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Severe skeletal bimaxillary protrusion treated with micro-implants and a self-made four-curvature torquing auxiliary: A case report

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World Journal of Clinical Cases 2021年第3期9卷 722-735页

作者： Rui Liu Wan-Bang hou Ping-zhu Yang Lin zhu yong-Quan Zhou Xia Yu Xiu-Jie Wen Department of Stomatology Daping HospitalThird Military Medical University(Army Military Medical University)Chongqing 400042China Department of Orthodontics Hospital of StomatologySouthwest Medical UniversityLuzhou 646000Sichuan ProvinceChina

BACKGROUND Bimaxillary protrusion is a clinically common dentofacial deformity,particularly among Chinese *** kind of malformation can severely affect facial esthetics and,even in mild cases,is difficult to correct without ***,many patients abandon treatment because of fear of ***,we describe a case of severe skeletal bimaxillary protrusion treated with nonsurgical orthodontic treatments,highlighting an alternative treatment *** SUMMARY A 31-year-old woman wished to address a severe protrusion profile(approximately 8 mm overbite)and gummy *** analysis and superimposition showed a severe skeletal class II pattern with a mandibular retrusion,and proclined and protrusive mandibular *** radiograph showed a missing mandibular right third molar.A diagnosis of severe bimaxillary dentoalveolar protrusion was *** into account the patient’s fear of orthognathic surgery,she accepted the proposed alternative treatment using micro-implants and a self-made four-curvature torquing *** treatment allowed for maximal en masse anterior tooth retraction,proper relocation of incisors,and alleviation of the skeletal class II ***,the patient’s lip protrusion was significantly decreased as was the overjet(from 10.5 mm to 1.8 mm),and the results remained stable throughout the 2-year *** Nonsurgical treatment using micro-implants and a four-curvature torquing auxiliary may benefit severe cases of skeletal bimaxillary protrusion in adults.

关键词： Orthodontics Bimaxillary protrusion Micro-implants Self-made fourcurvature torquing auxiliary Teeth Case report

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Physical and computational study of a novel submerged entry nozzle design for twin-roll casting process

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Journal of Iron and Steel Research International 2021年第11期28卷 1390-1399页

作者： Mian-guang Xu Miao-yong zhu School of Mechanical Engineering Shandong University of TechnologyZibo 255000ShandongChina School of Metallurgy Northeastern UniversityShenyang 100819LiaoningChina

With significant emphasis on reducing the turbulence in the bath and the need for effective distribution of metal along the roller length in twin-roll casting,a novel submerged entry nozzle(SEN)configuration with two“gap regions”was ***“gap regions”of the new SEN divide the bath into two parts,the“upper melt bath”(casting region)and the“lower melt bath”(rolling region).The newly designed SEN was tested by using both full-scale water modeling experiments and numerical *** demonstrated that the turbulence could only be found near the rotating roller ***“gap regions”can make the near-wall flows more *** can also prevent the instabilities in the“upper melt bath”to be transferred to the“lower melt bath”,thus improving the stability of the ***,the novel SEN can stabilize the meniscus where the initial solidification *** is achieved by increasing the SEN immersion depth,which in turn,can enlarge the volume of the upper part of the bath.

关键词： Twin-roll casting Submerged entry nozzle Water model Numerical simulation

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Bionics-Inspired Structure Boosts Drag and Noise Reduction of Rotating Machinery

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Journal of Bionic Engineering 2023年第6期20卷 2797-2813页

作者： Shengnan Tang yong zhu Shouqi Yuan Institute of Advanced Manufacturing and Modern Equipment Technology Jiangsu UniversityZhenjiang212013China International Shipping Research Institute GongQing Institute of Science and TechnologyJiujiang332020China National Research Center of Pumps Jiangsu UniversityZhenjiang212013JiangsuChina Saurer(Changzhou)Textile Machinery Co. LtdChangzhou213200China Leo Group Co. LtdWenling317500China Wenling Fluid Machinery Technology Institute of Jiangsu University Wenling317525China

As a global concern,environmental protection and energy conservation have attracted significant *** to the large carbon emission of electricity,promoting green and low-carbon transformation of the power industry via the synergistic development of clean energy sources is *** machinery plays a crucial role in pumped storage,hydropower generation,and nuclear power *** by bionics,non-smooth features of creatures in nature have been introduced into the structure design of efficient rotating ***,the concept and classification of bionics are ***,the representative applications of non-smooth surface bionic structures in rotating machineries are systematically and comprehensively reviewed,such as groove structure,pit structure,and other non-smooth ***,conclusions are drawn and future directions are *** effective design of a bionic structure contributes toward noise reduction,drag reduction and efficiency improvement of rotating *** and ecological rotating machinery will remarkably reduce energy consumption and contribute to the realization of the“double carbon”goal.

