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学者姓名：王大彪
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Abstract ：
Ammonia is a carbon-free energy carrier with 17.6 wt% hydrogen content. The design of an efficient and compact ammonia decomposition reactor based on low-temperature catalysts is the key to realizing industrial hydrogen production from ammonia. In this work, a multiscale model was developed by bridging the particle-scale characteristics of catalysts and reactor performances, to fully comprehend the ammonia decomposition process. The effects of catalyst porosity and pore diameters on the reactor size, precious metal loading, and the profile of temperature and heat flux were systematically evaluated. An improved reactor design was further proposed by applying the segmented reactor packed with two-stage egg-shell-type low-temperature catalysts, which decreased the precious metal usage by 61.6% and the temperature drop by 42.9 K. This segmentation strategy balanced the reaction rate and heat flux, indicating a significant potential in highly efficient, economical, and reliable hydrogen production from ammonia.
Keyword ：
ammonia decomposition ammonia decomposition catalyst micro-structure catalyst micro-structure hydrogen production hydrogen production multiscale model multiscale model precious metal reduction precious metal reduction
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| GB/T 7714 | Zhang, Lixuan , Wu, Yifan , Huang, Wenshi et al. Multiscale modeling of a low-temperature NH3 decomposition reactor for precious metal reduction and temperature control [J]. | AICHE JOURNAL , 2025 . |
| MLA | Zhang, Lixuan et al. "Multiscale modeling of a low-temperature NH3 decomposition reactor for precious metal reduction and temperature control" . | AICHE JOURNAL (2025) . |
| APA | Zhang, Lixuan , Wu, Yifan , Huang, Wenshi , Lin, Li , Wang, Luqiang , Wu, Zeyun et al. Multiscale modeling of a low-temperature NH3 decomposition reactor for precious metal reduction and temperature control . | AICHE JOURNAL , 2025 . |
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结肠镜检查依赖于操作人员且漏检率较高,所以需要一种实时的息肉分割算法,来辅助医生的息肉检测工作.因此论文提出短期密集连接注意网络(Short-Term Dense Concatenate Attention Network,STDCANet).网络编码端的核心层是短期密集连接注意模块,此模块整合了传统卷积、STDC、残差思想和NAM的优势,以较小的计算复杂度保留了可伸缩的感受野和多尺度信息,在解码端引入了PD解码器,摈弃了部分底层特征用于模型的加速,聚合了高层特征实现了较好的分割结果.STDCANet在CVC-ClinicDB数据集上与经典的医学图像分割网络进行性能和模型复杂度的对比,在这两方面均优于对比网络,有临床实时分割的潜力.
Keyword ：
医学图像处理 医学图像处理 注意力机制 注意力机制 深度学习 深度学习 结肠镜图像 结肠镜图像
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| GB/T 7714 | 李兰兰 , 张孝辉 , 王大彪 . 基于短期密集连接注意网络的结肠息肉分割方法 [J]. | 计算机与数字工程 , 2024 , 52 (8) : 2469-2472,2497 . |
| MLA | 李兰兰 et al. "基于短期密集连接注意网络的结肠息肉分割方法" . | 计算机与数字工程 52 . 8 (2024) : 2469-2472,2497 . |
| APA | 李兰兰 , 张孝辉 , 王大彪 . 基于短期密集连接注意网络的结肠息肉分割方法 . | 计算机与数字工程 , 2024 , 52 (8) , 2469-2472,2497 . |
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For the scope of commercial supermarkets, the demand for energy efficiency improvement and environmentallyfriendly working fluid of the refrigeration system is necessary. In this study, supermarket booster refrigeration system by using eco-friendly working fluid CO 2 /halogenated alkene (HA) mixture is proposed, and the mixture used in systems with two evaporation temperatures and operating modes affected by ambient temperature are studied. The energy efficiency, economic performance and emission reduction potential of the whole life cycle are conducted to compare with the pure CO 2 booster refrigeration system. Furthermore, the influence of climate condition is discussed when used in 40 typical cities around the world. The results show the coefficient of performance (COP) of booster refrigeration system can be significantly improved by using CO 2 /HA mixtures. As the ambient temperature is 33 degrees C, the CO 2 /R1234yf (93/7) operates with the maximum COP of 1.367, which is 11.59 % higher than that of pure CO 2 . Using CO 2 /HA mixtures in the booster refrigeration system can significantly improve the exergy efficiency of system. Moreover, the system using CO 2 /HA mixtures has higher annual performance factor and lower life cycle cost (LCC) than pure CO 2 . LCC of the system using CO 2 /R1234yf (94/6) is the lowest, and the reduction rate is 3.06 - 5.59 %. Meanwhile, the life cycle carbon emissions of systems in different climatic regions using CO 2 /R1234yf can be reduced by 2.39 - 5.21 %. The booster refrigeration system adopting CO 2 /HA mixtures is a promising alternative solution for commercial supermarket refrigeration and energy -saving.
