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Small intestinal hemangioma:Endoscopic or surgical intervention? A case report and review of literature

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World Journal of Gastrointestinal Oncology 2018年第12期10卷 516-521页

作者： Ping-Fang Hu Han Chen Xiao-hang wang Wei-Jun wang Ning Su Bin Shi Department of Gastroenterology Changzheng Hospital Second Military Medical University Department of General Surgery Hongkou Branch of Changhai Hospital Second Military Medical University Department of General Surgery Changzheng Hospital Second Military Medical University

BACKGROUND Hemangioma of the small intestine is a rare vascular malformation. Before the advent of capsule endoscopy(CE) and balloon-assisted enteroscopy(BAE), preoperative diagnosis of this disease was extremely *** SUMMARY In this study, we report a 24-year-old female with a large transmural small bowel cavernous hemangioma, which was diagnosed with CE and BAE preoperatively and removed successfully using minimally invasive surgery. Meanwhile, we perform a literature review of the studies about intestinal hemangiomas published after 2000. Literature review revealed that 91.9% of the lesions were diagnosed preoperatively by CE and/or BAE and 45.9% of them were treated endoscopically, which is a marked improvement compared to before 2000. Therefore, CE and BAE are useful modalities for the preoperative diagnosis of hemangiomas in the small intestine. CONCLUSION Endoscopic treatment of intestinal hemangioma is generally prudent and might be suitable for multiple, relatively small lesions.

关键词： Hemangioma Capsule endoscopy Balloonassisted enteroscopy Endoscopic intervention Surgery Case report

In situ rapid versatile method for the preparation of zirconium metal-organic framework filters

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Science China Chemistry 2022年第12期65卷 2462-2467页

作者： hang wang Xingmao Zhang Ruxin Yao Shuang Zhao Pengfei Zhao Ruile Yang Lin wang Yichao Huang Tong Wei Xiang Li Zhuangjun Fan Bo wang School of Materials Science and Engineering China University of PetroleumQingdao266580China Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials Key Laboratory of Cluster ScienceMinistry of EducationSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing100081China Key Laboratory of Magnetic Molecules&Magnetic Information Materials(Ministry of Education) Institute of Chemistry and CultureSchool of Chemistry&Material ScienceShanxi Normal UniversityTaiyuan030006China

The development of the rapid preparation of highly stable metal-organic framework(MOF)-based devices provides the possibility of meeting the increasing demands of MOF in industrial ***,MOFs experience poor processability and stable high-valence-metal(Ⅳ)-based MOFs favor forming either thermodynamically stable metal hydroxides or oxides during their growth and nucleation,which hinders their practical ***,we present a versatile deep eutectic solvent(DES)-assisted hot pressing method to in situ rapidly prepare six distinct zirconium-based MOF nanocrystals on fibers(denoted as Zr-MOFilters)within 20 min.A small amount of DES promotes MOF precursor contact and accelerates Zr-MOF *** and pressure facilitate the formation of Zr-MOFs onto desired *** situ1H nuclear magnetic resonance spectra and time-dependent Fourier-transform infrared spectra were conducted to elucidate the growth of Zr-MOF *** a proof-of-concept,the abilities of Zr-MOFilters for Cr_(2)O_(7)^(2−) and micro(nano)plastics removal have been *** strategy paves the way for the rapid fabrication of highly stable MOF-based devices and brings MOFs a step closer to practical application.

关键词： in situ UiO-66 DES hot pressing filter pollutant control

Relating atomic local structures and Curie temperature of NdFeB permanent magnets:an X-ray absorption spectroscopic study

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Rare Metals 2018年第11期37卷 983-988页

作者： Mu-Nan Yang hang wang Yong-Feng Hu Liu-Yi-Mei Yang Aimee Maclennan Bin Yang Institute of Engineering Research Jiangxi University of Scienceand Technology Canadian Light Source University of Saskatchewan

Relationship between atomic local structures and Curie temperature of NdFeB permanent magnets was investigated semi-quantitatively using synchrotron radiation technique. Fe K-edge X-ray absorption spectroscopy(XAS) was employed to study the local structure of Fe atoms for samples before and after doping Dy, Tb or Gd. It is found that the bond lengths and coordination numbers are changed. Thus, the exchange interaction between Fe atoms increases with Dy, Tb or Gd doping, resulting in the improvement of Curie temperature of NdFeB permanent magnets. The doping effect is proven by experimental measurement of the magnetic properties. Microstructural characterization using scanning electron microscopy(SEM) was also used to further analyze the effect of different rare earth elements doping on Curie temperature of NdFeB permanent magnets.

