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The synergistic catalysis on Co nanoparticles and CoNx sites of aniline-modified ZIF derived Co@NCs for oxidative esterification of HMF

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Chinese Chemical Letters 2021年第2期32卷 685-690页

作者： Tao Rui Guo-ping lu Xin Zhao Xun cao Zhong Chen School of Chemical Engineering Nanjing University of Science&TechnologyNanjing 210094China School of Materials Science&Engineering Nanyang Technological UniversitySingapore 639798Singapore

An efficient sustainable and scalable strategy for the synthesis of porous cobalt/nitrogen co-doped carbons(Co@NCs) via pyrolysis of aniline-modified ZIFs,has been *** can coordinate and absorb on the surface of ZIF(ZIF-CoZn3-PhA),accelerate the precipitation of ZIFs,thus resulting in smaller ZIF particle ***,the aniline on the surface of ZIF-CoZn3-PhA promotes the formation of the protective carbon shell and smaller Co nanoparticles,and increases nitrogen content of the *** of these prope rties of Co@NC-PhA-3,the oxidative esterification of 5-hydroxymethylfurfural can be carried out under ambient *** to our experimental and computational results,a synergistic catalytic effect between CoNx sites and Co nanoparticles has been established,in which both Co nanoparticles and CoNx can activate O2 while Co nanoparticles bind and oxidize ***,the formation and release of active oxygen species in CoNx sites are reinfo rced by the electronic interaction between Co nanoparticles and CoNx.

关键词： Aniline-modified ZIF Porous cobalt/nitrogen co-doped carbon Synergistic catalysis on CoNx sites and Co nanoparticles Oxidative esterification 5-Hydroxymethylfurfural

Strength and failure characteristics of brittle jointed rock-like specimens under uniaxial compression:Digital speckle technology and a particle mechanics approach

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International Journal of Mining Science and Technology 2018年第4期28卷 662-670页

作者： Rihong cao Hang Lin ping cao School of Resources and Safety Engineering Central South University State Key Laboratory for Geo Mechanics and Deep Underground Engineering China University of Mining & Technology

The strength and failure characteristics of most natural rock mass are influenced by discontinues such as fissures, joints, and weak surfaces. In the present study, the strength and failure behavior of ubiquitous- joint rock-l!ke specimens under uniaxial loading have been investigated by DIC （digital image correlation） and discrete element numerical method （PFC2D）. The results are obtained. Firstly, the UCSJ of spec- imens with γ= 15° or 30° shows similar tendency while α goes from 0° to 75°. With γ= 45° or 60°, the UCSJ of specimens increases when α goes from 0° to 30° and decreases after α goes beyond 30°. With γ=75°, the peak UCSJ value is reached when α=0°. The UCSJ value shows an increasing trend when α goes from 60° to 75°. Secondly, the ubiquitous-joint specimens present different failure modes for various levels of α and γ（β-α）. Based on the experimental results, the failure mode of ubiquitous-joint specimens can be classified into three categories： stepped path failure, failure through parallel plane, and failure through cross plane.

关键词： Ubiquitous-joint Digital speckle correlation technique PFC2D Strength Failure mode

Microstructural refinement and performance improvement of Cu-36 wt%Zn alloy by Al_(2)O_(3)nanoparticles coupling electromagnetic stirring

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Rare Metals 2022年第10期41卷 3560-3565页

作者： Ya-Bo Fu Yi-ping lu Zhi-Jun Wang Zhi-Qiang cao Ai-Jiao Xu School of Physics and Electronic Engineering Taizhou UniversityTaizhou318000China School of Materials Science and Engineering Dalian University of TechnologyDalian116024China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an710048China

Cu-36 wt%Zn alloy is widely used in valves of water and heating and auto parts,***,the structure is still coarse,and performances are much *** structure and performances of Cu-36 wt%Zn alloy were investigated by adding Al_(2)O_(3)nanoparticles and *** indicate that by Al_(2)O_(3)nanoparticles coupling electromagnetic stirring,the Cu-36 wt%Zn alloy with refined microstructure was successfully *** average grain size is refined by 99%compared with that without nanoparticles and *** tensile strength(R_m)and percentage elongation after fracture(A11.3)increase by 20.58%and 19.40%,respectively,compared with that without nanoparticles and *** increase heterogeneous nucleation rate by 50%compared with that without *** depth of dezincification layer decreases by 78.71%compared with that without nanoparticles and stirring,as protective layer(Cu-Al_(2)O_(3)-Zn)is completely formed around the grain boundaries.

