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The Crossing Number of Two-Maps on Orientable Surfaces

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Journal of Mathematical Research and Exposition 2011年第4期31卷 643-648页

作者： yong xiang wu Hart REN Tu XU Department of Mathematics Education Resource Center Ningbo Polytechnic Zhejiang 315800 P. R. China Department of Mathematics East China Normal University Shanghai 200062 P. R. China

In this paper, we discuss the crossing numbers of two one-vertex maps on orientable surfaces. By using a reductive method, we give the crossing number of two one-vertex maps with one face on an orientable surface and the crossing number of a one-vertex map with one face and a one-vertex map with two faces on an orientable surface. This provides a lower bound for the crossing number of two general maps on an orientable surface.

关键词： crossing number embedding orientable surface.

Depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 335-345页

作者： Feng Zhang Chenyang Zhang Linlin wu Wei Sun Hongliang Zhang Jianhua Chen yong Pei Songjiang Li Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization Hunan International Joint Research Center for Efficient and Clean Utilization of Critical Metal Mineral ResourcesSchool of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China State Key Laboratory of Mineral Processing Beijing General Research Institute of Mining&MetallurgyBeijing 100160China Hunan Provincial Key Laboratory of Micro&Nano Materials Interfaces Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Department of Chemistry Xiangtan UniversityXiangtan 411105China China Railway Resource Group Co.Ltd Beijing 102300China

The depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite still lacked in-depth ***,the depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite was further systematically investigated with experiments and density functional theory(DFT)*** X-ray photoelectric spectroscopy(XPS)results,DFT calculation results,and frontier molecular orbital analysis indicated that sulfite ions were difficult to be adsorbed on sphalerite surface,suggesting that sulfite ions achieved depression effects on sphalerite through other non-adsorption ***,the oxygen content in the surface of sphalerite treated with sulfite ions in creased,which enhanced the hydrophilicity of the sphalerite and further increased the difference in hydrophilicity between sphalerite and ***,sulfite ions were chelated with lead ions to form PbSO_(3)in *** hydrophilic PbSO_(3)was more easily adsorbed on sphalerite than *** interaction between sulfite ions and lead ions could effectively inhibit the activation of *** addition the UV spectrum showed that after adding sulfite ions,the peak of perxanthate in the sphalerite treated xanthate solution was significantly stronger than that in the galena with xanthate solution,indicating that xanthate interacted more readily with sulfite ions and oxygen mo lecules within the sphalerite system,leading to the formation of ***,sulfite ions hardly depressed the flotation of ga lena and could promote the flotation of galena to some *** study deepened the understanding of the depression mechanism o sulfite ions on sphalerite and Pb^(2+)activated sphalerite.

关键词： sphalerite galena sulfite ion density functional theory depression mechanism

不同类型政府和企业对产业共性技术研发的投资策略研究

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研究与发展管理 2017年第3期29卷 98-109页

作者：周潇盛永祥吴洁施琴芬江苏科技大学经济管理学院镇江212003 苏州科技大学科研产业部苏州215009

产业共性技术研发符合供给侧改革对调结构、促转型的目标要求,但企业在共性技术研发中面临组织和市场的"双重失灵".鉴于此,构建了政府和企业对产业共性技术研发的投资博弈模型,根据模型纳什均衡解的不同情况,分别研究了中央和地方两种... 详细信息

产业共性技术研发符合供给侧改革对调结构、促转型的目标要求,但企业在共性技术研发中面临组织和市场的"双重失灵".鉴于此,构建了政府和企业对产业共性技术研发的投资博弈模型,根据模型纳什均衡解的不同情况,分别研究了中央和地方两种类型政府资助龙头企业或一般企业时二者的最优投资策略组合,并通过案例分析获取了模型变量的经济数据和模型参数的回归值,证明了模型的可操作性.研究结果显示,中央和地方政府在产业共性技术研发供给体系中角色不同,中央政府发挥主导作用,地方政府扮演跟随者和补充投资者的角色.研究成果为政府根据资助企业特点采取权变的投资策略、企业根据政府特点采取合理的项目申报和投资策略提供了理论依据.

