期刊文献+
共找到15篇文章
< 1 >
每页显示 20 50 100
文化与社会的“和”元素交融
1
作者 刘林霜 《经济研究导刊》 2009年第21期195-197,共3页
"和"是东方管理的内在要求和本质特征,是管理十五要素之一。中国传统文化包含着丰富的融合、和谐、和睦、平和等思想观念,儒家、道家等曾作过深刻阐述。"和"文化在近现代得到进一步发展和深化。构建社会主义和谐社... "和"是东方管理的内在要求和本质特征,是管理十五要素之一。中国传统文化包含着丰富的融合、和谐、和睦、平和等思想观念,儒家、道家等曾作过深刻阐述。"和"文化在近现代得到进一步发展和深化。构建社会主义和谐社会,以崭新的视角来疏理、审视和借鉴中华"和"文化元素,无疑具有重要的理论和现实意义。 展开更多
关键词 “和”元素 东方管理 和谐社会
下载PDF
Non-iterative image feature matching algorithm based on reference point correspondences 被引量:1
2
作者 张维中 张丽艳 +2 位作者 王小平 丁志安 周玲 《Journal of Southeast University(English Edition)》 EI CAS 2007年第2期190-195,共6页
Based on the coded and non-coded targets, the targets are extracted from the images according to their size, shape and intensity etc., and thus an improved method to identify the unique identity(D) of every coded ta... Based on the coded and non-coded targets, the targets are extracted from the images according to their size, shape and intensity etc., and thus an improved method to identify the unique identity(D) of every coded target is put forward and the non-coded and coded targets are classified. Moreover, the gray scale centroid algorithm is applied to obtain the subpixel location of both uncoded and coded targets. The initial matching of the uncoded target correspondences between an image pair is established according to similarity and compatibility, which are based on the ID correspondences of the coded targets. The outliers in the initial matching of the uncoded target are eliminated according to three rules to finally obtain the uncoded target correspondences. Practical examples show that the algorithm is rapid, robust and is of high precision and matching ratio. 展开更多
关键词 reference points detection coded and non-coded target SUBPIXEL gray scale centroid point correspondence
下载PDF
Platinum-group element geochemistry of mafic rocks from the Dongchuan area,southwestern China 被引量:2
3
作者 Siqi Yang Hong Zhong +2 位作者 Weiguang Zhu Wenjun Hu Zhongjie Bai 《Acta Geochimica》 EI CAS CSCD 2017年第1期52-65,共14页
Mafic intrusions and dykes are well preserved in the Yinmin and Lanniping districts, located within the western margin of the Yangtze Block, SW China. Although these mafic rocks from the two areas formed during differ... Mafic intrusions and dykes are well preserved in the Yinmin and Lanniping districts, located within the western margin of the Yangtze Block, SW China. Although these mafic rocks from the two areas formed during different periods, they share similar ranges of PGE concentration. Most of the Yinmin gabbroic dykes contain relatively high PGE concentrations (PGEs=13.9-87.0 ppb) and low S contents (0.003 %-0.020 %), higher than the maximum PGE concentrations of mafic magmas melting from the mantle. Two exceptional Yinmin samples are characterized by relatively low PGE (PGEs = 0.31-0.37 ppb)and high S (0.114 %-0.257 %) contents. In contrast, most samples from the Lanniping gabbroic intrusion have low PGE con- centrations (PGEs = 0.12-1.02 ppb) and high S contents (0.130 %-0.360 %), except that the three samples exhibit relatively high PGE (PGEs=16.3-34.8 ppb) and low S concentrations (0.014 %-0.070 %). All the Yinmin and Lanniping samples are characterized by the enrichment of PPGE relative to IPGE in the primitive-mantle normalized diagrams, and the high-PGE samples exhibit obvious Ru anomalies. This study suggests that during the ascent of the parental magma, removal of Os-Ir-Ru alloys and/or chro- mite/spinel leads to high Pd/Ir ratios and Ru anomalies for the Yinmin high-PGE samples and relatively lower Pd/lr ratios and Ru anomalies for the Lanniping low-PGE samples. We propose that the magmas parental to the Yinmin gabbroic dykes are initially S-unsaturated, and subsequently, minor evolved magma reached sulfur saturation and led to sulfide segregation. Although the Lanniping parental magmas are originally not saturated in S, the high Cu/Pd ratios (3.8× 10^4 to 3.2 × 10^6) for most of the Lanniping samples indicate the S-saturated state and sulfide segregation. A calculation shows that the PGE-poor magmas might have experienced 0.01%-0.1%sulfidesegregationinthemagma chamber. Therefore, our study provides a possible opportunity to discover PGE-enriched sulfide mineralization some- where near or within the Lanniping mafic intrusion. 展开更多
