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Tsallis holographic dark energy under complex form of quintessence model
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作者 J Sadeghi S Noori Gashti T Azizi 《Communications in Theoretical Physics》 SCIE CAS CSCD 2023年第2期157-167,共11页
In this paper,we use a Tsallis holographic dark energy model in two forms,interacting and noninteracting cases,to acquire some parameters as the equation of state for the energy density of the Tsallis model in the FRW... In this paper,we use a Tsallis holographic dark energy model in two forms,interacting and noninteracting cases,to acquire some parameters as the equation of state for the energy density of the Tsallis model in the FRW Universe concerning the complex form of quintessence model.We will study the cosmology of complex quintessence by revamping the potential and investigating the scalar field dynamics.Then we analyze(w-w’)and stability in two cases,i.e.noninteracting and interacting.We will explore whether these cases describe a real Universe by calculating fractional energy densityΩ_(D)and concerning two parts of the quintessence field effect(complex and real part)by considering the real part of this field to be a slow-roll field.We know that the part in which the fractional energy density(Ω_(D)>1)does not describe a real Universe.Also,we specified an interacting coupling parameter b2that depends on the constant parameter of the Tsallis holographic model(δ)with respect to fractional energy density(0.73).Unlike independence between the fractional energy density and interacting coupling in the real quintessence model,we determine a relationship among these parameters in this theory.Finally,by plotting some figures,we specify the features of(w-w’)and(ν^(2)_(s))in two cases and compare the result with each other. 展开更多
关键词 Tsallis holographic model complex form of quintessence model STABILITY
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SLANT IMMERSIONS OF COMPLEX SPACE FORMS AND CHEN'S INEQUALITY 被引量:10
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作者 李光汉 吴传喜 《Acta Mathematica Scientia》 SCIE CSCD 2005年第2期223-232,共10页
A submanifold in a complex space form is called slant if it has constant Wirtinger angles. B. Y. Chen and Y. Tazawa proved that there do not exist minimal proper slant surfaces in CP2 and CH2. So it seems that the sla... A submanifold in a complex space form is called slant if it has constant Wirtinger angles. B. Y. Chen and Y. Tazawa proved that there do not exist minimal proper slant surfaces in CP2 and CH2. So it seems that the slant immersion has some interesting properties. The authors have great interest to consider slant immersions satisfying some additional conditions, such as unfull first normal bundles or Chen’s equality holding. They prove that there do not exist n-dimensional Kaehlerian slant immersions in CPn and CHn with unfull first normal bundles. Next, it is seen that every Kaehlerian slant submanifold satisfying an equality of Chen is minimal which is similar to that of Lagrangian immersions. But in contrast, it is shown that a large class of slant immersions do not exist thoroughly. Finally, they give an application of Chen’s inequality to general slant immersions in a complex projective space, which generalizes a result of Chen. 展开更多
关键词 Slant immersion IDEAL Chen's inequality complex space form
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Simulating Some Complex Phenomena in Hydrothermal Ore-Forming Processes by Reaction-Diffusion CNN 被引量:1
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作者 Xu Deyi Yu Chongwen Bao Zhengyu Geochemistry Institute, China University of Geosciences, Wuhan 430074 《Journal of China University of Geosciences》 SCIE CSCD 2003年第3期215-219,共5页
Complexity phenomena like dynamic and static patterns, order from disorder, chaos and catastrophe were simulated by the application of 2-D reaction-diffusion CNN of two state variables and two diffusion coefficients t... Complexity phenomena like dynamic and static patterns, order from disorder, chaos and catastrophe were simulated by the application of 2-D reaction-diffusion CNN of two state variables and two diffusion coefficients transformed from Zhabotinksii model. They revealed somehow the mechanism of hydrothermal ore-forming processes, and answered several questions about the onset of ore forming. 展开更多
关键词 hydrothermal ore forming complexity reaction-diffusion CNN
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KOPPELMAN-LERAY FORMULA ON COMPLEX MANIFOLDS 被引量:1
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作者 钟同德 《Acta Mathematica Scientia》 SCIE CSCD 1995年第1期90-94,共5页
The Koppelman-Leray formula on complex manifolds is obtained, and under suitable condition the continuous solution of partial derivative-equation on complex manifolds is obtained.
