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International Journal of Minerals,Metallurgy and Materials 2015年第9期22卷 956-965页

作者： Hai-tao Jiang qiang Kang xiao-qian yan National Engineering Research Center for Advanced Rolling Technology University of Science and Technology Beijing China Railway Materials Technologies Company Limited

This article introduces an element diffusion behavior model for a titanium/steel explosive clad plate characterized by a typical curved interface during the heat-treatment process. A series of heat-treatment experiments were conducted in the temperature range from 750℃ to 950℃, and the effects of heat-treatment parameters on the microstructural evolution and diffusion behavior were investigated by optical microscopy, scanning electron microscopy, X-ray diffraction analysis, and electron-probe microanalysis. Carbon atoms within the steel matrix were observed to diffuse toward the titanium matrix and to aggregate at the bonding interface at 850℃ or lower; in contrast, when the temperature exceeded 850℃, the mutual diffusion of Ti and Fe occurred, along with the diffusion of C atoms, resulting in the for- marion of Ti-Fe intermetallics （Fe2Ti/FeTi）. The diffusion distances of C, Ti, and Fe atoms increased with increasing heating temperature and/or holding time. On the basis of this diffusion behavior, a novel diffusion model was proposed. This model considers the effects of various factors, including the curvature radius of the curved interface, the diffusion coefficient, the heating temperature, and the holding rime. The experimental results show good agreement with the calculated values. The proposed model could clearly provide a general prediction of the elements＇ diffusion at both straight and curved interfaces.

关键词： explosive bonding metal cladding diffusion models interfaces heat treatment

Microstructure and mechanical properties of HIP-ZTC4 during thermal exposure and tensile deformation

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Rare Metals 2015年第10期34卷 692-697页

作者： Hai-Tao Jiang xiao-qian yan Ji-Xiong Liu xiao-Ge Duan Shang-Wu Zeng National Engineering Research Center for Advanced Rolling Technology University of Science and Technology Beijing Baoti Research Institute Baoti Group Co.Ltd.

Casting titanium alloy TC4(ZTC4) after hot isostatic pressing(HIP) is one of the preferred materials in the field of aerospace manufacturing. In this paper, HIPZTC4 after a long-term thermal exposure was *** order to evaluate the variation of mechanical properties with service time, the tensile properties of this alloy after exposure at 400 °C for 100, 500, and 1,000 h were investigated. Microstructure of samples was observed by the means of optical microscopy(OM), scanning electron microscopy(SEM), and transmission electron microscopy(TEM). Tensile test was carried out under different test temperatures and fracture appearance was studied. The results show that the strength increases with exposure time due to the harder a2(Ti3Al) phase precipitated in the a phase and superficial oxygen layer formed, which results in the fact that the resistance of crack propagation could be increased and cracks first initiate between surface oxidation and the matrix. Besides, the tensile temperature also has a significant effect on the mechanical properties of HIPZTC4. The yield strength and tensile strength decrease with the increase of tensile temperature, while the total elongation increases.

关键词： Casting titanium alloy Microstructure Mechanical p

High-temperature deformation behavior of titanium clad steel plate

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Rare Metals 2015年第11期34卷 764-769页

作者： Shang-Wu Zeng Ai-Min Zhao Hai-Tao Jiang xiao-qian yan Ji-Xiong Liu xiao-Ge Duan Engineering Research Institute University of Science and Technology Beijing Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Baoti Research Institute Baoti Group Co. Ltd.

In this paper, the single-pass hot compression experiment of titanium clad steel plate was carried out by Gleeble-3500 thermal mechanics simulation test machine,and the effect of deformation temperature(T), strain rate(ε),thickness ratio(k), and friction coefficient(l) on flow pattern of the metal and stress in the deformation zone was *** results show that the metal flow behavior and the stress during compressive deformation depend strongly on the deformation temperature. At 800 and 850 °C, the bimetal can flow uniformly, while at 900 °C, the TA2 flows faster than Q235 B, and the phenomenon of TA2 wrapping Q235 B is observed. The metal flow of the bimetal material will coordinate each other through the bonding interface. It is noted that the stress increases with the increase of the ε and l and decreases when the metal flows along the contact area.

