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| 1 | Combined and interactive effects of interference fit and preloads on composite joints显示文摘The combined and interactive effects of the bolt-hole fit conditions and the preloads of the fasteners on the load carrying capacity of single-lap composite-to-titanium bolted joints have been investigated both experimentally and numerically. Quasi-static tests of the hybrid joints with different fit conditions are implemented, and a three dimensional finite element progressive failure analysis model is proposed to predict the influences of the bolt-hole fit conditions and fastener's preloads on the mechanical behaviors of the joints. Based on the experimental validated simulation method, a multi-factor, mixed levels orthogonal design table and the analysis of variance method are used to arrange the simulation conditions and to further study the interactive effects of preloads and fit conditions. Through the analysis of the results, for the researched double bolt, single-lap composite-titanium joints, it is found that: the effects of both the interference fit and the preloads change from positive into negative mode with the increase of the interference fit values or preload values; appropriate bolt-hole fit conditions and preloads can improve the bolt-hole contact conditions of the loaded joints, and then retard the fiber failures around the fastener holes, and increase the load carrying capacity of the joints eventually; the interactive effect of the bolt-hole interference fit conditions and preloads cannot be ignored and the parameters need to be considered together and synthetically as the joints are being optimized. | Liu Longquan Zhang Junqi Chen Kunkun Wang Hai | 2014 | Chinese Journal of Aeronautics2014，27，3： | 13 |
| 2 | Three dimensional velocity structure and accurate earthquake location in Changning–Gongxian area of southeast Sichuan显示文摘In order to understand the crustal structure and tectonic background of the Changning–Gongxiang area, southeastern Sichuan Province, where a series of moderate-to-strong earthquakes occurred in recent years, we utilized the seismic phase data both from a local dense array and from the regional seismic networks;we used the tomoDD program to invert for the high-resolution three-dimensional velocity structure within the depth range of 0–10 km and for accurate hypocentral locations in this area. We analyzed the seismogenic structures for the events of Xingwen M5.7 in 2018 and Gongxian M5.3 and Changning M6.0 in 2019. The results show that:(1) widespread lateral inhomogeneity exists in the velocity structure of the study area, and the location of the velocity anomaly is largely consistent with known structures. In the range of distinguishable depth, the inhomogeneity decreases with increasing depth, and the velocity structure anomalies in some areas are continuous in depth;(2) earthquakes occurred in clusters, showing the characteristics of zonal folding trends in the NW-SE and NE-SW directions;the focal depth in the area is generally shallow in both the sedimentary cap and the crystalline basement. The seismogenic structures of small earthquake clusters are different in size and occurrence in different sections, and the clusters occurred mostly in regions with high P-or S-wave velocities;(3) synthesis of a variety of data suggests that the seismogenic structures of the Xingwen M5.7 and Changning M6.0 earthquakes are associated with slip faults that trend NW-SE in, respectively, the south wing and the axis of the Changning–Shuanghe anticline, while that of the Gongxian M5.3 earthquake is associated with thrust faults that trend N-S in the Jianwu syncline region. The dynamic sources of the three earthquakes are all from the SE pushing of the Qinghai–Tibet block on the Sichuan basin;(4) the risk of future strong earthquakes in this area must be reevaluated in light of the facts(a)that in recent years, moderate-to-strong earthquake swarms have occurred frequently in southeast Sichuan;(b) that the complex structural area exhibits the easy-to-trigger characteristic, and(c) that the small-scale faults in this area are characterized by the phenomenon of stress 'lock and release'. | Feng Long ZhiWei Zhang YuPing Qi MingJian Liang Xiang Ruan WeiWei Wu GuoMao Jiang LongQuan Zhou | 2020 | Earth and Planetary Physics2020，4，2： | 13 |