关键词 complex MANIFOLDS CHERN form KOPPELMAN-LERAY formULA PARTIAL-DERIVATIVE-EQUATION
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COMPLEX INNER PRODUCT AVERAGING METHOD FOR CALCULATING NORMAL FORM OF ODE 被引量:1
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作者 CHEN Yu-shu(陈予恕) +1 位作者 SUN Hong-jun(孙洪军) 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2001年第12期1368-1374,共7页
This paper puts forward a complex inner product averaging method for calculating normal form of ODE. Compared with conventional averaging method, the theoretic analytical process has such simple forms as to realize co... This paper puts forward a complex inner product averaging method for calculating normal form of ODE. Compared with conventional averaging method, the theoretic analytical process has such simple forms as to realize computer program easily. Results can be applied in both autonomous and non-autonomous systems. At last, an example is resolved to verify the method. 展开更多
关键词 nonlinear dynamic system normal form complex inner product averaging method
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RIGIDITY THEOREMS OF COMPLETE K?HLER-EINSTEIN MANIFOLDS AND COMPLEX SPACE FORMS
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作者 Tian CHONG Yuxin DONG +1 位作者 Hezi LIN Yibin REN 《Acta Mathematica Scientia》 SCIE CSCD 2019年第2期339-356,共18页
We concentrate on using the traceless Ricci tensor and the Bochner curvature tensor to study the rigidity problems for complete K?hler manifolds. We derive some elliptic differential inequalities from Weitzenb?ck form... We concentrate on using the traceless Ricci tensor and the Bochner curvature tensor to study the rigidity problems for complete K?hler manifolds. We derive some elliptic differential inequalities from Weitzenb?ck formulas for the traceless Ricci tensor of K?hler manifolds with constant scalar curvature and the Bochner tensor of K?hler-Einstein manifolds respectively. Using elliptic estimates and maximum principle, several L^p and L~∞ pinching results are established to characterize K?hler-Einstein manifolds among K?hler manifolds with constant scalar curvature and complex space forms among K?hler-Einstein manifolds.Our results can be regarded as a complex analogues to the rigidity results for Riemannian manifolds. Moreover, our main results especially establish the rigidity theorems for complete noncompact K?hler manifolds and noncompact K?hler-Einstein manifolds under some pointwise pinching conditions or global integral pinching conditions. To the best of our knowledge,these kinds of results have not been reported. 展开更多
关键词 rigidity theorems Kahler-Einstein complex space forms
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Commuting Structure Jacobi Operator for Real Hypersurfaces in Complex Space Forms
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作者 U-Hang Ki Hiroyuki Kurihara 《Advances in Pure Mathematics》 2013年第2期264-276,共13页
Let M be a real hypersurface of a complex space form with almost contact metric structure (φ,ξ,η,g). In this paper, we prove that if the structure Jacobi operator Rξ=(·,ξ) ξ is φ▽ξξ-parallel and Rξ com... Let M be a real hypersurface of a complex space form with almost contact metric structure (φ,ξ,η,g). In this paper, we prove that if the structure Jacobi operator Rξ=(·,ξ) ξ is φ▽ξξ-parallel and Rξ commute with the shape operator, then M is a Hopf hypersurface. Further, if Rξ is φ▽ξξ-parallel and Rξ commute with the Ricci tensor, then M is also a Hopf hypersurface provided that TrRξ is constant. 展开更多
关键词 complex Space form Hopf HYPERSURFACE STRUCTURE JACOBI OPERATOR Shape OPERATOR RICCI Tensor
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ON THE DECOMPOSITION OF COMPLEX VECTOR SPACES AND THE JORDAN CANONICAL FORM OF COMPLEX LINEAR TRANSFORMATIONS
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作者 肖衡 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1994年第11期997-1003,共7页
New objects characterizing the structure of complex linear transformations areintroduced. These new objects yield a new result for the decomposition of complexvector spaces relative to complex lrnear transformations a... New objects characterizing the structure of complex linear transformations areintroduced. These new objects yield a new result for the decomposition of complexvector spaces relative to complex lrnear transformations and provide all Jordan basesby which the Jordan canonical form is constructed. Accordingly, they can result in thecelebrated Jordan theorem and the third decomposition theorem of space directly. and,moreover, they can give a new deep insight into the exquisite and subtle structure ofthe Jordan form. The latter indicates that the Jordan canonical form of a complexlinear transformation is an invariant structure associated with double arbitrary. choices. 展开更多
关键词 complex vector space complex linear transformation. decompo-sition theorems. Jordan canonical form
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Residues of Logarithmic Differential Forms in Complex Analysis and Geometry
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作者 A.G.Aleksandrov 《Analysis in Theory and Applications》 2014年第1期34-50,共17页
In the article, we discuss basic concepts of the residue theory of logarithmic and multi-logarithmic differential forms, and describe some aspects of the theory, de-veloped by the author in the past few years. In part... In the article, we discuss basic concepts of the residue theory of logarithmic and multi-logarithmic differential forms, and describe some aspects of the theory, de-veloped by the author in the past few years. In particular, we introduce the notion of logarithmic differential forms with the use of the classical de Rham lemma and give an explicit description of regular meromorphic differential forms in terms of residues of logarithmic or multi-logarithmic differential forms with respect to hypersurfaces, com-plete intersections or pure-dimensional Cohen-Macaulay spaces. Among other things, several useful applications are considered, which are related with the theory of holo-nomic D-modules, the theory of Hodge structures, the theory of residual currents and others. 展开更多
关键词 Logarithmic differential forms de Rham complex regular meromorphic forms holo-nomic D-modules Poincare lemma mixed Hodge structure residual currents.