关键词： Titanium clad steel plate Hot deformation simulati

Alternate freezing and thawing enhanced the sediment and nutrient runoff loss in the restored soil of the alpine mining area

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Journal of Mountain Science 2022年第6期19卷 1823-1837页

作者： LI Fa-Yong LUO Ren-jie YOU Yong-jun HU Xue-fei qian xiao-yan ZHANG Peng-yan WANG Shan LI Guo-yu KAMEL Mohamed Eltohamy College of Water Resources and Architectural Engineering Tarim UniversityAral City 843300China State Key Laboratory of Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Water Relations and Field Irrigation Department Agricultural and Biological Research DivisionNational Research CentreCairo 12622Egypt

This study highlights the influence of freezing-thawing processes on soil erosion in an alpine mine restoration area. Accordingly, a series of simulation experiments were conducted to investigate runoff, sediment, and nutrient losses, and potential influencing factors under freeze-thaw(FT) conditions. Three FT treatments(i.e., 0, 3, and 5 FT cycles), and two soil moisture contents(SMCs;i.e., 10% and 20% SMC on a gravimetric basis) were assessed. The runoff, sediment yield, ammonia nitrogen(AN), nitrate nitrogen(NN), total phosphorus(TP), and dissolved phosphorus(DP) losses from runoff were characterized under different rainfall durations. The fitting results indicated that the runoff rate and sediment rate, AN, NN, TP, and DP concentrations in runoff could be described by exponential functions. FT action increased the total runoff volume and sediment yield by 14.6%–26.0% and 8.8%–35.2%, respectively. The runoff rate and sediment rate increased rapidly with the increment of FT cycles before stabilizing. At 20% SMC, the total runoff volume and sediment yield were significantly higher than those at 10% SMC. The loss curves of AN and NN concentrations varied due to differences in their chemical properties. FT action and high SMC promoted AN and NN losses, whereas the FT cycles had little effect. FT action increased TP and DP losses by 60.2%–220.1% and 48.4%–129.8%, respectively, compared to cases with no FT action;the highest TP and DP losses were recorded at 20% SMC. This study provides a deep understanding of freezing-thawing mechanisms in the soils of alpine mine restoration areas and the influencing factors of these mechanisms on soil erosion, thereby supporting the development of erosion prevention and control measures in alpine mine restoration areas.

关键词： Freezing and thawing Mine restoration area nitrogen loss Phosphorus loss Rainfall simulation Soil moisture content

Comprehension and Experience of Acne Treated with Traditional Chinese Medicine Facial Mask of Bai Zhi (<i>Radix Angelicae Formosanae</i>) and Bai Fu Zi (<i>Rhizoma Typhonii Gigantei</i>) as the Basis Formula by External Application

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Chinese Medicine 2012年第2期3卷 87-93页

作者： Soo Min Teoh Sheng yan Xi yan Hui Wang xiao yan qian Department of Traditional Chinese Medicine of Medical College Xiamen University Xiamen China

Acne is a kind of commonly-encountered and frequently-occurring disease that influences people’s beautiful outlook and mood easily. Acne’s etiological factors are related closely to living habits, food habits, psychological factor, environmental factor, endocrine, genetic factor, improper use to cosmetics, and so on. Under the condition of worrying about that chemical drugs treatment induces another kind of sequelae, the cosmetology of traditional Chinese medicine has been more and more paid attention. For the non-fine mouthfeel by TCM oral use and the inconvenience of decocting, the application of external treatment with traditional Chinese medicine facial mask has been more widespread. The traditional Chinese medicine facial mask of Baizhi (Radix Angelicae Formosanae) and Baifuzi (Rhizoma Typhonii Gigantei) as the basis formula can directly protect, recondition and ameliorate acne.

