For the current use of the Siamese network to detect new buildings, simple channel merging cannot effectively highlight the changing characteristics of the image. This research proposes a network combined with pyramid difference feature extraction. The feature map extracted by the Siamese network is differentiated to highlight the changing features, and the Siamese network uses depth wise separable convolution to reduce the amount of network parameters. In the deepest part of the encoding layer, the dilated convolution of different receptive fields is used to extract multi-scale features. The data-dependent up-sampling method is used in the decoding stage to reduce the loss of image information. Experiments with the building dataset of Wuhan university show that the proposed network can effectively suppress noise interference and solve the problem of rough boundaries when extracting the increasing areas of buildings. Compared with the classic change detection network, higher accuracy can be obtained. The accuracy, the recall rate, the F1 score and the overall accuracy are 91.33%,88.31%,89.79% and 96.64%,respectively.

直播销售农产品是一种很好的销售方式,但是在实施的过程中存在着一些问题,这些问题制约了直播卖货的推进,也给直播卖货带来一定的隐患.本文从注重品牌自身营销效果、确立监管体系,保护消费者的利益、吸收直播带货人才,加强直播团队建设三个方面并给出相应的解决措施.

美国高校参与产学研合作的模式多种多样,积累了丰富的推动产学研合作创新的基本经验.其科研实力及其参与产学研合作的水平领先世界,对美国经济的发展起到了重要的推动作用.我国高校亦应从中汲取经验,明确办学定位,狠抓优势学科,提升自身科技研发实力,积极参与产学研合作创新,并探索参与产学研合作的新模式.

新制度经济学是西方经济学界主要流派之一,也是我国经济学家重点研究的方向.产学研合作与新制度经济学之间存在可以借鉴的理论关系.文章运用新制度经济学的理论方法分析产学研合作创新,探索影响产学研合作创新的影响因素,同时强调加强产学研合作创新制度建设的重要性.

科技信息平台建设能有力促进产业融合,进一步促进和优化传统产业,发展现代产业.各地政府在科技信息平台建设过程中要立足于中小企业,政府政策向中小企业倾斜,完善中小企业信息化服务体系;要结合地方特色,利用科技信息推动地方优势与产业发展相结合;要立足于农村,促进科技信息与农业产业相融合.

The Forming of unique Teaching-Style is a sign to dis-tinguish educationalist from teachers and it is also an important condition to improve education quality of a university. To develop individualized teaching style, a university mathematic teacher must learn advantages from others, think independently and sublimate what he gets from teaching to theory. The characteristics of mathematical course and educational theory must be considered.

多媒体技术已被广泛应用于教学中，提高了教学的质量与效率，但还存在许多不足。重点探讨在高等数学教学中应用多媒体技术存在的问题，并结合教育学、心理学等方面的专业知识提出相应的解决措施。

本文讨论了线性代数教学中科学计算能力培养的重要性，指出了目前线性代数课程教学的不足，并结合实际教学分析了利用MATLAB软件解决线性代数教学中复杂计算的可行性与优势。

本文引入了广义Banach框架的概念,研究了该框架所对应的框架算子的特点,利用框架算子给出了一个广义Banach框架判定的充要条件.并且对该框架稳定性进行了研究,推广了Hilbert空间中的广义框架与可测空间上定义的(Ω,μ)框架稳定性的有关结论.

创新能力是当代医学生的必备素质之一,数学课程是培养学生创造性思维的最合适的学科之一.通过数学兴趣教学激发医学生的创新思维,联系医学实践问题培养医学生的创新意识,巧妙运用图形演示挖掘医学生的创新潜能,解决疑难问题提升医学生的创新能力,可以最大限度调动医学生创造性地解决问题,为胜任未来的医学工作夯实基础.

Objective:To study the dual of Banach frame,P-frame and Xd frame. Methods; we consider Xd a BK space that have the canonical unit vectors as a basis and define a Banach space with norm Xd=Zd⊕Yd by dividing the indices N into two sets. Results:There exists an Xd Bessel sequence {fi}∈X such that ∑cifi is conjective and ∑gi(f)fi, besides we can get a better results when {gi}X* is a p-frame.. Conclution:The dual theory of frame in a Hilbert can be generalized to a Banach space,and we can get the construction of an elements in a Banach space and its dual space.