It is important to alter up - to - down extension concept in agricultural industrialization , so that will enhance farmers " ability to absorb science and technology , channeled them towards self - decision - making on the basis of respecting their desire 发展农业产业化经营，要彻底改变自上而下的推广观念，在尊重农民意愿的基础上，引导农民提高自我决策能力。建立一个高效灵活、多渠道、多形式的技术信息传播网络。
Up to now , relationship between two sides of the strait has formed a new multi - level and multi - form economy and trade relationship pattern , which includes indirect tra ' de , indirect investment , finance communion , technology corporation , service corporation , and human resource communion and soon 迄今为止，海峡两岸经贸关系已经形成了包括间接贸易、间接投资、金融交流、技术合作、劳务合作、人才交流等多层次、多形式的经贸关系格局。
For concrete structure in the practical engineering , the non - mechanics damages , such as alkali - aggregate reaction , sulfate attack , carbonization , steel rust , freeze and thaw , and so on , are unavoidable due to the exist of erosive media . the deterioration form of mono or multi - factor influences on the concrete property of construction and durability greatly , and shortens the service life of the concrete to a large extent . permeability of concrete is the most important factor for these non - mechanics damages , so the permeability test of concrete is the normal and required item to study the durability of concrete 实际工程中的混凝土结构，因侵蚀性介质的存在而使非力学破坏行为无处不在，这些非力学破坏行为包括碱集料反应、硫酸盐侵蚀、碳化、钢筋锈蚀、冻融等，单一的破坏形式或多形式的复合破坏作用对混凝土结构性能及耐久性能均有着较为严重的影响，在很大程度上缩短了建筑物的服役年限，而这些非力学破坏在很大程度上取决于其渗透性，所以测试混凝土渗透性能是研究判断混凝土耐久性的常规必测项目。
Different from the traditional education , the distance education can enlarge and share the educational resources to satisfy the students " multiple requirements . due to lack of the educational resources , it will become an important way to develop the higher education . so in this paper it is very significant to make a study and analyze the theory and practice of the dhe 以电子信息技术为基础的远程高等教育以其不同与传统高等教育的特征，为进一步拓展教育资源，实现资源共享，打破办学层次的单一局面，为满足学习者的多层次、多规格、多形式的学习要求，提供了广阔的发展空间，成为我国在教育资源短缺的情况下大力发展高等教育的主要手段和措施。
In the past decade , the private education in putian has been developed quickly under the guidance of the policy - to encourage positively , to support energetically , to guide correctly and to strengthen management . private schools of many levels , sorts and forms have appeared , which is encouraging . but still there are many worrying problems existing , such as problems of environment and management 十几年来，在“积极鼓励、大力支持、正确引导、加强管理”的方针指导和莆田市政府的扶持下，通过办学者的共同努力，莆田市民办教育得到了较快的发展，初步形成了多层次、多门类、多形式的办学格局，令人鼓舞，但民办教育发展中依然存在着外部环境和内部管理等诸多问题，令人忧虑。
By using the solutions of a new auxiliary elliptic equation , a direct algebraic method is proposed to construct the exact solutions of some nonlinear evolution equations . the main difference between this method and previous auxiliary elliptic equation methods is that the balance order becomes smaller after using the new auxiliary elliptic equation . therefore , the derived algebraic equations are greatly simplified . meanwhile , the obtained new solutions contain more parameters to be chosen . for some special cases , they give the previous known solutions . it is shown that some new exact periodic solutions of some nonlinear evolution equations are explicitly obtained with the aid of symbolic computation 利用一个新的辅助椭圆方程将求解非线性发展方程精确解的问题转化为一个代数方程组进行求解,与已有的辅助椭圆方程法的主要不同是,应用这一新的辅助椭圆方程后降低了平衡次数,减少了所得的代数方程组的个数和方程的项数,从而大大地简化了代数方程组的求解.同时,由于辅助椭圆方程的解中包含了更多的可选参数,从而给出了非线性发展方程的更多形式的解.作为应用,借助于计算机的符号计算,求得了一些非线性发展方程的新的精确周期解
