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Organic Chemistry Frontiers 2022年第4期9卷 966-972页

作者： Keyuan Zhang Tianbing Liang yulong Wang Chonglong He Mingyou Hu xin-Hua Duan Le Liu School of Chemistry Xi’an Key Laboratory of Sustainable Energy Materials ChemistryMOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed MatterXi’an Jiaotong UniversityXi’an 710049China

A practical method for the synthesis of allylic thioacyanates from allylic alcohols was disclosed employing K_(2)S_(2)O_(8) as the oxidant and NH_(4)SCN as the thiocyanate *** introducing a leaving group in advance,a series of disubstituted and monosubstituted allylic thiocyanate compounds were obtained in moderate to good *** transition metal-free method features mild reaction conditions,broad sub-strate scope and operational *** potential application of this method was demonstrated by some derivatization reactions of the product and mechanistic investigation indicated that a radical process is involved.

关键词： alcohols simplicity substituted

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Chinese Journal of Aeronautics 2008年第6期21卷 512-517页

作者： Li yulong Zhang Yongkang Xue Pu School of Aeronautics Northwestern Polytechnical University Xi'an 710072 China

With dimensional analysis and similarity theory, the model similarity law of aircraft structures trader bird impact load is investigated. Numerical calculations by means of nonlinear dynamic software ANSYS/LS-DYNA are conducted on the finite element models constructed with different scaling factors. The influence of strain rate on the model similarity law is found to be dependent on the strain rate sensitivity of materials and scale factors. Specifically, materials that are not sensitive to strain rate obey the model similarity law in the bird impact process. The conclusions obtained are supposed to provide a theoretical basis for the experimental work of bird impact on aircraft structure.

关键词： dimensional analysis similarity law bird impact strain rate finite element analysis

Preparation of Al-doped ZnO nanocrystalline aggregates with enhanced performance for dye adsorption

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Science China(Physics,Mechanics & Astronomy) 2012年第7期55卷 1198-1202页

作者： ZHANg Jin QUE Wenxiu YUAN Yuan ZHONg Peng LIAO yulong Electronic Materials Research Laboratory School of Electronic and Information EngineeringXi'an Jiaotong UniversityXi'an 710049China

Al-doped ZnO (AZO) nanocrystalline aggregates (NCAs) were prepared by a low cost colloid chemistry method and effects of the Al-doped concentration on the morphological and structural properties of the AZO NCAs were studied. The dye adsorption ability of the AZO NCAs with various Al-doped concentrations was also investigated. Results indicate that the doping of the Al ions not only does not change the wurtzite structure of the ZnO crystal but also can reduce the crystallite grain size and the particle size distribution of the NCAs, which gives them a higher specific surface area and dye adsorption ability than that of the ZnO NCAs. The as-prepared AZO NCAs would be a promising material to be applied in the dye sensitized solar cells and water treatment.

关键词： zinc oxide nanocrystalline aggregates adsorption

Symptoms Burden and Health-related Quality of Life in Chinese Patients with Primary Biliary Cholangitis

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Journal of Clinical and Translational Hepatology 2021年第6期9卷 860-867页

作者： Yansheng Liu Siyuan Tian gui Jia Zheyi Han Changcun guo yulong Shang Ying Han National Clinical Research Center for Digestive Diseases and xijing Hospital of Digestive Diseases Xijing HospitalAir Force Military Medical UniversityXi’anShaanxiChina

