Adapting property path for polynomial-time evaluation and reasoning on semantic web     

姜洋  冯志勇  王鑫  饶国政 《天津大学学报(英文版)》2013,19(2):130-139

Property path is the latest navigational extension of the standard query language SPARQL 1.1 for the Semantic Web.However,in the existing SPARQL query systems which support property path,the query efficiency is very low and does not support reasoning.This paper proposes a new existential semantics which has polynomial-time evaluation complexity and an equivalent relationship with the current semantics,and transforms the property path expressions to the extended nested regular expressions based on the existential semantics and proves the semantic equivalence after the transformation considering the RDFS semantics.The property path query engine is achieved by implementing the nested regular expressions algorithm and the transformation rules from the property path expressions to the nested regular expressions,which maintains the syntax simplicity of property path and the goal-oriented polynomial-time reasoning to avoid computing the RDF graph closure.The experiment results not only show the characteristics of query engine based on the existential semantics in efficiency and reasoning,but also further validate the equivalence between the results based on current semantics and those based on the existential semantics for property path after the removal of duplicate values.  相似文献   

矿物加工与综合利用实验中心建设与教学实践     

杨炳飞  王吉中  陈玉娥  饶俊  王雅静  张旭 《实验技术与管理》2013,30(1):130-133,141

中央与地方共建高校优势特色学科实验室项目——矿物加工与综合利用实验中心依照项目要求进行了建设实施。项目工作组通过周密规划、认真实施,于2008年1月至2010年1月分两期顺利完成了实验中心的全面建设。实验中心建筑面积640m2,分7个实验室,包括破碎机在内的各类设备200余台(套),年开实验项目56项,年人学时数8 400学时。实验中心重视人力建设,制定了严格的运行保障机制,不断改进实践教学内容与方法,教学效果评价良好。  相似文献   

Cancer in south Karnataka and its paradoxical relation to diabetes mellitus     

Maliyannar Itagappa  Shrinivas B. Rao 《Indian journal of clinical biochemistry : IJCB》2004,19(1):6-9

The present work identifies a high incidence of oral cancer in south Karnataka. The primary reason for this could be due to extensive addiction to tobacco alone or tobacco and alcohol in most of these patients. The next in intensity was cancer of the breast and cervix among the cancer patients surveyed in south Karnataka. Majority of these patients had no specific addiction and the exact reason for this high incidence remains unclear. Only a small percentage of patients exhibited other types of organ related cancer. It has been reported that the incidence percentage of diabetes mellitus and cancer in India, parallel each other. However, we observed a low incidence of diabetes mellitus patients also having cancer in south Karnataka. Though the exact reason for this remains unclear an attempt has been made here to explain this phenomenon, hypothetically using information in literature, which suggests a suppression of cellular regenerative activity by sugar and sugar phosphates. Cellular regenerative activity is well known to be a prerequisite for cancer.  相似文献   

Oxidative stress and antioxidants in tubercular meningitis     

K Sudha  Ashalatha V Rao  S. N. Rao  Anjali Rao 《Indian journal of clinical biochemistry : IJCB》2002,17(1):34-41

Oxidative stress is implicated in the etiopathogenesis of a variety of human diseases. Therefore, in the present study, erythrocyte lipid peroxidation, percentage hemolysis, antioxidant enzymes viz., glutathione reductase, glutathione peroxidase, superoxide dismutase and plasma antioxidants viz., ceruloplasmin, vitamins A,E and C have been determined in 19 patients with tubercular meningitis (TBM) and 50 normals. Six patients who were treated with antibiotics were considered for the follow up. The statistical analysis was carried out by Mann Whitney U test and Wilcoxon rank sum test. Lipid peroxidation (P<0.02), percentage hemolysis (P<0.001) and plasma ceruloplasmin (P<0.0001) of TBM patients were significantly higher, whereas erythrocyte glutathione reductase (P<0.05) and plasma antioxidant vitamins A, E and C (P<0.01, P<0.05 respectively) were significantly lower than those of the controls. In the follow up patients the glutathione reductase and catalase levels were significantly high (P<0.05) compared to their pre-treated condition. Vitamin C and E levels have attained normal range. This study indicated that the blood antioxidant status of TBM patients which was low compared to controls improved after treatment, suggesting the role of free radicals in TBM.  相似文献   

Maternal and fetal indicators of oxidative stress in various obstetric complications     

Guruprasad Rao  Ullas Kamath  Chaerkadi Raghothama  K. Sujatha Pradeep  Pragna Rao 《Indian journal of clinical biochemistry : IJCB》2003,18(2):80-86

