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Analytical modeling of geometric errors induced by cutter runout and tool path optimization for five-axis flank machining

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Science China(Technological Sciences) 2011年第12期54卷 3180-3190页

作者： guo qiang SUN YuWen guo DongMing Key Laboratory for Precision and Non-Traditional Machining Technology of the Ministry of Education Dalian University of Technology Dalian 116024 China

The cutter runout effect has significant influence on the shape of cutter swept surface and the machining surface quality. Hence,it is necessary to integrate the cutter runout effect in cutter swept surface modeling,geometric error prediction and tool path optimization for five-axis flank machining. In this paper,an envelope surface model considering cutter runout effect is first established,and geometric errors induced by runout effect are derived based on the relative motion analysis between the cutter and part in machining. In the model,the cutter runout is defined by four parameters,including inclination angle,location angle,offset value and the length of cutter axis. Then the runout parameters are integrated into the rotation surface of each cutting edge that is used to form the final cutter envelope surface for the five-axis machining process. Thus,the final resulting geometric errors of the machined surface induced by cutter runout can be obtained through computing the deviations from the nominal cutter swept surface. To reduce these errors,an iterative least square method is used to optimize the tool paths for five-axis flank machining. Finally,a validation example is given for a specific ruled surface. Results show the effectiveness and feasibility of the analytical model of geometric errors induced by cutter runout,and also show that the geometric errors can be reduced significantly using the proposed tool path planning method.

关键词： cutter runout tool path optimization envelope surface five-axis machining geometric errors

High-performance Cu_(0.95)V_(2)O_(5) nanoflowers as cathode materials for aqueous zinc-ion batteries

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Rare Metals 2022年第1期41卷 29-36页

作者： Xin Yu Fang Hu Zhi-qiang guo Lei Liu Gui-hong Song Kai Zhu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Weifang City Planning&Design Institute Weifang 261000China Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150010China

Exploring high-performance cathode materials for aqueous zinc ion batteries(ZIBs)is still one of the critical *** vanadate compound has become a potential cathode material for ZIBs with a novel displacement reaction mechanism of reversible reduction/oxidation of Cu^(2+)/Cu^(0).Herein,we reported Cu_(0.95)V_(2)O_(5)nanoflowers prepared using a hydrothermal synthesis method as a capable cathode material for *** Cu_(0.95)V_(2)O_(5)nanoflowers exhibit high specific capacity of 405 mAh·g^(-1) at the current density of 100 mA·g^(-1),benefiting from the displacement reaction mechanism and phase transformation mechanism from Cu_(0.95)V_(2)O_(5)to the open and stable architecture Cu_(0.4)V_(2)O_(5)and Zn3(OH)2V2O7·2H2O *** cathode exhibits excellent rate performance with a high capacity of-200 mAh·g^(-1)at 5 A·g^(-1) and outstanding cycle stability with a capacity retention of 92%after 1000 *** is anticipated that the novel Cu_(0.95)V_(2)O_(5)nanoflowers are promising cathode material in the application for zinc ion batteries.

关键词： flowers performance cathode

Influence exerted by bone-containing target body on thermoacoustic imaging with current injection

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Chinese Physics B 2019年第4期28卷 230-241页

作者： Yan-hong Li guo-qiang Liu Jia-Xiang Song Hui Xia Institute of Electrical Engineering Chinese Academy of Sciences University of Chinese Academy of Sciences

Thermoacoustic imaging with current injection(TAI-CI) is a novel imaging technology that couples with electromagnetic and acoustic research, which combines the advantages of high contrast of the electrical impedance tomography and the high spatial resolution of sonography, and therefore has the potential for early diagnosis. To verify the feasibility of TAI-CI for complex bone-containing biological tissues, the principle of TAI-CI and the coupling characteristics of fluid and solid were analyzed. Meanwhile, thermoacoustic(TA) effects for fluid model and fluid–solid coupling model were analyzed by numerical simulations. Moreover, we conducted experiments on animal cartilage, hard bone and biological soft tissue phantom with low conductivity(0.5 S/m). By injecting a current into the phantom, the thermoacoustic signal was detected by the ultrasonic transducer with a center frequency of 1 MHz, thereby the B-scan image of the objects was obtained. The B-scan image of the cartilage experiment accurately reflects the distribution of cartilage and gel, and the hard bone has a certain attenuation effect on the acoustic signal. However, compared with the ultrasonic imaging, the thermoacoustic signal is only attenuated during the outward propagation. Even in this case, a clear image can still be obtained and the images can reflect the change of the conductivity of the gel. This study confirmed the feasibility of TAI-CI for the imaging of biological tissue under the presence of cartilage and the bone. The novel TAI-CI method provides further evidence that it can be used in the diagnosis of human diseases.

