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湖北省产学研耦合路径研究 预览
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作者 张静 殷磊夫 《武汉工程职业技术学院学报》 2019年第2期84-87,共4页
科技创新成果形成生产力的关键是促进成果转化为商品,形成产业化。高等院校、科研院所是科技成果的主要诞生地,但是却没有发挥其应有的价值,造成了科研成果的严重堆积;企业受限于没有核心技术作支撑而缺乏竞争力。因此,高等院校、科研... 科技创新成果形成生产力的关键是促进成果转化为商品,形成产业化。高等院校、科研院所是科技成果的主要诞生地,但是却没有发挥其应有的价值,造成了科研成果的严重堆积;企业受限于没有核心技术作支撑而缺乏竞争力。因此,高等院校、科研院所和企业之间的耦合,是实现资源充分流动、推动科技与经济相结合的最直接路径。 展开更多
关键词 产学研 耦合 耦合前提 耦合路径
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事故中的安全信息耦合研究
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作者 罗通元 吴超 《中国安全科学学报》 CAS CSCD 北大核心 2019年第3期155-160,共6页
为探索事故应急及预防研究的新思路和新方法,结合耦合分析理论研究事故中的安全信息传播。首先,从安全信息学层面提出安全信息概念,分析将耦合理论应用于安全信息传播和演化的必要性;然后,基于安全信息的本质规律,界定出事故的安全信息... 为探索事故应急及预防研究的新思路和新方法,结合耦合分析理论研究事故中的安全信息传播。首先,从安全信息学层面提出安全信息概念,分析将耦合理论应用于安全信息传播和演化的必要性;然后,基于安全信息的本质规律,界定出事故的安全信息特有的4条特征;其次,从企业、政府和社会层面阐明影响安全信息的24项基本耦合因子;最后,根据文献及耦合因子建立包含9个关键点和42条路径的事故安全信息耦合作用路径图,并以此为基础构建出安全信息基本耦合模型。结果表明:事故安全信息耦合机制对于安全信息耦合过程及演化模型有指导意义,可为基于安全信息的事故应急与预防提供理论依据。 展开更多
关键词 耦合 安全信息 安全信息传播 事故 耦合因子 基本耦合模型
Differential coupling contributes to synchronization via a capacitor connection between chaotic circuits
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作者 Yu-meng XU Zhao YAO +1 位作者 Aatef HOBINY Jun MA 《信息与电子工程前沿:英文版》 SCIE EI CSCD 2019年第4期571-583,共13页
Nonlinear oscillators and circuits can be coupled to reach synchronization and consensus. The occurrence of complete synchronization means that all oscillators can maintain the same amplitude and phase, and it is ofte... Nonlinear oscillators and circuits can be coupled to reach synchronization and consensus. The occurrence of complete synchronization means that all oscillators can maintain the same amplitude and phase, and it is often detected between identical oscillators. However, phase synchronization means that the coupled oscillators just keep pace in oscillation even though the amplitude of each node could be different. For dimensionless dynamical systems and oscillators, the synchronization approach depends a great deal on the selection of coupling variable and type. For nonlinear circuits, a resistor is often used to bridge the connection between two or more circuits, so voltage coupling can be activated to generate feedback on the coupled circuits. In this paper, capacitor coupling is applied between two Pikovsk-Rabinovich(PR) circuits, and electric field coupling explains the potential mechanism for differential coupling. Then symmetric coupling and cross coupling are activated to detect synchronization stability, separately. It is found that resistor-based voltage coupling via a single variable can stabilize the synchronization, and the energy flow of the controller is decreased when synchronization is realized. Furthermore, by applying appropriate intensity for the coupling capacitor, synchronization is also reached and the energy flow across the coupling capacitor is helpful in regulating the dynamical behaviors of coupled circuits, which are supported by a continuous energy exchange between capacitors and the inductor. It is also confirmed that the realization of synchronization is dependent on the selection of a coupling channel. The approach and stability of complete synchronization depend on symmetric coupling, which is activated between the same variables. Cross coupling between different variables just triggers phase synchronization. The capacitor coupling can avoid energy consumption for the case with resistor coupling, and it can also enhance the energy exchange between two coupled circuits. 展开更多
