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1. Conveying performance of drilling tool of auger miner at different strike angles based on discrete element method

Author:
Fu, Lin; Wang, Kai; Hu, Bo; van Xo, Nguyen
Source:
Powder technology 2021 v.378 pp. 202-215
ISSN:
0032-5910
Subject:
equipment performance,   etc   ; drilling; mining;     Show all 3 Subjects
Abstract:
... The effect of strike angle on the conveying performance of drilling tools was studied using the discrete element method for efficient, reliable and economical auger mining. The results show that there are significant differences in volume fill level and power among the rows of drilling rods and drilling heads at any strike angles. It is necessary to take steps in the retreat process to improve the ...
DOI:
10.1016/j.powtec.2020.07.069

2. A model predictive control approach in microgrid considering multi-uncertainty of electric vehicles

Author:
Wu, Chuanshen; Gao, Shan; Liu, Yu; Song, Tiancheng E.; Han, Haiteng
Source:
Renewable energy 2021 v.163 pp. 1385-1396
ISSN:
0960-1481
Subject:
equipment performance,   etc   ; electric vehicles; models; renewable energy sources; uncertainty;     Show all 5 Subjects
Abstract:
... Managing uncertainty is key to enhancing robustness in microgrids. This study focuses on the uncertainties in aggregated electric vehicles (EVs) and establishes a two-layer model predictive control (MPC) strategy for charging EVs with a microgrid. The uncertainty in sampling results of EV connection times to the microgrid and the uncertainty in sampling results of state of charge (SOC) of each EV ...
DOI:
10.1016/j.renene.2020.08.137

3. Effect of cylinder vortex stabilizer on separator performance of the Stairmand cyclone

Author:
Duan, Jihai; Gao, Shun; Hou, Chenguang; Wang, Weiwen; Zhang, Pan; Li, Chaojie
Source:
Powder technology 2020 v.372 pp. 305-316
ISSN:
0032-5910
Subject:
equipment performance,   etc   ; separation; separators;     Show all 3 Subjects
Abstract:
... The phenomena of precessing vortex core (PVC), entrainment of particles from the ash hopper, and swing of the vortex end in swirling flow have a negative effect on flow field and separation performance of cyclone. In order to alleviate these negative effects, a strategy to improve flow structure by installing cylinder vortex stabilizer is proposed, and the effects of different size stabilizers on ...
DOI:
10.1016/j.powtec.2020.06.031

4. Probe and Control of the Tiny Amounts of Dopants in BHJ Film Enable Higher Performance of Polymer Solar Cells

Author:
Chen, Zhenyu; Tang, Yabing; Lin, Baojun; Zhao, Hanzhang; Li, Tao; Min, Tai; Yan, Han; Ma, Wei
Source:
ACS applied materials & interfaces 2020 v.12 no.22 pp. 25115-25124
ISSN:
1944-8252
Subject:
equipment performance,   etc   ; polymers; solar cells;     Show all 3 Subjects
Abstract:
... To achieve efficient doping in polymer solar cells (PSCs), the dopant needs to be selectively located in the binary components of a bulk heterojunction (BHJ) film according to its polarity. The rarely studied n-type dopant is thoroughly examined in a simplified planar heterojunction (PHJ) device to address its favored location in the active layer. Results show that the n-dopant distribution in the ...
DOI:
10.1021/acsami.0c06127

5. A mixed hole transport material employing a highly planar conjugated molecule for efficient and stable perovskite solar cells

Author:
Ji, Xiaofei; Zhou, Tong; Ke, Xin; Wang, Wenxuan; Wu, Shanyu; Zhang, Mingtao; Lu, Di; Zhang, Xiaodan; Liu, Yongsheng
Source:
Journal of materials chemistry A 2020 v.8 no.10 pp. 5163-5170
ISSN:
2050-7496
Subject:
equipment performance,   etc   ; energy; solar cells;     Show all 3 Subjects
Abstract:
... We successfully demonstrated a simple and facile way to improve the efficiency and stability of perovskite solar cells using a mixed hole transport material, which was a composite of spiro-OMeTAD and a conjugated small molecule, DRSBDT-2OT. DRSBDT-2OT, with an acceptor–donor–acceptor (A–D–A) structure, exhibits a high molecular planarity via noncovalent intramolecular S⋯O interactions, leading to ...
DOI:
10.1039/c9ta13365h