关键词：产业共性技术研发投资策略博弈模型生产函数

Crystallization Modulation and Holistic Passivation Enables Efficient Two‑Terminal Perovskite/CuIn(Ga)Se_(2)Tandem Solar Cells

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Nano-Micro Letters 2025年第1期17卷 205-215页

作者： Cong Geng Kuanxiang Zhang Changhua Wang Chung Hsien wu Jiwen Jiang Fei Long Liyuan Han Qifeng Han Yi‑Bing Cheng yong Peng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Triumph Photovoltaic Materials Co. Ltd.No.1001 Yannan AvenueHigh‑Tech Development DistrictBengbuAnhui 233000People’s Republic of China College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004People’s Republic of China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Two-terminal(2-T)perovskite(PVK)/CuIn(Ga)Se_(2)(CIGS)tandem solar cells(TSCs)have been considered as an ideal tandem cell because of their best bandgap matching regarding to Shockley–Queisser(S–Q)***,the nature of the irregular rough morphology of commercial CIGS prevents people from improving tandem device *** this paper,D-homoserine lactone hydrochloride is proven to improve coverage of PVK materials on irregular rough CIGS surfaces and also passivate bulk defects by modulating the growth of PVK *** addition,the minority carriers near the PVK/C60 interface and the incompletely passivated trap states caused interface recombination.A surface reconstruction with 2-thiopheneethylammonium iodide and N,N-dimethylformamide assisted passivates the defect sites located at the surface and grain ***,LiF is used to create this field effect,repelling hole carriers away from the PVK and C60 interface and thus reducing *** a result,a 2-T PVK/CIGS tandem yielded a power conversion efficiency of 24.6%(0.16 cm^(2)),one of the highest results for 2-T PVK/CIGS TSCs to our *** validation underscores the potential of our methodology in achieving superior performance in PVK/CIGS tandem solar cells.

关键词： PVK/CIGS TSCs Irregular rough surfaces Modulating the growth PVK/C60 interface recombination

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绿色发展的国际先进经验及其对中国的启示

新疆师范大学学报（哲学社会科学版） 2017年第2期38卷 18-24页

作者：杨宜勇吴香雪杨泽坤国家发改委宏观经济研究院社会发展研究所北京100038 中国人民大学公共管理学院北京100872 德国不来梅雅各布大学汉堡28759

随着经济的不断发展,经济增长与资源环境之间的张力越来越大,给中国经济社会的可持续发展带来沉重压力。中共十八届五中全会提出"五大发展理念",将绿色发展提高到突出位置,强调走绿色发展之路,以实现经济社会发展与资源环境的共生共荣... 详细信息

随着经济的不断发展,经济增长与资源环境之间的张力越来越大,给中国经济社会的可持续发展带来沉重压力。中共十八届五中全会提出"五大发展理念",将绿色发展提高到突出位置,强调走绿色发展之路,以实现经济社会发展与资源环境的共生共荣。国外发达国家已有成功的绿色发展经验,值得合理借鉴。走绿色发展之路要立法先行,严格监管,综合利用各种绿色发展的政策工具,统筹绿色发展规划与重点治理相结合,强化企业的作用,不断创新绿色发展技术,要求社会公众积极参与,并加强环境教育,提高全社会环境保护的意识。

关键词：绿色发展国际经验绿色经济生态文明

The design and synthesis of Tetrandrine derivatives

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The design and synthesis of Tetrandrine derivatives

The design and synthesis of 8-oxocoptisine derivatives

2011年全国药物化学学术会议——药物的源头创新

作者： yong wu~*,xiang-juan Cui,Li Hai,Yun He Key laboratory of Drug Targeting and Drug Delivery System of Education Ministry,West China School of Pharmacy,Sichuan University,Chengdu,610041,China