关键词 SYNCHRONIZATION VOLTAGE COUPLING CHAOTIC circuit CAPACITOR COUPLING
Tunable coupling between Xmon qubit and coplanar waveguide resonator
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作者 李贺康 李科敏 +5 位作者 董航 郭秋江 刘武新 王战 王浩华 郑东宁 《中国物理B:英文版》 SCIE EI CAS CSCD 2019年第8期62-65,共4页
Realization of a flexible and tunable coupling scheme among qubits is critical for scalable quantum information processing.Here,we design and characterize a tunable coupling element based on Josephson junction,which c... Realization of a flexible and tunable coupling scheme among qubits is critical for scalable quantum information processing.Here,we design and characterize a tunable coupling element based on Josephson junction,which can be adapted to an all-to-all connected circuit architecture where multiple Xmon qubits couple to a common coplanar waveguide resonator.The coupling strength is experimentally verified to be adjustable from 0 MHz to about 40 MHz,and the qubit lifetime can still be up to 12μs in the presence of the coupling element. 展开更多
关键词 SUPERCONDUCTING Xmon QUBIT qubit-resonator COUPLING TUNABLE COUPLING
Flow Field and Temperature Field of Water-Cooling-Type Magnetic Coupling
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作者 Lei Wang Zhenyuan Jia +1 位作者 Yuqin Zhu Li Zhang 《中国机械工程学报:英文版》 SCIE EI CAS CSCD 2019年第4期61-72,共12页
At present, the water-cooling simulation of the water-cooled magnetic coupler is based on the water-cooled motor and the hydraulic coupler, which cannot accurately characterize the temperature distribution of the rota... At present, the water-cooling simulation of the water-cooled magnetic coupler is based on the water-cooled motor and the hydraulic coupler, which cannot accurately characterize the temperature distribution of the rotating watercooled coupling of the coupler. Focusing on rotating water cooling radiating, the present paper proposes simulating the water cooling temperature field as well as the flow field through the method of combining fluid-solid coupled heat transfer and MRF(Multiphase Reference Frame). In addition, taking an 800 kW magnetic coupling as an example, the paper optimizes the shape, number, cooling water inlet speed? and so on? of the cooling channel. Considering factors such as the complete machine’s temperature, and drag torque, it is proved that the cooling e ect is best when there are 36 involute curved channels and when the inlet speed is 3 m/s. Further, through experiments, the actual temperature values at six di erent positions when 50 kW and 70 kW thermal losses di er are measured. The measured values agree with the simulation results, proving the correctness of the proposed method. Further, data have been collected during the entire experimental procedure? and the variation in the coupling’s temperature is analyzed in depth, with the objective of laying a foundation for the estimation of the inner temperature rise as well as for the optimization of the structural design. 展开更多
关键词 Water-cooling MAGNETIC COUPLING Fluid-solid COUPLING Channel Three-dimensional TEMPERATURE FIELD
企业全面质量管理与技术创新的过程耦合性研究--基于北京市210家企业调查数据的分析 预览
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作者 张志强 张玺 上官单彬 《中国科技论坛》 CSSCI 北大核心 2019年第9期146-152,181,共8页
本文从PDCA的过程理论出发,构建质量管理与技术创新的过程耦合关系概念模型及耦合评价模型,选取来自5个不同行业的210家企业的问卷调查数据对质量管理与技术创新的过程耦合协调度进行实证分析,结果表明:总体上企业质量管理与技术创新间... 本文从PDCA的过程理论出发,构建质量管理与技术创新的过程耦合关系概念模型及耦合评价模型,选取来自5个不同行业的210家企业的问卷调查数据对质量管理与技术创新的过程耦合协调度进行实证分析,结果表明:总体上企业质量管理与技术创新间存在良好的过程耦合性;但不同行业两者间的耦合协调度存在差异,从大到小依次为电子行业、制药行业、汽车行业、食品行业、机械制造行业,虽有差异但均处于中度耦合以上的状态。研究结论为质量管理与技术创新的耦合协同研究提供理论和实证支持。 展开更多
