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采用选择性催化还原减氮法机外控制船用柴油机的NO_x排放 被引量:3
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作者 朱国强 《航海技术》 北大核心 2003年第1期48-51,共4页
选择性催化还原减氮法(SCR,Selective Catalytic Reduction)是船用柴油机NOx排放的机外控制方法之一.国外几家著名的船用柴油机制造厂商研究、开发、应用此方法已有10多年的历史.实践证明,此方法简易实用,能有效执行IMO"MARPOL 73... 选择性催化还原减氮法(SCR,Selective Catalytic Reduction)是船用柴油机NOx排放的机外控制方法之一.国外几家著名的船用柴油机制造厂商研究、开发、应用此方法已有10多年的历史.实践证明,此方法简易实用,能有效执行IMO"MARPOL 73/78公约"附则Ⅵ,能有效保护内河沿岸、港口和海洋的大气环境. 展开更多
关键词 选择性催化还原减氮法 机外控制 船用柴油 NOX排放
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船用柴油机NO_x排放的机外控制技术发展略述
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作者 朱国强 《交通部上海船舶运输科学研究所学报》 2002年第2期113-119,共7页
关键词 船舶 氮氧化物 排放控制 废气处理 柴油 NOx 机外控制 技术发展
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减少柴油机NO_x排放的机外措施 被引量:8
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作者 周玉明 《柴油机》 2001年第1期19-23,共5页
控制柴油机有害气体排放不外乎采用机内措施和机外措施.本文着重介绍了降低柴油机NOX排放的 SNCR、SCR、NSCR、NSR、SNR等机外措施.
关键词 柴油 排放 机外控制措施 氧化氮
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船舶柴油机排放物控制措施及前景分析 被引量:3
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作者 杨树森 《江苏船舶》 2003年第4期19-21,共3页
随着航运业的不断发展 ,船舶柴油机排放物也已成为日趋严重的污染源。许多国家和地区都在积极采取各种有效措施 ,把限制船舶排放物对大气的污染提到了议事日程上。就各种排放污染物的控制措施作简要分析 ,重点介绍SCR原理、优缺点及应... 随着航运业的不断发展 ,船舶柴油机排放物也已成为日趋严重的污染源。许多国家和地区都在积极采取各种有效措施 ,把限制船舶排放物对大气的污染提到了议事日程上。就各种排放污染物的控制措施作简要分析 ,重点介绍SCR原理、优缺点及应用情况。 展开更多
关键词 船舶 柴油 排放污染物 排放控制 氮氧化物 SCR 控制 机外控制 还原剂 催化剂 大气污染
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船舶柴油机NO_x排放的控制措施
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作者 王晓中 蒋爱国 《科技资讯》 2012年第4期84-84,共1页
MARPOL73/78公约附则Ⅵ——"防止船舶造成大气污染规则"对船舶柴油机氮氧化物(NOx)的排放进行了严格的限制,已有高达全球商船总吨位的81.88%的缔约国通过了该附则及其后续修正案。船舶柴油机的NOx排放控制措施有机内控制和机... MARPOL73/78公约附则Ⅵ——"防止船舶造成大气污染规则"对船舶柴油机氮氧化物(NOx)的排放进行了严格的限制,已有高达全球商船总吨位的81.88%的缔约国通过了该附则及其后续修正案。船舶柴油机的NOx排放控制措施有机内控制和机外控制两种。机内控制包括了气缸直接喷水(DWI)、增压空气加湿等措施。机外控制则是指是在机内控制基础上,为了进一步降低排放量而采取的措施,主要应用的是选择性催化还原技术(SCR)。 展开更多
关键词 氮氧化物 控制 机外控制 DWI SCR
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一种机外照明控制组件专用测试平台的设计
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作者 王庆庆 万启星 +1 位作者 周水娇 漆诚 《中国科技期刊数据库 工业A》 2022年第1期274-277,共4页
机外照明控制组件是飞机机外照明子系统的配套产品,目前,机外照明相关成件集成到机外照明控制组件系统内,采取集中控制的方式,实现编队灯、航行灯和防撞灯在各种工作模式下的实时控制。文章设计的机外照明控制组件专用测试平台以工控机... 机外照明控制组件是飞机机外照明子系统的配套产品,目前,机外照明相关成件集成到机外照明控制组件系统内,采取集中控制的方式,实现编队灯、航行灯和防撞灯在各种工作模式下的实时控制。文章设计的机外照明控制组件专用测试平台以工控机为检测平台,基于成熟的PCI总线技术,通过专用测试软件实现对机外照明控制组件的编队灯、航行灯和防撞灯在友好和隐蔽等多种工作模式下的自动控制,并对测试结果进行自动处理和显示以及判读,最终实现产品的自动测试功能。 展开更多
关键词 照明控制组件 工作模式 自动测试
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汽车排放污染及控制技术
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作者 雷永臣 尹祚为 李满昌 《林业机械与木工设备》 2000年第11期27-28,共2页
关键词 汽车排放污染 污染控制 机外控制 控制
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Suboptimal State Feedback H2/H∞ Controller Design with Spectrum Constraint for Discrete-time Stochastic Systems
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作者 侯婷 张维海 马宏基 《Journal of Measurement Science and Instrumentation》 CAS 2011年第1期67-71,共5页
With the aid of the spectnnn techique, a new concept named-α-stabilizability (0≤α≤1) is intnxhged and its suffident and necessary canditions are also prvposed. Especially, it is identical with the asymptotically... With the aid of the spectnnn techique, a new concept named-α-stabilizability (0≤α≤1) is intnxhged and its suffident and necessary canditions are also prvposed. Especially, it is identical with the asymptotically mean square stabilizability when α = 1. As an application, the suboptimal state feedback H2/H∞ controller that satisfies the additional Spectrum canstmint via solving a convex optimization problem is delt with. 展开更多
关键词 spectrum technique asymptotically mean square stabi lizability α - stabilizability H2/ H∞ oontroller design
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Effect of electroacupuncture on chemotherapy-induced peripheral neuropathy in patients with malignant tumor:a single-blinded,randomized controlled trial 被引量:12
