针对民用机场跑道侵入问题,提出领域本体和语义Web规则语言(semantic Web rule language,SWRL)技术,构建一种智能严重度评估本体框架模型。将本体概念引入到跑道侵入严重度评估知识库的构建中,设计本体知识库的构建方法,描述各步骤的具...针对民用机场跑道侵入问题,提出领域本体和语义Web规则语言(semantic Web rule language,SWRL)技术,构建一种智能严重度评估本体框架模型。将本体概念引入到跑道侵入严重度评估知识库的构建中,设计本体知识库的构建方法,描述各步骤的具体构建过程,说明规则推理的关键技术。通过规则推理分析跑道侵入场景,得出跑道侵入严重度和应对措施。以实例验证了该方法的可行性。展开更多
Atrophic gastritis, is the main consequence of long-standing Helicobacter pylori infection, and is linked to the development of gastric cancer. The severity of atrophic gastritis is related to the lifetime risk of gas...Atrophic gastritis, is the main consequence of long-standing Helicobacter pylori infection, and is linked to the development of gastric cancer. The severity of atrophic gastritis is related to the lifetime risk of gastric cancer development, especially in terms of its degree and extent of mucosal damage. Therefore, it is important for clinicians to assess the severity of atrophic gastritis, interfere with the disease progress, and reverse gastric mucosal atrophy. In the article, we demonstrated some methods (conventional endoscopy, modern endoscopic technology and noninvasive methods) that may help assess the severity of atrophic gastritis and select the reasonable treatment protocols.展开更多
AIM:To develop a novel endoscopic severity model of intestinal Behcet's disease(BD) and to evaluate its feasibility by comparing it with the actual disease activity index for intestinal Behcet's disease(DAIBD)...AIM:To develop a novel endoscopic severity model of intestinal Behcet's disease(BD) and to evaluate its feasibility by comparing it with the actual disease activity index for intestinal Behcet's disease(DAIBD).METHODS:We reviewed the medical records of 167 intestinal BD patients between March 1986 and April 2011.We also investigated the endoscopic parameters including ulcer locations,distribution,number,depth,shape,size and margin to identify independent factors associated with DAIBD.An endoscopic severity model was developed using significant colonoscopic variables identified by multivariate regression analysis and its correlation with the DAIBD was evaluated.To determine factors related to the discrepancy between endoscopic severity and clinical activity,clinical characteristics and laboratory markers of the patients were analyzed.RESULTS:A multivariate regression analysis revealed that the number of intestinal ulcers(≥ 2,P = 0.031) and volcanoshaped ulcers(P = 0.001) were predictive factors for the DAIBD.An endoscopic severity model(Y) was developed based on selected endoscopic variables as follows:Y = 47.44 + 9.04 × non-Ileocecal area + 11.85 ×≥ 2 of intestinal ulcers + 5.03 × shallow ulcers + 12.76 × deep ulcers + 4.47 × geographicshaped ulcers + 26.93 × volcano-shaped ulcers + 8.65 ×≥ 20 mm of intestinal ulcers.However,endoscopic parameters used in the multivariate analysis explained only 18.9% of the DAIBD variance.Patients with severe DAIBD scores but with moderately predicted disease activity by the endoscopic severity model had more symptoms of irritable bowel syndrome(21.4% vs 4.9%,P = 0.026) and a lower rate of corticosteroid use(50.0% vs 75.6%,P = 0.016) than those with severe DAIBD scores and accurately predicted disease by the model.CONCLUSION:Our study showed that the number of intestinal ulcers and volcano-shaped ulcers were predictive factors for severe DAIBD scores.However,the correlation between endoscopic severity and DAIBD(r = 0.434) was weak.展开更多
The aim of this study is to report the length-weight relationship parameters （a and b） for some economically important fish species from Iranian freshwaters. The length-weight relationships （LWR） are calculated fo...The aim of this study is to report the length-weight relationship parameters （a and b） for some economically important fish species from Iranian freshwaters. The length-weight relationships （LWR） are calculated for six freshwater fish species collected during 2006 and 2007 in Iran. The values of the exponent b in the LWR （W=aL^b） vary between 2.985 and 3.543. The LWR with high correlation coefficient （r^2） is significant for all the species. These parameters axe of great importance to evaluate the relative condition of populations, biology, species management and their fisheries and stock assessment. The application of the length-weight relationships presented here should be limited to the observed length ranges.展开更多
