低β尘埃等离子体中的非线性尘埃-动力学阿尔芬波

研究低β尘埃等离子体中的尘埃－动力学阿尔芬孤立波，采用Ｓａｇｄｅｅｖ势方法，在小振幅极限下，对局域尘埃－动力学阿尔芬波进行了解析和数值研究，结果表明：在等离子体中可以形成密度坑及密度隆起结构，并且随着尘埃含量的增加，密度坑得以加深，而密度隆起幅度增大。     

扇形孔破岩机理的全息动光弹研究

采用全息动光弹试验手段 ,对扇形孔破岩的机理进行了理论研究 ,其结论对现场扇形孔爆破设计具有指导意义。     

海面小目标检测的AR双极点分析

针对舰载(或岸基)雷达对海面小目标检测问题,尤其对较短时间内完成检测的应用场合,基于自回归(AR)模型的解决方案,对其中具有代表性的算法———最大幅度极点法(ARLPM)的不足进行了详细分析,提出同时利用次大幅度极点信息的AR双极点分析法。给出了应用该方法的具体步骤,雷达数据检测结果证明该方法优于ARLPM法。     

环渤海区域经济腾飞的战略选择——北方大型港群建设刍议

分析了环渤海在区域经济发展中的战略地位，而北方大型港群的建设是实现其战略地位的前提和保证．在对滦河三角洲沿岸大型港址群进行评价的基础上，提出分散组团式港群建设的设想．     

电力谐波的分类、危害及其治理

分析电力谐波的分类及谐波给电力系统及电气设备带来的日益严重的危害,简介谐波治理的一些措施。     

A semi-analytical model for the propagation of Rossby waves in slowly varying flow

Instead of using complicated general circulation models (GCMs), a simple semi-analytical model based on ray theory has been used to study energy evolution and ray path of Rossby waves in slowly varying mean flows. Our model yields similar results to those calculated from barotropic models, and also provides a chance to study Rossby waves in the slowly varying flows with both vertical and meridional shears. The model results show that upward Rossby waves can only grow in westerlies, and decay when further ascend. The baroclinic Rossky waves are restrained by the β effect in lower latitude. In the westerly jet with meridional and vertical shears, the barotropic Rossby waves originated from south of the westerly jet, and these can grow while propagating upper-northward. The baroclinic Rossby waves originated from north of the westerly jet and can grow while propagating upward and southward. Such a semi-analytical model provides a simple forecasting tool to allow study of the local weather anomalies to the heating/topography forcing associated with the global warming.     

A three-dimensional diffusion equation of suspended sediment by waves and currents

Based on the law of mass conservation, a general three-dimensional diffusion equation of suspended sediment due to waves and currents, adaptable to estuarial and coastal areas, is derived by decomposing the instantaneous velocities and concentrations into three-different-time-scale components respectively. A three-dimensional suspended sediment diffusion equation adaptable to actual calculations is available as the result of the parameterizations of turbulent diffusion term and wave diffusion term. Different from the former diffusion equations, the influence of waves and currents on suspended sediment diffusion can be simultaneously reflected in the newly derived equation.     

非线性弹性杆中的速度孤立子波

采用减缩摄动方法（Ｒｅｄｕｃｔｉｖｅ ｐｅｒｔｕｒｂａｔｉｏｎ ｍｅｔｈｏｄ） ， 通过建立非线性弹性杆纵向振动的非线性双曲型方程组， 在远场渐近意义上和小振幅情况下， 证明了非线性弹性杆中速度孤立子波的存在性，并讨论了孤立子波的传播性质     

Characteristic-knowledge-aided spectral detection of high frequency first-order sea echo

To detect high frequency (HF) first-order sea echo spectra contaminated with ships, ionosphere interference, and other, a new characteristic-knowledge-aided detection method is proposed. With 2-D image features in range-Doppler spectrum, the trend of first-order sea echoes is extracted as indicative information by a multi-scale filter. Detection rules for both single and splitting first-order sea echoes are given based on the characteristic knowledge combining the indicative information with the global characteristics such as amplitude, symmetry, continuity,etc. Compared with the classical algorithms, the proposed method can detect and locate the first-order sea echo in the HF band more accurately especially in the environment with targets/clutters smearing. Experiments with real data verify the validity of the algorithm.