关键词： Microstructural refinement Rotating electromagnetic field Mechanical performance Al_(2)O_(3)nanoparticles

Transcriptome analysis of molecular mechanisms underlying facial nerve injury repair in rats

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Neural Regeneration Research 2021年第11期16卷 2316-2323页

作者： Qian-Qian cao Shuo Li Yan lu Di Wu Wei Feng Yong Shi lu-ping Zhang Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education Co-innovation Center of NeuroregenerationNantong UniversityNantongJiangsu ProvinceChina Department of Otolaryngology Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Department of Otolaryngology Head and Neck SurgeryEyeEarNose and Throat HospitalFudan UniversityShanghaiChina

Although the transcriptional alterations inside the facial nucleus after facial nerve injury have been well studied,the gene expression changes in the facial nerve trunk after injury are still *** this study,we established an adult rat model of facial nerve crush injury by compressing the right lateral extracranial nerve *** sequencing,differential gene expression analysis,and cluster analysis of the injured facial nerve trunk were performed,and 39 intersecting genes with significant variance in expression were *** Ontology annotation and Kyoto Encyclopedia of Genes and Genomes pathway analyses of the 39 intersecting genes revealed that these genes are mostly involved in leukocyte cell-cell adhesion and phagocytosis and have essential roles in regulating nerve *** real-time polymerase chain reaction assays were used to validate the expression of pivotal ***,nine pivotal genes that contribute to facial nerve recovery were identified,including Arhgap30,Akr1b8,C5ar1,Csf2ra,Dock2,Hcls1,Inpp5d,Sla,and *** Schwann cells were isolated from the sciatic nerve of neonatal *** knocking down Akr1b8 in Schwann cells with an Akr1b8-specific small interfering RNA plasmid,expression levels of monocyte chemoattractant protein-1 and interleukin-6 were decreased,while cell proliferation and migration were not obviously *** findings suggest that Akr1b8 likely regulates the interaction between Schwann cells and macrophages through regulation of cytokine expression to promote facial nerve *** study is the first to reveal a transcriptome change in the facial nerve trunk after facial nerve injury,thereby revealing the potential mechanism underlying repair of facial nerve *** study was approved by the Animal Ethics Committee of Nantong University,China in 2018(approval No.S20180923-007).

关键词： Akr1b8 cell proliferation facial nerve injury Gene-Act Networks inflammatory response RNA-Seq Schwann cells transcriptomics analysis

3D SLOPE STABILITY ANALYSIS WITH KINEMATICAL ELEMENT TECHNIQUE

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中国有色金属学会会刊：英文版 1999年第2期9卷 218-222页

作者： cao, ping Gussmann, Peter Central South Univ of Technology Changsha China

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关键词： kinematical element methodstability analysisthree dimensional slope

Stochastic stability of cubature predictive filter

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Science China(Information Sciences) 2016年第9期59卷 107-130页

作者： lu cao Xiaoqian CHEN The State Key Laboratory of Astronautic Dynamics China Xi'an Satellite Control Center College of Aerospace Science and Engineering National University of Defense Technology

In this paper, the cubature predictive filter(CPF) is derived based on a third-degree spherical-radial cubature rule. It provides a set of cubature-points scaling linearly with the state-vector dimension, which makes it possible to numerically compute multivariate moment integrals encountered in the nonlinear predictive filter(PF). In order to facilitate the new method, the algorithm CPF is given firstly. Then, the theoretical analyses demonstrate that the estimated accuracy of the model error and system for the proposed CPF is higher than that of the traditional PF. Moreover, the authors analyze the stochastic boundedness and the error behavior of CPF for general nonlinear systems in a stochastic framework. In particular, the theoretical results present that the estimation error remains bounded and the covariance keeps stable if the system’s initial estimation error,disturbing noise terms as well as the model error are small enough, which is the core part of the CPF *** of the results have been demonstrated by numerical simulations for a nonlinear example system.

