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重庆轨道交通4号线列车牵引系统方案设计与研究

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工程与试验 2022年第3期62卷 91-93页

作者：王小勇刘建李国银谷翠军重庆轨道交通产业投资有限公司重庆401135 重庆中车四方所科技有限公司重庆401133

重庆轨道交通4号线属于As型地铁列车。本文根据As型列车技术标准和车辆性能要求,对列车牵引和电制动性能进行了计算和分析,并基于实际线路进行了线路仿真,根据线路仿真数据和列车运行数据进行了牵引系统主要保护器件的选型,可为以后牵... 详细信息

重庆轨道交通4号线属于As型地铁列车。本文根据As型列车技术标准和车辆性能要求,对列车牵引和电制动性能进行了计算和分析,并基于实际线路进行了线路仿真,根据线路仿真数据和列车运行数据进行了牵引系统主要保护器件的选型,可为以后牵引系统的设计提供工程参考。

关键词：重庆轨道交通4号线 As型地铁列车牵引系统

Stereoselective Synthesis of 2-Deoxy-α-N-Glycosides from Glycals with 1,4,2-Dioxazol-5-ones

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Chinese Journal of Chemistry 2024年第18期42卷 2147-2152页

作者： Zhenpeng Shen guoyin Yin Yangyang li The Institute for Advanced Studies Wuhan UniversityWuhanHubei 430072China

The synthesis of N-glycosides has received significant attention due to their crucial role in carbohydrate *** considerable advancements developed in the construction of N-glycosides,methods for the stereoselective construction of 2-deoxy-α-N-glycosides are still ***,we disclosed a nickel-catalyzed hydroamination of glycals under mild *** transformation could allow for the stereoselective synthesis of an array of 2-deoxy-α-N-glycosides with excellentα-***-catalyzed glycosylation reactions,particularly those involving anomeric C(sp")-metal bond formation,have proven to be an effective and stereoselective strategy for producing various ***,with highlight of the application of this reaction,y-sugar amino acidderivatives weresynthesized.

关键词： 2-Deoxy-α-N-glycosides Nickel catalysis Stereoselectivity Glycals Hydroamination Amides Glycosylation Alkenes ComprehensiveSummary

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枸杞纯生保健啤酒的研制

农产品加工（下） 2009年第4期 58-59,92页

作者：赵春杰吕耀龙刘敏李国银内蒙古农业大学职业技术学院食品系内蒙古土右旗014109 内蒙古农业大学食品科学与工程学院内蒙古呼和浩特010018

枸杞纯生保健啤酒是以枸杞和麦芽为主要原料,采用纯种酿造、无菌过滤和无菌灌装技术生产而成。该产品集纯生啤酒与枸杞的双重营养,是时尚健康的养生酒饮料。介绍了枸杞纯生保健啤酒的酿造工艺及品质控制措施。

关键词：枸杞纯生啤酒发酵

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三亚红峡谷高尔夫球场蛴螬的调查与防治研究

热带农业科学 2017年第7期37卷 46-50页

作者：许天委郝慧华吴小霞李国寅琼台师范学院数理系海南海口571127

调查了三亚红峡谷高尔夫球场草坪不同功能区的蛴螬种类,发现危害该高尔夫球场草坪的蛴螬有铜绿丽金龟、大绿金龟、华南大黑鳃金龟和浅棕鳃金龟。其中,优势种为大绿金龟,次优势种为铜绿丽金龟。在掌握各功能区蛴螬全年的种类及数量消长... 详细信息

调查了三亚红峡谷高尔夫球场草坪不同功能区的蛴螬种类,发现危害该高尔夫球场草坪的蛴螬有铜绿丽金龟、大绿金龟、华南大黑鳃金龟和浅棕鳃金龟。其中,优势种为大绿金龟,次优势种为铜绿丽金龟。在掌握各功能区蛴螬全年的种类及数量消长情况基础上,用毒死蜱、辛硫磷和绿僵菌进行防治。试验结果表明,毒死蜱施药后15 d防效达100%;辛硫磷在施药30 d时,虫口减退率达94.58%;绿僵菌施药时间30 d防效达91.12%。可见,绿僵菌菌剂随着施药时间的增加,速效性和持效性均优于毒死蜱和辛硫磷。

关键词：蛴螬高尔夫草坪防治绿僵菌

Recent advances in the synthesis of 1,1-diarylalkanes by transitionmetal catalysis

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Science China Chemistry 2021年第4期64卷 513-533页

作者： Md.Belal Zheqi li Xiuqiang Lu guoyin Yin The Institute for Advanced Studies Wuhan UniversityWuhan 430072China School of Ocean Science and Biochemistry Engineering Fuqing Branch of Fujian Normal UniversityFuzhou 350300China

1,1-Diaryl moieties are core structures in a wide range of bioactive and pharmaceutical ***-metal catalysis is a convenient approach to accessing these invaluable compounds affording high yields and *** review summarizes 1,1-diarylalkanes synthesis through transition metal *** focus is given to recent developments,such as reductive cross-electrophile couplings,benzylic C–H bond arylation,transformations involving metal migration,asymmetric hydrogenation of 1,1-diarylalkenes and three-component coupling reactions.