| 3 | Efficient InGaN-based yellow-light-emitting diodes显示文摘Realization of efficient yellow-light-emitting diodes(LEDs) has always been a challenge in solid-state lighting.Great effort has been made, but only slight advancements have occurred in the past few decades. After comprehensive work on InGaN-based yellow LEDs on Si substrate, we successfully made a breakthrough and pushed the wall-plug efficiency of 565-nm-yellow LEDs to 24.3% at 20 A∕cm^2 and 33.7% at 3 A∕cm^2. The success of yellow LEDs can be credited to the improved material quality and reduced compressive strain of InGaN quantum wells by a prestrained layer and substrate, as well as enhanced hole injection by a 3 D pn junction with V-pits. | FENGYI JIANG JIANLI ZHANG LONGQUAN XU JIE DING GUANGXU WANG XIAOMING WU XIAOLAN WANG CHUNLAN MO ZHIJUE QUAN XING GUO CHANGDA ZHENG SHUAN PAN JUNLIN LIU | 2019 | Photonics Research2019，7，2： | 13 |
| 4 | Efficient emission of InGaN-based light-emitting diodes:toward orange and red显示文摘Indium gallium nitride(InGaN)-based light-emitting diodes(LEDs)are considered a promising candidate for red-green-blue(RGB)micro displays.Currently,the blue and green LEDs are efficient,while the red ones are inefficient for such applications.This paper reports our work of creating efficient InGaN-based orange and red LEDs on silicon(111)substrates at low current density.Based on the structure of InGaN yellow LEDs,by simply reducing the growth temperature of all the yellow quantum wells(QWs),we obtained 599 nm orange LEDs with peak wall-plug efficiency(WPE)of 18.1%at 2 A/cm^2.An optimized QW structure was proposed that changed two of the nine yellow QWs to orange ones.Compared with the sample containing nine orange QWs,the sample with two orange QWs and seven yellow QWs showed similar emission spectra but a much higher peak WPE up to 24.0%at 0.8 A/cm^2 with a wavelength of 608 nm.The improvement of peak WPE can be attributed to the improved QW quality and the reduced active recombination volume.Subsequently,a series of efficient InGaN-based orange and red LEDs was demonstrated.With further development,the InGaN-based red LEDs are believed to be attainable and can be used in micro LED displays. | Shengnan Zhang Jianli Zhang Jiangdong Gao Xiaolan Wang Changda Zheng Meng Zhang Xiaoming Wu Longquan Xu Jie Ding Zhijue Quan Fengyi Jiang | 2020 | Photonics Research2020，8，11： | 10 |
| 5 | Optimizing mechanical property and cytocompatibility of the biodegradable Mg-Zn-Y-Nd alloy by hot extrusion and heat treatment显示文摘The Mg-Zn-Y-Nd alloy is a new type of degradable material for biomedical application. In the present study, Mg-6Zn-1.2Y-0.8Nd alloy was fabricated, and then extrusion and heat treatment were conducted to optimize its mechanical properties and cytocompatibility. The microstructure observation, mechanical property, degradation behavior and cytocompatibility tests were conducted on the Mg-Zn-Y-Nd alloy with three different states: as-cast(alloy C), as-extruded(alloy E) and extruded + heat treated(alloy EH).The results show that alloy C consists of coarse grains and continuous secondary phases. The extrusion process has caused incomplete recrystallization, and results in a mixed grain structure of elongated grains and small equiaxed grains(alloy E). The heat treatment process has promoted the recrystallization and homogenized the grain structure(alloy EH). Both the strength and ductility of the alloy has been improved by extrusion, but the following heat treatment has decreased the strength and increased the ductility.The degradation behavior of the alloy C and E alloys does not show much difference, but improves slightly in alloy EH, because the heat treatment has homogenized the microstructure and released the residual stress in the alloy. The directly and indirectly cell viability tests indicate that alloy EH exhibits the best cytocompatibility, which should be ascribed to its relative uniform degradation and low ion releasing rate. In summary, the combination of hot extrusion and heat treatment could optimize the mechanical property and cytocompatibility of the Mg-Zn-Y-Nd alloy together, which is beneficial for the future application of the alloy. | Yiyuan Kang Beining Du Yueming Li Baojie Wang Liyuan Sheng Longquan Shao Yufeng Zheng Tingfei Xi | 2019 | Journal of Materials Science & Technology2019，35，1： | 8 |
