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Characterization of random stress fields obtained from polycrystalline aggregate calculations using multi-scale

Bruno SUDRET,Hung Xuan DANG,Marc BERVEILLER,Asmahana ZEGHADI,Thierry YALAMAS

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 2,   Pages 121-140 doi: 10.1007/s11709-015-0290-1

Abstract: The spatial variability of stress fields resulting from polycrystalline aggregate calculations involvingBased on a set of finite element polycrystalline aggregate calculations the properties of the maximal

Keywords： polycrystalline aggregates     crystal plasticity     random fields     spatial variability     correlation structure    

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Sub-nanometer finishing of polycrystalline tin by inductively coupled plasma-assisted cutting

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0751-5

Abstract: Polycrystalline tin is an ideal excitation material for extreme ultraviolet light sources.However, the existence of grain boundary (GB) limits the surface roughness of polycrystalline tin afterinductively coupled plasma (ICP)-assisted cutting was developed for the sub-nanometer finishing of polycrystallineThe effects of large-thermal-gradient ICP treatment on the microstructure of polycrystalline tin wereICP processing for 3.0 s, corresponding to the temperature gradient of 0.30 K/µm, the grain size of polycrystalline

Keywords： plasma-assisted cutting     polycrystalline tin     single-point diamond turning     surface roughness    

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MICROBIAL NECROMASS WITHIN AGGREGATES STABILIZES PHYSICALLY-PROTECTED C RESPONSE TO CROPLAND MANAGEMENT

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 2,   Pages 198-209 doi: 10.15302/J-FASE-2023498

Abstract:

● The contribution of fungal necromass C to SOC increased with aggregate sizes.

Keywords： cropland management     microbial necromass     soil aggregates     soil carbon sequestration     soil organic matter    

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Industrial bio-based plant aggregates as hygric and insulating construction materials for energy efficient

Yunhong Jiang, Mike Lawrence, Meng Zhang, Jiandong Cui

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 10,   Pages 1532-1532 doi: 10.1007/s11705-020-1960-7

Abstract: In this paper, the bulk density, microstructure, porosity and pore size distribution of the selected aggregatesThe scanning electron microscope results showed all the selected aggregates have a highly porous andAll the selected aggregates had a low bulk density ranging from 30 to 130 kg∙m and a high porosity betweenThe thermal conductivity of the selected bio-aggregates ranged from 0.04 to 0.06 W∙m ∙K .The thermal conductivity of the selected aggregates was not only depending on the bulk density of the

Keywords： bio-based aggregates     density     porosity     thermal conductivity     hygric properties    

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Retraction note to: Industrial bio-based plant aggregates as hygric and insulating construction materials

Yunhong Jiang, Mike Lawrence, Meng Zhang, Jiandong Cui

Frontiers of Chemical Science and Engineering doi: 10.1007/s11705-021-2039-9

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Thoughts on the Construction of an Electronic Grade Polycrystalline Silicon Plant with Annual Production

Liang Junwu

Strategic Study of CAE 2000, Volume 2, Issue 6,   Pages 33-35

Abstract:

This paper briefly reviews the electronic grade polysilicon production capacity and market demand in the world as well as in China, It is estimated that in the year of 2000 and 2010 the polysilicon demand in China will be 736 t/a and 1 304 t/a, respectively.

In the recent years, the gross polysilicon production in China is only 80 t/a, so the construction of an electronic grade polysilicon plant in China with a 1 000 t/a production capacity should be resonable. However, referring the newest statistical data since 1997, the world polysilicon production capacity has being exceeded the market demand and the trend will continue in the near future. In order to occupy the domestic polysilicon market the future polysilicon plant will face challenge. The quality of the product and the manufacturing cost are the most important criteria to be considered. Ensuring the polysilicon product purity, the manufacturing cost should be near 20 dollars per kilogram for competition in domestic market.

