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Not Retrieving the Bygones, Pursuing the Coming

Qin Boyi

Strategic Study of CAE 2002, Volume 4, Issue 12, Pages 34-39

Abstract: “Times of prosperity during the reign of Emperors Kangxi and Qianlong” signified “thedevelopment of science and technology reflecting the advanced productive forces, therefore, “timesof danger” and “last years” followed as soon as the “times of prosperity&rdquo

Keywords： bourgeois revolution “times of prosperity during Kanxi and Qianlong” historical direction of revolution

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For the Prosperity of the Motherland and the Development of the Society

徐匡迪

Strategic Study of CAE 2004, Volume 6, Issue 7, Pages 1-3

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Applicability of high dimensional model representation correlations for ignition delay times of n-heptane

Wang LIU, Jiabo ZHANG, Zhen HUANG, Dong HAN

Frontiers in Energy 2019, Volume 13, Issue 2, Pages 367-376 doi: 10.1007/s11708-018-0584-9

Abstract: It is difficult to predict the ignition delay times for fuels with the two-stage ignition tendency becauseA detailed n-heptane chemical mechanism was used to calculate the fuel ignition delay times in the adiabaticBesides, the ignition delay times predicted by both types of correlations were validated against thoseshowed that both correlations had a satisfactory prediction accuracy in general for the ignition delay timesTherefore, it is concluded that HDMR correlations are capable of predicting the ignition delay times

Keywords： ignition delay random sampling high dimensional model representation n-heptane fuel kinetics

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China’s Energy Transition Pathway in a Carbon Neutral Vision Article

Shu Zhang, Wenying Chen

Engineering 2022, Volume 14, Issue 7, Pages 64-76 doi: 10.1016/j.eng.2021.09.004

Abstract: Here, leveraging the highly acclaimed The Integrated MARKAL-EFOM System model of China (China TIMES)consideration, four carbon-neutral scenarios are proposed and compared for different emission peak times

Keywords： Carbon neutrality Energy transition Climate change mitigation China TIMES model Synergistic effects

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Rolling-element bearings in China: From ancient times to the 20th century

Lie SUN,Ang LI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 1, Pages 33-43 doi: 10.1007/s11465-016-0373-2

Abstract:

The development of rolling-element bearings in China has spanned a long period. Based on several typical and important cases, the present article reconstructs the history of rolling-element bearings in China by dividing it into four stages according to the various characteristics of the bearings. The first stage represents the origin of rolling bearings in China, which remains controversial because of several suspected races and cages that were likely the components of bearings more than a millennium ago. At the second stage, a type of simple roller bearing was used for astronomical instruments not later than the 13th century based on clear philological and physical evidence. A similar bearing was also applied to an abridged armillary in the 17th century. Another type of spherical thrust bearings with rolling elements, which is a key component of a traditional Chinese windmill, could support a rotating shaft that moves rotationally and at an angle. At the third stage, the Chinese began studying and using the so-called European-style bearing since the 17th century. Moreover, over the last 100 years, the modern rolling bearing industry was gradually established in China, particularly because of the technology transfer from the Soviet Union in the 1950s. At the fourth stage, the Chinese government initiated the relatively rapid development of bearing technology. The government launched the “bearing movement” from the 1950s to the 1960s to establish the modern bearing industry and to promote rolling bearings as replacement for traditional sliding bearings. Furthermore, a number of large professional factories and institutions in China have continually introduced advanced technology and equipment. At present, these companies and institutions play a significant role in the international bearing industry.

