球碳

本文系统地论述球碳C_(60)的结构及其基本性质等,展望其在商业领域的应用。     

拉萨市4—6岁幼儿词汇水平发展现状及培养对策

为了解拉萨市4—6岁幼儿词汇水平的发展现状,采用测验法对拉萨市4所幼儿园475名幼儿进行调查。调查发现,拉萨市4—6岁幼儿词汇水平处于中等水平,幼儿词汇学习的主动性不强,词汇创造水平较低,词性区分较薄弱。根据存在的问题提出了相关培养建议。     

Productivity impact of technology spillover from multinationals to local firms: Comparing China's automobile and electronics industries

This study compares the impact of innovative activities of multinationals on local firms in China's automobile and electronics industries. In the automobile industry we find that both multinationals and local firms in the assembly industry have vertical spillovers to local parts supply firms. In contrast, in the electronics industry, only a small amount of vertical spillover effects from local firms can be found. Furthermore, we find that horizontal spillovers exist in neither the automobile industry nor the electronics industry.     

浅析大学英语教学与测试的关系

以两所大学英语的教学模式以及四、六级考试成绩的调查为依据,分析了它们在师资力量、生源状况基本相同的情况下不同的教学模式所产生的不同结果。     

Correlation of Levels of IL-6 with Tumor Burden and Receptor Status in Patients of Locally Advanced Carcinoma Breast

Inflammatory pathways have garnered considerable interest in the recent past as an important mediator of the molecular mechanisms leading to carcinogenesis. The present study was conducted to evaluate the correlation of levels of IL-6 with tumor burden and receptor status in patients of locally advanced carcinoma breast. This prospective study was conducted by the collaborative efforts of the departments of Surgery and Biochemistry, Maulana Azad Medical College and associated Lok Nayak Hospital and GB Pant Hospitals, New Delhi. The study population comprised of 30 cases of locally advanced breast carcinoma recruited from the surgical outpatient department. The various parameters that were evaluated include detailed clinico-pathological profile and IL-6 levels. Tissue specimens received after surgeries were examined for the various characteristics indicative of tumor prognosis. Majority of the patients was in the age group of 41–50 years and was postmenopausal. The serum level of IL-6 increased as the disease progressed from T3N1M0 to T4dN2M0 (41.4 ± 31.9 vs. 164.0 ± 31.1 pg/ml respectively). There was significant correlation of IL-6 levels with lymph node involvement, tumor grade, mitotic index and adipose tissue invasion. Emerging molecular markers are being investigated for breast cancer prognosis assessment and prediction of response to chemotherapy including selection of best possible treatment modality. Our study showed that there is progressive increase in IL-6 levels as the stage of disease progresses.     

利用6W分析法进行大学生职业生涯教育的创新性思维

随着大学应届毕业生的逐年增加,大学生就业形势日益严峻,做好职业生涯规划教育已迫在眉睫。文章阐述了当前我国大学生职业生涯规划教育存在的问题,并在此基础上提出6W分析法进行大学生职业生涯规划,以提升大学生的就业竞争力,促进高校的就业工作更好发展。     

微直流电机恒速控制实验系统

设计的直流电机恒速控制实验系统用STM32F103C8T6单片机作为主控制芯片,采用光电耦合使控制系统与电机系统互不干扰,用PWM(脉宽调制)控制电机转速,并用测速电机测量实时转速并反馈给控制器,通过PID计算得出保持转速不变的PWM占空比,实现闭环控制,系统还预留大量接口和可扩展单元以方便学生创新设计。实验证明,该系统硬件设计可靠,能保证在不同环境下电机稳定地实现恒速运转。     

IPv6技术及其发展

阐述了新一代Internet协议—IPv6的基本特点；讨论了IPv4过渡到IPv6的几种方案；介绍了IPv6技术的发展现状。     

6S管理在高校实验实训室日常管理中的应用

介绍了6S管理的起源及内涵;结合高校实验实训室的工作现状,在日常管理中引入6S管理的理念;提高计算机实验室的日常管理水平及工作效率,为高质量的教学活动奠定良好的基础,充分发挥计算机实验室在高职院校职业技能教育过程中不可替代的作用。     

嘧啶水杨酸类除草剂中间体2-氯-4,6-二甲氧基嘧啶的合成研究进展

综述了国内外近年来农药中间体2-氯-4,6-二甲氧基嘧啶的合成研究进展.介绍了以丙二睛、硝酸胍与丙二酸二乙酯为原料的合成工艺路线和研究水平.分析比较了各种合成方法的优缺点,展望了合成2-氯-4,6-二甲氧基嘧啶的工业化发展前景.