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Journal of Advanced Ceramics 2022年第3期11卷 392-402页

作者： Chao FENG Xu ZHOU Bingjing TAO Haitao WU shifeng huang Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of JinanJinan250022China School of Environmental and Material Engineering Yantai UniversityYantai264005China

Dense microwave dielectric ceramics of Ce_(2)[Zr_(1−x)(Al_(1/2)Ta_(1/2))_(x)]_(3)(MoO_(4))_(9)(CZMAT) (x = 0.02–0.10) were prepared by the conventional solid-state route. The effects of (Al1/2Ta1/2)^(4+) on their microstructures, sintering behaviors, and microwave dielectric properties were systematically investigated. On the basis of the X-ray diffraction (XRD) results, all the samples were matched well with Pr_(2)Zr_(3)(MoO_(4))_(9) structures, which belonged to the space group R3¯c. The lattice parameters were obtained using the Rietveld refinement method. The correlations between the chemical bond parameters and microwave dielectric properties were calculated and analyzed by using the Phillips—Van Vechten—Levine (P—V—L) theory. Excellent dielectric properties of Ce_(2)[Zr_(0.94)(Al_(1/2)Ta_(1/2))_(0.06)]_(3)(MoO_(4))_(9) with a relative permittivity (ε_(r)) of 10.46, quality factor (Q × f) of 83,796 GHz, and temperature coefficient of resonant frequency (τ_(f)) of −11.50 ppm/℃ were achieved at 850 ℃.

关键词： microwave dielectric ceramics Ce_(2)[Zr_(1−x)(Al_(1/2)Ta_(1/2))_(x)]_(3)(MoO_(4))_(9)(CZMAT) Phillips-Van Vechten-Levine(P-V-L)theory low sintering temperature

Harmonic reducer in-situ fault diagnosis for industrial robots based on deep learning

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Science China(Technological Sciences) 2022年第9期65卷 2116-2126页

作者： ZHOU Xing ZHOU HuiCheng HE YiMing huang shifeng ZHU ZhiHong CHEN JiHong School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Foshan Institute of Intelligent Equipment Technology Foshan 528234China

The harmonic reducer is an essential kinetic transmission component in the industrial *** is easy to be fatigued and resulted in physical malfunction after a long period of ***,an accurate in-situ fault diagnosis for the harmonic reducers in an industrial robot is especially *** paper proposes a fault diagnosis method based on deep learning for the harmonic reducer of industrial robots via consecutive time-domain vibration *** the sampling signals from industrial robots are long,narrow,and channel-independent,this method combined a 1-dimensional convolutional neural network with matrix kernels(1-D MCNN)adaptive *** adjusting the size of the convolution kernels,it can concentrate on the contextual feature extraction of consecutive time-domain data while retaining the ability to process the multi-channel fusion *** proposed method is examined on a physical industrial robot platform,which has achieved a prediction accuracy of99%.Its performance is appeared to be superior in comparison to the traditional 2-dimensional CNN,deep sparse automatic encoding network(DSAE),multilayer perceptual network(MLP),and support vector machine(SVM).

关键词： harmonic reducer industrial robots fault diagnosis convolutional neural network(CNN)

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Ultrahigh energy harvesting properties in Ag decorated potassium-sodium niobite particle-polymer composite

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Journal of Materiomics 2020年第2期6卷 355-363页

作者： Yu Huan Tao Wei Zhenxing Wang Hengtao Shen Xiujuan Lin shifeng huang Xiaohui Wang a School of Material Science and Engineering University of JinanJinan250022China Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of JinanJinan250022China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