关键词： predictive filter cubature rule nonlinear filter stochastic system

Minimum sliding mode error feedback control for inner-formation satellite system with J2 and small eccentricity

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Science China(Information Sciences) 2016年第7期59卷 214-231页

With the recent flurry of the research on Inner-Formation satellite system, there has been apparent need for a set of linearized equations to describe the relative motion of satellites under the effect of the Jgeopotential disturbance, which is the important perturbed-factor for low-orbit Inner-Formation system. Hence,on the assumption of small eccentricity, a new set of linearized equations of motion is proposed that accounts for Jperturbations in an elliptical orbit. To avoid the collision between the inner satellite and the outer satellite,the Minimum Sliding Mode Error Feedback Control(MSMEFC) is developed to perform a real-time control on the outer satellite with the uncertain perturbations from the space. The highlight of MSMEFC is to introduce the concept of equivalent control error, which is the key utilization of MSMEFC. It is shown that the proposed MSMEFC can compensate any kinds of uncertain perturbations. Besides, in this paper, the relationship between the equivalent control error and uncertain perturbations is discussed. The robustness and steady-state error of MSMEFC are also analyzed to show its theoretical advantages compared with traditional SMC. Numerical simulations are employed to check the fidelity of the linearized equations. In addition, the efficacy of MSMEFC is verified by the utilization of Inner-Formation system with high control precision.

关键词： inner-formation gravity measurement minimum sliding mode error sliding mode control J2

Rank-Based Test for Partial Functional Linear Regression Models

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Journal of Systems Science & Complexity 2020年第5期33卷 1571-1584页

作者： XIE Tianfa cao Ruiyuan YU ping College of Applied Sciences Beijing University of TechologyBeijing 100124China School of Mathematics and Computer Science Shanri Normal UniversityLinfen 041000China

This paper investigates the hypothesis test of the parametric component in partial functional linear regression *** on a rank score function,the authors develop a rank test using functional principal component analysis,and establish the asymptotic properties of the resulting test under null and local alternative hypotheses.A simulation study shows that the proposed test procedure has good size and power with finite sample *** authors also present an illustration through fitting the Berkeley Growth Data and testing the effect of gender on the height of kids.

关键词： Asymptotic normality functional principal component analysis Karhunen-loève expansion local alternative hypothesis rank regression

Support technology of deep roadway under high stress and its application

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International Journal of Mining Science and Technology 2016年第5期26卷 787-793页

作者： cao Rihong cao ping Lin Hang School of Resources and Safety Engineering Central South University Changsha 410083 China State Key Laboratory of Coal Resources and Safety Mining School of Mines China University of Mining ＆ Technology Xuzhou 221116 China

Roadway instability has been a major concern in the fields of mining engineering. This paper aims to provide practical and efficient strategy to support the roadways under high in-situ stress. A case study on the stability of deep roadways was carried out in an underground mine in Gansu province, China. Currently,the surrounding rock strata is extremely fractured, which results in a series of engineering disasters, such as side wall collapse and severe floor heave in the past decades. Aiming to solve these problems, an improved support method was proposed, which includes optimal bolt parameters and arrangement, floor beam layout by grooving, and full length grouting. Based on the modeling results by FLAC3D, the new support method is much better than the current one in terms of preventing the large deformation of surrounding rock and restricting the development of plastic zones. For implementation and verification, field experiments, along with deformation monitoring, were conducted in the 958 level roadway of Mining II areas. The results show that the improved support can significantly reduce surrounding rock deformation, avoid frequent repair, and maintain the long-term stability of the roadway. Compared to the original support, the new support method can greatly save investment of mines, and has good application value and popularization value.

关键词： Deep roadway Floor heave High stress Support Steel beam