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Improved corrosion resistance of dental Ti50Zr alloy with(TiZr)N coating in fluoridated acidic artificial saliva

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Rare Metals 2021年第10期40卷 2927-2936页

作者： wen-Fang cui Yang-Yang Dong Yong-Cun Bao Gao-Wu Qin Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China

The electrochemical corrosion behavior of the dental Ti50 Zr alloy with and without nanocrystalline(TiZr)N coating was comparatively investigated in artificial saliva solutions with different pH values and fluoride ion concentrations. The chemical stability of the passive films on the coated and non-coated Ti50 Zr alloy was evaluated by calculating passive film thickness. The chemical compositions and valence structures of the passive films were analyzed by X-ray photoelectron spectroscopy(XPS). The results show that the(TiZr)N-coated alloy displays distinctly decreased corrosion rate and increased impedance compared with Ti50 Zr alloy in nonfluoridated and fluoridated acidic solutions. Particularly, in the solution of pH = 3.9 and 0.15% NaF-containing, the corrosion protection efficiency of(TiZr)N coating reaches90%. The excellent corrosion resistance of the coated alloy is attributed to that the nanocrystallines in(TiZr)N coating decreases micropores and crack defects, which strongly impedes the corrosive ions diffusion and electrode process at Ti substrate/coating interface. Meanwhile,(TiZr)N coating shows good passivation behavior in acidic solution and active–passive transition behavior in fluoridated acidic solution. The coated Ti50 Zr alloy with high chemical stability has potential application prospect for dental implants.

关键词： Dental material Titanium alloy Nitride coating Fluoride Corrosion

Study of the puzzling abundance pattern of the neutron-capture elements in LMC star J053253.51–695915.1

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Research in Astronomy and Astrophysics 2020年第4期20卷 129-138页

作者： Wan-Qiang Han Lu Zhang Guo-Chao Yang wen-Yuan cui Fang wen Bo Zhang Department of Physics Hebei Normal UniversityShijiazhuang 050024China Department of Physics Shijiazhuang UniversityShijiazhuang 050035China College of Mathematics and Information Science Hebei Normal UniversityShijiazhuang 050024China School of Sciences Hebei University of Science and TechnologyShijiazhuang 050018China

Object J053253.51–695915.1(J053253)in the Large Magellanic Cloud(LMC)is reported as a young stellar object(YSO).Its chemical abundances reflect the initial composition of the gas cloud in which the star ***,the discovery that this star shows the enhancement of the neutron(n)-capture elements and the higher ratio of the heavier n-capture elements relative to the lighter n-capture elements is *** an abundance decomposed method,we explore the astrophysical origins of the n-capture elements in this *** find that the abundance characteristic of the higher ratio of the heavier n-capture elements to the lighter n-capture elements can be explained by the pollution of the r-process event and the contamination of the s-process material.

关键词： stars:abundances stars:chemically peculiar stars:individual:J053253.51–695915.1

Decentralized beamforming design and power allocation for limited coordinated multi-cell network

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The Journal of China Universities of Posts and Telecommunications 2013年第4期20卷 52-58,72页

作者： cui wen-tao NIU Kai LI Nan WU Wei-ling Key Laboratory of Universal Wireless Communication Ministry of Education Beijing University of Posts and Telecommunications School of Mechanical Electrical and Information Engineering Shandong University at Weihai

Multi-cell processing （MCP） is capable of providing significant performance gain, but this improvement is accompanied by dramatic signaling overhead between cooperative base stations. Therefore, balancing the performance gain and overhead growth is crucial for a practical multi-base cooperation scheme. In this paper, we propose a decentralized algorithm to jointly optimize the power allocation and beamforming vector with the goal of maximizing the system performance under the constraint of limited overhead signal and backhaul link capacity. In particular, combined with calculating the transmission beamforming vector according to the local channel state information, an adaptive power allocation is presented based on the result of sum capacity estimation. Furthermore, by utilizing the concept of cell clustering, the proposed framework can be implemented in a practical cellular system without major modification of network architecture. Simulation results demonstrate that the proposed scheme improves the system performance in terms of the sum capacity and cell-edge capacity.

