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Chinese Science Bulletin 2000年第7期45卷 659-664页

作者： darning li Wenji Chen Qi li China Seismol Bur Inst Geol Beijing 100029 Peoples R China

A binary mixing model for excess argon is suggested in the note. According to thismodel and the data of excess argon component obtained in our experiment, a quantitative study of the effect of excess argon on real K-Ar age of young volcanic rocks is done. The result indicates that the effect of 5% excess argon component in samples on K-Ar age of the samples more than 2 Ma is less than 7.36% and can lead K-Ar age of 0.5 Ma samples to increase by 32.4%, while 1% excess argon component leads K-Ar age of 0.5 Ma samples to increase by 6.26%. Therefore, when pre-processed excess argon component is ≤1%, K-Ar age of the samples more than 0.5 Ma should be credible. On this basis we suggest a principal opinion for evaluation of previous K-Ar dating results and propose that the matrix is used to determine K-Ar age of young volcanic rocks. For the samples less than 0.2 Ma, in the case of high excess argon content, even if only 1% excess argon component exists in their matrix, it can also greatly affect their K-A

关键词： young volcanic rock K-Ar age excess argon binary mixing model.

Quantitative,SEM-based shape analysis of sediment particles in the Yellow River

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International Journal of Sediment Research 2016年第4期31卷 341-350页

作者： darning li Yangyang li Zhichao Wang Xiao Wang Yanqing li State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University Civil Engineering The University of Adelaide

The shape of a sediment particle can reveal part of the particle’s transportation history and is a significant variable in sediment transport *** sediment shapes is a difficult and time-consuming task.A whole sample sediment particle shape quantitative analysis method(WSQAM) was applied in this research for sediment statistical *** shape parameter was found using sphericity and roundness descriptors:three samples were collected from the middle reach of the Yellow River at different *** electron microscopy(SEM) was used to obtain sediment particles *** sphericity and roundness descriptors were represented by the particle aspect ratio(AR) and the Fourier shape coefficient(FSC).The Fourier series approximation matched the particle *** the statistical results of the whole sediment particle sample,as counted by WSQAM based on digital image processing,fine sediment particles with smooth surfaces accounted for approximately 80%of all of the observed sediment *** the majority of sediment particles,AR was greater than 0.3 and FSC was less than *** AR was greater than 0.5,FSC exponentially decayed with *** AR was less than 0.5,the two parameters,AR and FSC,should be combined to describe the sediment particle *** combined use of these two parameters can provide a reference for future sediment-related *** sediment particle shape analysis model,programmed in Fortran,was rapid and *** proved efficient to use WSQAM for sediment statistical analysis,and the results were found to be accurate.

关键词： Hydraulics Sediment transport mechanics Sediment particle shape analysis SEM image Yellow River

Paleomagnetic data from Early Cretaceous volcanic rocks of West liaoning:Evidence for intracontinental rotation

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Chinese Science Bulletin 2002年第21期47卷 1832-1837页

作者： ZHU Rixiang SHAO Ji’an PAN Yongxin SHI Ruiping SHI Guanghai li darning Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100101China Department of Geology Peking UniversityBeijing 100871China Institute of Geology China Seismological BureauBeijing 100029China

Detailed rock magnetic studies of 55 lavas from Yixian and Fuxin area, West liaoning, show the primary carriers of remanence to be pseudo-single domain ti-tanomagnetite. K/Ar dating indicates that the volcanic sequence spans 93 to 133 Ma. Stepwise thermal demagnetization successfully isolated well-defined characteristic magnetization (ChRM) in all lavas thermal-treated above 250℃ The mean paleodirections are D/I=5.9°/58.8° (α95 = 2.9°) and D/I =179.2°/-59.9° (α95 = 5.2°) for 27 normally magnetized flows and 28 reversibly magnetized flows, respectively. It indicates that since the Early Cretaceous there is no significant horizontal movement and rotation between the Yixian-Fuxin area and Eurasia. However, Korea Peninsula may have undergone a clockwise rotation of 33.9° relative to the Yixian-Fuxin area during the Cretaceous. On the basis of characteristics of hotspot origins (core-mantle boundary or upper mantle), the clockwise rotation of Korea Peninsula relative to Eurasia is assumed to be

关键词： Cretaceous paleomagnetism geodynamics.