关键词： biomedical imaging thermo-acoustic imaging fluid–solid coupling low conductivity

Recent Advances in Pd-Catalyzed Reactions Involving the “On-Water” Mechanism

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Chinese Journal of Chemistry 2024年第5期42卷 533-542页

作者： Dong Wei guo-qiang Lin State Key Laboratory of Systems Medicine for Cancer Shanghai Cancer InstituteShanghai Key Laboratory of Systems Regulation and Clinical Translation for CancerRen Ji HospitalShanghai Jiao Tong University School of MedicineShanghai200127 China State Key Laboratory of Chemical Biology Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai200032 China

As the chemical industry grapples with the need for more eco-friendly practices,the use of water as a reaction medium is gaining attraction in organic *** mini-review delves into Pd-catalyzed reactions that utilize the "on-water" mechanism,spanning from 2019 to late *** reactions are neatly categorized into several types: (A) Catalytic C—H activations,(B) Mizoroki- Heck-type reactions,(C) Suzuki-Miyaura reactions,and (D) Cyclization *** showcasing the potential of water as a sustainable reaction medium for organic transformations,these reactions leave no doubt about the importance of embracing eco-friendly practices in the chemical *** Scientists In 1980,a seminal work by Breslow et *** an acceleration of reaction rate in the Diels-Alder *** and co-workers noted a significant increase in the rate of the [2σ+2σ+2π] cycloaddition of quadricyclane and dimethyl azodicarboxylate (DMAD) when the reaction was conducted in water,as opposed to when it was carried out in organic *** term "on-water" was then coined to describe this *** strategy was further expanded to transition-metal catalyzed transformations by Ackermann in ***,Varma and Leazer disclosed a Pd-catalyzed Mizoroki-Heck type arylation of alkenes with diaryliodonium salts “on-water”.The enantioselective version of "on-water" process was not realized until 2014 by the Zhou *** on,the Schaub group described a Pd-catalyzed Suzuki–Miyaura coupling reaction of electron-poor aryl chlorides with water,using only 50 ppm of catalyst *** recently,Liu and Lin extended the "on-water" strategy to Pd-catalyzed double Mizoroki-Heck *** mini-review has focused on Pd-catalyzed reactions involving the “on-water” mechanism.

关键词： Pd-catalyzed “On-water” Green chemistry Aqueous reactions Mechanism Methodology and reactions Mizoroki-Heck reaction Cross-coupling

Ultra-stable carbon-coated sodium vanadium phosphate as cathode material for sodium-ion battery

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Rare Metals 2022年第1期41卷 115-124页

作者： Di Wang Peng Cai guo-qiang Zou hong-Shuai Hou Xiao-Bo Ji Ye Tian Zhen Long Tianjin Key Laboratory of Functional Crystal Materials Institute of Functional CrystalTianjin University of TechnologyTianjin 300384China College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

Based on the excellent sodium ion mobility of sodium superionic conductor structures,Na_(3)V_(2)(PO_(4))_(3)materials have become promising cathode materials in sodium-ion batteries(SIBs).However,inadequate electronic transport of Na_(3)V_(2)(PO_(4))_(3)limits the cycling stability and rate performances in *** this work,high-performance conductive carbon-coated Na_(3)V_(2)(PO_(4))_(3)materials are obtained via a simple and facile ball-milling assisted solid-state method by utilizing citric acid as carbon *** carbon-coated composite electrodes display a high initial specific capacity of 111.6 mAh·g^(-1),and the specific capacity could retention reach 92.83%after 100 cycles at 1C with the high coulombic efficiency(99.95%).More importantly,the capacity of conductive carbon-coated nano-sized Na_(3)V_(2)(PO_(4))_(3)can remain 48.5 mAh·g^(-1) at 10℃after 3000 cycles(initial capacity of 101.2 mAh·g^(-1)).At the same time,high coulombic efficiency(near 100%)has little decay even at a high rate of 20℃during 1000 cycles,demonstrating the excellent cycling stability and remarkable rate performances,and showing potential in largescale productions and applications.

关键词： Na_(3)V_(2)(PO_(4))_(3) Sodium superionic conductor structures Ball-milling Cathode Sodium-ion battery

Detection,isolation,and identification of cadmium-resistant bacteria based on PCR-DGGE

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Journal of Environmental Sciences 2007年第9期19卷 1114-1119页

作者： HU Qing DOU Min-na QI hong-yan XIE Xiang-ming ZHUANG guo-qiang YANG Min Department of Environmental Biotechnology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. Biology Science and Technology College Beijing Forestry University Beijing 100083 China

This study focused on the screening of cadmium-resistant bacterial strains from Pb-Zn tailing. We investigated the diversity of microbial community inhabiting Dong-san-cha Pb-Zn tailing in Beijing, China, by polymerase chain reaction-denaturing gradient gel electrophoresis （DGGE） of 16S rRNA gene of bacterial strain, and found two dominant strains in the DGGE profile. Using special culture media, we isolated two strong cadmium-resistant bacterial strains. On the basis of morphological, physiological, and biochemical characteristics, BIOLOG, and 16S rDNA sequencing, the two strains were identified as Bacillus cereus and Enterobacter cloacae. Minimal inhibitory concentrations （MICs） of heavy metals for the bacteria were determined. E. cloacae showed higher MIC values for heavy metals and a larger range of antibiotic resistance than B. cereus.