关键词： transition metal catalysis 1,1-diarylalkanes

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皂化对枸杞色素提取效果的影响

农产品加工（下） 2009年第1期 28-31页

作者：李国银李正英李成军赵春杰李艳梅内蒙古农业大学食品科学与工程学院内蒙古呼和浩特010018 内蒙古农业大学职业技术学院食品科学与工程系内蒙古包头014109 内蒙古蒙西高新技术集团公司内蒙古乌海014014

采用单因素试验和正交试验,以提取物中色素含量为考察指标,对枸杞色素提取过程中的皂化处理进行了研究。结果表明,各因素的影响程度依次为:皂化温度>NaOH质量分数>皂化液与枸杞干果果肉的比例(液料比)>皂化时间。确定了枸杞皂化处理的... 详细信息

采用单因素试验和正交试验,以提取物中色素含量为考察指标,对枸杞色素提取过程中的皂化处理进行了研究。结果表明,各因素的影响程度依次为:皂化温度>NaOH质量分数>皂化液与枸杞干果果肉的比例(液料比)>皂化时间。确定了枸杞皂化处理的最佳条件为:皂化温度40℃,NaOH质量分数1.0%,液料比4:1,皂化时间40min。

关键词：枸杞色素纯化皂化

Catalyst-controlled regiodivergent 1,2-difunctionalization of alkenes with two carbon-based electrophiles

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Science China Chemistry 2022年第3期65卷 514-520页

作者： Md.Belal Zheqi li Lei Zhu guoyin Yin Institute for Advanced Studies Wuhan UniversityWuhan 430072China Institute of Biomedical Materials Industry Technology Hubei Engineering UniversityWuhan 430074China

Regiodivergent catalysis provides an efficient strategic approach for the construction of architecturally different molecules from the same starting materials. In this field, the intermolecular regiodivergent 1,2-difunctionalization of alkenes with two electrophiles is still a challenging task. A ligand-controlled, nickel-catalyzed regiodivergent dicarbofunctionalization of alkenes using both aryl/vinyl halides and acetals as electrophiles under mild reductive reaction conditions has been accomplished. This study provides a general approach to accessing both β-methoxyl esters and γ-methoxyl esters from readily available acrylates,aryl halides and acetals. Experimental mechanistic evidence supports that the difference in regioselective outcomes is attributed to the ligand tuning the reactivity of the nickel catalyst, which results in different catalytic cycles operating for these two reaction conditions.

关键词： divergent catalysis difunctionalization of alkenes regioselectivity carbon electrophiles nickel catalysis

An artificial-neural-network-based surrogate modeling workflow for reactive transport modeling

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Petroleum Research 2022年第1期7卷 13-20页

作者： Yupeng li Peng Lu guoyin Zhang Beijing Research Center of EXPEC Advanced Research Center Aramco AsiaBeijingChina EXPEC Advanced Research Center Saudi AramcoDhahranSaudi Arabia China University of Petroleum QingdaoChina

Process-based reactive transport modeling(RTM)integrates thermodynamic and kinetically controlled fluid-rock interactions with fluid flow through porous media in the subsurface and surface *** is usually conducted through numerical programs based on the first principle of physical ***,the calculation for complex chemical reactions in most available programs is an iterative process,where each iteration is in general computationally intensive.A workflow of neural networkbased surrogate model as a proxy for process-based reactive transport simulation is established in this *** workflow includes(1)base case RTM design,(2)development of training experiments,(3)surrogate model construction based on machine learning,(4)surrogate model validation,and(5)prediction with the calibrated *** training experiments for surrogate modeling are generated and run prior to the predictions using *** results show that the predictions from the surrogate model agree well with those from processes-based RTM but with a significantly reduced computational *** well-trained surrogate model is especially useful when a large number of realizations are required,such as the sensitivity analysis or model calibration,which can significantly reduce the computational time compared to that required by *** benefits are(1)it automatizes the experimental design during the sensitivity analysis to get sufficient numbers and coverage of the training cases;(2)it parallelizes the calculations of RTM training cases during the sensitivity analysis to reduce the simulation time;(3)it uses the neural network algorithm to rank the sensitivity of the parameters and to search the optimal solution for model calibration.

关键词： Reactive transport modeling Surrogate model Machine learning Dolomitization Carbonate reservoir

多抗霉素在海滨雀稗草坪根系层土壤和水中的残留研究

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热带农业工程 2018年第1期42卷 37-39页

作者：许天委郝慧华李国寅吴小霞琼台师范学院数理系海南海口571127

介绍多抗霉素在高尔夫球场海滨雀稗草坪根系层土壤和水样中残留的测定方法,通过模拟高尔夫球场建植,进行农药残留研究。结果表明:在试验区内,当海滨雀稗草坪根系层土壤取样深度为0,施药量为0.30 g/m^2,土壤中多抗霉素最大残留量为0.066 ... 详细信息

介绍多抗霉素在高尔夫球场海滨雀稗草坪根系层土壤和水样中残留的测定方法,通过模拟高尔夫球场建植,进行农药残留研究。结果表明:在试验区内,当海滨雀稗草坪根系层土壤取样深度为0,施药量为0.30 g/m^2,土壤中多抗霉素最大残留量为0.066 mg/kg;当取样深度为30 cm、施药量为0.10 g/m^2或取样深度为40 cm、施药剂量为0.30 g/m^2,土壤中多抗霉素残留量均为LOD(小于0.010 mg/kg);当施药量分别为0.10、0.20、0.30 g/m^2时,水样中多抗霉素残留浓度最低为0.011 mg/L,最高为0.096 mg/L。建议在高尔夫球场海滨雀稗草坪养护过程中,采用10%的多抗霉素可湿性粉剂按0.30 g/m^2施药量每7 d进行喷雾处理。

关键词：多抗霉素海滨雀稗土壤水样残留