Study on Innovation of Cost Management in Modern Mine Enterprise

瞬息万变和竞争日益激烈的经济环境对矿山企业成本管理提出了新的要求，矿山企业为了应对环境的变化，进行成本管理创新迫在眉睫。本文以现代矿山企业作为研究对象，利用和借鉴先进成本管理理论和方法在其他行业的应用成果，研究现代矿山企业成本管理整体创新体系，旨在完善现代成本管理的行业应用理论和方法，并指导现代矿山企业成本管理的实践。 本文采用系统观、集成观作为理论研究的基本指导思想，利用战略管理、供应链管理、作业管理、业务流程再造、信息集成等基本原理，采用层次分析法、灰色预测、人工神经网络等具体方法，对现代矿山企业成本管理进行了整体创新研究。文章以现代成本管理的先进理论与方法为借鉴，针对现代矿山企业业务流...Rapidly changing and increasingly competitive economic environment creates new demands for the cost management in the excavating industry. In response to the changes in the economic environment, cost management innovation becomes an urgent task. Consequently, the object of this article is to apply advanced theories and methods of cost management in other industries to study the integrated innovati...学位：博士后院系专业：管理学院会计系_会计学学号：BH1700002

BOM Quantity Model of Artificial Neural Network Based on ERP in Coal Mining Enterprises

根据煤炭企业影响物料消耗因素的特点,进行了煤炭企业BOM神经网络模型的选择及算法改进,并以乳化油为例进行实证研究,得出了相应结论。According to the characteristics and the influence factors of materials consumption in coal industry,the author chooses a BP artificial neural network model and improves its algorithm for coal industry BOM.It takes Emulsible Oil as an example and draws a corresponding conclusion

Research on Cost Coordination Management of Enterprise Cluster Based on Value-chain

提出了企业集群基于价值链的成本协同管理概念,构建了企业集群基于价值链的成本协同管理框架;基于此框架详细地分析了企业集群基于价值链的成本协同层次,提出了成本协同控制模式,最后规划了成本协同组织问题。In this paper, the definition of cost coordination management of enterprise cluster based on value-chain is presented, and the systematic frame of which is constructed. Based on this frame, cost coordination levels based on value chain are analyzed, the model of cost coordination control based on value chain are discussed, and the cost coordination organization based on value chain is designed in enterprise cluster.国家社会科学基金项目(05BJY014

Electronic States and Spectroscopic Properties of RuH_2 and RuN_2

[中文文摘]用量子化学从头算方法在B3LYP/6 311G 的水平上 ,研究了RuH2 和RuN2 可能的电子组态和光谱性质 .结果表明 ,RuH2 的3 B2 和5Σ-态对应于静电作用的物理吸附态 .RuN2 的一重态和三重态的计算结果跟钌单晶面上的实验值相接近 .而RuN2 在C∞v对称性时 ,五重态5Σ-的计算频率比实验值稍低 .在C2v对称性时 ,五重态的计算频率值则更低 ,3 B2 和5A1态不能稳定存在.[英文文摘]Using DFT method at B3LYP/6-311G ** level, the possible electronic states of RuH 2 and RuN 2 have been calculated, including the chemical adsorption and physical adsorption. For the RuH 2 cluster, electronic states 3B 2 and 5Σ - correspond to the physical adsorption. The RuN 2 calculation results were also compared with the experimental values on ruthenium single crystal surfaces. It is found that the single states and the triplet states are in good agreement with the experimental values. For the C∞v symmet ry , the calculated frequency of the quintuple state 5Σ- is slightly lower than the experimental value. For the C2v symmet ry , the f requencies of the quintuple states are much lower than the experiment value and the 3B2 and 5A1 states are unstable.Project supported by the the NSF of China (20273053,29933040 and 20023001)andthe 973 project of the DST of China(001CB108906)

戊型肝炎病毒颗粒性蛋白疫苗H-2~d限制性Th表位的筛选

戊型肝炎病毒衣壳蛋白重组抗原HEV 239能形成类病毒颗粒,具备演变成多价疫苗的载体的潜力,此文旨在筛选、鉴定其内包含的H-2d限制性Th表位。以50μg HEV 239蛋白与完全弗式佐剂混合后皮下免疫BALB/c鼠,以覆盖HEV 239蛋白全长的15氨基酸肽库体外刺激其脾细胞,用IFN--γELISPOT方法检测其细胞免疫应答,并通过磁珠剔除脾细胞中CD4+T细胞或CD8+T细胞以分析筛选得到的T细胞表位的特性。结果显示:HEV 239中包含优势的T细胞表位P34(HEV PORF2 AA533~AA547,HSKTF FVLPL RGKLS)及数个较弱的T细胞表位,P34对HEV 239免疫的BALB/c鼠脾细胞的刺激效果与HEV 239蛋白相当,剔除实验表明该表位为CD4+T细胞表位,即Th表位