Composite-type piezoelectric nanogenerator(PENG)can potentially provide power to the flexible electronics devices by harvesting the mechanical *** electricity output of the PENG is not entirely excavated until now because the polarization dipoles are not sufficiently aligned during the high-voltage poling *** this study,some Ag particles are attached on the(K_(0.4425)Na_(0.52)Li_(0.0375))(Nb_(0.86)Ta_(0.06)Sb_(0.08))O_(3)(KNN)piezoelectric particles and then they are mixed with multi-walled carbon nanotubes and polydimethylsiloxane to fabricate the PENG *** Ag particles can reduce the optimal poling electric field from 10 kV/mm down to 5 kV/*** PENG device with Ag particles poled at 5 kV/mm can generate the highest open-circuit voltage of 282 V,short-circuit voltage of 32.2 mA,and maximum instantaneous power of 3.5mW under the external mechanical stress of 10 kPa without timedependent degradation(only 27.9 V and 2.6 mA for the pure KNN-based PENG poled at 10 kV/mm).These are much better than previously reported composite-type *** electrical energy generated from the PENG(20mm×40 mm)can light up 40 white light emitting diodes instantaneously without any storage unit during the stomping stage.

关键词： Composite-type piezoelectric energy harvester Lead-free piezoelectric materials Ultrahigh electrical output Low poling electric field

Formation mechanisms of Ti_(3)(Si,Al)C_(2)/Al_(2)O_(3) composites from Ti_(3)AlC_(2) and SiO via low-temperature sintering

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Journal of Advanced Ceramics 2023年第1期12卷 93-110页

作者： Zhenyu ZHANG Jun JI Yingying CHEN Deli MA Sique CHEN Hailing YANG Guopu SHI Zhi WANG Mengyong SUN Fei CHEN shifeng huang Qinggang LI Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of JinanJinan 250022China School of Materials Science and Engineering University of JinanJinan 250022China Institute of China North Industries Group Yantai 264003China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Ti_(3)SiC_(2)/Al_(2)O_(3) composites have attracted attention due to their excellent mechanical and electromagnetic properties,but the high temperatures(≥1400℃)required for the densification of aluminum oxide(Al_(2)O_(3))leads to the decomposition of Ti_(3)SiC_(2).To address this issue,Ti_(3)(Si_(x)Al_(1−x))C2/Al_(2)O_(3)(x represents the Si content)composites were synthesized for the first time via hot-pressing(HP)sintering and current-assisted sintering(CAS)of mixed Ti_(3)AlC_(2) and silicon monoxide(SiO)powders at 1300 and 1200℃,*** approaches produced composites with x values greater than 0.9,indicating that the compositions of the prepared composites were similar to those of Ti_(3)SiC_(2)/Al_(2)O_(3) *** synthetic mechanism involved substitution and continuous interdiffusion of Al and Si *** composite prepared by CAS at 1200℃ was compacted,whereas the composite prepared by HP had a low *** low-temperature densification mechanism is attributed to the combined effects of amorphous SiO,liquid Al,and the high heating rates for *** flexural strength and hardness of the composite prepared by CAS were also comparable to those of compacted Ti_(3)SiC_(2)/Al_(2)O_(3) composites.

关键词： aluminum oxide(Al_(2)O_(3)) current-assisted sintering(CAS) silicon monoxide(SiO) Ti_(3)(Si Al)C_(2)

Flexible lead-free BFO-based dielectric capacitor with large energy density,superior thermal stability,and reliable bending endurance

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Journal of Materiomics 2020年第1期6卷 200-208页

作者： Changhong Yang Jin Qian Panpan Lv Haitao Wu Xiujuan Lin Kun Wang Jun Ouyang shifeng huang Xin Cheng Zhenxiang Cheng Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of JinanJinan250022China School of Materials Science and Engineering University of JinanJinan250022China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan250061China Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongInnovation CampusNorth WollongongNSW2500Australia

As an essential energy-stored device,the inorganic dielectric film capacitor plays an irreplaceable role in high-energy pulse power technology *** this work,propelled by the challenge of overcoming the bottlenecks of inflexibility and inferior energy storage density of the pure BiFeO3 films,the mica with high bendability and thermal stability is adopted as substrate,and the relaxor ferroelectric(Sr_(0.7)Bi_(0.2))TiO_(3) is introduced to form solid solution to introduce relaxor *** subsequently fabricated 0.3Bi(Fe_(0.95)Mn_(0.05))O_(3)-0.7(Sr_(0.7)Bi_(0.2))TiO_(3)(BFMO-SBT)thin film capacitor exhibits a high recoverable energy storage density(W_(rec)=61 J cm^(-3))and a high efficiency(η=75%)combined with a fast discharging rate(23.5 μs)due to the large polarization difference(ΔP=59.4 μC cm^(-2)),high breakdown strength(E_(b)=3000 kV cm^(-1)),and the strong relaxor dispersion(γ=1.78).Of particular importance is the capacitor presents excellent stability of energy storage performance,including a wide working temperature window of -50-200℃,fatigue endurance of 108 cycles,and frequency range of 500 Hz-20 ***,there are no obviously deteriorations on energy storage capability under various bending states and after 104 times of mechanical bending *** these results indicate that BFMO-SBT on mica film capacitor has potential application in the future flexible electronics.

