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浮选尾矿回收金实践

黄金 2007年第4期28卷 47-48页

作者：杨成森辽宁五龙金矿

从堆存的浮选尾矿中回收金,即充分利用了矿产资源,又解决了今后生产尾矿场地问题,取得了巨大的经济效益和社会效益。

关键词：尾矿金氰化回收

High-frequency enhanced response based on Sb_(2)Te_(3)topological insulators

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Photonics Research 2022年第10期10卷 2302-2308页

作者： SHI ZHANG CHAOFAN SHI WEIWEI TANG LIBO ZHANG LI HAN chengsen yang ZHENGyang ZHANG JIAN WANG MIAO CAI GUANHAI LI CHANGLONG LIU LIN WANG XIAOSHUANG CHEN WEI LU College of Physics and Optoelectronic Engineering Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China Department of Optoelectronic Science and Engineering Donghua UniversityShanghai 201620China Terahertz Technology Innovation Research Institute Shanghai Key Laboratory of Modern Optical SystemUniversity of Shanghai for Science and TechnologyShanghai 200093China

Topological insulators represent a new quantum phase of matter with spin-polarized surface states that are protected from backscattering, exhibiting electronic responses to light, such as topological quantum phase transitions. However, the effects of high-frequency driving topological intrinsic systems have remained largely unexplored challenges experimentally for high-sensitivity terahertz detection. In this study, by integrating Sb2Te3 topological insulators with subwavelength metal antennas through micro-nano processing, a high-frequency terahertz detector with high sensitivity is proposed. The enhanced response originates from the asymmetric scattering of the surface electrons in the Sb_(2)Te_(3) flakes induced by the terahertz wave. The device displays room-temperature photodetection with a responsivity of 192 mA/W and equivalent noise power of less than 0.35 nW/Hz^(1/2) in the frequency range from 0.02 to 0.3 THz. These results pave the way for the exploitation of topological insulators for high-frequency operation in real-time imaging within long-wavelength optoelectronics.

关键词： scattering insulator quantum

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五龙金矿尾矿库增容使用的实践

黄金 2006年第11期27卷 50-52页

作者：杨成森刘立新辽宁五龙金矿

五龙金矿尾矿库增容对企业生产有着重大意义,缓解了尾矿堆放新场地选址的问题,减少了环境污染,对环境保护具有积极作用,也是采用细粒尾矿筑坝的成功范例。

关键词：尾矿库加高增容增效

儿童复杂性先天性心脏病超声心动图与多层螺旋CT检查及应用的临床效果观察

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黑龙江医学 2024年第9期48卷 1089-1091页

作者：杨成森刘静乔雅馨开封市中心医院医学影像科河南开封475000 开封市中医院超声科河南开封475000 河南省洛阳正骨医院功能检查科河南郑州450016

目的:观察儿童复杂性先天性心脏病超声心动图与多层螺旋CT检查及应用的临床效果。方法:回顾性分析开封市中心医院2011年1月-2022年1月收治的50例患有复杂性先天性心脏病儿童的临床资料。所有患儿入院时均进行超声心动图与多层螺旋CT检查... 详细信息

目的:观察儿童复杂性先天性心脏病超声心动图与多层螺旋CT检查及应用的临床效果。方法:回顾性分析开封市中心医院2011年1月-2022年1月收治的50例患有复杂性先天性心脏病儿童的临床资料。所有患儿入院时均进行超声心动图与多层螺旋CT检查,以手术病理为金标准,分析两种检查方式对复杂性先天性心脏病的诊断效果。结果:50名患儿中,共发现178种心脏畸形,包括71种心内畸形及107种心外畸形。多层螺旋CT对心外畸形的检出率为98.13%,高于超声心动图的84.11%,差异有统计学意义(χ^(2)=11.321,P0.05)。结论:多层螺旋CT和超声心动图对复杂性先天性心脏病的阳性检出率较高,但多层螺旋CT在诊断心外畸形方面优于超声心动图。

