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苗药方“四大血”形性特征与适应症范围 被引量:10
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作者 曾定伦 熊传榘 +5 位作者 王毅刚 成建国 吴桂华 张洪雷 谢惠 黎芸 《中国民族医药杂志》 2004年第S1期153-154,共2页
本文通过对苗药方四大血中血藤、血飞、舒筋、活血四药的外形、内质、性味、功能、主治病证的分析,指出四大血最常用品种的植物学科属,并得出结论:四大血最主要的适应症为风湿疼痛、跌打损伤、血瘀、月经不调、瘫痪;其次为肢体麻木;再... 本文通过对苗药方四大血中血藤、血飞、舒筋、活血四药的外形、内质、性味、功能、主治病证的分析,指出四大血最常用品种的植物学科属,并得出结论:四大血最主要的适应症为风湿疼痛、跌打损伤、血瘀、月经不调、瘫痪;其次为肢体麻木;再次为胃痛、血虚经少、经闭。四大血合方寒热平调,治症广泛,是苗医通气散血治疗原则的代表性方剂。 展开更多
关键词 “四大血” 形性特征 苗药
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Analysis and identification of SCAR molecular markers associated with birch fiber length trait 被引量:1
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作者 王丹 魏志刚 +1 位作者 杨传平 刘关君 《Journal of Forestry Research》 SCIE CAS CSCD 2008年第4期288-292,共5页
The fiber length trait (FLT) of 538 individuals from nature birch population in Maorshan region, Heilongjang, China were measured, of which 100 individuals were selected as representative variety of correlated fragm... The fiber length trait (FLT) of 538 individuals from nature birch population in Maorshan region, Heilongjang, China were measured, of which 100 individuals were selected as representative variety of correlated fragments screening with random amplified polymorphism DNA (RAPD) technique. In total of 20 RAPD primers were tested through multiple regression analysis between amplified strip and the character behaviors, and a correlative segment BFLR-16 was obtained. The correlation coefficient between BFLI-16 and FLT was 0.6144, with the significant level of 1%. BFLI-16 was then cloned, sequenced and transformed into SCAR marker. The percentage of identifying long fiber birches by this SCAR was more than 92. The result indicates that the SCAR markers has high specificity for the long fiber individuals and is highly linked with the gene controlling the character of fiber length, and its existence is significantly correlative with the increase in the fiber length. 展开更多
关键词 Betula platyphylla fiber length trait random amplified polymorphism DNA sequence characterized amplified region
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Morphological Characteristics Analysis of 11 Broom Sorghum Varieties 被引量:1
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作者 乌艳红 李志明 +8 位作者 辛晓平 孙德欣 吕宁 乌仁图亚 娜日娜 赵建平 王军 韩晓华 李峰 《Agricultural Science & Technology》 CAS 2009年第1期15-18,42,共5页
[Objective] To provide a theoretical basis for high-yield breeding of broom sorghum.[Method] Using 11 kinds of broom sorghum collected at home as research objects, the differences in morphological characteristics of b... [Objective] To provide a theoretical basis for high-yield breeding of broom sorghum.[Method] Using 11 kinds of broom sorghum collected at home as research objects, the differences in morphological characteristics of broom sorghum were compared through the survey of some indicators, such as plant height, tillering, inflorescence, stem node, stem-leaf ratio, yield, and so on. [Result] The 11 kinds of broom sorghum were different in morphological characteristics with large amplitude of plant height; zygl-1, zygl-6, zygl-8 and zygl-9 were appropriate for fixed broom type; zygl-9 had the highest integrated production. [Condusion] The study laid the foundation for further exploring breeding, cultivation and promotion of broom sorghum. 展开更多
关键词 Broom sorghum Morphological characteristic ANALYSIS
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关木通及一种伪关木通的鉴别
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作者 伍健玲 《中国药房》 CAS CSCD 1998年第5期240-240,共1页
关键词 关木通 鉴别 形性特征 理化鉴别
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Screening of a Novel Bioflocculant-producing Strain and Research on Its Flocculation 被引量:4
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作者 周爱华 梁生康 单宝田 《Agricultural Science & Technology》 CAS 2012年第9期1997-2000,2005,共5页
[Objective] This study aimed to screen a bacterial strain capable of producing bioflocculant. [Method] A bacterial strain T-11 capable of producing bioflocculant was isolated from activated sludge. Detailed tests on t... [Objective] This study aimed to screen a bacterial strain capable of producing bioflocculant. [Method] A bacterial strain T-11 capable of producing bioflocculant was isolated from activated sludge. Detailed tests on the morphological, physiological and biochemical characteristics were carried out and identification was performed to identify the strain. Finally, the bioflocculant was isolated and purified, and the flocculating activity and chemical characteristics were measured. [Result] It was identified as Serratia plumuthica based on its morphological, physiological and biochemical characteristics. This strain secreted flocculant best in a culture medium which included sucrose and NaNO3. The maximal cell growth was achieved within 10 h and the flocculating activity paralleled to it. It was found to be effective for flocculation of kaolin suspension, when added at a final concentration of 0.7 mg/L, over a range of pHs (2-7), and temperature (approximately 30-80 ℃). Chemical analysis indicated that the bioflocculant was an acidic polysaccharide consisting of glucose, glucuronic acid and galactose, talose and altrose. Infrared spectrum analysis also revealed typical characteristics of polysaccharides. [Conclusion] The biofloccu- lants produced by strain T-11 can greatly improve the ability of activated sludge to settle. 展开更多