关键词： Permanent magnet Synchrotron radiation X-ray absorption fine structure Crystal structure Curie temperature

High-frequency magnetic properties of biphase Ce_(2)Fe_(17)N_(3)/α-Fe microflakes with easy-plane anisotropy

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Journal of Rare Earths 2024年第1期42卷 110-115,I0004页

作者： Ke wang hang Zhang Yuandong Huang Zhibiao Xu Fashen Li Tao wang Key Laboratory for Magnetism and Magnetic Materials of MOE Lanzhou UniversityLanzhou730000China Key Laboratory of Special Function Materials and Structure Design Ministry of EducationLanzhou UniversityLanzhou730000China

Soft magnetic composites(SMCs)are effective as magnetic powder cores in an *** to high saturation magnetization,large magnetocrystalline anisotropy and high operating frequency of M(metal)-RE(rear earth)soft magnetic composites,it is possible to miniaturize inductor cores by reducing total loss,especially eddy current loss and excess loss at high *** this article,the characteristics of Ce_(2)Fe_(17)N_(3)/α-Fe(CFN/F)loss per volume and effective permeability reaching a high frequency of 3 MHz are *** biphase CFN/F composite exhibits a high permeability of 16 at 70 MHz,which is two times greater than that of pure Ce_(2)Fe_(17)N_(3)(CFN)*** total loss is as low as 545 mW/cm^(3)at 3 MHz and 6 *** direct current(DC)-bias properties have a percent of permeability exceeding 65% at H=7960 A/*** phenomenon indicates that our material has a higher working frequency and lower core loss than other materials;the biphase CFN/F structure is a promising and efficient approach for developing the miniaturized radio frequency(RF)inductor core.

关键词： High frequency Soft magnetic composites Easy-plane anisotropy Permeability spectra Core loss Rare earths

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国家与行业小麦粉标准比对研究

中国标准化 2024年第7期 178-181页

作者：于步青汪一行王艳艳唐怀建河南工业大学粮食和物资储备学院

小麦粉标准是评判小麦粉优劣的重要依据,然而近些年行业内不同类型的小麦粉标准较多,在质量指标和理化指标等方面也存在诸多差异。本文对我国小麦粉的国家标准和行业标准的质量指标、理化指标等要求进行比对并分析其中差异,为提升我国... 详细信息

小麦粉标准是评判小麦粉优劣的重要依据,然而近些年行业内不同类型的小麦粉标准较多,在质量指标和理化指标等方面也存在诸多差异。本文对我国小麦粉的国家标准和行业标准的质量指标、理化指标等要求进行比对并分析其中差异,为提升我国小麦粉加工规范化和标准化提供参考,从而为推动我国小麦粉产业的健康、快速发展提供指导。

关键词：小麦粉国家标准行业标准

Theoretical and Experimental Study on the Performance of Hermetic Diaphragm Squeeze Film Dampers for Gas-Lubricated Bearings

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Chinese Journal of Mechanical Engineering 2024年第3期37卷 151-169页

作者： Jianwei wang Haoxi Zhang Shaocun Han hang Li Peng wang Kai Feng State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China

Low damping characteristics have always been a key sticking points in the development of gas *** application of squeeze film dampers can significantly improve the damping performance of gas lubricated *** paper proposed a novel hermetic diaphragm squeeze film damper(HDSFD)for oil-free turbomachinery supported by gas lubricated *** types of HDSFDs with symmetrical structure were proposed for good damping *** considering the compressibility of the damper fluid,based on hydraulic fluid mechanics theory,a dynamic model of HDSFDs under medium is proposed,which successfully reflects the frequency dependence of force *** on the dynamic model,the effects of damper fluid viscosity,bulk modulus of damper fluid,thickness of damper fluid film and plunger thickness on the dynamic stiffness and damping of HDSFDs were *** experimental test rig was assembled and series of experimental studies on HDSFDs were *** damper fluid transverse flow is added to the existing HDSFD concept,which aims to make the dynamic force coefficients independent of *** the force coefficient is still frequency dependent,the damping coefficient at high frequency excitation with damper fluid supply twice as that without damper fluid *** results serve as a benchmark for the calibration of analytical tools under development.