关键词 Mafic intrusions and dykes PLATINUM groupelement Sulfide saturation Dongchuan area
下载PDF
Elemental characteristics of lacustrine oil shale and its controlling factors of palaeo-sedimentary environment on oil yield: a case from Chang 7 oil layer of Triassic Yanchang Formation in southern Ordos Basin 被引量:1
4
作者 Delu Li Rongxi Li +1 位作者 Zengwu Zhu Feng Xu 《Acta Geochimica》 EI CAS CSCD 2018年第2期228-243,共16页
As an important unconventional resource, oil shale has received widespread attention. The oil shale of the Chang 7 oil layer from Triassic Yanchang Formation in Ordos Basin represents the typical lacustrine oil shale ... As an important unconventional resource, oil shale has received widespread attention. The oil shale of the Chang 7 oil layer from Triassic Yanchang Formation in Ordos Basin represents the typical lacustrine oil shale in China. Based on analyzing trace elements and oil yield from boreholes samples, characteristics and paleo-sedi- mentary environments of oil shale and relationship between paleo-sedimentary environment and oil yield were studied. With favorable quality, oil yield of oil shale varies from 1.4% to 9.1%. Geochemical data indicate that the paleo-redox condition of oil shale's reducing condition from analyses of V/Cr, V/(V + Ni), U/Th, δU, and authi genic uranium. Equivalent Boron, Sp, and Sr/Ba illustrate that paleosalinity of oil shale is dominated by fresh water. The paleoclimate of oil shale is warm and humid by calculating the chemical index of alteration and Sr/Cu. Fe/Ti and (Fe + Mn)/Ti all explain that there were hot water activities during the sedimentary period of oil shale. In terms of Zr/Rb, paleohydrodynamics of oil shale is weak. By means of Co abundance and U/Th, paleo-water-depth of oil shale is from 17.30 to 157.26 m, reflecting sedimentary environment which is mainly in semi deep-deep lake facies. Correlation analyses between oil yield and six paleoenvironmental factors show that the oil yield of oil shale is mainly controlled by paleo-redox conditions, paleoclimate, hot water activities, and depth of water.Paleosalinity and paleohydrodynamics have an inconspicuous influence on oil yield. 展开更多
关键词 Elemental geochemistry Palaeosedimentary Main controlling factors Lacustrine oil shale Triassic Ordos Basin
下载PDF
Ore-forming elements diffusion and distribution in the altered host rock surrounding the Koktokay No.3 pegmatite in the Chinese Altay 被引量:4
5
作者 Jingyu Zhao Hui Zhang +2 位作者 Yong Tang Zhenghang Lü Yang Chen 《Acta Geochimica》 EI CAS CSCD 2017年第2期151-165,共15页
Petrography and geochemistry of the altered and unaltered host rocks surrounding the Koktokay No.3 pegmatite revealed that the unaltered amphibolite is mainly composed of hornblende, plagioclase, and ilmenite.Beyond t... Petrography and geochemistry of the altered and unaltered host rocks surrounding the Koktokay No.3 pegmatite revealed that the unaltered amphibolite is mainly composed of hornblende, plagioclase, and ilmenite.Beyond these primary components, the altered host rocks contain a few newly formed minerals, including biotite,tourmaline, chlorine, and muscovite. The alteration zone surrounding the Koktokay No.3 pegmatite is limited to 2.0 m, characterized by biotitization, tourmalization, and chloritization. In the altered host rocks, the contents of SiO2, MgO, MnO, Na2O, and TiO2 did not vary greatly.However, Al2O3 showed a weak decreasing trend with the increasing distance from the pegmatite contact zone, while Fe2O3 and CaO showed an increasing trend. The contents of Li, Rb, and Cs in the altered host rocks were much higher than those in the unaltered host rocks, decreasing with distance from the contact. The chondrite-normalized rare earth element(REE) pattern of the altered and unaltered host rock was right-inclined from La to Lu, but enriched in light REEs over heavy REEs after hydrothermal alteration. An isocon