440 research outputs found
A thermal emitter with selective wavelength: Based on the coupling between photonic crystals and surface plasmon polaritons
No full textAn fficient Hierarchical Localization for Indoor Mobile Robot with Wireless Sensor and Pre-Constructed Map
No full textProton Exchange Membrane Fuel Cell System Identification and Control: Part II: H-infinity based Robust Control
No full textSixteen Conjoined Divination Inscriptions of the Huang Group
No full text甲骨卜辭綴合促使辭例訊息本身的完整性，亦得以逐漸拼湊出甲骨原樣。本文以卜辭黃組為例，搜羅近來綴合成果共十六則；關於卜辭黃組時代，大抵在帝乙、帝辛時期，此時亦以龜腹甲、胛骨為主要占卜之物，本文十六則綴合中，二例屬龜腹甲，其餘十四例則為胛骨之綴合。且其中五組是在前人的基礎上進行加綴，另外十一組則為本人所新綴，過程中並懷疑前人的一則誤綴，文內將此誤綴的兩版，再重新與其他二版進行綴合。Conjunction of divination inscriptions on oracle bones not only contributes to the completeness of inscription decipherment but also helps to restore oracle bones to their original appearances. The inscriptions of the Huang Group approximately date from the reign of Di Yi and Di Xin [Emperors Yi and Xin], when tortoise plastrons and animals’ scapulae are the main divination tools. This article collects sixteen recently conjoined divination inscriptions of the Huang Group; two of them are incised on tortoise plastrons and the other fourteen on animals’ scapulae. Five of them are the author’s additions to previous scholarly works, while the other eleven are newly conjoined by the author. During the process of conjoining, the author discovers that two divination inscriptions have mistakenly been pieced together by previous scholars and therefore re-conjoins them with other two inscriptions
Fifteen Oracle Bone Inscriptions on Conjoined Scapulae
No full text今所見商代甲骨卜辭，基本以刻在龜甲、胛骨為主。本文以胛骨為範圍，共綴合十五則，其中四則屬第一期的賓組卜辭；另十一則歸於第五期的黃組卜辭，內容涉及卜旬，以及田獵的材料。而十五組中，二組則是在前人的基礎上再行加綴，其餘則為本文新綴。This article interprets fifteen divination writings incised in conjoined animals’ scapulae, two of which are pieced together by former scholars and the other thirteen by the author. Four of the writings belong to the Bin Group of the First Phase, which covers the reign of King Wu Ding; the other eleven belong to the Huang Group of the Fifth Phase, which covers the reign of Emperors Yi and Xin. These divination inscriptions predict the results of hunting activities and the activities’ influences on the balance of nature within the following ten days. Animals’ scapulae and tortoise plastrons are the two primary materials of the Shang Dynasty oracle bones unearthed so far
Biodegradable poly(butylene succinate) and its copolyesters with minor amounts of propylene succinate/montmorillonite nanocomposites
No full textIn this study, biodegradable nanocomposites were prepared. In order to improve the compatibility between polymer and montmorillonite (MMT), the surface of MMT was organo-modified by disodium cocoamphdipropionate (K2). Then, poly(butylene succinate) (PBSu) and its copolyesters with minor amount of propylene succinate (PBPSu90/10, PBPSu80/20) were blended with 1, 3, or 5 wt% of MMT-K2, respectively, by the melt intercalation. The physical properties of these biodegradable nanocomposites were characterized before studying their crystallization and melting behaviors. The Fourier Transform Infrared spectrum and wide-angle X-ray diffraction (WAXD) pattern show that MMT was successfully modified with K2, and the interlayer distance of MMT was increased from 1.62 to 3.94 nm. The WAXD patterns of nanocomposites yield that the interlayer distance of MMT-K2 was higher than 5.94 nm. The micrographs of transmission electron microscope indicate that these nanocomposites were intercalated, not exfoliated. The results of thermogravimetric analysis revealed that the thermal stability of the resultant nanocomposites was reduced after the addition of MMT-K2. Dynamic mechanical properties of the fabricated 3wt% or 5 wt% nanocomposites of these aliphatic copolyesters showed significant enhancements in the storage modulus compared with the neat matrix, even higher than that of PBSu.
