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| 1 | 3D reconstruction method and connectivity rules of fracture networks generated under different mining layouts显示文摘In current research,a series of triaxial tests,which were employed to simulate three typical mining layouts(i.e.,top-coal caving,non-pillar mining and protected coal seam mining),were conducted on coal by using MTS815 Flex Test GT rock mechanics test system,and the fracture networks in the broken coal samples were qualitatively and quantitatively investigated by employing CT scanning and 3D reconstruction techniques.This work aimed at providing a detail description on the micro-structure and fractureconnectivity characteristics of rupture coal samples under different mining layouts.The results show that:(i)for protected coal seam mining layout,the coal specimens failure is in a compression-shear manner and oppositely,(ii)the tension-shear failure phenomenon is observed for top-coal caving and non-pillar mining layouts.By investigating the connectivity features of the generated fractures in the direction ofσ_1,under different mining layouts,it is found that the connectivity level of the fractures of the samples corresponding to non-pillar mining layout was the highest. | Zhang Ru Ai Ting Li Hegui Zhang Zetian Liu Jianfeng | 2013 | International Journal of Mining Science and Technology2013，23，6： | 18 |
| 2 | A review:Synthesis,modification and photocatalytic applications of ZnIn_(2)S_(4)显示文摘Solar energy is an ideal energy source for solving energy shortages and serious environmental problems.In the past few decades,photocatalytic technology which uses solar energy to deal with the above problems has caused great interest.ZnIn_(2)S_(4),as a layered ternary metal chalcogenide compound,has a series of advantages such as the wide light absorption range and adjustable bandgap.It has been applied in the different fields of photocatalysis in recent years.This review introduced the crystal structures and growth mechanism of ZnIn_(2)S_(4)and summarized the preparation methods of ZnIn_(2)S_(4).Also,the promoted strategies of ZnIn_(2)S_(4)based photocatalytic system and their applications in the pollutant removal,hydrogen evolution,reduction of CO_(2),nitrogen fixation,and chemical synthesis was summarized.Furthermore,the challenges and development directions of the current ZnIn_(2)S_(4)based photocatalytic system were proposed.It is hoped that this review will help researchers design a better ZnIn_(2)S_(4)based photocatalytic system. | Jie Wang Sijia Sun Run Zhou Yangzi Li Zetian He Hao Ding Daimei Chen Weihua Ao | 2021 | Journal of Materials Science & Technology2021，，19： | 6 |
| 3 | Numerical simulation of spatial distributions of mining-induced stress and fracture fields for three coal mining layouts显示文摘In this study, the spatial distributions of stress and fracture fields for three typical underground coal mining layouts, i.e. non-pillar mining(NM), top-coal caving mining(TCM) and protective coal-seam mining(PCM), are modeled using discrete element software UDEC. The numerical results show that different mining layouts can lead to different mining-induced stress fields, resulting in diverse fracture fields. For the PCM, the mining influenced area in front of the mining faces is the largest, and the stress concentration factor in front of the mining faces is the lowest. The spatial shapes of the mining-induced fracture fields under NM, TCM and PCM differ, and they are characterized by trapezoidal, triangular and tower shapes, respectively. The fractal dimensions of mining-induced fractures of the three mining layouts decrease in the order of PCM, TCM and NM. It is also shown that the PCM can result in a better gas control effect in coal mines with high outburst potential. The numerical results are expected to provide a basis for understanding of mining-induced gas seepage fields and provide a reference for highefficiency coal mining. | Shengwei Li Mingzhong Gao Xiaojun Yang Ru Zhang Li Ren Zhaopeng Zhang Guo Li Zetian Zhang Jing Xie | 2018 | Journal of Rock Mechanics and Geotechnical Engineering2018，10，5： | 3 |