| 6 | Acidity of Aerosols during Winter Heavy Haze Events in Beijing and Gucheng, China显示文摘We investigated the acidity and concentrations of water-soluble ions in PM_(2.5) aerosol samples collected from an urban site in Beijing and a rural site in Gucheng, Hebei Province from November 2016 to January 2017 to gain an insight into the formation of secondary inorganic species. The average SO_4^(2–), NO_3~–, and NH_4^+ concentrations were 8.3,12.5, and 14.1 μg m^(–3), respectively, at the urban site and 14.0, 14.2, and 24.2 μg m^(–3), respectively, at the rural site.The nitrogen and sulfur oxidation ratios in urban Beijing were correlated with relative humidity(with correlation coefficient r = 0.79 and 0.67, respectively) and the aerosol loadings. Based on a parameterization model, we found that the rate constant of the heterogeneous reactions for SO_2 on polluted days was about 10 times higher than that on clear days, suggesting that the heterogeneous reactions in the aerosol water played an essential role in haze events.The ISORROPIA II model was used to predict the aerosol pH, which had a mean(range) of 5.0(4.9–5.2) and 5.3(4.6–6.3) at the urban and rural site, respectively. Under the conditions with this predicted pH value, oxidation by dissolved NO_2 and the hydrolysis of N_2O_5 may be the major heterogeneous reactions forming SO_4^(2–) and NO_3~– in haze.We also analyzed the sensitivity of the aerosol p H to changes in the concentrations of SO_4^(2–), NO_3~–, and NH_4^+ under haze conditions. The aerosol p H was more sensitive to the SO_4^(2–) and NH_4^+ concentrations with opposing trends, than to the NO_3~– concentrations. The sensitivity of the p H was relatively weak overall, which was attributed to the buffering effect of NH_3 partitioning. | Xiyuan CHI Pengzhen HE Zhuang JIANG Xiawei YU Fange YUE Longquan WANG Bokun LI Hui KANG Cheng LIU Zhouqing XIE | 2018 | Journal of Meteorological Research2018，32，1： | 4 |
| 7 | LncRNA TUG1 mediates lipopolysaccharide-induced proliferative inhibition and apoptosis of human periodontal ligament cells by sponging miR-132显示文摘Emerging evide nee shows that the long non coding RNA taurine-upregulated gene 1(TUG1)plays pivotal roles in regulating biological properties and functions of parenchyma cells in various types of disease processes.However,the mechanism underlying the effects of TUG1 on cell proliferation and apoptosis of human periodontal ligament cells(PDLCs)in periodontitis is undefined.In this study,we explored the functions of TUG1 and its underlying mechanisms in the inflammatory process induced by Porphyromonas gingivalis-derived lipopolysaccharide(LPS)in PDLCs.Our results showed that TUG1 had a decreased expression in both periodontal ligament(PDL)tissues with period ontitis and PDLCs un der a LPS-i nduced inflammatory condition,and TUG1 expressi on was n egatively correlated with miR-132 expressi on in period on titis-affected PDL tissues.Furthermore,we found that TUG1 overexpression in PDLCs alleviated LPS-induced proliferative inhibition and apoptosis promotion,while TUG1 knockdown had the opposite effect.In addition,miR-132 inhibitor alleviated TUG1 knockdown?induced inhibition of proliferation and in crease of apoptosis in PDLCs un der inflammatory con ditions in duced by LPS.These fin dings indicated that TUG1 has an enormous potential in regulating cell proliferation and apoptosis of PDLCs during periodontitis and may provide an effective therapeutic target for periodontitis to reduce the damage caused by inflammatory reactions. | Ying Han Fang Wang Longquan Shao Peidi Huang Yue Xu | 2019 | Acta Biochimica et Biophysica Sinica2019，51，12： | 4 |
| 8 | Highly sensitive flexible capacitive pressure sensor with a broad linear response range and finite element analysis of micro-array electrode显示文摘With the continuous development of wearable electronics,health care and smart terminals,highly performance flexible pressure sensors present a huge application prospect.In this study,by introducing the micro-array structured electrodes and dielectric layers with high dielectric constant,capacitive pressure sensor fabricated with a brand new preparation strategy and highly sensitive is proposed.The prepared micro-array structure is the basis for sensors with high sensitivity.Besides,the contact area between the two electrodes changes from linear to planar with the increased loading,which result in a wider linear responding