The effect of MMT-K2 on the isothermal crystallization behavior of PBSu, PBPSu90/10, and PBPSu80/20 was investigated using a differential scanning calori- meter (DSC) and polarized light microscopy (PLM). The Avrami equation successfully describes the isothermal crystallization kinetics of these nanocomposites and the value of Avrami exponent was between 2.42 and 3.35. The crystallization rate of neat BP80 was faster than BP80/MMT nanocomposites. This may be ascribed to the incompatibility of BP80 with MMT. On the contrast, the crystallization rate of BP90 or B100 nanocomposites was enhanced as the amount of MMT-K2 increased. The molecular weight of neat polymer before and after the melt intercalation indicated that the reduced molecular weight resulted in the increase of the growth rate of spherulites. Besides, it was found that the incorporation of MMT-K2 has little effect on the crystalline structure as well as the melting behavior of B100, BP90, or BP80
Malus baccata var. gracilis T. C. Ku
No full text1b. Malus baccata var. gracilis (Rehder) T.C.Ku Figs 7–8 Flora of China 9: 181 (Ku & Spongberg 2003). Malus baccata f. gracilis Rehder, Journal of the Arnold Arboretum 2 (1): 49 (Rehder 1920). – Type : CHINA • Shaanxi, Yenan Fu; 14 May 1919; fl; Purdom 327; type: A [A00026586]! Examined specimens CHINA – Gansu • Heshui; 21 Jul. 1954; fr; Yellow River Investigation Team 163; PE [PE00927499] • Pingliang; 8Aug. 1956; fr; Yellow River Investigation Team 2051; PE [PE00927502] • Yen Kwan; s.d.; fr; Fenzel & Pai 2826; PE. – Qinghai • Xining; 8 May 1990; fl; Z.H. Zhang et al. 5559; HNWP [HNWP160546]. – Shaanxi • Ganquan Laoshan; 10 May 1953; fl; Y.W. Cui 10001; PE [PE00927495] • ibid.; 23 May 1953; fl; Y.W. Cui 10077; PE • Meixian; 15 Oct. 1953; fr; Y.W. Cui 10937; PE. Description Small tree, 4‒6 m high; branches terete, pendulous. Pedicel ca 3 cm long. Petals ca 1.0 × 0.6 cm, white, obovate. Styles 3 or 4. Pome ca 0.7 × 0.8 cm. Distribution China (Gansu, Qinghai, Shaanxi) (Fig. 7). Chromosome number 2n = 34.Published as part of Liu, Jian-quan & Gao, Xin-fen, 2022, A revision of the genus Malus Mill. (Rosaceae), pp. 1-127 in European Journal of Taxonomy 853 on pages 18-19, DOI: 10.5852/ejt.2022.853.2019, http://zenodo.org/record/750137
A CeO <sub>2</sub> (100) surface reconstruction unveiled by in situ STEM and particle swarm optimization techniques
No full textThe reconstruction of the polar CeO
(100) surface has been a subject of long-standing debates due to its complexity and the limited availability of experimental data. Herein, we successfully reveal a CeO
(100)–(4 × 6) surface reconstruction by combining in situ spherical aberration–corrected scanning transmission electron microscopy, density functional theory calculations, and a particle swarm optimization–based algorithm for structure searching. We have further elucidated the stabilizing mechanism of the reconstructed structure, which involves the splitting of the filled Ce(4f) states and the mixing of the lower-lying ones with the O(2p) orbitals, as evidenced by the projected density of states. We also reveal that the surface chemisorption properties toward water molecules, an important step in numerous heterogeneous catalytic reactions, are enhanced. These insights into the distinct properties of ceria surface pave the way for performance improvements of ceria in a wide range of applications..W. acknowledges the financial support of the national natural Science Foundationof china (51971202, 52025011, and 92045301), the Key Research and development Programof Zhejiang Province (2021c01003), the Zhejiang Provincial natural Science Foundation ofchina (ld19B030001), the Shanxi- Zheda institute of Advanced Materials and chemicalengineering, and the Fundamental Research Funds for the central Universities. W.Y.acknowledges the financial support of the national natural Science Foundation of china(52171019), the Zhejiang Provincial natural Science Foundation of china (lR23B030004), andthe national Key Research and development Program (2022YFA1505500). Z.-K.h.acknowledges the financial support of the national nature Science Foundation of china(22302173). M.v.G.-P. thanks the support of the Grant Pid2021-128915nB- i00 funded by Mcin/Aei/10.13039/501100011033 and by “eRdF A way of making europe.” Author contributions:conceptualization: S.l., Z.-K.h., W.Y.., h.Y., M.v.G.-P., and Y.W. Methodology: K.Z., G.l., S.l.,Z.- K.h., W.Y., and Y.W. investigation: K.Z., G.l., c.Z., S.c., and h.Y. visualization: K.Z., G.l., Z.-K.h.,Y.J., h.Y., and Y.W. Supervision: S.l., Z.-K.h., W.Y., h.Y., M.v.G.-P., and Y.W. Writing—original draft:K.Z. and Y.W. Writing—review and editing: K.Z., G.l., S.d.l., Z.- K.h., Y.J., W.Y., h.Y., M.v.G.- P., andY.W. Funding acquisition: Z.-K.h., W.Y., and Y.W. data curation: W.Y. validation: G.l., S.l., W.Y.,h.Y., and Y.W. Project administration: Z.-K.h., W.Y., and Y.W. Formal analysis: K.Z., G.l., S.l.,Z.- K.h., h.Y. Resources: S.l. and Y.W. Software: S.l
Border design
No full textThe 3145km long US-Mexican border is one of the longest and most intense borderlines in the world. The border twin cities, El Paso and Juarez, are unlike any of the US or Mexican cities. The two cities grow interdependently, asymmetrically and share lots of contrast. Particularly, crossing the border to shop is common in the region. Both countries have very rich market culture and the border communities could benefit a bigger market in terms of variety, quality and prices. Because of their contrast, cross-border activities could be daily and intense. However, the ports of entries are limited and they are the bottlenecks where influx of people flow getting congested. In average, people spent 1 to 2 hour every day to queue before entering the border checkpoints. Every year, every border crossers spent in total 480 hours waiting in line at the border checkpoints. This creates huge losses on time and money that the border crossers could have spent alternatively for enriching their lives. Therefore, the project proposes to broaden the neutral zone for a hybrid building that allows border crossers to double use their time, enjoying life on the “LINE”. A third program-a co-operative US-Mexican market would be introduced. It would provide a shared public space where commercial, social and cultural exchanges take place. In the end, the entire building design aims to create an integrated alternative experience of crossing the border.Architecture and The Built Environmentarchitectur
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