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An approach for machining distortion measurements and evaluation of thin-walled blades with small datum

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Chinese Journal of Aeronautics 2016年第6期29卷 1806-1814页

作者： yu jianhua Chen Zhitong Jiang Zepeng School of Mechanical Engineering and Automation Beihang UniversityBeijing 100083China AVIC Commercial Aircraft Engine Manufacturing Co. Ltd.Shanghai 201306China Co-Innovation Center for Advanced Aero-Engine Beijing 100083China

Inspection techniques for aero-engine blades are a hot topic in industry. Since these blades have a sculptured surface and a small datum, measurement results may deviate from an actual position. There are few proper approaches compensating for non-uniform distribution errors that are within specified tolerance ranges. This study aimed to develop a meshing structure measuring approach for the distortion of blades via non-contact optical 3D scanning. A rough measurement and a registration procedure are initially adopted to rectify the coordinate system of a blade, which avoids the initial coordinate system errors caused by the small datum. A measurement path with meshing structure is then unfolded on the blade surface. For non-uniform distribution errors, the meshing structure measurement is more visual and clear than the traditional constant height curves method. All measuring points take only 7 min to complete, and the distribution of error is directly and accurately presented by the meshing structure. This study provides a basis for future research on distortion control and error compensation.

关键词： Free surface Machining distortion Optical testing Thin-walled workpiece Turbine blades

Preparation and characterization of highly ordered NiO nanowire arrays by sol-gel template method

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Journal of University of Science and Technology Beijing 2006年第2期13卷 169-173页

作者： Mei yu jianhua Liu Songmei Li School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China

Highly ordered nickel monoxide （NiO） nanowire arrays were fabricated by sol-gel synthesis within the pores of anodic alumina membrane （AAM）. Scanning electron microscopy （SEM）, high resolution transmission electron microscopy （HRTEM） and X-ray diffraction （XRD） were used to characterize the topography and crystalloid structure of NiO nanowire arrays. The length and diameter of the NiO nanowires depended on the thickness of the AAM and the diameter of the pores. The results indicated that the NiO nanowires were uniformly assembled into the ordered nanopores of the AAM and paralleled to each other. Nickel monoxide nanotubes were also fabricated with the same method by changing the immersing time. This new method to prepare NiO nanowire arrays may be important from gas sensors to various engineering materials.

关键词： nanowire arrays sol-gel preparation NiO anodic alumina membrane (AAM)

Fabrication and characterization of highly ordered Ni_(0.5)Zn_(0.5)Fe_2O_4 nanowire/tube arrays by sol-gel template method

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Journal of University of Science and Technology Beijing 2007年第5期14卷 469-472页

作者： Mei yu jianhua Liu Songmei Li School of Materials Science and Engineering Beihang University Beijing 100083 China

Highly ordered nanowire/tube arrays of Ni0.5Zn0.5Fe2O4were fabricated by the sol-gel method in the pores of anodic alumina membrane （AAM）. Whether nanowires or nanotubes were fabricated depends on immersion time. The immersion time was 15- 40 s for nanotubes and over 60 s for nanowires. The topography and crystalline structure of the nanowire arrays were characterized by scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, and X-ray diffraction （XRD）. It was found that the length and diameter of the Ni0.5Zn0.5Fe2O4 nanowires are related to the thickness of the AAM and the diameter of the pores. The results indicated that the Ni0.5Zn0.5Fe2O4 nanowires are uniform and parallel to each other.

关键词： anowire/tube arrays anodic alumina membrane (AAM) sol-gel method

Boron and nitrogen co-doped porous carbon derived from sodium alginate enhanced capacitive deionization for water purification

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Frontiers of Chemical Science and Engineering 2023年第12期17卷 2014-2024页

作者： Xiao Yong Pengfei Sha Jinghui Peng Mengdi Liu Qian Zhang jianhua yu Liyan yu Lifeng Dong College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China Department of Physics Hamline UniversitySaint PaulMN 55104USA

Capacitive deionization can alleviate water shortage and water environmental pollution, but performances are greatly determined by the electrochemical and desalination properties of its electrode materials. In this work, B and N co-doped porous carbon with micro-mesoporous structures is derived from sodium alginate by a carbonization, activation, and hydrothermal doping process, which exhibits large specific surface area (2587 m^(2)·g^(‒1)) and high specific capacitance (190.7 F·g^(‒1)) for adsorption of salt ions and heavy metal ions. Furthermore, the materials provide a desalination capacity of 26.9 mg·g−1 at 1.2 V in 500 mg·L^(‒1) NaCl solution as well as a high removal capacity (239.6 mg·g^(‒1)) and adsorption rate (7.99 mg·g^(‒1)·min^(‒1)) for Pb2+ with an excellent cycle stability. This work can pave the way to design low-cost porous carbon with high-performances for removal of salt ions and heavy metal ions.