关键词 BIOFLOCCULANT Flocculating activity POLYSACCHARIDE Serratia plumuthica
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Research on Pollen Grains of Tetraploid Lines and Diploid Control Line of Chrysanthemum cinerariifolium (Trev.) Vis. 被引量:1
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作者 刘蓁 高山林 《Agricultural Science & Technology》 CAS 2010年第5期151-154,共4页
[Objective] The aim was to study characters of pollen grains of tetraploid lines and diploid control line of Chrysanthemum cinerariifolium (Trev.) Vis.,morphological characters,fertility of pollen grain and germinatio... [Objective] The aim was to study characters of pollen grains of tetraploid lines and diploid control line of Chrysanthemum cinerariifolium (Trev.) Vis.,morphological characters,fertility of pollen grain and germination percentage of seeds. [Method] Pollen grains were prepared by sulphuric acid-acetyl oxide decomposition method. The lengths of polar axis and equatorial axis of pollen grains were determined with general optical microscope. The morphology of pollen grains was observed with SEM (scanning electron microscope) and the typical visual fields of 2 500× (or 2 000×),7 000× were taken pictures. [Result] Comparing with the diploid control line,the pollen grains of five tetraploid lines which were tested were different from the diploid line in morphology,sculpture,etc.. 4 of the 5 tested samples were significant larger than the diploid line in size and one was similar to the diploid line. [Conclusion] This research provided references for breeding tetraploid improved varieties of Chrysanthemum cinerariifolium (Trev.) Vis. with good fertility and high germination percentage. 展开更多
关键词 Chrysanthemum cinerariifolium (Trey.) Vis. Tetraploid Pollen grains Fertility
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Long memory of price-volume correlation in metal futures market based on fractal features 被引量:3
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作者 程慧 黄健柏 +1 位作者 郭尧琦 朱学红 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第10期3145-3152,共8页
An empirical test on long memory between price and trading volume of China metals futures market was given with MF-DCCA method. The empirical results show that long memory feature with a certain period exists in price... An empirical test on long memory between price and trading volume of China metals futures market was given with MF-DCCA method. The empirical results show that long memory feature with a certain period exists in price-volume correlation and a fittther proof was given by analyzing the source of multifractal feature. The empirical results suggest that it is of important practical significance to bring the fractal market theory and other nonlinear theory into the analysis and explanation of the behavior in metal futures market. 展开更多
关键词 metal futures price-volume correlation long memory MF-DCCA method MULTIFRACTAL fractal features multifractalspectrum
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Effects of temperature and age on physico-mechanical properties of cemented gravel sand backfills 被引量:5
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作者 JIANG Fei-fei ZHOU Hui +2 位作者 SHENG Jia KOU Yong-yuan LI Xiang-dong 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第10期2999-3012,共14页
Cemented backfill used in deep mines would inevitably be exposed to the ambient temperature of 20−60℃in the next few decades.In this paper,two types of cemented gravel sand backfills,cemented rod-mill sand backfill(C... Cemented backfill used in deep mines would inevitably be exposed to the ambient temperature of 20−60℃in the next few decades.In this paper,two types of cemented gravel sand backfills,cemented rod-mill sand backfill(CRB)and cemented gobi sand backfill(CGB),were prepared and cured at various temperatures(20,40,60℃)and ages(3,7,28 d),and the effects of temperature and age on the physico-mechanical properties of CRB and CGB were investigated based on laboratory tests.Results show that:1)the effects of temperature and age on the physico-mechanical properties of backfills mainly depend on the amount of hydration products and the refinement of cementation structures.The temperature has a more significant effect on thermal expansibility and ultrasonic performance at early ages.2)The facilitating effect of temperature and age on the compressive strength of CGB is higher than that on CRB.With the increase of temperature,the compressive failure modes changed from X-conjugate shear failure to tensile failure,and the integrity of specimens was significantly improved.3)Similarly,the shear performance of CGB is generally better than that of CRB.The temperature has a weaker effect on shear strength than age,but the shear deformation and shear plane morphology are closely related to temperature. 展开更多