厦门大学“化学学科拔尖学生培养试验计划”学生科研能力培养的探索与思考

介绍了厦门大学化学拔尖学生培养试验计划学生科研训练开展情况,并结合问卷调查,通过数据对比分析,探索如何培养高层次创新人才的科研兴趣、素养和能力。教育部“厦门大学化学学科拔尖学生培养试验计划学生科研能力培养探索

Constraint of a ruthenium-carbon triple bond to a five-membered ring

含过渡金属碳三键(M≡C)的金属卡拜化合物是许多有机反应的催化剂或关键中间体。对其合成及性质的研究是金属有机化学的热点之一。由于卡拜碳的sp杂化方式，大部分金属卡拜化合物均为链状结构（卡拜碳键角理想值为180 °），环内金属卡拜化合物因存在很大的环张力而难于合成。夏海平教授课题组发展了由链状多炔（称之为碳龙）构筑碳龙配合物的高效方法（Nature Communications, 2017, 8, 1912），实现了锇杂戊搭炔/烯及其衍生物的一锅法合成。现在，他们把该方法进一步拓展到了第二过渡系金属钌，通过碳龙与市售的RuCl2(PPh3)3反应一锅合成了钌杂戊搭炔I。本研究是碳龙化学的进一步延伸和发展，首次把碳龙化学的金属中心由锇拓展到了其它金属，展示了碳龙化学广阔的发展空间。该研究工作在夏海平教授指导下完成，能源材料化学协同创新中心（iChEM）博士后卓庆德和张弘副教授为共同第一作者。iChEM博士后周小茜、博士生陈志昕、林剑锋、卓凯玥、硕士康慧君、林鑫磊参与了部分实验工作。博士生华煜晖负责理论计算。【Abstract】The incorporation of a metal-carbon triple bond into a ring system is challenging because of the linear nature of triple bonds. To date, the synthesis of these complexes has been limited to those containing third-row transition metal centers, namely, osmium and rhenium. We report the synthesis and full characterization of the first cyclic metal carbyne complex with a second-row transition metal center, ruthenapentalyne. It shows a bond angle of 130.2(3)° around the sp-hybridized carbyne carbon, which represents the recorded smallest angle of second-row transition metal carbyne complexes, as it deviates nearly 50° from the original angle (180°). Density functional theory calculations suggest that the inherent aromatic nature of these metallacycles with bent Ru≡C–C moieties enhances their stability. Reactivity studies showed striking observations, such as ambiphilic reactivity, a metal-carbon triple bond shift, and a [2 + 2] cycloaddition reaction with alkyne and cascade cyclization reactions with ambident nucleophiles.This research was supported by the National Key R&D Program of China (2017YFA0204902) and the National Natural Science Foundation of China (nos. 21490573,21332002, and 21561162001). 研究工作得到国家自然科学基金项目（21490573、21332002 和21561162001）和国家重点研发计划（2017YFA0204902）的资助

Successive modification of polydentate complexes gives access to planar carbon-and nitrogen-based ligands

