sintered magnets by doping Nd-Fe/Ce-Fe alloys
No full textEffects of the distribution of rare-earth elements on 2: 14: 1-type Ce-based sintered magnet with same nominal composition were investigated by respectively doping Nd-Fe and Ce-Fe eutectic alloys. The coercivity and the thermal stability of the magnet doping Nd-Fe alloy revealed more excellent performance (H-i(c) = 12.19kOe, alpha = -0.1474%/degrees C, beta = -0.5129%/degrees C) than those of the magnet doping Ce-Fe alloy (H-i(c) = 10.13kOe, alpha = -0.1665%/degrees C, beta = -0.5271%/degrees C). The difference of the newly formed grain boundary phases and elemental enrichment variation of the matrix phase grain for the processed magnets were two major reasons of the coercivity discrepancy. Ce-based magnet with optimized structure was obtained and this method was promising to maximize the utilization of abundant rare-earth element Ce in 2:14:1-type magnet. (C) 2018 Elsevier B.V. All rights reserved
Design and fabrication of Ce-based sintered magnets by doping Nd-Fe/Ce-Fe alloys
No full textEffects of the distribution of rare-earth elements on 2: 14: 1-type Ce-based sintered magnet with same nominal composition were investigated by respectively doping Nd-Fe and Ce-Fe eutectic alloys. The coercivity and the thermal stability of the magnet doping Nd-Fe alloy revealed more excellent performance (H-i(c) = 12.19kOe, alpha = -0.1474%/degrees C, beta = -0.5129%/degrees C) than those of the magnet doping Ce-Fe alloy (H-i(c) = 10.13kOe, alpha = -0.1665%/degrees C, beta = -0.5271%/degrees C). The difference of the newly formed grain boundary phases and elemental enrichment variation of the matrix phase grain for the processed magnets were two major reasons of the coercivity discrepancy. Ce-based magnet with optimized structure was obtained and this method was promising to maximize the utilization of abundant rare-earth element Ce in 2:14:1-type magnet. (C) 2018 Elsevier B.V. All rights reserved
Microchip electrophoresis with hydrodynamic injection and waste-removing function for quantitative analysis
No full textTwo-tier channel estimation aided near-capacity MIMO transceivers relying on norm-based joint transmit and receive antenna selection
Full text linkWe propose a norm-based joint transmit and receive antenna selection (NBJTRAS) aided near-capacity multiple-input multiple-output (MIMO) system relying on the assistance of a novel two-tier channel estimation scheme. Specifically, a rough estimate of the full MIMO channel is first generated using a low-complexity, low-training-overhead minimum mean square error based channel estimator, which relies on reusing a modest number of radio frequency (RF) chains. NBJTRAS is then carried out based on this initial full MIMO channel estimate. The NBJTRAS aided MIMO system is capable of significantly outperforming conventional MIMO systems equipped with the same modest number of RF chains, while dispensing with the idealised simplifying assumption of having perfectly known channel state information (CSI). Moreover, the initial subset channel estimate associated with the selected subset MIMO channel matrix is then used for activating a powerful semi-blind joint channel estimation and turbo detector-decoder, in which the channel estimate is refined by a novel block-of-bits selection based soft-decision aided channel estimator (BBSB-SDACE) embedded in the iterative detection and decoding process. The joint channel estimation and turbo detection-decoding scheme operating with the aid of the proposed BBSB-SDACE channel estimator is capable of approaching the performance of the near-capacity maximumlikelihood (ML) turbo transceiver associated with perfect CSI. This is achieved without increasing the complexity of the ML turbo detection and decoding process
CE Challenges: Work to Do
No full textCE has been used for more than two decades now. Despite many successes and advantages, there are still many challenges to be addressed. These challenges are both technical and organisational. In the paper we will address the current challenges of CE. Many challenges are related to the exchange of data and knowledge and to the systems that make data and knowledge exchange possible. Although much progress has been made in enabling extensive data and knowledge exchange and use, much remains to be wished. For example, there are still barriers to data exchange. Technically, these barriers may consist of different formats, differences in infrastructures and systems, and different semantics. There are also organisational and political barriers. For example, investment in information system may heavily impact upstream suppliers, while revenues of better information exchange may predominantly be gained by downstream actors. Without sharing costs and revenues, chain-wide information exchange will not be easily realised. Another barrier is the possible lack of willingness to share information, because of potential misuse of knowledge and loss of power. The paper is organised as follows. First we will describe the current manifestation of CE as described in a recent book. Second, we will list current trends in CE. Third, we will present some Critical Success Factors (CSFs) that are considered relevant for implementing and adapting CE practices. Last, we indicate some research and practical questions to be addressed, especially for areas that have a high potential and actual impact. </p
Enhanced Temperature Stability of Coercivity in Sintered Permanent Magnet by Substitution of Ce for Didymium
No full textEffects of partial substitution of Ce for didymium (Pr-Nd alloy, abbreviated to Di) on elevated temperature magnetic properties in sintered (Di(1-x)Ce(x))(27.5)Dy3Al0.1Cu0.1Febal.B (wt.%, x = 0 similar to 0.56) magnets were investigated in this paper. Temperature stability of remanence was found to decrease in Ce substitution. However, the temperature stability of coercivity was largely improved when x >= 0.24. Temperature dependence of magnetocrystalline anisotropy field (H-A) was improved as Ce substitution. Microstructural observation and micromagnetic analysis indicated that a microstructure of magnets was modified when x >= 0.24. The enhancement of temperature stability of coercivity was due to the improvement of temperature dependence of H-A and the modification of microstructure
Coercivity enhancement of Ce-Fe-B sintered magnets by low-melting point intergranular additive
No full textCe-Fe-B sintered magnets with enhanced coercivity were prepared by the powder metallurgy method. The mechanism of the coercivity enhancement in Ce-Fe-B sintered magnets with the low-melting point intergranular additive was discussed in details. It was speculated that the low coercivity of Ce-Fe-B sintered magnet was related to the irregular sharps and relatively low magneto-anisotropy field of the matrix phase. After introducing a 20 wt.% Nd-based intergranular additive, the coercivity markedly increased from 108 Oe to 2560 Oe due to the formation of thin and continuous grain boundary layers and the surface modification of the matrix phase grains. Additionally, the formation of the high anisotropy field (Nd,Ce)(2)Fe14B shell was beneficial to the increase of the coercivity as well. This work suggested that adding low-melting point intergranular additives was effective to fabricate the practical Ce-Fe-B sintered magnets
Core-shell Y-substituted Nd-Ce-Fe-B sintered magnets with enhanced coercivity and good thermal stability
No full textAlthough Nd-Ce-Fe-B permanent magnets are inexpensive, they have degraded coercivity and poor thermal stability. To mitigate these disadvantages, in this work, we fabricated a core-shell grain structure with a Y-rich core and a (Nd, Ce)-rich shell in the Nd-15.25(Ce1-xYx)(15.25) FebalAl0.1Cu0.1B (x = 0, 0.05, 0.10, 0.15, and 0.20) system by substituting Y for Ce. Substituting Y increased the coercivity from 7.13 kOe in the Ce1.00Y0.00 (x = 0) magnet to 9.73 kOe in the Ce0.85Y0.15 (x = 0.15) magnet. The thermal stability of its magnetic performance also improved with Y substitution, with lower temperature coefficients of remanence vertical bar alpha vertical bar and coercivity vertical bar beta vertical bar. We explained these improvements in magnetic properties by examining the relationship between the microstructure and the properties of the core-shell grain structure. Published by AIP Publishing
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