河南省高校大学生体育弱势群体体育行为的研究

采用文献资料法、访问调查法、问卷调查法、数理统计法和逻辑分析法等研究方法,对河南省高校大学生体育弱势群体的体育行为及其影响因素进行调查研究。结果显示:河南省高校大学生体育弱势群体的体育行为水平较低,没有形成良好的锻炼习惯。场地器材、心理因素、体育价值观和体育教学等是影响大学生体育弱势群体参加体育锻炼行为主要因素。     

广义并接图的无符号拉普拉斯谱半径

为研究图的无符号拉普拉斯谱半径的界,以图的顶点度di等为参数,通过对图的无符号拉普拉斯矩阵进行相似变换,证明由任意两个图G1和G2得到的广义并接图G的谱半径上确界q(G).由此刻画达到这个上界的极图当且仅当G1和G2均为正则图.     

An electrostatic microwell–based biochip for phytoplanktonic cell trapping

A simple microwell-based microfluidic chip for microalgal cells trapping was fabricated. An electrostatic cell trapping mechanism, enabled by a positively charged glass surface, was used. The chip was capable of capturing multiple algal cell types. In the case of filamentous Spirulina platensis, we observed single filament occupancy of up to ∼30% available wells, as high as some previously proposed methods. Captured filaments were not of any preferential size, suggesting well randomized cell trapping. It was found that the electrostatic attraction did not affect the cell growth. Total replacement of liquid inside the wells could be achieved by pumping new solutions via the inlet, making single cell experiments in controlled chemical conditions possible. After the top layer of the chip was removed, cells in the wells could be simply transferred using a micropipette, turning the chip into a platform for strain selection.     

多媒体课件在线性代数教学中的应用

多媒体课件用于线性代数课程教学,有很多优势,但也存在着一些误区。探讨多媒体课件在线性代数课程教学中的应用方式、原则,对多媒体课件应用于线性代数教学中可能出现的问题及解决策略进行了分析。     

A Single Centre Prospective Study of Liver Function Tests in Post Liver Transplant Patients

Liver transplantation means surgical replacement of a diseased liver with a healthy liver. The survival rate used to be 30 % after 1 year and LTx was considered to be the last procedure when all medical or surgical intervention failed. Advances in donor organ preservation, surgical techniques, patient selection, immunosuppressive regimens and treatments for opportunistic infections all have contributed to substantially improve the survival rates. Despite substantial technological, medical and surgical advances, liver transplantation remains a complex procedure that is accompanied by significant morbidity and mortality. The post-operative outcome of each patient varies greatly depending on the patient’s pre- operative state, quality of the donated organ and the complexity of the surgery. Complications occur both immediately post transplant and in the long term. Most of the problems can be satisfactorily assessed with a panel of routine LFTs results of which are generated quickly, cheaply on the analyzer which operates 24 h. Liver Function Test identifies the presence of problem but not problem itself. Abnormal results can be meaningful only when used with clinical data, radiological findings. The study includes 75 post LTx patients in three groups adults (non ACR), Pediatrics and ACR. All recipients were on immunosuppressive therapy (tacrolimus, mycophenolate and methylprednisolone), antiviral (ganciclovir), antiprotozoal, antibacterial and antifungal (fluconazole). 5 mL of blood was drawn in plain vacutainer from the post LTx patients every day for 15 days and LFT and GGT was done. Routinely performed liver function tests correlates well with clinical complications involving liver in the transplant patients. Instead of daily testing, may be alternate day analysis of LFT should be sufficient for effective monitoring of patients. The total protein and albumin and the transaminases offer little help in monitoring LFT post LTx. The elevated levels of serum GGT and ALP may be related to chronic immune damage to the transplanted liver. Serum GGT and ALP can be used as early markers for diagnosing biliary complications and can be used to asses adequacy of endoscopic treatment in the group of patients presenting early. Thus, most of the problems can be satisfactorily assed with a panel of routine LFTs generated quickly, cheaply on analyzer which operates 24 h each day. However, it must be emphasized that LFTs may identify the presence of problems but not the problem itself and the abnormal results are meaningful only when correlated with other clinical information.     

高校计算机基础课程教学改革探讨

通过分析高校计算机基础课程的教学现状,提出对高校计算机基础课程实施分级教学的构想。分级教学可以使学生在时间有限、基础有别的条件下,选择适合自己的教学方法,从而获取最多的知识总量,因而是高校计算机基础课程教学改革的一个新方向．     

广义线性模型中拟似然估计的弱相合性及收敛速度

在非自然联系情形下讨论了广义线性模型拟似然方程的解βn在λ—n→∞和其他一些正则性条件下证明了解的弱相合性,并得到其收敛于真值β0的速度为Op(λ—n-1/2),其中λ—n(λ—n)为方阵Sn=iΣ=n1XiX'1的最小(最大)特征值.     

三角代数的F-卷积

利用文献[4]中的结论,探讨三角代数上F-卷积的结构,得到该卷积可以用环上的反自同构及双模上的反卷积双模同态表示.     

一类抛物型方程混合边值问题弱解的存在性和正则性

对一类抛物型方程的混合边值问题弱解的存在性和正则性进行了讨论．利用Lions定理建立抛物型方程混合边值问题弱解的存在性定理,然后在弱解存在的基础上利用差商方法,通过讨论弱解的导数所属空间来证明弱解的正则性．     

“弱者的宣言”——北美新移民文学的一种读法

北美新移民文学作为新移民文学中的重要一支,有着较为独特的文学叙事上的特征,具体体现为对北美新移民生存压力、语言隔阂、文化差异等诸多问题的演绎。在如何摆脱与超越弱者身份的叙事方式方面,北美新移民作家们有着自己不同的选择。这里面既有曹桂林、周励等早期作品中的那种对自我弱者身份的带有夸饰性的想象超越,也有如阎真、少君等用＂独立个体＂的自我表述将＂弱者＂身份的无形化解,更有严歌苓小说中所表达出的＂弱势对强势的慷慨的宽恕＂。