＜正＞A broad-spectrum resistance to structurally and mechanistically diverse antitumor agents is known as multidrug-resistance（MDR）.MDR is often associated with overexpression of both multidrug-resistanceassociated... 详细信息

关键词： Tetrandrine derivatives multidrug-resistance anticancer drugs synthesis

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The design and synthesis of 8-oxocoptisine derivatives

The synthesis of Dauriporphine

2011年全国药物化学学术会议——药物的源头创新

作者： yong wu~*,xiang-juan Cui,Li Hai,Yun He,Yi He Key laboratory of Drug Targeting and Drug Delivery System of Education Ministry,West China School of Pharmacy,Sichuan University,Chengdu,610041,China

A major problem in cancer chemotherapy is multidrug resistance(MDR) which is caused principally by the increased efflux of drugs from malignant cells due to increased expression of P-glycoprotein.A number of structurally divergent drugs used in treating a variety of pathological conditions possess MDR-reversing properties such as verapamil.8-Oxocoptisine is isolated from

关键词： 8-oxocoptisine derivatives multidrug-resistance P-glycoprotein synthesis

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The synthesis of Dauriporphine

Oxygen vacancies enriched Ir/WOx catalysts for the directly chem-catalytic conversion of cellulose to ethanol

2011年全国药物化学学术会议——药物的源头创新

作者： yong wu~*,xiang-juan Cui,Li Hai,Yun He,Bo Zhou Key laboratory of Drug Targeting and Drug Delivery System of Education Ministry,West China School of Pharmacy,Sichuan University,Chengdu,610041,China

＜正＞Resistance of tumors to multiple structurally unrelated anticancer drugs is one of the major obstacles to successful cancer *** to achieve complete and long-lasting responses is a common clinical problem that li... 详细信息

关键词： Dauriporphine multidrug-resistance anticancer drugs synthesis

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Tungsten 2025年第1期7卷 88-99页

作者： Yu-Jing Weng Zhao-Ying Ding Ying-Chao Li Yuan-Feng wu Yuan-Yang Xu Rui Chen Xiao-Lei Zhao Hai-yong Wang Da-Lei Zhang Yu-Long Zhang Henan Key Laboratory of Coal Green Conversion and International Joint Laboratory of Coal Clean Utilization College of Chemistry and Chemical Engineering Henan Polytechnic University Key Laboratory of Renewable Energy Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Liaoning Institute of Energy Technology

Tungsten and its oxides are highly versatile catalysts with unique properties that hold great promise for a wide array of applications,including biological pathways and chemical *** chemo-catalysis of cellulose to ethanol presents a promising avenue for ethanol synthesis with the potential for enhanced efficiency compared to conventional methods,offering a sustainable and carbon-neutral alternative to existing petrochemical and biological ***,Ir/WOxcatalysts enriched with oxygen vacancies were meticulously prepared and demonstrated remarkable catalytic performance in converting cellulose to ethanol directly in the presence of tungstic *** catalyst achieved a high ethanol yield of 66.5%under optimal reaction conditions,approaching the theoretical yield limit of traditional ethanol *** results revealed the presence of oxygen defects,Bronsted/Lewis acidity,and Ir nanoclusters on the catalyst surface,working synergistically to facilitate the cascade catalysis of cellulose hydrolysis,sugar retro-aldol condensation reaction,and C2 intermediate hydrodeoxygenation to *** situ Fourier transform infrared spectrometer analysis confirmed the catalyst's ability to enhance the adsorption and activation of ethylene glycol for ethanol *** manipulating subtle structural features,this study offers a fresh perspective on tungsten group catalyst design and underscores the importance of synergistic effects among catalytic sites for the efficient production of ethanol from cellulose.

关键词： Cellulosic ethanol Chem-catalysis Hydrogenolysis Retro-aldol condensation Tungsten