关键词： Flexible BiFeO_(3)film Energy storage performance Wide temperature range Bending-endurance

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碳纤维硫铝酸盐水泥基机敏复合材料

复合材料学报 2005年第6期22卷 114-119页

作者：王守德黄世峰陈文程新武汉理工大学材料学院 430070 济南大学材料学院 250022

采用压制成型方法制备了碳纤维硫铝酸盐水泥基复合材料(Carbon Fiber Reinforced SulphoaluminateCement,简称CFRS)。用XRD和孔结构分析仪对复合材料的物相和孔径与孔体积的关系进行了分析,研究了不同碳纤维掺量对复合材料在单调压应力... 详细信息

采用压制成型方法制备了碳纤维硫铝酸盐水泥基复合材料(Carbon Fiber Reinforced SulphoaluminateCement,简称CFRS)。用XRD和孔结构分析仪对复合材料的物相和孔径与孔体积的关系进行了分析,研究了不同碳纤维掺量对复合材料在单调压应力和循环压应力下的机敏性能的影响。XRD和孔结构分析研究结果表明,压制成形的试样水化14天硫铝酸盐水泥水化仍不完全,试样结构致密,孔隙率较小,孔径基本小于0.9μm;单调压应力下机敏测试性能表明,碳纤维掺量为0.3%和0.5%的CFRS试样电容变化率与压应力近似成线性关系,机敏性能较好;循环压应力下碳纤维掺量为0.7%的CFRS试样电容变化率与循环压应力成一一对应关系,表现出较好的机敏特性。

关键词：碳纤维硫铝酸盐水泥机敏性能介电常数

传感器测试FRP约束混凝土轴压短柱的核心区应力

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复合材料学报 2015年第2期32卷 549-556页

作者：彭亚萍张颖黄世峰上海应用技术学院城市建设与安全工程学院上海201418 山东大卫国际建筑设计有限公司济南250002 济南大学土木建筑学院济南250022

提出了一种使用水泥基压电陶瓷传感器测试混凝土轴压短柱应力的新方法。将压电传感器埋入混凝土矩形短柱核心区,测试了纤维增强复合材料约束前后混凝土短柱的轴向动态疲劳载荷,建立了传感器输出信号与混凝土短柱核心区应力之间的数值模... 详细信息

提出了一种使用水泥基压电陶瓷传感器测试混凝土轴压短柱应力的新方法。将压电传感器埋入混凝土矩形短柱核心区,测试了纤维增强复合材料约束前后混凝土短柱的轴向动态疲劳载荷,建立了传感器输出信号与混凝土短柱核心区应力之间的数值模型,并将理论计算应力值与由模型推导出的应力值进行对比。结果表明:模型推导应力值与理论计算应力值基本吻合,验证了使用压电传感器测试动态载荷作用下混凝土短柱应力这一新方法的可行性。

关键词：纤维增强复合材料约束混凝土短柱应力水泥基压电陶瓷传感器

Breast cancer development and progression:Risk factors,cancer stem cells,signaling pathways,genomics,and molecular pathogenesis

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Genes & Diseases 2018年第3期5卷 77-106页

