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RESID HYDROCONVERSION—A NEW APPROACH IN PROCESSING INFERIOR RESIDUAL OILS

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石油学报（石油加工） 2001年第1期17卷 35-41页

作者： li Zhi qiang, liU jia ming, SUN li li (Beijing Design Institute, SINOPEC, Beijing 100724, China) 中国石油化工公司北京设计所北京 100724 中国石油化工总公司北京设计所北京 100724

In order to meet the market demands for more premium distillates and the more stringent requirements of environment protection, China refineries should find a better way for deep processing of residues. This paper describes the necessity, overview and application of the resid hydroconversion process in China. Qilu Petrochemical Co. built the first vacuum resid hydrodesulfurization (VRDS) unit with a capacity of 840 kt/a of Gudao vacuum residue in 1986. And Dalian West Pacific Petrochemical Co. Ltd. built the first atmospheric resid hydrodesulfurization (ARDS) unit with the capacity of 2 Mt/a in 1992. Beijing Design Institute SINOPEC did the engineering design of these two units. Some modifications on the units were carried out, which gives the adaptability and flexibility in processing inferior crudes such as high sulfur crudes.

关键词：加氢裂化残油市场需求环境保护

Prototype of the readout electronics for the RICH PID detector in the STCF

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Nuclear Science and Techniques 2022年第6期33卷 148-160页

作者： Bao-lin Hou Lei Zhao jia-Jun Qin Ye-Qun Qi jia-ming li Zi-Yu Yang Shu-Bin liu Qi An State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China School of Information Engineering Southwest University of Science and TechnologyMianyang 621010China

The ring imaging Cherenkov(RICH) detector for particle identification(PID) is being evaluated for the future super tau-charm facility(STCF) complex. In this work, the prototype readout electronics for the RICH PID detector is designed. The prototype RICH PID detector is based on a thick gas electron multiplier combined with a micromegas detector for Cherenkov light detection. Considering that there will be a large number(~ 690,000) of detector channels in future RICH detector, the readout electronics faces many challenges to precisely measuring time and charge information, such as reducing the noise,increasing density, and improving precision. The requirements of the readout electronics are explored, the downselection of the ASICs is made and thus a prototype readout electronics is designed and implemented. Tests are also conducted to evaluate the performance of the prototype readout electronics, and the results indicate that the time resolution is better than ~ 1 ns(RMS) when the input charge is greater than ~ 12 fC based on the APV25chip, while the time resolution is better than ~ 1 ns(RMS) at an input charge of over ~ 48 fC based on the AGET and STCF ASIC chips, and the equivalent noise charge is better than ~ 0.5 fC(RMS) @ 20 pF based on the three ASICs. The test results indicate that the prototype readout electronics design meets the requirement of the future RICH PID detector and thus provides a reference for future engineering.

关键词： Readout electronics Time measurement Charge measurement RICH PID detector STCF

Research advances in allelopathy of Quercus L.

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Forestry Studies in China 2007年第4期9卷 287-294页

作者： li Guang-de jia li-ming li Xiao-wen The Key Laboratory for Silviculture and Conservation of the Ministry of Education College of Forestry Beijing Forestry UniversityBeijing 100083 P. R. China

The term allelopathy refers to biochemical interaction between all types of plants including microorganisms through production of chemical compounds that escape into the environment and exist widely in Quercus L. The development of investigations into types of allelochemicals, their compounding and spreading pathways, as well as expression of allelopathy in Quercus L. are reviewed in this paper： We have closely and systematically emphasized the functional mechanisms of allelopathy in forest plants for our next research project on allelopathy in Quercus L.

关键词： Quercus L. allelopathy functional mechanism

Solidification in a shell-and-tube thermal energy storage unit filled with longitude fins and metal foam:A numerical study

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Energy and Built Environment 2023年第1期4卷 64-73页

作者： Xiaohu Yang Fengfei Xu Xinyi Wang Junfei Guo ming-jia li Institute of the Building Environment&Sustainability Technology School of Human Settlements and Civil EngineeringXi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049China Shanghai Industrial Boiler(Wuxi)CO. LTD.Wuxi 214000China

In this study,an innovative thermal energy storage design method was developed by adding the combination of metal foam and fin to phase change materials(PCMs).A numerical model was built and verified based on the comparison among the present model prediction,experimental measurements,and numerical results in open *** highlight the novel design method,four cases including fin-PCM,foam-PCM,fin-foam-PCM,and PCM unit were compared by means of solidification *** temperature distribution,solidification front propa-gation,and buoyancy-induced convection in the liquid PCM were accounted *** results demonstrated that metal foam outperformed fin regarding the improvement on solidification phase *** combination of foam and fin achieved the best performance,leading to a 90.5%reduction in complete energy release time in comparison with the PCM *** proposed design method provided reference potentials for advancing energy storage ***,buoyancy-induced convection in the liquid PCM before solidification was harmful to the formation of solidification front and its movement.A maximal 11.5%prolonging time for the complete solidification was found.