关键词： Comprehension Experience Acne Radix Angelicae Formosanae Rhizoma Typhonii Gigantei Traditional Chinese Medicine Facial Mask Traditional Chinese Medicine Treatment

Ovarian Damages Produced by Aerosolized Fine Particulate Matter （PM2.5） Pollution in Mice： Possible Protective Medications and Mechanisms

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Chinese Medical Journal 2017年第12期130卷 1400-1410页

作者： Hui-Fang Gai Jian-Xiong An xiao-yan qian Yong-Jie Wei John P Williams Guo-Lan Gao Department of Clinical Medicine Weifang Medical University Weifang Shandong 261000 China Department of Obstetrics and Gynecology Aviation General Hospital of China Medical University and Beijing Institute of Translational Medicine Chinese Academy of Sciences Beijing 100012 China Department of Anesthesiology Pain Medicine and Critical Care Medicine Aviation General Hospital of China Medical University and Beijing Translational Medicine Chinese Academy of Sciences Beijing 100012 China Laboratory of Environmental Criteria and Risk Assessment and Environmental Standards Institute Chinese Research Academy of Environmental Sciences Beijing 100012 China Department of Anesthesiology University of Pittsburgh School of Medicine Pittsburgh PA 15213 USA

Background： Ambient aerosol fine particulate matter （PM2.5） is associated with male reproductive toxicity in experiments and may have adverse effects in the female. However, studies evaluating the protective effects and precise mechanisms of aspirin, Vitamin C, Vitamin E, or ozone against toxic effects of PM2.5 are sparse. This study was conducted to investigate the possible protective effects and mechanisms of aspirin, Vitamin C, Vitamin E, or ozone on fertility in female mice treated with PM2.5, Methods： Eighty-four ICR mice were divided into six groups： control group, PM2.5 group, PM2.5 ＋ aspirin group, PM2.5 ＋ Vitamin C group, PM2.5 ＋ Vitamin E group, and PM2.5 ＋ ozone group. PM2.5 was given by intratracheal instillation every 2 days for 3 weeks. Aspirin, Vitamin C, and Vitamin E were given once a day by oral gavage for 3 weeks, and ozone was administered by intraperitoneal injection once a day for 3 weeks. The levels ofanti-Mullerian honnone （AMH）, interleukin-6 （IL-6）, tumor necrosis factor-alpha （TNF-α）, and 8-hydroxy-2＇-deoxyguanosine （8-OHdG） were measured using enzyme-linked immunosorbent assay. Western blotting analysis was used to analyze the expressions ofBcl-2, Bax, and caspase-3 in ovaries. Changes in histological structure were examined by light microscope and electron microscopy was used to detect ultramicrostructure. Results： The results demonstrated that PM2.5 decreased AMH levels （P 〈 0.001）; however, aspirin （P 〈 0.001）, Vitamin C （P 〈 0.001）, Vitamin E （P = 0.001）, and ozone （P = 0.002） alleviated the decrease. Changes of IL-6, TNF-α, 8-OHdG, Bax/Bcl-2, and caspase-3 in PM2.5 group were increased compared to control group （P 〈 0.001）, while in PM2.5 ＋ aspirin, PM2.5 ＋ Vitamin C, PM2.5 ＋ Vitamin E, and PM2.5 ＋ ozone groups, they were statistically decreased compared to PM2.5 group （P 〈 0.001 or P 〈 0.05）. Conclusions： PM2.5 cause the damage of ovaries, and aspirin, Vitamin C, Vitamin E, and ozone antagonizes the damage. The protective mechanism

关键词： Aspirin Fine Particulate Matter Ozone Reproductive Toxicity Vitamin C Vitamin E

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一种非真实感绘制的多智能体仿真方法

系统仿真学报 2006年第10期18卷 2836-2839页

作者：钱小燕肖亮吴慧中南京理工大学计算机系江苏南京210094

提出了一种非真实感绘制的多智能体方法。绘制过程分为三阶段:轮廓绘制、素描绘制和多层涂色,每阶段分别由一类智能体进行模拟绘制。绘制智能体定义为具有一定生命周期、类型标识、特征标志等属性以及一定行为特征的智能体,它们不断与... 详细信息

