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Stress distribution in third subsidence belt

Yan Zhitao,Liu Jianzhong,Qiu Jinping,Jin Lihua

Strategic Study of CAE 2009, Volume 11, Issue 2, Pages 33-35

Abstract: subsidence belt is presented , with great amounts of data on hydraulic fracture orientation obtained from monitoringhydraulic fracturing , and the direction of the maximum principle stress is specified .The monitoring data implies that the tectonic stress direction in third subsidence belt is the combined

Keywords： hydraulic fracturing monitoring with micro- seismics third subsidence belt direction of maximumprinciplestress hydraulic fracturing treatment

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Recent advances in micro- and nano-machining technologies

Shang GAO, Han HUANG

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1, Pages 18-32 doi: 10.1007/s11465-017-0410-9

Abstract: The miniaturization of devices in different fields requires production of micro- and nano-scale componentsThis paper reviewed the recent advances in micro- and nano-machining technologies, including micro-cutting, micro-electrical-discharge machining, laser micro-machining, and focused ion beam machining.

Keywords： micro machining cutting electro discharge machining (EDM) laser machining focused ion beam (FIB)

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Occurrence and distribution of micro- and mesoplastics in the high-latitude nature reserve, northern

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1534-7

Abstract:

• The first study on micro(meso)plastics (MMPs) in the Liaohe River

Keywords： Microplastics Mesoplastics Water Sediment Characteristic Risk Assessment

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Strengthening of polysulfone membranes using hybrid mixtures of micro- and nano-scale modifiers

Peyman P. Selakjani, Majid Peyravi, Mohsen Jahanshahi, Hamzeh Hoseinpour, Ali S. Rad, Soodabeh Khalili

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1, Pages 174-183 doi: 10.1007/s11705-017-1670-y

Abstract: Polysulfone (PSf) membranes were modified by either a new organic modifier (sulfonated poly(ether sulfide sulfone), SPESS) or a traditional modifier (rice hulk). These membranes were further reinforced with either multi-walled carbon nanotubes (MWCNTs) or silica nanoparticles. Having a dye rejection of 98.46%, the reinforced membranes increased more than 50% in strength but no change in solution flux was observed. The morphological and roughness studies were conducted using scanning electron microscopy and atomic force microscopy. Moreover, the PSF membranes were also characterized by differential scanning calorimetry. Modifying the membranes with organic modifier or nanofiller increases the glass transition temperature ( ). The highest and strength were observed for the PSf-SPESS-MWCNT membrane. SPESS decreases surface roughness but MWCNT increases roughness on the nanoscale. All membranes show a bimodal pore size distribution, whereas the PSf-SPESS-MWCNT membrane exhibits a relatively uniform distribution of macroscopic and microscopic pores.

Keywords： polysulfone membrane mechanical properties micro- and nano-modification binary and ternary system dye

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Microseismic monitoring technology

Tang Chunhua,Gu Guangqing

Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 95-99

Abstract:

Microseismic (MS) monitoring is a hot topic in the applied geophysicsoptimal sensors, array design, digital-signal processing, event location, velocity calibration, and monitoring

Keywords： microseismic monitoring hydraulic fracturing oil and natural gas SNR (signal to noise ratio) event

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Monitoring and Analyzing on Fracturing Fracture from Horizontal Well

Liu Jianzhong,Zhang Chuanxu,Zhao Yanbo,Jiang Yushuang,Song Jianxing

Strategic Study of CAE 2008, Volume 10, Issue 4, Pages 60-64

Abstract: The microseism monitoring of man-made fracture can understand the shape and orientation of fracturing

Keywords： horizontal well fracturing fracture microseism monitor

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Microseismic monitoring technology development direction and application

Liu Jianzhong,Tang Chunhua,Zuo Jianjun

Strategic Study of CAE 2013, Volume 15, Issue 10, Pages 54-58

Abstract:

This paper discussed the development direction of microseismic monitoringtechnology, pointed out that improve the quality of microseismic monitoring system, reduce the front, and increase the number of microseismic monitoring stations so as to obtain more information that canAbove are important directions of microseismic monitoring technology development.and safety prediction of mine, reservoir besides oilfield fracturing and water monitoring.

Keywords： microseismic monitoring seismic prospecting fracturing monitoring water monitoring

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Porous silica synthesis out of coal fly ash with no residue generation and complete silicon separation

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1712-2

Abstract:

● Both amorphous and crystalline silicon are completely separated from coal fly ash.

