核磁共振成像技术教学实验研究

为了克服现有核磁共振成像实验仪不能很好地满足直观实验教学需要之不足,同时为小样品小范围测试进行科学研究提供方便,并为教学单位提供价格相对低廉的产品.利用核磁共振成像的基本原理,采用NMI20型台式核磁共振成像仪,研究如何开展核磁共振成像技术教学实验问题.开发了涉及共振频率、脉冲序列、相位编码、加权成像、射频功放等内容的26个实验.作为教学实验设备,该成像仪备具有直观的界面以及成像过程的开放性,能使学生深入掌握核磁共振的原理、结构及其硬件系统,教学效果良好.     

数字成像法在肤色测量中的应用

皮肤颜色的客观化测量是皮肤医学领域最受关注的问题之一．近年来,随着科技的飞速发展,数字成像法实现了在肤色测量中的应用,该方法主要采用数字成像技术和图像处理技术来测量待测样品的颜色．文中首先简要叙述了皮肤颜色的形成过程,然后着重介绍了数字成像法在肤色测量中的几个应用实例,最后展望了该方法的发展方向和应用前景．事实表明,数字成像法已成为当今肤色测量领域中的一个重要研究方向．     

Imaging Analysis by Means of Fractional Fourier Transform

Starting from the diffraction imaging process,we have discussed the relationship between optical imaging system and tional Fourier transform,and proposed a specific system which can form an inverse amplified image of input function.     

高校体育与全民健身

高校体育作为《全民健身计划纲要》中的一个重要组成部分,应该为全民健身计划纲要的顺利实行做出应有的独特贡献,高校体育教学改革应该适应新形势的需要,要在学生中培养终身体育的思想,使大学生们不仅成为全民健身活动的参与者,而且应该是宣传推动全民健身活动的骨干。     

Electrical process tomography: seeing "without eyes" inside stirred vessels

Body-scanning exploiting 3-D imaging has revolutionised diagnostics and treatment in medicine. Process engineers would like to be similarly able to image chemical process units in 3-D, but without the ￡multi-million price tag. UMIST and Leeds University have together, through the Virtual Centre for Industrial Process Tomography (http://www. vcipt.org), pioneered several electrical process tomography techniques and used them in a variety of applications. Illustrations are presented to show how electrical resistance tomography (ERT) has been developed for typical stirred vessels widely encountered in batch process manufacturing. The technique is potentially fast and inexpensive and capable of imaging both dynamic and pseudo-stationary processes. Examples from UMIST's two-tonne vessel will be presented for miscible tracer mixing, as well as gas-liquid and solid-liquid mixing.     

Use of fluorometry for determination of skim milk powder adulteration in fresh milk

INTRODUCTION Adulteration of fresh milk by adding reconsti- tuted milk or the selling of reconstituted milk as the fresh product can be economically advantageous when either a surplus of milk powder exists or in countries where the importation of dried milk powder is subsidized. Adulteration malpractice creates unfair competition, could lead to market distortions, which in turn may impact the local or even the international economy. When legislation prohibits such practice, the detection o…     

Developing Student Metacognition through Reflective Writing in an Upper Level Undergraduate Anatomy Course

Incorporating metacognitive strategies in the classroom helps students monitor and adjust their learning strategies throughout the semester, and helps students progress from novice to expert learners in a subject. Journaling (i.e., reflective writing) is one metacognitive task that allows students to contemplate and articulate their skill development as they learn a new subject. The research reported here examines the use of ‘blogs’ (i.e., online journals) in an upper level undergraduate human anatomy course. The blogs both facilitated development of students' metacognitive skills and provided researchers insight into student metacognitive process. Data were examined from 92 students from three successive semesters (spring 2010, 2012 and 2014). Each student reviewed 10 radiology online cases throughout the semester and then reflected on their understanding of anatomy and radiology in an online blog for each case. A total of 927 blogs were examined for this research. The researchers used a grounded theory approach to analyze the blog narratives and develop a codebook based on common themes. The 927 blogs yielded 11,082 statements that were coded with the codebook. As the semester progressed, the blog entries showed that students demonstrated greater self-confidence in their abilities to understand the subject matter, expressed greater enthusiasm for anatomy in general, and they improved their metacognitive skills. This research illustrates that reflective writing in an undergraduate anatomy course not only facilitates improvement in student metacognitive skills, but also provides the instructor with evidence how a student progresses from novice to more experienced learner in anatomy.     

对高校体育教学改革的冷思考

运用文献资料,调查问卷,专家访谈和实地观察等研究方法,通过对目前高校体育教育现象的研究,认为高校体育仍受传统体育思想、内容和教学方法的影响与束缚,存在与现代人才培养模式不符的地方,为了适应二十一世纪市场的高速发展,培养与造就具有终身体育能力和习惯的复合型高级人才,高校体育教学应在内容和形式上有所改革。     

试论高等教育在终身教育体系下的作用及其调整

终身教育作为一种具有国际性和时代性的教育思潮,具有丰富的内涵。本文论述了高等教育在终 身教育体系中的重要作用,进而提出了一系列用终身教育理念改革高等教育的建议,以期更好地推动终身教育。     

流动注射荧光熄灭分析法测定碘离子

研究发现，在pH=6．0～11的磷酸盐缓冲溶液中，碘离子对荧光素汞的荧光具有熄灭作用，据此．结合流动注射技术，建立了碘离子的流动注射荧光分析方法，碘离子在0．10～4．0μg/L质量浓度范围内具有良好的线性关系，检测下限为75μg/L，该方法用于海带中碘含量的测定，具有操作简单快捷、灵敏度高、选择性好的特点。