range.In addition,by introducing ceramic dielectric material-barium titanate(BT)fillers into the dielectric layer to increase it’s the dielectric constant,the sensitivity of the sensor shows two-fold increase.Moreover,the sensitivity gradients can be tuned by changing the loading contents of BT particles.Hence,compared with parallel board capacitive sensors with ordinary dielectric layer,these sensors exhibit excellent performance as follow,high sensitivity(up to 4.9 kPa^(-1))under low pressure range(0-2500 Pa),low detection limit(<1.7 Pa),short response time(<50 ms),a stable response over 5000 loading-unloading cycles,bending stability and an adjustable sensitivity.Further,the flexible pressure sensor can detect the pressure of the water droplets and monitor human movement behavior.With the facile design and excellent comprehensive properties,the flexible pressure sensor provides a new approach to improve the sensitivity and shows a broad application prospects in the wearable electronics,health care and smart terminals. | Longquan Ma Xuecheng Yu Yuanyuan Yang Yougen Hu Xinyu Zhang Huayuan Li Xing Ouyang Pengli Zhu Rong Sun Ching-ping Wong | 2020 | Journal of Materiomics2020，6，2： | 4 |
| 9 | 基础矩阵估计综合算法的几何意义及分析显示文摘研究了基础矩阵参数的几何意义 ,提出了新的估计基础矩阵的约束条件 .首先用给出的约束求出F阵的 4个参数 ,而这 2个参数正好是 2个对极点的仿射坐标 .然后通过解线性方程组获得其余 4个参数 ,而这 4个参数表示了对极线束间的对应关系 .最后 ,经过对真实图像和合成数据的测试表明本方法有明显的几何意义 。 | 沈沛意 王伟 吴成柯 LongQuan RogerMohr | 1999 | 中国科学(E辑)1999，28，3： | 3 |
| 10 | A bioactive glass functional hydrogel enhances bone augmentation via synergistic angiogenesis,self-swelling and osteogenesis显示文摘Bone augmentation materials usually cannot provide enough new bone for dental implants due to the material degradation and mucosal pressure.The use of hydrogels with self-swelling properties may provide a higher bone augmentation,although swelling is generally considered to be a disadvantage in tissue engineering.Herein,a double-crosslinked gelatin-hyaluronic acid hydrogels(GH)with self-swelling properties were utilized.Meanwhile,niobium doped bioactive glasses(NbBG)was dispersed in the hydrogel network to prepare the GH-NbBG hydrogel.The composite hydrogel exhibited excellent biocompatibility and the addition of NbBG significantly improved the mechanical properties of the hydrogel.In vivo results found that GH-NbBG synergistically promoted angiogenesis and increased bone augmentation by self-swelling at the early stage of implantation.In addition,at the late stage after implantation,GH-NbBG significantly promoted new bone formation by activating RUNX2/Bglap signaling pathway.Therefore,this study reverses the self-swelling disadvantage of hydrogels into advantage and provides novel ideas for the application of hydrogels in bone augmentation. | Fujian Zhao Zhen Yang Huacui Xiong Yang Yan Xiaofeng Chen Longquan Shao | 2023 | Bioactive Materials2023，，4： | 3 |
| 11 | Pilot Study on the Oscillation and Migration of a Spherical Bubble Escaping from the Lateral Propulsion Hole显示文摘在凶恶海洋环境,侧面的推进洞能潜在地是部分从水和俘获一个空气洞。当在水下的捕获的空气洞逃跑和他们可以影响声纳的表演时,水泡将形成。普通商业计算液体动力学软件 CFX 被采用在一个动人的容器产生的侧面的推进洞附近计算周围的流动领域。球形的水泡的摆动基于 Rayleigh-Plesset 方程,它的迁居用动量方程被建模。震荡的水泡的散发的噪音也被学习。目的是从这份报纸的结果将提供某卓见进相应液体和声学的学习。 | Baoyu Ni Shaoshi Dai Rui Han Longquan Sun Hailong Chen | 2012 | Journal of Marine Science and Application2012，11，2： | 2 |
| 12 | Design and evaluation of a novel sub-scaffold dental implant system based on the osteoinduction of micro-nano bioactive glass显示文摘Alveolar ridge atrophy brings great challenges for endosteal implantation due to the lack of adequate vertical bone mass to hold the implants.To overcome this limitation,we developed a novel dental implant design:sub-scaffold dental implant system(SDIS),which is composed of a metal implant and a micro-nano bioactive glass scaffold.This implant system can be directly implanted under mucous membranes without adding any biomolecules or destroying the alveolar ridge.To evaluate the performance of the novel implant system in vivo,SDISs were implanted into the subepicranial aponeurosis space of Sprague–Dawley rats.After 6 weeks,the SDIS and surrounding tissues were collected and analysed by micro-CT,scanning electron microscopy and histology.Our results showed that SDISs implanted into the sub-epicranial aponeurosis had integrated with the skull without any mobility and could stably support a denture.Moreover,this design achieved alveolar ridge augmentation,as active osteogenesis could be observed outside the cortical bone.Considering that the microenvironment of the sub-epicranial aponeurosis space is similar to that of the alveolar ridge,SDISs have great potential for clinical applications in the treatment of atrophic alveolar ridges.The study was approved by the Animal Care Committee of Guangdong Pharmaceutical University(approval No.2017370). | Fujian Zhao Zhen Yang Lu Liu Dafu Chen Longquan Shao Xiaofeng Chen | 2020 | Biomaterials Translational2020，1，1： | 2 |
