一种优化控制变风量空调系统的新方法

采用状态反馈解耦和遗传算法优化控制器相结合的方法提高变风量(VAV)空调系统中室内温度回路的控制精度和品质.采用状态反馈解耦以解除送风温度控制回路与室内温度控制回路之间的耦合,随后采用逆推法找到闭环控制系统特性方程的根与控制器参数的关系,再用遗传算法优化设计控制器的参数.实验结果表明,这些措施有效地提高了VAV空调系统中室内温度回路的控制精度和品质.     

A Case Study: Distribution of Bacterial and Fungal Aerosols in Air-Conditioning Systems in Shaanxi History Museum

In order to investigate the bacteria and fungi aerosol characteristic distribution in HVAC-system and its components at Shaanxi History Museum.Measurements were performed to probe the bacteria and fungi aerosol in HVAC systems,located at Xi'an city,China.The results showed that there was fungi growth inside the ventilation ducts,fungi contamination was worse than bacteria,and both of them were distributed into occu-pied space with the air supply ducts.The dominating genera of fungi was found to be Penicillium spp. and As-Pergillus spp.,which was respectively 46.1%and 20.7% in settling fungi, and the dominating genera of fungi in dust were Cladosporium spp.and Penicillium spp., which was 41.8%and 30.1%respectively.It suggests that available measures to improve and control the performance of HVAC-systems such as the maintenance,management and cleaning should be taken to prevent this pollution and to develop strategies to keep this pollution away.     

用太阳能再生的除湿冷却空调系统的构思

本文提出了一种用液体除湿制冷的太阳能空调系统的设想 .其最大特点是利用吸湿剂溶液代替冷冻水处理空气 ,取消了制冷装置 ,因而可在较低的集热温度下运行 ,其辅助加热方式可使系统在使用辅助热源时高效率地工作     

空气热湿处理的不可逆热力学分析及Le研究

对空调中典型工况下空气处理过程进行了不可逆热动力学分析；在此基础上，建立能反映实际传递不可逆热动力学５的理论模型；利用实验测出的空气和水膜温度沿板长方向的分布，导出基本方程组中所需的状态参数和相关热力参数，通过对理论模型的数值积分，得到Ｌｅｗｉｓ数取值在０．１－１．５范围内对热湿交换过程计算精度的影响。     

融合序列语法知识的卷积-自注意力生成式摘要方法

针对基于编码-解码的生成式摘要模型不能充分提取语法知识导致摘要出现不符合语法规则的问题，循环神经网络易遗忘历史信息且训练时无法并行计算导致处理长文本时生成的摘要主旨不显著以及编码速度慢的问题，提出了一种融合序列语法知识的卷积-自注意力生成式摘要方法.该方法对文本构建短语结构树，将语法知识序列化并嵌入到编码器中，使编码时能充分利用语法信息；使用卷积-自注意力模型替换循环神经网络进行编码，更好学习文本的全局和局部信息.在CNN/Daily Mail语料上进行实验，结果表明提出的方法优于当前先进方法，生成的摘要更符合语法规则、主旨更显著且模型的编码速度更快.      

Evaporative Condensers in Comfortable Air Conditioning System

The operating theory of an evaporative condenser was expatiated.The difference between an e-vaporative condensing refrigeration system and a general refrigeration system was analyzed.Compared with the air-cooled and the water-cooled,the virtues of energy-conservation and water-conservation of evaporative con-densers were analyzed.Some questions existing in the application of evaporative condensers were pointed out,the corresponding solving methods were analyzed accordingly,and the development trend of evaporative con-densing technique in mechanical refrigeration system field and the applied foreground of evaporative condensers in comfortable air conditioning were prospected.