plot shows that some oxides migrated in with an order of P2O5〉K2O 〉TiO2〉Al2O3〉SiO2〉MnO≥MgO, while others migrated out with an order of Na2O 〉CaO 〉Fe2O3. For REEs, the migration ratios are positive values withCs 〉Rb 〉Li 〉Nb 〉Ta 〉Be, signifying that all REEs migrated from the exsolved magmatic fluid into the altered host rocks. It was concluded that diffusion was the only mechanism for migration of ore-forming elements in the alteration zone. The effective diffusion coefficients(Deff)of LiF, RbF, and CsF were estimated under a fluid temperature of 500–550℃. Using a function of concentration(C(x,t)) and distance(x), the order of migration distance was determined to be LiF 〉CsF 〉RbF, with diffusion times of (3.39 ± 0.35)× 10^6,(3.19 ± 0.28) × 10^5 and(6.33 ± 0.05) × 10^5 years, respectively. 展开更多
关键词 Rare elements DIFFUSION ALTERATION Koktokay No. 3 pegmatite ALTAY
下载PDF
Change in Sediment Provenance Near the Current Estuary of Yellow River Since the Holocene Transgression 被引量:3
6
作者 SONG Sheng FENG Xiuli +3 位作者 LI Guogang LIU Xiao XIAO Xiao FENG Li 《Journal of Ocean University of China》 SCIE CAS CSCD 2018年第3期535-544,共10页
Sedimentary sequence and sediment provenance are important factors when it comes to the studies on marine sedimentation. This paper studies grain size distribution, lithological characteristics, major and rare earth e... Sedimentary sequence and sediment provenance are important factors when it comes to the studies on marine sedimentation. This paper studies grain size distribution, lithological characteristics, major and rare earth elemental compositions, micropaleontological features and ^(14)C ages in order to examine sedimentary sequence and sediment provenance of the core BH6 drilled at the mouth of the Yellow River in Bohai Sea. According to the grain size and the micropaleontological compositions, 4 sedimentary units have been identified. Unit 1(0–8.08 mbsf) is of the delta sedimentary facies, Unit 2(8.08–12.08 mbsf) is of the neritic shelf facies, Unit 3(12.08–23.85 mbsf) is of near-estuary beach-tidal facies, and Unit 4(23.85 mbsf–) is of the continental lake facies. The deposits from Unit 1 to Unit 3 have been found to be marine strata formed after the Holocene transgression at about 10 ka BP, while Unit 4 is continental lacustrine deposit formed before 10 ka BP. The provenances of core BH6 sediments show properties of the continental crust and vary in different sedimentary periods. For Unit 4 sediments, the source regions are dispersed while the main provenance is not clear, although the parent rock characteristics of a few samples are similar to the Luanhe River sediments. For Unit 3, sediments at 21.1–23.85 mbsf have been mainly transported from the Liaohe River, while sediments above 21.1 mbsf are mainly from the Yellow River and partially from the Liaohe River. For Unit 2, the sediments have been mainly transported from the Yellow River, with a small amount from other rivers. For Unit 1, the provenance is mainly the Yellow River catchment. These results help in better understanding the evolution of the Yellow River Delta. 展开更多
关键词 Yellow River Estuary Holocene transgression rare earth element PROVENANCE
下载PDF
The Role of Saturated Hydrocarbon in Enrichment of Cu, Pb, Zn in Kupferschiefer, Southwestern Poland
7
作者 金玉洁 金瞰昆 +1 位作者 王俊茹 孙玉壮 《Journal of China University of Mining and Technology》 2001年第1期29-32,共4页
In order to clarify the role of organic matter in the enrichment of base metal, 10 samples of the Permian Kupferschiefer from southwestern Poland were analyzed by using microscopic and geochemical methods. The results... In order to clarify the role of organic matter in the enrichment of base metal, 10 samples of the Permian Kupferschiefer from southwestern Poland were analyzed by using microscopic and geochemical methods. The results indicate that the solvent extracts have been depleted in the samples with high Cu, Pb, Zn contents. This depletion occurred preferably in saturated hydrocarbons. Saturated hydrocarbons served as hydrogen donor for thermochemical sulfate reduction (TSR). The GC traces of saturated hydrocarbon show that the depletion occurred mainly in long chain n alkanes. 展开更多
