物理等效代替方法初探

本文将中学物理教学中经常用到的等效代替法,结合教学实例,归纳为模型等效代替、过程等效代替、作用等效代替三种类型,并通过实例分析了解题思路、方法和技巧,帮助学生提高解题能力。     

基于Matlab的大规模电路回路分析法

用Matlab分析大规模电路的模型建立方法进行了研究,编写了相应的程序用于求解大规模电路中的电流和电压。结合一个实例,说明用Matlab分析大规模电路的方法。     

土层等效剪切波速与抗震设防的关系

本文通过简述土层等效剪切波速与抗震设防的关系,说明进行剪切波速测试的重要性。并运用实例对土层等效剪切波速的计算起始深度进行了探讨。     

翻译中的语用等效问题研究

语用等效翻译的实质可以从语境和言语行为理论两个方面来论述。语境是言语交际所依赖的环境,话语的真正含义只有在语境中才能得以实现。言语行为分为言之发、示言外之力和收言后之果,其中示言外之力是言语行为的核心,传达言外之意是语用翻译的重要内容。具体运用英汉互译实例分析说明语用等效是指译文与原文的交际价值的对等,而非表达形式及方式的统一。     

电视接收机的延迟式AGC

本文讨论了电视接收机的延迟式AGC电路特性，提出了与一些教科书不同的观点及电路特性曲线，并以实验加以证明。     

用辨证的观点看“等效翻译”

虽然许多翻译者对等效理论颇有争议,认为其理论结构还有一些难以自圆其说之处,但我们不能因此而否定这一理论。"等效翻译"对翻译理论研究和翻译实践均有一定的指导意义。因而,应当用辨证的观点去看待"等效翻译",在翻译时尽量与"等效"靠拢。     

电容式液体界面探测仪的研制

本介绍了一台电容式液体界面探测仪的研制及其性能。探头采用桥式电容电路，提高了仪器的灵敏度和准确度。实验结果说明该仪器可应用于厂矿企业废液处理中水和油或其它液体界面的探测。精度可达5cm，探测到界面对能进行自动报警或数字显示。     

非线性电阻网络的等效分析

由于求解非线性电阻网络的方法比较繁琐,对初学非线性电阻网络者而言,常常感到比较困难,本文给出,利用等效的方法求解非线性电阻网络的思路和途径,以及注意事项,意在为同仁提供参考。     

用数字集成电路设计时间鉴别电路

论述了用数学集成电路设计时间鉴别电路,分析了设计抢答器电路的基本方法,给出了两种电路简单、原理清楚并且实用的抢答器电路.     

等效翻译中直译与意译的结合

等效翻译要求译文给读者带来的效果等同于原文给读者带来的效果。这就要求译者在忠实原文的基础上 ,注意直译与意译的结合。本文从探讨直译与意译的效果入手 ,讨论了等效翻译中直译与意译的巧妙结合。     

激光反射式光电水位测量仪

本文介绍一种以激光作为测量光源,利用光敏电阻随光线强弱变化而阻值随之变化的特性,控制或门电路工作,并在数字电压表上显示水面高度的测量仪。     

脉宽调制（PWM）型300W开关稳压电源的研制

本文介绍笔者研制的脉宽调制（PWM）300W开关稳压电压的电路，原理及部分电路的设计、调度方法，该机具有输出电流大、成本低、实用性强的特点。     

《黑城出土文书》所见蒙古字学考

《黑城出土文书》中的＂蒙古教授＂证明了亦集乃路的蒙古字学的存在,并受亦集乃路总管府的管辖。依据相关文献探讨了其生员和经费来源。并推断F111：W55文书的时间上限为大德七年（1303年）。     

Psychological distress of marital and cohabitation breakups

Using data from a large survey, the British Household Panel Survey (BHPS), this paper explores the extent to which marital and cohabiting unions differ with respect to the short-term effects of union dissolution on mental health. We compare married individuals who divorced or separated with cohabitors whose first union ended and test the hypothesis that married individuals experience larger negative effects. Results show that initial differences are not statistically significant once the presence of children is controlled for, suggesting that the presence of children is a particularly significant source of increased psychological distress in union dissolutions. However, parenthood does not explain serious psychological distress, which appears to be associated with enduring traits (the personality trait neuroticism).     

准谐振式DC─AC变换器

准谐振技术是近年来提出的减小开关损耗，提高变换器效率的一种新技术。本文从两种基本的ＤＣ─ＡＣ变换方式开始，介绍了采用准谐振技术的各种ＤＣ─ＡＣ变换器的电路，工作原理及实验（仿真）结果。     

开关电源管耗计算及DC—DC电路分析

本介绍了电源技术领域中的后起之秀－开关电源的特点，基本工作原理及电路中功率晶体管，二极管损耗的计算方法并将开关电源与传统电源进行了比较，章还介绍了开关电源中常见的四种类型的DC－DC变换器并对其中两种进行详细分析，得出电路中各点电流电压波形，计算出电压变换比。     

Growth curve analyses of the relationship between early maternal age and children’s mathematics and reading performance

Regarding the methods used to examine the early maternal age-child academic outcomes relationship, the extant literature has tended to examine change using statistical analyses that fail to appreciate that individuals vary in their rates of growth. Of the one study I have been able to find that employs a true growth model to estimate this relationship, the authors only controlled for characteristics of the maternal household after family formation; confounding background factors of mothers that might select them into early childbearing, a possible source of bias, were ignored. The authors’ findings nonetheless suggested an inverse relationship between early maternal age, i.e., a first birth between the ages of 13 and 17, and Canadian adolescents’ mean math performance at age 10. Early maternal age was not related to the linear slope of age. To elucidate whether the early maternal age-child academic outcomes association, treated in a growth context, is consistent with this finding, the present study built on it using US data and explored children’s mathematics and reading trajectories from age 5 on. Its unique contribution is that it further explicitly controlled for maternal background factors and employed a three-level growth model with repeated measures of children nested within their mothers. Though the strength of the relationship varied between mean initial academic performance and mean academic growth, results confirmed that early maternal age was negatively related to children’s mathematics and reading achievement, net of post-teen first birth child-specific and maternal household factors. Once maternal background factors were included, there was no statistically significant relationship between early maternal age and either children’s mean initial mathematics and reading scores or their mean mathematics and reading growth.     

区域碳源碳汇差量估算的云模型研究

引入云模型和云理论,通过对相关区域碳源碳汇数据的收集与测算,尝试提出一种评估区域碳源汇差量问题的新理论与新方法。其重点是区域碳循环的结构分析与评估框架和方法,以为区域碳减排与碳增汇措施提供科学的理论依据及定性、定量相结合的技术支持。     

包头师范学院网上学费查询系统设计方法

本文给出了包头师范学院校园网学费查询系统设计方法和ASP源程序核心代码.同时给出了两种异构数据库SQL Server 2000和Access 2003的转换方法.     

共词分析法探讨国内图书馆阅读研究热点

为发掘国内图书馆阅读学在2003～2012年近10年间的研究热点以及研究新动向,以CNKI全文数据总库为检索源,以“图书馆阅读”主题相关文献的关键词作为研究对象,利用共词分析为主要研究方法,利用ROST内容挖掘软件、SPSS17.0统计工具对已有关键词进行分析.最后根据数据处理以及分析结果,对2003～ 2012年图书馆阅读的研究热点内容进行了系统分析,并对研究趋势做了进一步的探讨.