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Artificial lift equipment repairing techniques in Daqing Oilfield

He LIU, Guochen SHI, Cui WANG, Peijing SHI, Yi XU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1, Pages 111-117 doi: 10.1007/s11465-009-0081-2

Abstract: After years of study, a series of repairing techniques for artificial lift equipment have been createdbenefits and efficiency as well.This paper first presents the background of artificial lift equipment repairingtechnique in Daqing Oilfield.Then, a detailed introduction is given about the development history and current situation of key repairingmilitary territory remanufacturing technology, this paper analyzes the situation of artificial lift repairing

Keywords： artificial lift equipment repairing technique remanufacturing technique Daqing Oilfield

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static and dynamic structural performance of segmental pre-stressed concrete box girder bridge after repairing

Ali Fadhil NASER, Zonglin WANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2, Pages 164-177 doi: 10.1007/s11709-013-0196-8

Abstract: The objectives of this study are to explain the repairing and strengthening methods which are used todynamic responses after strengthening, and to evaluate the performance of the bridge structure after repairingThe methods of repairing and strengthening include reconstruction the deck of the bridge by casting 10

Keywords： structural performance steel plates external pre-stressing cracks grouting method static

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Applications of interdependent networks theory in the schedule management of warship level repairing

Qin Haibo,Jin Jiashan and Chen Yanqiao

Strategic Study of CAE 2015, Volume 17, Issue 5, Pages 90-95

Abstract: interdependent networks theory were briefly introduced，the multi-network characteristics in ship level repairingwere explained，with the professional repairing networks，the repairing link networks and the managementThe repairing networks，the equipment purchasing networks，the loading and moving networks and the technicalmethodological support for analyzing and finding weak links in the schedule management of ship level repairing，which means a lot to improving work intensity of ship level repairing and ensuring the ship level repairing

Keywords： interdependent networks；ship；level repairing；program management

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General modeling and optimization technique for real-world earth observation satellite scheduling

Frontiers of Engineering Management Pages 695-709 doi: 10.1007/s42524-023-0263-3

Abstract: This study proposes a general modeling and optimization technique for common and real-world EOS schedulingIn this technique, a framework that decouples the modeling, constraints, and optimization of EOS schedulingFor simplified EOS scheduling problems, the proposed technique shows better performance in applicabilityconstrained real-world benchmark exampled by a four-EOS Chinese commercial constellation is provided, and the technique

Keywords： earth observation satellite scheduling general technique optimization algorithm commercial constellation

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Research of Constructing Technique Supporting System of Agriculture Informationization

Guo Shupu,Zhang Liping,Shen Jichang,Dong Wei

Strategic Study of CAE 2005, Volume 7, Issue 9, Pages 89-94

Abstract:

The agriculture informationization is supported by related information technique.quickening the construction of agriculture informationization are to manage the research of the preservation techniqueof agriculture information, develop agriculture information application technique and build the network

Keywords： agriculture informationization technique supporting system information preservation technique informationapplication technique information spreading network

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The electrostatic-alloy bonding technique used in MEMS

WANG Wei, CHEN Wei-ping

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 2, Pages 238-241 doi: 10.1007/s11465-006-0011-5

Abstract: Electrostatic-alloy bonding of silicon wafer with glass deposited by Au to form Si/Au-glass water, and bonding of Si/Au-glass with silicon wafer were researched during fabrication of pressure sensors. The silicon wafer and glass wafer with an Au film resistor were bonded by electrostatic bonding, and then Si-Au alloy bonding was formed by annealing at 400vH for 2 h. The air sealability of the cavity after bonding was finally tested using the N filling method. The results indicate that large bond strength was obtained at the bonding interface. This process was used in fabricating a pressure sensor with a sandwich structure. The results indicate that the sensor presented better performances and that the bonding techniques can be used in MEMS packaging.

Keywords： Si/Au-glass strength MEMS packaging process sandwich structure

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Seismic safety evaluation methodology for masonry building and retrofitting using splint and bandage technique

Pravin Kumar Venkat Rao PADALU; Yogendra SINGH

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 4, Pages 478-505 doi: 10.1007/s11709-022-0817-1

Abstract: To safeguard the URM wall piers under lateral loads, a retrofitting technique is adopted by providingcapacity of unsafe URM piers can be enhanced up to 3.67 times and made safe using the applied retrofitting technique

Keywords： seismic in-plane and out-of-plane forces pier analysis finite element modelling splint and bandage technique

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Significance of using isolated footing technique for residential construction on expansive soils

Harry FAR,Deacon FLINT

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 1, Pages 123-129 doi: 10.1007/s11709-016-0372-8

Abstract: Expansive soils cause problems with the founding of lightly loaded structures in many parts of the world. Foundation design for expansive soils is one of the most discussed and problematic issues in Australia as expansive soils were responsible for billions of dollars’ worth of damage to man-made structures such as buildings and roads. Several studies and reports indicate that one of the most common and least recognized problems causing severe structural damage to houses lies in expansive soils. In this study, a critical review has been carried out on the current Australian standards for building on expansive soils and they are compared with some techniques that are not included in the current Australian standards for residential slabs and footings. Based on the results of this review, the most effective and economical method has been proposed for construction of footings on all site classifications without restriction to 75mm of characteristic movement. In addition, it has become apparent that as design procedures for footings resting on sites with extreme characteristic movements are not included in the current Australian standards, there is a strong need for well-developed and simplified standard design procedures for characteristic soil movement of greater than 75mm to be included into the Australian Standards.

