当代大学生消极价值取向及其对策

当前部分大学生存在不少消极价值取向，如否定生命、铺张浪费、金钱至上、好逸恶劳、个人至上等。社会思潮的负面影响、不能理性地面对价值冲突和他们的成长环境是形成这些取向的主要原因。针对这些原因，有必要对当前的大学生进行“八荣八耻”的价值观教育、生命价值观教育，此外学会用辩证思维的方式面对多元价值冲突和进行抗挫折教育也是必要的。     

基于DFT的MC-CDMA系统信道估计算法

基于导频辅助的最小平方(LS)算法是MC-CDMA中常用的信道估计算法,它运算量低,实现简单,但信道估计精度差。该文讨论了MC-CDMA的导频插入方式,提出一种基于离散傅里叶变换(DFT)的信道估计算法。该算法将LS信道估计循环前缀长度外的时域响应值置零,并设定阈值忽略循环长度内的噪声和无效径响应。该算法保留了LS算法运算量小和实现简单的优点,大大降低了噪声对信道估计精度的影响,仿真结果验证了算法的有效性。     

Bayesian inference and model comparison for asymmetric smooth transition heteroskedastic models

Inference, quantile forecasting and model comparison for an asymmetric double smooth transition heteroskedastic model is investigated. A Bayesian framework in employed and an adaptive Markov chain Monte Carlo scheme is designed. A mixture prior is proposed that alleviates the usual identifiability problem as the speed of transition parameter tends to zero, and an informative prior for this parameter is suggested, that allows for reliable inference and a proper posterior, despite the non-integrability of the likelihood function. A formal Bayesian posterior model comparison procedure is employed to compare the proposed model with its two limiting cases: the double threshold GARCH and symmetric ARX GARCH models. The proposed methods are illustrated using both simulated and international stock market return series. Some illustrations of the advantages of an adaptive sampling scheme for these models are also provided. Finally, Bayesian forecasting methods are employed in a Value-at-Risk study of the international return series. The results generally favour the proposed smooth transition model and highlight explosive and smooth nonlinear behaviour in financial markets.     

浅议海南古代的几次移民

本文阐述海南古代几次移民史实及其对海南古代经济文化发展的重要影响。     

A case-based distance method for screening in multiple-criteria decision aid

Screening is a process of multiple-criteria decision aid (MCDA) in which a large set of alternatives is reduced to a smaller set that most likely contains the best choice. We propose screening using a distance model calibrated on the basis of the decision-maker's own judgement. Viewing MCDA as preference aggregation based on consequence data, we define consequence and preference expressions (values and weights) and describe how they are aggregated. Then we define screening and explain some of its properties. Using an appropriate definition of distance, our case-based distance method screens a set of alternatives using criterion weights and a distance threshold obtained by quadratic optimization using the decision-maker's selection of alternatives from a test set. This case-based method can elicit the decision maker's preferences more expeditiously and accurately than direct inquiry. An application in water supply planning is used to demonstrate the procedure.     

企业文化构建中的"两点论"——对绍兴餐饮文化建设的反思

对企业文化建设,既要重视,又要有科学的方法.绍兴餐饮业作了有益尝试,他们在打造诚信、人本、品牌、创新四大经营理念时,从剖析餐饮业及各企业特有的经营关系,运用"两点论",把四大经营理念分别应用到对立统一的各种层面中,取得双赢效果,推动了经营矛盾的解决,拓展了四大经营理念的应用空间.文章在调查了绍兴十家中型宾馆、饭店基础上,对此进行梳理.     

“唯识”与“唯了别”辨析

在《唯识三十颂》的四个译本中vijāna与vijapti及vijaptimātratā的语义与义理有各不相同的内涵，以“唯识”迻译vijaptimātratā，并非玄奘未经考虑的做法，即使以安慧《三十唯识释》（或译《唯识三十论》）来看，也难说就是“误译”，更谈不上由此“误译”而引来的研究唯识的千年“误区”。     

Dynamic Pricing to Minimize Maximum Regret

We consider a dynamic pricing problem that involves selling a given inventory of a single product over a short, two‐period selling season. There is insufficient time to replenish inventory during this season, hence sales are made entirely from inventory. The demand for the product is a stochastic, nonincreasing function of price. We assume interval uncertainty for demand, that is, knowledge of upper and lower bounds but not a probability distribution, with no correlation between the two periods. We minimize the maximum total regret over the two periods that results from the pricing decisions. We consider a dynamic model where the decision maker chooses the price for each period contingent on the remaining inventory at the beginning of the period, and a static model where the decision maker chooses the prices for both periods at the beginning of the first period. Both models can be solved by a polynomial time algorithm that solves systems of linear inequalities. Our computational study demonstrates that the prices generated by both our models are insensitive to errors in estimating the demand intervals. Our dynamic model outperforms our static model and two classical approaches that do not use demand probability distributions, when evaluated by maximum regret, average relative regret, variability, and risk measures. Further, our dynamic model generates a total expected revenue which closely approximates that of a maximum expected revenue approach which requires demand probability distributions.     

公共需求的传递和满足机制研究

政府职能的实现过程就是政府满足公共需求的过程。在公共需求的传递和满足过程中,公共需求由公众传递给其在议会的代理人——议员,再传递给政府,最后由政府以提供公共产品的形式予以满足。但在这一过程中,由于公众、议员(议会)、政府(官僚)所拥有的利益目标不完全相同,而各方都寻求其自身利益的最大化,在这种多重委托——代理关系下,造成公共需求在传递和满足过程中受到扭曲。其中,同质性公共需求与异质性公共需求在传递和满足过程中所受扭曲程度及影响因素各有不同。