多属性决策模型研究及应用

针对现实多属性决策问题的复杂性,提出了基于组合赋权和区间灰数的TOPSIS方法多属性决策模型。通过组合赋权确定权重并引进区间灰数描述决策者评价信息的不确定性,结合TOPSIS方法建立决策模型。最后结合实例证明该模型的有效性。     

基于模糊组合权的模糊TOPSIS方法在供应商选择中的应用研究

供应商的选择在供应链管理中是很重要环节,供应商选择的成功与否将直接影响到整个供应链的竞争优势,故有必要对供应商选择进行深入研究。本文将已有的模糊组合权方法和模糊TOPSIS方法相结合,提出一种基于模糊组合权的模糊TOPSIS方法,并将其应用于供应商的选择研究中。文章首先总结已有的相关研究结果,给出供应商评价的准则,接着介绍三角模糊数的相关理论,推出模糊组合权及模糊TOPSIS的算法步骤,最后通过一个算例验证方法的可行性。     

The asymptotic distribution of Nagar's bias-adjusted TSLS estimator under partial identification

The asymptotic distribution of the Nagar bias-adjusted two-stage-least-squares estimator is studied under the assumption of partial identification when the number of instruments increases at the same rate as the sample size and the errors are normally distributed.     

Measures of economies with an arbitrarily large number of equilibria

Balasko (1978) shows that in a compact subset of the space of economies, not too many economies can have too many equilibria. We extend Balasko’s result to the whole set of economies for a suitable measure. We show that the measure of economies with a large number of equilibria approaches zero as this number tends to infinity. An analogous result in the infinite‐dimensional setting is also established.     

FDI对东道国就业的影响研究文献综述

随着全球化的深入、国际贸易的推进，国内外专家学者从各个角度对FDI对东道国就业的影响进行了研究。本文将从FDI对东道国的就业数量、就业质量、就业结构及就业地区经济四个方面的影响来综述国内外专家学者对FDI对东道国就业的影响的研究成果，最后作出总结并提出展望。     

基于三角模糊数和一种新标度层次分析法的物流园区规划的综合评价

目前,随着物流行业的兴起,我国对物流园区的规划与建设也逐渐增多。但是,对物流园区规划的综合评价却很少,仓促建设,盲目投资,最终,园区建成后空置率高,造成极大的浪费。论文通过建立三角模糊数和一种新标度层次分析法的模型,消除主观判断的模糊性,定量与定性因素相结合,对园区规划中的因素逐层排序,最后综合评价物流园区规划方案,比较各方案的优劣。     

Number needed to treat based on real-world evidence for non-vitamin K antagonist oral anticoagulants versus vitamin K antagonist oral anticoagulants in stroke prevention in patients with non-valvular atrial fibrillation

Aims: Non-vitamin K antagonist oral anticoagulants (NOACs) and vitamin K antagonists (VKAs) are used to prevent stroke in patients with atrial fibrillation (AF). This paper aimed to evaluate the clinical efficacy and safety of NOACs when compared to VKAs by calculating the number needed to treat (NNT) at 2 years using incidence rates and hazard ratios (HRs) derived from a meta-analysis of studies conducted in real-world settings.

Materials and methods: HRs were sourced from a published systematic literature review and a meta-analysis of real-world evidence on the use of NOACs vs VKAs. Rivaroxaban, dabigatran, and apixaban vs VKAs were investigated. The efficacy outcomes included: a composite of ischaemic stroke and systemic embolism (IS/SE), ischaemic stroke (IS), and all-cause mortality. The safety analysis assessed major bleeding and intracranial haemorrhage (ICH).

Results: Superiority of NOACs vs VKAs was observed in 10/15 comparisons. Treating patients with rivaroxaban and dabigatran was associated with a reduced risk of IS and all-cause mortality compared to VKAs, with one death prevented every 22 and 32 patients, respectively, and one IS prevented every 206 and 166 patients, respectively. Rivaroxaban was significantly associated with a reduced risk of IS/SE compared to VKA (NNT: 107). No significant differences were observed between apixaban and VKAs. Dabigatran and apixaban were associated with a reduced risk of major bleeding compared to VKA (NNT: 59 and 38, respectively). No significant difference was observed between rivaroxaban and VKAs regarding major bleeding. Rivaroxaban, dabigatran, and apixaban were significantly associated with a reduced risk of ICH (NNT: 205, 115, and 108, respectively).

Limitations: Heterogeneity in definitions of major bleeding across studies.

Conclusions: The NNT calculation, when approached and interpreted properly, is a practical measure of the effectiveness of a treatment. The calculation based on HRs showed that NOACs are safe and effective alternatives to VKAs in real life.     

我国财政转移支付制度存在的问题及对策

财政转移支付制度是我国现行分税制条件下实现公共服务均等化的重要手段。然而，我国实施多年的财政转移支付制度在实现均等化目标方面的效果并不明显，还存在一系列的问题。完善我国财政转移支付需要进一步提高两个比重，扩大转移支付规模；加强转移支付立法；明确中央与地方的事权、财权范围；完善省以下转移支付制度等。     

多指标施工方案优选的新方法

用集对分析的联系数客观地描述工程施工方案中质量、费用、工期和资源不均衡系数4项指标，既相互联系，又相互影响的状况。在4项指标权重不同的情况下，通过计算联系数的数值，取联系数的数值大的方案为优，解决了多方案多指标线性加权选优过程中综合选优结果不可分辨的问题。     

直扩系统中数字匹配滤波器的设计仿真

主要讨论了量化比特数和取样间隔对数字匹配滤波器（DMF）解扩电路性能的影响，通过直扩系统（DSSS）的仿真结果表明；DMF的量化比特数取3时，量化误差可忽略不计（近似为无穷量化结果）；而在低抽样率下依靠DMF的样值序列前端处理（FEP）可以使系统误码率达到高抽样率的效果，而硬件代价却大大减小。