关键词 质量管理 技术创新 耦合性 耦合协调度 PDCA
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Scalar Tensor Cosmology With Kinetic,Gauss-Bonnet and Nonminimal Derivative Couplings and Supersymmetric Loop Corrected Potential
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作者 Rami Ahmad El-Nabulsi 《理论物理通讯:英文版》 SCIE CAS CSCD 2019年第7期831-836,共6页
We discuss a particular four-dimensional cosmology based on non-minimal scalar tensor theories characterized by a supersymmetric loop corrected potential and a Hubble parameter defined as a function of the scalar fiel... We discuss a particular four-dimensional cosmology based on non-minimal scalar tensor theories characterized by a supersymmetric loop corrected potential and a Hubble parameter defined as a function of the scalar field.Power-law solutions are obtained in the FRW background giving rise to acceleratedly expanding universe characterized by a scale factor and a scalar field depending both on the non-minimal coupling parameterξ.Based on SNeIa data and on Hubble data X-ray gas mass fraction measurements,we find 0.116<ξ<0.225 which results on a universe dominated by vacuum energy. 展开更多
关键词 SCALAR TENSOR COSMOLOGY Gauss-Bonnet coupling non-minimal DERIVATIVE coupling vacuum energy
Process intensification and energy saving of reactive distillation for production of ester compounds
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作者 Chunli Li Cong Duan +1 位作者 Jing Fang Hongshi Li 《中国化学工程学报:英文版》 SCIE EI CAS CSCD 2019年第6期1307-1323,共17页
Reactive distillation(RD) process is an innovative hybrid process combining reaction with distillation, which has recently come into sharp focus as a successful case of process intensification. Considered as the most ... Reactive distillation(RD) process is an innovative hybrid process combining reaction with distillation, which has recently come into sharp focus as a successful case of process intensification. Considered as the most representative case of process intensification, it has been applied for many productions, especially for production of ester compounds. However, such problems existing in the RD system for ester productions are still hard to solve,as the removal of the water which comes from the esterification, and the separation of the azeotropes of ester–alcohol(–water). Many methods have been studying on the process to solve the problems resulting in further intensification and energy saving. In this paper, azeotropic–reactive distillation or entrainer enhanced reactive distillation(ERD) process, reactive extractive distillation(RED) process, the method of co-production in RD process, pressure-swing reactive distillation(PSRD) process, reactive distillation–pervaporation coupled process(RD–PV), are introduced to solve the problems above, so the product(s) can be separated efficiently and the chemical equilibrium can be shifted. Dividing-wall column(DWC) structure and novel methods of loading catalyst are also introduced as the measures to intensify the process and save energy. 展开更多
关键词 REACTIVE DISTILLATION PROCESS INTENSIFICATION PROCESS COUPLING THERMAL COUPLING
LM航改型燃机发电机组联轴器的选型与安装 预览
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作者 毛杨军 《华电技术》 CAS 2019年第8期15-19,共5页
LM航改型燃气轮机发电机组(以下简称LM机组)在对中精度等方面有极高的要求,因此对联轴器有相应技术要求:一方面要从现有联轴器的种类和性能入手,找到适用LM机组的联轴器;另一方面要重视膜盘联轴器的预拉伸安装流程。以顺德某项目中LM600... LM航改型燃气轮机发电机组(以下简称LM机组)在对中精度等方面有极高的要求,因此对联轴器有相应技术要求:一方面要从现有联轴器的种类和性能入手,找到适用LM机组的联轴器;另一方面要重视膜盘联轴器的预拉伸安装流程。以顺德某项目中LM6000型燃气轮机在冷态对中的问题为例,着重分析了不正确的安装过程对联轴器乃至整个LM机组的影响。为避免因不正当操作对机组膜盘联轴器的影响,必须严格遵照预拉伸安装步骤,加强安装前的检查和安装中的监督。 展开更多