关键词： Hermetic diaphragm squeeze film damper Compressibility Dynamic model Experimental studies

热变形参数对TB15钛合金动态再结晶行为的影响

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塑性工程学报 2024年第1期31卷 50-59页

作者：董显娟张殿王宇航吴轩轩涂泽立魏科黄龙徐勇南昌航空大学航空制造工程学院江西南昌330063 江西星火军工工业有限公司江西南昌330000 南昌航空大学通航(民航)学院江西南昌330063

采用热模拟压缩试验机对TB15钛合金进行变形温度为810~930℃、应变速率为0.001~10 s^(-1)、压下量为60%的等温热压缩试验,研究了热变形参数对TB15钛合金动态再结晶行为的影响。结果表明:TB15钛合金不同应变速率下的应力-应变曲线呈现出... 详细信息

采用热模拟压缩试验机对TB15钛合金进行变形温度为810~930℃、应变速率为0.001~10 s^(-1)、压下量为60%的等温热压缩试验,研究了热变形参数对TB15钛合金动态再结晶行为的影响。结果表明:TB15钛合金不同应变速率下的应力-应变曲线呈现出不同特征。随应变速率增大,流动软化曲线呈现“V”型特征。当应变速率在0.001~0.1 s^(-1)范围时,随变形温度升高和应变速率减小,动态再结晶(DRX)体积分数和DRX晶粒尺寸增大,且DRX晶粒尺寸增幅较DRX体积分数更加显著。在低应变速率变形时,原始β晶粒被小角度晶界分成形状规整的多边形亚晶粒,小角度晶界通过连续吸收位错和渐进晶格旋转的方式向大角度晶界转变从而实现连续动态再结晶。随着应变速率增大,再结晶晶粒形核位置从原始β晶粒内部逐渐向晶界附近转移,在原始β晶界形成均匀细小的“项链状”再结晶晶粒,此时易于由晶界弓弯机制引发不连续动态再结晶。

关键词： TB15钛合金变形温度应变速率流动软化 DRX

Progress and challenges of electrolyte modulation in aqueous zinc-ion batteries

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Rare Metals 2024年第7期43卷 2940-2967页

作者： Qi-hang Yang Lu-Fei wang Xiao-Yu wang Meng-Meng Zhen Tianjin Key Laboratory of Clean Energy and Pollution Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin 300071China

As a new type of green battery system,aqueous zinc-ion batteries(AZIBs)have gradually become a research hotspot due to their low cost,high safety,excellent stability,high theoretical capacity(820 mAh·g^(-1))of zinc anode,and low redox potential(-0.76 V *** hydrogen electrode(SHE)).AZIBs have been expected to be an alternative to lithium-ion batteries for large-scale commercial energy storage ***,they are facing thorny issues such as degradation of cycling performance,zinc dendrites,and side *** the same time,these problems cause short cycling life of batteries,thus severely limiting their commercial *** recent years,many more researches have been conducted on the modification of anode and cathode materials of AZIBs,but there is a lack of in-depth discussion on the characteristics and mechanism of electrolyte *** this review,we will make a systematic summary of the current problems with two electrodes in AZIBs,as well as the types and functions of electrolyte ***,we further systematically describe the modulation mechanism of electrolyte additives in the performance of the cathode and *** prospects and development directions of additive modulation strategies for AZIBs electrolytes are prospected.

关键词： Electrolyte additives Aqueous zinc-ion batteries Zinc anode protection Cathode chemistry

基于物理参数和BP神经网络的9310钢本构模型研究

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塑性工程学报 2024年第8期31卷 117-124页

作者：王宇航罗拴谋董显娟徐勇黄龙涂泽立李佳俊南昌航空大学航空制造工程学院江西南昌330063 西安圣泰金属材料有限公司陕西西安712033 南昌航空大学通航学院江西南昌330063

采用Gleeble-3800热模拟试验机对9310钢进行了变形量为70%的等温恒应变速率压缩实验,在变形温度为800~1200℃、应变速率为0.01~50 s^(-1)的范围内研究了9310钢的热变形行为。通过不同热变形参数对自扩散系数D和杨氏模量E的影响,建立了... 详细信息

采用Gleeble-3800热模拟试验机对9310钢进行了变形量为70%的等温恒应变速率压缩实验,在变形温度为800~1200℃、应变速率为0.01~50 s^(-1)的范围内研究了9310钢的热变形行为。通过不同热变形参数对自扩散系数D和杨氏模量E的影响,建立了基于物理参数的本构模型,同时基于实验数据构建了BP神经网络本构模型。结果表明:9310钢为负温度正应变速率敏感性材料,且流动应力随变形温度的升高和应变速率的降低而减小。基于不同条件构建的物理本构模型和BP神经网络模型的相关系数r均大于0.98,但BP神经网络模型的r值可达0.996,平均绝对相对误差为3.1%。经过流动应力曲线、相关系数和平均绝对相对误差的综合对比,得出BP神经网络模型对预测9310钢的流动行为具有较好的适用性。

关键词： 9310钢热变形行为物理本构模型 BP神经网络模型