TOW PROBLEMS INFLUENCING ELECTRIC WAVE PROPAGATION IN MOBILE COMMUNICATION

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TOW PROBLEMS INFLUENCING ELECTRIC WAVE PROPAGATION IN MOBILE...

1997 International Symposium on Radio Propagation(ISRP’97)

作者： li darning Ge Zheng Railway Ministry Police College

＜正＞The communication in mobile condition is called mobile *** on contact among fast change is the characteristic of mobile communication,therefore,its channel parameter usually changes fast along with the time *** ...

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《列子》校释补正

中华文化论坛 2019年第5期 71-80,157页

作者：李大明四川师范大学国际教育学院

古今学者对《列子》的研究,成绩斐然,但仍存在不少需要继续探索的问题。今录八条,对《天瑞篇》引 “《黄帝书》”的有关问题、“处常得终”文字的校订、“舜问乎烝”张湛注引郭象注与《庄子知北游》郭象注的异文校订、“孙子非汝有”语... 详细信息

古今学者对《列子》的研究,成绩斐然,但仍存在不少需要继续探索的问题。今录八条,对《天瑞篇》引 “《黄帝书》”的有关问题、“处常得终”文字的校订、“舜问乎烝”张湛注引郭象注与《庄子知北游》郭象注的异文校订、“孙子非汝有”语词的考订,《黄帝篇》“赞”“淫”词义的训释、“列子问关尹”的校释、“悬水三十仞,流沫三十里”的校释,以及《说符篇》“白公问于孔子”的书证,略作补正,以求教于学术界同仁。

关键词：《列子》校订训释补正

MASS DISTRIBUTION FOR 11 MeV NEUTRON-INDUCED FISSION OF 238U

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中国核科技报告 1990年第S2期 18-20页

作者： li Ze Wang Xiuzi Jing Kexing Cui Anzhi Qi Dahai li darning liu Yonghui li Xueliang liu Conggui Su Shuxin TangPeiji liu darning Zhang Sulan GuoJingru Zhang Shengdong (INSTITUTE OF ATOMIC ENERGY, BEIJING)

The fission product mass distribution of238U has been extensively investi- gated,but only a few of those investigations are for fission induced by *** et *** studied the mass distributionsof238U with essentially monoeneragetic neutrons of 1.5,2.0,3.9,5.5,6.9 *** Ze et *** the mass distribution for the fission of238Uwith 8.3 MeV *** Chunhua et al investigated the mass distribu-

关键词： MASS DISTRIBUTION FOR 11 MeV NEUTRON-INDUCED FISSION OF

Si含量对无碳化物贝氏体钢组织与性能的影响

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金属热处理 2018年第10期43卷 5-9页

作者：李大明王福明陈曦陈明毅北京科技大学冶金与生态工程学院

设计钢筋用无碳化物贝氏体钢,并研究Si含量对无碳化物贝氏体钢组织和性能的影响。结果表明,在空冷组织中,无碳化物贝氏体和粒状贝氏体同时存在。染色后,粒状贝氏体中的白色M/A岛可以在100倍下发现;纳米探针分析表明,M/A岛中同时含有马... 详细信息

设计钢筋用无碳化物贝氏体钢,并研究Si含量对无碳化物贝氏体钢组织和性能的影响。结果表明,在空冷组织中,无碳化物贝氏体和粒状贝氏体同时存在。染色后,粒状贝氏体中的白色M/A岛可以在100倍下发现;纳米探针分析表明,M/A岛中同时含有马氏体和残留奥氏体;贝氏体板条之间的薄片状残留奥氏体,在500倍即可分辨清楚。电子衍射分析表明,彩色金相的结果是可靠的。随着Si含量提高,粒状贝氏体减少,无碳化物贝氏体增多,贝氏体板条和残留奥氏体变细。