| 4 | Scenario-based analysis and probability assessment of sub-synchronous oscillation caused by wind farms with direct-driven wind generators显示文摘Recently, explanations of the sub-synchronous oscillation(SSO) caused by wind farms based on directdriven wind generators(DDWGs) have been published in the literatures, in which the controller parameters of DDWGs and the system equivalent parameters play an important role. However, more than one set of parameters can cause weakly damped sub-synchronous modes. The most vulnerable and highly possible scenario is still unknown. To find scenarios that have potential oscillation risks, this paper proposes a small disturbance model of wind farms with DDWGs connected to the grid using a state-space modeling technique. Taguchi’s orthogonal array testing is introduced to generate different scenarios.Multiple scenarios with different parameter settings that may lead to SSOs are found. A probabilistic analysis method based on the Gaussian mixture model is employed to evaluate the consistency of these scenarios with the actual accidents. Electromagnetic transient simulations are performed to verify the findings. | Zhi AN Chen SHEN Zetian ZHENG Feng LIU Xiaoqing CHANG Wei WEI | 2019 | Journal of Modern Power Systems and Clean Energy2019，7，2： | 3 |
| 5 | Magnetically levitated/piezoelectric/triboelectric hybrid generator as a power supply for the temperature sensor显示文摘The combination of new intelligent materials and structure technology is becoming an effective way in energy havesting and self-powered sensing. In this work, we demonstrate a magnetically levitated/piezoelectric/triboelectric hybrid generator, which does not use complex structure and has high steady output performance. It includes three parts: magnetically levitated generator(MLG), piezoelectric generator(PNG), triboelectric nanogenerator(TENG). The peak power of each is 135 μW, 22 mW and3.6 mW, which are obtained at 1 MΩ, 10 kΩ and 1 kΩ, respectively. The hybrid generator can completely light up light-emitting diodes(LEDs) under the vibration frequency of 20 Hz and the vibration amplitude of 10 mm. It also can charge a 470 μF capacitor.On this basis, we have integrated the hybrid generaor as a power supply into a self-powered tempreature sensing system. The combination of three generators can not only broaden the operating range, but also increase the operating length and sensitivity.This work will extend the application of self-powered sensor in automatic production line and promote the development of industrial control technology. | ZHANG ZengXing HE Jian HAN JianQiang XU HongYan MU JiLiang WEN Tao WANG DaWei TIAN ZhuMei CHEN ZeTian XUE ChenYang | 2017 | Science China(Technological Sciences)2017，60，7： | 3 |
| 6 | AlGaN nanocrystals:building blocks for efficient ultraviolet optoelectronics显示文摘AlGaN nanocrystals have emerged as the building blocks of future optoelectronic devices operating in the ultraviolet(UV) spectral range. In this article, we describe the design and performance characteristics of AlGaN nanocrystal UV light-emitting diodes(LEDs) and surface-emitting UV laser diodes. The selective-area epitaxy and structural, optical, and electrical properties of AlGaN nanocrystals are presented. The recent experimental demonstrations of AlGaN nanocrystal LEDs and laser diodes are also discussed. | XIANHE LIU KISHWAR MASHOOQ DAVID A.LALEYAN ERIC T.REID ZETIAN MI | 2019 | Photonics Research2019，7，6： | 2 |
| 7 | Modeling size-dependent thermo-mechanical behaviors of shape memory polymer Bernoulli-Euler microbeam显示文摘The objective of this paper is to model the size-dependent thermo-mechanical behaviors of a shape memory polymer (SMP) microbeam.Size-dependent constitutive equations,which can capture the size effect of the SMP,are proposed based on the modified couple stress theory (MCST).The deformation energy expression of the SMP microbeam is obtained by employing the proposed size-dependent constitutive equation and Bernoulli-Euler beam theory.An SMP microbeam model,which includes the formulations of deflection,strain,curvature,stress and couple stress,is developed by using the principle of minimum potential energy and the separation of variables together.The sizedependent thermo-mechanical and shape