关键词： capacitance deionization porous carbon B N co-doping heavy metal ions water purification

Embedded integrated servo-controllers for intelligent modular actuators

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High Technology Letters 2006年第1期12卷 37-41页

作者：陈伟海 yu Shouqian Wang jianhua Kou Jinqiao School of Automation Beijing University of Aeronautics and Astronautics Beijing 100083 P.R. China

This paper focuses on the development of an embedded integrated servo-controller （EISC） for servomotors. Comprising of mainly servo-controller and servo-amplifiers, this EISC is capable of controlling a wide range of servomotors to perform complieated tasks. Hence, integration of this EISC with a servomotor forms an intelligent modular actuator （IMA） that is essential to modern manufacturing industries. The development of such an EISC involves two major tasks： first, designing the hardware of a compact-sized and highly compatible EISC, and second, developing the software functions to facilitate its functionalities and capahilities. The developed EISC hence forms an integrated-servo-eontrol module, which determines the capability, functionality, flexibility and responsiveness of these IMAs.

关键词： modular actuatorembedded integrated controller intelligent actuator modular actuatorem

Geochemistry of a Rapakivi Granite Suite in a Proterozoic Rift Trough in Beijing and Its Vicinity

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Acta Geologica Sinica(English Edition) 1991年第2期65卷 169-186页

作者： yu jianhua Fu Huiqin Zhang Fenglan Guan Meisheng Beijing Centre of Geological Research and Laboratory Fei Zhenbi Beijing Centre of Geological Research and Laboratory

Controlled by E-W-trending faults, a Proterozoic (1.4-1.8 Ga old) rapakivi granite suite was intruded inBeijing and the area to its east (within Hebei Province), forming three parallel belts of igneous rocks. Theisotopic, trace element and rare earth element geochemical data of a bimodal rock association made up ofanorthosite, gabbro and alkali basalt and olivine-bearing quartz-syenite, rapakivi granite and trachyte as wellas potassic A-type granites and anorogenic granites—— all suggest that there exists an incipient rift in thestudy area. Fractional crystallization of a mixed magma formed by the magma derived from the upper mantleand the magma derived by small degrees of fusion of the lower crust produced anorthosite cumulates. Thewater-deficient granitic magma was differentiated into a subalkaline series. When the fractional crystallizationwas incomplete, rhythmic eruptions took place.

关键词： Geochemistry of a Rapakivi Granite Suite in a Proterozoic Rift Trough in Beijing and Its Vicinity

Geological characteristics and metallogenic prospect of marine volcanic rock-type copper deposits in eastern Kunlun Mountains area, Xinjiang

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Chinese Journal Of Geochemistry 2011年第4期30卷 531-538页

作者： HAN Hongwei WANG He MU Lunxun WEI Yong ZHI Jianhong yu jianhua WEI Mengyuan Key Laboratory of Mineral and Mineralization Guangzhou Institute of Geochemistry Chinese Academy of Sciencess Guangzhou510640 China Graduate University of Chinese Academy of Sciences Beijing 10049 China Xinjiang Xin Di Geological Exploration Co. Ltd. Urumuqi 830000 China NO. 3 Geologicaly Party Xinjiang Bureau of Geology and Mineral Resource Exploration and Development Korla 841000 China