关键词： MCP co-channel interference adaptive power allocation distributed beamforrning limited capacity backhauling

基于真实形貌的机械密封摩擦界面热力致损分析

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化工机械 2024年第1期51卷 90-96页

作者：崔雯王天瑞王在刚甘肃省特种设备安全技术检查中心陕西航天机电环境工程设计院有限责任公司

机械密封在运行时密封界面热力及摩擦状态多变,为了探究机械密封运行时的界面热力及磨损等特性,使用非接触3D形貌仪,获得摩擦界面微观形貌信息,逆向构造摩擦界面三维模型,基于该模型对密封环摩擦过程进行分析,进一步得出摩擦界面的Von M... 详细信息

机械密封在运行时密封界面热力及摩擦状态多变,为了探究机械密封运行时的界面热力及磨损等特性,使用非接触3D形貌仪,获得摩擦界面微观形貌信息,逆向构造摩擦界面三维模型,基于该模型对密封环摩擦过程进行分析,进一步得出摩擦界面的Von Mises应力、热源、振动、磨损区域、磨损量等相关特性。结果表明,在同一时刻SiC-SiC组的磨损面积均小于SiC-C组;SiC-C组摩擦界面的热源分布相比于SiC-SiC组更加复杂;密封环启动瞬间SiC-C组的法向加速度远大于SiC-SiC组;SiC-C组的磨损量约为SiC-SiC组的3倍。

关键词：机械密封热力磨损微凸体滑动接触摩擦界面

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螺旋藻风味酱的发酵工艺研究

中国调味品 2024年第8期49卷 69-73页

作者：薛宪辉李思雨郭睿崔文凯纪蓓山东科技大学化学与生物工程学院山东青岛266590

螺旋藻富含蛋白质、维生素和人体所需的各种微量元素,具有提高免疫力、抗贫血、预防高血脂等功效。以螺旋藻、面粉为主要原料进行发酵,使酱具有独特螺旋藻风味的同时提高了其营养价值。为获得螺旋藻风味酱的发酵工艺,研究不同因素对螺... 详细信息

螺旋藻富含蛋白质、维生素和人体所需的各种微量元素,具有提高免疫力、抗贫血、预防高血脂等功效。以螺旋藻、面粉为主要原料进行发酵,使酱具有独特螺旋藻风味的同时提高了其营养价值。为获得螺旋藻风味酱的发酵工艺,研究不同因素对螺旋藻风味酱发酵的影响,进行了单因素实验,得到最佳条件为料水比1∶1.25、藻面比100∶0、培养温度35℃、接种量0.1%、盐浓度13%、制曲时间72 h。在此基础上进行四因素三水平正交实验设计,对发酵工艺进行进一步研究。以氨基酸态氮含量作为指标,得到最佳工艺条件为料水比1∶1、藻面比90∶10、培养温度35℃、接种量0.05%、盐浓度13%、制曲时间72 h。进行验证实验,最佳条件下得到的螺旋藻风味酱酯香浓郁,黏稠适度,咸甜适口,氨基酸态氮含量达到(1.54±0.03)g/100 g。通过在酱料中加入不同香料炒制,得到多种口味的螺旋藻风味酱。

关键词：螺旋藻酱油曲精发酵工艺氨基酸态氮

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蜕膜样型乳腺肌纤维母细胞瘤1例报道并文献复习

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诊断病理学杂志 2024年第1期31卷 69-71页

作者：赖续文崔文志陈琳曾伟鹏王卓才王蔚中国人民解放军南部战区总医院病理科广州510010

乳腺肌纤维母细胞瘤(mammary myofibroblastoma,MFB)罕见,可能起源于具有多向间充质分化的乳腺间质干细胞[1-2],由Wargotz等[3]于1987年首次命名。近年来MFB形态谱系不断扩大。2008年Magro等[4]报道一例完全由蜕膜样细胞组成的MFB类型,... 详细信息

乳腺肌纤维母细胞瘤(mammary myofibroblastoma,MFB)罕见,可能起源于具有多向间充质分化的乳腺间质干细胞[1-2],由Wargotz等[3]于1987年首次命名。近年来MFB形态谱系不断扩大。2008年Magro等[4]报道一例完全由蜕膜样细胞组成的MFB类型,形态不同于上皮样型。

关键词：乳腺肿瘤肌纤维母细胞免疫组织化学超微病理鉴别

Self-induced collision risk of the Starlink constellation based on long-term orbital evolution analysis

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Astrodynamics 2023年第4期7卷 445-453页