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A method for calculation of ion distribution in reaction system forming hydroxide
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作者 金哲男 郑大录 +3 位作者 洪正秀 郑英勋 路殿坤 陈国宝 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第12期3793-3798,共6页
A formula was proposed to calculate the distribution of metal ions quantitatively in chemical reaction system forming hydroxide where precipitation and complex are formed together. The effects of some factors on forma... A formula was proposed to calculate the distribution of metal ions quantitatively in chemical reaction system forming hydroxide where precipitation and complex are formed together. The effects of some factors on formation of precipitation and complex were investigated, and the corresponding precipitation rates of zinc, iron (III), aluminum, copper and magnesium were calculated. As a result, it shows that the proposed formula is reliable. By the proposed formula, the existence state of metal ions in hydroxides reaction system with any metal ions can be well described and the effects of some factors on the distribution of metal ions were determined. 展开更多
关键词 HYDROXIDE metal ions distribution precipitation rate complex forming rate
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连山关地区铀矿地质钻探技术优化
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作者 王琳 孙祺斌 +2 位作者 刘忠存 王野 丛源鹏 《现代矿业》 CAS 2024年第5期27-30,35,共5页
由于连山关地区存在着地层复杂、岩石胶结松散、水敏性强等诸多不利因素,钻探施工中存在钻孔漏失、掉块卡钻以及坍塌埋钻等问题,导致钻孔报废,降低了铀矿地质钻探施工的经济效益。为了解决以上问题,以ZK93-1孔钻为对象,针对铀矿地质地... 由于连山关地区存在着地层复杂、岩石胶结松散、水敏性强等诸多不利因素,钻探施工中存在钻孔漏失、掉块卡钻以及坍塌埋钻等问题,导致钻孔报废,降低了铀矿地质钻探施工的经济效益。为了解决以上问题,以ZK93-1孔钻为对象,针对铀矿地质地层特性以及常用设备、泥浆等存在的不利因素,对钻孔设备进行优化,选用CSD-1800A型全液压动力头钻机、HQ绳索取心钻具,并配备镦粗钻杆的NQ绳索取心钻具,提高了钻进效率及安全性,也降低了劳动强度;选用成膜防塌无固相冲洗液,有效降低钻孔偏斜,保证了岩矿心采取率,降低了施工成本,为类似地质条件地区的钻探工作提供参考依据。 展开更多
关键词 铀矿地质钻探 复杂地层 钻孔事故 成膜防塌无固相冲洗液
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RESEARCH ON HOT FORMING PROCESS OF A RETAINING RING OF HIGH-NITROGEN STEEL 被引量:4
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作者 H.Q.Chen J.S.Liu H.G.Guo 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2004年第5期767-770,共4页