以碳和氮为键合原子的多齿螯合物是配合物家族中非常重要的一类。具有更高齿数的平面构型NC螯合物实例相对较少，代表性的例子为四齿金属碳卟啉类化合物，这类螯合物以其独特的结构和丰富的物理化学性质引起广泛关注。然而平面五齿、六齿的NC螯合物由于几何构型“拥挤”导致合成难度高，该工作从含三元环内金属卡宾结构的CCCC型碳龙配合物出发，利用经典有机反应（炔烃对金属卡宾的插入反应），成功地实现了CCCCN/NCCCN型平面五齿螯合物的合成。这一研究为高配位型螯合物的合成提供了新思路并为平面五齿螯合物家族添加新成员。特别是，这些高配位型螯合物在可见光和近红外区域均有较好的吸收，表现出良好的光声成像、光热转换及声动力学性能。 该研究工作在张弘教授指导下完成，第一作者为iChEM博士后周小茜。该工作充分体现了多学科协同研究优势：相关化合物的合成、表征及理论计算工作由周小茜博士完成；声动力学性能研究由厦门大学公共卫生学院庞鑫博士及刘刚教授完成；光声成像研究由厦门大学公共卫生学院聂立铭教授完成。iChEM fellow卓庆德博士、博士生卓凯玥、陈志昕参与了部分实验工作。夏海平教授、香港科技大学林振阳教授和南京大学朱从青教授对研究工作给予了大力支持。【Abstract】Polydentate complexes containing combinations of nitrogen and carbon (N and C) ligating atoms are among the most fundamental and ubiquitous molecules in coordination chemistry, yet the formation of such complexes with planar high-coordinate N/C sites remains challenging. Herein, we demonstrate an efficient route to access related complexes with tetradentate CCCN and pentadentate CCCCN and NCCCN cores by successive modification of the coordinating atoms in complexes with a CCCC core. Combined experimental and computational studies reveal that the rich reactivity of metal-carbon bonds and the inherent aromaticity of the metallacyclic skeletons play key roles in these transformations. This strategy addresses the paucity of synthetic approaches to mixed N/C planar pentadentate chelating species and provides valuable insights into the synthesis of carbon-based high-coordinate complexes. Furthermore, the resulting complexes are the examples of organometallic species with combined photoacoustic, photothermal, and sonodynamic properties, which makes them promising for application in related areas.This research was supported by the National Natural Science Foundation of China (Nos. 21572185, 21561162001, and 81571744), the Research Grants Council of Hong Kong (N_HKUST603/15), the Excellent Youth Foundation of Fujian Scientific Committee (2018J06024), and the Fundamental Research Funds for the Central Universities (20720170065).该工作得到国家自然科学基金委、香港研究资助局、福建省自然科学基金、厦门大学校长基金的资助

Planar Möbius aromatic pentalenes incorporating 16 and 18 valence electron osmiums

夏海平课题组长期致力于芳香体系的拓展研究。作为金属杂戊搭炔化学又一重要进展，在此研究中，他们发现金属杂戊搭炔的卡拜碳原子宛如“变色龙”，既具有亲核性，又具有亲电性。通过金属杂戊搭炔与亲电试剂反应揭示了其三键迁移的神秘面纱，并成功地捕捉了三键迁移的中间体——金属中心为16电子的金属杂戊搭烯；通过金属杂戊搭炔与亲核试剂反应，得到金属中心为18电子的金属杂戊搭烯。 　　朱军课题组通过理论计算，对金属杂戊搭烯进行深入理论研究。发现金属中心16电子、18电子金属杂戊搭烯均具有芳香性。深入的CMO-NICS计算表明，本质上，金属杂戊搭炔中Mobius芳香性来源于金属杂戊搭烯，正如苯炔的芳香性来源于苯。Mobius芳香性自1958年提出以来，实际合成的例子稀少，且前人已分离并报道的Möbius芳香体系均具有扭曲的拓扑结构。金属杂戊搭烯/炔代表着一类平面型的Möbius芳香性体系。从而颠覆了传统的芳香化学，为构筑其他平面型Möbius芳香体系奠定了基础。 　　该工作的合成和结构表征是在夏海平教授指导下由博士生朱从青（第一作者）、罗明和硕士生朱琴完成，我校温庭斌教授参与了产物结构表征的讨论。理论计算由朱军副教授完成，我校吕鑫教授、美国佐治亚大学P.v.R.Schleyer教授和J.I-C.Wu博士也参与了芳香性的讨论。Aromaticity, a highly stabilizing feature of molecules with delocalized electrons in closed circuits, is generally restricted to ‘Hückel’ systems with 4n+2 mobile electrons. Although the Möbius concept extends the principle of aromaticity to 4n mobile electron species, the rare known examples have complex, twisted topologies whose extension is unlikely. Here we report the realization of osmapentalenes, the first planar Möbius aromatic complexes with 16 and 18 valence electron transition metals. The Möbius aromaticity of these osmapentalenes, documented by X-ray structural, magnetic and theoretical analyses, demonstrates the basis of the aromaticity of the parent osmapentalynes. All these osmapentalenes are formed by both electrophilic and nucleophilic reactions of the in-plane π component of the same carbyne carbon, illustrating ambiphilic carbyne reactivity, which is seldom observed in transition metal chemistry. Our results widen the scope of Möbius aromaticity dramatically and open prospects for the generalization of planar Möbius aromatic chemistry.国家自然科学基金委、科技部和美国科学基金会的资