Background and Aims:Primary biliary cholangitis(PBC)is a chronic liver disease that negatively affects the health-related quality of life(HRQoL)of ***,the HRQoL of Chinese patients has been neglected for a long *** present study aimed to assess the HRQoL of Chinese patients with PBC and explore the clinical variables correlating to the improvement of itch and ***:This was an observational,cross-sectional *** PBC-40 and itch numerical rating scales were used to evaluate the symptoms and HRQoL of ***:A total of 383 patients were recruited,and 86.4%were female,with a median age of 55 years(range:49-63 years).We found that females had significantly higher scores than males in symptoms(p=0.033)and cognitive domains(p=0.021),and the fatigue domain was higher in elderly patients(p=0.007).Meanwhile,patients whose body mass index wasghest scores in the symptoms(p=0.009),fatigue(p=0.010),and cognitive(p=0.019)*** at participation(odds ratio[OR]=1.068,p=0.015)and albumin level at 12 months after ursodeoxycholic acid treatment(OR=208.807,p=0.025)were independent factors that affected the improvement of the itch and fatigue domains,***:The HRQoL of Chinese patients with PBC was significantly impaired depending on sex,age,and body mass *** and albumin level were significantly associated with the improvement of itch and fatigue,***,treatment and support aimed at these two factors can be provided to improve the HRQoL of patients.

关键词： Primary biliary cholangitis PBC-40 Health-related quality of life Pruritus

Enhancing the performance of poly(3-hexylthiophene)/ZnO nanorod arrays based hybrid solar cells through incorporation of a third component

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Science China(Physics,Mechanics & Astronomy) 2014年第7期57卷 1289-1298页

作者： ZHONg Peng QUE Wenxiu ZHANg Jin YUAN Yuan LIAO yulong YIN xi.gTian KONg LingBing HU xiao Electronic Materials Research Laboratory School of Electronic and Information Engineering Xi'an Jiaotong University International Center for Dielectric Research Xi'an Jiaotong University School of Materials Science and Engineering Nanyang Technological University

Sparse ZnO nanorod arrays(NRAs)are fabricated on transparent conducting oxide coated glass substrates by using a modified liquid phase epitaxial growth *** adjusting the polymer concentrations and the spin-coating parameters,full infiltration of poly(3-hexylthiophene)(P3HT)into the as-prepared ZnO NRAs is achieved at 130°C in vacuum.A third component is incorporated into the P3HT/ZnO NRAs ordered bulk heterojunctions(BHJs)either through ZnO surface modification with N719dye or CdS shell layer or by inclusion of a fullerene derivative into the P3HT *** results indicate that performances of the hybrid solar cells are improved greatly with the incorporation of a third ***,the working principles of these third components differ from one another,according to morphology,structure,optical property,charge transfer and interfacial properties of the composite *** ideal device architecture for hybrid solar cells based on P3HT/ZnO NRAs ordered BHJs is proposed,which can be used as a guidance to further increase the power conversion efficiency of such solar cells.

关键词： hybrid solar cell zinc oxide conjugated polymer surface modification bulk heterojunction power conversion efficiency

厄瓜多尔ISHPINgO区块产层套管固井技术

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石油地质与工程 2024年第4期38卷 105-111页

作者：来鹏飞兰小林田国强刘钰龙周宝山中国石油川庆钻探工程有限公司长庆固井公司陕西西安710016 中国石油川庆钻探工程有限公司钻采工程技术研究院陕西西安710018

ISHPINgO区块位于厄瓜多尔Oriente盆地东部,属于中高孔、高渗边底水油藏。该区块生产套管固井具有地层流体防窜难度大、井壁泥饼难以清除、油层顶界离上层套管脚近、环空间隙窄、井斜大等难点;固井结束后4~5 d进行投产,对井筒完整性要... 详细信息

ISHPINgO区块位于厄瓜多尔Oriente盆地东部,属于中高孔、高渗边底水油藏。该区块生产套管固井具有地层流体防窜难度大、井壁泥饼难以清除、油层顶界离上层套管脚近、环空间隙窄、井斜大等难点;固井结束后4~5 d进行投产,对井筒完整性要求较高。针对前期产层段固井质量问题,通过引入触变剂、胶乳、优选膨胀剂、优化水泥浆性能等措施调配出适合该区块的产层套管水泥浆,该水泥浆具有静胶凝早期强度高、发展快、过渡时间短、抗压强度高、微膨胀等特性;同时,使用多效前置液体系、旋转水泥头、旋转浮鞋等固井工艺,形成适合ISHPINgO区块的配套固井工艺,2022年在ISHPINgO区块完成6井次产层套管固井作业,固井质量合格率100%,全井段优质率85%以上4口井。该固井方案可有效解决ISHPINgO区块产层段固井质量问题,确保井筒完整性,满足后续射孔、开采要求,对缩短建井周期和类似产层套管固井作业具有重要意义。