关键词： Thermal energy storage Phase change materials Metal foam Shell and tube heat exchanger Solidification

Modification and refinement effects of Sb and Sr on Mg_(17)Al_(12) and Mg_2Si phases in Mg-12Al-0.7Si alloy

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China Foundry 2016年第5期13卷 310-315页

作者： Zhi-wen Wang Hong-xia Wang jia-lin Gong ming li Wei-li Cheng Wei liang Key Laboratory of lnterface Science and Engineering in Advanced Materials Taiyuan University of Technology Ministry of Education Taiyuan 030024 Shanxi China

The effects of Sb and Sr on the modification and refinement of Mg17Al12 and Mg2Si phases in Mg- 12Al-0.7Si alloy were investigated and compared. The microstructure and mechanical properties of Mg-12Al0.7Si alloy and its modification mechanism by Sb and Sr were investigated using a scanning electron microscope （SEM）, an energy dispersive spectrometer （EDS）, X-ray diffraction （XRD） and differential thermal analysis （DTA）. The results indicate that by adding 0.5wt.% Sb to the Mg-12Al-0.7Si alloy, the Mg17Al12 phase was refined and broken into some discontinuous island structures. However, some network Mg17Al12 phases still can be detected in Mg-12Al-0.7Si-0.09Sr alloy. Therefore, Sb performs better in modification and refinement of Mg17Al12 phase than does Sr. Small amounts of fine polygonal shaped Mg2Si phases were found in Mg-12AI-0.7Si-0.5Sb alloy, while the morphology of Mg2Si phases in Mg-12Al-0.7Si-0.09Sr alloy changed from the coarse Chinese script shapes to fine granule and irregular polygonal shapes, indicating that the effects of modification and refinement on Mg2Si phase are more significant by adding 0.09wt.% Sr than 0.5wt.% Sb. The ultimate tensile strengths of the Sb and Sr modified Mg-12Al-0.7Si alloys were considerably increased both at room temperature and at 200 ℃.

关键词： magnesium alloy Sb Sr Mg17Al12 phase Mg2Si phase

A Gaussian process regression accelerated multiscale model for conduction-radiation heat transfer in periodic composite materials with temperature-dependent thermal properties

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Advances in Aerodynamics 2022年第1期4卷 642-661页

作者： Zi-Xiang Tong ming-jia li Zhaolin Gu Jun-Jie Yan Wen-Quan Tao School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an710049ShaanxiChina Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an710049ShaanxiChina School of Energy and Power Engineering Xi’an Jiaotong UniversityXi’an710049ShaanxiChina

Prediction of the coupled conduction-radiation heat transfer in composite materials with periodic structure is important in high-temperature applications of the materials. The temperature dependence of thermal properties complicates the problem. In this work, a multiscale model is proposed for the conduction-radiation heat transfer in periodic composite materials with temperature-dependent thermal properties. Homogenization analysis of the coupled conduction and radiative transfer equations is conducted, in which the temperature dependence of thermal properties is considered. Both the macroscopic homogenized equations and the local unit cell problems are derived. It is proved that the macroscopic average temperature can be used in the unit cell problems for the first-order corrections of the temperature and radiative intensity, and the calculations of effective thermal properties. The temperature dependence of thermal properties only influences the higher-order corrections. A multiscale numerical method is proposed based on the analysis. The Gaussian process (GP) regression is coupled into the multiscale algorithm to build a correlation between thermal properties and temperature for the macroscale iterations and prevent the repetitive solving of unit cell problems. The GP model is updated by additional solutions of unit cell problems during the iteration according to a variance threshold. Numerical simulations of conduction-radiation heat transfer in composite with isotropic and anisotropic periodic structures are used to validate the proposed multiscale model. It is found that the accuracy and efficiency of the multiscale method can be guaranteed by using a proper variance threshold for the GP model. The multiscale model can provide both the average temperature and radiative intensity fields and their detailed fluctuations due to the local structures.

