On a risk model with claim investigation

In this paper, a queue-based claims investigation mechanism is considered to model an insurer’s claim processing practices. The resulting risk model may be viewed as a first step in developing models with more realistic claim investigation mechanisms. Related to claim investigations, claim settlement delays and time dependent payments have been studied in a ruin context by, e.g. Taylor (1979), Cai and Dickson (2002), and Trufin et al. (2011). However, little has been done on queue-based investigation mechanisms. We first demonstrate the impact of a particular claim investigation system on some common ruin-related quantities when claims arrive according to a compound Poisson process, and investigation times are of a combination of exponential form. Probabilistic interpretations for the defective renewal equation components are also provided. Finally, via numerical examples, we explore various risk management questions related to this problem such as how claim investigation strategies can help an insurer control its activities within its risk appetite.     

Infrared spectroscopy provides a green analytical chemistry tool for direct diagnosis of cancer

Diagnosis of cancer is one of the most important aspects of medical research and has become the main aim of biomedical investigations. Misdiagnosis is the main drawback in most of the diagnostic routes introduced, while some of these methods are invasive and expensive.Recently, infrared spectroscopy (IR) was proposed as a rapid, accurate and sensitive technique in biomedical research, especially for detection of patterns of illness. We discuss research into cancer detection by IR, the role of data processing in quality assurance of the results obtained and novel proposals, such as bio-fluid analysis for diagnosis. We conclude that IR provides a novel green analytical chemistry approach to clinical oncology and cancer research.     

佛山市儿童铅中毒现状的调查

[目的 ]旨在了解佛山市儿童铅中毒的现状。 [方法 ]采用阳极溶出伏安法 ,测定佛山市41 6名 1～ 1 4岁儿童的血铅值。 [结果 ]儿童铅中毒率为 3 3 41 % ,不同性别儿童铅中毒率有明显差异 (P <0 0 1 ) ,不同年龄组血铅中毒率无明显差异 (P >0 0 5 )。 [结论 ]儿童铅中毒在不同地区存在一定差异。儿童铅中毒已不只是医学问题 ,应引起全社会的广泛关注。     

反应堆一回路不锈钢管道沉积物制备及去污的模拟研究

反应堆一回路管道通常以不锈钢为基材,长期运行中面临沉积物的产生及大量积累的问题.本文通过溶液反应模拟沉积物的产生,采用的水溶液中含有Ca2+、Mg2+,以及裂片核素137 Cs和活化核素60 Co的稳定同位素阳离子133 Cs+和59 Co2+,CO32-、SO42-等阴离子,以及基材氧化物Fe2 O3等;开展了沉积物...