基于自适应门限MDL方法的TDMA突发特征码检测

阐述了基于最小描述长度(MDL)方法来进行特征码检测,根据检测量分布的推导结果,提出了检测门限对检测性能、特征码位置不确定性和信噪比变化自适应的MDL特征码检测方法。当基于特征码进行通信信号分选时,新方法具有更好的应用灵活性,且检测性能对频偏具备鲁棒性。     

高频地波雷达消除一阶海杂波对目标测距影响的方法

在强海杂波条件下的高频地波雷达中,由于相干积累所需的时间较长,并且由于信号带宽较窄、距离门较宽,所以无法得到目标在积累时间内的距离变化。为此,提出了一种在多普勒域进行滤波的方法,首先滤除一阶海杂波对目标回波的影响,然后利用Chirp-z变换和稀疏表示等办法来提高积累时间内的距离精度和分辨率。理论分析和仿真验证了该方法的可行性。     

混沌噪声调频信号对UWB—SAR／ISAR成像的干扰

建立了n-Way Bernoulli混沌调频信号模型,分析了UWB-SAR/ISAR的成像特点,提出利用Bernoulli混沌噪声调频信号对UWB-SAR/ISAR进行成像干扰。仿真结果表明,利用Bernoulli混沌噪声调频信号干扰UWB-SAR/ISAR是可行的。     

中国国有银行改革的比较制度分析

中国国有银行经历了多次改革而未能实现预期的商业化改革目标,甚至在其股份制改革后也很难说建立了现代银行制度。本文利用比较制度分析方法,从制度互补视角对此原因进行分析,本文的结论是,中国的金融改革只是经济体制整体改革的一部分,国有银行改革是在与企业改革和政府职能转变的互动中实现的。     

基于"写长法"理论的英语写作教学研究

在英语写作教学中,以"写长法"理论为指导,精心设计写作任务,采用多鼓励的作文纠错原则,提高学生的英语写作水平。     

Burden of illness associated with sinusoidal obstruction syndrome/veno-occlusive disease in patients with hematopoietic stem cell transplantation

Aims: Sinusoidal obstruction syndrome (SOS) is a life-threatening complication of hematopoietic stem cell transplantation (HSCT) associated with significant morbidity and mortality. Healthcare utilization, costs, and mortality were assessed in HSCT patients diagnosed with SOS, with and without multi-organ dysfunction (MOD).

Materials and methods: This retrospective observational study identified real-world patients undergoing HSCT between January 1, 2009 and May 31, 2014 using the Premier Healthcare Database. In absence of a formal ICD-9-CM diagnostic code, SOS patients were identified using a pre-specified definition adapted from Baltimore and Seattle criteria and clinical practice. Severe SOS (SOS/MOD) and non-severe SOS (SOS/no-MOD) were classified according to clinical evidence for MOD in the database.

Results: Of the 5,418 patients with a discharge diagnosis of HSCT, 291 had SOS, with 134 categorized as SOS/MOD and 157 as SOS/no-MOD. The remaining 5,127 patients had HSCT without SOS. Overall SOS incidence was 5.4%, with 46% having evidence of MOD. Distribution of age, gender, and race were similar between the SOS cohorts and non-SOS patients. After controlling for hospital profile and admission characteristics, demographics, and clinical characteristics, the adjusted mean LOS was 31.0 days in SOS/MOD compared to 23.9 days in the non-SOS cohort (medians?=?26.9 days vs 20.8 days, p?p?Limitations: Limitations of retrospective observational studies apply, since the study was not randomized. Definition for SOS was based on ICD-9 diagnosis codes from a hospital administrative database and reliant on completeness and accuracy of coding.

Conclusions: Analysis of real-world data shows that SOS/MOD is associated with significant increases in healthcare utilization, costs, and inpatient mortality.     

The Residency Discount for Rents in Germany and the Tenancy Law Reform Act 2001: Evidence from Quantile Regressions

Most countries show a residency discount in rents for sitting tenants. In the wake of strong rent increases and housing shortages, Germany implemented a reform in 2001 to curtail rent increases. Based on linked housing‐tenant data for Germany, this paper estimates panel OLS and quantile regressions of rents within tenancies. The results show that rents deflated by the CPI increase strongly from 1984 until the reform in 2001, and there is a reversal in the trend afterwards. Before the reform, there is a significant residence discount which decreases in absolute value with tenure. The reform reduces rents, in particular for expensive apartments and for new leases. There is no residency discount after the reform.     

Cusum Techniques for Technical Trading in Financial Markets

It is discovered that the CUSUM techniques often used in the manufacturing industry can be adapted to yield a trading strategy in the financial market. The familiar filter trading strategy in finance is found to be a particular case of CUSUM procedures. A more general form of the CUSUM techniques will yield new trading strategies which have intuitive appeals. Trading characteristics of such strategies will be investigated using CUSUM techniques.     

Economic Process Control

A simple method is developed how to determine a nearly optimal economic sampling design tor current process control. A comparison between Shewhart and non Shewhart techniques reveals that under the assumptions of a normally distributed quality characteristic and an exponentially distributed time of production in the state of control the superiority of non Shewhart techniques is in general of no importance.     

A Classification of Two-Factor Affine Diffusion Term Structure Models

Dai and Singleton (2000) introduced a typology of affine diffusionmodels when the domain of admissible values of the factors isan intersection of half planes and under some additional constraintson the parameters. This condition on the domain and the additionalsufficient constraints are restrictive and can considerablydiminish the practical interest of affine models. In this articlewe successfully address the research agenda sketched by Duffie,Filipovic, Schachermayer (2003, section 12.2, p. 1042). A systematicinvestigation is performed and our article provides a completetypology in the two-factor case, without prior restrictionson the domain and on the parameters.