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Online since: June 2014
Authors: Hua Cheng, Wei Jun Hu
Local weak support effect on the stability of surrounding rocks in deep roadway
Weijun Hu 1, a, Hua Cheng 2, b
1Graduate student, School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan, Anhui P.R.
In this roadway, the section deformation phenomenon serious, the old repair plan is only by strengthening the roof support, for the floor just weak support or none support, often repaired and often bad, spent a lot of financial and material resources, but also seriously affect the safe production of the enterprise.
Acknowledgements This work was financially supported by the National Natural Science Foundation (51134012).
Journal of China Coal Society, 1994, 19(4):343-351.
In this roadway, the section deformation phenomenon serious, the old repair plan is only by strengthening the roof support, for the floor just weak support or none support, often repaired and often bad, spent a lot of financial and material resources, but also seriously affect the safe production of the enterprise.
Acknowledgements This work was financially supported by the National Natural Science Foundation (51134012).
Journal of China Coal Society, 1994, 19(4):343-351.
Online since: July 2013
Authors: Chuan Zhang, Dong Hui Zhang, Ying Jun Zhao, Ning Bo Zhao, Dong Hua Lu
Formula 2 depicts the actual location of the nuclear leakage material.
Nuclear Science, 2012, 29 (1): 52-55
Science Press, 2004, 1
Journal of Environmental Radioactivity, 2004, 75:315-327.
Nuclear Science, 2012, 29 (1): 52-55
Science Press, 2004, 1
Journal of Environmental Radioactivity, 2004, 75:315-327.
Online since: July 2019
Authors: Tanemasa Asano, Akihiro Ikeda, Daisuke Nakamura, Kaname Imokawa, Kento Okamoto, Toshifumi Kikuchi, Hiroshi Ikenoue
High-Concentration, Low-Temperature, and Low-Cost Excimer Laser Doping for 4H-SiC Power Device Fabrication
Kaname Imokawa1,2, Toshifumi Kikuchi1,2, Kento Okamoto1,
Daisuke Nakamura1, Akihiro Ikeda3, Tanemasa Asano1
and Hiroshi Ikenoue1, 2 a*
1Graduate School of Information Science and Electrical Engineering, Kyushu Univ.
2Department of Gigaphoton Next GLP, Kyushu Univ.
1,2744 Motooka Nishi-ku Fukuoka 819-0395, Japan
3Department of Computer and Information Sciences, Sojo Univ.
4-22-1 Ikeda, Nishi-ku, Kumamoto 860-0082, Japan
ah.ikenoue.834@m.kyushu-u.ac.jp
Keywords: 4H-SiC, Al thin film, excimer laser doping, pn junction diode
Abstract.
(a) Schematic of the KrF excimer laser irradiation system and (b) image of laser irradiation to SiC. 4H-SiC is a semiconductor with a wide band-gap of 3.26 eV, and it is known as a power device material with high-breakdown voltage, high-heat resistance, and low-power consumption.
Kingery, journal of the American Ceramic Society, 65, 2 (1982)
(a) Schematic of the KrF excimer laser irradiation system and (b) image of laser irradiation to SiC. 4H-SiC is a semiconductor with a wide band-gap of 3.26 eV, and it is known as a power device material with high-breakdown voltage, high-heat resistance, and low-power consumption.
Kingery, journal of the American Ceramic Society, 65, 2 (1982)
Online since: September 2013
Authors: Jun Ming Chen, Zhi Sheng Ding, Chun Xia Li, Shi Lin Yan
Reliability-based Balanced Condition for Strengthened RC Beams
Chunxia Li1, a, Zhisheng Ding2,b, SHilin Yan1,c , Junming Chen1,d
1 School of Science, Wuhan University of Technology, Wuhan, Hubei province, PRC
2 Wuhan Gongda Reinforcement Engineering Co., Ltd, Wuhan , Hubei province, PRC
adingli95@126.com, bdingzhsh@126.com, cyanshl@whut.edu.cn, djmchen1@whut.edu.cn
Keywords: balanced condition, reliability indicator, flexure capability, statistical characteristic
Abstract.
Statistical analysisFig.3 Load-strain curve strain[me] load[kN] 0 1000 2000 3000 (a) L3 90 60 30 0 1000 2000 3000 (b) L5 90 60 30 steel CFS 0 1000 2000 3000 (c) L6 100 60 20 0 1000 2000 3000 (d) L8 100 60 20 steel before strengthened steel after strengthened CFS load[kN] strain[me] strain[me] strain[me] load[kN] load[kN] of flexure capability by Monte-Carlo According to the design formula of flexure capability for strengthened beams in the current code [3], the factors influencing the flexure capability are material strength, cross section, steel area, area of CFS as well as the hysteretic strain.
Acknowledgment This research is supported by National Science foundation of PRC (51073125).
