摘要：睡眠呼吸暂停综合征(Sleep Apnea Syndrome,SAS)是一种发病率高,具有潜在危险性的疾病。其分析诊断主要依赖于多参数自动监测仪,其中呼吸参数是重要的检测参数。本文研究了基于温感式检测法的检测原理,分析了传感器的动态特性,探讨了干扰产生的原因,提出了干扰的抑制方法,设计了相关的检测电路和数据采集电路,实现了呼吸参数的检测。

摘要：In this paper, we present the general theory and universal properties of weak crossed biproducts. We prove that every weak projection of weak bialgebras induces one of these weak crossed structures. Finally, we compute explicitly the weak crossed biproduct associated with a groupoid that admits an exact factorization.

摘要：Unified Parallel C （UPC） is a parallel extension of ANSI C based on the Partitioned Global Address Space （PGAS） programming model, which provides a shared memory view that simplifies code development while it can take advantage of the scalability of distributed memory architectures. Therefore, UPC allows programmers to write parallel applications on hybrid shared/distributed memory architectures, such as multi-core clusters, in a more productive way, accessing remote memory by means of different high-level language constructs, such as assignments to shared variables or collective primitives. However, the standard UPC collectives library includes a reduced set of eight basic primitives with quite limited functionality. This work presents the design and implementation of extended UPC collective functions that overcome the limitations of the standard collectives library, allowing, for example, the use of a specific source and destination thread or defining the amount of data transferred by each particular thread. This library fulfills the demands made by the UPC developers community and implements portable algorithms, independent of the specific UPC compiler/runtime being used. The use of a representative set of these extended collectives has been evaluated using two applications and four kernels as case studies. The results obtained confirm the suitability of the new library to provide easier programming without trading off performance, thus achieving high productivity in parallel programming to harness the performance of hybrid shared/distributed memory architectures in high performance computing.

摘要：随着我国航空技术的迅速发展,防冰/除冰技术的研究越来越受到重视,系统中结冰探测器直接影响防冰/除冰的效果。文中对一种基于磁感原理的结冰探测器进行了分析,通过建模推导出相关参数的计算方法,并进行了仿真试验。笔者解决了结冰探测器基本设计参数计算的问题,为结冰探测器的设计提供了一种有效方法。

摘要：背景:肝毒性反应是抗结核药物(下简称ATD)最严重的不良反应之一。虽然已有许多关于肝毒性反应危险因素的报道,但关于肝毒性反应严重程度的影响尚无系统研究。目的:评估肝毒性反应的危险因素(包括高龄、慢性肝病、酗酒或滥用药物或营养不良)对ATD所致肝毒性反应严重性的影响。设计:对1998年1月至2002年7月期间在结核科门诊接受异烟肼、利福平、吡嗪酰胺治疗的471例活动性结核病人进行前瞻性队列分析。根据ATD所致肝毒性反应危险因素的暴露情况评价肝毒性反应的发生率及其严重性。结果:危险因素暴露组ATD所致肝毒性反应(血清转氨酶>3倍的正常上限值)的发生率为18.2%(42/231例),而对照组为5.8%(14/240例),(OR=3.5;95%CI:1.9-6.7;P10倍的正常上限值)发生率为6.9%(16/231),而对照组为0.4%(1/240)(OR=17.7;95%CI:2.3-135;P<0.001)。结论:肝毒性反应危险因素暴露组病人的ATD所致肝炎显著多见且较为严重。