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作者 Zhang Shiqiang Wu Tingting +7 位作者 Zhang Haisheng Yang Yun Jiang Haiyan Cao Shengcheng Xie Fang Xia Xiaoting Lü Junqiang Zhong Yi 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2017年第2期179-184,共6页
OBJECTIVE:To evaluate the effect of electroacupuncture on chemotherapy-induced peripheral neuropathy(CIPN), quality of life and immune status of patients with malignant tumors.METHODS:From Jan, 2013 to May, 2014, 37 p... OBJECTIVE:To evaluate the effect of electroacupuncture on chemotherapy-induced peripheral neuropathy(CIPN), quality of life and immune status of patients with malignant tumors.METHODS:From Jan, 2013 to May, 2014, 37 patients with malignant tumors were included in this prospective single-blinded study, and randomized to receive either electroacupuncture or acupuncture treatment on basis of chemotherapy.The chemotherapy was continued for 2 courses as previous before the treatments, with 21 days as a course of treatment.Patients received acupuncture and electroacupuncture once per day starting at the day before chemotherapy for consecutive 7 days followed by 14 days off, with 21 days as a course of treatment, and continued for two courses of treatment.Then CIPN, traditional Chinese clinical symptoms,quality of life and immune status were all evaluated for each patient prior treatment and after two courses of treatment.RESULTS:The gender, age, cancer species as well as incidence(83.3% vs 84.2%) and grades of CIPN before treatments were all similar in patients receiving acupuncture or electroacupuncture(all P >0.05).After treatments, most patients with peripheral neuropathy were cured by two courses of electroacupuncture(84.2% vs 21.1%), whereas the other group of patients had similar incidences of peripheral neuropathy compared with prior-acupuncture(83.3% vs 72.2%).Besides, patients receiving electroacupuncture had lower incidence of peripheral neuropathy than those receiving acupuncture treatment(χ~2= 9.745, P = 0.002).The grades of peripheral neuropathy were significantly different in the two groups post-treatment(χ~2= 13.983, P =0.007).The total effective rates for traditional Chinese clinical symptoms were 16.7% and 84.2% in acupuncture and electroacupuncture groups, respectively(Z =-4.239, P < 0.001).The electroacupuncture treatment provided a more satisfactory life for patients compared with acupuncture(Z =-4.76, P < 0.001).Both electroacupuncture and acupuncture had no effects on immune function.CONCLUSION:Electroacupuncture could alleviate CIPN, and improve traditional Chinese clinical symptoms and quality of life, but did not affect immune function. 展开更多
关键词 Electroacupuncture Quality of life Chemotherapy-induced peripheral neuropathy Randomized controlled trial
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H_2/H_∞ CONTROL PROBLEMS OF BACKWARD STOCHASTIC SYSTEMS
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作者 ZHANG Qixia 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2014年第5期899-910,共12页
This paper is concerned with the mixed H_2/H_∞ control problem for a new class of stochastic systems with exogenous disturbance signal.The most distinguishing feature,compared with the existing literatures,is that th... This paper is concerned with the mixed H_2/H_∞ control problem for a new class of stochastic systems with exogenous disturbance signal.The most distinguishing feature,compared with the existing literatures,is that the systems are described by linear backward stochastic differential equations(BSDEs).The solution to this problem is obtained completely and explicitly by using an approach which is based primarily on the completion-of-squares technique.Two equivalent expressions for the H_2/H_∞ control are presented.Contrary to forward deterministic and stochastic cases,the solution to the backward stochastic H_2/H_∞ control is no longer feedback of the current state;rather,it is feedback of the entire history of the state. 展开更多
关键词 Backward stochastic differential equations(BSDEs) completion of squares forward backward stochastic differential equations(FBSDEs) H2/H∞ control Riccati equations.
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