Mn18Cr18N, the high-nitrogen steel, is the 2nd generation material for manufacturing the retaining ring of firepower generators. In this paper, the hot deformation behavior of the material was investigated by thermo-m... Mn18Cr18N, the high-nitrogen steel, is the 2nd generation material for manufacturing the retaining ring of firepower generators. In this paper, the hot deformation behavior of the material was investigated by thermo-mechanical modeling tests. And the flow stress curves of the steel were obtained for various combinations of the temperature and strain rate. Based on the results of the tests, the complex forming process of a retaining ring including punching, expanding and extrusion with an enclosure was put forward and simulated by means of numerical simulation method. The results indicate that the process is a novel and force-saved practical technology for manufacturing heavy retaining rings. 展开更多
关键词 Mn18Cr18N high-nitrogen steel a retaining ring the punching with an enclosure process expanding-extrusion complex forming
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冷弯不等肢复杂卷边角钢轴压试验及承载力设计方法
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作者 姚行友 胡成立 +1 位作者 聂泽谕 郭彦利 《建筑钢结构进展》 CSCD 北大核心 2024年第9期34-44,共11页
为研究冷弯薄壁不等肢复杂卷边角钢屈曲性能和稳定承载力设计方法,对24根不同截面、长细比、宽厚比的不等肢复杂卷边角钢进行了轴压试验。试验结果表明,长细比较大且宽厚比较小的试件易发生弯扭屈曲,长细比较小而宽厚比较大的试件易发... 为研究冷弯薄壁不等肢复杂卷边角钢屈曲性能和稳定承载力设计方法,对24根不同截面、长细比、宽厚比的不等肢复杂卷边角钢进行了轴压试验。试验结果表明,长细比较大且宽厚比较小的试件易发生弯扭屈曲,长细比较小而宽厚比较大的试件易发生局部屈曲或弯扭和局部相关屈曲。采用ABAQUS有限元软件对试件进行了有限元模拟,屈曲模式和承载力与试验结果吻合良好,表明建立的有限元分析模型是可行的。因此可采用经验证的有限元模型对不同长细比、卷边形式和卷边比的轴心受压不等肢复杂卷边角钢进行了参数化分析。结果表明,试件极限承载力受长细比的影响最为明显,将卷边比控制在一定范围内或改变卷边形式可提高试件极限承载力。最后将试验结果与直接强度法计算结果进行对比,表明直接强度法计算试件承载力较不安全。因此基于试验和数值分析结果提出轴心受压冷弯薄壁不等肢复杂卷边角钢构件考虑整体屈曲后强度的直接强度法修正公式,并通过对比试验结果和有限元分析结果验证了该修正公式的准确性和可行性。 展开更多
关键词 冷弯薄壁型钢 不等肢复杂卷边角钢 弯扭屈曲 局部屈曲 直接强度法
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冀北招兵沟铁磷矿床成矿时代及成因研究 被引量:1
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作者 王亿 李立兴 +6 位作者 李厚民 李小赛 马兰晶 邢玉亮 孙欣宇 戴阳 王小慧 《现代地质》 CAS CSCD 北大核心 2024年第1期46-55,共10页
为探讨冀北—辽西地区太古宙变质岩系中铁磷矿床的成因问题,本研究选取招兵沟矿床开展了岩相学、年代学和地球化学研究。野外观察表明,前人描述的条带状铁磷矿石实际上大多为含铁磷矿脉的黑云角闪斜长片麻岩,可见铁磷矿脉切穿片麻理。... 为探讨冀北—辽西地区太古宙变质岩系中铁磷矿床的成因问题,本研究选取招兵沟矿床开展了岩相学、年代学和地球化学研究。野外观察表明,前人描述的条带状铁磷矿石实际上大多为含铁磷矿脉的黑云角闪斜长片麻岩,可见铁磷矿脉切穿片麻理。含铁磷黑云角闪斜长片麻岩中的锆石与矿石矿物铁钛氧化物和磷灰石密切共生。阴极发光图像上显示基性岩浆锆石特征,无/弱环带或斑块状结构,LA-ICP-MS U-Pb定年获得^(206)Pb/^(238)U加权平均年龄为(282±3)Ma(MSWD=0.78),指示铁磷矿化时代为早二叠世,而非传统认为的新太古代。招兵沟含铁磷黑云角闪斜长片麻岩与区域辉石-角闪石岩侵入体形成时代接近,微量元素地球化学特征相似度高,说明成矿母岩为辉石-角闪石岩。招兵沟铁磷成矿与冀北地区沿红石砬—大庙断裂带发育的显生宙阿拉斯加型镁铁-超镁铁质岩浆活动密切相关。综合来看,招兵沟铁磷矿床可能是与基性岩浆活动有关的矿床,而非传统认为的变质型矿床,其他相似矿床的成因也需要进一步研究。 展开更多
关键词 铁磷矿床 成矿年龄 矿床成因 阿拉斯加型岩体 华北克拉通
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复杂型腔电解加工成形规律分析及试验研究