| 13 | Binding Performance of a Zirconia Framework Material and Veneering Porcelain显示文摘 | Shao Longquan Deng Bin Yi Yuanfu | 2011 | Advanced Materials Research2011，177，： | 1 |
| 14 | Particle Swarm Optimization for Absolute Value Equations 显示文摘 | YONG Longquan | 2010 | Journal of Computational Information Systems2010，6，7： | 1 |
| 15 | A New Method for Absolute Value Equations Based on Har- mony Search Algorithm 显示文摘 | YONG Longquan LIU Sanyang ZHANG Shemin | 2011 | ICIC Express Letters Part B: Applications An International Journal of Research and Sur- veys2011，2，6： | 1 |
| 16 | A Novel Bidirectional LSTM and Attention Mechanism Based Neural Network for Answer Selection in Community Question Answering显示文摘Deep learning models have been shown to have great advantages in answer selection tasks.The existing models,which employ encoder-decoder recurrent neural network(RNN),have been demonstrated to be effective.However,the traditional RNN-based models still suffer from limitations such as 1)high-dimensional data representation in natural language processing and 2)biased attentive weights for subsequent words in traditional time series models.In this study,a new answer selection model is proposed based on the Bidirectional Long Short-Term Memory(Bi-LSTM)and attention mechanism.The proposed model is able to generate the more effective question-answer pair representation.Experiments on a question answering dataset that includes information from multiple fields show the great advantages of our proposed model.Specifically,we achieve a maximum improvement of 3.8%over the classical LSTM model in terms of mean average precision. | Bo Zhang Haowen Wang Longquan Jiang Shuhan Yuan Meizi Li | 2020 | Computers, Materials & Continua2020，，3： | 1 |
| 17 | Electrochemically derived nanographene oxide activates endothelial tip cells and promotes angiogenesis by binding endogenous lysophosphatidic acid显示文摘Graphene oxide(GO)exhibits good mechanical and physicochemical characteristics and has extensive application prospects in bone tissue engineering.However,its effect on angiogenesis is unclear,and its potential toxic effects are heavily disputed.Herein,we found that nanographene oxide(NGO)synthesized by one-step water electrolytic oxidation is smaller and shows superior biocompatibility.Moreover,NGO significantly enhanced angiogenesis in calvarial bone defect areas in vivo,providing a good microenvironment for bone regeneration.Endothelial tip cell differentiation is an important step in the initiation of angiogenesis.We verified that NGO activates endothelial tip cells by coupling with lysophosphatidic acid(LPA)in serum via strong hydrogen bonding interactions,which has not been reported.In addition,the mechanism by which NGO promotes angiogenesis was systematically studied.NGO-coupled LPA activates LPAR6 and facilitates the formation of migratory tip cells via Hippo/Yes-associated protein(YAP)independent of reactive oxygen species(ROS)stimulation or additional complex modifications.These results provide an effective strategy for the application of electrochemically derived NGO and more insight into NGO-mediated angiogenesis. | Wenjing Liu Haiyun Luo Qinwei Wei Jia Liu Junrong Wu Yanli Zhang Lili Chen Wencai Ren Longquan Shao | 2022 | Bioactive Materials2022，7，3： | 1 |
| 18 | Emulsion liq-uid membrane separation of As(Ⅲ)and As(Ⅴ)显示文摘 | Longquan Li Ping Yan Wemhong Gao | 1999 | Frese-nius J Anal Chem1999，363，： | 1 |
| 19 | An improved harmony search algorithm with chaos显示文摘 | TUO Shouheng YONG Longquan | 2012 | Journal of Computational Information Systems2012，8，10： | 1 |
| 20 | Separation of cobalt and nickel by emulsion liquid membrane with the use of EDTA as masking reagent 显示文摘 | Li Longquan Wang Cheng Li Yadong | 1997 | Journal of Membrane Science1997，135，： | 1 |
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