射频原油含水监控系统在原油交接计量站的应用

为了解决饶任输油线原油交接计量中含水超标控制的问题．华北油田公司第三采油厂在原油交接计量站应用射频原油含水监控系统,对原油含水变化进行在线连续监控,实现原油含水超标报警,做到含水超标发现早,控制早,避免了原油交接中的计量纠纷。     

取样方法对测定管输原油含水率的影响

从理论上建立和分析管输原油实际含水率与采样获取的含水率的数学模型，通过不同的采样方式对数学模型进行验证。从理论和实践两个方面对流量比例样和时间比例样进行了对比，指出流量比例样的含水率更接近实际含水率。     

从槐米中提取芦丁的研究

通过实验对从槐米中提取芦丁的工艺进行了研究，得到了较佳的提取工艺条件：槐米粉碎，加入5倍量的水，用石灰水调pH值至8－9，加入3％的硼砂，抽滤。反复提取3次。滤液用稀盐酸调pH值至2－3，静置6h，析出沉淀，过滤，滤渣干燥，即得粗芦丁。将粗芦丁进行精制可得精制芦丁，纯度可达99％以上。     

Stochastic orders in dynamic reinsurance markets

We consider a dynamic reinsurance market, where the traded risk process is driven by a compound Poisson process and where claim amounts are unbounded. These markets are known to be incomplete, and there are typically infinitely many martingale measures. In this case, no-arbitrage pricing theory can typically only provide wide bounds on prices of reinsurance claims. Optimal martingale measures such as the minimal martingale measure and the minimal entropy martingale measure are determined, and some comparison results for prices under different martingale measures are provided. This leads to a simple stochastic ordering result for the optimal martingale measures. Moreover, these optimal martingale measures are compared with other martingale measures that have been suggested in the literature on dynamic reinsurance markets.Received: March 2004, Mathematics Subject Classification (2000): 62P05, 60J75, 60G44JEL Classification: G10     

电火花加工在模具制造中的应用

文章介绍了电火花成型加工、电火花线切割加工的工艺原理、加工特点,通过对电火花加工原理和加工特点的介绍,进而介绍了电火花加工在模具制造中广泛应用。     

东源村集体林地产权安排的案例研究

本文运用社区资源权力、活动与收益分析方法,在对东源村集体林地产权形式演变过程和存在问题进行详尽调查的基础上,深入剖析了该村产权变化的动因及问题产生的深层原因,对深化林业产权制度改革具有借鉴意义。     

从四川花卉业现状论旅游市场的再开发

阐述了四川花卉旅游资源及开发现状，结合周边旅游环境，指出了花卉业对旅游市场开发的潜在价值；提出了具体的开发对策。     

鲜食玉米籽粒产品加工工艺与设备选择

采用国际先进的剥皮、削腐、切粒、清洗、人工挑选籽粒新工艺,完善鲜食玉米籽粒产品的加工,保持籽粒色、形及细菌含量的加工。     

世界性减税趋势对我国税制改革的启示

本文分析了2008年以来世界性减税趋势的经济背景,揭示了减税的经济机理,阐述了世界性减税趋势对我国税制改革的启示。     

High-tech Industry Flourish in Heze

Heze is a time-honored city in southwestern Shandong province.
Heze is the largest center in China for the cultivation of the ＂national flower＂ peony, after which the Mudan District was named. Over 30 percent of its national income comes from the sale of peony.