Keyword ：
CO2/Halogenated alkene mixture CO2/Halogenated alkene mixture Economic and environmental analysis Economic and environmental analysis Energy and exergy performance Energy and exergy performance Life cycle assessment Life cycle assessment Supermarket booster refrigeration system Supermarket booster refrigeration system
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| GB/T 7714 | Dai, Baomin , Wu, Tianhao , Liu, Shengchun et al. Assessment of booster refrigeration system with eco-friendly working fluid CO 2 /halogenated alkene (HA) mixture for supermarket application around the world: Energy conservation, cost saving, and emissions reduction potential [J]. | ENERGY , 2024 , 297 . |
| MLA | Dai, Baomin et al. "Assessment of booster refrigeration system with eco-friendly working fluid CO 2 /halogenated alkene (HA) mixture for supermarket application around the world: Energy conservation, cost saving, and emissions reduction potential" . | ENERGY 297 (2024) . |
| APA | Dai, Baomin , Wu, Tianhao , Liu, Shengchun , Zhang, Peng , Zhang, Jianing , Fu, Rao et al. Assessment of booster refrigeration system with eco-friendly working fluid CO 2 /halogenated alkene (HA) mixture for supermarket application around the world: Energy conservation, cost saving, and emissions reduction potential . | ENERGY , 2024 , 297 . |
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Long-term energy storage and carbon capture technologies are pivotal in managing renewable energy surpluses and achieving carbon neutrality. This paper proposes a Carnot battery system integrating calcium-looping thermochemical energy storage with a coal-fired power plant. The system utilizes excess electricity from the grid for energy input, facilitating long-term energy storage, achieving carbon capture, and reducing coal consumption in the power plant. An optimization framework is developed, incorporating component thermodynamic models and optimization algorithms, to maximize the coal savings in plants and energy efficiencies of the Carnot battery system. During the energy release process, the carbonator partially replaces the reheat load of the boiler, necessitating retrofitting of the boiler's heating surface to ensure normal operation. The base system demonstrates a CO2 capture capacity of 3.23 MJ/kg and a reduction in coal consumption by 7.07 %. The round-trip efficiency and comprehensive efficiency of the base system are 36.93 % and 37.91 %, respectively. The relatively low energy efficiency is primarily due to the deactivation of circulating adsorbents and the limited efficiency of the subcritical coal-fired power plant. By incorporating an additional recarbonation step to mitigate adsorbent deactivation, the system's comprehensive efficiency is improved to 42.20 %. Further improvements in system efficiency can be achieved by using modified adsorbents with high cycling stability instead of natural limestone and by coupling the system with more efficient ultra-supercritical units instead of the investigated subcritical units. This study offers valuable insights into the development of long-term energy storage solutions and multifunctional Carnot battery technology. © 2024 Elsevier Ltd
Keyword ：
Calcium looping Calcium looping Carbon capture Carbon capture Carnot battery Carnot battery Coal-fired power plant Coal-fired power plant Thermochemical energy storage Thermochemical energy storage
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| GB/T 7714 | Wang, D. , Sun, Z. , Xu, Q. et al. Thermodynamic modeling and analysis of a Carnot battery system integrating calcium looping thermochemical energy storage with coal-fired power plant [J]. | Energy Conversion and Management , 2024 , 318 . |
