Relative risk factors of in-hospital death due to aortic dissection

目的分析主动脉夹层(Ad)患者院内死亡的相关危险因素。方法回顾性分析厦门市心脏中心2002年1月至2011年10月确诊急性Ad患者175例的临床资料,其中男性129例,女性46例,平均年龄(56.8±12.1)岁。按住院期间是否死亡进行分组,分为存活组(n=141)及死亡组(n=34),分析年龄、性别、既往病史、血压水平、症状、并发症及实验室指标与死亡的相关性,并用lOgISTIC回归分析危险因素与病死率的关系。结果与存活组比较,死亡组d-二聚体水平升高,意识障碍和心包填塞比例增加,手术或支架治疗比例减少,差异有统计学意义(P均<0.05)。lOgISTIC回归分析结果表明,d-二聚体水平升高(Or=1.325,95%CI:1.436~1.973,P=0.004)、伴意识障碍(Or=2.481,95%CI:1.302~3.203,P=0.003)、心包填塞(Or=7.726,95%CI:1.762~34.003,P=0.008)为Ad患者住院死亡的独立危险因素,手术或介入治疗(Or=0.101,95%CI:1.762~34.003,P=0.044)为保护因素。结论 Ad患者中d-二聚体明显升高,并发意识障碍、心包填塞者病死率高,临床上应予高度重视,依据病情采取手术或介入治疗有利于降低Ad患者的病死率。Objective To analyze the relative risk factors of in-hospital death in patients with aortic dissection(AD).Methods The clinical materials of patients with acute AD [n=175, male 129, female 46 and average age was(56.8±12.1)] were analyzed retrospectively from Jan.2002 to Oct.2011, and all patients were divided into survival group(n=141) and death group(n=34).The correlation between age, sex, medical history, blood pressure level, symptoms, complications or laboratory indexes and death was analyzed, and the relatio level increased, and the percentage of patients with consciousness disorder and cardiac tamponade increased and percentage of patients with surgery or stenting decreased(all P<0.05).The results of Logistic regression analysis showed that increased D-dinship between risk factors and mortality was analyzed by using Logistic regression analysis.ResultsCompared with survival group, in death group D-dimermer level(OR=1.325, 95%CI: 1.436~1.973, P=0.004), consciousness disorder(OR=2.481, 95%CI: 1.302~3.203, P=0.003) and cardiac tamponade(OR=7.726, 95%CI: 1.762~34.003, P=0.008) were independent risk factors of in-hospital death, and surgery or interventional treatment(OR=0.101, 95%CI: 1.762~34.003, P=0.044) were protective factors in AD patients.Conclusion Mortality is higher in patients with increased D-dimer level or complicating consciousness disorder and cardiac tamponade.Surgery and interventional treatment can reduce the mortality

动脉粥样硬化性肾动脉狭窄的早期发现

探讨冠状动脉造影同时行肾动脉造影的必要性及动脉粥样硬化性肾动脉狭窄的相关危险因素分析。共 4 91例临床疑似冠心病患者行冠状动脉造影同时行非选择性或选择性肾动脉造影 ,并对相关的临床因素进行评价 ,筛选出动脉粥样硬化性肾动脉狭窄的独立危险因素。冠心病组患者中动脉粥样硬化性肾动脉狭窄的发病率为2 0 % ,显著高于非冠心病组 (2 .6 % )。冠心病、外周血管疾病是动脉粥样硬化性肾动脉狭窄的独立危险因素 (多元Logistic回归分析示 ,P <0 .0 0 1、P =0 .0 0 3) ,是其早期发现的指标。对怀疑有冠心病的患者 ,在冠状动脉造影同时行肾动脉造影有助于动脉粥样硬化性肾动脉狭窄的早期发现

Category role aided market segmentation approach to convenience store chain category management

National Nature Science Foundation of China [70971112, 71301133, 71371159]; Humanity and Social Science Youth Foundation of Ministry of Education, China [13YJC630033]Category management (CM) plays an increasingly important role in retailing management, as it aids retailers to increase their core competitiveness, maximise profits and ensure a good long-term customer relationship. This technique has been successfully applied to diverse large manufacturers and wholesale retailers. However, it remains a challenging task to directly employ the CM technique in convenience store (CVS) chain(s). This is because CVS chains are often distributed in a variety of areas, each store has impulsive consumers, and the traditional market segmentation attributes (e.g. consumer age, salary, and background) are difficult to collect under such circumstances. This makes it impractical to apply one general CM solution to all CVS chains. Hence, it is crucial to segment a market region and then apply customised CM solutions to the corresponding segments. This paper presents an innovative market segmentation model which is driven by category-role (CR), for the first time, to support CM in CVS chains. A new similarity measure (named HCsim()) and an improved weighted fuzzy K-means clustering algorithm (WFKM) are developed in an effort to cluster the CVSs. The usefulness and applicability of this study is illustrated by means of an empirical study to provide marketing strategy decision support. The derived results are also discussed and compared with existing methods. (C) 2013 Elsevier B.V. All rights reserved

干旱内陆河流域水盐监测与模型研究及应用

课题的研究内容包括：流域、灌区、田间、剖面尺度水盐监测网点的布设与监测；水均衡参数的试验及土壤水盐动力学模型与土壤水盐均衡模型的构建；干旱区水盐平衡模型理论与推广应用；水盐平衡与地下水数值模型在开孔河流域重点工程规划中的应用；土壤水模型模拟节水灌溉与土壤盐碱化防治的关系；开孔河流域平原灌区最佳地下水埋深以及调控模式；近50年博斯腾湖与孔雀河水盐演变过程；地下水质模拟与水源地保护区域划分研究。所取得的科研成果可以广泛应用于干旱内陆河流域水资源评价和水、土资源管理，必将产生巨大的生态效益、经济效益和社会效益

阿克苏河灌区棉花耐盐指标的确定/Indexes of Salt Tolerance of Cotton in Akesu River Irrigation District[J]

[目的]通过建立阿克苏河灌区棉花产量与其相应的土壤含盐量的响应关系,即棉花盐分生产函数模型:分段式线性函数模型和非线性-S型函数模型,确定该地区棉花的耐盐指标.[方法]根据3年4地大田定位观测的棉花产量和土壤盐分数据,通过线性回归分析法和非线性最小二乘法分别得出O-20 cm和O-40 cm土层的2种模型,对比分析函数模型的适用性,依据适用性更强的土层模型计算棉花的耐盐指标.[结果]分别拟合出O-20 cm和O-40cm土层的分段线性函数模型和非线性-s型函数模型,其中非线性-S型盐分生产函数模型拟合精度较高.[结论]阿克苏河灌区(0-20 cm土层)棉花的耐盐临界值、时盐极限值、减产速率最大时的土壤盐分含量、减产50%时的土壤盐分含量分别为O.302%、1.119%、O.558%、O.581%