两种简便测定尿肌酐排出量的方法

采用实验评定法,对同一天的尿液分别测定两个时段的尿肌酐量、晨尿肌酐量及全日尿肌酐量,并对两种简便测定尿肌酐的方法进行分析比较。结果表明,两段尿测定法与一段尿法均能比较客观代表全日尿肌酐量。     

初中数学模型方法教学的尝试

在平时教学中,对重大的数学概念、原理的产生与发展过程,笔者均以概念、原理的意象为背景,抓住问题的本质,引导学生作探索,在理解上下功夫;在解决问题的过程中引导学生从方法论上作概括,同时十分重视师生情感交流,转变学生对数学的态度,激发情趣,调动学习的积极性.在初中起始阶段曾反复进行方     

Jewelry Design Competition Highlights Fashion and Creativity

The 4th China Jewelry Design Competition was concluded In Beijing last November. The competition, with the theme of ＂Colorful Time： Orlginality China＂, was jointly organized by China Gem and Jade Stone Association, the Jewelry and Jade Stone Ornaments Administration Center of the Ministry of Land and Resources and CHJ Jewelry Co, Lid CPPCC Vice Chairman Li Guixian, Land and Resources Minister Sun Wensheng as well as celebrities and designers from jewelry, fashion and entertainment circles attended the prize-granting ceremony.     

多媒体电子教室整体方案与采购招标策略

多媒体电子教室建设是一项综合性强的系统工程，在降低成本采购的同时，要注意保证系统性能的可靠。我院多媒体电子教室建设成功的整体方案、选型配置、招标采购管理经验，提供给有关学校以借鉴。     

保函换取清洁提单问题研究

用保函换取清洁提单 ,在当今的航运实务中被普遍采用。在托运人和承运人之间就签发清洁提单的问题发生了争议时 ,保函可以起到润滑剂的作用 ,避免因此而产生的船期损失 ,从而维护了国际贸易的迅捷性。但是 ,对于这一问题 ,不仅外国法院有不同的主张和判例 ;我国法学界和航运界也各执一说 ,莫衷一是 ,至今 ,国际间没有统一的认识。因此 ,对换取清洁提单的保函 (下称“保函”) ① 进行系统的研究 ,无论在司法实践中 ,还是在航运和对外贸易实务上都有现实意义     

对高校实施“学科馆员“制度的新思路

文章对学科馆员制度的概念、学科馆员制度的现状及缺陷进行了简单分析,并从我国国情、馆情出发,对高校图书馆实施"学科馆员"制度提出了自己新的思路.     

发挥高校电化教育机构在素质教育中的作用

在教育过程中作为各种素质基础的文化素质教育 ,虽然中小学校普遍都在进行这项工作 ,但在大学中搞文化素质教育 ,应该是非常重要的一个阶段。也就是说 ,对大学生进行文化素质教育 ,应是高等教育的一项重要任务。高等学校深入开展的素质教育 ,是全面发展教育的重要组成部分 ,这对培养有社会主义觉悟的、有文化的劳动者具有特别重要的意义。电化教育是现代科学技术在教育、教学上的应用 ,它对素质教育同样可以也应该发挥重要作用。     

Novel high torque bearingless two-sided rotary ultrasonic motor

Applications are limited at present because the currently available ultrasonic motors (USMs) do not provide suffi-ciently high torque and power. The conventional travelling-wave USM needs the bearing to support, which required lubricant. To solve the above problem, a bearingless travelling-wave USM is designed. First, a novel structure of the two-sided USM consisting of a two-sided teeth stator and two disk-type rotors is designed. And the excitation principle of the two-sided travelling-wave USM is analyzed. Then, using ANSYS software, we set up the model of the stator to predict the excitation frequency and modal response of the stator. The shape of the vibration mode was obtained. Last, the load characteristics of the USM are measured using ex-perimental method. The maximum stall torque and the no-load speed were obtained. The results showed that the characteristics of the two-sided USM are better than those of the conventional one-sided USM.     

Cell therapy in congestive heart failure

Congestive heart failure （CHF） has emerged as a major worldwide epidemic and its main causes seem to be the aging of the population and the survival of patients with post-myocardial infarction. Cardiomyocyte dropout （necrosis and apoptosis） plays a critical role in the progress of CHF; thus treatment of CHF by exogenous cell implantation will be a promising medical approach. In the acute phase of cardiac damage cardiac stem cells （CSCs） within the heart divide symmetrically and/or asymmetrically in response to the change of heart homeostasis, and at the same time homing of bone marrow stem cells （BMCs） to injured area is thought to occur, which not only reconstitutes CSC population to normal levels but also repairs the heart by differentiation into cardiac tissue. So far, basic studies by using potential sources such as BMCs and CSCs to treat animat CHF have shown improved ventricular remodelling and heart function. Recently, however, a few of randomized, double-blind, placebo-controlled clinical trials demonstrated mixed results in heart failure with BMC therapy during acute myocardial infarction.     

课间跳绳真好

课间10分钟能做什么？侃侃大山或愣一愣也未尝不可。可总不能老是这么坐着呀!自己刚刚三十出头，体重却一下子飙升到80多公斤，连弯腰都要费劲。妻让我去运动运动，我却说没时间。我怎么没想到利用这10分钟活动一下呢？