关键词： Multiscale model Heat Conduction Radiative transfer equation Temperature-dependent Gaussian process regression Machine learning

A modified transformer and adapter-based transfer learning for fault detection and diagnosis in HVAC systems

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Energy Storage and Saving 2024年第2期3卷 96-105页

作者： Zi-Cheng Wang Dong li Zhan-Wei Cao Feng Gao ming-jia li Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an710049China Science and Technology on Space Physics Laboratory China Academy of Launch Vehicle TechnologyBeijing100076China School of Mechanical Engineering Beijing Institute of TechnologyBeijing100081China

Fault detection and diagnosis(FDD)of heating,ventilation,and air conditioning(HVAC)systems can help to improve the energy saving in building energy ***,most data-driven trained FDD models have limited generalizability and can only be applied to specific *** diversity of HVAC systems and the high cost of data acquisition present challenges for the practical application of *** learning technology can be employed to mitigate this problem by training a model on systems with sufficient data and then transfer it to other systems with limited *** this study,a novel transfer learning approach for HVAC FDD is ***,the transformer model is modified to incorporate one encoder and two decoders connected,enabling two *** modified transformer model accommodates absent features in the target domain and serves as a robust foundation for transfer *** has effective performance in complex systems and achieves an accuracy of 91.38%for a system with 16 faults and multiple fault severity ***,the adapter-based parameter-efficient transfer learning method,facilitating the transfer of trained models simply by inserting small adapter modules,is investigated as the transfer learning *** demonstrate that this adapter-based transfer learning approach achieves satisfactory performance similar to full fine-tuning with fewer trainable *** works well with limited data amount in target ***,the findings highlight the significance of adapters positioned near the bottom and top layers,emphasizing their critical role in facilitating successful transfer learning.

关键词： Fault detection and diagnosis Transfer learning HVAC system Energy saving Transformer model

Research progress in Asia on methods of processing laser-induced breakdown spectroscopy data

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Frontiers of physics 2016年第5期11卷 137-149页

作者： Yang-Min Guo lian-Bo Guo jia-ming li Hong-Di liu Zhi-Hao Zhu Xiang-You li Yong-Feng Lu Xiao-Yan Zeng Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology (HUST) Wuhan 430074 China

Laser-induced breakdown spectroscopy （liBS） has attracted much attention in terms of both scientific research and industrial application. An important branch of liBS research in Asia, the development of data processing methods for liBS, is reviewed. First, the basic principle of liBS and the characteristics of spectral data are briefly introduced. Next, two aspects of research on and problems with data processing methods are described： i） the basic principles of data preprocessing methods are elaborated in detail on the basis of the characteristics of spectral data; ii） the performance of data analysis methods in qualitative and quantitative analysis of liBS is described. Finally, a direction for future development of data processing methods for liBS is also proposed.

关键词： laser-induced breakdown spectroscopy data preprocessing data analysis

Arylene Diimide Derivatives as Anolyte Materials with Two-Electron Storage for Ultrastable Neutral Aqueous Organic Redox Flow Batteries

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CCS Chemistry 2023年第10期5卷 2334-2347页

作者： Xu liu Xuri Zhang Chaoyu Bao Zengrong Wang Heng Zhang Guoping li Ni Yan ming-jia li Gang He Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’anShaanxi Province 710049 Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’anShaanxi Province 710054 School of Materials Science and Engineering Engineering Research Center of Transportation MaterialsMinistry of EducationChang’an UniversityXi’anShaanxi Province 710064

Two-electron neutral aqueous organic redox flow batteries(AORFBs)hold more promising applications in the power grid than one-electron batteries because of their higher ***,their development is strongly limited by the structural instability of the highly reduced *** combining the extendedπ-conjugation structure of the anolytes and the enhanced aromaticity of the highly reduced species,we reported a series of highly conjugated and inexpensive arylene diimide derivatives(NDI,PDI,and TPDI)as novel two-electron storage anolyte materials for ultrastable *** with(ferrocenylmethyl)trimethylammonium chloride(FcNCl)as catholyte,arylene diimide derivative-based AORFBs showed the highest stability in two-electron AORFBs to *** NDI/FcNCl-based AORFB delivered 98.44%capacity retention at 40 mA cm^(−2)for 350 cycles;TPDI/FcNCl-based AORFB also showed remarkable stability with 97.22%capacity retention at 20 mA cm^(−2)over 200 *** finding lays the theoretical foundation and offers a reference for improving the stability of two-electron AORFBs.

关键词： energy storage organic flow battery anolyte materials arylene diimide derivatives twoelectron storage