关键词 cemented backfill gravel sand TEMPERATURE physico-mechanical properties deformation characteristics
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Study on Biological Characters of Asparagus macowanii Baker. 被引量:1
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作者 刘方农 彭世逞 刘联仁 《Agricultural Science & Technology》 CAS 2012年第11期2351-2354,共4页
Asparagus macowanfi Baker, is a climbing herbaceous foliage species in genus Asparagus of Liliaceae, This paper summarized its multiple uses, morphologi- cal characteristics, biological habit, reproduction methods, ma... Asparagus macowanfi Baker, is a climbing herbaceous foliage species in genus Asparagus of Liliaceae, This paper summarized its multiple uses, morphologi- cal characteristics, biological habit, reproduction methods, management after cultiva- tion, prevention and control of pests and disease, as well as harvest and grading, with the objective to provide references for the exploitation and utilization of As- paragus macowanii Baker. 展开更多
关键词 Asparagus macowanii Baker Biological Characters Multiple uses
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Structure and flaws of CuCr alloys by explosive compaction 被引量:4
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作者 李金平 孟松鹤 韩杰才 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2005年第2期134-138,共5页
CuCr alloys are prepared by mechanical alloying and explosive compaction. After we have studied their structure and flaws, the results show that the CuCr alloys have definite strength and toughness, while their fractu... CuCr alloys are prepared by mechanical alloying and explosive compaction. After we have studied their structure and flaws, the results show that the CuCr alloys have definite strength and toughness, while their fractured surface displays ductile characteristics. In the metallurgical structure, CuCr alloys are composed of two phases of uniform distribution; the SEM morphology is like thin strips with an end arrangement that is bonded to each other and the two-phase distribution of CuCr alloys is more homogenous. It is in only in a very small zone that formation of Cu-rich and Cr-rich phases take place. The flaws of the compaction samples are mainly central-holes and cracks. 展开更多
关键词 CuCr alloys explosive compaction MORPHOLOGY FLAWS
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Morphological and toxicity characteristics of Pseudo-nitzschia pungens strain PP0201-01 isolated from the East China Sea 被引量:5
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作者 李爱峰 于仁成 +2 位作者 王云峰 颜天 周名江 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2005年第4期418-426,共9页
The morphology and toxicity of Pseudo-nitzschia strain PP0201-01, isolated near the estuary of Changjiang (Yangtze) River in Year 2002 and tentatively identified as Pseudo-nitzschia pungens, were studied. The strain w... The morphology and toxicity of Pseudo-nitzschia strain PP0201-01, isolated near the estuary of Changjiang (Yangtze) River in Year 2002 and tentatively identified as Pseudo-nitzschia pungens, were studied. The strain was identified morphologically as P. pungens using scanning electronic microscope (SEM). The ana- lytical results of LC-PDA (liquid chromatography with photodiode array detector), LC-MS (liquid chromatogra- phy with mass detector), and the toxicity data from mouse bioassay, showed that no domoic acid was produced by the strain. However, the mechanism of domoic acid production by Pseudo-nitzschia species is complicated. More works are needed to assess the toxic species and to evaluate the potential risk of amnesic shellfish poison- ing (ASP) in China. 展开更多
关键词 domoic acid Pseudo-nitzschia pungens scanning electronic microscope (SEM) mouse bioassay LC-UV LC-MS
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Flooding Characteristics of Hydrofoil Impeller in a Two- and Three-phase Stirred Tank 被引量:2
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作者 蔡清白 戴干策 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第3期355-361,共7页
The flooding characteristics of hydrofoil impeller were systematically investigated in a two-and three-phase 383 mm i.d. stirred tank operated on air, water and spherical glass beads. The volumetric solid concen-trati... The flooding characteristics of hydrofoil impeller were systematically investigated in a two-and three-phase 383 mm i.d. stirred tank operated on air, water and spherical glass beads. The volumetric solid concen-tration Cs was varied from 0 to 25%. And the superficial gas velocity Ug was at the range of 0-0.096 m·s-1. A fast and objective method for identifying flooding point NF is developed based on the statistical analysis of the pressure fluctuation signals. It is found, the effect of solid concentration on the flooding point NF depends on the gas velocity. At the lower gas velocity (Ug = 0.010 m·s-1), the solid concentration has only a minor effect. However, it displays a very significant effect on the flooding point NF at the medium and high gas velocity. The flooding point NF linearly increases with the gas velocity Ug, at lower solid concentration (Cs = 0, 10%). When Cs = 20%, the behavior of NF versus Ug becomes more complex. The correlations of the flooding characteristics in the slurry stirred tank are proposed by considering the solid concentration effect. 展开更多