关键词： ISHPINgO区块产层套管固井强触变胶乳水泥浆高孔高渗

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致密油藏大排量注水吞吐技术及参数优化研究

油气藏评价与开发 2024年第5期14卷 727-733页

作者：张益宁崇如陈亚舟姬玉龙赵立阳王爱方黄晶晶于凯怡西安石油大学陕西省油气井及储层渗流与岩石力学重点实验室陕西西安710065 新疆亚新煤层气一五六勘查有限责任公司新疆乌鲁木齐841100 中国石油长庆油田分公司第三采油厂宁夏银川750000 中国石油长庆油田分公司第四采油厂陕西靖边718599

针对致密油藏水平井自然渗吸采收率低和长期衰竭开发后期地层能量如何补充的难题,在储层基本特征、致密油藏注水吞吐采油机理的基础上,提出了大排量水平井注水吞吐。以鄂尔多斯盆地长7段致密油藏为研究对象,选取天然岩心和人造岩心相结... 详细信息

针对致密油藏水平井自然渗吸采收率低和长期衰竭开发后期地层能量如何补充的难题,在储层基本特征、致密油藏注水吞吐采油机理的基础上,提出了大排量水平井注水吞吐。以鄂尔多斯盆地长7段致密油藏为研究对象,选取天然岩心和人造岩心相结合方式,利用核磁共振等方法,通过室内注水吞吐实验研究了自然渗吸和不同注水速度下吞吐动态渗吸的作用范围和微观孔隙动用特征,分析了排量对孔隙动用情况的影响,并开展了焖井时间影响实验,最后利用数值模拟方法对压裂水平井注水吞吐开发的注水量、焖井时间参数进行优化。研究表明:小排量时,注水吞吐主要动用的是大孔隙,中小孔隙动用较低;大排量时,注水吞吐不仅动用了大孔隙,且中小孔隙动用明显提高,使得整体的采收率出现较大增加。随着焖井时间的延长,油水置换作用越充分,使得注水吞吐采出程度越高,但其提高的程度逐渐稳定。对A9井进行数值模拟优化,得到最佳日注水量为900 m^(3),最佳焖井时间为24 d,在矿场试验取得成功,初期日增油2.11 t,有效期365 d,累计增油770 t。

关键词：大排量注水吞吐致密油藏水平井核磁共振数值模拟

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针刺疗法的力学基础

应用数学和力学 2024年第6期45卷 803-822页

作者：季恒谭为康巫桐雨舒文雅吴啸亚晓旭纪昌春王欣君韩玉龙南京航空航天大学航空航天结构力学及控制全国重点实验室南京210016 南京纯白矩阵科技有限公司南京210000 首都医科大学附属北京中医医院北京100010 陕西省中医医院西安710003 南京中医药大学针药结合教育部重点实验室南京210023

针刺疗法的有效性已被大量研究证实,许多国家将其纳入医疗系统.但是,针刺疗法的发展仍存在一些挑战,如针刺过程定量化方法缺乏、针刺技术传承困难、穴位定位精确度不足等.随着近年来多学科交叉的发展,尤其是工程科学与医学的结合,为解... 详细信息