关键词 saturated hydrocarbon organic matter metal enrichment KUPFERSCHIEFER thermochemical sulfate reduction
下载PDF
Comparative study of the nutritional composition and toxic elements of farmed and wild Chanodichthys mongolicus 被引量:3
8
作者 姜海峰 程小飞 +3 位作者 耿龙武 汤施展 佟广香 徐伟 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2017年第4期737-744,共8页
Information of the difference in quality between farmed and wild fish is central to better ensuring fish products produced in aquaculture meet regulatory and consumer requirements. Proximate composition, amino acid an... Information of the difference in quality between farmed and wild fish is central to better ensuring fish products produced in aquaculture meet regulatory and consumer requirements. Proximate composition, amino acid and fatty acid profiles, and toxic elements contents of fanned and wild Chanodichthys mongolicus were established and compared. Significantly higher crude protein content while lower moisture content in farmed fish compared to wild fish were observed (P〈0.05). The percentages of total amino acids (TAA), total essential amino acids (TEAA), total non-essential amino acids (TNEAA) and total delicious amino acids (TDAA) in farmed fish were all significantly higher than those in the wild equivalent (P〈0.05). Compared to the FAO/WHO recommended reference values, the ratios of TEAA/ TAA (39.84%o-40.33%) were comparable to 40% and TEAA / TNEAA (66.22%-67.60%) were above 60%. Fatty acid profiles in both farmed and wild C. mongolicus were dominated by monounsaturated fatty acid (MUFA), with farmed fish contained much more MUFA content compared to wild counterpart (P〈0.05). Notably, wild fish exhibited significantly higher levels of total polyunsaturated fatty acid (PUFA) including eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) than fanned fish (P〈0.05). The EPA (C20:503) and linoleic acid (C18:206) were the predominant PUFA in wild and farmed C. mongolicus, respectively. Moreover, farmed fish displayed an overall lower toxic element levels (As, Cd, Pb and Hg) in comparison with wild fish, and both were far lower than the established limit standard. In conclusion, our results suggest that the nutritional quality of fanned C. mongolicus was inferior to their wild counterpart with respect to fatty acids nutrition, and therefore further studies should focus on the improving C. mongolicus diet in order to enhance the overall nutritional composition. 展开更多
关键词 Chanodichthys mongolicus farmed versus wild nutrition value quality safety
下载PDF
Error Estimates of H^1-Galerkin Mixed Methods for the Viscoelasticity Wave Equation 被引量:1
9
作者 WANG Jin-feng~,LIU Yang~,LI Hong~(1. LIU Yang LI Hong 《Chinese Quarterly Journal of Mathematics》 CSCD 2011年第1期131-137,共7页
H1-Galerkin mixed methods are proposed for viscoelasticity wave equation.Depending on the physical quantities of interest,two methods are discussed.The optimal error estimates and the proof of the existence and unique... H1-Galerkin mixed methods are proposed for viscoelasticity wave equation.Depending on the physical quantities of interest,two methods are discussed.The optimal error estimates and the proof of the existence and uniqueness of semidiscrete solutions are derived for problems in one space dimension.And the methods don't require the LBB condition. 展开更多
关键词 viscoelasticity wave equation H1-Galerkin mixed finite element methods existence and uniqueness optimal error estimates
下载PDF
Static Requirement and Type's Complexity in the Diagnostics Phase
10
《Journal of Civil Engineering and Architecture》 2012年第4期489-495,共7页
