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基于模糊集理论的图书馆办公室工作评价

河南图书馆学刊 2009年第6期29卷 51-52页

作者：管永昌郑州大学图书馆河南郑州450001

将模糊综合评判法应用到办公室工作考核中,以期对办公室工作的考核更加科学公正。

关键词：模糊集办公室工作评价

同方期刊数据库博看期刊评论

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微创引流术治疗脑外伤硬脑膜外血肿的疗效

中国继续医学教育 2018年第14期10卷 102-104页

作者：关永昌唐朝柳云恩中国医科大学附属第四医院神经外科辽宁沈阳110001 解放军沈阳军区总医院急诊医学部辽宁沈阳110016

目的研究颅内血肿微创引流术治疗脑外伤所致硬脑膜外血肿患者的疗效及安全性。方法选取我院脑外伤所致硬脑膜外血肿患者86例,随机分为两组,各43例。研究组采用颅内血肿微创引流术治疗,对照组采用开颅手术治疗。观察两组术中出血量、手... 详细信息

目的研究颅内血肿微创引流术治疗脑外伤所致硬脑膜外血肿患者的疗效及安全性。方法选取我院脑外伤所致硬脑膜外血肿患者86例,随机分为两组,各43例。研究组采用颅内血肿微创引流术治疗,对照组采用开颅手术治疗。观察两组术中出血量、手术时长、住院时长及并发症发生情况。结果研究组出血量、手术时长及住院时长少于对照组,差异有统计学意义(P<0.05);研究组并发症发生率[9.3%(4/43)]低于对照组[27.9%(12/43)],差异有统计学意义(P<0.05)。结论颅内血肿微创引流术治疗脑外伤所致硬脑膜外血肿能显著降低术中出血量,缩短手术时长,降低并发症发生率,促进患者康复。

关键词：微创引流术开颅手术脑外伤硬脑膜外血肿并发症

脑疝复位天幕切开术治疗重型脑外伤脑疝的临床效果

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中国继续医学教育 2018年第12期10卷 95-97页

作者：关永昌罗振宇柳云恩中国医科大学附属第四医院神经外科辽宁沈阳110001 解放军沈阳军区总医院急诊医学部辽宁沈阳110016

目的分析脑疝复位天幕裂孔切开术治疗重型脑外伤脑疝患者的疗效及安全性。方法选取2015年3月—2017年3月我院重型脑外伤脑疝患者44例,根据术式不同分组,各22例。对照组施行常规手术,研究组施行脑疝复位天幕裂孔切开术。对比两组并发症... 详细信息

目的分析脑疝复位天幕裂孔切开术治疗重型脑外伤脑疝患者的疗效及安全性。方法选取2015年3月—2017年3月我院重型脑外伤脑疝患者44例,根据术式不同分组,各22例。对照组施行常规手术,研究组施行脑疝复位天幕裂孔切开术。对比两组并发症、术后6个月治疗效果(GOS)。结果与对照组比较,研究组并发症发生率较低,差异有统计学意义(P<0.05);术后6个月,研究组治疗有效率较对照组高,差异有统计学意义(P<0.05)。结论重型脑外伤脑疝患者采用脑疝复位天幕裂孔切开术治疗疗效确切,可降低并发症发生率。

关键词：脑外伤脑疝天幕裂孔切开术常规手术

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矿用密闭开槽机的研制与应用

现代制造技术与装备 2021年第3期57卷 61-62页

作者：管永昌武利民闫子龙廊坊景隆重工机械有限公司廊坊065000

随着我国专用装备制造水平的日益提高,煤矿开采全面机械化和智能化行程不断加快,为我国煤矿通风控制提供了全新的工艺流程。全液压密闭开槽机既能更好地提高煤矿开采过程中密闭工程的整体效率和施工过程中的整体质量,又能保证施工进度,... 详细信息

随着我国专用装备制造水平的日益提高,煤矿开采全面机械化和智能化行程不断加快,为我国煤矿通风控制提供了全新的工艺流程。全液压密闭开槽机既能更好地提高煤矿开采过程中密闭工程的整体效率和施工过程中的整体质量,又能保证施工进度,并降低施工人员的劳动强度,从而有效减少煤矿开采过程中所出现的安全事故及地质灾害。基于此,分析和阐述全液压密闭开槽机的设计方案和应用,期望能够更好地为矿产工业的施工提供全新的施工方法,从而提高施工工艺的整体质量。

关键词：密闭开槽机施工工艺机械化智能化

碳硅复合固体酸催化剂的制备及其催化性能研究

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肇庆学院学报 2019年第2期40卷 45-50,55页

作者：陈绮琪黄贵玲刘文森官永昌闫鹏肇庆学院环境与化学工程学院广东肇庆526061

以氧化硅(SBA-15)为载体,蔗糖为碳源,通过碳化、磺化法制备碳硅复合固体酸催化剂,利用XRD、BET、TG等对催化剂进行表征分析,并将其用于催化松节油水合反应,考察催化剂制备条件和水合反应条件对产品中松油醇含量的影响.适宜的催化剂制备... 详细信息

以氧化硅(SBA-15)为载体,蔗糖为碳源,通过碳化、磺化法制备碳硅复合固体酸催化剂,利用XRD、BET、TG等对催化剂进行表征分析,并将其用于催化松节油水合反应,考察催化剂制备条件和水合反应条件对产品中松油醇含量的影响.适宜的催化剂制备条件为:碳用量40%,碳化时间15 h,磺化时间9 h.最佳催化合成工艺条件为:催化剂用量0.3 g,n(α-蒎烯):n(一氯乙酸):n(H_2O)=1:1.5:1.5,反应温度70℃,反应时间3 h,在该反应条件下,α-蒎烯转化率为100%,产物中α-松油醇含量为85.81%.

