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地铁隧道探地雷达检测车的研发与应用

工程地球物理学报 2024年第4期21卷 713-721页

作者：柴新朝侯智超王春洋李亚军北京城建勘测设计研究院有限责任公司北京100101 武汉方中定自动化科技有限公司湖北武汉430000

随着国内城市轨道交通行业的快速发展,地铁隧道病害问题也日益突出,现阶段隧道内探地雷达检测主要以人工或者综合检测车为主,人工数据稳定性差且生产效率低,综合检测车造价大,笨重。本文研发的探地雷达检测车采用模块化、小型化和轻量... 详细信息

随着国内城市轨道交通行业的快速发展,地铁隧道病害问题也日益突出,现阶段隧道内探地雷达检测主要以人工或者综合检测车为主,人工数据稳定性差且生产效率低,综合检测车造价大,笨重。本文研发的探地雷达检测车采用模块化、小型化和轻量化设计,两人轻松搭建,可以有轨和无轨自由切换,双通道检测,工作效率高,安全性好,实际检测结果表明,采用检测车可以快速稳定地对地铁隧道壁后脱空进行识别,提高了检测效率和精度,较人工检测效率提升75%;同时提供三维激光扫描设备接口,可以一车两用,为后期与三维激光扫描的联合作业以及智能化检测打下基础。

关键词：地铁隧道脱空检测人工模块化探地雷达轨道力矩

维普期刊数据库博看期刊

Iron phthalocyanine-catalyzed radical phosphinoylazidation of alkenes:A facile synthesis of β-azido-phosphine oxide with a fast azido transfer step

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Chinese Journal of Catalysis 2021年第10期42卷 1634-1640页

作者： Xiaoxu Ma Mong-Feng Chiou liang Ge Xiaoyan li yajun li li Wu Hongli Bao Key Laboratory of Coal to Ethylene Glycol and Its Related Technology State Key Laboratory of Structural ChemistryCenter for Excellence in Molecular SynthesisFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianChina School of Chemistry and Environmental Engineering Wuhan Institute of TechnologyWuhan 430205HubeiChina University of Chinese Academy of Sciences Beijing 100049China

Phosphinoylazidation of alkenes is a direct method to build nitrogen-and phosphorus-containing compounds from feed-stock *** the advances in other phosphinyl radical related difunctionalization of alkenes,catalytic phosphinoylazidation of alkenes has not yet been ***,we describe the first iron-catalyzed intermolecular phosphinoylazidation of styrenes and unactivated *** method is practically useful and requires a relatively low loading of *** studies confirmed the radical nature of the reaction and disclosed the unusually low activation energy 4.8 kcal/mol of radical azido group transfer from the azidyl iron(III)phthalocyanine species(PcFeulN3)to a benzylic *** work may help to clarify the mechanism of iron-catalyzed azidation,inspire other mechanism studies and spur further synthetic applications.

关键词： Iron phthalocyanine Phosphinoylazidation Difunctionalization Radical group transfer Density functional theory calculation

Radial Permeability Measurements for Shale Using Variable Pressure Gradients

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Acta Geologica Sinica(English Edition) 2020年第2期94卷 269-279页

作者： FAN Kunkun SUN Renyuan DEREK ELS WORTH DONG Mingzhe li yajun YIN Congbin li Yanchao CHEN Zhongwei WANG Chunguang State Key Laboratory of Mining Disaster Prevention and Control Shandong University of Science and TechnologyQingdao 266555China College of Energy and Mining Engineering.Shandong University of Science and Techology.Qingdao 266555 China College of Petroleum Engineering Chinese University of PetroleumQingdao 266555ShandongChina Energy and Mineral Engineering Pennsylvania State University PA 16X01USA Department of Chemical and Petroleum Engineering University of CalgaryAB T2NIN4Canada Downhole Service Company.Chuanqing Drilling Company CNPCChengdu 610051SichuanChina School of Mechanical and Mining Engineering The University of QueenslandQLD 4074Australia

