阜新市农村饮水安全问题现状与对策

通过对阜新市自然、社会、经济概况和农村饮水安全现状进行叙述,科学、详细、系统的从自然、社会、经济等方面分析农村饮水不安全类型和原因,提出了科学合理的近、远期目标、制定合理的工程建设标准、因地制宜选择工程建设形式、加强饮用水源保护、采取多渠道筹集资金措施、加强项目实施管理、加强技术培训和新技术推广、加大农村饮水安全宣传力度、采取科学有效的工程建后管理措施等解决饮水安全问题的方法和对策。     

黄河沙坡头水利枢纽泄洪闸叠梁闸门及抓梁的布置和设计

沙坡头水利枢纽是黄河干流上的一个水利控制性工程，对其泄洪闸弧形闸门的运用非常频繁，体现了叠梁检修闸门的维护作用的重要性。合理选用检修闸门及其启闭设备是工程设计的重要的一部分，叙述了叠梁检修闸门的布置情况，并针对泄洪闸坝段的实际情况，重点叙述上、下游叠梁闸门在不同的工况下的不同的设计思路和设计特点，及液压抓梁、机械抓梁选定依据和结构特点。     

Exploration to generate atmospheric pressure glow discharge plasma in air

Atmospheric pressure glow discharge (APGD) plasma in air has high application value.In this paper,the methods of generating APGD plasma in air are discussed,and the characteristics of dielectric barrier discharge (DBD) in non-uniform electric field are studied.It makes sure that APGD in air is formed by DBD in alternating current electric field with using the absorbing electron capacity of electret materials to provide initial electrons and to end the discharge progress.Through designing electric field to form two-dimensional space varying electric field and three-dimensional space varying electric field,the development of electron avalanches in airgap is suppressed effectively and a large space of APGD plasma in air is generated.Further,through combining electrode structures,a large area of APGD plasma in air is generated.On the other hand,by using the method of increasing the density of initial electrons,millimeter-gap glow discharge in atmospheric pressure air is formed,and a maximum gap distance between electrodes is 8 ram.By using the APGD plasma surface treatment device composed of contact electrodes,the surface modification of high polymer materials such as aramid fiber and polyester are studied and good effect of modifications is obtained.The present paper provides references for the researchers of industrial applications of plasma.     

高原高寒地区混凝土冬季施工技术分析与研究

本课题以青海花石峡至久治高速公路10标项目为依托,对高原高寒地区混凝土冬季施工技术进行研究,提出包含配合比确定、外加剂(防冻剂)选用、原材料预热、混凝土运输保温、混凝土浇筑温度控制和保温养护在内的施工技术,旨在为实际施工提供技术参考,保证施工质量。     

Generation of atmospheric pressure diffuse dielectric barrier discharge based on multiple potentials in air

In order to achieve atmospheric pressure diffuse dielectric barrier discharge (DBD) in air, a helical–helical electrode structure with a floating-voltage electrode is proposed in this paper. Results from an electric field distribution simulation indicate that strong electric fields are formed where the helical-contact electrodes’ insulating layers are in contact with each other, as well as near the floating-voltage electrode, which contributes to the production of a large number of seed electrons. The electric field within the air gap is weak (< 3×10⁶ Vm⁻¹), which inhibits the rapid development of electron avalanches and the formation of filament discharge. The experimental result shows that a 3.0 mm width diffuse DBD is generated in air. Moreover, based on the study of the helical–helical electrode with a floating-voltage electrode, a threedimensional electrode structure is presented, and a three-dimensional diffuse discharge is generated in air by adopting this electrode structure. The plasma studied is stable and demonstrates good diffusion characteristics, and therefore has potential applications in the field of exhaust gas treatment and air purification.