关键词 flooding point NF flooding/loading transition hydrofoil impeller power spectra analysis
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Multifractal Characteristics of Intermittent Turbulence in the Urban Canopy Layer 被引量:1
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作者 XU Jing-Jing HU Fei 《Atmospheric and Oceanic Science Letters》 CSCD 2015年第2期72-77,共6页
The multifractality of energy and thermal dissipation of fully developed intermittent turbulence is investigated in the urban canopy layer under unstable conditions by the singularity spectrum for the fractal dimensio... The multifractality of energy and thermal dissipation of fully developed intermittent turbulence is investigated in the urban canopy layer under unstable conditions by the singularity spectrum for the fractal dimensions of sets of singularities characterizing multifractals. In order to obtain high-order moment properties of smallscale turbulent dissipation in the inertial range, an ultrasonic anemometer with a high sampling frequency of 100 Hz was used. The authors found that the turbulent signal could be singular everywhere. Moreover, the singular exponents of energy and thermal dissipation rates are most frequently encountered at around 0.2, which is significantly smaller than the singular exponents for a wind tunnel at a moderate Reynolds number. The evidence indicates a higher intermittency of turbulence in the urban canopy layer at a high Reynolds number, which is demonstrated by the data with high temporal resolution. Furthermore, the temperature field is more intermittent than the velocity field. In addition, a large amount of samples could be used for verification of the results. 展开更多
关键词 urban canopy layer intermittent turbulence turbulent dissipation MULTIFRACTALITY singularity spectrum
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Effects of temperature fluctuations on cuttlebone formation of cuttlefish Sepia esculenta 被引量:2
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作者 雷舒涵 张秀梅 +1 位作者 刘松林 陈四清 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2012年第4期547-553,共7页
The morphological characteristics and the cuttlebone formation of Sepia esculenta exposed to different water temperature fluctuations were investigated under laboratory conditions. Temperature fluctuation cycles (15 ... The morphological characteristics and the cuttlebone formation of Sepia esculenta exposed to different water temperature fluctuations were investigated under laboratory conditions. Temperature fluctuation cycles (15 cycles, 60 d in total) consisted of the following three regimes of 4 d duration: keeping water temperature in 26℃ for 3 d (Group A), 2 d (Group B), 0 d (Group C, control); then keeping water temperature in 16℃ for the next 1, 2, 4 d. No significant difference in the survival rate was observed between the control and temperature fluctuation groups (P〉0.05). Lamellar depositions in a temperature fluctuation cycle were 2.45±0.02 for Group A, 2.00±0.02 for Group B, and 1.78±0.02 for Group C (P〈0.05). The relationship between age and number of lamellas in the cuttlebone of S. esculenta under each water temperature fluctuation could be described as the linear model and the number of lamellas in the cuttlebone did not correspond to actual age. Group A had the highest cuttlebone growth index (CGI), the lowest locular index (LI), and inter-streak distances comparing with those of control group. However, the number of lamellas and LI or CGI showed a quadratic relationship for each temperature fluctuation group. In addition, temperature fluctuations caused the breakage of cuttlebone dark rings, which was considered a thermal mark. The position of the breakage in the dark rings was random. This thermal mark can be used as supplementary information for marking and releasing techniques. 展开更多
关键词 Sepia esculenta cuttlebone formation temperature fluctuations cuttlebone growth index locular index inter-streak distances
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Effects of axial cyclic loading at constant confining pressures on deformational characteristics of anisotropic argillite 被引量:2
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作者 张久长 周苏华 +1 位作者 方理刚 许湘华 《Journal of Central South University》 SCIE EI CAS 2013年第3期799-811,共13页