6. Mie Resonant Structural Colors

Author:
Baek, Kyungnae; Kim, Youngji; Mohd-Noor, Syazwani; Hyun, Jerome K.
Source:
ACS applied materials & interfaces 2020 v.12 no.5 pp. 5300-5318
ISSN:
1944-8252
Subject:
equipment performance,   etc   ; color; equipment design;     Show all 3 Subjects
Abstract:
... Structural colors refer to colors produced by the interference of light scattered by judiciously arranged nano- or microscopic structures. In this Forum Article, we discuss the use of Mie resonant scattering in structural colors with dielectric and metal–dielectric hybrid structures to achieve notable figures of merit in pixel size and gamut range. Compared with plasmonic structures, resonant diel ...
DOI:
10.1021/acsami.9b16683

7. Experimental research on the separation performance of W-shaped hydrocyclone

Author:
Jiang, Lanyue; Liu, Peikun; Yang, Xinghua; Zhang, Yuekan; Li, Xiaoyu; Zhang, Yulong; Wang, Hui
Source:
Powder technology 2020 v.372 pp. 532-541
ISSN:
0032-5910
Subject:
equipment performance,   etc   ; industrial sites; particle size; separation;     Show all 4 Subjects
Abstract:
... The entrainment of fine particles in underflow of a grinding-classification hydrocyclone can cause ore over-grinding, reducing both the metal recovery and the ball mill throughput. This problem is addressed in this study by proposing a W-shaped hydrocyclone that effectively reduces the fine particle in the underflow. The separation performance of the W-shaped hydrocyclone was investigated in depth ...
DOI:
10.1016/j.powtec.2020.06.047

8. In-phase and out-of-phase pitch and roll oscillations of model wind turbines within uniform arrays

Author:
Fu, Shifeng; Zhang, Buen; Zheng, Yuan; Chamorro, Leonardo P.
Source:
Applied energy 2020 v.269 pp. 114921
ISSN:
0306-2619
Subject:
equipment performance,   etc   ; models; wind power; wind turbines;     Show all 4 Subjects
Abstract:
... We experimentally explored the impact of in-phase and complete out-of-phase pitch and roll oscillations on the mean power output and the structure of the power fluctuations of turbines within 3×2 uniform arrays. The flow past selected configurations was also characterized with hotwire anemometry. The parameter space included combinations of three amplitudes and two frequencies of the turbine oscil ...
DOI:
10.1016/j.apenergy.2020.114921

9. Effects of corona wire distribution on characteristics of electrostatic precipitator

Author:
Wang, Xiaohua
Source:
Powder technology 2020 v.366 pp. 36-42
ISSN:
0032-5910
Subject:
equipment performance,   etc   ; electric field; equipment; powders;     Show all 4 Subjects
Abstract:
... The effects of corona wire distribution on characteristics of electrostatic precipitators were numerically studied. The electric field, charge density and removal efficiency were discussed at various Sww/Swₚ (ratio of wire-wire length to wire-plate length). The electric field and charge density had an oscillating distribution on the collecting plates. With the decrease of Sww/Swₚ, the electric fie ...
DOI:
10.1016/j.powtec.2020.02.044

10. Comparing methods for improving spark-ignited engine efficiency: Over-expansion with multi-link cranktrain and high compression ratio with late intake valve closing

Author:
Yang, Zhuyong; Miganakallu, Niranjan; Miller, Tyler; Worm, Jeremy; Naber, Jeffrey; Roth, David
Source:
Applied energy 2020 v.262 pp. 114560
ISSN:
0306-2619
Subject:
equipment performance,   etc   ; engines; equipment design; geometry; models;     Show all 5 Subjects
Abstract:
... A common approach of high efficiency engines is to utilize high compression with late intake valve closing (LIVC) to realize an over-expanded cycle. A multi-link cranktrain can also realize an over-expanded cycle with the same geometric intake displacement as a baseline engine while extending the expansion stroke. These two types of over-expanded cycle engines and a baseline engine are investigate ...
DOI:
10.1016/j.apenergy.2020.114560