关键词 航改型燃气轮机 对中精度 联轴器 预拉伸安装 膜盘联轴器 运输螺钉
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Influence exerted by bone-containing target body on thermoacoustic imaging with current injection
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作者 李艳红 刘国强 +1 位作者 宋佳祥 夏慧 《中国物理B:英文版》 SCIE EI CAS CSCD 2019年第4期230-241,共12页
Thermoacoustic imaging with current injection(TAI-CI) is a novel imaging technology that couples with electromagnetic and acoustic research, which combines the advantages of high contrast of the electrical impedance t... Thermoacoustic imaging with current injection(TAI-CI) is a novel imaging technology that couples with electromagnetic and acoustic research, which combines the advantages of high contrast of the electrical impedance tomography and the high spatial resolution of sonography, and therefore has the potential for early diagnosis. To verify the feasibility of TAI-CI for complex bone-containing biological tissues, the principle of TAI-CI and the coupling characteristics of fluid and solid were analyzed. Meanwhile, thermoacoustic(TA) effects for fluid model and fluid–solid coupling model were analyzed by numerical simulations. Moreover, we conducted experiments on animal cartilage, hard bone and biological soft tissue phantom with low conductivity(0.5 S/m). By injecting a current into the phantom, the thermoacoustic signal was detected by the ultrasonic transducer with a center frequency of 1 MHz, thereby the B-scan image of the objects was obtained. The B-scan image of the cartilage experiment accurately reflects the distribution of cartilage and gel, and the hard bone has a certain attenuation effect on the acoustic signal. However, compared with the ultrasonic imaging, the thermoacoustic signal is only attenuated during the outward propagation. Even in this case, a clear image can still be obtained and the images can reflect the change of the conductivity of the gel. This study confirmed the feasibility of TAI-CI for the imaging of biological tissue under the presence of cartilage and the bone. The novel TAI-CI method provides further evidence that it can be used in the diagnosis of human diseases. 展开更多
关键词 BIOMEDICAL IMAGING thermo-acoustic IMAGING fluid–solid coupling low conductivity
外加电场对原油微生物修复油污土壤的影响 预览
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作者 蔡言红 张琪雯 +2 位作者 柴晓蝶 赵元寿 孙先锋 《西安工程大学学报》 CAS 2019年第3期280-284,共5页
结合混合菌株与电场强化技术,对长庆油田油污土壤进行降解模拟实验。因不同电场强度刺激微生物产生的生物效应不同,表现出的底物降解效果也会有差异,故以0V/m作为对比,探讨100V/m,120V/m,140V/m,160V/m电场强度对混合菌株生长繁殖和迁... 结合混合菌株与电场强化技术,对长庆油田油污土壤进行降解模拟实验。因不同电场强度刺激微生物产生的生物效应不同,表现出的底物降解效果也会有差异,故以0V/m作为对比,探讨100V/m,120V/m,140V/m,160V/m电场强度对混合菌株生长繁殖和迁移特征的影响。实验表明,生长促进趋势先增后减,电场强度0~120V/m表现为生长促进作用,并在120V/m时达到最大值,140V/m时几乎不受电场影响,而160V/m则表现为生长抑制作用。将优选电场与混合菌株耦合技术应用到实际油污土壤样品修复中。结果表明,土壤中油污降解率最高达到90.2%;相比无电场作用,油污去除率提高了19.2%。 展开更多
关键词 外加电场 耦合 混合降解菌株 油污土壤 原油微生物
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煤层气提浓耦合工艺的优化研究 预览
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作者 孟建国 《山西化工》 2019年第1期122-123,149共3页
和天然气类似,煤层气开采完成后必须经过提浓处理才能进行使用,但目前各国普遍采用的煤层气的提浓工艺为使用膜进行分离的工艺及变压吸附提浓,工艺流程复杂、效率低下、耗能高、投资大,极大制约了煤层气的应用。在总结现有煤层气提浓工... 和天然气类似,煤层气开采完成后必须经过提浓处理才能进行使用,但目前各国普遍采用的煤层气的提浓工艺为使用膜进行分离的工艺及变压吸附提浓,工艺流程复杂、效率低下、耗能高、投资大,极大制约了煤层气的应用。在总结现有煤层气提浓工艺缺点的基础上,提出了一种新的煤层气提浓耦合工艺,极大提高了煤层气提浓的效率,降低了提浓成本,为进一步扩大煤层气的应用奠定了坚实的基础。 展开更多
关键词 煤层气 提浓 耦合 优化
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分布式光伏电压型逆变器控制系统的研究 预览
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作者 庄岩 徐伟明 +2 位作者 李树卿 袁敏 金祝飞 《电气开关》 2019年第4期55-57,63共4页