作者： Yixiao Feng Mia Spezia shifeng huang Chengfu Yuan Zongyue Zeng Linghuan Zhang Xiaojuan Ji Wei Liu Bo huang Wenping Luo Bo Liu Yan Lei Scott Du Akhila Vuppalapati Hue H.Luu Rex C.Haydon Tong-Chuan He Guosheng Ren Chongqing Key Laboratory of Molecular Oncology and Epigenetics Departments of General SurgeryClinical Laboratory MedicineOrthopaedic SurgeryPlastic Surgery and Burnand OtolaryngologyHead and Neck SurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Molecular Oncology Laboratory Department of Orthopaedic Surgery and Rehabilitation MedicineThe University of Chicago Medical CenterChicagoIL 60637USA Department of Biochemistry and Molecular Biology China Three Gorges University School of MedicineYichang 443002China Ministry of Education Key Laboratory of Diagnostic Medicine and School of Laboratory Medicine Chongqing Medical UniversityChongqing 400016China Stem Cell Biology and Therapy Laboratory Ministry of Education Key Laboratory of Child Development and DisordersThe Children’s Hospital of Chongqing Medical UniversityChongqing 400014China Department of Clinical Laboratory Medicine The Second Affiliated Hospital of Nanchang UniversityNanchang 330006China Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences The Affiliated Hospital of StomatologyChongqing Medical UniversityChongqing 401147China Student Inquiry Research Program Illinois Mathematics and Science Academy(IMSA)AuroraIL 60506USA

As the most commonly occurring cancer in women worldwide,breast cancer poses a formidable public health challenge on a global *** cancer consists of a group of biologically and molecularly heterogeneous diseases originated from the *** the risk factors associated with this cancer varies with respect to other cancers,genetic predisposition,most notably mutations in BRCA1 or BRCA2 gene,is an important causative factor for this *** cancers can begin in different areas of the breast,such as the ducts,the lobules,or the tissue in *** the large group of diverse breast carcinomas,there are various denoted types of breast cancer based on their invasiveness relative to the primary tumor *** is important to distinguish between the various subtypes because they have different prognoses and treatment *** there are remarkable parallels between normal development and breast cancer progression at the molecular level,it has been postulated that breast cancer may be derived from mammary cancer stem *** breast development and mammary stem cells are regulated by several signaling pathways,such as estrogen receptors(ERs),HER2,and Wnt/b-catenin signaling pathways,which control stem cell proliferation,cell death,cell differentiation,and cell ***,emerging evidence indicates that epigenetic regulations and noncoding RNAs may play important roles in breast cancer development and may contribute to the heterogeneity and metastatic aspects of breast cancer,especially for triple-negative breast *** review provides a comprehensive survey of the molecular,cellular and genetic aspects of breast cancer.

关键词： BRCA1/2 Breast cancer Cancer stem cells Estrogen receptors HER2 Noncoding RNAs Triple-negative breast cancer Tumor heterogeneity

六关节工业机器人TCP标定模型研究与算法改进

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机械工程学报 2019年第11期55卷 186-196页

作者：周星黄石峰朱志红佛山智能装备技术研究院佛山528225 华中科技大学国家数控系统工程技术研究中心武汉430074

研究了六关节工业机器人工具坐标系原点TCP的标定原理,提出了TCP标定的解析化模型和几何模型,并对标定误差来源进行了综合性分析,定量分析了标定点数和标定位姿对TCP标定精度的影响。在经典四点法标定的基础上,引入了误差阈值的概念,提... 详细信息

研究了六关节工业机器人工具坐标系原点TCP的标定原理,提出了TCP标定的解析化模型和几何模型,并对标定误差来源进行了综合性分析,定量分析了标定点数和标定位姿对TCP标定精度的影响。在经典四点法标定的基础上,引入了误差阈值的概念,提出一种改进的“五点选优TCP标定算法”,并进行了仿真验证和实物验证。验证结果表明,提出的标定算法能够有效筛选出误差偏大的点,对标定精度能进一步提高,可靠性也得到了进一步保证。

关键词：六关节工业机器人 TCP标定标定点数标定位姿解析化模型与几何模型选优

Nosocomial spread of imipenem-resistant Acinetobacter baumannii carrying OXA-23 gene with upstream ISAba1 in a Chinese hospital

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Nosocomial spread of imipenem-resistant Acinetobacter bauman...