针刺疗法的有效性已被大量研究证实,许多国家将其纳入医疗系统.但是,针刺疗法的发展仍存在一些挑战,如针刺过程定量化方法缺乏、针刺技术传承困难、穴位定位精确度不足等.随着近年来多学科交叉的发展,尤其是工程科学与医学的结合,为解决针刺技术中存在的问题提供了新的思路和方法.该文综述了针刺技术中力学核心要素的历史发展,包括力学刺激工具(针具)、针刺过程(刺入及行针阶段)和力学刺激对象(穴位)三个部分.通过对这三个力学要素的剖析,总结了其对针刺过程和治疗效果的定量化研究及影响.同时,梳理了在针刺量化研究中的力学实验及模型,深化了对针刺过程的理解.总结了针刺机器人前沿的研究成果,及其在提升针刺技术传承、推动针灸国际化进程中的作用.最后,展望了针刺力学研究的发展方向.

关键词：针刺力学力学刺激核心要素针刺力学模型针刺机器人

Metal-to-ligand charge transfer chirality-based sensing of mercury ions

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Photonics Research 2021年第2期9卷 213-221页

作者： xiONgBIN WANg QIUSHI WANg yulong CHEN JIAgEN LI RUIKUN PAN xi.g CHENg KAR WEI Ng xi ZHU TINgCHAO HE JIAJI CHENg ZIKANg TANg RUI CHEN Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeTaipaMacao 999078China Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055China School of Materials Science and Engineering Hubei UniversityWuhan 430062China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Shenzhen Institute of Artificial Intelligence and Robotics for Society(AIRS) Shenzhen 518172China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China

Chiral ligand conjugated transition metal oxide nanoparticles(NPs) are a promising platform for chiral recognition, biochemical sensing, and chiroptics. Herein, we present chirality-based strategy for effective sensing of mercury ions via ligand-induced chirality derived from metal-to-ligand charge transfer(MLCT) effects. The ligand competition effect between molybdenum and heavy metal ions such as mercury is designated to be essential for MLCT chirality. With this know-how, mercury ions, which have a larger stability constant(Kf) than molybdenum, can be selectively identified and quantified with a limit of detection(LOD) of 0.08 and 0.12 nmol/L for D-cysteine and L-cysteine(Cys) capped Mo O2 NPs. Such chiral chemical sensing nanosystems would be an ideal prototype for biochemical sensing with a significant impact on the field of biosensing, biological systems,and water research-based nanotoxicology.

关键词： mercury molybdenum charge

Piezoresistive pressure sensor with high sensitivity for medical application using peninsula-island structure

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Frontiers of Mechanical Engineering 2017年第4期12卷 546-553页

作者： Tingzhong XU Hongyan WANg Yong xiA Zhiming ZHAO Mimi HUANg Jiuhong WANg Libo ZHAO yulong ZHAO Zhuangde JIANg State Key Laboratory for Manufacmring Systems Engineering Interna-tional Joint Laboratory for Micro/Nano Manufacturing and Measure-ment Technologies Collaborative Innovation Center of Suzhou NanoScience and Technology School of Mechanical Engineering Xi'an Jiaotong University Xi'an 710049 China School of Mechanical and Manufacturing Engineering University ofNew South Wales Sydney NSW 2052 Australia Shaanxi Institute of Metrology Science Xi'an 710065 China

Abstract A novel micro-electromechanical systems piezoresistive pressure sensor with a diagonally positioned peninsula-island structure has high sensitivity for ultra- low-pressure measurement. The pressure sensor was designed with a working range of 0-500 Pa and had a high sensitivity of 0.06 mV-V^-1-Pa-1. The trade-off between high sensitivity and linearity was alleviated. Moreover, the influence of the installation angle on the sensing chip output was analyzed, and an application experiment of the sensor was conducted using the built pipettor test platform. Findings indicated that the proposed pressure sensor had sufficient resolution ability and accuracy to detect the pressure variation in the pipettor chamber. Therefore, the proposed pressure sensor has strong potential for medical equipment application.

关键词： MEMS low pressure sensor peninsula-island ultra-high sensitivity medical application