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| 1 | TDD-net: a tiny defect detection network for printed circuit boards显示文摘Tiny defect detection (TDD) which aims to perform the quality control of printed circuit boards (PCBs) is a basic and essential task in the production of most electronic products. Though significant progress has been made in PCB defect detection, traditional methods are still difficult to cope with the complex and diverse PCBs. To deal with these problems, this article proposes a tiny defect detection network (TDD-Net) to improve performance for PCB defect detection. In this method, the inherent multi-scale and pyramidal hierarchies of deep convolutional networks are exploited to construct feature pyramids. Compared with existing approaches, the TDD-Net has three novel changes. First, reasonable anchors are designed by using k-means clustering. Second, TDD-Net strengthens the relationship of feature maps from different levels and benefits from low-level structural information, which is suitable for tiny defect detection. Finally, considering the small and imbalance dataset, online hard example mining is adopted in the whole training phase in order to improve the quality of region-of-interest (ROI) proposals and make more effective use of data information. Quantitative results on the PCB defect dataset show that the proposed method has better portability and can achieve 98.90% mAP, which outperforms the state-of-arts. The code will be publicly available. | Runwei Ding Linhui Dai Guangpeng Li Hong Liu | 2019 | CAAI Transactions on Intelligence Technology2019，4，2： | 27 |
| 2 | Recovery of gold from hydrometallurgical leaching solution of electronic waste via spontaneous reduction by polyaniline显示文摘The present study is primarily designed to develop an environmentally-benign approach for the recovery of precious metals, especially gold, from the ever increasingly-discarded electronic wastes(e-waste). By coupling the metal reduction process with an increase in the intrinsic oxidation state of the aniline polymers, and the subsequent re-protonation and reduction of the intrinsically oxidized polymer to the protonated emeraldine(EM) salt, polyaniline(PANi) films and polyaniline coated cotton fibers are able to recover metallic gold from acid/halide leaching solutions of electronic wastes spontaneously and sustainably. The current technique, which does not require the use of extensive extracting reagents or external energy input, can recover as much as 90% of gold from the leaching acidic solutions. The regeneration of polyaniline after gold recovery, as confirmed by the X-ray photoelectron spectroscopy measurements, promises the continuous operation using the current approach. The as-recovered elemental gold can be further concentrated and purified by incineration in air. | Yuanzhao Wu Qingming Fang Xiaohui Yi Gang Liu Runwei Li | 2017 | Progress in Natural Science:Materials International2017，27，4： | 1 |
| 3 | Modeling Tracer Flow Characteristics in Different Types of Pores: Visualization and Mathematical Modeling显示文摘Structure of porous media and fluid distribution in rocks can significantly affect the transport characteristics during the process of microscale tracer flow.To clarify the effect of micro heterogeneity on aqueous tracer transport,this paper demonstrates microscopic experiments at pore level and proposes an improved mathematical model for tracer transport.The visualization results show a faster tracer movement into movable water than it into bound water,and quicker occupancy in flowing pores than in storage pores caused by the difference of tracer velocity.Moreover,the proposed mathematical model includes the effects of bound water and flowing porosity by applying interstitial flow velocity expression.The new model also distinguishes flowing and storage pores,accounting for different tracer transport mechanisms(dispersion,diffusion and adsorption)in different types of pores.The resulting analytical solution better matches with tracer production data than the standard model.The residual sum of squares(RSS)from the new model is 0.0005,which is 100 times smaller than the RSS from the standard model.The sensitivity analysis indicates that the dispersion coefficient and flowing porosity shows a negative correlation with the tracer breakthrough time and the increasing slope,whereas the superficial velocity and bound water saturation show a positive correlation. | Tongjing Liu Weixia Liu Pengxiang Diwu Gaixing Hu TingXu Yuqi Li Zhenjiang You Runwei Qiao Jia Wang | 2020 | Computer Modeling in Engineering & Sciences2020，，6： | 1 |