memory behaviors of the SMP microbeam and the influence of the Poisson ratio are numerically investigated according to the developed SMP microbeam model.Results show that the size effects of the SMP microbeam are significant when the dimensionless height is small enough.However,they are too slight to be necessarily considered when the dimensionless height is large enough.The bending flexibility and stress level of the SMP microbeam rise with the increasing dimensionless height,while the couple stress level declines with the increasing dimensionless height.The larger the dimensionless height is,the more obvious the viscous property and shape memory effect of the SMP microbeam are.The Poisson ratio has obvious influence on the size-dependent behaviors of the SMP microbeam.The paper provides a theoretical basis and a quantitatively analyzing tool for the design and analysis of SMP micro-structures in the field of biological medicine,microelectronic devices and micro-electro-mechanical system (MEMS) self-assembling. | Bo ZHOU Xueyao ZHENG Zetian KANG Shifeng XUE | 2019 | Applied Mathematics and Mechanics(English Edition)2019，40，11： | 2 |
| 8 | Growth monitoring of greenhouse lettuce based on a convolutional neural network显示文摘Growth-related traits,such as aboveground biomass and leaf area,are critical indicators to characterize the growth of greenhouse lettuce.Currently,nondestructive methods for estimating growth-related traits are subject to limitations in that the methods are susceptible to noise and heavily rely on manually designed features.In this study,a method for monitoring the growth of greenhouse lettuce was proposed by using digital images and a convolutional neural network(CNN).Taking lettuce images as the input,a CNN model was trained to learn the relationship between images and the corresponding growth-related traits,i.e.,leaf fresh weight(LFW),leaf dry weight(LDW),and leaf area(LA).To compare the results of the CNN model,widely adopted methods were also used.The results showed that the values estimated by CNN had good agreement with the actual measurements,with R^(2) values of 0.8938,0.8910,and 0.9156 and normalized root mean square error(NRMSE)values of 26.00,22.07,and 19.94%,outperforming the compared methods for all three growth-related traits.The obtained results showed that the CNN demonstrated superior estimation performance for the flat-type cultivars of Flandria and Tiberius compared with the curled-type cultivar of Locarno.Generalization tests were conducted by using images of Tiberius from another growing season.The results showed that the CNN was still capable of achieving accurate estimation of the growth-related traits,with R2 values of 0.9277,0.9126,and 0.9251 and NRMSE values of 22.96,37.29,and 27.60%.The results indicated that a CNN with digital images is a robust tool for the monitoring of the growth of greenhouse lettuce. | Lingxian Zhang Zanyu Xu Dan Xu Juncheng Ma Yingyi Chen Zetian Fu | 2020 | Horticulture Research2020，7，1： | 2 |
| 9 | New Diagnostic Systems on HL-2A Tokamak显示文摘 | DING Xuantong ZHOU Yan DENG Zhongchao XIAO Weiwen LIU Zetian SHI Zhongbing YAN Longwen HONG Wenyu YANG Qingwei | 2006 | Southwestern Institute of Physics Annual Report2006，，1： | 1 |
| 10 | The Pellet Enhanced Performance on the HL-2A Tokamak显示文摘 | DING Xuantong YANG Qingwei YAN Longwen ZHU Genliang CAO Zeng XIAO Zhenggui GAO Qingdi LONG Yongxing LIU Dequan LIU Yi ZHOU Yan PAN Yudong CUI Zhengying HUANG Yuan LIU Zetian SHI Zhongbing JI Xiaoquan XIAO Weiwen LIU Yong | 2006 | Southwestern Institute of Physics Annual Report2006，，1： | 1 |
| 11 | From Physical Space to Visual Image Space显示文摘The theoretical framework of visual simulation in virtual reality is discussed. The new concept of visual image space is supposed. On the basis of visual image space, in visual perceptive sense, VR is considered as a spatial simulation. The objective of the spatial simulation is to transform physical space to visual image space. Last, the prototype system, surveying & mapping virtual Reality (SMVR), is developed, and the space simulation above is realized. By use of SMVR, the real 3D representation, 3D visual analysis, virtual plan and designs can be implemented. | YE Zetian LIN Hui LIU Xianlin YE Zetian, Ph.D, Chinese Academy of Surveying and Mapping, 16 Beitaiping Road, Haidian District, Beijing 100039, China. | 2003 | Geo-Spatial Information Science2003，6，2： | 1 |