关键词：碳硅固体酸氧化硅(SBA-15) 水合反应松节油 α-松油醇

A model for carbon isotope distribution of methane duringdiagenesis

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Chinese Science Bulletin 1998年第7期43卷 576-578页

作者： Ping guan yongchang Xu Wenhui Liu Darui Wang Peking Univ Dept Geol Beijing 100871 Peoples R China Chinese Acad Sci Lanzhou Inst Geol Lanzhou 730000 Peoples R China Res Inst Petr Explorat & Dev Beijing 100083 Peoples R China

The evolution of methane carbon isotope with depth has been discussed based on diagenetic reaction kinetics and isotopic Rayleigh fractionational theory. A mathematical model to describe data of methane carbon isotope... 详细信息

关键词： methane carbon isotope maturity Rayleigh fractionation.

Isotopic composition charac-teristics and identification of immature and low-mature oils

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Chinese Science Bulletin 2001年第22期46卷 1923-1929页

作者： XU yongchang SHEN Ping LIU Wenhui guan Ping HUANG Difan State Key Laboratory of Gas Geochemistry Lanzhou Institute of GeologyChinese Academy of SciencesLanzhou 730000China Department of Geology Peking UniversityBeijing 100871China Institution of Exploration&Development China Petroleum&NaturalGas Corporation LimitedBeijing 100083China

Isotopic composition characteristics and the significance of immature and low-mature oils are first systematically discussed. The carbon isotopes of the whole oil can be divided into two groups, one has δ13C main peak values ranging from -30‰ to -29 and the other from -27‰ to -25‰, they are related to lacustrine and salt-lake facies or swamp facies, respectively. The carbon isotopic fractionation among different group components is relatively small, usually less than 2‰ and the biggest difference in fractionation often occurs between saturated and aromatic fractions. Their δD values vary between -180‰ and -130‰. The main peak of their δD values concentrates between -170‰ and -150‰, suggesting a domination of lacustrine facies. However, the secondary peak ranges from -160‰ to -150‰, showing a frequent salinization of paleo-water bodies. The average δ13C values of the methane vary between -50‰ and -52‰, about 10‰ lighter than those of mature oils. There is a relatively good

关键词： immature and low-mature oil isotope associated gas.

Natural gas geochemistry of low evolutionary stage of mediumand small-sized basins in Yunnan Province, southwestern China

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Chinese Science Bulletin 1999年第18期44卷 1709-1712页

作者： yongchang Xu Ping Shen Jiangjing Zhen Wenhui Liu Ping guan Chinese Acad Sci Lanzhou Inst Geol Lanzhou 730000 Peoples R China Peking Univ Dept Geol Beijing 100871 Peoples R China

The biogenic gas and premature-low mature associated gases in some medium and small-sized basins of Yannan Province, such as Luliang, Yanglin, Baoshan and Jinggu basins, have beed researched. The results show that the biogenic-gas consists mainly of methane which is more than 99% in gasous hydrocarbons and of lighter carbon isotopic composition with δ13C1 values from -60.0‰ to - 75.4‰. The methane carbon isotopic compositions in the Baoshan Basin is relatively heavy (δ13C1, - 60‰-- 65‰), but those in Luliang and

关键词： low-evolution natural gas carbon isotope.

Prediction of M–A Constituents and Impact Toughness in Stir Zone of X80 Pipeline Steel Friction Stir Welds

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金属学报:英文版 2023年第4期36卷 573-585页

作者： Xueli Wang Xin Ji Bin He Dongpo Wang Chengning Li yongchang Liu Wei guan Lei Cui Tianjin Key Laboratory of Advanced Joining Technology School of Materials Science and EngineeringTianjin UniversityTianjin 300354China

This study explored a strategy for predicting the proportion of martensite–austenite(M–A)constituents and impact toughness of stir zone(SZ)on X80 pipeline steel joints welded by friction stir welding(FSW).It is found that the welding forces,including the traverse force(F_(x)),the lateral force(F_(y))and the plunge force(F_(z)),are the key variables related to the change of welding parameters and influence remarkably the characteristics of M–A constituents and impact toughness of *** impact toughness of SZ is commonly lower than that of the base material due to the formation of lath bainite and coarsening of *** characteristics of M–A constituents in SZ are sensitive to the variation of welding parameters and respond well to the change of welding *** proportion of small island M–A constituents increases with the decrease in rotational speed and the increase in *** increase in the amount of island M–A constituents is beneficial to improve the impact toughness of *** on the above findings,a machine learning(ML)model for predicting the M–A constituents and impact toughness is constructed using the force features as the input data *** force data-driven ML model can predict the M–A constituents and impact toughness precisely and exhibits higher accuracy than ML built with welding *** is believed that the high accuracy is achieved because the force features include more details of FSW process,such as the heat generation,material flow,plastic deformation,and so on,which govern the microstructural evolution of SZ during FSW.

关键词： Friction stir welding Pipeline steel Welding force M-A constituents Impact toughness