基于PC机的位移传感器的线性补偿

在单自由度磁悬浮系统中,为了得到转子的稳定悬浮,必须由系统中的位移传感器提供转子的准确位置信息．这就要求对传感器测得的电压信号进行处理,这些信号在很大范围内是非线性的,从而限制了其测量范围．为了使转子在大范围内稳定悬浮,需要对传感器的信号作线性处理．本文根据所测得的电涡流位移传感器的特性曲线,用软件补偿的方法对此传感器进行了线性补偿,从而扩大了传感器的线性范围．实践表明,用此方法对传感器线性补偿后,转子的稳定悬浮范围扩大很多．     

Engineering biocompatible TeSex nano-alloys as a versatile theranostic nanoplatform

Photothermal nanotheranostics, especially in the near infrared II (NIR-II) region, exhibits a great potential in precision and personalized medicine, owing to high tissue penetration of NIR-II light. NIR-II-photothermal nanoplatforms with high biocompatibility as well as high photothermal effect are urgently needed but rarely reported so far. Te nanomaterials possess high absorbance to NIR-II light but also exhibit high cytotoxicity, impeding their biomedical applications. In this work, the controllable incorporation of biocompatible Se into the lattice of Te nanostructures is proposed to intrinsically tune their inherent cytotoxicity and enhance their biocompatibility, developing TeSe_x nano-alloys as a new kind of theranostic nanoplatform. We have uncovered that the cytotoxicity of Te nanomaterials primarily derives from irreversible oxidation stress and intracellular imbalance of organization and energy, and can be eliminated by incorporating a moderate proportion of Se (x = 0.43). We have also discovered that the as-prepared TeSe_x nano-alloys have extraordinarily high NIR-II-photothermal conversion efficiency (77.2%), ⁶⁴Cu coordination and computed tomography contrast capabilities, enabling high-efficacy multimodal photothermal/photoacoustic/positron emission tomography/computed tomography imaging-guided NIR-II-photothermal therapy of cancer. The proposed nano-alloying strategy provides a new route to improve the biocompatibility of biomedical nanoplatforms and endow them with versatile theranostic functions.     

Regarding the Dead: A Model for Anatomical Gifting Outside the Traditional Medical School Setting

In 2017, Elon University became one of very few universities in the United States without a medical school to have an in-house Anatomical Gift Program (AGP). The program accepts first-person-consenting individuals only and within 2.5 years has become self-sufficient, supporting anatomy curricular needs of its physical therapy, physician assistant, and undergraduate biology and anthropology programs (n = 21 donors annually). This paper describes the timeline, costs, and benefits of developing an in-house AGP at a university without a medical school. Policy development, public outreach, equipment needs, and cost benefits are discussed. Within 2.5 years of program opening, the AGP Director delivered 161 educational outreach presentations at 86 different venues across the state providing information on anatomical gifting. The program registered 320 individuals (60% female, 40% male) and enrolled 41 deceased donors (69% female, 31% male; average age of 74.6 at time of registration and 74.8 at donation). During the first seven months of the program, donor preparation costs (with outsourcing for transport/donor preparation/document filing/serology testing/cremation) averaged US$ 2,100 per donor. Over the past 23 months, donor preparation has been completed on site, lowering the cost per donor to US$ 1,260. Other costs include personnel salaries, legal fees, and outfitting of the anatomy laboratory and preparatory room. Program benefits include support of anatomy education on campus, assurance that all donors have given first-person consent, and faculty/student access to donor-determined health, social, and occupational information. Faculty, staff, and students contribute to the daily operations of the AGP.     

直流磁场对铁磁性材料摩擦副减磨作用的分析

对比有无磁场条件下铁磁性材料摩擦副的摩擦学性能,发现直流磁场的存在显著改善了铁磁性材料摩擦副的摩擦学性能。其主要原因是磁场的存在使磨屑保持摩擦副之间,从而铁磁性材料摩擦副的两体摩擦转变为摩擦副、磨屑之间的三体摩擦;同时,磁场的存在提高了氧化磨损在磨损中的比例。     

外加磁场对含Fe_(73)Cu_1Nb_(1.5)V_2Si_(13.5)B_9纳米晶带的电感线圈与电容串联电路谐振频率的影响

含有纳米晶带的电感线圈与电容组成LC串联电路有固有谐振频率。通过实验研究了含有Fe基纳米晶带的电感线圈与电容串联电路谐振频率随外磁场变化的关系,讨论了磁致频移现象的原因。通过实验还研究了含有Fe基纳米晶带的电感线圈与电容串联电路在谐振频率的交变电流驱动下的巨磁阻抗效应。     

Sensors Array Technique for Monitoring Aluminum Alloy Spot Welding

In this paper,the sensors array technique is applied to the quality detection of aluminum alloy spot welding.The sensors array has three forms,i.e.,linear magnetic sensors array,annular magnetic sensors array and cross magnetic sensors array.An algorithm based on principal component analysis is proposed to extract the signal eigenvalues.The three types of magnetic sensors array are used in the experiment of monitoring the signal.After the eigenvalues are extracted,they are used to build a relationship with ...     

利用MestRe-C软件处理二维核磁共振谱图

针对Bruker公司产的核磁共振谱仪上采集的数据,报道了利用MestRe-C软件处理二维核磁共振(2D NMR)谱图的方法,包括数据的导入和变换、相位较正、基线校正、化学位移定标、在二维谱图上调用一维谱图、数据输出等一系列主要步骤。     

国内家庭治疗研究的回顾与反思

家庭问题的凸现促使了家庭治疗在国内的发展。相关学者从理论和实践两个层面对经典家庭治疗模式和后现代家庭治疗模式进行介绍和运用。文章回顾与反思了国内这方面的相关研究,以便理清思路,为以后研究提供借鉴。     

音乐治疗浅释

人类将音乐用于治疗的历史源远流长。音乐治疗自1940年成为正式学科发展至今已经十分成熟。文章试图对音乐治疗的概念、历史、功能与分类进行分析,以期阐明音乐治疗的基本问题。