关键词：无碳化物贝氏体彩色金相残留奥氏体预应力钢筋 M/A组织

达拉特旗某社区2型糖尿病居民视网膜病变的相关因素分析

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中国实用乡村医生杂志 2019年第9期26卷 46-47,50页

作者：杨计军李大明内蒙古达拉特旗朝聚眼科医院内蒙古鄂尔多斯014399

目的分析内蒙古达拉特旗某社区2型糖尿病患者视网膜病变发生的相关危险因素。方法2018年6-12月招募达拉特旗地区某社区2型糖尿病患者,进行眼部及全身检査,包括视力、眼底改变情况,并收集患者一般情况及实验室相关检查资料。结果共有351... 详细信息

目的分析内蒙古达拉特旗某社区2型糖尿病患者视网膜病变发生的相关危险因素。方法2018年6-12月招募达拉特旗地区某社区2型糖尿病患者,进行眼部及全身检査,包括视力、眼底改变情况,并收集患者一般情况及实验室相关检查资料。结果共有351例2型糖尿病患者接受检查,其中患有视网膜病变者共89例(25.4%)。回归分析结果显示,糖尿病病程、收缩压、空腹血糖与视网膜病变的发生密切相关(P<0.05)。结论糖尿病患者应控制相关因素,并常规进行眼科检查,及早发现、及早处理可能出现的糖尿病视网膜病变。

关键词：糖尿病并发症视网膜病变危险因素

广西大厂矿田铜坑-长坡矿区闪锌矿的标型特征研究

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矿物岩石 1989年第2期9卷 65-72页

作者：周卫宁傅金宝李达明中国有色金属工业总公司矿产地质研究院

本文从化学成分和物理性质对与锡多金属矿床有关的铁闪锌矿进行研究,得出其富Fe、In、Sn、As、Se;贫Cd、Tl、Te;Ga/In<<1,比磁化系数、反射率、晶胞棱长均较高,比重和维克硬度较低。表明本区的锡多金属矿床与岩浆热液有密切关系。矿床... 详细信息

本文从化学成分和物理性质对与锡多金属矿床有关的铁闪锌矿进行研究,得出其富Fe、In、Sn、As、Se;贫Cd、Tl、Te;Ga/In<<1,比磁化系数、反射率、晶胞棱长均较高,比重和维克硬度较低。表明本区的锡多金属矿床与岩浆热液有密切关系。矿床的矿化温度为284.5℃,硫逸度为10^(-12)巴。

关键词：闪锌矿标型矿物锡多金属矿床

恶性疟原虫74肽抗原基因在减毒鼠伤寒沙门氏菌的表达和家兔免疫应答

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微生物学报 1996年第3期36卷 234-236页

作者：黄建生王昌才钟雄林任大明李全贞第一军医大学分子生物学研究所广州510515 复旦大学遗传所国家重点实验室上海200433 第一军医大学热带医学研究所广州510515

利用减毒鼠伤寒沙门氏菌来表达外源抗原并制备口服活菌苗,是疫苗研究的一个新的突破。作者已在减毒鼠伤寒沙门氏菌SL3261以β—半乳糖苷酶(GZ)融合蛋白的形式表达了人工合成的恶性疟原虫74肽基因HGFC。现报道用活菌SL3261(pWRC)(C组)、S... 详细信息

利用减毒鼠伤寒沙门氏菌来表达外源抗原并制备口服活菌苗,是疫苗研究的一个新的突破。作者已在减毒鼠伤寒沙门氏菌SL3261以β—半乳糖苷酶(GZ)融合蛋白的形式表达了人工合成的恶性疟原虫74肽基因HGFC。现报道用活菌SL3261(pWRC)(C组)、SL3261(pWR450-1)(R组)分别免疫新西兰家兔,研究其在家兔体内免疫应答的结果。

关键词：鼠伤寒沙门氏菌恶性疟原虫 74肽抗原基因