Keywords： expansive soils residential slabs isolated footings Australian Standards

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Knife-edge technique for laser cooling

WANG Zhanshan, MA Shanshan, MA Yan, ZHAO Min, LIU Hengbiao

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4, Pages 468-473 doi: 10.1007/s11465-007-0081-z

Abstract: In the application of knife-edge technique, the temperature of atoms through laser cooling was measuredKnife-edge technique can measure the temperature of an atomic beam through laser cooling.

Keywords： knife-edge technique uniformity coupled transfer fluorescent

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The Development of Oversea Hydroelectric Technique

Chen Zongliang

Strategic Study of CAE 2002, Volume 4, Issue 4, Pages 86-92

Abstract:

The development of oversea technique for construction of hydroelectric engineering is briefly describedSome important aspects on oversea hydroelectric technique, including the physical exploration, high dams

Keywords： hydropower new oversea technique development

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The Application of Biological Technique in Scientific Research of Sheep Husbandry

Liu Shouren

Strategic Study of CAE 2001, Volume 3, Issue 7, Pages 37-41

Abstract:

In the article, the application of biological technique in the scientific research of sheep husbandryThe application of biological technique not only improves the level of sheep breeding and production,scientific research and production in sheep husbandry by the development and maturation of biological technique

Keywords： biological technique sheep husbandry

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New technique of precision necking for long tubes with variable wall thickness

Yongqiang GUO, Chunguo XU, Jingtao HAN, Zhengyu WANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4, Pages 622-630 doi: 10.1007/s11465-019-0565-7

Abstract: This study analyzed the deformation law of rear axles with variable wall thickness under bidirectional horizontal extrusion and found that necking was accompanied by upsetting deformation through theoretical calculation, numerical simulation, and experimental research. The sequence and occurrence of necking and upsetting deformations were obtained. A theory of deformation was proposed by controlling the distribution of temperature field. Effective processes to control the wall thickness of rear axle at different positions were also proposed. The ultimate limit deformation with a necking coefficient of 0.68 could be achieved using the temperature gradient coefficient. A new technology of two-step heating and two-step extrusion for a 13 t rear axle was developed, qualified test samples were obtained, and suggestions for further industrial application were put forward.

Keywords： extrusion rear axle necking coefficient temperature gradient

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Manufacturing technique and performance of functionally graded concrete segment in shield tunnel

Baoguo MA, Dinghua ZOU, Li XU

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1, Pages 101-104 doi: 10.1007/s11709-009-0011-8

Abstract: Its key manufacturing technique was proposed and its performance was tested.

Keywords： shield tunnel functionally graded concrete segment (FGCS) manufacturing technology performance

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Study of operation optimization based on data mining technique in power plants

LI Jianqiang, LIU Jizhen, GU Junjie, NIU Chenglin

Frontiers in Energy 2007, Volume 1, Issue 4, Pages 457-462 doi: 10.1007/s11708-007-0067-1

Abstract: The determination of operation optimization value is very important for economic analysis and operation optimization in power plants. The operation optimization value determined by traditional methods usually cannot reflect the ac

Keywords： traditional optimization determination economic analysis important

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Digital microfluidics: A promising technique for biochemical applications

He WANG, Liguo CHEN, Lining SUN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 4, Pages 510-525 doi: 10.1007/s11465-017-0460-z

Abstract:

Digital microfluidics (DMF) is a versatile microfluidics technology that has significant application potential in the areas of automation and miniaturization. In DMF, discrete droplets containing samples and reagents are controlled to implement a series of operations via electrowetting-on-dielectric. This process works by applying electrical potentials to an array of electrodes coated with a hydrophobic dielectric layer. Unlike microchannels, DMF facilitates precise control over multiple reaction processes without using complex pump, microvalve, and tubing networks. DMF also presents other distinct features, such as portability, less sample consumption, shorter chemical reaction time, flexibility, and easier combination with other technology types. Due to its unique advantages, DMF has been applied to a broad range of fields (e.g., chemistry, biology, medicine, and environment). This study reviews the basic principles of droplet actuation, configuration design, and fabrication of the DMF device, as well as discusses the latest progress in DMF from the biochemistry perspective.

Keywords： digital microfluidics electrowetting on dielectric discrete droplet biochemistry