11. Excellent Moisture Stability and Efficiency of Inverted All-Inorganic CsPbIBr₂ Perovskite Solar Cells through Molecule Interface Engineering

Author:
Yang, Shuzhang; Wang, Liang; Gao, Liguo; Cao, Junmei; Han, Qianji; Yu, Fengyang; Kamata, Yusuke; Zhang, Chu; Fan, Meiqiang; Wei, Guoying; Ma, Tingli
Source:
ACS applied materials & interfaces 2020 v.12 no.12 pp. 13931-13940
ISSN:
1944-8252
Subject:
equipment performance,   etc   ; energy conversion; halides; solar cells;     Show all 4 Subjects
Abstract:
... All-inorganic lead halide perovskite solar cells (PSCs) have drawn widespread interest because of its excellent thermal stability compared to its organic–inorganic hybrid counterpart. Poor phase stability caused by moisture, however, has thus far limited their commercial application. Herein, by modifying the interface between the hole-transport layer (HTL) and the perovskite light absorption layer ...
DOI:
10.1021/acsami.9b23532

12. A double-choking theory as an explanation of the evolution laws of ejector performance with various operational and geometrical parameters

Author:
Tang, Yongzhi; Liu, Zhongliang; Li, Yanxia; Yang, Nan; Wan, Yangda; Chua, Kian Jon
Source:
Energy conversion and management 2020 v.206 pp. 112499
ISSN:
0196-8904
Subject:
equipment performance,   etc   ; mathematics; mixing; nozzles; quantitative analysis;     Show all 5 Subjects
Abstract:
... There are few systematic studies to investigate the inherent reason behind the evolution law of ejector performance, only some simple qualitative or roundabout analysis. In this paper, a double-choking theory is proposed to provide an in-depth explanation of the evolution laws of ejector performance. The systematic investigation and quantitative analysis focus on the influences of various operatio ...
DOI:
10.1016/j.enconman.2020.112499

13. Experimental investigation on the hydrodynamic performance of a cylindrical dual-chamber Oscillating Water Column device

Author:
Ning, De-zhi; Zhou, Yu; Mayon, Robert; Johanning, Lars
Source:
Applied energy 2020 v.260 pp. 114252
ISSN:
0306-2619
Subject:
equipment performance,   etc   ; equipment design; hydrodynamics; water power;     Show all 4 Subjects
Abstract:
... The hydrodynamic performance of a stationary cylindrical dual-chamber Oscillating Water Column (OWC) wave energy device was experimentally studied to assess conversion efficiency in comparison with a single-chamber OWC. The contribution of the present work is to guide the design and optimization of the dual-chamber OWC device for efficiently capturing offshore wave energy. The effects of various p ...
DOI:
10.1016/j.apenergy.2019.114252

14. Functionalized Organic Material Platform for Realization of Ternary Logic Circuit

Author:
Jeon, Jaeho; Kim, Min Je; Shin, Gicheol; Lee, Myeongjae; Kim, Young Jae; Kim, BongSoo; Lee, Yoonmyung; Cho, Jeong Ho; Lee, Sungjoo
Source:
ACS applied materials & interfaces 2020 v.12 no.5 pp. 6119-6126
ISSN:
1944-8252
Subject:
equipment performance,   etc   ; electrons; equipment design; transistors;     Show all 4 Subjects
Abstract:
... Negative differential resistance/transconductance (NDR/NDT) has been attracting significant attention as a key functionality in the development of multivalued logic (MVL) systems that can overcome the limits of conventional binary logic devices. A high peak-to-valley current ratio (PVCR) and more than double-peak transfer characteristics are required to achieve a stable MVL operation. In this stud ...
DOI:
10.1021/acsami.9b18772

15. Synchronized Switch Harvesting on ElectroMagnetic System: a nonlinear technique for hybrid energy harvesting based on active inductance