作者： Wei Zhang Xiuhong Wang wen cui Zhi Zhao Sirui Chen Xi'an Satellite Control Center Xi'an 710043China

The deployment of mega constellations has had a significant effect on the compounding space debris environment,increasing the number of on-orbit objects in all conditions and damaging the stability of the space debris *** increased density of space objects is associated with an increased risk of on-orbit *** risk exists not only between a mega constellation and the space debris environment but also inside a mega *** this study,we used the Starlink constellation to investigate the self-induced collision risk caused by malfunctioning ***,we analyzed the conjunction condition between malfunctioning and operative satellites based on long-term orbital evolution *** collision probability was then calculated based on the conjunction analysis *** results show that malfunctioning satellites in Phase 1 cause an 86.2%self-induced collision probability based on a malfunctioning rate of 1%,which is close to the collision probability caused by objects larger than 6 cm during five years of ***,self-induced collisions are another important risk factor for the Starlink constellation.

关键词： Starlink constellation orbit evolution self-induced collision collision probability

Renal artery embolization in the treatment of urinary fistula after renal duplication:A case report and review of literature

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World Journal of Clinical Cases 2021年第13期9卷 3177-3184页

作者： Tao Yang Jun wen Tan-Tan Xu wen-Jing cui Jian Xu Department of Interventional Radiology Jinling HospitalMedical School of Nanjing UniversityNanjing 210029Jiangsu ProvinceChina Graduate School Xuzhou Medical UniversityXuzhou 221000Jiangsu ProvinceChina Department of Radiology The Affiliated Hospital of Nanjing University of Chinese MedicineNanjing 210029Jiangsu ProvinceChina

BACKGROUND Duplicate renal malformation is a congenital disease of the urinary system,with an incidence rate of 0.8%.Surgical treatment is suitable for symptomatic *** fistula is one of the complications of ***-term urinary fistula has a great impact on patients'*** SUMMARY This article mainly reports on a 47-year-old man with duplication of kidney deformity,long urinary fistula after partial nephrectomy,and no improvement after conservative *** have achieved positive results in the arterial embolization treatment of the residual renal artery,indicating that selective arterial embolization is a good way to treat urinary fistula after partial *** is worth noting that this patient violated the Weigert-Meyer law,which also gave us more *** Renal artery embolization may be a simple and safe method to treat urinary fistula inefficacy with conservative treatment.

关键词： Renal artery embolization Urinary leakage Urinary fistula Duplicate renal malformation Selective arterial embolization Case report

Amyloid precursor protein regulates 5-fluorouracil resistance in human hepatocellular carcinoma cells by inhibiting the mitochondrial apoptotic pathway

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2020年第3期21卷 234-245页

作者： Xiao-long WU Ying CHEN wen-cui KONG Zhong-quan ZHAO Department of Oncology 900 Hospital of the Joint Logistics TeamFuzhou 350025China

Hepatocellular carcinoma(HCC)is a malignant tumor with high morbidity and mortality *** accounts for the majority of primary liver cancer *** precursor protein(APP),a cell membrane protein,plays a vital role in the pathogenesis of Alzheimer’s disease,and has been found to be implicated in tumor growth and ***,to understand the relationship between APP and 5-fluorouracil(5-FU)resistance in liver cancer,Cell Counting Kit-8,apoptosis and cell cycle assays,western blotting,and reverse transcription-quantitative polymerase chain reaction(q PCR)analysis were *** results demonstrated that APP expression in Bel7402-5-FU cells was significantly up-regulated,as compared with that in Bel7402 *** successful construction of APP-silenced(si APP)and overexpressed(OE)Bel7402 cell lines,data revealed that the Bel7402-APP751-OE cell line was insensitive,while the Bel7402-si APP cell line was sensitive to 5-FU in comparison to the matched control ***,APP overexpression decreased,while APP silencing increased 5-FU-induced apoptosis in Bel7402 ***,APP overexpression and silencing can regulate the mitochondrial apoptotic pathway and the expression of apoptotic suppressor genes(B-cell lymphoma-2(Bcl-2)and B-cell lymphoma-extra large(Bcl-xl)).Taken together,these results preliminarily revealed that APP overexpression contributes to the resistance of liver cancer cells to 5-FU,providing a new perspective for drug resistance.

关键词： Amyloid precursor protein 5-Fluorouracil resistance Mitochondrial apoptotic pathway Hepatocellular carcinoma