A four spiral slots microstrip patch antenna for radiotelemetry capsules based on FDTD

Antenna is very crucial to radiotelemetry capsules which can measure the physiological parameters of the gastroin- testinal (GI) tract. The objective of this paper is to design a novel spiral slots microstrip patch antenna for the radiotelemetry capsules communicating with external recorder at 915 MHz located in ISM (Industry, Science, and Medical) bands. The microstrip patch antenna is designed and evaluated using the finite-difference time-domain (FDTD) method. Return loss characteristics and the effect of the human body on resonant frequency are analyzed, and the performances of radiation patterns at different positions of the human alimentary tract are also estimated. Finally, specific absorption rate (SAR) computations are performed, and the peak 1-g and 10-g SAR values are calculated. According to the peak SAR values, the maximum delivered power for the designed antenna was found so that the SAR values of the antenna satisfy the ANSI (American National Standards Institute) limitations.     

Sex Education Legislation and HPV Vaccination Rates among Adolescents in the United States

Abstract

This study sought to determine if human papillomavirus (HPV) vaccination rates are associated with teaching requirements for abstinence in state sex education laws and policies. A cross-sectional analysis was conducted assessing the association between abstinence education legislation and HPV vaccination rates in adolescents (aged 13–17?years). After adjustment for insurance coverage and household income, the level of abstinence education was not significantly associated with vaccination rates. However, a higher percentage of individuals uninsured was significantly and negatively associated with the vaccination rate. This suggests that HPV vaccination rates are associated with insurance coverage, but not with the degree to which sex education laws or policies emphasize abstinence.     

十四、十五世纪山西商业文明兴起原因再探讨

为什么人文环境和地理条件都不占优势的山西,在一个特定的历史时期,成为中国商界、金融界巨擘的摇篮?除去边境军事形势所形成的巨大市场和开中制的实施提供的商机外,传统文化以及地缘文化的影响也具有十分重要的意义。     

自然手语与规约手语之研究

目前中国大多数聋校是以手语为主要教学语言。本文从手语的基本特点入手 ,把手语分为自然手语和规约手语并具体分析了两者的特点 ,进而就如何在课堂教学中运用好自然手语和规约手语 ,以提高课堂教学效率 ,促进聋生语言能力的发展以及以建立聋人手语语料厍。     

集群式计算机系统在生物信息学中的应用

1　Introduction　SMP (symmetricmulti processing)andMPP (mas sivelyparallelprocessing)arethetwotypesofstruc tureofparallelcomputing .　Symmetricmulti processingsystemshavemultipleCPUsattachedtothesamebusandsharingRAM .Massivelyparallelprocessingisthecooperated pro cessingofaprogrambymultipleprocessorsthatworkondifferentpartsoftheprogram ,witheachprocessorusingitsownoperatingsystemandmemory .ThechoicebetweenSMPandMPPdependsonthenatureoftheproblembeingsolved .Iftheproblemcanbeeasilypartit…     

Effects of light and temperature conditions on flowering in Mat Rush

The effects of photoperiod and light intensity on flowering in Mat Rush cv. Gangshan 3 were studied. The results showed that treatments with longer day length stimulated flowering significantly and increased stem flowering percentage (SFP). Plants treated with low light intensity at early stage had substantially reduced florets per cyme, SFP, tillers per plant and stem length. At middle and late stage, low light intensity significantly reduced SFP. The principal climatic factors affecting SFP were as follows: mean temperatures (MT) of the third ten-day period (TDP) in December and of the second TDP in February, actual sunlight hours (SH) of the third TDP in February and precipitation of the third TDP in March. A nonlinear simulation model for SFP was established with experimental results and corresponding climatic data (see Eq. (2)). Simulation by the above equation yielded values the same as those observed from 1992 to 2000, indicating its accuracy in describing the relationship between flowering and light and temperature conditions. The interaction between vernalization and SH is also discussed in this paper. Project (No. 981105) supported by the Ningbo City Science Foundation, China     

R~n上局部可积函数一个性质的推广

文［１］中王士林教授给出了一个有用的引理，本文将该引理进行推广，利用该引理为研究Ｌｉｔｌｅｗｏｏｄ—ｐａｌｅｙｇλ—函数和Ｌｕｓｉｎ面积积分函数提供了有力工具     

对Bermond猜想(32)的一个注记

文章对Bermand猜想（2）加强条件后给出了证明。     

Analysis on Chinese/English Code-Switching in Computer-Mediated Communication Based on Meme Theory

Nowadays,computer-mediated communication(CMC) becomes one of the most convenient ways for people to connect with each other in which Chinese/English code-switching has been frequently used and widely spread.The article will memeticly interpret this language phenomenon based on the authentic examples collected from various kinds of CMC,and point out that the Chinese/English code-switching in CMC is a kind of strong memeplex which includes many different strong memes,resulting in the popularity of Chinese/English code-switching in CMC.     

从香港译名与内地译名差异看香港翻译(英文)

一直以来香港对一些英语名称的翻译和内地存在较大差异,这在一定程度上阻碍了两地的政治、经济和文化交流。为了深入地了解这一现象,文章搜集了两地在多个领域中使用的不同译名,通过比较的方法分析了香港译名的翻译特点,发现香港译名具有本土化、人性化和商业化的特点。形成这种现象的原因是两地在翻译过程中采用了不同的目标语和翻译方法,另外,不同的生活方式和文化背景也是原因之一。