The Katelixi Cu-Zn deposit is a marine volcanic rock-type copper deposit discovered for the first time in the Tokuzidaban Group in eastern Kunlun Mountains area. It is hosted in the Lower Carboniferous Tokuzidaban Group volcanic strata. The orebodies are obviously controlled by the strata and their ore-bearing rocks are a suite of greyish-green mafic tuffs, generally parallel-stratiform, stratoid and lenticular in form, occurring in limestone as well as in the contact between limestone and carbon-bearing siltstone. This ore deposit possesses distinct characteristics of marine volcanic rock sedimentaion. The geological, petrochemical and REE characteristics of its occurrence pro-vide strong evidence suggesting that this deposit is of marine volcanic rock sedimention origin, basically identical to those of some typical marine volcanic rock-type copper deposits in Xinjiang and other parts of China. Marine vol-canic rocks are well developed in the Lower Carboniferous Tokuzidaban strata in eastern Kunlun Mountains area. In addition to this deposit, we have also found a number of copper polymetallic ore deposits or occurrences in associa-tion with marine volcanc activities in many places where there is a good metallogenic prospect. A breakthrough in the understanding of ore prospecting and genesis has not only filled up the gap in prospecting this type of ore depos-its in this area, but also is of great significance in directing exploration of this type of ore deposits in this area.

关键词：火山岩型地质特征成矿前景东昆仑海洋山地铜矿新疆

Clinical Study on Respiratory Medicine Treatment of Chronic Obstructive Pulmonary Disease Combined with Respiratory Failure

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Journal of Clinical and Nursing Research 2024年第5期8卷 293-298页

作者： jianhua yu Sanshandao Street Community Health Service Center Laizhou CityYantai 261418Shandong ProvinceChina

Objective:To explore the respiratory medicine treatment methods for treating chronic obstructive pulmonary disease(COPD)combined with respiratory ***:70 cases of COPD patients with combined respiratory failure admitted to our hospital from January 2021 to January 2023 were selected as the study subjects,and randomly divided into the control group and the experimental group,each with 35 *** control group received only conventional treatment,and the experimental group received non-invasive positive pressure ventilation,and the treatment effects and changes in the levels of IL-18,hs-CRP,and CES2 inflammatory factors were observed and evaluated in the two ***:There was no significant difference between the general data of the two groups(P>0.05);after treatment,the total effective rate of clinical efficacy of the observation group(91.43%)was significantly higher than that of the control group(71.43%),and the difference showed a significant correlation(P<0.05);after treatment,the level of inflammatory factor of the observation group was significantly reduced compared with that of the control group,and the difference showed a highly significant correlation(P<0.001).Conclusion:The non-invasive positive pressure ventilation treatment program significantly improves the therapeutic effect,effectively controls the level of inflammatory factors,and improves the health status of patients when dealing with patients with chronic obstructive pulmonary disease accompanied by respiratory failure,showing a good clinical application prospect.

关键词： Chronic obstructive pulmonary disease Respiratory failure Non-invasive positive pressure ventilation Therapeutic effect Inflammatory factor

Recent advances and remaining challenges in lung cancer therapy

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Chinese Medical Journal 2024年第5期137卷 533-546页

作者： Tasha Barr Shoubao Ma Zhixin Li jianhua yu Department of Hematology and Hematopoietic Cell Transplantation City of Hope National Medical CenterLos AngelesCalifornia 91010USA Comprehensive Cancer Center City of HopeLos AngelesCalifornia 91010USA Department of Immuno-Oncology Beckman Research InstituteLos AngelesCalifornia 91010USA

Lung cancer remains the most common cause of cancer *** the continued research into new drugs and combination therapies,outcomes in lung cancer have been improved,and clinical benefits have been expanded to a broader patient ***,the overall cure and survival rates for lung cancer patients remain low,especially in metastatic *** the available lung cancer treatment options,such as surgery,radiation therapy,chemotherapy,targeted therapies,and alternative therapies,immunotherapy has shown to be the most *** exponential progress in immuno-oncology research and recent advancements made in the field of immunotherapy will further increase the survival and quality of life for lung cancer *** progress has been made in targeted therapies using tyrosine kinase inhibitors and monoclonal antibody immune checkpoint inhibitors with many US Food And Drug Administration(FDA)-approved drugs targeting the programmed cell death ligand-1 protein(e.g.,durvalumab,atezolizumab),the programmed cell death-1 receptor(e.g.,nivolumab,pembrolizumab),and cytotoxic T-lymphocyte-associated antigen 4(e.g.,tremelimumab,ipilimumab).Cytokines,cancer vaccines,adoptive T cell therapies,and Natural killer cell mono-and combinational therapies are rapidly being studied,yet to date,there are currently none that are FDA-approved for the treatment of lung *** this review,we discuss the current lung cancer therapies with an emphasis on immunotherapy,including the challenges for future research and clinical applications.

关键词： Lung cancer Therapy Immunotherapy Combination therapy Adoptive T cell therapies