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Integrating thin wall into block:A new scanning strategy for laser powder bed fusion of dense tungsten

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Journal of materials Science & Technology 2022年第25期120卷 167-171页

作者： Zhengang Xiong Ji Zou Zhaoyang Deng Jinhan Chen Wei Liu Yuchi Fan Minshi Wang Xiaoqing Zhao chunfeng Yu Dongdong Dong Wenyou ma Weimin Wang Zhengyi Fu State Key Laboratory of Advanced Technology for materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Institute of New materials Guangdong Academy of SciencesGuangzhou 510650China School of materials Science and Engineering Tsinghua UniversityBeijing 100084China Institute of Functional materials Donghua University201620China School of Metallurgy and materials University of BirminghamBeijing 100084China

Due to a combination of outstanding properties including high melting point,high density,low thermal expansion coefficient,low saturated vapor pressure and excellent thermal conductivity,tungsten(W)parts have been widely used as electrodes,heating elements,anti-scatter grids for Computed Tomography(CT)equipment,rocket nozzles and divertor materials for nuclear fusion[1].

关键词： powder thermal saturated

Mechanoluminescent hybrids from a natural resource for energy-related applications

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Infomat 2021年第11期3卷 1272-1284页

作者： chunfeng Wang Ronghua ma Dengfeng Peng Xianhu Liu Jing Li Boru Jin Aixian Shan Yu Fu Lin Dong Wenchao Gao Zhong Lin Wang Caofeng Pan Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingChina Key Laboratory of materials Processing and Mold(Ministry of Education) Henan Key Laboratory of Diamond Optoelectronic Materials and DevicesKey Laboratory of Material PhysicsMinistry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhouChina Beijing Advanced Innovation Center for materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceSchool of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijingChina Department of Civil Engineering Monash UniversityClaytonAustralia

Mechanoluminescent(ML)materials that directly convert mechanical energy into photon emission have emerged as promising candidates for various *** the recent advances in the development of both novel and conventional ML materials,the limited access to ML materials that simultaneously have the attributes of high brightness,low cost,self-recovery,and stability,and the lack of appropriate designs for constructing ML devices represent significant challenges that remain to be addressed to boost the practical application of ML ***,ML hybrids derived from a natural source,waste eggshell,with the aforementioned attributes are *** introduction of the eggshell not only enables the preparation of the hybrid in a simple and cost-effective manner but also contributes to the homochromatism(red,green,or blue emission),high brightness,and robustness of the resultant ML *** significant properties of the ML hybrids,together with the proposed structural design,such as porosity or core–shell structure,could expedite a series of mechanic-optical applications,including the self-luminous shoes for the conversion of human motions into light and light generators that efficiently harvest water wave *** fascinating properties,versatile designs,and the efficient protocol of“turning waste into treasure”of the ML hybrids represent significant advances in ML materials,promising a leap to the practical applications of this flouring material family.

关键词： blue energy harvesting eggshell waste mechanoluminescent hybrids smart sensing

一株高产纳豆激酶菌株的ARTP诱变育种及培养基的优化

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中国农学通报 2023年第9期39卷 115-122页

作者：潘冬梅张心青杨传伦田杰伟王红霞杨丹丹郭南南于帅帅韩立霞马春峰部丽群蔡倩倩郭中瑞黄河三角洲京博化工研究院有限公司山东滨州256500 山东京博控股集团有限公司山东滨州256500

旨在提高纳豆激酶发酵水平,扩大其作为新型的纤溶药物的生产应用。利用常温室压等离子体(ARTP)技术对一株产纳豆激酶的野生菌株P进行诱变;筛选获得一株具有稳定遗传性能的纳豆激酶优势突变株P501,纳豆激酶活力比野生菌株提高了1.02倍,... 详细信息