| 12 | N-polar InGaN nanowires: breaking the efficiency bottleneck of nano and micro LEDs显示文摘The efficiency of conventional quantum well light-emitting diodes(LEDs) decreases drastically with reducing areal size. Here we show that such a critical size scaling issue of LEDs can be addressed by utilizing N-polar In Ga N nanowires. We studied the epitaxy and performance characteristics of N-polar In Ga N nanowire LEDs grown on sapphire substrate by plasma-assisted molecular beam epitaxy. A maximum external quantum efficiency-11% was measured for LEDs with lateral dimensions as small as 750 nm directly on wafer without any packaging. The effect of electron overflow and Auger recombination on the device performance is also studied. This work provides a viable approach for achieving high-efficiency nano and micro LEDs that were not previously possible. | Xianhe Liu Yi Sun Yakshita Malhotra Ayush Pandey Ping Wang Yuanpeng Wu Kai Sun Zetian Mi | 2022 | Photonics Research2022，10，2： | 1 |
| 13 | Design and development of the deep-rock in-situ condition-preserved coring calibration platform显示文摘To systematically validate and calibrate the theory and technology of the deep in-situ conditionpreserved coring, the in-situ conditions at different depths should be simulated, and the full-size coring tests should be carried out in this simulated environment. Therefore, a deep-rock in-situ conditionpreserved coring calibration platform was designed and developed. The self-tightening sealing structure and the quick-disassembly structure were designed on the basis of an innovative segmented nonuniformdiameter structure, which was a breakthrough from the traditional high-pressure vessel frame and was verified by finite element simulation and actual testing under extreme working conditions, respectively.To simulate the actual deep in-situ environment with a temperature of 150℃ and pressure of 140 MPa for a large Φ450 mm×H1400 mm core, temperature and pressure control systems were designed by coupling, and a pre-embedded high-pressure-resistant temperature sensor was designed. Finally, highprecision assembly automation, complex movement coordination of the coring device with the platform,and rotary dynamic sealing were achieved by utilizing the combination of adaptive cabin body servo control and an adaptive mechanical structure in a limited space, laying a solid foundation for the calibration of in-situ condition-preserved coring. | Yihang Li Heping Xie Ru Zhang Zetian Zhang Zhilong Zhang Heng Gao Wei Huang Jixun Zhang Jiming Gao Xin Ma Ruibing Xu | 2023 | International Journal of Mining Science and Technology2023，33，11： | 1 |
| 14 | Fish Expert:a web based expert system for fish disease diagnosis显示文摘 | Daoliang Li Zetian Fu Yanqing Duan | 2002 | Expert System with Application2002，23，3： | 1 |
| 15 | Enhancement of cellular immune function during cold adaptation of BALB/c inbred mice 显示文摘 | Yang Xu Zetian Y Chengzhi S | 1992 | Crybiology1992，29，： | 1 |
| 16 | A text segmentation method of text to speech technology based on agricultural ontology theory and semantic search显示文摘 | Li Xinxing Fu Zetian Zhang Lingxian | 2012 | Journal of Food Agriculture and Environment2012，10，1： | 1 |
| 17 | Development and evaluation on a RFID-based traceability system for cattle/beef quality safety in China显示文摘 | Jianying Feng Zetian Fu Zaiqiong Wang Mark Xu Xiaoshuan Zhang | 2013 | Food Control2013，，2： | 1 |
| 18 | Fish-Expert: a web-based expert system for fish disease diagnosis显示文摘 | Daoliang Li Zetian Fu Yanqing Duan | 2002 | Expert Systems With Applications2002，，3： | 1 |
| 19 | Factors of E-Knowledge Project Success for Rural Development 显示文摘 | Weizhe Feng Yangqing Duan Yan Qi Zetian Fu | 2010 | Sensor Letters2010，，8： | 1 |
| 20 | Electrochemical characterization of YBaCo 3 ZnO 7+ δ as a stable proton-conducting SOFCs cathode显示文摘 | Heng Wang Zetian Tao Wei Liu | 2011 | Ceramics International2011，，2： | 1 |
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