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作者 杨柳柳 王忠恒 +1 位作者 刘超 赵建社 《航空制造技术》 CSCD 北大核心 2024年第18期46-53,共8页
电解加工适用于包含复杂型腔的难加工材料整体构件的高效加工,但复杂型腔电解加工时加工余量的分布需进一步深入研究。针对阴极曲面上各点法向与进给方向夹角不同时工件成形过程存在差异的问题,对阴极建立特定夹角处加工间隙的微分方程... 电解加工适用于包含复杂型腔的难加工材料整体构件的高效加工,但复杂型腔电解加工时加工余量的分布需进一步深入研究。针对阴极曲面上各点法向与进给方向夹角不同时工件成形过程存在差异的问题,对阴极建立特定夹角处加工间隙的微分方程,模拟不同法向与进给方向夹角,并采用规则形状阴极开展直流电解加工和脉冲振动耦合电解加工工艺对比试验,以优选合适的微分方程模拟复杂型腔在上述加工模式下的成形过程。研究成果已应用于闭式整体叶盘叶间流道的电解加工。 展开更多
关键词 复杂型腔 电解加工 成形规律 加工间隙 数值分析 整体叶盘
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化学药品仿制药眼用制剂质量研究总体要求和关注点探讨
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作者 张保梅 罗俊永 +1 位作者 陆骁骏 李珊珊 《药学研究》 CAS 2024年第8期781-784,814,共5页
由于眼部的敏感性及独特的解剖学和生理学特点,相比其他外用制剂,眼用制剂在质量控制方面要求更为严格。在文献调研和日常审评工作基础上,主要参考国内外相关技术指南及法规要求,对化学药品仿制药眼用制剂的质量研究进行探讨,主要包括... 由于眼部的敏感性及独特的解剖学和生理学特点,相比其他外用制剂,眼用制剂在质量控制方面要求更为严格。在文献调研和日常审评工作基础上,主要参考国内外相关技术指南及法规要求,对化学药品仿制药眼用制剂的质量研究进行探讨,主要包括质量研究的总体要求及主要关注点,如微生物方面的考虑、释放或溶出及稳定性设计等。通过本文的探讨,以期为业界仿制药眼用制剂尤其是复杂制剂的开发或为我国监管机构提供参考。 展开更多
关键词 眼用制剂 复杂剂型 质量研究 释放或溶出 微生物学
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Study on precision cutting technology of complex shape microparts
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作者 王贵林 张飞虎 戴一帆 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2007年第4期528-532,共5页
Relatively to non-traditional and high-energy-beam micro-manufacturing technique, the micro-cutting technology has many merits. For instance, the machining range is bigger, the cost of equipments is much lower, and th... Relatively to non-traditional and high-energy-beam micro-manufacturing technique, the micro-cutting technology has many merits. For instance, the machining range is bigger, the cost of equipments is much lower, and the productivity and machining accuracy are higher. Therefore, the micro-cutting technology will take an important effect on the machining technique of complex shape microparts. In this paper, based on selfly-developed machine tool, the precision cutting technology of complex shape microparts made of metal material was studied by analyzing the modeling method on complex shape, the means of toolpaths layout and the optimal selection for cutting parameters. On the basis of above work, a typical duralumin specimen of high precision, low surface roughness and complex shape micropart was manufactured. This result will provide favorable technical support for farther research on the micro-cutting technology. 展开更多