提出了一种非真实感绘制的多智能体方法。绘制过程分为三阶段:轮廓绘制、素描绘制和多层涂色,每阶段分别由一类智能体进行模拟绘制。绘制智能体定义为具有一定生命周期、类型标识、特征标志等属性以及一定行为特征的智能体,它们不断与绘制环境交互,由局部环境激励触发它们不同的绘制行为。通过自适应地调整行为,绘制智能体能够搜索到各自的特征像素并进行特征绘制,从而完成各自的绘制任务。实验表明,此方法能够较好地模拟画家创作过程。

关键词：非真实感绘制多智能体绘画技巧建模与仿真

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基于图像的非真实感艺术绘制技术综述

工程图学学报 2010年第1期31卷 6-12页

作者：钱小燕南京航空航天大学民航学院江苏南京210016

非真实感绘制是计算机图形学和图像处理中一个崭新的课题,属于计算机艺术的范畴,正受到国内外研究者越来越多的重视并取得了一系列的研究成果。首先简要介绍了非真实感绘制的研究意义及其研究范围;然后通过对其中涉及的主要关键算法进... 详细信息

非真实感绘制是计算机图形学和图像处理中一个崭新的课题,属于计算机艺术的范畴,正受到国内外研究者越来越多的重视并取得了一系列的研究成果。首先简要介绍了非真实感绘制的研究意义及其研究范围;然后通过对其中涉及的主要关键算法进行总结分析,并对国内外典型的绘制方法进行比较和分类,阐述了非真实感绘制的主要研究内容;最后对今后的发展方向做出了展望。

关键词：计算机应用非真实感绘制综述颜色传输纹理合成基于画笔的绘制

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引导滤波的红外图像预处理算法

科学技术与工程 2015年第21期35卷 32-37页

作者：钱小燕南京航空航天大学民航学院南京210000

针对红外图像固有噪声和灰度分布非均匀性影响图像质量的问题,提出一种基于引导滤波的红外图像预处理方法。根据引导图的局部信息,在红外图像的不同位置动态生成滤波核函数,从而可以在平滑场景的同时保持甚至增强边缘细节。实验表明,该... 详细信息

针对红外图像固有噪声和灰度分布非均匀性影响图像质量的问题,提出一种基于引导滤波的红外图像预处理方法。根据引导图的局部信息,在红外图像的不同位置动态生成滤波核函数,从而可以在平滑场景的同时保持甚至增强边缘细节。实验表明,该方法可以有效滤除噪声,保持场景强边缘,改善灰度分布非均匀性;且由于引导滤波算法复杂度与滤波半径无关,处理速度快。此外,应用实验表明该方法可以提高融合图像视觉效果,增强目标跟踪的定位精度,在图像增强中能够有效避免伪边缘的产生。

关键词：红外图像去噪引导滤波图像增强图像融合

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基于多分辨率的非真实感绘制

南京理工大学学报 2006年第3期30卷 348-351页

作者：钱小燕肖亮吴慧中南京理工大学计算机科学与技术学院江苏南京210094

提出了基于多分辨率方法和像素8-邻域概念绘制图像的方法。采用金字塔生成多幅不同分辨率的参考图像,按照分辨率由低到高的顺序逐层绘制;每层绘制由一组画笔完成,画笔由一系列骨架点控制,运用像素8-邻域的概念生成一系列骨架点。通过多... 详细信息

提出了基于多分辨率方法和像素8-邻域概念绘制图像的方法。采用金字塔生成多幅不同分辨率的参考图像,按照分辨率由低到高的顺序逐层绘制;每层绘制由一组画笔完成,画笔由一系列骨架点控制,运用像素8-邻域的概念生成一系列骨架点。通过多个参数的不同设置,能够方便灵活地把一幅照片渲染成一定风格的艺术图像。

关键词：非真实感绘制图像金字塔 8-邻域画笔模型