关键词：儿童复杂性先天性心脏病超声心动图多层螺旋CT检查临床效果

64排螺旋CT增强扫描对胃癌术前TNM分期中的临床价值

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现代医用影像学 2012年第3期21卷 135-137页

作者：李立钱伟军武森杨成森赵利芳河南省开封市第一人民医院影像科CT室 475000

目的:探讨64排螺旋CT增强扫描在进展期胃癌的诊断、分期及可切除性及根治范围判定价值。材料与方法:对45例临床确诊为胃癌的住院患者进行术前64排螺旋CT动态增强扫描,根据结果作出分期诊断,并与手术及病理TNM分期相对照。结果:CT表现为... 详细信息

目的:探讨64排螺旋CT增强扫描在进展期胃癌的诊断、分期及可切除性及根治范围判定价值。材料与方法:对45例临床确诊为胃癌的住院患者进行术前64排螺旋CT动态增强扫描,根据结果作出分期诊断,并与手术及病理TNM分期相对照。结果:CT表现为胃壁多层结构破坏,淋巴结及邻近、远处脏器的转移。螺旋CT的T、N及M分期准确率分别为71.1%、75.0%和71.4%。结论:64排螺旋CT增强扫描术前评估进展期胃癌TNM分期准确性高,对胃癌患者术前评估有较高的临床参考价值。

关键词： 64排螺旋CT TMN分期

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内蒙古某金矿选矿工艺流程考查及优化

黄金 2021年第2期42卷 76-80,86页

作者：杨振兴张国刚杨成森逄文好陈玉喜祝保军中金黄金股份有限公司长春黄金研究院有限公司内蒙古金陶股份有限公司

内蒙古某金矿选矿工艺为尼尔森(摇床)重选+浮选工艺流程,其中重选回收金的效果不理想。为探究其原因及解决方法,对磨矿分级系统、重选系统进行了工艺流程考查。结果表明:球磨机和泵池中存在一定的积金是影响尼尔森重选回收率的主要因素... 详细信息

内蒙古某金矿选矿工艺为尼尔森(摇床)重选+浮选工艺流程,其中重选回收金的效果不理想。为探究其原因及解决方法,对磨矿分级系统、重选系统进行了工艺流程考查。结果表明:球磨机和泵池中存在一定的积金是影响尼尔森重选回收率的主要因素,尼尔森选矿机稳定运行时间短也会影响金的回收效果;磨矿分级系统存在球磨机钢球充填率低及磨矿效率较低等问题;针对流程考查中发现的问题提出了优化建议,为下一步提高重选回收率及改进磨矿分级系统提供了依据。

关键词：金矿磨矿分级重选尼尔森选矿机流程考查

Total Synthesis of UCS1025A via Tandem Carbonylative Stille Cross Coupling and Diels-Alder Reactiont

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Chinese Journal of Chemistry 2023年第22期41卷 3019-3024页

作者： chengsen Cui Mingi Dai Deparment of Chemistry and Center for Cancer Research Purdue University West Lfaytte IN 47907United States Department of Chemistry Emory UniversityAtlantaGA 30322United States

We report an efficient and convergent strategy for the total synthesis of UCS1025A and its diastereomer ***1025A is a representative member of the naturally occurring pyrrolizidinone polyketides,from which members with potent antibacterial,antifungal,and anticancer activities have been *** approach features a tandem carbonylative Stille cross coupling and Diels-Alder reaction to forge a key C-C bond and build the trans-decalin *** tandem process utilizes carbon monoxide as a one-carbon linchpin to stitch a vinyl triflate and a vinylstannane together and form the desired enone moiety for the subsequent intramolecular Diels-Alder *** synthesis also provides a versatile approach for the synthesis of other related pyrrolizidinone-containing polyketides.