| MLA | Wang, D. et al. "Thermodynamic modeling and analysis of a Carnot battery system integrating calcium looping thermochemical energy storage with coal-fired power plant" . | Energy Conversion and Management 318 (2024) . |
| APA | Wang, D. , Sun, Z. , Xu, Q. , Tian, R. , Han, W. , Shen, J. . Thermodynamic modeling and analysis of a Carnot battery system integrating calcium looping thermochemical energy storage with coal-fired power plant . | Energy Conversion and Management , 2024 , 318 . |
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To meet the simultaneous needs of high temperature disinfection and freezing in the field of food processing, a new concept of combined heating and cooling transcritical CO2 system integrated with dedicated mechanical subcooling utilizing hydrocarbon mixture is proposed. The system performance in terms of thermodynamics, economy and environment is studied and compared with the baseline combined heating and cooling transcritical CO2 system and four traditional combined heating and cooling solutions, considering the influence of temperature glide and the heat transfer deterioration. The new proposed system is further optimized by using the machine learning method of artificial neural network and non-dominated sorting genetic algorithm. Multi-objective optimization is conducted considering the objective function of energy efficiency, initial capital cost and life cycle carbon emissions of the new system, to obtain the optimum components and concentration ratio of the hydrocarbon mixture. The results indicate the thermodynamic performance and environmental benefits of subcooling subsystem with hydrocarbon mixture are better than those of the pure system. In contrast to that using pure R290 and R601, the coefficient of performance is enhanced by 8.20 % and 8.13 % and the life cycle carbon emission is reduced by 8.54 % and 9.31 %, respectively, when R290/R601 (50/50) is used. However, the initial capital cost is 9.25 % and 10.23 % higher than that of pure R290 and R601, respectively. Finally, the hydrocarbon mixture corresponding to the optimal design point is R1270/R601a (53/47), the corresponding discharge pressure is 12.86 MPa, and the subcooling degree is 37.50 degrees C. This study can provide a theoretical reference for the application of CO2 refrigeration and heat pump technology.
Keyword ：
Combined heating and cooling Combined heating and cooling Dedicated mechanical subcooling Dedicated mechanical subcooling Hydrocarbon mixture Hydrocarbon mixture Machine learning Machine learning Multi-objective optimization Multi-objective optimization Transcritical CO2 Transcritical CO2
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| GB/T 7714 | Dai, Baomin , Wang, Qilong , Liu, Shengchun et al. Multi-objective optimization analysis of combined heating and cooling transcritical CO2 system integrated with mechanical subcooling utilizing hydrocarbon mixture based on machine learning [J]. | ENERGY CONVERSION AND MANAGEMENT , 2024 , 301 . |
| MLA | Dai, Baomin et al. "Multi-objective optimization analysis of combined heating and cooling transcritical CO2 system integrated with mechanical subcooling utilizing hydrocarbon mixture based on machine learning" . | ENERGY CONVERSION AND MANAGEMENT 301 (2024) . |
| APA | Dai, Baomin , Wang, Qilong , Liu, Shengchun , Zhang, Jianing , Wang, Yabo , Kong, Ziang et al. Multi-objective optimization analysis of combined heating and cooling transcritical CO2 system integrated with mechanical subcooling utilizing hydrocarbon mixture based on machine learning . | ENERGY CONVERSION AND MANAGEMENT , 2024 , 301 . |
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为解决深度学习分割算法在病灶的细节分割上存在漏判且模型参数量较大不利于实际应用的问题,提出一种基于改进的CG-Net的深度轻量化分割神经网络.在编码块加入改进高效金字塔拆分注意力模块和深度可分离卷积,以学习丰富多尺度全局特征;采用残差思想将注意力模块与编码块结合,提出高效金字塔语境引导模块,帮助网络学习全局和局部特征信息.在中山大学附属第六医院提供的腹部MRI图像数据库的结直肠肿瘤病灶分割实验中,验证了改进模型算法在分割精度和模型轻量化方面的有效性.
