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We characterize the optimal value function as the viscosity solution of the associated Hamilton-Jacobi-Bellman equation and we prove that there exists an optimal barrier strategy which is optimal among all admissible dividend strategy in some special cases.

通过HJB方程的粘性解理论来刻画最优值函数，并证明了一些特殊情形下界策略在所有可允许的分红策略中是最优的。

JNLWD has recently asked the company building the gas canister, General Dynamics, to develop methodologies to characterize the aerosols it generates, and to calculate the ground area coverage of gas clouds created by an airburst at different altitudes.

JNLWD 最近让某家公司来建立气体滤毒罐和常规动力学，来改善产生气溶胶的品质，计算在不同海拔下炸弹空爆产生的气体云雾笼罩的不同区域范围。

A generalized mathematical model was developed to describe the distribution of over-potential.Dimensionless variables μ and ω that characterize the polarization and influence of side electrode reaction in the system,were derived from modeling.Adomian's decomposition methodADM）was used to solve the nonlinear differential equation of the model to obtain an approximate analytical solution,which was in the form of algebraic expressions of infinite power series.By the solution,the relationship between over-potential distribution and average selectivity could be easily calculated without solving the nonlinear model time and again.

建立了描述超电势分布的普遍化数学模型，归纳出表征电极极化和副反应影响的量纲1数μ和ω，并用ADM（Adomian's decomposition method）对该非线性微分方程模型求解；所获得的逼近解代数表达式，可方便地计算不同参数下超电势分布对平均选择性的影响，而毋需反复求解模型微分方程。

Representation Theory and Higher Algebraic K-Theory is the first book to present higher algebraic K-theory of orders and group rings as well as characterize higher algebraic K-theory as Mackey functors that lead to equivariant higher algebraic K-theory and their relative generalizations.

代表理论和更高的代数学的K 理论是第一个书提出订货和组戒指的更高的代数学的K 理论，好和导致equivariant更高的代数学的K 理论和他们的有关的概括的麦基functors一样表现更高的代数学的K 的特性理论。

As we know, the algebraic sum of Hammett constants for thesubstituted donor and acceptor groups can be used to characterize the asymmetryin simple π-organic systems, to correlate the variation of NLO properties.

推拉多烯对取代基比较敏感，易于观察到结构上的变化，是一种很好的研究对象，对推拉多烯的量化计算研究可以给我们提供分子结构和非线性光学等性能之间的关系。

We are now entering the second decade of what will be an even more markedly American century; in fact, the Americanization of the world will characterize the foreseeable future far more than the past.

我们现在进入什么将是一个更加明显的美国世纪第二个十年，实际上，世界的美国化的特点可预见的未来比过去更。

Within the closed loop of the andesite line are most of the deep troughs, submerged volcanic mountains, and oceanic volcanic islands that characterize the Pacific basin.

安山岩线是太平洋地貌中最重要的分界线，将中部太平洋盆地较深层的火成镁铁岩及大陆边沿的半沉降火成长英岩分隔开来。

The hot-wire anemometry was also used to characterize the air flow patterns that were generated by high and low swirl port in a cylinder of a steady-flow rig. Some important phenomena of air flow in the simulative cylinder were found.

借助于热线风速仪研究了两种不同的螺旋进气道在稳流气道试验台的模拟气缸中产生的流场结构，发现了一些重要的现象。

To characterize the distribution of blood pressure, prevalence, and risk factors for hypertension in pediatric chronic kidney disease, we conducted a cross-sectional analysis of baseline BPs in 432 children (mean age 11 years; 60% male; mean glomerular filtration rate 44 mL/min per 1.73 m2) enrolled in the Chronic Kidney Disease in Children cohort study. BPs were obtained using an aneroid sphygmomanometer.

为了描绘血压的分布，流行和引儿童慢性肾功能不全引起的高血压的危险因子，我们对432名患有慢性肾功能不全的儿童的血压进行了一项有代表性的配伍研究（平均年龄为11岁，60%为男性，平均肾小球滤过率为44ml/min1.73m2）血压的测量是利用无水银血压计进行的，而肾小球滤过率则是根据碘海醇的清除率来测定。

Aniline point is used to characterize pure hydrocarbons and to indicate the aromatic content of hydrocarbon mixtures.

苯胺点用来表现纯净的碳氢化合物的特性并用于显示烃类混合物里的芳烃含量。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。