The present study demonstrates the incidence of increased lipid peroxidation and protein oxidation in both maternal and fetal erythrocytes as markers of oxygen radical activity in different complications of pregnancy. In fetuses born after premature rupture of membranes, lipid peroxidation was significantly elevated as indicated by increased malondialdehyde levels (p<0.05) as compared to controls. Proteolytic activity in the erythrocytes of mothers in this group was also significantly high (p<0.01). In patients delivered by lower segment cesarian section, lipid peroxidation and proteolytic activity in maternal erythrocytes were significantly high (p<0.05 and p<0.001 respectively). In patients with prolonged second stage of labour, lipid peroxidation and proteolytic activity in maternal erythrocytes was significantly higher than in controls (p<0.001 and p<0.05 respectively). In this group, endogenous protein damage due to oxidative stress was significantly high both in the mother and the fetus (p<0.001 and p<0.05 respectively).  相似文献   

Two cases of hereditary fructose intolerance     

N Ananth  G. S. Praveenkumar  K Aravind Rao  Vasanthi  Srinivas Kakkilaya 《Indian journal of clinical biochemistry : IJCB》2003,18(2):87-92

Hereditary fructose intolerance is a rare cause of hepatic cirrhosis in the young. The disorder has a reported frequency of 1 in 20000 live births and no case has been reported from India so far. We report two cases of hereditary fructose intolerance, both with bilateral cataracts and one with cirrhosis of the liver.  相似文献   

中外合作办学宿舍文化潜在课程及学生感受的实证分析——以广东某高校为个案     

朱宇  冯瑞龙  饶智瑜 《保定师专学报》2011,(5):112-119

以广东省某中外合作办学高校为研究个案,对宿生发放了526份问卷,并对该校相关管理部门的负责人以及个别宿生进行了访谈,力求了解中外合作高校校方设计/引导的宿舍文化蕴含的潜在课程（含宿舍的物质文化、制度文化和精神文化三个层面）及学生对其的感受。研究结果表明：学生对中外合作办学宿舍文化潜在课程的整体评价大多数是正面而积极的,只有13.5%的学生表示不喜欢小镇的生活。大多数学生认同小镇生活,认为其让他们获得了独立的生活能力并学会了人际交往技巧,学生对于三个层面潜在课程功效的认同度由高到低分别为物质、制度、精神。  相似文献   

青少年网络成瘾、父母监控与其社会适应的关系   总被引：1，自引：0，他引：1  

王莉  邹泓  么娆 《中国特殊教育》2011,(5)

以全国2139名中学生为被试,采用问卷法考查了青少年网络使用现状,并探讨了父母监控在网络成瘾与社会适应之间的作用.结果:(1)25.5%的父母经常指导孩子上网,结交新网友是报告最多的网络潜在危险行为.(2)网络成瘾存在显著的性别、年级差异.(3)在社会适应的积极维度,网络成瘾者得分显著低于非成瘾者;消极维度则与之相反.(4)父母监控在网络成瘾与社会适应的关系中起调节作用.  相似文献   

Analysis of Bcl I and Xba I polymorphism in factor VIII gene to detect carriers of haemophilia a in Andhra Pradesh     

P. Aruna Prabhavathi  Tajamul Hussain  G. N. Mallikarjuna Rao  MP JS Anandaraj 《Indian journal of clinical biochemistry : IJCB》2002,17(1):94-98

The efficacy of two intragenic polymorphic markers of factor VIII gene has been examined in Andhra Pradesh population with a view to confirm/revise the strategy for carrier detection that would be precise and economical. The haemophilia A carrier was detected using Bcl I and Xba I polymorphic sites in intron 18 and 22 respectively. The cumulative efficiency of these two sites for detection of carriers is 100% since all 15 families tested were informative for one of these polymorphisms, thus confirming their usefulness for factor VIII gene mutations found in Andhra Pradesh.  相似文献   

诗歌·民众·时代——读鲍勋诗歌兼谈当代诗歌的出路     

饶艳 《佳木斯教育学院学报》2014,(9)

鲍勋是十堰市一位非常有影响力的诗人,其诗作内容广泛、贴近时代、生活。因此受到当发民众的喜爱。在一个诗歌逐渐被边缘化的时代,能投入了自己全部热忱进行创作,并能有这样强烈的社会反响,鲍勋的诗歌在某种程度上为我们思考新诗的发展方向,提供了一些很好的思路。  相似文献