蔚州诗书传家的清官文化在清代的继承与发展

河北蔚县,古称蔚州。蔚州的文化非常丰厚,尤其在明末清初之际形成的以魏象枢、李云华为代表的清官文化,更是影响深远。以蔚县魏李家族为线索,可以探析清官文化在康雍乾三朝的发展脉络。其中所折射出的诗书传家的传统对清廉行政的影响,值得当代人关注与思索,对于我们今天培育"不想腐"的政治生态具有重要的历史参考价值。     

动物世界里的“化学战”

人类战争有化学战,动物界同样也有化学战.许多动物拥有诸如毒液、麻醉液、腐蚀液、粘结液之类的"化学武器",经常展开一幕又一幕生死存亡的斗争.     

“培养学生记忆力”在历史教学中的重要性

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。     

怎样加深对神经调节部分概念和结论的理解

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。     

口外翼下颌阻滞麻醉的应用解剖学研究

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。     

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

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…     

工程设计中人工神经网络技术模型

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.     

Clinical detection and movement recognition of neuro signals

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…     

吴兴沈氏与刘宋皇权政治

吴兴沈氏的出现是江南士族正式登上南朝政治舞台的标志，在刘宋强化皇权的斗争中，沈氏人物沈演之，沈庆之，沈攸之我不置身其中，而沈氏家族的政治地位也由最初的君主私人亲信的身份向“王朝之臣”转化，南朝四代，沈氏累世贵显的地位由此奠定，沈氏家族的崛起与南朝皇权政治的复归息息相关，同时也反映了南朝历史中南方因素的加强。     

Direct - Torque, Neuro - Fuzzy Control of Induction Motor

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.