Shale gas is becoming an important component of the global energy supply, with permeability a critical controlling factor for long-term gas production. Obvious deviation may exist between helium permeability determined using small pressure gradient(SPG) methods and methane permeability obtained under actual field production with variable pressure gradients(VPG). In order to more accurately evaluate the matrix permeability of shale, a VPG method using real gas(rather than He) is established to render permeability measurements that are more representative of reservoir conditions and hence response. Dynamic methane production experiments were performed to measure permeability using the annular space in the shale cores. For each production stage, boundary pressure is maintained at a constant and the gas production with time is measured on the basis of volume change history in the measuring pump. A mathematical model explicitly accommodating gas desorption uses pseudo-pressure and pseudo-time to accommodate the effects of variations in pressuredependent PVT parameters. Analytical and semi-analytical solutions to the model are obtained and discussed. These provide a convenient approach to estimate radial permeability in the core by nonlinear fitting to match the semi-analytical solution with the recorded gas production data. Results indicate that the radial permeability of the shale determined using methane is in the range of 1×10-6– 1×10-5 mD and decreases with a decrease in average pore pressure. This is contrary to the observed change in permeability estimated using helium. Bedding geometry has a significant influence on shale permeability with permeability in parallel bedding orientation larger than that in perpendicular bedding orientation. The superiority of the VPG method is confirmed by comparing permeability test results obtained from both VPG and SPG methods. Although several assumptions are used, the results obtained from the VPG method with reservoir gas are m

关键词： shale radial permeability variable pressure gradients pseudo pressure pseudo time

Red fluorescent protein (DsRed2), an ideal reporter for cotton genetic transformation and molecular breeding

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The Crop Journal 2018年第4期6卷 366-376页

作者： lin Sun Muna Alariqi Yi Zhu Jianying li Zelin li Qing Wang yajun li Hangping Rui Xianlong Zhang Shuangxia Jin National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University Wuhan 430070 Hubei China Department of Agronomy and Pastures Faculty of Agriculture Sana'a University Yemen

Genes encoding reporter proteins are used as visual marker-assisted tools in genetic transformation as well as plant breeding. In this study, the red fluorescent protein identified in Discosoma sp. coral(DsRed2) was successfully used as a visual marker for cotton genetic engineering. DsRed2 was successfully expressed in two cotton cultivars,JIN668 and YZ1, driven by the Ca MV-35 S promoter via the Agrobacterium-mediated transformation. Our results suggest that DsRed2 expression provides an early-stage selection tool for the transgenic calli via visual observation. Red fluorescence can be detected not only in callus and somatic embryos but also in most tissues and organs of mature plants. The transgenic line Yz-2-DsRed2 was crossed with four different cotton cultivars to assess the transgene heritability and stability in different genetic *** heritability of the red color was highly stable when Yz-2-DsRed2 was used as a male parent. The DsRed2 gene expressed 100% in the F_1 hybrids. To investigate the relationship between DsRed2 transcription and DNA methylation, a methylation-specific PCR approach was applied to the Ca MV-35 S promoter region. The results showed a negative association between DNA methylation level in the promoter region and the transgene *** together, these findings suggest DsRed2 a visual reporter gene for cotton genetic transformation and molecular breeding programs.

关键词： DsRed2 Reporter gene Transgenic cotton Molecular breeding DNA methylation

Evaluation of efficacy and safety of gandouling plus sodium dimercaptosulphonate in treatment of patients with neurological Wilson's disease from China

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Journal of Traditional Chinese Medicine 2018年第5期38卷 781-786页

作者： Zhang Jing Xie Daojun Guo Yanbing li yajun li liangyong Han Hui Zhang Juan Chen Huaizhen Wang Meixia Department of Neurology the First Affiliated Hospital of Anhui University of Traditional Chinese Medicine Department of Pediatrics the First Affiliated Hospital of Anhui University of Traditional Chinese Medicine

OBJECTIVE: To evaluate the efficacy and safety of gandouling plus sodium dimercaptosulphonate(DMPS) on neurological Wilson's disease(WD) in ***: We retrospectively evaluated the clinical records of 125 WD patients with neurological syndromes who were treated with gandouling plus sodium DMPS or DMPS used alone. All patients had a history of neurological deterioration during their diseases courses. The clinical efficacies, adverse reactions, and results of the various hematological and biochemical investigations were recorded for statistical ***: 92.30%(60 patients) of the WD patients treated with the combined therapy experienced an improved or stable neurological condition paral-leled by a significantly improved GAS score. Meanwhile, the WBC and PLT counts stabilized, liver function and renal function were improved or remained stable. The combined therapy also obviously promoted the 24-h urinary copper excretion. In particular, only 30.76% of the WD patients experienced mild adverse reactions, including neurological deterioration in 5 patients(7.69%), hepatic worsening in 1 subject(1.89%), which was less frequently than those in the control group treated with DMPS ***: Our findings indicate that the safety and efficacy of gandou-ling plus DMPS is superior to those of DMPS used alone in the WD patients with neurological symptoms.

