长螺旋钻孔管内泵压CFG桩复合地基施工技术

文章根据某工程应用CFG桩的实际情况,详细介绍了长螺旋钻孔管内压CFG桩的主要特点、适用范围、技术原理,并对其施工工艺进行了探讨。     

Pediatric gastroesophageal reflux disease and acid-related conditions: trends in incidence of diagnosis and acid suppression therapy

Abstract

Objective: To describe the incidence of diagnosis of gastroesophageal reflux disease and acid-related conditions (GERD/ARC) throughout childhood and characterize patterns of diagnosis and treatment with proton pump inhibitors (PPIs) and histamine-2 receptor antagonists (H₂RAs).

Methods: Cohorts of GERD/ARC children (age 0–18 years) were identified from a large US administrative claims database covering 1999–2005 using ICD-9 codes. Incidence, healthcare utilization (HCU), costs, therapy discontinuation and switching rates were compared between various age and patient groups.

Results: Between 2000 and 2005 annual incidence of GERD/ARC diagnosis among infants (age ≤1 year) more than tripled (from 3.4 to 12.3%) and increased by 30% to 50% in other age groups. Patients diagnosed by GI specialists (9.2%) were more likely to be treated with PPIs compared to patients diagnosed by primary care physician (PCP). PPI-initiated patients doubled (from 31.5% in 1999 to 62.6% in 2005) and, when compared with H₂RA-initiated patients, were associated with 30% less discontinuation and 90% less therapy switching in the first month, and with higher comorbidity burden and pre-treatment total HCU and costs when diagnosed by GI specialists.

Limitations: The use of an exploratory definition for GERD/ARC, administrative claims data and potential coding errors in diagnosis codes used in selection process may limit the generalizability of the results.

Conclusions: GERD/ARC incidence increased for children of all ages between 2000 and 2005. PCPs made the majority of diagnoses. PPI initiations have now surpassed H₂RA initiations.     

节能技术在建筑设备工程中的应用与探讨

伴随着我国经济高速发展、产业结构调整及世界性能源紧缺的大背景下,建筑节能已经成为建筑行业必须面对、考虑和解决的问题。本文从建筑设备工程所涉及的给排水管网系统的减压节流、水泵的变频控制,空气调节系统节能技术,电气系统节能技术等几方面进行阐述。节能技术在建筑设备工程中的应用与开展,有着重大的社会效益、经济效益和业主效益,同时也是社会和建筑行业发展的必然。     

三玻窗在青海地区的应用

本文通过对几种建筑外窗保温性能的分析,探讨了青海地区根据实际气候情况选择应用三玻窗的可行性。     

ASYMPTOTICS OF IMPLIED VOLATILITY IN LOCAL VOLATILITY MODELS

Using an expansion of the transition density function of a one‐dimensional time inhomogeneous diffusion, we obtain the first‐ and second‐order terms in the short time asymptotics of European call option prices. The method described can be generalized to any order. We then use these option prices approximations to calculate the first‐ and second‐order deviation of the implied volatility from its leading value and obtain approximations which we numerically demonstrate to be highly accurate.     

聚氯乙烯热稳定剂种类的研究现状

概述了聚氯乙烯(PVC)的热降解机理及热稳定剂的作用机理,重点介绍了铅盐类稳定剂、金属皂类稳定剂、有机锡类稳定剂、稀土类稳定剂等的研究发展情况,对热稳定剂的发展趋势进行了展望。     

论教学督导模式对提高高职院校教学质量的保障作用

教学督导对高校教学质量的提高起着保驾护航的作用,为了有效地发挥督导体系对高职院校教学质量的保障作用,应当健全教学督导工作制度,形成特色的高职高专督导运行模式,丰富并拓展教学督导工作的方法和内涵,构建科学合理的督导运行机制。     

带内筒立式大型压力容器现场整体热处理施工工法

文章结合工程实践,对采用燃油内燃法工法对大型压力容器进行整体热处理作深入分析及探讨。     

节能型围护结构的设计与应用

节约能源是我国的基本国策,建筑节能则是国家节能工作的重中之重。文章论述了建筑节能的原理,从节能角度分析了建筑设计须重视的若干问题,并重点分析了屋面与墙体等外围护结构中主要的节能技术应用。     

室外空调管道及供热工程设计

文章对室外空调管道及供热工程完成了设计,着重解决了管道走向、管径、可靠性、安全度、保温、供热方案的选择等问题。