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THE BLOSSOM APPROACH TO THE DIMENSION OF THE BIVARIATE SPLINE SPACE

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Journal of Computational Mathematics 2000年第2期18卷 183-198页

作者： Zhi-bin Chen yu-yu feng Jernej Kozak Department of Mathematics University of Science and Technology of ChinaHefei 230026China Department of Mathematics University of Ljubljana1000 LiubljanaSlovenija

Presents information on a study which outlined the blossom approach to the dimension count of bivariate spline space. Smoothness conditions in blossoming form; Application of the approach to the case of Morgan-Scott p... 详细信息

关键词： bivariate spline space blossom dimension

Solar trough receiver with V-grooved light traps for efficiency improvement

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Science China Technological Sciences 2025年第1期 146-156页

作者： bin LIU Qing LI yu QIU School of Energy Science and Engineering Central South University

Parabolic trough collector is a promising technology for both domestic and industrial heat supplies. To enhance the collector efficiency, a modified trough receiver with dozens of V-grooved light traps incorporated into its lower-half absorber was introduced. For assessing the performance of this receiver, a solar-thermal-stress coupled model was established. Using this model, firstly, the effects of the V-grooved light traps were investigated. The results reveal that, compared to the conventional trough receiver, the modified trough receivers equipped with different traps can reduce their optical losses by 81.9–138.0 Wm-1（i.e., 15.0%–25.2%）, improving their optical efficiencies by 1.60%–2.69%. However, these traps also result in increased thermal loss from the receiver. Therefore, there is no single optimal modified trough receiver that consistently outperforms all other receivers across all possible conditions. Nonetheless, the MTR30-3 and MTR60-3 receivers emerge as the optimized choices due to their better solar-thermal performance. Subsequently, performance evaluation reveals that the two optimized receivers can enhance the receiver efficiencies within the typical solar irradiance range by 0.02%–2.65% and 0.05%–1.70% when the inlet fluid temperatures are below 488 and 523 K, respectively. Consequently, the collector efficiencies can be improved by 0.02%–2.49% and 0.05%–1.60%, respectively. Additionally, thermal stress analysis verifies that the two optimized receivers remain within safe limits under all typical conditions. Given that the heating temperature of a typical solar collector for domestic or industrial heat supply is typically below 523 K, the integration of the two optimized receivers has the capability to effectively enhance the overall collector efficiency.

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西藏东窝东矿床矿化蚀变过程元素迁移及绢云母^(40)Ar-^(39)Ar年代学及其地质意义

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岩矿测试 2017年第4期36卷 440-449页

作者：侯淋唐菊兴林彬宋扬王勤李玉彬冯军李彦波陈列唐晓倩中国地质大学(北京)地球科学与资源学院北京100083 中国地质科学院矿产资源研究所北京100037 成都理工大学四川成都610059 西藏自治区地质调查院西藏拉萨850012 西藏金龙矿业股份有限公司西藏拉萨850000 西藏地质矿产勘查开发局第五地质大队青海格尔木816000 北京中矿联咨询中心北京100044

东窝东铜多金属矿床位于羌塘地体南缘,多龙铜金矿集区东侧。该矿床尚未开展矿化蚀变时限、成矿作用中元素迁移特征等问题的研究。为确定矿床的蚀变矿化作用时限,本文对东窝东矿床的黄铁绢英岩化蚀变带中的蚀变绢云母进行了^(40)Ar-^(39... 详细信息