Journal of Building Structures, pp.88-91, (2008 S1) (in Chinese)
Statistical analysisFig.3 Load-strain curve strain[me] load[kN] 0 1000 2000 3000 (a) L3 90 60 30 0 1000 2000 3000 (b) L5 90 60 30 steel CFS 0 1000 2000 3000 (c) L6 100 60 20 0 1000 2000 3000 (d) L8 100 60 20 steel before strengthened steel after strengthened CFS load[kN] strain[me] strain[me] strain[me] load[kN] load[kN] of flexure capability by Monte-Carlo According to the design formula of flexure capability for strengthened beams in the current code [3], the factors influencing the flexure capability are material strength, cross section, steel area, area of CFS as well as the hysteretic strain.
Acknowledgment This research is supported by National Science foundation of PRC (51073125).
Journal of Building Structures, pp.88-91, (2008 S1) (in Chinese)
Online since: May 2012
Authors: Min Lan
Post (group)
Organization structure decomposition
Task decomposition
Management resources outside the project
Human resource management center
Material resource management center (capital, equipment and materials)
Subtask
Personnel
External personnel
External resources
Control system
Target system
Target decomposition
start project
Fig. 2 To rebuild all management processes of EPC by the core of post
2.2 Management System Intellectualization
Management system intellectualization is realized through decomposition of post by “agent”.
According to the existing information, the fire is directly caused by inflaming of outer wall insulated materials due to violation of operation regulation by unqualified welding operator.
International Journal of Project Management, 1998(16) [7] Julilo Cesar Martinez.
International Journal of Project Management. 2000 (18),p.307-316 [11] Ruben Vrijhoef, Lauri Koskela.
European Journal of Purchasing & Supply Management. 2000(6),p.169-178 [12] B.P.Rimal, A.Jukan, D.Katsaros, Y.Goeleven.
According to the existing information, the fire is directly caused by inflaming of outer wall insulated materials due to violation of operation regulation by unqualified welding operator.
International Journal of Project Management, 1998(16) [7] Julilo Cesar Martinez.
International Journal of Project Management. 2000 (18),p.307-316 [11] Ruben Vrijhoef, Lauri Koskela.
European Journal of Purchasing & Supply Management. 2000(6),p.169-178 [12] B.P.Rimal, A.Jukan, D.Katsaros, Y.Goeleven.
Online since: May 2016
Authors: Ivan Harvan, Ivan Holly
- Reduced maintenance: the higher quality materials and control used in precast concrete increase durability and reduce the need for maintenance. [3]
Requirements to Connections
Strength - A connection must resist the forces to which is subjected during its lifetime.
Deformation is measured between first yield and ultimate failure of the structural materials used in the connection.
Fire resistance - Connections which may be weakened by exposure to fire should be protected by concrete or grout, enclosed or sprayed with the fire resistance materials.
Cementitious materials such as in-situ mortar, fine concrete or grouting are often used in the joints between load bearing elements in columns and walls as well as for beam and floor elements.
International Journal of Research in Engineering and Technology, No.02, (2015), 767-770
Deformation is measured between first yield and ultimate failure of the structural materials used in the connection.
Fire resistance - Connections which may be weakened by exposure to fire should be protected by concrete or grout, enclosed or sprayed with the fire resistance materials.
Cementitious materials such as in-situ mortar, fine concrete or grouting are often used in the joints between load bearing elements in columns and walls as well as for beam and floor elements.
International Journal of Research in Engineering and Technology, No.02, (2015), 767-770
Online since: June 2013
Authors: Qi Jin Tang, Li Rui Wang, Da Ming Pei
WDS monitoring aims at construction execution, monitors the resources occupy status of WDS, including human resources, material resources and equipment resources 3 aspects.
Data Colleting Based on Nodes.Data colleting is an important function of product management information system, it is the base of material transferring and tracking, and it is the data source of other modules.
(5) Flow of equipment & material: Because block construction needs lots of equipment and materials, so key equipment and material has a direct effect to the execution progress of WDS.
If a sustaining tracking for equipment and material cannot be provided, it will be hard for a WDS to meet the scheduled deadline.
Journal of Jiangsu University of Science and Technology, 2010, 24(1):23-26 [5] ZHANG guangfa, Liu Yujun, JI Zhuoshshang etal.
Data Colleting Based on Nodes.Data colleting is an important function of product management information system, it is the base of material transferring and tracking, and it is the data source of other modules.
(5) Flow of equipment & material: Because block construction needs lots of equipment and materials, so key equipment and material has a direct effect to the execution progress of WDS.
If a sustaining tracking for equipment and material cannot be provided, it will be hard for a WDS to meet the scheduled deadline.
Journal of Jiangsu University of Science and Technology, 2010, 24(1):23-26 [5] ZHANG guangfa, Liu Yujun, JI Zhuoshshang etal.
Online since: June 2008
Authors: Alex M. Glezer, K.E. Inaekyan, Sergey Prokoshkin, Irina Gurtovaya, S. Makushev, I. Khmelevskaya, U. Ugurchiev, S. Manaenkov, Vladimir V. Stolyarov, Andrey Korotitskiy
To
increase the deformability of bulk materials, an electroplastic deformation (EPD) method is applied
when an electropulse action provides stimulation of technological plasticity [5].