Keywords： polycrystalline silicon     semiconductor     production    

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Chloride diffusion in concrete with carbonated recycled coarse aggregates under biaxial compression

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 637-648 doi: 10.1007/s11709-023-0902-0

Abstract: concrete structures is affected by the complex stress state inside concrete, and the effect of recycled aggregatesCarbonation enhances the performance of the recycled aggregates and reduces their porosity, thereby reducing

Keywords： recycled concrete     carbonated recycled coarse aggregate     biaxial compression     chloride diffusion     stress level    

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Laboratory assessment of Alaska aggregates using Micro-Deval test

Jenny LIU,Sheng ZHAO,Anthony MULLIN

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 1,   Pages 27-34 doi: 10.1007/s11709-016-0359-5

Abstract: Aggregates suitable for use in asphalt concrete (AC) pavement construction must meet durability criteriaIn Alaska, durability tests currently being used for aggregates in AC pavement include Los Angeles (LAfeasibility of using Micro-Deval test, commonly used in other states, to evaluate the durability of Alaskan aggregateson the testing results, it is found that using Micro-Deval test for durability assessment of Alaska aggregatesLA abrasion and sulfate soundness tests to provide a more desirable durability assessment of Alaska aggregates

Keywords： aggregate durability     Washington degradation test     Micro-Deval test    

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A thermoelectric generator and water-cooling assisted high conversion efficiency polycrystalline silicon

Zekun LIU, Shuang YUAN, Yi YUAN, Guojian LI, Qiang WANG

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 358-366 doi: 10.1007/s11708-020-0712-1

Abstract: Solar energy has been increasing its share in the global energy structure. However, the thermal radiation brought by sunlight will attenuate the efficiency of solar cells. To reduce the temperature of the photovoltaic (PV) cell and improve the utilization efficiency of solar energy, a hybrid system composed of the PV cell, a thermoelectric generator (TEG), and a water-cooled plate (WCP) was manufactured. The WCP cannot only cool the PV cell, but also effectively generate additional electric energy with the TEG using the waste heat of the PV cell. The changes in the efficiency and power density of the hybrid system were obtained by real time monitoring. The thermal and electrical tests were performed at different irradiations and the same experiment temperature of 22°C. At a light intensity of 1000 W/m , the steady-state temperature of the PV cell decreases from 86.8°C to 54.1°C, and the overall efficiency increases from 15.6% to 21.1%. At a light intensity of 800 W/m , the steady-state temperature of the PV cell decreases from 70°C to 45.8°C, and the overall efficiency increases from 9.28% to 12.59%. At a light intensity of 400 W/m , the steady-state temperature of the PV cell decreases from 38.5°C to 31.5°C, and the overall efficiency is approximately 3.8%, basically remain unchanged.

Keywords： photovoltaic (PV)     thermoelectric generator     conversion efficiency     hybrid energy systems     water-cooled plate (WCP)    

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Effects of coarse and fine aggregates on long-term mechanical properties of sea sand recycled aggregate

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 754-772 doi: 10.1007/s11709-021-0711-2

Abstract: Typical effects of coarse and fine aggregates on the long-term properties of sea sand recycled aggregateTwo different types of fine (coarse) aggregates are considered: sea sand and river sand (natural andrecycled coarse aggregates).Generally, the effect of coarse aggregates on the axial deformation of SSRAC is clear; however, the deformation

Keywords： sea sand recycled aggregate concrete     recycled coarse aggregate replacement percentage     sea sand chloride ion content     long-term mechanical properties     stress–strain curve    

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The Production Technology of Electronic Grade Polycrystalline Silicon

Liang Junwu

Strategic Study of CAE 2000, Volume 2, Issue 12,   Pages 34-39

Abstract:

The technology of construction of an electronic grade polycrystalline silicon plant with annual production

Keywords： polysilicon     trichlorosilane method     silane method     flow chart     production    

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Microprofiles of activated sludge aggregates using microelectrodes in completely autotrophic nitrogen

Yongtao LV,Xuan CHEN,Lei WANG,Kai JU,Xiaoqiang CHEN,Rui MIAO,Xudong WANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 390-398 doi: 10.1007/s11783-015-0818-6

Abstract: To quantify the microbial activities inside the sludge aggregates, microprofiles were measured usingIn the outer layer of sludge aggregates (0–700 μm), nitrite-oxidizing bacteria (NOB) showed high activity

Keywords： microelectrodes     CANON     aerobic ammonium-oxidizing bacteria     anaerobic ammonium-oxidizing bacteria     nitrite-oxidizing bacteria    

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Study on micro-texture and skid resistance of aggregate during polishing

Zhenyu QIAN, Lingjian MENG

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3,   Pages 346-352 doi: 10.1007/s11709-017-0409-7