关键词： Bionics Rotating machinery Non-smooth surface Pit structure Groove structure

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Loading direction dependence of asymmetric response of pyramidal slip in rolled AZ31 magnesium alloy

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Journal of Magnesium and Alloys 2023年第10期11卷 3634-3641页

作者： Yuzhi zhu Dewen hou Kaixuan Chen Zidong Wang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Micron School of Materials Science and Engineering Boise State UniversityBoiseID 83725United States Center for Nanoscale Materials Argonne National LaboratoryLemontIL 60439United States

Textured magnesium alloys usually exhibit anisotropic mechanical behavior due to the asymmetric activation of different twinning and slipping *** work focuses on the pyramidal slip responses of rolled AZ31 magnesium alloy under two loading conditions,compressive and tensile loading along the normal *** the condition where the compressive loading direction is closely parallel to the c-axis of the unit cell,tensile twinning and basal slips are prohibited, dislocations then active and tend to accumulate at grain boundaries and form dislocation ***,these dislocations exhibit zigzag morphologies,which result from the cross-slip from {10■1} first-order pyramidal plane to {11■2} second-order pyramidal plane,then back to {10■1} first-order pyramidal *** the condition where tensile twins are prevalent,{10■1} first-order and {11■2} second-order pyramidal dislocations are favorable to be *** types of dislocations behave climb-like dissociations onto the basal plane,forming zigzag dislocations.

关键词： Magnesium pyramidal slip Asymmetry Cross-slip

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Analysis on life model of large sensor networks

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Science China(Information Sciences) 2013年第4期56卷 40-49页

作者： zhu XiaoRong WANG yong zhu HongBo Wireless Comminication Key Lab of Jiangsu Province Nanjing University of Posts and Telecommunications Department of Science PLA University of Science and Technology

A large sensor network needs multiple base stations(BSs) to collect data *** design effort often aims at maximizing the network *** lifetime of a network depends on,besides battery capacity,factors such as node density,sampling period and the partitioning of the network for the multiple base *** this paper,we propose a stochastic approach to finding the lifetime of large sensor networks with multiple BSs and randomly scattered *** begin by partitioning the network into regions by the Voronoi diagram method,one for each base *** then propose a method to find the minimum transmission range needed for guaranteeing network *** nodes connected,we derive the traffic rate of nodes at specific distance from the base *** on the traffic rate and energy consumption model,the lifetime distribution of a region is *** the results of individual regions,the network lifetime distribution is *** studies are presented and verified by computer simulation.

关键词： sensor networks lifetime distribution multiple base stations

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Post-Processing Time-Aware Optimal Scheduling of Single Robotic Cluster Tools

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 597-605页

作者： Qing Hua zhu Yan Qiao NaiQi Wu Yan hou School of Computer Science and Technology Guangdong University of TechnologyGuangzhou 510006China Institute of Systems Engineering Macao University of Science and TechnologyTaipa 999078MacaoChina State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006China

Integrated circuit chips are produced on silicon *** cluster tools are widely used since they provide a reconfigurable and efficient environment for most wafer fabrication *** advances in new semiconductor materials bring about new functionality for integrated *** a wafer is processed in a processing chamber,the wafer should be removed from there as fast as possible to guarantee its high-quality integrated ***,maximization of the throughput of robotic cluster tools is *** work aims to perform post-processing time-aware scheduling for such tools subject to wafer residencytime *** do so,closed-form expression algorithms are derived to compute robot waiting time accurately upon the analysis of particular events of robot waiting for singlearm cluster *** are given to show the application and effectiveness of the proposed algorithms.

关键词： Cluster tool discrete event systems optimization robotic systems scheduling

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Irisin-loaded electrospun core-shell nanofibers as calvarial periosteum accelerate vascularized bone regeneration by activating the mitochondrial SIRT3 pathway

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Regenerative Biomaterials 2024年第1期3卷 44-57页

作者： Xi Hua Mingzhuang hou Lei Deng Nanning Lv yong Xu Xuesong zhu Huilin Yang Qin Shi Hao Liu Fan He Department of Orthopaedics The First Affiliated Hospital of Soochow UniversitySoochow UniversitySuzhou 215006China Orthopaedic Institute Suzhou Medical CollegeSoochow UniversitySuzhou 215000China Department of Orthopedics Suzhou Wuzhong People’s HospitalSuzhouJiangsu Province 215128China Department of Orthopedic Surgery Lianyungang Clinical College of Xuzhou Medical UniversityLianyungang 222003China