关键词 complex form microparts MOLDING CUTTING
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T2紫铜复杂异形零件渐进微冲裁工艺研究
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作者 郭思宇 马晓光 赵敬伟 《塑性工程学报》 CAS CSCD 北大核心 2024年第9期54-59,共6页
为探究厚度为0.2 mm的介观尺度T2紫铜复杂异形成形件的渐进微冲裁工艺,通过金相腐蚀和拉伸试验获得T2紫铜薄带的微观组织及力学性能,分别利用传统微冲裁工艺与渐进微冲裁工艺制备复杂异形零件,并通过三维激光电镜和扫描电镜对成形件的... 为探究厚度为0.2 mm的介观尺度T2紫铜复杂异形成形件的渐进微冲裁工艺,通过金相腐蚀和拉伸试验获得T2紫铜薄带的微观组织及力学性能,分别利用传统微冲裁工艺与渐进微冲裁工艺制备复杂异形零件,并通过三维激光电镜和扫描电镜对成形件的整体形貌和冲裁断口形貌进行了观测分析。结果表明,渐进微冲裁成形技术与传统微冲裁工艺相比,成形件的尺寸精度和形状精度较高,该工艺可显著降低传统微冲裁工艺中的冲裁件断面圆角带面积,改善撕裂带形貌与光亮带的表面光洁度,获得更好的冲裁断面质量。 展开更多
关键词 铜薄带 渐进微冲裁 复杂异形件 成形质量
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南秦岭镇安西部钨钼矿集区成矿物质来源研究
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作者 韩珂 杨兴科 《黄金科学技术》 CSCD 北大核心 2024年第1期13-30,共18页
为了查明南秦岭镇安西部大型钨钼多金属矿集区成矿物质来源,在矿床基础地质研究的基础上,运用岩石地球化学、硫化物单矿物硫同位素地球化学和锆石U-Pb同位素、辉钼矿Re-Os同位素地球化学等方法,对复式中酸性侵入体与钨钼成矿的时空关系... 为了查明南秦岭镇安西部大型钨钼多金属矿集区成矿物质来源,在矿床基础地质研究的基础上,运用岩石地球化学、硫化物单矿物硫同位素地球化学和锆石U-Pb同位素、辉钼矿Re-Os同位素地球化学等方法,对复式中酸性侵入体与钨钼成矿的时空关系和成因联系进行深入研究。结果表明:懒板凳岩体田湾单元、王家坪隐伏岩体和花岗细晶岩脉富集Si元素,且Mg#值和稀土总量较低,稀土元素配分曲线呈明显的四分组效应并具有强负Eu异常,岩浆分异结晶程度高;懒板凳岩体九间屋单元和王家坪隐伏岩体锆石U-Pb同位素年龄分别为(222.7±2.6)Ma和(201.6±4.7)Ma,棋盘沟钨矿床和江口钼矿床中辉钼矿Re-Os同位素模式年龄分别为(199.7±3.9)Ma和(198.7±3.9)Ma;钨钼矿床中硫化物单矿物δ34S值为3.6‰~10.2‰,推测成矿物质来源于复式岩体晚阶段形成于190~200Ma之间的高分异演化酸性侵入体。 展开更多
关键词 钨钼矿集区 成矿物质来源 复式岩体 镇安西部 南秦岭
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老挝班康姆铜金矿床“岩浆核杂岩”隆起-拆离带构造控矿特征
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作者 赵俊宏 杨人毅 +3 位作者 吕古贤 赵延朋 康铁锁 陈晓峰 《现代地质》 CAS CSCD 北大核心 2024年第4期1067-1075,共9页
老挝班康姆铜金矿床位于东南亚思茅—彭世洛地块南缘构造活跃带,是与中生代岩浆岩有关的大型铜金矿床。该区具有巨大的资源潜力,但地质研究程度相对较低,其成矿模式和演化规律等理论问题尚未完全解决。本文通过对成矿岩体分布特征、断... 老挝班康姆铜金矿床位于东南亚思茅—彭世洛地块南缘构造活跃带,是与中生代岩浆岩有关的大型铜金矿床。该区具有巨大的资源潜力,但地质研究程度相对较低,其成矿模式和演化规律等理论问题尚未完全解决。本文通过对成矿岩体分布特征、断裂构造变形特征和拆离带构造成矿特征的研究,揭示矿床岩浆核杂岩隆起特征与拆离带构造特征,认为班康姆矿床受控于“岩浆核杂岩”及其边界的隆起-拆离带构造,为岩浆核杂岩隆起-拆离带构造热液铜金矿床。班康姆矿床“岩浆核杂岩”构造由“岩浆杂岩体核、拆离带构造和火山-沉积岩”三个部分组成,岩浆杂岩体核主要由花岗闪长岩组成。花岗闪长岩与安山岩和灰岩接触带下盘发育有似片麻理构造,片理产状以核部花岗闪长岩为中心,呈现外倾的特征,推断为岩浆岩上侵过程中受到区域挤压剪切应力的作用形成。磁法和激电测量结果,反映班康姆矿床矿化蚀变带和岩浆核杂岩的分布关系,结合地质实测的岩体分布信息,推测深部存在隐伏岩体。拆离带构造发育于下盘花岗闪长岩体与上盘火山-沉积岩之间,是铜金矿化的集中地段,且拆离带构造中矿化蚀变岩的形成年龄(244~251 Ma),晚于杂岩体侵位年龄(264±10 Ma)。通过对拆离带构造及两侧小型构造观测与分析,可知拆离带构造剖面上呈上陡下缓的“铲”式形态学特征,具有明显的早期韧性变形、晚期脆性变形的特点,其上盘的主运动方向为NWW向。本文提出班康姆铜金矿床的东南部同样具有“岩浆核杂岩”隆起-拆离带构造成矿模式的特征,为有利的找矿靶区。 展开更多
关键词 班康姆铜金矿床 岩浆核杂岩隆起 拆离带构造 成矿特征
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