Abstract: In this paper, the optical microscope is used to acquire the surface morphology of three types of aggregates

Keywords： skid resistance of pavement     micro-texture     aggregates     polishing test    

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Ultimate bearing capacity of strip footing resting on clay soil mixed with tire-derived aggregates

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 1016-1024 doi: 10.1007/s11709-021-0751-7

Abstract: This study investigated the use of recycled tire-derived aggregate (TDA) mixed with kaolin as a method of increasing the ultimate bearing capacity ( UBC) of a strip footing. Thirteen 1g physical modeling tests were prepared in a rigid box of 0.6 m × 0.9 m in plan and 0.6 m in height. During sample preparation, 0%, 20%, 40%, or 60% (by weight) of powdery, shredded, small-sized granular (G 1–4 mm) or large-sized granular (G 5–8 mm) TDA was mixed with the kaolin. A strip footing was then placed on the stabilized kaolin and was caused to fail under stress-controlled conditions to determine the UBC. A rigorous 3D finite element analysis was developed in Optum G-3 to determine the UBC values based on the experimental test results. The experimental results showed that, except for the 20% powdery TDA, the TDA showed an increase in the UBC of the strip footing. When kaolin mixed with 20% G (5–8 mm), the UBC showed a threefold increase over that for the unreinforced case. The test with 20% G (1–4 mm) recorded the highest subgrade modulus. It was observed that the UBC calculated using finite element modeling overestimated the experimental UBC by an average of 9%.

Keywords： kaolin     physical modeling tests     stabilization     numerical modeling    

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Destructive and non-destructive evaluation of concrete for optimum sand to aggregate volume ratio

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1400-1414 doi: 10.1007/s11709-021-0779-8

Abstract: Aggregates are the biggest contributor to concrete volume and are a crucial parameter in dictating its

Keywords： aggregates     non-destructive testing     sand-to-aggregate volume ratio (s/a)     maximum aggregate    

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Title Author Date Type Operation

Characterization of random stress fields obtained from polycrystalline aggregate calculations using multi-scale

Bruno SUDRET,Hung Xuan DANG,Marc BERVEILLER,Asmahana ZEGHADI,Thierry YALAMAS

Journal Article

Sub-nanometer finishing of polycrystalline tin by inductively coupled plasma-assisted cutting

Journal Article

MICROBIAL NECROMASS WITHIN AGGREGATES STABILIZES PHYSICALLY-PROTECTED C RESPONSE TO CROPLAND MANAGEMENT

Journal Article

Industrial bio-based plant aggregates as hygric and insulating construction materials for energy efficient

Yunhong Jiang, Mike Lawrence, Meng Zhang, Jiandong Cui

Journal Article

Retraction note to: Industrial bio-based plant aggregates as hygric and insulating construction materials

Yunhong Jiang, Mike Lawrence, Meng Zhang, Jiandong Cui

Journal Article

Thoughts on the Construction of an Electronic Grade Polycrystalline Silicon Plant with Annual Production

Liang Junwu

Journal Article

Chloride diffusion in concrete with carbonated recycled coarse aggregates under biaxial compression

Journal Article

Laboratory assessment of Alaska aggregates using Micro-Deval test

Jenny LIU,Sheng ZHAO,Anthony MULLIN

Journal Article

A thermoelectric generator and water-cooling assisted high conversion efficiency polycrystalline silicon

Zekun LIU, Shuang YUAN, Yi YUAN, Guojian LI, Qiang WANG

Journal Article

Effects of coarse and fine aggregates on long-term mechanical properties of sea sand recycled aggregate

Journal Article

The Production Technology of Electronic Grade Polycrystalline Silicon

Liang Junwu

Journal Article

Microprofiles of activated sludge aggregates using microelectrodes in completely autotrophic nitrogen

Yongtao LV,Xuan CHEN,Lei WANG,Kai JU,Xiaoqiang CHEN,Rui MIAO,Xudong WANG

Journal Article

Study on micro-texture and skid resistance of aggregate during polishing

Zhenyu QIAN, Lingjian MENG

Journal Article

Ultimate bearing capacity of strip footing resting on clay soil mixed with tire-derived aggregates

Journal Article

Destructive and non-destructive evaluation of concrete for optimum sand to aggregate volume ratio

Journal Article