Author:
Lallart, Mickaël; Lombardi, Giulia
Source:
Energy conversion and management 2020 v.203 pp. 112135
ISSN:
0196-8904
Subject:
equipment performance,   etc   ; capacitors; diodes; electric potential difference;     Show all 4 Subjects
Abstract:
... This paper proposes a hybrid nonlinear interface combining both piezoelectric and electromagnetic effects for energy harvesting purposes. Based on the previously developed Synchronized Switch Harvesting on Inductor (SSHI) scheme, this technique aims at including as much as electroactive parts as possible, thus advantageously replacing the passive inductance in the SSHI approach by an electromagnet ...
DOI:
10.1016/j.enconman.2019.112135

16. Experimental investigation of floor-attached vortex effects on the pressure pulsation at the bottom of the axial flow pump sump

Author:
Song, Xijie; Liu, Chao
Source:
Renewable energy 2020 v.145 pp. 2327-2336
ISSN:
0960-1481
Subject:
equipment performance,   etc   ; pumps; renewable energy sources;     Show all 3 Subjects
Abstract:
... The influence of the floor-attached vortex on the pressure pulsation at the pump sump was investigated using the experimental analysis, and the theoretical analysis according to the theory of eddy dynamics. When the floor-attached vortex appeared under the large flow rate conditions, the time-domain characteristics curves for the pressure pulsation were significantly disordered and the pressure pu ...
DOI:
10.1016/j.renene.2019.07.125

17. Investigating the resolution capability of terrestrial laser scanners and its impact on the effective number of measurements

Author:
Schmitz, B.; Kuhlmann, H.; Holst, C.
Source:
ISPRS journal of photogrammetry and remote sensing 2020 v.159 pp. 41-52
ISSN:
0924-2716
Subject:
equipment performance,   etc   ; detection limit; lasers; scanners;     Show all 4 Subjects
Abstract:
... The resolution capability of terrestrial laser scanners does not necessarily equal the scanning resolution. Laser scanners can acquire the surrounding with a point distance of less than a millimeter on ten meters but the footprint size amounts to at least a few millimeters. Hence, neighboring laser spots overlap and they are correlated as they do not provide individual information about the object ...
DOI:
10.1016/j.isprsjprs.2019.11.002

18. Retraction: Fabrication of hollow CoS₁.₀₉₇ prisms toward supercapactior performance

Author:
Zhang, Ruili; Yang, Yuntao; Yang, Ping
Source:
RSC advances 2019 v.9 no.38 pp. 22031
ISSN:
2046-2069
Subject:
equipment performance,   etc   ; prisms; synthesis;     Show all 3 Subjects
Abstract:
... Retraction of ‘Fabrication of hollow CoS₁.₀₉₇ prisms toward supercapactior performance’ by Ruili Zhang et al., RSC Adv., 2019, 9, 10814–10819. ...
DOI:
10.1039/c9ra90056j

19. Space quantization between the object and image spaces of a microscopic stereovision system with a stereo light microscope

Author:
Wang, Yuezong; Zhao, Zhizhong
Source:
Micron 2019 v.116 pp. 46-53
ISSN:
0968-4328
Subject:
equipment performance,   etc   ; microscopes; microscopy;     Show all 3 Subjects
Abstract:
... Microscopic stereovision systems with a stereo light microscope have been used for quantized observations and measurements in microscopy fields. These applications depend on a quantization mathematical relationship between the object space and the image space. In this article, a novel, practical space quantization method was proposed. It was derived from two defined base cell matrices. First, it c ...
DOI:
10.1016/j.micron.2018.09.011

20. Optimization of external spray negative-pressure mist-curtain dust suppression devices for roadheaders based on a multi-factor orthogonal experiment

Author:
Peng, Huitian; Nie, Wen; Liu, Zhiqiang; Xiu, Zihao; Yang, Shibo; Xu, Changwei; Ma, Qingxin; Guo, Cheng
Source:
Journal of cleaner production 2020 v.275 pp. 123603
ISSN:
0959-6526
Subject:
equipment performance,   etc   ; dust; dust control; mathematical models; sprayers; spraying;     Show all 6 Subjects
Abstract:
... To improve the dust removal efficiency of external spray negative-pressure mist-curtain dust suppression devices, a multi-factor orthogonal experiment was designed and a numerical simulation was carried out for these types of devices. According to changes in the measurement factor values in the simulation results, the main factors affecting the negative-pressure suction effect of the device were o ...
DOI:
10.1016/j.jclepro.2020.123603