The preservation of a historical building, whatever its architectural and/or artistic value, is more successful when undertaken with a deep understanding of the building's history, development, materials and construc... The preservation of a historical building, whatever its architectural and/or artistic value, is more successful when undertaken with a deep understanding of the building's history, development, materials and construction techniques. The preliminary phase of any restoration intervention must start with data acquisition regarding the characteristics and conditions of the building, including a survey of significant alterations. In a great number of cases, restorations are not respectful of the building's static efficiency, so its static requirement is weakened. In fact, a very high percentage of instances in which a restoration effort results in building damage is attributable to such modification's indifference to the structural balance of a structure, as consolidated over time. This study focuses on the restoration intervention on two trilobate pillars that separate the central space from the presbytery in the Cathedral of Matera, located in southern Italy. Through the use of sonic tests - carried out despite the complexity of the shape of the building and constructive elements that characterize these pillars -- it was possible to show the effectiveness of the implemented intervention, highlighting critical points and weaknesses. The research aims to show how -- despite the complexity of some structural elements of a building -- in-depth knowledge of a structure's structure and history is essential to for the success of restoration interventions, which are respectful of a building's type and material peculiarities. 展开更多
关键词 Structural complexity static requirements refurbishment interventions diagnosis phase CONSERVATION
下载PDF
Leaf stable carbon isotope composition in Picea schrenkiana var. tianschanica in relation to leaf physiological and morphological characteristics along an altitudinal gradient
11
作者 ZHANG Hui-wen WU Zhen XIAO Hong-lang 《Journal of Mountain Science》 SCIE CSCD 2016年第7期1217-1228,共12页
To understand the effects of leaf physiological and morphological characteristics on δ13C of alpine trees, we examined leaf δ13C value, LA, SD, LNC, LPC, LKC, Chla+b, LDMC, LMA and Narea in one-year-old needles of P... To understand the effects of leaf physiological and morphological characteristics on δ13C of alpine trees, we examined leaf δ13C value, LA, SD, LNC, LPC, LKC, Chla+b, LDMC, LMA and Narea in one-year-old needles of Picea schrenkiana var. tianschanica at ten points along an altitudinal gradient from 1420 m to 2300 m a.s.l. on the northern slopes of the Tianshan Mountains in northwest China. Our results indicated that all the leaf traits differed significantly among sampling sites along the altitudinal gradient(P<0.001). LA, SD, LPC, LKC increased linearly with increasing elevation, whereas leaf δ13C, LNC, Chla+b, LDMC, LMA and Narea varied non-linearly with changes in altitude. Stepwise multiple regression analyses showed that four controlled physiological and morphological characteristics influenced the variation of δ13C. Among these four controlled factors, LKC was the most profound physiological factor that affected δ13C values, LA was the secondary morphological factor, SD was the third morphological factor, LNC was the last physiological factor. This suggested that leaf δ13C was directly controlled by physiological and morphological adjustments with changing environmental conditions due to the elevation. 展开更多
关键词 Alpine trees Leaf Carbon isotope composition Physiological characteristics Morphological characteristics Altitudinal variation
下载PDF
Distribution of Elements in Primitive Sequences over Z_(p^e)
12
作者 范淑琴 韩文报 《Journal of Mathematical Research and Exposition》 CSCD 北大核心 2004年第2期219-224,共6页
Using the estimates of character sums over Galoi8 rings and the trace de-scription of primitive sequences over Z_(p^e), we obtain an estimate for the frequency of theoccurrences of any element in Z_(p^e) in one period... Using the estimates of character sums over Galoi8 rings and the trace de-scription of primitive sequences over Z_(p^e), we obtain an estimate for the frequency of theoccurrences of any element in Z_(p^e) in one period of a primitive sequence, which is betterthan Kuzmin's results if n >4e, where n is the degree of the generating polynomial ofthe primitive sequence. 展开更多