[3] Brailovski V., Prokoshkin S.D., Khmelevskaya I.Yu. et al.: Materials Transactions JIM (2006), Vol. 47, p. 795
[4] Prokoshkin S.D., Khmelevskaya I.Yu., Dobatkin S.V., Trubitsyna I.B. et al.: Ultrafine Grained Materials IV.
[5] Troitskiy O.A., Baranov J.V., Avraamov J.S., Shljapin A.D.: Physical bases and technologies of processing of modern materials (the theory, technology, structure and properties), Vol.1, Moscow- Izhevsk, Inst.Comput.
[7] Trubitsyna I.B., Prokoshkin S.D., Korotitskiy A.V. et al.: Journal of Functional Materials (2007), Vol. 1, No.2, p.66.
[3] Brailovski V., Prokoshkin S.D., Khmelevskaya I.Yu. et al.: Materials Transactions JIM (2006), Vol. 47, p. 795
[4] Prokoshkin S.D., Khmelevskaya I.Yu., Dobatkin S.V., Trubitsyna I.B. et al.: Ultrafine Grained Materials IV.
[5] Troitskiy O.A., Baranov J.V., Avraamov J.S., Shljapin A.D.: Physical bases and technologies of processing of modern materials (the theory, technology, structure and properties), Vol.1, Moscow- Izhevsk, Inst.Comput.
[7] Trubitsyna I.B., Prokoshkin S.D., Korotitskiy A.V. et al.: Journal of Functional Materials (2007), Vol. 1, No.2, p.66.
Online since: August 2004
Authors: Young H. Kim, Jae Keun Park, Hoi Keun Lee, Kwang Myong Lee
Experimental Works
Materials and mix proportions.
Acknowledgement The authors wish to acknowledge the financial support of Korea Science and Engineering Foundation (KOSEF).
[2] American Society for Testing and Materials, Test for Pulse Velocity Through Concrete, ASTM-C-597, (1991)
Johnson, Nondestructive evaluation of early-age concrete strength in plate structures by the impact-echo method, ACI Materials Journal, Vol. 52(1986), p. 297-302
Popovics, Analysis of the concrete strength versus ultrasonic pulse velocity relationship, Materials Evaluation, (2001), No. 2, p. 123-130.
Acknowledgement The authors wish to acknowledge the financial support of Korea Science and Engineering Foundation (KOSEF).
[2] American Society for Testing and Materials, Test for Pulse Velocity Through Concrete, ASTM-C-597, (1991)
Johnson, Nondestructive evaluation of early-age concrete strength in plate structures by the impact-echo method, ACI Materials Journal, Vol. 52(1986), p. 297-302
Popovics, Analysis of the concrete strength versus ultrasonic pulse velocity relationship, Materials Evaluation, (2001), No. 2, p. 123-130.
Optical and Electrical Properties of Diamond-Like Carbon Thin Film with Deposition by ECR-CVD System
Online since: July 2019
Authors: Weera Pengchan, Tanawit Srisantirut
Introduction
Over the years, diamond-like thin films, also known as DLC films are of interest to researchers as they have many properties similar to diamonds, such as high mechanical strength, chemical inertness, high optical transmittance and wide energy band. [1] These outstanding features make it a promising material for surface forces like friction, power photovoltaic applications and new electrode materials. [2-3] The core of these properties is that the DLC film consists of a network of sp3 and sp2 coordinates.
Grill, “Diamond-like carbon: state of the art,” Diamond and Related Materials 8, 1999, pp.428-434
Corat, “Adherent Diamond-Like Carbon Coatings on Metals Via PECVD and IBAD,” Brazilian Journal of Physics vol.36, 2006 pp.986-989 [5] F.
Ferrari, “Determination of bonding in diamond-like carbon by Raman spectroscopy,” Diamond and Materials 11, 2002 pp.1053-1061 [10] C.T.
Robertson, “Diamond-like amorphous carbon”, Materials Science and Engineering R37, 2002 pp.129-281 [15] Adliene D, Laurikaitiene J, Kopustinskas V and Meskinis S “Mater Sci Eng 06”, 2008 pp.005
Grill, “Diamond-like carbon: state of the art,” Diamond and Related Materials 8, 1999, pp.428-434
Corat, “Adherent Diamond-Like Carbon Coatings on Metals Via PECVD and IBAD,” Brazilian Journal of Physics vol.36, 2006 pp.986-989 [5] F.
Ferrari, “Determination of bonding in diamond-like carbon by Raman spectroscopy,” Diamond and Materials 11, 2002 pp.1053-1061 [10] C.T.
Robertson, “Diamond-like amorphous carbon”, Materials Science and Engineering R37, 2002 pp.129-281 [15] Adliene D, Laurikaitiene J, Kopustinskas V and Meskinis S “Mater Sci Eng 06”, 2008 pp.005