光伏发电系统的核心是三相电压型逆变器,通过对两相同步旋转坐标系下的数学模型的研究分析,提出了电压电流的双环控制方法,综合分析d-q坐标下电流电压的耦合和解耦关系,精确选择PI调节器系统参数,提高系统的动态及快速跟随能力,利用Mat... 光伏发电系统的核心是三相电压型逆变器,通过对两相同步旋转坐标系下的数学模型的研究分析,提出了电压电流的双环控制方法,综合分析d-q坐标下电流电压的耦合和解耦关系,精确选择PI调节器系统参数,提高系统的动态及快速跟随能力,利用Matlab搭建光伏发电系统模型并进行仿真验证。采用电压电流双闭环逆变器控制模型,在多种运行方式下,光伏发电系统均能输出三相平衡电压。 展开更多
关键词 光伏发电 电压电流双环 PI调节器 解耦 耦合
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PSGL-1 Ligation-Induced Activation of Mac-1 under Flows
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作者 Xiaoxi Sun Yuping Pan +1 位作者 Ying Fang Jianhua Wu 《医用生物力学》 CAS CSCD 北大核心 2019年第A01期90-91,共2页
Inflammation and thrombosis usually occur together in many diseases,such as cardiovascular disease(CVD)and stroke,which remain to be the mostdetrimental human health killers.The crucial relevant cellular and molecular... Inflammation and thrombosis usually occur together in many diseases,such as cardiovascular disease(CVD)and stroke,which remain to be the mostdetrimental human health killers.The crucial relevant cellular and molecular events include platelet-leukocyte interaction,platelet P-selectin secretion of activated platelet and activation of leukocyte integrin Mac-1(also known asαMβ2 or CD11b/CD18),which has binding site of platelet receptor glycoprotein lbα(GPlboα). Circulating leukocytes tethered to,rolled on and firmly adhered at the activated platelets on vascular wall,through interaction of platelet P-selectin with leukocyte P-selectin glycoprotein ligand-1(PSGL-1)and Mac-1 with GPlbα.We assume that there is a rapid signaling pathway in PSGL-1 ligation-induced activation of Mac-1,for forming a stable gap junction intracellular communication between platelet and leukocyte.To test this assumption,we observed the tethering events and calcium bursting of neutrophils on immobilized P-selectin only or plus GPlbαwith use of the parallel plate flow chamber(PPFC)technique and intracellular calcium ion detector Fluo-4 AM at various wall shear stresses,and examined the dynamic force spectrum for interaction of Mac-1 plus Mn2+and GPlbαby single-molecule atomic force microscopy(AFM).In the PPFC experiments,the intracellular calcium flux of firmly adhered neutrophils on immobilized P-selectin only or plus GPlbαwas observed in real timeby fluorescence microscopy,and the tether events of neutrophils was recorded by an inverted microscope and a high speed CMOS acquisition system in 1280 pixels×1024 pixels at 100 frames per second(fps). Captured images were analyzed by Image Pro Plus.Our results indicated that force triggered,enhanced and quickened the cytoplasmic calcium bursting of neutrophils.Calcium bursting may be induced first by interaction of the activated neutrophil Integrin Mac-1 and GPlbα,but not by P-selectin ligation to its ligand PSGL-1.Being triggered and speeded up by wall shear stress,the P-selectin-induced a 展开更多
关键词 INTEGRIN activation Mac-1-GPIbα interaction cellular calcium BURSTING force-chemical coupling
Single-Atom Protecting Group for on-Surface Synthesis of Graphdiyne Nanowires 预览
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作者 Huan Shan Ya-hui Mao Ai-di Zhao 《化学物理学报》 SCIE CAS CSCD 2019年第5期620-624,共5页