| 4 | Synthesis and Characterization of Cu Decorated Zeolite A@Void@Et-PMO Nanocomposites for Removal of Methylene Blue by a Heterogeneous Fenton Reaction显示文摘Hydrothermal synthesized nano zeolite A has been encapsulated with ethyl bridged periodic mesoporous organosilica(Et-PMO) shell tlirougli a simple modified Stober method and an organosilane-directed growth-induced etching strategy, the obtained yolk-shell structured A@Et-PMO nanocomposite(YS-A@Et-PMO) was further functionalized by the impregnation of copper ions, realizing the composite material with hierarchical porous and catalytic properties. The morphology and metal content of the Cu/A and Cu/YS-A@Et-PMO were fully characterized. As compared to tlie parent material, the composite Cu/YS-A@Et-PMO has an efficient adsorption and catalytic degradation performance on methylene blue(MB), the removal efficiency reached as high as 95% of 60 mg/L MB within 10 min. These novel structured porous composites may have great potential application for the removal of organic dye including waste effluents. | LI Xiayu ZENG Shangjing QU Xuejian DAI Jinyu LIU Xiaofang WANG Runwei ZHANG Zongtao QIU Shilun | 2019 | Chemical Research in Chinese Universities2019，35，3： | 1 |
| 5 | Flexible magnetic thin films and devices显示文摘Flexible electronic devices are highly attractive for a variety of applications such as flexible circuit boards, solar cells, paper-like displays, and sensitive skin, due to their stretchable, biocompatible, light-weight,portable, and low cost properties. Due to magnetic devices being important parts of electronic devices, it is essential to study the magnetic properties of magnetic thin films and devices fabricated on flexible substrates. In this review, we mainly introduce the recent progress in flexible magnetic thin films and devices, including the study on the stress-dependent magnetic properties of magnetic thin films and devices, and controlling the properties of flexible magnetic films by stress-related multi-fields, and the design and fabrication of flexible magnetic devices. | Ping Sheng Baomin Wang Runwei Li | 2018 | Journal of Semiconductors2018，39，1： | 1 |
| 6 | Enhanced bioavailability and biosafety of cannabidiol nanomicelles for effective anti-inflammatory therapy显示文摘Cannabidiol(CBD)shows great anti-inflammatory potential;however,the hydrophobicity and strong first-pass effect of CBD leads to its extremely low oral bioavailability.Poloxamer 407(P407)is a tri-block copolymer composed of(poly)ethylene oxide(PEO)and(poly)propylene oxide(PPO)sections.It has a PEO-PPO-PEO structure,which is widely used in the preparation of drug delivery systems that are highly biocompatible.When it reaches a certain concentration in water,P407 can self-assemble into a micelle structure containing a hydrophobic core and a hydrophilic shell.A potential approach to enhanc-ing the oral bioavailability of hydrophobic drugs incorporating them into the hydrophilic carrier.We prepared CBD nanomicelles with a drug loading of 14.29%by a cosolvent evaporation method using P407 with appropriate antioxidants.Cell experiments indicated that anti-inflammatory markers(IL-4 and IL-10)increased,while inflammatory markers(TNF-αand IL-6)decreased.Moreover,animal experiments showed that inflammatory cells were inhibited by CBD nanomicelles,and the anti-inflammatory effect of micelles was better than that of CBD,while no obvious evidence indicated toxicity to the liver and kidney. | Yuan Rao Runwei Li Saixing Liu Linchao Meng Qilin Wu Qipeng Yuan Hao Liang Meng Qin | 2022 | Particuology2022，20，10： | 0 |
| 7 | Achieving a high magnetization in sub-nanostructured magnetite films by spin-flipping of tetrahedral Fe3. cations显示文摘Magnetite Fe304 (ferrite) has attracted considerable interest for its exceptional physical properties: It is predicted to be a semimetallic ferromagnetic with a high Curie temperature, it displays a metal-insulator transition, and has potential oxide-electronics applications. Here, we fabricate a high-magnetization (〉 1 Tesla) high-resistance (-0.1 Ωcm) sub-nanostructured (grain size 〈 3 nm) Fe304 film via grain-size control and nano-engineering. We report a new phenomenon of spin- flipping of the valence-spin tetrahedral FeB* in the sub-nanostructured Fe304 film, which produces the high magnetization. Using soft X-ray magnetic circular dichroism and soft X-ray absorption, both at the Fe L3,2- and O K-edges, and supported by first-principles and charge-transfer multiple calculations, we observe an anomalous enhancement of double exchange, accompanied by a suppression of the superexchange interactions because of the spin-flipping mechanism via oxygen at the grain boundaries. Our result may open avenues for developing spin- manipulated giant magnetic Fe304-based compounds via nano-grain size control. | Tun Seng Herng Wen Xiao Sock Mui Poh Feizhou He Ronny Sutarto Xiaojian Zhu Runwei Li Xinmao Yin Caozheng Diao Yang Yang Xuelian Huang Xiaojiang Yu Yuan Ping Feng AndrivoRusydi Jun Ding | 2015 | Nano Research2015，8，9： | 0 |