关键词： Bacillus cereus Enterobacter cloacae PCR-DGGE cadmium resistance antibiotic resistance

Protective effect of high-oleic acid peanut oil and extra-virgin olive oil in rats with diet-induced metabolic syndrome by regulating branched-chain amino acids metabolism

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Journal of Integrative Agriculture 2022年第3期21卷 878-891页

作者： ZHAO Zhi-hao SHI Ai-min guo Rui LIU hong-zhi HU Hui WANG qiang Institute of Food Science and Technology Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products ProcessingMinistry of Agriculture and Rural AffairsBeijing 100193P.R.China Collaborative Innovation Center for Modern Grain Circulation and Safety College of Food Science and EngineeringNanjing University of Finance and EconomicsNanjing 210023P.R.China

High-oleic acid peanut oil(HOPO)and extra-virgin olive oil(EVOO)have been reported previously to have an attenuating effect on metabolic syndrome(MS).This study aimed to evaluate the metabolic effect of HOPO and EVOO supplementation in attenuating MS and the role of gut microbiota in regulating the metabolic ***-Dawley rats were continuously fed with a normal diet,high-fructose and high-fat(HFHF)diet,HFHF diet containing HOPO,or a HFHF diet containing EVOO for 12 *** metabolomics profiles of feces and serum samples were compared using untargeted metabolomics based on UPLC-Q/*** Least Squares Discriminant Analysis(PLS-DA)was used to identify the potential fecal and serum biomarkers from different *** between gut microbiota and biomarkers was assessed,and pathway analysis of serum biomarkers was *** in metabolic patterns in feces and serum were observed among different *** were 8 and 12 potential biomarkers in feces and 15 and 6 potential biomarkers in serum of HOPO group and EVOO group,respectively,suggesting that HOPO and EVOO supplementation mainly altered amino acids,peptides,and their analogs in feces and *** branched-chain amino acids(BCAAs)biosynthesis pathway was identified as a major pathway regulated by HOPO or *** study suggests that HOPO and EVOO supplementation ameliorate diet-induced MS,mainly via modulation of the BCAAs biosynthesis pathway.

关键词： metabolic syndrome high-oleic acid peanut oil extra-virgin olive oil metabolomics UPLC-Q/TOF-MS

Model Based Adaptive Control and Disturbance Compensation for Underwater Vehicles

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Chinese Journal of Mechanical Engineering 2018年第1期31卷 114-126页

作者： Hai Huang guo-Cheng Zhang Ji-Yong Li qiang Zhang Jin-Yu Xu hong-De Qin National Key Laboratory of Science and Technology on Autonomous Underwater Vehicle Harbin Engineering University

Underwater vehicles are being emphasized as highly integrated and intelligent devices for a significant number of oceanic operations. However, their precise operation is usually hindered by disturbances from a tether or manipulator because their propellers are unable to realize a stable suspension. A dynamic multi-body model-based adaptive controller was designed to allow the controller of the vehicle to observe and compensate for disturbances from a tether or manipulator. Disturbances, including those from a tether or manipulator, are deduced for the observation of the controller. An analysis of a tether disturbance covers the conditions of the surface, the underwater area, and the vehicle end point. Interactions between the vehicle and manipulator are mainly composed of coupling forces and restoring *** verify the robustness of the controller, path-following experiments on a streamlined autonomous underwater vehicle experiencing various disturbances were conducted in Song Hua Lake in China. Furthermore,path-following experiments for a tethered open frame remote operated vehicle were verified for accurate cruising with a controller and an observer, and vehicle and manipulator coordinate motion control during the simulation and experiments verified the effectiveness of the controller and observer for underwater operation. This study provides instructions for the control of an underwater vehicle experiencing disturbances from a tether or manipulator.

关键词： Underwater vehicle Adaptive control Disturbance observer Multi-body dynamic model

Evolution of microstructure,mechanical and magnetic properties of electrodeposited 50% Ni-Fe alloy foil after thermal treatment

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Journal of Iron and Steel Research International 2017年第8期24卷 844-851页

作者： hong-ru Ren Jin-tao Gao Zhe Wang Chong Li Fu-qiang Wang Zhan-cheng guo State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

In order to expand the application of the electrodeposited Ni-Fe alloy foil,their mechanical and magnetic properties were studied after heat *** development of grain growth during annealing was in-situ online investigated using a heating stage microscope,and the texture was analyzed via X-ray diffraction（XRD）and electron back-scattered diffraction（EBSD）.The results indicated that abnormal grain growth usually occurred during annealing at 1000-1050°***{111}oriented grains preferentially grew as the annealing temperature and holding time *** plasticities of the electrodeposited Ni-Fe alloy foils after heat treatment were better than those of the original *** excellent ductility was obtained without a loss in magnetic properties after annealing at 1100°C for 6h.

关键词： Electrodeposited Ni-Fe alloy foil Mechanical property Magnetic property Annealing