旨在提高纳豆激酶发酵水平,扩大其作为新型的纤溶药物的生产应用。利用常温室压等离子体(ARTP)技术对一株产纳豆激酶的野生菌株P进行诱变;筛选获得一株具有稳定遗传性能的纳豆激酶优势突变株P501,纳豆激酶活力比野生菌株提高了1.02倍,通过单因素实验、响应面实验对P501产纳豆激酶的发酵培养基进行优化,得到最佳发酵培养基为:葡萄糖30 g/L、玉米粉40 g/L、豆粕粉30 g/L、Na_(2)HPO_(4)3 g/L、K2HPO40.3 g/L、MgSO40.6 g/L、CaCl_(2)0.63 g/L、丝氨酸0.07 g/L、豆油0.61 g/L,经过验证实验,纳豆激酶活力最高为9691 Fu/mL,较基础发酵培养基提高了6.68倍。

关键词：纳豆激酶 ARTP诱变单因素实验响应面实验培养基优化

TWO-LEVEL METHOD FOR UNSTEADY NAVIER-STOKES EQUATIONS IN STREAM FUNCTION FORM

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Applied mathematics(A Journal of Chinese Universities) 2005年第1期20卷 105-120页

作者： Renchunfeng maYichen XuHui CollegeofScience Xi＇anJiaotongUniv.Xi＇an710049China. CollegeofScience Xi＇anJiaotongUniv.Xi＇an710049China.

Two-level finite element approximation to stream function form of unsteady Navier-Stokes equations is *** algorithm involves solving one nonlinear system on a coarse grid and one linear problem on a fine ***,the scaling between these two grid sizes is ***,stability and convergence aspects of a fully discrete scheme are *** last a numrical example is given whose results show that the algorithm proposed in this paper is effcient.

关键词： Navier-Stokes equations two-level method stream function approximation stability convergence.

掺加纤维对高模量沥青混合料柔韧性及路用性能影响研究

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功能材料 2019年第1期50卷 1164-1173,1177页

作者：马立杰杨春风河北工业大学土木与交通学院天津300401 华北理工大学建筑工程学院河北唐山063210

为了评价单纤维及交织化复合纤维对BRA改性高模量沥青混合料性能的增强作用,并揭示纤维对高模量沥青混合料的增柔增韧改性机理。采用半圆针入度试验、直接拉伸试验和直接剪切试验研究了纤维对高模量沥青柔韧性和剪切性能的影响,通过电... 详细信息

为了评价单纤维及交织化复合纤维对BRA改性高模量沥青混合料性能的增强作用,并揭示纤维对高模量沥青混合料的增柔增韧改性机理。采用半圆针入度试验、直接拉伸试验和直接剪切试验研究了纤维对高模量沥青柔韧性和剪切性能的影响,通过电子显微镜(SEM)分析了纤维BRA高模量沥青的表面形貌特征,并采用车辙试验、贯入剪切试验、低温弯曲试验、冻融劈裂、浸水马歇尔试验、间接拉伸疲劳试验和MMLS1/3加速加载试验评价了纤维高模量沥青混合料的各项性能。结果表明,掺加单纤维及交织化复合纤维能显著提高BRA高模量沥青的蠕变柔量和抗剪切强度;纤维的微观形貌差异决定了不同纤维原材料对高模量沥青及其混合料性能改善效果有一定侧重点,采用交织化纤维复配方案恰好实现了不同纤维对BRA改性沥青性能改善效果的叠加作用;m(木质素纤维)∶m(聚酯纤维)∶m(玄武岩纤维)=1∶2∶2组成的交织化纤维,其对高模量沥青混合料各项路用性能有较大提升并且更加均衡,改性效果更佳明显;交织化纤维方案对改善高模量沥青混合料低温抗裂性能、长期高温稳定性和抗疲劳耐久性方面有较好技术优越性。

关键词：道路工程高模量沥青混合料交织化复配纤维柔韧性路用性能

Correction: AHR mediates the Aflatoxin B1 toxicity associated with hepatocellular carcinoma

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Signal Transduction and Targeted Therapy 2022年第1期7卷 331-332页