| 8 | Single-cell analyses identify anaphase-promoting complex subunit 11 as a switch controlling neuronal differentiation of glioblastoma cells显示文摘Glioblastoma(GBM)is the most common and lethal malignancy in the central nervous system.1 One of the major difficulties in treatment is that the initial clinical diagnosis of GBM is already WHO grade IV,without recognizable lower-grade precursor lesions.Copy number variations(CNVs)were found to appear in malignant cells several years before the initial diagnosis of GBM.2 Less differentiation and more aggressive phenotypes were observed in GBM cells with a higher degree of CNVs.3 Additionally,CNVs provide more accurate stratification of clinical outcomes than does the WHO grade system.4 Therefore,we reasoned that differentially expressed genes(DEGs)among GBM cells with different CNV statuses would be significant for the aggressiveness of GBM.Here we leveraged the single-cell RNA-sequencing(scRNA-seq)to construct the CNV profile of GBM at single-cell resolution,divided GBM cells into different clusters according to their CNV statuses,and investigated the molecular functions of DEGs among GBM clusters.Through a series of experiments,we identified anaphase-promoting complex subunit 11(ANAPC11)as a switch controlling the neuronal differentiation of GBM cells,providing a novel alternative for the development of differentiation-inducing therapy to overcome GBM. | Runwei Yang Ziyu Wang Songtao Qi Bowen Ni Jinglin Guo Kaishu Li Haimin Song Sidi Xie Yunxiao Zhang Xirang Wang Chunmao He Guanglong Huang Yawei Liu | 2023 | Genes & Diseases2023，10，5： | 0 |
| 9 | Enhancing direct-path relative transfer function using deep neural network for robust sound source localization显示文摘This article proposes a deep neural network(DNN)-based direct-path relative transfer function(DP-RTF)enhancement method for robust direction of arrival(DOA)estimation in noisy and reverberant environments.The DP-RTF refers to the ratio between the directpath acoustic transfer functions of the two microphone channels.First,the complex-value DP-RTF is decomposed into the inter-channel intensity difference,and sinusoidal functions of the inter-channel phase difference in the time-frequency domain.Then,the decomposed DP-RTF features from a series of temporal context frames are utilized to train a DNN model,which maps the DP-RTF features contaminated by noise and reverberation to the clean ones,and meanwhile provides a time-frequency(TF)weight to indicate the reliability of the mapping.The DP-RTF enhancement network can help to enhance the DP-RTF against noise and reverberation.Finally,the DOA of a sound source can be estimated by integrating the weighted matching between the enhanced DP-RTF features and the DP-RTF templates.Experimental results on simulated data show the superiority of the proposed DP-RTF enhancement network for estimating the DOA of the sound source in the environments with various levels of noise and reverberation. | Bing Yang Runwei Ding Yutong Ban Xiaofei Li Hong Liu | 2022 | CAAI Transactions on Intelligence Technology2022，7，3： | 0 |
| 10 | Functionalized Hierarchical ZSM-5 Zeolites for the Viscosity Reduction of Heavy Oil at Low Temperature显示文摘Herein,we propose a novel approach to reduce the viscosity of heavy oil by functional hierarchical CTMS-ZSM-5-PTMS zeolites.CTMS-ZSM-5-PTMS zeolites synthesized by asymmetric modification and selective alkali etching can reduce the viscosity of heavy oil through adsorbing asphaltenes.This method can reduce the viscosity of heavy oil from hundreds of thousands mPa·s to about ten thousand mPa·s.The work provides an economical and environmentally friendly candidate for heavy oil viscosity reduction under low-temperature conditions. | XIAO Peiwen LI Hui WANG Pingmei LIU Bolun JING Wendan HE Lipeng WANG Runwei HAN Xue ZHANG Zongtao QIU Shilun LUO Jianhui | 2022 | Chemical Research in Chinese Universities2022，38，4： | 0 |
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