Keyword ：
医学图像分割 医学图像分割 注意力机制 注意力机制 深度可分离卷积 深度可分离卷积 深度学习 深度学习 结直肠癌 结直肠癌 编码解码网络 编码解码网络 轻量级 轻量级
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| GB/T 7714 | 李兰兰 , 胡益煌 , 王大彪 et al. CG-Net改进的结直肠癌病灶分割算法 [J]. | 计算机工程与设计 , 2024 , 45 (1) : 299-306 . |
| MLA | 李兰兰 et al. "CG-Net改进的结直肠癌病灶分割算法" . | 计算机工程与设计 45 . 1 (2024) : 299-306 . |
| APA | 李兰兰 , 胡益煌 , 王大彪 , 徐斌 , 李娟 . CG-Net改进的结直肠癌病灶分割算法 . | 计算机工程与设计 , 2024 , 45 (1) , 299-306 . |
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研究的目的是建立一个深度学习模型，用于进行直肠癌患者新辅助放化疗后的病理完全反应的预测。回顾性分析了99例直肠癌患者的MR影像资料，并按照训练组(71例)和测试组(28例)进行划分构成数据集。通过U-Net定位分割出肿瘤大致区域，在预测阶段通过改变神经网络卷积层数和切片大小得到了9个基础预测模型，并且利用权重分配法对预测得分进行修正。在验证组9个模型中，切片大小为256*256时，包含4个卷积层的模型整体性能最好，3折交叉验证中平均准确率、特异性和敏感性分别达到了0.714、0.717和0.708。研究构建的模型可以作为辅助工具对结直肠癌晚期患者对新辅助治疗的病理反应进行预测，预测精度较好，可为临床治疗提供参考。
Keyword ：
新辅助放化疗 新辅助放化疗 病理完全反应预测 病理完全反应预测 直肠癌 直肠癌 磁共振图像 磁共振图像 神经网络 神经网络
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| GB/T 7714 | 李兰兰 , 徐斌 , 李娟 et al. 基于权重分配的直肠癌病理完全反应预测算法 [J]. | 计算机仿真 , 2024 , 41 (04) : 314-319 . |
| MLA | 李兰兰 et al. "基于权重分配的直肠癌病理完全反应预测算法" . | 计算机仿真 41 . 04 (2024) : 314-319 . |
| APA | 李兰兰 , 徐斌 , 李娟 , 王大彪 . 基于权重分配的直肠癌病理完全反应预测算法 . | 计算机仿真 , 2024 , 41 (04) , 314-319 . |
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Ammonia decomposition for onsite hydrogen production has been regarded as an important reaction which links to efficient hydrogen storage, transport and utilization. However, it still remains challenging to develop efficient catalysts with robust stability for ammonia decomposition. Herein, an integrated strategy was employed to synthesize Ru/SiO2@N-CS via wrapping a thin layer of N-doped carbon onto the SiO2 sphere, following the anchor of Ru nanoparticles (NPs) onto the support. The obtained Ru/SiO2@N-CS (Ru loading: 1 wt%) shows a promising performance for ammonia decomposition, reaching 94.5 % at 550 °C with a gas hourly space velocity (GHSV) of 30 000 mL gcat-1h−1. The combination of the SiO2 as the core prevents the degradation of N-doped carbon layers and then enhance the durability of the catalysts, remaining stable after 50 h at evaluated temperatures. Adequate characterizations were used to illustrate the effect of microchemical environment on ammonia decomposition activity of Ru/SiO2@N-CS catalyst under different calcination atmosphere and the correlation between structure and performance. © 2024 Elsevier B.V.
