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关于U形管式换热器流阻对压力场影响的分析
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作者 梁雪娇 韩文娟 +1 位作者 彭义敏 杨丹丹 《应用物理》 CAS 2021年第3期178-185,共8页
本文对U形管式换热器流阻对压力场的影响进行分析。研究方法是:先对换热器的流阻知识进行介绍,再对U形管式换热器的压力场进行模拟,使用换热器的流阻理论对所模拟的压力场进行分析。研究结论:U形管式换热器管程越长、流体入口流速越大... 本文对U形管式换热器流阻对压力场的影响进行分析。研究方法是:先对换热器的流阻知识进行介绍,再对U形管式换热器的压力场进行模拟,使用换热器的流阻理论对所模拟的压力场进行分析。研究结论:U形管式换热器管程越长、流体入口流速越大、管径越小,进出口压降越大。通过模拟分析,为U形管式换热器的优化设计提供一些参考信息。 展开更多
关键词 U形管式换热器 流阻 压力场 数值模拟 研究
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Physiological Response and Resistance of Plants to Disease and Pest Stress
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作者 Cong CHEN Xiaoxia CAI +4 位作者 yimin peng Lingling LIU Zilei LIANG Guangzu DU Yanjun GUO 《Plant Diseases and Pests》 2024年第4期1-6,12,共7页
This paper outlines the physiological responses of plants to pathogenic microbial infection and pest feeding stress,as well as the resistance characteristics of plants to diseases and pests,and proposes new directions... This paper outlines the physiological responses of plants to pathogenic microbial infection and pest feeding stress,as well as the resistance characteristics of plants to diseases and pests,and proposes new directions for future research on crop resistance to diseases and pests.The objective of this paper is to provide a reference framework for the breeding of crops with enhanced resistance to diseases and pests,the utilization of natural immunity in crops,and the efficient prevention and control of diseases and pests.This framework is intended to facilitate the healthy and sustainable development of the agricultural industry. 展开更多
关键词 Pathogenic microorganism PEST Disease resistance Pest resistance Resistance breeding Defensive response
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