Keywords： Coal fly ash Alkali fusion Micro-/meso-porous Si Zeolite MCM-48 Crystalline transformation

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Magnetic Helical Micro- and Nanorobots: Toward Their Biomedical Applications Review

Famin Qiu, Bradley J. Nelson

Engineering 2015, Volume 1, Issue 1, Pages 21-26 doi: 10.15302/J-ENG-2015005

Abstract:

Magnetic helical micro- and nanorobots can perform 3D navigation in various liquids with a sub-micrometerSince magnetic fields with low strengths are harmless to cells and tissues, magnetic helical micro/nanorobotsThis review provides general information on magnetic helical micro/nanorobots, including their fabrication

Keywords： magnetic helical micro/nanorobots mobile micro/nanorobots artificial bacterial flagella (ABFs) functionalization

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Microseismic fracturing mapping and fracturing of open-hole long horizontal Well Su 75-70-6H

Wang Wanxun,Ye Lianchi,Wang Lizhi,Duan Zhengzhong

Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 4-7

Abstract:

Well Su 75-70-6H is the largest open hole horizontal well fracturingMicroseismic monitoring shows whether fractures are generated, locations and patterns of fractures, andfurther provides a guide for fracturing operations; monitoring can also identify location of possiblefracturing fluid leakage, provide early warning of sand blocking and help evaluate the effectivenessmonitoring accuratly reflect the operation process, as well as guide it.

Keywords： fracturing microseismic monitoring fracture

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Analysis of using microseismic monitoring to verify fracturing and waterflood on reservoir Chang 8 of

Wang Guoshun,Liu Jianzhong,Liu Linwang

Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 40-44

Abstract: text-align: justify;">This paper describes arrival time of microseismic signals, which were obtained from monitoringfracturing and waterfloodand were used to interpolate mechanisms of micro-earthquake and verify reliabilityof fracturing and waterflood monitoring.orientation, waterflood front geometry, and microseismic mechanism nodal plane are consistent, and monitoringverify dependability of microseismic mapping itself, and it is an important measurement method for fracturing

Keywords： microseismic fracture waterflood performance waterflood front

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Resent progress of non-quenched and tempered steel for automotive sheet

Chen Yunbo,Ma Mingtu and Wang Guodong

Strategic Study of CAE 2014, Volume 16, Issue 2, Pages 4-17

Abstract: research processes are presented，which include strengthening equation，solid solubility product equation of micro

Keywords： non- quenched and tempered steel development and application micro- alloying strengthen principle

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Experimental study on slurry-induced fracturing during shield tunneling

Teng WANG, Dajun YUAN, Dalong JIN, Xinggao LI

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2, Pages 333-345 doi: 10.1007/s11709-021-0718-8

Abstract: Hydraulic fracturing may occur and cause a significant decrease in the support pressure if the slurryPreventing the occurrence of hydraulic fracturing in a slurry shield requires investigating the effectsof related influencing factors on the hydraulic fracturing pressure and fracture pattern.In this study, a hydraulic fracturing apparatus was developed to test the slurry-induced fracturing ofThe unconfined compressive strength of soil can reflect its ability to resist fracturing failure.

Keywords： slurry shield tunneling hydraulic fracturing test fracturing pressure fracture dip unconfined compressive

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Hydraulic fracturing pressure of concentric double-layered cylinder in cohesive soil

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 937-947 doi: 10.1007/s11709-021-0754-4

Abstract: First, an analytical solution for fracturing pressure in two different concentric regions of soil wasThen, several triaxial hydraulic fracturing tests were carried out to validate the analytical solutionFirst, there is a linear relationship between the fracturing pressure and confining pressure in concentricthe internal-layer soil is softer than the external-layer soil, the presence of internal soil on the fracturingMoreover, the influence of strength distinction between the two layers on the fracturing pressure is

Keywords： hydraulic fracturing pressure layered cavity expansion theory triaxial fracturing test cohesive soil

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Application of artificial fracturing for low permeable reservoir in Xianhe region

Xiao Shuming,Lv Zhiqiang,Guo Zhihua,Liu Xueqing

Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 65-69

Abstract: the characteristics of low permeability and small porosity of high pressure low permeable reservoir, fracturingSince 2008, 79 fracturing mapping have been performed successfully in Xianhe region, which offers great

Keywords： fracturing mapping low permeability hydraulic fracturing