东窝东铜多金属矿床位于羌塘地体南缘,多龙铜金矿集区东侧。该矿床尚未开展矿化蚀变时限、成矿作用中元素迁移特征等问题的研究。为确定矿床的蚀变矿化作用时限,本文对东窝东矿床的黄铁绢英岩化蚀变带中的蚀变绢云母进行了^(40)Ar-^(39)Ar年代学测试,获得^(40)Ar-^(39)Ar坪年龄为122.20±0.84 Ma,该年龄与已有的斑岩体侵位时代(122 Ma)一致,说明东窝东矿床黄铁绢英岩化蚀变与斑岩体侵位有密切联系。此外,对比分析地表弱蚀变和钻孔中强黄铁绢英岩化花岗闪长斑岩的岩石地球化学结果,运用"等浓度线(isocon)方程"及其推导方程,探讨黄铁绢英岩化蚀变过程中的不同元素的带入、带出特点及元素迁移特征。结果表明:高场强元素质量基本守恒;轻稀土元素较重稀土元素迁移量较大,但总体上稀土元素的迁移程度较弱;主要的成矿元素Cu、Pb、Zn为带入元素。东窝东矿床含矿斑岩侵位时代和热液蚀变时限均与多龙矿集区内多不杂、波龙、铁格隆南等多个超大型-大型铜金矿床一致,说明东窝东矿床和多龙矿集区内的多个矿床受控于同一构造-岩浆成矿背景,东窝东矿区具有重要的找矿潜力。

关键词：绢云母 40Ar-39Ar年代学元素迁移东窝东矿床西藏

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简述数学方法论与数学文化的作用

潍坊学院学报 2016年第6期16卷 63-66页

作者：张玉峰冯滨鲁张祥芝董焕河中国矿业大学江苏徐州221116 潍坊学院山东潍坊261061 山东科技大学山东青岛266590

数学方法论是数学文化的一部分,其内容是目前开展的数学文化课程建设的重要核心组成部分。因此,建议在今后的数学文化课程建设中以数学方法论理论为目标,选取适当内容并结合具体数学知识,培养学生的科学和人文素质。本文还指出了数学方... 详细信息

数学方法论是数学文化的一部分,其内容是目前开展的数学文化课程建设的重要核心组成部分。因此,建议在今后的数学文化课程建设中以数学方法论理论为目标,选取适当内容并结合具体数学知识,培养学生的科学和人文素质。本文还指出了数学方法论尚未在高校普及的原因以及数学方法论在数学创新方面的辅助指导作用。

关键词：数学文化数学方法论 MM教学法

Application research of compressed-air energy storage under high proportion of renewable energy

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Clean Energy 2022年第2期6卷 305-312页

作者： bin feng Bo yu State Grid Ningxia Electric Power Co.ltd YinchuanNingxiaChina State Grid Ningxia Economic and Technological Research Institute YinchuanNingxiaChina

China will strive to achieve a‘dual carbon’target:‘carbon peak’by 2030 and‘carbon-neutral’by *** this context,improving the efficiency of renewable energy and reducing the use of thermal power are important ways to achieve the ***,efficient and large-capacity energy-storage technology is the key to improving the utilization rate of renewable ***,this paper proposes to use compressed-air energy-storage technology instead of the old energy-storage technology to build an economical and environmentally friendly comprehensive energy park capacity optimization configuration ***,this paper uses the newly proposed improved chicken swarm optimization algorithm to solve the model,which is more accurate and ***,this paper analyzes a comprehensive energy park in north-west *** case analysis,it can be seen that the average utilization rate of renewable energy can reach 73.87%through the model proposed in this paper,while the average power-abandonment rate is only 9.32%.

关键词： renewable energy compressed-air energy storage power-abandonment rate chicken swarm optimization

Orientation Field Code Hashing:A Novel Method for Fast Palmprint Identification

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IEEE/CAA Journal of Automatica Sinica 2021年第5期8卷 1038-1051页

作者： Xi Chen Ming yu feng yue bin Li the School of Electronic and Information Engineering Hebei University of Technology(HEBUT)Tianjin 300401 Beijing Institute of New Technology Applications Beijing Academy of Sciences and TechnologyBeijing 100035China the School of Articial Intelligence Hebei University of Technology(HEBUT)Beijing 100035China

For a large-scale palmprint identification system,it is necessary to speed up the identification process to reduce the response time and also to have a high rate of identification *** this paper,we propose a novel hashing-based technique called orientation field code hashing for fast palmprint *** investigating hashing-based algorithms,we first propose a double-orientation encoding method to eliminate the instability of orientation codes and make the orientation codes more ***,we propose a window-based feature measurement for rapid searching of the *** explore the influence of parameters related to hashing-based palmprint *** have carried out a number of experiments on the Hong Kong Poly U large-scale database and the CASIA palmprint database plus a synthetic *** results show that on the Hong Kong Poly U large-scale database,the proposed method is about 1.5 times faster than the state-of-the-art ones,while achieves the comparable identification *** the CASIA database plus the synthetic database,the proposed method also achieves a better performance on identification speed.