关键词： Natural products Total synthesis UCS1025A Carbonylation Diels-Alder reaction Tandem reaction

X线、多层螺旋CT和MR对脊椎骨折的影像诊断对比研究

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中国医学工程 2023年第2期31卷 6-9页

作者：张超鑫李立陈伟杨成森于博鄂正康钱伟军开封市中心医院医学影像科河南开封475000 开封市中心医院骨科河南开封475000 河南省洛阳正骨医院(河南省骨科医院)郑州院区放射科河南郑州450016 新乡医学院附属开封市中心医院医学影像科河南开封475000

目的分析并比较X线、多层螺旋CT和MR检查对脊椎骨折的影像诊断。方法选取开封市中心医院2016年12月到2020年12月收治的100例脊柱骨折患者作为实验研究对象,分析并比较X线、多层螺旋CT和MR对脊椎骨折的影像诊断。结果从准确率来看,多层螺... 详细信息

目的分析并比较X线、多层螺旋CT和MR检查对脊椎骨折的影像诊断。方法选取开封市中心医院2016年12月到2020年12月收治的100例脊柱骨折患者作为实验研究对象,分析并比较X线、多层螺旋CT和MR对脊椎骨折的影像诊断。结果从准确率来看,多层螺旋CT与MR要高于X线;从检出率来看,MR最高;从检出时间来看,MR最长,其次是多层螺旋CT,最后为X线。从总体层面看,差异有统计学意义(P<0.05)。结论X线、多层螺旋CT和MR都具有自身的诊断价值,如果要考虑检出率和准确率的话,MR效果更佳,可快速诊断出患者损伤部位,并提供相关的诊断方法。

关键词： X线多层螺旋CT MR 脊椎骨折影像诊断对比

A Review on the Taxonomic,Evolutionary and Phytogeographic Studies of the Lotus Plant(Nelumbonaceae:Nelumbo)

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Acta Geologica Sinica(English Edition) 2014年第4期88卷 1252-1261页

作者： LI Ya Popova SVETLANA YAO Jianxin LI chengsen Institute of Geology Chinese Academy of Geological Sciences Key Laboratory of Stratigraphy and Paleontology Ministry of Land and Resources of the People's Republic of China State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of Sciences Laboratory of Palaeobotany Komarov Botanical InstituteRussian Academy of Sciences

Nelumbo Adans. （Nelumbonaceae） is an important member of the early-diverging eudicots. It contains two extant species： N. nucifera Gaertn. （the Sacred lotus）, distributed in Asia and Australia and N. lutea Willd. （the American lotus）, occurring in North America. This paper reviews the taxonomic, evolutionary and phytogeographic studies of the genus Nelumbo, and also raises scientific questions about it in further paleobotanic research. There are about 30 fossil species of Nelumbo established since the Early Cretaceous. Based on fossil studies, the ancestors of the extant N. nucifera and N. lutea are respectively considered to be N. protospeciosa from the Eocene to Miocene of Eurasia, and N. protolutea from the Eocene of North American. However, molecular systematic studies indicate that N. nucifera and N. lutea are probably split from a common ancestor during the Late Miocene to Early Pliocene, or even the Pleistocene, rather than separate relicts from extinct species on different continents. The characters of lotus stomatal development, seedling morphology as well as its flowering, pollination and fertilization in air reveal that it evolves from the land plants. Fossil data of Nelumbo indicates that the genus first occurs in mid-latitude area of Laurasia in the Early Cretaceous, then becomes widespread in North America and Eurasia and expands into Africa and South America during the Late Cretaceous; the genus probably colonizes the Indian Subcontinent from Asia during the Early Eocene after the collision of India and the Asian plates; the genus becomes extinct in Europe, but survives in Asia and North America during the Quaternary Ice Age, and later forms the present East Asia and North Australia-North America disjunctive distribution.

关键词： taxonomy evolution phytogeography Nelumbo Nelumbonaceae