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| 1 | Experimental and measured research on three-dimensional deformation law of gas drainage borehole in coal seam显示文摘Using self-researched gas drainage borehole stability dynamic monitoring device, three-dimensional deformation characteristics of borehole under steady vertical load were researched experimentally and systematically. This research indicated that under the action of steady loading, the mechanical deformation path of the simulated gas drainage borehole is gradually complicated, and the decay of the borehole circumferential strain is an important characterization of the prediction and early warning of borehole instability and collapse. The horizontal position of borehole occurs compressive strain, and the vertical of which occurs tensile strain under the action of vertical stress. At the initial stage of loading, the vertical strain is more sensitive than that in the horizontal direction. After a certain period of time, the horizontal strain is gradually higher than the vertical one, and the intersection of the borehole horizontal diameter and the hole wall is the stress concentration point. With the increase of the depth of hole, the strain shows a gradual decay trend as a whole, and the vertical strain decays more observably, but there is no absolute position correlation between the amount of strain decay and the increase in borehole depth,and the area within 1.5 times the orifice size is the borehole stress concentration zone. | Hongbao Zhao Jinyu Li Yihong Liu Yikuo Wang Tao Wang Hui Cheng | 2020 | International Journal of Mining Science and Technology2020，30，3： | 5 |
| 2 | Shoaling of the internal solitary waves over the continental shelf of the northern South China Sea显示文摘The activities of internal solitary waves(ISWs) over the continental shelf of the northern South China Sea(SCS)are of high complexity. In this study, we investigated the spatial-temporal characteristics of the shoaling ISWs over the northern SCS continental shelf using the satellite images and the results of numerical simulation. The examination of the ISW signals in the satellite optical images revealed the existence of three types of ISWs in the region north to the Dongsha Island, namely, mode-1 depression ISW, mode-1 elevation ISW, and mode-2 convex ISW. The geographical distributions of these ISWs were derived from the satellite images. Numerical results exhibited the process of polarity conversion of ISWs, by which mode-1 elevation waves were transformed from the shoaling mode-1 depression waves. The mode-2 convex ISWs generally followed the mode-1 depression ISWs.The numerical results suggested that the interaction of the mode-1 depression ISWs with the up-slope topography locally generated mode-2 ISWs, and such waves of high vertical mode dissipated rapidly during the inshore propagation. | QIAN Hongbao HUANG Xiaodong TIAN Jiwei ZHAO Wei | 2015 | Acta Oceanologica Sinica2015，34，9： | 3 |
| 3 | Studying the performance of fully encapsulated rock bolts with modified structural elements显示文摘Numerical simulation is a useful tool in investigating the loading performance of rock bolts.The cable structural elements(cableSELs)in FLAC3D are commonly adopted to simulate rock bolts to solve geotechnical issues.In this study,the bonding performance of the interface between the rock bolt and the grout material was simulated with a two-stage shearing coupling model.Furthermore,the FISH language was used to incorporate this two-stage shear coupling model into FLAC3D to modify the current cableSELs.Comparison was performed between numerical and experimental results to confirm that the numerical approach can properly simulate the loading performance of rock bolts.Based on the modified cableSELs,the influence of the bolt diameter on the performance of rock bolts and the shear stress propagation along the interface between the bolt and the grout were studied.The simulation results indicated that the load transfer capacity of rock bolts rose with the rock bolt diameter apparently.With the bolt diameter increasing,the performance of the rock bolting system was likely to change from the ductile behaviour to the brittle behaviour.Moreover,after the rock bolt was loaded,the position where the maximum shear stress occurred was variable.Specifically,with the continuous loading,it shifted from the rock bolt loaded end to the other end. | Jianhang Chen Hongbao Zhao Fulian He Junwen Zhang Kangming Tao | 2021 | International Journal of Coal Science & Technology2021，8，1： | 2 |
| 4 | Study on impact of coal and gas outburst strength caused by principal stress显示文摘 | ZHAO HONGBAO YIN GUANGZHI | 2010 | Disaster Advances2010，3，4： | 1 |