作者： Qing Zhu Yarui ma Junbo Liang Zhewen Wei Mo Li Ying Zhang Mei Liu Huan He chunfeng Qu Jianqiang Cai Xiaobing Wang Yixin Zeng Yuchen Jiao State Key Laboratory of Molecular Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China Key Laboratory of Gene Editing Screening and R&D of Digestive System Tumor Drugs Chinese Academy of Medical Sciences Peking Union Medical College Beijing China State Key Laboratory of Oncology in South China Collaborative Innovation Center for Cancer Medicine Sun Yat-sen University Cancer Center Guangzhou China Department of Clinical Laboratory National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China State Key Laboratory of Medical Molecular Biology Institute of Basic Medical Sciences Chinese Academy of Medical Sciences School of Basic Medicine Peking Union Medical College Beijing China Department of Hepatobiliary Surgery National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China

Correction to:Signal Transduction and Targeted Therapy https://***/10.1038/s41392-021-00713-1 z published online 9 August 2021 After online publication of the article^(1),the authors noticed one inadvertent mistake occurred during the production process in Fig.7 that needs to be *** correct data are provided as *** key findings of the article are not affected by these *** original article has been corrected.

关键词： correction finding corrected

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基于最小二乘谐波拟合的置信水平计算方法

河南师范大学学报（自然科学版） 2016年第4期44卷 21-26页

作者：马民汪春峰河南师范大学数学与信息科学学院河南新乡453007

结合Lomb最小二乘谐波拟合的方法和Scargle归一化功率谱的置信水平的解析公式,给出了一种计算谐波拟合置信水平的方法.该方法的优势在于:直接计算拟合量的振幅,并给出拟合振幅的置信水平,物理意义明确;能够对多个频率进行扫描和拟合并... 详细信息

结合Lomb最小二乘谐波拟合的方法和Scargle归一化功率谱的置信水平的解析公式,给出了一种计算谐波拟合置信水平的方法.该方法的优势在于:直接计算拟合量的振幅,并给出拟合振幅的置信水平,物理意义明确;能够对多个频率进行扫描和拟合并给出各频率对应振幅的置信水平;通过对置信水平最大的频率进行拟合,获得时间序列的周期性变化规律.最后,通过数值试验说明了本方法的优势和实用性.

关键词：最小二乘法谐波拟合置信水平

Detecting Non-Stationarity for Auscultation Signal of Traditional Chinese Medicine

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Wuhan University Journal of Natural Sciences 2011年第1期16卷 83-87页

作者： YAN Jianjun SHEN Qingwei WANG Yiqin LI Fufeng GUO Rui CHEN chunfeng SHEN Yong Center for Mechatronics Engineering East China Universityof Science and Technology Shanghai 200237 China Center for Traditional Chinese Medicine InformationScience and Technology Shanghai University of TraditionalChinese Medicine Shanghai 201203 China

The information about the nonstationarity of the aus-cultation signal is utilized in this paper to objectively and auto-matically identify healthy people and patients with qi-deficiency or yin-deficiency. In order to characterize the nonstationarity of the sound signal,the nonlinear cross-prediction method is used to extract features from the signal. A feature selection method based on conditional mutual information maximization criterion （CMIM） is implemented to find an optimal feature set. By means of the support vector machine （SVM） classifier,three common states （healthy,qi-deficiency and yin-deficiency） in traditional Chinese medicine are distinguished using the feature set,and a satisfactory classification accuracy of 80% is achieved in the experiment. In conclusion,the analysis based on the nonstationarity of the sound signal provides an alternative and outstanding approach to the objective auscultation of traditional Chinese medicine （TCM）.

关键词： auscultation nonstationarity support vector ma-chine (SVM) traditional Chinese medicine (TCM)

Seroprevalence and Risk Factors of Toxoplasma Gondii Infection in Farmed Minks(Neovison vison) in Northeastern and Eastern China

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Seroprevalence and Risk Factors of Toxoplasma Gondii Infecti...