关键词： Wilson's disease Gandouling,Sodium dimercaptosulphonate Neurological deterioration

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调和汽油的GC-MS检验与区分

刑事技术 2024年第1期49卷 38-42页

作者：张冠男刘占芳孙振文周正李光耀李亚军邓显贺乔婷朱军公安部鉴定中心北京100038

调和汽油在涉火案件中出现的频率逐渐增加,其特殊的组成可能对成分研判造成干扰。为准确识别汽油组分,区分不同来源的调和汽油,本文依托气相色谱–质谱(GC-MS)检验了部分典型调和油品,分析了相关样品的谱图特征并进行归类。结果表明,案... 详细信息

调和汽油在涉火案件中出现的频率逐渐增加,其特殊的组成可能对成分研判造成干扰。为准确识别汽油组分,区分不同来源的调和汽油,本文依托气相色谱–质谱(GC-MS)检验了部分典型调和油品,分析了相关样品的谱图特征并进行归类。结果表明,案件中常见的调和油品按照谱图主要特点可划分为添加剂异常、异构烷烃异常、直链烷烃异常和多组分异常四类。其中前两类对汽油及其残留物鉴定基本不构成干扰,而直链烷烃异常类油品可能引起误判,多组分异常类油品则不宜轻易下汽油结论。该研究结果对特殊调和汽油及其残留物的检验鉴定有一定的指导意义,对于涉火案件中汽油的比对分析和来源推断具有实战应用价值。

关键词：微量物证气相色谱–质谱汽油涉火案件残留物

Integration and Optimized Utilization of Naphtha Resources

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China Petroleum Processing & Petrochemical Technology 2010年第2期12卷 51-56页

作者： li yajun Zhang Tingting (Key Laboratory of Enhanced Heat Transfer and Energy Conservation,Ministry of Education,School of Chemical and Chemical Engineering,South China University of Technology,Guangzhou 510640) Key Laboratory of Enhanced Heat Transfer and Energy Conservation Ministry of Education South China University of Technology Guangzhou 510640 China

Naphtha is an important raw material for manufacture of clean fuels and ethylene products. However, China is experiencing a serious imbalance between supply and demand of naphtha, due to its rapidly increasing car population and booming ethylene industry, the demand of which cannot be met by the domestic depleting crude oil resources. Focusing on alleviating the above-mentioned naphtha deficit, this paper puts forward an idea suggesting that China＇s limited naphtha resource should be used reasonably. Naphtha feedstocks with more potential aromatic content should be used in catalytic reforming process to produce clean fuel products, and those feedstocks with more paraffinic content should be used in ethylene production. Meanwhile, industry tests show that the low-valued naphtha byproduct from ethylene plants and the products of secondary processing units at refineries can also be applied so as to extend the naphtha supply for manufacture of cleaner fuels and ethylene derivatives.

关键词： cleaner gasoline ethylene, naphtha feedstock optimization

Analysis on electrical transport characteristic of 8-hydroquinoline aluminum film

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Chinese Science Bulletin 1998年第2期43卷 121-124页

作者： ligong Zhang Dapeng Jiang Xinguang Ren Xueyan liu yajun li Ande Lu Jinshan Yuan Chinese Acad Sci Changchun Inst Phys Changchun 130021 Peoples R China

The current_voltage and capacitance_voltage characteristic of the organic single_layered electroluminescent diode utilizing 8_hydroquinoline aluminum as active layer have been measured under bias ranging from -5 V to 28 V in this work. A simple model for charge transport process of 8_hydroquinoline aluminum layer is proposed to illuminate the conductivity characteristic of the diode.

关键词： hydroquinoline aluminum current-voltage characteristic capacitance-voltage characteristic.

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李亚军:“设计”是一项系统性的科学研究

设计 2021年第8期34卷 66-69页

作者：李亚军南京理工大学设计艺术与传媒学院南京理工大学设计艺术与传媒学院学术委员会

《设计》:在疫情防控期间、疫情之后及未来的一段时间,想请您谈谈疫情对于设计产生了哪些影响,或者结合疫情作为大背景对设计有没有其他的思考?李亚军:面对突如其来的疫情,对整个的设计行业,诸如设计教育、设计产业,均带来了较大的影响... 详细信息

《设计》:在疫情防控期间、疫情之后及未来的一段时间,想请您谈谈疫情对于设计产生了哪些影响,或者结合疫情作为大背景对设计有没有其他的思考?李亚军:面对突如其来的疫情,对整个的设计行业,诸如设计教育、设计产业,均带来了较大的影响。首先,从设计行业来说,由于疫情的突发,对人力资源方面产生了影响,相关人员不能够集中。

关键词：疫情防控人力资源科学研究李亚军系统性《设计》