| 5 | Fraud detection on payment transaction networks via graph computing and visualization显示文摘With the fast development of Internet technology,more and more payments are fulfilled by mobile Apps in an electrical way which significantly saves time and efforts for payment.Such a change has benefited a large number of individual users as well as merchants,and a few major players for payment service have emerged in China.As a result,the payment service competition becomes even fierce,and various promotion activities have been launched for attracting more users by the payment service providers.In this paper,the problem focused on is fraud payment detection,which in fact has been a major concern for the providers who spend a significant amount of money to popularize their payment tools.This paper tries the graph computing-based visualization to the behavior of transactions occuring between the individual users and merchants.Specifically,a network analysisbased pipeline has been built.It consists of the following key components:transaction network building based on daily records aggregation;transaction network filtering based on edge and node removal;transaction network decomposition by community detection;detected transaction community visualization.The proposed approach is verified on the real-world dataset collected from the major player in the payment market in Asia and the qualitative results show the efficiency of the method. | 孙权 Tang Tao Zheng Jianbin Lin Jiale Zhao Jintao Liu Hongbao | 2020 | High Technology Letters2020，26，3： | 0 |
| 6 | Enhanced piezoelectric properties and thermal stability of Bi_(0.5)Na_(0.5)TiO_(3)modified BiFeO_(3)-BaTiO_(3)ceramics with morphotropic phase boundary显示文摘Morphotropic phase boundary(MPB)plays a key role in tuning piezoelectric responses of ferroelectric ceramics.Here,Bi_(0.5)Na_(0.5)TiO_(3)modified BiFeO_(3)-BaTiO_(3)ternary solid solutions of 0.7BiFeO_(3)-(0.3-x)BaTiO_(3)-xBi_(0.5)Na_(0.5)TiO_(3)(referred to as BF-BT-xBNT,0.00≤x≤0.04)were prepared for lead-free piezo-electrics.All the ceramics exhibit an MPB with coexisting rhombohedral(R)and tetragonal(T)phases,and the R/T phase ratio decreases upon increasing x.The increment of BNT promotes the grain growth,lowers the leakage current and Curie temperature(TC),and gradually drives the ferroelectric to relaxor transition.Because of the MPB with appropriate R/T phase ratio,increased grain size and density,and decreased leakage current,the well-balanced performance between d_(33)=206 pC/N and TC=488℃is obtained in x=0.01 case.In addition,the further enhanced in-situ d_(33)=286e347 pC/N is obtained in BF-BT-xBNT ceramics along with the improved depolarization temperature T_(d)from 280 to 312℃,showing a potential application for lead-free piezoceramics at high temperature. | Shuai Cheng Boping Zhang Shengjie Ai Hongbao Yu Xin Wang Jiahao Yang Changrong Zhou Jingtai Zhao Guanghui Rao | 2023 | Journal of Materiomics2023，9，3： | 0 |
| 7 | T-MPLS Technology and Application on Carrier Ethernet显示文摘As a connection-oriented packet transport technology,Transport Multi-Protocol Label Switching(T-MPLS) is an important bearer technology for Carrier Ethernet(CE).This article starts with the technological characteristics of T-MPLS,then goes on to the latest T-MPLS standardization progress and challenges,followed by the description of T-MPLS based CE architecture.Next,the article covers several key technologies related with T-MPLS,including the data forwarding plane,control plane,network survivability,and Operation,Administration and Maintenance(OAM).Finally,the article analyzes the applications of T-MPLS based CE. | Qu Hua 1,Zhao Jihong 2,Mao Hongbao 2(1.Xi’an Jiaotong University,Xi’an 710049,P.R.China 2.Xi’an University of Posts and Telecommunications,Xi’an 710061,P.R.China) | 2009 | ZTE Communications2009，7，1： | 0 |
| 8 | Continuous cropping of alfalfa (Medicago sativa L.) reduces bacterial diversity and simplifies cooccurrence networks in aeolian sandy soil显示文摘Alfalfa is a perennial herbaceous forage legume that is remarkably and negatively affected by monocropping.However,the contribution of the changes in bacterial communities to soil sickness in alfalfa have not been elucidated.Therefore,we investigated bacterial community structures in response to monocropped alfalfa along the chronosequence.Continuous cropping remarkably reduced bacterial alpha diversity and altered community structures,and soil pH,total P and available P were strongly associated with the changes of bacterial diversity and community structures.Intriguingly,10 years of monocropped alfalfa might be a demarcation point separating soil bacterial community structures into two obvious groups that containing soil samples collected in less and more than 10 years.The relative abundances of copiotrophic bacteria of Actinobacteria and Gammaproteobacteria significantly increased with the extension of continuous cropping years,while the oligotrophic bacteria of Armatimonadetes,Chloroflexi,Firmicutes and Gemmatimonadetes showed the opposite changing patterns.Among those altered phyla,Actinobacteria,Chloroflexi,Alphaproteobacteria and Acidobacteria were the most important bacteria which contributed 50.86%of the community variations. Additionally, the relative abundances of nitrogen fixation bacteria ofBradyrhizobium and Mesorhizobium obviously increased with continuous cropping years, while theabundances of Arthrobacter, Bacillus, Burkholderiaceae and Microbacterium with potential functionsof solubilizing phosphorus and potassium remarkably decreased after long-term continuouscropping. Furthermore, bacterial cooccurrence patterns were significantly influenced by continuouscropping years, with long-term monocropped alfalfa simplifying the complexity of the cooccurrencenetworks. These findings enhanced our understandings and provided references for forecasting howsoil bacterial communities responds to monocropped alfalfa. | Yanxia Xu Junjie Liu Xuefeng Liu Hong Li Zhao Yang Hongbao Wang Xinyu Huang Lan Lan Yutong An Lujun Li Qin Yao Guanghua Wang | 2022 | Soil Ecology Letters2022，4，2： | 0 |