Triaxial cyclic loading tests have been performed to assess the influence of plastic deformation on inelastic deformational properties of anisotropic argillite with bedding planes which is regarded as a kind of transv... Triaxial cyclic loading tests have been performed to assess the influence of plastic deformation on inelastic deformational properties of anisotropic argillite with bedding planes which is regarded as a kind of transversely isotropic media.Considering argillite's anisotropy and inelastic deformational properties,theoretical formulae for calculating oriented elastic parameters were deduced by the unloading curves,which can be better fitted for the description of its elasticity than loading curves.Test results indicate that with the growth of accumulated plastic,strain,the apparent elastic modulus of argillite decreases in a form of exponential decay function,whereas the apparent Poisson ratio increase in a form of power equation.A ratio of unloading recoverable strain to the total strain increment occurred during a loading cycle is defined to illustrate the characteristic relations between anisotropic coupled elasto-plastic deformation and plastic strain.It is significant to observe that high stress level and plastic history have an inhibiting effect on argillite anisotropy. 展开更多
关键词 anisotropic argillite coupled elasto-plasticity cyclic loading tests elastic parameters plastic strain
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High Phenotypic Variation in Morus alba L. along an Altitudinal Gradient in the Indian Trans-Himalaya 被引量:1
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作者 Prabodh K. BAJPAI Ashish R. WARGHAT +3 位作者 Ashish YADAV Anil KANT Ravi B. SRIVASTAVA Tsering STOBDAN 《Journal of Mountain Science》 SCIE CSCD 2015年第2期446-455,共10页
Ten quantitative morphological characters were studied in 56 Morus alba L. trees representing three natural populations from the trans-Himalayan Ladakh region. The altitude of collection sites ranged from 2815 to 3177... Ten quantitative morphological characters were studied in 56 Morus alba L. trees representing three natural populations from the trans-Himalayan Ladakh region. The altitude of collection sites ranged from 2815 to 3177 m above the sea level(asl). Coefficient of variation(CV) showed high phenotypic variation in M. alba. Linear regression analysis revealed that leaf and fruit size decreases with an increase in altitude. High CV was observed for leaf length, leaf width, petiole length, leaf area, internodal distance, number of nodes, bud length, fruit length, fruit width and fruit weight. Similarly, a high phenotypic plasticity index was observed for bud length, leaf length, leaf width, petiole length, leaf area, inter-nodal distance, number of nodes, fruit length, fruit width and fruit weight. For every 100 m increase in altitude, leaf length, leaf width and leaf area decreased by 1 cm, 0.8 cm and 16.6 cm2, respectively. Analysis of covariance showed a predominant altitudinal effect on the morphological characters in comparison to the population effect. A small change in the altitude caused significant change in the plant morphological characteristics. The present investigation represents to our knowledge the first study addressing phenotypic variation in mulberryalong an altitudinal gradient. 展开更多
关键词 Adaptation LADAKH LEAF MORPHOMETRY MULBERRY Morus alba Stress
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Buckling analysis of the shell of a refuge chamber in a coal mine under uniform axial compression 被引量:4
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作者 Fang Haifeng Ge Shirong +1 位作者 Cai Lihua Hu Eryi 《International Journal of Mining Science and Technology》 2012年第1期85-88,共4页
A stiffened cylindrical shell is normally used in refuge chambers of a coal mine. Based on the method of application and shape characteristics of a refuge chamber, we simplified its shell as an orthotropic cylinder. T... A stiffened cylindrical shell is normally used in refuge chambers of a coal mine. Based on the method of application and shape characteristics of a refuge chamber, we simplified its shell as an orthotropic cylinder. The basic buckling equation of the stiffened cylindrical shell under uniform axial compression was deduced by using a Donnell function. The factors affecting its buckling capacity were studied by theoretical analysis and numerical calculations. The results reveal that the torsional rigidity of the longitudinal stiffener had little effect on the buckling capacity of the shell and that the critical load of an externally stiffened cylindrical shell is higher than that of an internally stiffened cylindrical shell. 展开更多
关键词 Refuge chamber BUCKLING Axial compression Stiffened cylindrical shell
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Morphological Study of Ficus deltoidea Jack in Malaysia
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作者 Nor Asiah Awang Sayed M.Zain Hasan Mohammad Shafie B.Shafie 《Journal of Agricultural Science and Technology(B)》 2013年第2期144-150,共7页
