理想声源辐射声场的数值分析

通过声场的特性和规律分析可以识别和定位噪声源,对噪声控制以及声源的设计提供参考。数值方法是求解有源声场的重要工具,复杂的声辐射一般可分解为简单的声辐射叠加。研究了单极子、偶极子、活塞等几种理想声源辐射声场的解析解,并用有限元法计算数值解,得到相应的辐射声场,包括声压、速度、指向性等量,有限元法得到的数值结果与解析解吻合;利用有限元法计算了点声源的线性阵列与平面阵列等典型的叠加声场。对各种声源的特性和辐射声场的规律以及在工程领域中的应用进行了归纳。国家自然科学基金项目(51505261);;山东省自然科学基金项目(ZR2015AM013

The Social Status of the Female in China and Its Influence Factors

女性对自身社会地位的主观评估主要取决于对自我能力的认可程度、母亲和自己的受教育水平、以及所居住区域的性别文化性质。对自己的能力树立信心是女性社会地位提高的一个与心理或性格相关联的先决条件,而教育投入则是提升女性社会地位一块不可或缺的重要基石。大男子区域文化不仅不合理地降低女性的社会地位,而且还让处于不平等社会地位中的女性感到自我满足。要进一步改善我国妇女的社会地位,就必须在注意提高妇女自信的心理素质和自强的教育素质的同时,从社区和社会层面消除以男权为核心的传统性别文化。The subjective self-assessment of the Women mainly depends on self- approval degree of ability, the educational level of themselves and their mothers and the sexual cultural nature of the inhabitant areas It is a precondition related to the psychology and the personality for women to establish their own confidence on their ability in order to raise their social status, while the educational input is the important and indispensable basis in promoting the social status of women The big man regional culture will not merely reduce the social status of women unreasonably, but also make the women who are in the unfair status feel satisfied In order to improve the social status of women in our country, we should dispel the traditional sexual culture with the male power as th core from the aspects community and society while raising the psychological quality and educational qualit