关键词 primitive sequence over ring element distribution character sum
下载PDF
On the Existence for Some Special Primitive Elements in Finite Fields 被引量:2
13
作者 Qunying LIAO Jiyou LI Keli PU 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2016年第2期259-266,共8页
Let F_q be a finite field of characteristic p. In this paper, by using the index sum method the authors obtain a sufficient condition for the existence of a primitive elementα∈ F_(q^n) such that α + α^(-1)is also ... Let F_q be a finite field of characteristic p. In this paper, by using the index sum method the authors obtain a sufficient condition for the existence of a primitive elementα∈ F_(q^n) such that α + α^(-1)is also primitive or α + α^(-1)is primitive and α is a normal element of F_(q^n) over F_q. 展开更多
关键词 Finite field Primitive element Normal basis
原文传递
Non-zero quantum discord at finite temperature 被引量:2
14
作者 YU XiangYang LI JianHong LI XiaoBin 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2012年第5期815-821,共7页
We investigate theoretically the quantum discord dynamics of a two-qubit composite system subject to a common finite-temperature reservoir by solving the Born-Markovian master equation analytically.The ultimate quantu... We investigate theoretically the quantum discord dynamics of a two-qubit composite system subject to a common finite-temperature reservoir by solving the Born-Markovian master equation analytically.The ultimate quantum discord,however,exhibits a relatively high stable value associated with the reservoir temperature despite the permanent disappearance of entanglement simultaneously.Further analysis shows that the unique characteristic depends strongly on the off-diagonal non-zero elements of the density matrix.Our result manifests the greater robustness of quantum discord compared with entanglement,which may be helpful in quantum-information technologies. 展开更多
关键词 quantum discord TWO-QUBIT finite-temperature reservoir
原文传递
Geochemical characteristics and geological significance of Cretaceous phonotephrite from the Mid-Pacific Mountains 被引量:1
15
作者 Shuangshuang CHEN Jiaqi LIU 《Science China Earth Sciences》 SCIE EI CAS CSCD 2018年第6期745-764,共20页
Systematic analyses were conducted including the petrographic features, major and trace elements, Sr and Nd isotopic compositions, and mineral structure and compositions of whole rocks. Mid-Pacific Mountain volcanic r... Systematic analyses were conducted including the petrographic features, major and trace elements, Sr and Nd isotopic compositions, and mineral structure and compositions of whole rocks. Mid-Pacific Mountain volcanic rocks are mainly phonotephrite with a porphyritic texture. Phenocrysts are mainly composed of Ca-rich plagioclase, clinopyroxene and nepheline.These volcanic rocks are significantly rich in large-ion lithophile and light rare earth elements, without obvious Eu anomalies(δEu=0.99–1.03), and with relatively enriched^(87) Sr/^(86) Sr(0.703829–0.704313) and^(143) Nd/^(144) Nd isotopic ratios(0.512857–0.512871), suggesting that they have similar but more enriched features than the OIB magmatic source. These volcanic rocks may originate from relatively deep magma source with the existence of spinel-garnet Iherzolites, and have undergone partial melting at a low degree of 1–3%. In addition, The residual Nb-Ta minerals(such as sphene, rutile, perovskite) may remain in the mantle source, and the magma components have undergone metasomatism by carbonate melt/fluid or alkali-rich fluid, causing high contents of incompatible elements and significant loss of Nb, Ta and Ti in these volcanic rocks. There are many similarities between the phonotephrites in the Mid-Pacific Mountain and the volcanic rocks in the Line Islands based on the tectonic settings and the geochemical characteristics. We thus speculate that Site 313 volcanic rocks in the Mid-Pacific Mountain is most likely to be a continuation of the Line Islands. 展开更多
关键词 Phonotephrite OIB-type mantle source Carbonatite metasomatism Line Islands Mid-Pacific Mountain
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部