Ficus deltoidea Jack (Moraceae) or Mas Cotek is a small shrub with a great morphological variation. Measurement of 40 morphological traits had been done on 50 accessions to find the most significant characters that ... Ficus deltoidea Jack (Moraceae) or Mas Cotek is a small shrub with a great morphological variation. Measurement of 40 morphological traits had been done on 50 accessions to find the most significant characters that enable differentiation being done according to its variety groups. The data were analyzed with principal component analysis (PCA) and cluster analysis (CA) using cluster software package programme to produce the scatter diagram and dendrogram relationship of the taxa. The results showed that there were 25 morphological characters having the value of factor analysis greater than 0.60 from its principal component (PC) with the Eigen value greater than 1.0. 16 out of 40 morphological characters had been identified as having high values of correlation coefficient ranging from -0.783 to 0.890. The analysis showed that the most responsible characters in grouping the samples into different groups are the shape and size of leaf, number and color of dots on the leaf surface and characters of syconium. The scatter diagram of the accessions on the PC1 against PC2 showed six major groups. The dendrogram displayed the relationship among the accessions and within the dissimilarity distance = 19, it classified the samples into five major groups. Observation on F. deltoidea resulted in the findings of high variability among the accessions. The most significant characters in grouping accessions are the shapes of leaf base (BL), shape of leaf apex (SA), ratio of lamina width to lamina length (R), dots color at the lower midrib (DLM), color of young syconium (CYS), color of mature syconium (CMS) and the number of syconium on trees (DST). This study provides basic information for introduction of some particular traits and effective conservation of the species breeding programme. The morphological traits were found to be useful for the diversity studies and in identifying the variation. The actual figures of F. deltoidea obtained through this study enable comparison being done to the previous and in future study. Hence, the varieties that are extinct could be recognised. 展开更多
关键词 Ficus deltoidea cluster analysis DIVERSITY morphological variability principal component analysis
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Cymolomia hartigiana (Saxesen,1840)(Lepidoptera: Tortricidae) at-tacking to Abies nephrolepis Max. New to Daxing'anling,Heilongji-ang,China
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作者 边凤奎 李成德 张立志 《Journal of Forestry Research》 SCIE CAS CSCD 2004年第1期67-68,J003,共3页
An Olethreutine speciesCymolomia hartigiana (Saxesen, 1840), attacking toAbies nephrolepis Max., is reported for the first time from Daxing'anling, Heilongjiang, China. The morphological characteristics are briefl... An Olethreutine speciesCymolomia hartigiana (Saxesen, 1840), attacking toAbies nephrolepis Max., is reported for the first time from Daxing'anling, Heilongjiang, China. The morphological characteristics are briefly re-described with illustrations. Also its damage and biology are noted. Key words Systematics - Lepidoptera - Tortricidae - Cymolomia - Daxing'anling - China CLC number Q969.429.2 - S763.3 Document code A Foundation item: This study was carried out under the financial support by KOSEF (Korea Science & Engineering Foundation) with the program of “Korea and China Young Scientist Exchange Program” (2002–2003).Biography: *BYUN Bong-Kya (1963-), male, Ph.D., Researcher in Korea National Arboretum, Korea.Responsible editor: Chai Ruihai 展开更多
关键词 SYSTEMATICS LEPIDOPTERA TORTRICIDAE Cymolomia Daxing'anling China
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Deformation characteristics and constitutive model of seafloor massive sulfides
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作者 胡建华 刘少军 +1 位作者 张瑞强 胡琼 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第9期1986-1991,共6页
Deformation characteristics and constitutive model of seafloor massive sulfide(SMS)were selected as the research object.Uniaxial/triaxial compression test were carried out on the mineral samples,and the deformation ch... Deformation characteristics and constitutive model of seafloor massive sulfide(SMS)were selected as the research object.Uniaxial/triaxial compression test were carried out on the mineral samples,and the deformation characteristics of specimens under various conditions were studied.According to characteristics of the mineral,a new three stages constitutive equation was proposed.The conclusions are as follows:The axial strain,peak strain and maximum strength of seafloor massive sulfide increase with the confining pressure.The elastic modulus of the metal sulfide samples is decreased sharply with the increase of confining pressure.According to characteristics of seafloor massive sulfide,the constitutive equation is divided into three parts,the comparison between theoretical curves and experimental data shows that both of them are in good agreement,which also proves the correctness of the constitutive equation for uniaxial compression. 展开更多
关键词 seafloor massive sulfide constitutive model failure characteristics DAMAGE uniaxial strain triaxial strain
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