The scarcity of native periosteum poses a significant clinical barrier in the repair of critical-sized bone *** challenge of enhancing regenerative potential in bone healing is further compounded by oxidative stress at the fracture ***,the introduction of artificial periosteum has demonstrated its ability to promote bone regeneration through the provision of appropriate mechanical support and controlled release of proosteogenic *** this study,a poly(L-lactic acid)(PLLA)/hyaluronic acid(HA)-based nanofibrous membrane was fabricated using the coaxial electrospinning *** incorporation of irisin into the core-shell structure of PLLA/HA nanofibers(PLLA/HA@Irisin)achieved its sustained *** vitro experiments demonstrated that the PLLA/HA@Irisin membranes exhibited favorable *** osteogenic differentiation of bone marrow mesenchymal stem cells(BMMSCs)was improved by PLLA/HA@Irisin,as evidenced by a significant increase in alkaline phosphatase activity and matrix ***,PLLA/HA@Irisin significantly enhanced the mitochondrial function of BMMSCs via the activation of the sirtuin 3 antioxidant *** assess the therapeutic effectiveness,PLLA/HA@Irisin membranes were implanted in situ into critical-sized calvarial defects in *** results at 4 and 8 weeks post-surgery indicated that the implantation of PLLA/HA@Irisin exhibited superior efficacy in promoting vascularized bone formation,as demonstrated by the enhancement of bone matrix synthesis and the development of new blood *** results of our study indicate that the electrospun PLLA/HA@Irisin nanofibers possess characteristics of a biomimetic periosteum,showing potential for effectively treating critical-sized bone defects by improving the mitochondrial function and maintaining redox homeostasis of BMMSCs.

关键词： periosteum irisin mitochondrial function critical-sized bone defect redox homeostasis

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Anticorrosion Performance of Epoxy Coatings Containing Small Amount of Inherently Conducting PEDOT/PSS on Hull Steel in Seawater

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Journal of Materials Science & Technology 2013年第7期29卷 678-684页

作者： Jian hou Guang zhu Jingkun Xu Huajian Liu Science and Technology on Marine Corrosion and Protection Laboratory Luoyang Ship Material Research Institute Jiangxi Key Laboratory of Organic Chemistry Jiangxi Science & Technology Normal University

Corrosion protection of the hull steel by the conventional epoxy paint containing a small amount of commercial poly（3,4-ethylenedioxythiophene）/poly（styrene sulfonate）（PEDOT/PSS）, which is one of the most popular and successful inherently conducting polymers as the corrosion inhibitor was studied. The corrosion behavior of the samples was investigated in seawater by electrochemical impedance spectroscopy and open circuit potential. Scanning electron microscopy was used to observe the surface morphology of the samples after corrosion. It was found that adding a small amount of PEDOT/PSS to the epoxy resin can significantly improve its corrosion protection.

关键词： Anticorrosion Conducting polymer Electrochemical impedance spectroscopy (EIS) Coating

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Capability-based context ontology modeling and reasoning for C^4ISR communication

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Journal of Systems Engineering and Electronics 2016年第4期27卷 845-857页

作者： Weixing zhu Zhixue Wang Guolin hou Minggang Yu Institute of Command Information System PLA University of Science and TechnologyNanjing 210007China The First Engineers Scientfic Research Institute of General Armaments Department Wuxi 214035China

Modeling and reasoning on domain contexts play a key role for adding intelligence to communication services, and the approach of capability-based requirement engineering ensures the scientificity and accuracy of requirement elicitation. This paper presents a capability-based context ontology modeling approach for command and control, communication, computer, intelligence, surveillance and reconnaissance（C^4ISR） communication. Primarily, a capability-based C^4ISR communication meta-concept model and a C^4ISR communication context meta-ontology are constructed. The context ontology is established under the constraints of the C^4ISR communication context meta-ontology, and furthermore, algorithms are proposed to support context reasoning based on description logic. A case study is presented to demonstrate applicability of the proposed method.

关键词： service intelligentizing C4ISR communication context ontology context reasoning

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STM and STS investigations of Ce-doped TiO_2 nanoparticles

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Rare Metals 2006年第4期25卷 331-336页

作者： hou Tinghong MAO Jian zhu Xiaodong TU Mingjing College of Materials Science and Engineering Sichuan University Chengdu 610064 China

Ce-doped titanium oxide nanoparticles were investigated in the paper. The surface structures of undoped and Ce-doped TiO2 nanoparticles were observed by scanning tunneling microscopy （STM）. The experimental results of scanning tunneling spectroscopy （STS） show that the surface electronic structures of TiO2 nanoparticles are modified by introducing new electronic states in the surface band gap through cerium ion doping. The results are discussed in terms of the influence of doping concentration on the surface band gap of TiO2.

关键词： semiconductor materials TiO2 nanoparticle STM/STS Ce-doping

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