Keywords： bearing movement rolling-element bearing China early rolling bearings technology transfer

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Chinese Academy of Engineering Physics Dedicated to National Prosperity

Strategic Study of CAE 2001, Volume 3, Issue 8, Pages 91-92

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Effect of 2,5-dimethylfuran addition on ignition delay times of n-heptane at high temperatures

Zhenhua GAO, Erjiang HU, Zhaohua XU, Geyuan YIN, Zuohua HUANG

Frontiers in Energy 2019, Volume 13, Issue 3, Pages 464-473 doi: 10.1007/s11708-019-0609-z

Abstract: The experimental observations indicate that the ignition delay times nonlinearly increase with an increasecompetition of small radicals, which primarily leads to the nonlinear increase in the ignition delay times

Keywords： ignition delay time shock tube kinetic model 2 5-dimethylfuran (DMF) n-heptane

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On the Innovative Intellects of the New Times

Gan Ziheng,Jin Youlin

Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 26-34

Abstract: justify;">The paper explains the great importance of the research on the innovative talents of the new times, and explores the connotation of the new times: taking innovation as the age spirit, including In the paper the innovative talents of the new times are divided into four categories: the generalwith up-to-date sense of times, the comprehension of qualities, the advantage of orientations, The paper summarizes the training pattern of innovative talents of the new times and interprets

Keywords： new times innovative talent top innovative talent outstanding innovative talent master talent

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Advancing with the Times, Developing and Innovating-National Defense Science and Technology Industry

Strategic Study of CAE 2002, Volume 4, Issue 5, Pages 93-94

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Enhance the Protection System of Primary Cultivated Land to Promote Sustainable Prosperity of the Chinese

Li Boheng

Strategic Study of CAE 2004, Volume 6, Issue 3, Pages 1-5

Abstract: agricultural land protection system is one of the basic conditions to support sustainable development and prosperity

Keywords： enhance agricultural land protection

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Hydrogen Energy in Shandong: Building on the Momentum and Joining the Trend of Our Times

Wen Ling

Engineering 2021, Volume 7, Issue 6, Pages 726-727 doi: 10.1016/j.eng.2021.04.007

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dispatching rules in a stochastic dynamic job shop manufacturing system with sequence-dependent setup times

Pankaj SHARMA,Ajai JAIN

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 4, Pages 380-389 doi: 10.1007/s11465-014-0315-9

Abstract:

Stochastic dynamic job shop scheduling problem with consideration of sequence-dependent setup timesexperiments are conducted under due date tightness factor of 3, shop utilization percentage of 90 % and setup timesless than processing times.

Keywords： scheduling stochastic dynamic job shop sequence-dependent setup times dispatching rule simulation

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Tailing and Gangue: The Prosperity Resources Be Recycled

Li Zhangda,Zhou Qiulan

Strategic Study of CAE 2004, Volume 6, Issue 9, Pages 20-22

Abstract:

There are 8843 state-owned mines of county level and above in China, 2/3 of which has become aged . There are more than 2000 tailing ponds and 1900 coal gangue hills, which reserve 5000 million tons of tailings and 3800 million tons of gangues respectively. They can become new composite mineral materials with the help of the latest technology. Through geological evaluation and experiment study on 4 model mines the authors provide advices as follows： developing mine wastes as building materials and Si-materials; developing gangues as nonmetal materials; geologically evaluating tailings and developing them rationally.

Keywords： tailing gangue continue resources

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Intermediate HSS bracing members during seismic excitations: modeling, design, and behavior

Madhar HADDAD

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1, Pages 148-162 doi: 10.1007/s11709-016-0375-5

Abstract: Concentric hollow structural section (HSS) bracing members are used frequently in steel framed structural systems to resist seismic excitations. Finite element modeling of the HSS braces that utilizes the true stress-strain curves produces hysteresis responses that are reasonable matches to the experimental response. True stress-strain curves are obtained from coupon tests or stub-column tests while utilizing an exponential function or strain hardening rule with a trial and error procedure to obtain the hysteresis behavior. In the current study, the true stress-strain curves are directly obtained from tests on stub-columns extracted from the full scale HSS bracing members away from the mid-length plastic hinge after cyclic testing. Two experimental tests (Shaback 2001 and Haddad 2004) were used to validate the model. Results indicate that the stress-strain curves for these braces are not unique. A refined damage accumulation model for ultra-low-cycle fatigue is implemented to predict fracture of the brace tests. The refined damage model is then used in the finite element modeling to predict fracture of braces in a chevron braced frame of an eight-storey building subjected to selected ground motions analyzed using OpenSees program. Results indicate that all braces could sustain the selected earthquake records without fracture.

Keywords： HSS FEM stress-strain curves damage model