不同表面状态下的扫描电子显微镜能谱分析方法

针对样品表面吸附和污染导致扫描电子显微镜能谱仪成像质量和检测精度下降的问题,提出了一种扫描电镜能谱分析方法——吸附表面二次电子发射数值计算模型。首先,采用Polanyi位势理论在Cu表面构造了N_(2)多层吸附模型;其次,考虑吸附对功函数及电子散射过程的影响,采用Monte Carlo方法追踪电子在材料和吸附层内的散射轨迹,建立了电子与N_(2)分子散射模型;最后,将N_(2)多层吸附模型与电子与N_(2)分子散射模型合并,建立了吸附表面二次电子发射的精确模拟模型,用于计算N_(2)吸附分子对能谱的影响规律。数值计算结果表明,当N_(2)分子吸附量增大至3×10^(16)cm^(-2)时,二次电子能谱的最可几能量和半峰宽分别增大了3.16、4.76倍,二次电子比例减少至原来的215。采用所提模型对探测器进行优化设计,能够提高二次电子信号收集效率、降低噪声信号、提高分辨率。相比以往模型,所提模型突破了仅适用于分子吸附量小于3×10^(15)cm^(-2)的限制,并更真实地描述吸附对电子散射的影响,为研究扫描电镜环境下复杂表面状态的能谱提供了可靠的分析方法。

互联网金融视角下征信体系 建设的作用探析——以新能源汽车产业链为例

随着网络信息科学技术突飞猛进地发展,伴随而来的是社会进入到互联网时代,互联网时代一大特点是对数据信息的需求呈井喷式上涨趋势,互联网金融的应运而生。当互联网金融的发展波及各行业,人们意识到拥有一个各方经济主体信用信息平台的重要性。本文结合我国国情,以征信体系建设对我国新能源汽车产业的作用为研究方向,探讨其产生的作用,以促进我国征信体系的进一步发展与完善。

数字经济背景下安徽省中小企业转型升级路径探索

2022年两会期间“增强制造业核心竞争力”首次被写入政府工作报告,与2021年“保持制造业比重基本稳定”的定位对比方向更加明晰。支持中小企业发展是从“中国制造”走向“中国智造”的关键路径,更是打造中国经济活力,培养核心竞争力的关键。近年来国内制造行业市场竞争不断加剧,安徽作为制造业大省,其中占据中坚力量的中小制造业企业应当如何在不断变化的内外环境中,在行业追求高质量发展的条件下,实现企业内部智能升级和新能源的可持续发展,是制造业企业未来面临的机遇与挑战。本文从应用性角度分析安徽省制造业中小企业发展现状及未来机遇,在复杂的内外部宏观环境下以给相关研究者提供借鉴参考。

Efficacy evaluation of acupuncture plus rehabilitation training for post-stroke deglutition disorders of qi-deficiency blood stasis pattern

Objective:To observe the clinical efficacy of acupuncture plus rehabilitation training in treating post-stroke deglutition disorders of qi-deficiency blood stasis pattern.Methods:Sixty-six patients with post-stroke deglutition disorders of qi-deficiency blood stasis patter were divided into an observation group and a rehabilitation group using the random number table method.The two groups both received conventional medications and supportive treatment for stroke.In addition,the observation group received acupuncture plus rehabilitation training while the rehabilitation group only received the same rehabilitation training.The interventions were conducted 3 times a week for a total of 4 weeks in both groups.They were evaluated using Kubota water swallowing test(KWST),Fujishima Ichiro food intake level scale(FILS)and symptoms score of traditional Chinese medicine(TCM)before and after treatment,and at the 1-month follow-up.The therapeutic efficacy was assessed at the 1-month follow-up.Results:The KWST grading and FILS result after treatment and at the follow-up were significantly different from those before treatment in both groups(all P<0.001);the results of these two items at the follow-up were not significantly different from those after treatment in the two groups(all P>0.05).There were significant differences in the KWST grading and FILS result between the two groups after treatment and at the follow-up(all P<0.05).The TCM symptoms score changed significantly after treatment and at the follow-up compared with that before treatment in both groups(all P<0.001).The TCM symptoms grading efficacy at the follow-up was significantly different from that after treatment in the observation group(P<0.05),while the difference was statistically insignificant in the rehabilitation group(P>0.05).The TCM symptoms grading efficacy in the observation group was significantly different from that in the rehabilitation group after treatment and at the follow-up(both P<0.05).Conclusion:Based on the conventional treatment for stroke,acupuncture plus rehabilitation training or use of rehabilitation training alone both can improve the clinical symptoms in post-stroke deglutition disorders of qi-deficiency blood stasis pattern,but acupuncture plus rehabilitation training can produce more significant efficacy and better long-term efficacy in improving TCM symptoms.