结合全局与局部信息的主动轮廓分割模型

针对传统的基于区域的主动轮廓模型在分割灰度不均匀图像和噪声图像存在效果不佳的问题,提出结合全局项与局部项的主动轮廓分割模型。全局项由CV(Chan-Vese)模型的保真项构成,局部项的构建考虑局部区域信息的同时引入反映图像灰度特性的局部熵信息。依据图像灰度的特点,选择合理的全局项和局部项参数,并加入正则项保证曲线在演化过程中保持平滑,保障分割结果的可靠性。通过变分水平集方法最小化能量泛函,依据梯度下降流迭代更新水平集,完成曲线演化。采用模拟图像和实际图像进行实验分析,结果表明,所提出的结合全局项和局部项的主动轮廓模型可以高效地分割噪声严重以及灰度分布不均匀的图像。     

一种分析噪声背景下目标特征有效性的方法

本文根据目标特征和噪声分布,在一定假设条件下推出了最小错误率（Ｂａｙｅｓ错误率）的表达式,从而把特征分布、噪声大小直接与分类的最小错误率联系起来,给出了一种分析噪声背景下目标特征的有效性的方法。文中利用这种方法对目标和诱饵的红外辐射特征的有效性进行了分析     

基于改进局部投影算法的非线性时间序列降噪

改进了非线性时间序列降噪的局部投影算法,并应用此算法对含噪Lorenz混沌信号进行降噪,将其与小波分析降噪效果进行比较,实验结果表明:改进的局部投影算法对非线性信号降噪效果十分明显。     

科学制定发展规划 彰显地方高校职能

地方高校制定发展规划是适应国内外高等教育发展的客观需求，是区域经济社会发展的必要需求，是高校自身发展的迫切需求。地方高校要履行高校职能，更好地为地方经济社会发展服务就必须科学制定规划，特别是要战略规划学校的办学定位、特色和目标。同时，规划的实施要强调监控并要与高校职能协调统一。     

Counterinsurgency Challenge in Post-2001 Afghanistan

Although the Taliban insurgency was internally divided and unable to coordinate its activities in 2014–2015, the Afghan security forces were not able to contain it and steadily lost ground throughout 2015. Until 2015, there had been little effort to develop an indigenous Afghan counterinsurgency strategy, but a sense of urgency emerged after a string of Taliban victories. At the beginning of 2016, it was still not clear if and when the National Unity Government would be able to produce a counterinsurgency strategy and, in any case, the need for a coherent counterinsurgency approach became questionable as the Taliban appeared to be transitioning towards conventional warfare.     

Too much Western bias? The need for a more culturally adaptable approach to post-conflict security sector reform

The existing guidelines for security sector reform (SSR) tend to draw on theoretical work in the field of civil–military relations, which in turn has been derived from Western, liberal democratic models of governance. Although guidelines strongly advise that local culture and context need to be considered when drawing up objectives for post-conflict SSR programmes, this is not often reflected in practice. This article considers some of the reasons for this, citing both in-country challenges and donor-related issues, and suggests that one of the biggest problems is a lack of alternative, non-orthodox models of civil–military relations to draw upon. It is further suggested that elements of suitable alternative models may be found in states which possess political structures not entirely dissimilar to the Western, liberal democratic ideal, but which can offer different perspectives. Detailed research of these structures should produce a pool of sub-models which could then be employed to create bespoke, culturally appropriate objectives for use in post-conflict SSR programmes.     

Security sector reform in Africa: Donor approaches versus local needs

Many African states have security sector reform (SSR) programs. These are often internationally funded. But how do such programs account for previously existing security institutions and the security needs of local communities? This article examines SSR all over Africa to assess local ownership and path dependency from a New Institutionalist perspective. It finds that SSR, particularly in post-conflict countries, tends to be driven by ideas and perceptions of international donors promoting generalized blueprints. Often, such programs only account in a very limited way for path-dependent aspects of security institutions or the local context. Hence, the reforms often lack local participation and are thus not accepted by the local community eventually.     

求解CVRP问题的一种改进启发式蚁群算法

针对蚁群算法求解CVRP问题时收敛速度慢、求解质量不高的缺点,提出了一种改进启发式蚁群算法。该算法借鉴蚁群系统和基于排列的蚂蚁系统的优点设计信息素更新策略,既加强了对每次迭代最好解的利用,又避免了陷入局部最优;按一定比例使用基本方法和基于PFIH方法构造路径,扩大了算法的搜索空间;采用一种混合局部搜索算子,增强了算法局部寻优能力。实验结果表明,改进启发式蚁群算法可以大幅度减少车辆运行成本,具有较快的收敛速度。     

基于数据链的航空作战进程研究

研究了数据链支持下的航空作战兵力变化问题。将空战能力指数通过映射关系转化为平均战斗力水平,从数学理论上证明了二者具有等价性。结合平均战斗力水平,建立了基于数据链的改进蓝彻斯特空战模型及具有增援力量的作战模型。仿真分析了等效实力比、不同初始值以及增援时刻的不同对空战进程的影响,结果表明数据链具有提高作战效能和改变战局的作用。实验发现了在增援作战时,存在"局部最优增援时刻点"这一重要结论。     

试论大学英语翻译教学中本土文化的引入——以兵团文化为例

文化交流可以促进相互了解、共同繁荣。文化没有优劣之分,因此,文化交流应该是平衡的。这种交流离不开翻译。翻译教学是培养翻译人才的主要手段。教材是教学三要素之一,其重要性自不待言。我们目前的翻译教材在很大程度上仍然偏重文学,忽略实用文体的翻译,而且不可能顾及各地文化,因此在利用现有的翻译教材进行翻译教学时,有必要增加本地文化的翻译内容。兵团文化是一种崭新、独特的文化,更有必要在翻译教学中占有一席之地。