| 9 | Influence of cyclic dynamic disturbance on damage evolution and zoning effect of coal-rock under local static load constraint显示文摘In order to obtain the characteristics of the effects of cyclic impact loading on the damage of coal-rock in the presence of a local static load constraint,the evolution of the damage factor and the fracture rate during the process and incremental cyclic impact on raw coal and briquettes has been studied.Experimental results show that the presence of local static load restraint improves the impact resistance of the coal-rock,and the damage factor of the coal-rock shows obvious zoning characteristics.When the coal-rock is in an elastic state,the partition with a larger static load restraint area has stronger impact resistance,when the coal-rock is in a plastic state,the partition with a larger static load restraint area has a weaker impact resistance.Increasing impulsive cyclic impacts have a higher damage efficiency to coal-rock than constant impulsive cyclic impacts.The difference in rock breaking efficiency between the two cyclic impact methods is mainly reflected in the partition with the largest constrained area.The crack propagation on the coal-rock surface is more consistent with the partition characteristics of the damage factor.When the static load constrained zone is in an elastic state,the static load has an inhibitory effect on the crack growth.When the static load confinement zone is in a plastic state,the cracks mainly propagate in the static load confinement zone,and the constrained zone mainly consists of tensile cracks that grow in the vertical direction,while the cracks in the non-constrained zone mainly grow in an oblique direction.Finally,fracture mechanics was applied to analyze the failure type of the sample. | Yihong Liu Hongbao Zhao Aiwen Wang Lianpeng Dai Yue Li Hongwei Zhang | 2023 | Geohazard Mechanics2023，1，4： | 0 |
| 10 | Plastic forming behavior of axisymmetric bimetal products with rotary swaging显示文摘In this paper,an elasto-viscoplastic three-dimension(3D) finite element model is developed to simulate the processing of bimetal tube with rotary swaging. Through simulation,the effects of high-frequency pulse stroking on the distribution and histories of stress,stain and loading are clarified. The stress in inner tube is compressive and higher than the minimum bonding force. Meanwhile,the stiffness of inner tube impacts outer tube extension in length. | Song Tao Zhao Shengdun Yan Guanhai Liu Hongbao | 2013 | Engineering Sciences2013，11，1： | 0 |
| 11 | Causal associations between major depressive disorder and COVID-19显示文摘Background We aimed to evaluate whether major depressive disorder(MDD)could aggravate the outcomes of coronavirus disease 2019(COVID-19)or whether the genetic liability to COVID-19 could trigger MDD.Aims We aimed to assess bidirectional causal associations between MDD and COVID-19.Methods We performed genetic correlation and Mendelian randomisation(MR)analyses to assess potential associations between MDD and three COVID-19 outcomes.Literature-based network analysis was conducted to construct molecular pathways connecting MDD and COVID-19.Results We found that MDD has positive genetic correlations with COVID-19 outcomes(rg:0.10–0.15).Our MR analysis indicated that genetic liability to MDD is associated with increased risks of COVID-19 infection(odds ratio(OR)=1.05,95%confidence interval(CI):1.00 to 1.10,p=0.039).However,genetic liability to the three COVID-19 outcomes did not confer any causal effects on MDD.Pathway analysis identified a panel of immunity-related genes that may mediate the links between MDD and COVID-19.Conclusions Our study suggests that MDD may increase the susceptibility to COVID-19.Our findings emphasise the need to increase social support and improve mental health intervention networks for people with mood disorders during the pandemic. | Ancha Baranova Yi Zhao Hongbao Cao Fuquan Zhang | 2023 | General Psychiatry2023，36，2： | 0 |
| 12 | Strain-mediated insulator-metal transition in topotactically hydro-reduced SrFeO_(2)显示文摘Controlling oxygen redox reactions in transition metal oxides offers an attractive route to tune their physical properties;a topotactic structural transformation from their parent phases effectively modifies the electronic state. In this work, infinitelayered SrFeO_(2) thin films were produced from brownmillerite SrFeO_(2.5) via low-temperature hydro-reduction. After the structural transition, their out-of-plane lattice constants dramatically shrank by 12%;tensilely strained samples exhibited metallic character, whereas the compressively strained ones maintained the insulating behavior of their bulk form. According to X-ray linear dichroism results, this strain-mediated electronic anisotropy may be attributed to electron redistribution within degenerated orbitals. This suggests a possible mechanism for the metallic conductivity of infinite-layered SrFeO_(2), giving a hint for understanding emergent quantum phenomena, such as the recently discovered superconductivity in nickelates, and stimulating various applications, including in ionic conductivity and oxygen catalysis. | Shuang Chen Jiali Zhao Qiao Jin Shan Lin Shengru Chen Hongbao Yao Jiaou Wang Zhen Fan Er-Jia Guo Haizhong Guo | 2021 | Science China(Physics,Mechanics & Astronomy)2021，64，8： | 0 |
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