On-surface synthesis of semiconducting graphdiyne nanowires usually su er severe side re- actions owing to the high reactivity of the butadiynylene units at noble metal surfaces, limiting the production of isolated na... On-surface synthesis of semiconducting graphdiyne nanowires usually su er severe side re- actions owing to the high reactivity of the butadiynylene units at noble metal surfaces, limiting the production of isolated nanowires. In this work, we report the high-yield synthesis of branchless graphdiyne nanowires [-C≡C-Ph2-C≡C-]n via on-surface Ullmann coupling of 1,4-bis(4-bromophenyl)-1,3-butadiyne molecules with chemical vapor deposition method. Non-contact atomic force microscopy with single-bond resolution reveals that single gold adatoms act as e ective protecting groups for butadiynylene units by forming Au-π ligand bonds, preventing unwanted branched coupling reactions and enabling the synthesis of ultralong isolated graphdiyne nanowires. This study will stimulate further investigation on the role of various surface adatoms in protecting on-surface reactions. 展开更多
关键词 On-surface synthesis Graphdiyne ULLMANN coupling Protecting group Atomic force microscopy
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Dynamics of loose granular flow and its subsequent deposition in a narrow mountainous river
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作者 LEI Ming XU Ze-xing +1 位作者 ZHAO Tao WANG Xie-kang 《山地科学学报:英文版》 SCIE CSCD 2019年第6期1367-1380,共14页
A large amount of loose debris materials were deposited on the slope of mountainous areas after the 2008 Ms 8.0 Wenchuan earthquake. During and after the earthquake, these loose debris deposits collapsed and slide int... A large amount of loose debris materials were deposited on the slope of mountainous areas after the 2008 Ms 8.0 Wenchuan earthquake. During and after the earthquake, these loose debris deposits collapsed and slide into valleys or rivers, changing river sediment supply condition and channel morphology. To investigate the mechanisms of granular flow and deposition, the dynamics of slope failure and sediment transportation in typical mountainous rivers of different intersection angles were analyzed with a coupling model of Computational Fluid Dynamics and Discrete Element Method(CFD-DEM). The numerical results show that the change of intersection angle between the granular flow flume and the river channel can affect the deposit geometry and the fluid flow field significantly. As the intersection angle increases, the granular velocity perpendicular to the river channel increases, while the granular velocity parallel to the river channel decreases gradually. Compared to the test of dry granular flow, the CFD-DEM coupling tests show much higher granular velocity and larger volume of sediments entrained in the river. Due to the river flow, particles located at the edge of the deposition will move downstream gradually and the main section of sediments deposition moves from the center to the edge of the river channel. As a result, sediment supply in the downstream river will distribute unevenly. Under the erosion of fluid flow, the proportion of fine particles increases, while the proportion of coarse particles decreases gradually in the sediment deposition. The build-up of accumulated sediment mass will cause a significant increase in water level in the river channel, thus creating serious flooding hazard in mountainous rivers. 展开更多
关键词 LOOSE DEBRIS materials SEDIMENT supply CFD-DEM coupling method NUMERICAL simulations
技术创新,还是结构升级效率?——推动高质量发展的主导动能分析 预览
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作者 吴爱东 王娟 《科技管理研究》 CSSCI 北大核心 2019年第14期210-217,共8页
基于动能转换视角,探讨实现经济高质量发展所需的技术创新与产业结构升级两大主导动能之间的动态互动机制,运用CHD模型分析我国两大主导动能之间的关联关系,并利用GRA得到影响现阶段主导动能的关键因素。结果表明,在样本初期,两大主导... 基于动能转换视角,探讨实现经济高质量发展所需的技术创新与产业结构升级两大主导动能之间的动态互动机制,运用CHD模型分析我国两大主导动能之间的关联关系,并利用GRA得到影响现阶段主导动能的关键因素。结果表明,在样本初期,两大主导动能的耦合协调度受二者发展水平的影响较大,但在中后期,受二者耦合度的影响较大此外,两大主导动能之间传递信息时存在一定的滞后性,影响现阶段主导动能的关键因素有专利申请授权数、R&D人员投入占比、生产性服务业占比和改进后的泰尔系数。最后为我国实现高质量发展提出政策建议。 展开更多