Keyword ：
Ammonia decomposition Ammonia decomposition N-doped carbon N-doped carbon Ruthenium Ruthenium SiO2 SiO2 Stability Stability
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| GB/T 7714 | Huang, Y. , Ren, H. , Fang, H. et al. Ru nanoparticles embedded in Ru/SiO2@N-CS for boosting hydrogen production via ammonia decomposition with robust lifespan [J]. | Applied Surface Science , 2024 , 669 . |
| MLA | Huang, Y. et al. "Ru nanoparticles embedded in Ru/SiO2@N-CS for boosting hydrogen production via ammonia decomposition with robust lifespan" . | Applied Surface Science 669 (2024) . |
| APA | Huang, Y. , Ren, H. , Fang, H. , Ouyang, D. , Chen, C. , Luo, Y. et al. Ru nanoparticles embedded in Ru/SiO2@N-CS for boosting hydrogen production via ammonia decomposition with robust lifespan . | Applied Surface Science , 2024 , 669 . |
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The flow boiling characteristics of CO2/R152a zeotropic mixtures with three mass fractions (22.1/77.9, 47.4/ 52.6 and 65.3/34.7 wt.%) and the pure components in a 2 mm horizontal tube are experimentally studied. The flow boiling characteristics are tested in the range of temperature glide of 30.9-38.3 degrees C, mass flux of 200-400 kg/m2s, heat flux of 12-36 kW/m2, and saturation temperature of 5-15 degrees C. Flow patterns are observed and the flow pattern map is also described, and the heat transfer and pressure drop characteristics of working fluid are also conducted. Furthermore, a new correlation to predict the heat transfer coefficient of large temperature glide working fluid is proposed. The results show 7 types of flow patterns are recorded, showing the flowing char-acteristic between the conventional and microscale channel. The heat transfer coefficient of CO2/R152a in-creases slowly with vapor quality, and decrease rapidly when vapor quality reaches to the initial dryout vapor quality, which is lower than that of pure CO2. The mass transfer resistance and sensible heat resistance shows a severe deterioration effect on the flow boiling heat transfer due to the high temperature glide as the sensible heat accounts for 13.12-15.44 % for the mixture CO2/R152a. The frictional pressure drop gradient of CO2/R152a increases with mass flux, and decreases with the increase of saturation temperature and mass fraction of CO2. Considering the mass transfer resistance and effects of non-negligible sensible heat contribution, a new heat transfer correlation is proposed, with the mean absolute deviation of 16.9 %, which shows an acceptable pre-diction accuracy compared with the reported data in the literatures.
Keyword ：
CO2/R152a CO2/R152a Correlation development Correlation development Flow boiling heat transfer Flow boiling heat transfer Large temperature glide Large temperature glide Mass transfer resistance Mass transfer resistance Zeotropic mixture Zeotropic mixture
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| GB/T 7714 | Dai, Baomin , Wu, Tianhao , Liu, Shengchun et al. Flow boiling heat transfer characteristics of zeotropic mixture CO2/R152a with large temperature glide in a 2 mm horizontal tube [J]. | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER , 2023 , 218 . |
| MLA | Dai, Baomin et al. "Flow boiling heat transfer characteristics of zeotropic mixture CO2/R152a with large temperature glide in a 2 mm horizontal tube" . | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 218 (2023) . |
| APA | Dai, Baomin , Wu, Tianhao , Liu, Shengchun , Qi, Haifeng , Zhang, Peng , Wang, Dabiao et al. Flow boiling heat transfer characteristics of zeotropic mixture CO2/R152a with large temperature glide in a 2 mm horizontal tube . | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER , 2023 , 218 . |
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The integrated energy system (IES) has been a qualified candidate for solving the problems of energy utilization and environmental pollution. In this study, an improved IES scheduling optimization model based on an improved particle swarm algorithm is established, and the daily operating cost is taken as the objective function. Constraints on the energy supply and consumption sides are fully considered. The results show that with the energy storage conversion scheduling strategy participating in the optimization, the daily cost is significantly decreased by 10.5%. Compared with the genetic algorithm with elite strategy, the particle swarm algorithm is more suitable for the IES, with the lowest daily cost of $ 6, 193. Besides, the improved annealing particle swarm algorithm has better adaptability when facing high-dimensional multimodal function problems, and performs better on global search and local optimization. © 2023 Published under licence by IOP Publishing Ltd.
Keyword ：
Energy utilization Energy utilization Genetic algorithms Genetic algorithms Glass ceramics Glass ceramics
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| GB/T 7714 | Zhao, Yuan , Shi, Leiming , Chen, Shunyi et al. Scheduling optimization of IES based on improved particle swarm algorithm [C] . 2023 . |
| MLA | Zhao, Yuan et al. "Scheduling optimization of IES based on improved particle swarm algorithm" . (2023) . |
| APA | Zhao, Yuan , Shi, Leiming , Chen, Shunyi , Sun, Boyang , Zheng, Yingxia , Gao, Jun et al. Scheduling optimization of IES based on improved particle swarm algorithm . (2023) . |
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