关键词： Biometric system hashing orientation feature palmprint identification

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磁控溅射镍膜及其性能的研究

绝缘材料 2008年第2期41卷 57-59,63页

作者：余凤斌夏祥华于子龙耿秋菊山东天诺光电材料有限公司济南250101 西北工业大学材料学院西安710072

采用磁控溅射法在聚对苯二甲酸乙二醇酯(PET)基材上制备了镍薄膜。用扫描电子显微镜(SEM)分析溅射功率、溅射真空室气压等工艺参数对镍薄膜表面形貌的影响;研究了溅射工艺参数与薄膜性能之间的关系。实验结果表明,在室温下,随着溅射气... 详细信息

采用磁控溅射法在聚对苯二甲酸乙二醇酯(PET)基材上制备了镍薄膜。用扫描电子显微镜(SEM)分析溅射功率、溅射真空室气压等工艺参数对镍薄膜表面形貌的影响;研究了溅射工艺参数与薄膜性能之间的关系。实验结果表明,在室温下,随着溅射气压的增加,沉积速率和粒径都是先增加后又逐渐变小,而薄膜的电阻则随着压强的增大先减小后逐步增大;薄膜的表面粗糙度随着溅射功率的增加而增大;膜层与基材的剥离强度较大且均匀,膜层结合较为牢固,薄膜的耐摩擦性能较为优良。

关键词：磁控溅射薄膜 Ni

Representations of Four-Derivation Lie Algebras of Block Type

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Acta Mathematica Sinica,English Series 2010年第1期26卷 49-76页

作者： yu feng ZHAO Zhi bin LIANG LAMA School of Mathematical Sciences Peking University Beijing 100871 P. R. China School of Mathematical Sciences Capital Normal University Beijing 100048 P. R. China

Block introduced certain analogues of the Zassenhaus algebras over a field of characteristic 0. The nongraded infinite-dimensional simple Lie algebras of Block type constructed by Xu can be viewed as generalizations of the Block algebras. In this paper, we construct a family of irreducible modules in terms of multiplication and differentiation operators on ＂polynomials＂ for four-devivation nongraded Lie algebras of Block type based on the finite-dimensional irreducible weight modules with multiplicity one of general linear Lie algebras. We also find a new series of submodules from which some irreducible quotient modules are obtained.

关键词： irreducible modules nongraded Lie algebras nongraded Lie algebras of Block type

Permutation orbifolds of vertex operator superalgebras and associative algebras

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Science China Mathematics 2025年第1期 19-38页

作者： Chongying Dong feng Xu Nina yu Department of Mathematics University of California at Santa Cruz Department of Mathematics Huzhou University Department of Mathematics University of California at Riverside School of Mathematical Sciences Xiamen University

Let V be a vertex operator superalgebra and g =（1 2 ···k） be a k-cycle which is viewed as an automorphism of the tensor product vertex operator superalgebra V■*** this paper,we construct an explicit isomorphism from Ag(V■k) to A（V） if k is odd and to Aσ（V） if k is even where σ is the canonical automorphism of V of order 2 determined by the superspace structure of *** recover previous results by Barron（2016）and Barron and Vander Werf（2014） that there is a one-to-one correspondence between irreducible g-twisted V■k-modules and irreducible V-modules（*** σ-twisted V-modules） when k is odd（***）.This explicit isomorphism is expected to be useful in our further study on the Zhu algebra of the fixed point subalgebra.

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