热处理法消除真空泵泵盖白口组织研究

铸铁件中的白口组织会造成铸件加工困难,HT200真空泵泵盖壁厚较小,铸造中经常出现白口组织,造成因机加工困难而致废。本文研究了HT200真空泵泵盖的热处理工艺,通过热处理消除了真空泵泵盖得白口组织,使其加工性能得到改善,提高了其成品率。     

对联的语文教学功能初探

对联因其深刻的文化内涵和独特的艺术魅力而深受人们喜爱。对联的构成要素离不开语文的基本内涵,即汉语的音、形、义以及文学性等等。将对联的赏析引入语文教学,能拓宽学生的知识面,又能激发学生学语文的兴趣,收到事半功倍的效果。     

激光焊接与激光热处理

激光是一种应用广泛的新型热源。综述了激光在零件焊接、热处理两方面的主要应用。总结了激光焊接和激光热处理的优点。     

"MM(HT)"实验是高师数学教育改革的成功尝试

MM(HT)实验指高师数学教育专业贯彻数学方法论教育方式的教育改革实验.它注重发挥数学教育的素质教育功能,瞄准两个具体目标,遵循4条基本原则,适时恰当地操作10个变量,以培养高质量数学教师为目的.MM(HT)教育方式可以帮助老教师反思教学经历,撰写著作;可以帮助年轻教师迅速成长,改进教学方法,提高教学效率.     

Efficacy of topical honey therapy against silver sulphadiazine treatment in burns: A biochemical study

Thermal injury is associated with biochemical changes. The present study was undertaken to investigate relation of oxidative free radical generation and related biochemical parameters in burn trauma. The specific aim was to compare the levels of serum lipid peroxide, Ceruloplasmin and Uric Acid in burn patients during treatment with Silver Sulfadiazine Cream and honey therapy. It is a single blind prospective controlled study involving comparison of biochemical changes after treatment with silver sulfadiazine and honey treatment in burn injury. In burn trauma, there is excessive activity of free radicals at the site of injury. This is reflected in elevated blood levels of Lipid peroxide, Ceruloplasmin & Uric Acid. Honey therapy was was shown to decline the levels of serum Lipid peroxide, while there was mild increments in serum Ceruloplasmin levels whereas there was no significant effect on serum Uric Acid levels as compared to silver sulfadiazine treatment. Honey therapy seems to accelerate the process of healing. It has positive effect in reducing oxidative stressful state in burn trauma than the silver sulfadiazine treatment that results in rapid wound healing.     

Application of formant instantaneous characteristics to speech recognition and speaker identification

This paper proposes a new phase feature derived from the formant instantaneous characteristics for speech recognition (SR) and speaker identification (SI) systems. Using Hilbert transform (HT), the formant characteristics can be represented by instantaneous frequency (IF) and instantaneous bandwidth, namely formant instantaneous characteristics (FIC). In order to explore the importance of FIC both in SR and SI, this paper proposes different features from FIC used for SR and SI systems. When combing these new features with conventional parameters, higher identification rate can be achieved than that of using Mel-frequency cepstral coefficients (MFCC) parameters only. The experiment results show that the new features are effective characteristic parameters and can be treated as the compensation of conventional parameters for SR and SI.     

一种电能收集充电器模型的设计

设计了一种电能收集充电器模型,该充电器的核心为直流电源变换器,将从直流电源中吸收的电能转移到可充电电池充电中．系统根据输入电压不同采用HT7712和HT7750来构建充电控制电路,通过HT46E47单片机进行功率最大点的监测．直流电源输入电压为20V时候,实现以最大144．95mA的电流向可充电池充电;直流电源电压下降到0．13V时,系统依然实现对可充电池充电;同时系统具有实现自动启动充电等功能．