关键词 主导动能 技术创新 产业结构升级 转换 耦合
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基于OPC技术的水冷PEMFC热管理控制系统
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作者 牛茁 张玉瑾 +2 位作者 邓惠文 陈维荣 刘志祥 《太阳能学报》 EI CAS CSCD 北大核心 2019年第4期942-949,共8页
为改善传统温度控制方法在水冷型质子交换膜燃料电池(PEMFC)系统工作中出现的冷却水泵和散热器风扇的强耦合特性,该文提出一种流量跟随功率的改进温度控制策略。通过OPC技术(用于过程控制的OLE)实现可编程逻辑控制器(PLC)和Matlab的实... 为改善传统温度控制方法在水冷型质子交换膜燃料电池(PEMFC)系统工作中出现的冷却水泵和散热器风扇的强耦合特性,该文提出一种流量跟随功率的改进温度控制策略。通过OPC技术(用于过程控制的OLE)实现可编程逻辑控制器(PLC)和Matlab的实时通讯,利用Matlab/Simulink模拟电堆功率和输出控制量。最后,在水冷PEMFC热管理实验平台对流量跟随功率控制与传统温度控制策略进行实验对比,实验结果表明,流量跟随功率控制策略实现了冷却水泵和散热器风扇有效解耦,具有较好的控制精度和响应速度,取得了优于传统温度控制策略的控制效果,能够满足水冷PEMFC系统对温度控制的需求。 展开更多
关键词 质子交换膜燃料电池 耦合 PLC 控制 OPC技术
Large Rabi splitting obtained in Ag‐WS2 strong‐coupling heterostructure with optical microcavity at room temperature 预览
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作者 Bowen Li Shuai Zu +11 位作者 Zhepeng Zhang Liheng Zheng Qiao Jiang Bowen Du Yang Luo Yongji Gong Yanfeng Zhang Feng Lin Bo Shen Xing Zhu Pulickel M. Ajayan Zheyu Fang 《光电进展(英文)》 2019年第5期1-9,共9页
Manipulation of light-matter interaction is critical in modern physics, especially in the strong coupling regime, where the generated half-light, half-matter bosonic quasiparticles as polaritons are important for fund... Manipulation of light-matter interaction is critical in modern physics, especially in the strong coupling regime, where the generated half-light, half-matter bosonic quasiparticles as polaritons are important for fundamental quantum science and applications of optoelectronics and nonlinear optics. Two-dimensional transition metal dichalcogenides (TMDs) are ideal platforms to investigate the strong coupling because of their huge exciton binding energy and large absorption coefficients. Further studies on strong exciton-plasmon coupling by combining TMDs with metallic nanostructures have generated broad interests in recent years. However, because of the huge plasmon radiative damping, the observation of strong coupling is significantly limited at room temperature. Here, we demonstrate that a large Rabi splitting (~300 meV) can be achieved at ambient conditions in the strong coupling regime by embedding Ag-WS2 heterostructure in an optical microcavity. The generated quasiparticle with part-plasmon, part-exciton and part-light is analyzed with Hopfield coefficients that are calculated by using three-coupled oscillator model. The resulted plasmon-exciton polaritonic hybrid states can efficiently enlarge the obtained Rabi splitting, which paves the way for the practical applications of polaritonic devices based on ultrathin materials. 展开更多
关键词 RABI SPLITTING STRONG COUPLING transition metal DICHALCOGENIDES optical microcavity surface PLASMONS
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湍流与化学团聚耦合促进电除尘脱除燃煤颗粒的试验研究
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作者 申奥 孙宗康 +3 位作者 周磊 胡斌 袁竹林 杨林军 《中国电机工程学报》 EI CSCD 北大核心 2019年第10期2954-2961,共8页
在燃煤热态实验平台的基础上开展湍流与化学团聚耦合促进电除尘脱除燃煤颗粒的实验研究,通过电称低压冲击器分别测量湍流团聚、化学团聚及二者耦合作用时烟气中细颗粒数量浓度及粒径分布的变化。发现湍流与化学团聚耦合作用使颗粒团聚... 在燃煤热态实验平台的基础上开展湍流与化学团聚耦合促进电除尘脱除燃煤颗粒的实验研究,通过电称低压冲击器分别测量湍流团聚、化学团聚及二者耦合作用时烟气中细颗粒数量浓度及粒径分布的变化。发现湍流与化学团聚耦合作用使颗粒团聚效率提高到59%,且随着粒径增大湍流团聚分级团聚效率从16%逐渐降低而化学团聚分级团聚效率从21%逐渐增大至50%以上。湍流与化学团聚耦合能够有效提高电除尘对细颗粒物的脱除作用,这种作用是通过促进颗粒团聚而间接实现的。此外,湍流与化学团聚有着相互促进的内在耦合机制。 展开更多
关键词 湍流团聚 化学团聚 电除尘 脱除 耦合
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