“培养学生记忆力”在历史教学中的重要性     

陈风波 《双语学习》2007,(5M):52-52

记忆力是提高历史教学水平的重要一环。要提高学生记忆能力，就要设法增强大脑对事物识记的痕迹的保存能力。因为记忆力的产生是由于客观事物对人的感官的作用，传人大脑，引起大脑皮层兴奋活动，形成一定的暂时神经联系，这种联系在大脑皮层上保存下来，便产生了记忆。  相似文献   

怎样加深对神经调节部分概念和结论的理解     

唐晓燕 《理科考试研究》2006,13(10):63-64

神经调节是高中生物教学中的重点和难点，也是近年高考出题的重点。笔者通过分析，发现许多学生在处理这部分试题时发生的错误主要是因对概念、结论的理解只停留在表层上，故对其相互关系梳理不清，无法建立起知识网络。要想提高这部分试题的得分率，应澄清以下几个问题。  相似文献   

口外翼下颌阻滞麻醉的应用解剖学研究     

蒋康  刘亚国 《大连大学学报》1992,(3)

在40侧头预部正中矢状切开标本和60侧下颌骨标本上,按口外翼下颌阻滞麻醉的设计要求,解剖观察了下牙槽神经、舌神经在翼下颌间隙的位置。测量了从下颌管下缘点和下颌角行口外翼下颌阻滞麻醉时的进针深度和角度。测得从下颌骨下缘点的进针深度为37mm;下颌角点的深度为30mm,穿刺针与下颌支后缘之间的角度为31°。对采用该法行口外阻滞麻醉的解剖学要点,优缺点进行了讨论。  相似文献   

Modeling water and carbon fluxes above summer maize field in North China Plain with back-propagation neural networks     

Qin Z  Su GL  Yu Q  Hu BM  Li J 《Journal of Zhejiang University. Science. B》2005,6(5):418-426

INTRODUCTION Dynamics of carbon and water vapor fluxesexchange between the atmosphere and the ecosystembiosphere, depend on complex and non-liner interplayamong physiological, ecological, biochemical andedaphic factors and meteorological conditions (Jarvis,1995; Leuning et al., 1995). There are many studiesquantifying the fluxes across different time and spacescales as well as assessing the environment con-straints on them by some kinds of biophysical orempirical models whose resul…  相似文献   

工程设计中人工神经网络技术模型     

尹卫东 《安阳师范学院学报》2005,(5):90-91

综合运用人工神经网络知识的获取方法及变权分析法,建立了工程设计方案优化选择的数学模型,使得工程设计理论依据更加充分,结论更切合实际.  相似文献   

Clinical detection and movement recognition of neuro signals     

Zhang XW  Yang YP  Xu XM  Hu TP  Gao ZH  Zhang J  Chen TY  Chen ZW 《Journal of Zhejiang University. Science. B》2005,6(4):272-279

INTRODUCTION Human limbs are complex, delicate systems.Their reconstruction, both for appearance and forfunction compensations, proves to be complicatedprojects. With the development of science and tech-nology, both researchers and disabilities hope to haveartificial limb much more perky, comfortable, dex-terous and effective. Although thousands of pros-thetic limbs are commercially available worldwide,most of them, from mechanical styles to electricstyles, from motion controlled t…  相似文献   

Direct - Torque, Neuro - Fuzzy Control of Induction Motor     

徐君鹏 《河南科技学院学报》2007,35(3):62-65

Fuzzy systems are currently being used in a wide field of industrial and scientific applications. Since the design and especially the optimization process of fuzzy systems can be very time consuming, it is convenient to have algorithms which construct and optimize them automatically. In order to improve the system stability and raise the response speed, a new control scheme, direct - torque neuro - fuzzy control for induction motor drive, was put forward. The design and tuning procedure have been described. Also, the improved stator flux estimation algorithm, which guarantees eccentric estimated flux has been proposed.  相似文献   

向上变盘就在八月     

金牛九段 《阅读与作文(高中版)》2011,(32):26

2011年8月2日无疑牵动了世界所有投资者的神经——因为这天有可能会出现美国国债违约。如果出现这个情况,地球人都知道这将是一个灾难。可是当这天美国总统奥巴马签署了提高美国债务上限和削减赤字法案。  相似文献   

东富龙:致力产品结构升级领跑冻干系统行业     

林染 《阅读与作文(高中版)》2011,(4):45

即将登陆创业板的上海东富龙科技股份有限公司(下称"东富龙")主营冻干机及冻干系统设备的研发制造,具有较强的盈利能力,公司最近三年的加权平均净资产收益率在43%以上。  相似文献   

桐昆股份:涤纶长丝先锋企业     

姚嘉 《阅读与作文(高中版)》2011,(18):64

中国PTA产业延续着2010年的红火发展势头,继PTA三巨头恒逸石化、荣盛石化、翔鹭石化或借壳或IPO登陆资本市场后,又一家化纤行业的龙头企业叩开了资本  相似文献