文摘针对民用机场跑道侵入问题,提出领域本体和语义Web规则语言(semantic Web rule language,SWRL)技术,构建一种智能严重度评估本体框架模型。将本体概念引入到跑道侵入严重度评估知识库的构建中,设计本体知识库的构建方法,描述各步骤的具体构建过程,说明规则推理的关键技术。通过规则推理分析跑道侵入场景,得出跑道侵入严重度和应对措施。以实例验证了该方法的可行性。
文摘目的 分析2003年4月至2011年12月间复旦大学附属中山医院收治的临床诊断肺高压患者102例的临床特点及评估其严重度.方法 采用回顾性方法分析肺高压的好发年龄,病因分布,临床症状,超声心动图及右心导管检查结果的相关性及其对疾病严重度的评估.结果 肺高压中女性患者占多数为72.5％,其发病的峰值年龄段为中青年.肺高压的主要症状为活动后气促（81.4％）,静息或活动时胸闷（51.9％）.病因前三位为：特发性肺高压49例（占48.0％）,先天性体-肺分流19例（占18.6％）,慢性肺血栓栓塞10例（占9.8％）.用超声心动图法测定的肺动脉收缩压（sPAP）与“金标准”右心导管法比较,在绝对数值上存在差异：数值之差（绝对值）为1～10 mm Hg的占33.4％,11～20 mmHg占33.3％,≥21 mm Hg占33.3％.两法经直线回归分析,相关系数r=0.634（P＜0.01）.9例经右心导管测压证实为轻～中度肺高压中,超声心动图结果均为高估.但超声心动图在判断重度肺高压时准确性高,其与右心导管的一致性高达95.23％.结论 超声心动图与右心导管检测的一致性较好,它是诊断肺高压的重要线索.超声检查阴性预测值高,阴性基本可排除肺高压诊断.超声判断重度肺动脉高压准确性高.超声判断的轻～中度肺高压需结合病史、症状、生化指标等综合分析,必要时推荐行右心导管检查.
基金Supported by the Shanghai Leading Academic Discipline Project, No. J50305
文摘Atrophic gastritis, is the main consequence of long-standing Helicobacter pylori infection, and is linked to the development of gastric cancer. The severity of atrophic gastritis is related to the lifetime risk of gastric cancer development, especially in terms of its degree and extent of mucosal damage. Therefore, it is important for clinicians to assess the severity of atrophic gastritis, interfere with the disease progress, and reverse gastric mucosal atrophy. In the article, we demonstrated some methods (conventional endoscopy, modern endoscopic technology and noninvasive methods) that may help assess the severity of atrophic gastritis and select the reasonable treatment protocols.
文摘AIM:To develop a novel endoscopic severity model of intestinal Behcet's disease(BD) and to evaluate its feasibility by comparing it with the actual disease activity index for intestinal Behcet's disease(DAIBD).METHODS:We reviewed the medical records of 167 intestinal BD patients between March 1986 and April 2011.We also investigated the endoscopic parameters including ulcer locations,distribution,number,depth,shape,size and margin to identify independent factors associated with DAIBD.An endoscopic severity model was developed using significant colonoscopic variables identified by multivariate regression analysis and its correlation with the DAIBD was evaluated.To determine factors related to the discrepancy between endoscopic severity and clinical activity,clinical characteristics and laboratory markers of the patients were analyzed.RESULTS:A multivariate regression analysis revealed that the number of intestinal ulcers(≥ 2,P = 0.031) and volcanoshaped ulcers(P = 0.001) were predictive factors for the DAIBD.An endoscopic severity model(Y) was developed based on selected endoscopic variables as follows:Y = 47.44 + 9.04 × non-Ileocecal area + 11.85 ×≥ 2 of intestinal ulcers + 5.03 × shallow ulcers + 12.76 × deep ulcers + 4.47 × geographicshaped ulcers + 26.93 × volcano-shaped ulcers + 8.65 ×≥ 20 mm of intestinal ulcers.However,endoscopic parameters used in the multivariate analysis explained only 18.9% of the DAIBD variance.Patients with severe DAIBD scores but with moderately predicted disease activity by the endoscopic severity model had more symptoms of irritable bowel syndrome(21.4% vs 4.9%,P = 0.026) and a lower rate of corticosteroid use(50.0% vs 75.6%,P = 0.016) than those with severe DAIBD scores and accurately predicted disease by the model.CONCLUSION:Our study showed that the number of intestinal ulcers and volcano-shaped ulcers were predictive factors for severe DAIBD scores.However,the correlation between endoscopic severity and DAIBD(r = 0.434) was weak.
文摘The aim of this study is to report the length-weight relationship parameters （a and b） for some economically important fish species from Iranian freshwaters. The length-weight relationships （LWR） are calculated for six freshwater fish species collected during 2006 and 2007 in Iran. The values of the exponent b in the LWR （W=aL^b） vary between 2.985 and 3.543. The LWR with high correlation coefficient （r^2） is significant for all the species. These parameters axe of great importance to evaluate the relative condition of populations, biology, species management and their fisheries and stock assessment. The application of the length-weight relationships presented here should be limited to the observed length ranges.
