International Communications in Heat and Mass Transfer最新文献

{"title":"Nanoscale boiling and bubble dynamics of R152a/R1234ze(E) blends: Insights from molecular dynamics simulations","authors":"Md. Aminul Islam,&nbsp;Sheikh Mohammad Shavik,&nbsp;Mohammad Nasim Hasan","doi":"10.1016/j.icheatmasstransfer.2025.109773","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109773","url":null,"abstract":"<div><div>Phase change characteristics of refrigerant blends is essential due to their wide applications and environmental relevance. This work investigates nanoscale boiling in R152a/R1234ze(E) blends using non-equilibrium molecular dynamics (NEMD) simulations under controlled heating (80–200 K/ns). Five compositions (0 %, 33 %, 50 %, 67 %, and 100 % R152a) are analyzed in a three-phase domain comprising liquid and vapor over a platinum wall with linearly increasing temperature to induce necessary phase change. Key characteristics—atomic kinetics, net evaporation, wall heat flux, bubble nucleation/growth, and near-wall temperature—are examined across blend ratios and heating conditions. Increasing R152a enhances boiling performance with a significant change in boiling mode. Significant enhancement in net evaporation number, bubble volume growth rate and time-average heat flux is noticed with the increase in R152a for all heating rates. However, blend of 67 % R152a demonstrates thermal performance comparable to pure R152a at low as well as high heating rates, but lags at moderate rates. Interfacial analysis shows the interfacial thermal resistance of R1234ze(E) is approximately 34 % lower than that of R152a although the bulk thermal resistance of R1234ze(E) is higher. Moreover, increase in R152a in the refrigerant blend enhanced its interfacial thermal resistance. This contrast enables optimal heat transfer in mixed compositions. Specifically, the 67 % R152a blend benefits from favorable molecular distribution, balancing interfacial and bulk transport properties for improved phase change behavior. These findings provide insights into tuning refrigerant blends for efficient heat transfer in nanoscale boiling systems.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109773"},"PeriodicalIF":6.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical thermo-mechanical modeling of tread braking systems under ultra-long downhill constant-speed conditions with coupled time-dependent heat partition coefficients","authors":"Jinyu Zhang ,&nbsp;Jianyong Zuo","doi":"10.1016/j.icheatmasstransfer.2025.109713","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109713","url":null,"abstract":"<div><div>During constant-speed braking of freight trains on long downhill ramps, friction between the wheel and brake shoe generates significant thermal loads, causing the tread temperature to rise continuously. This leads to microstructural evolution, thermally induced residual stresses, and various surface damages, thereby posing serious risks to operational safety. The heat partition coefficient is a critical parameter that governs the distribution of frictional heat flux between the wheel and brake shoe, directly influencing temperature evolution, thermal stress fields, and fatigue damage predictions. However, existing numerical methods typically simplify this coefficient as a constant, neglecting its temperature-dependent, dynamically evolving nature, which limits their ability to accurately capture the true heat flux distribution during prolonged braking. To address this issue, this study proposes a thermo-mechanical coupled numerical modeling framework for wheel–brake shoe systems under ultra-long downhill (50 km) constant-speed braking conditions, developed through secondary programming in Matlab and Ansys APDL. The model incorporates the temperature-dependent thermal properties of the wheel and brake shoe and couples a time-varying heat partition algorithm to assess its impact on the evolution of tread temperature and thermal stress. Simulation results reveal that the heat partition coefficient initially increases, then decreases, and eventually fluctuates around a nearly constant value. The maximum variation amplitude is only 0.004 % for high-friction composite brake shoes, whereas it reaches 0.517 % for cast iron shoes due to their higher sensitivity to temperature-dependent thermal properties. Although the coefficient theoretically evolves dynamically with temperature, during long-duration braking, limited variations in thermal diffusivity restrict changes in heat flux distribution, making its overall impact on temperature and thermal stress predictions negligible. These findings indicate that assuming a constant heat partition coefficient can maintain modeling accuracy while improving computational efficiency under ultra-long ramp constant-speed braking conditions. Nonetheless, dynamic characteristics should be considered for materials with strongly temperature-sensitive thermal properties. The proposed modeling framework is also applicable to other braking components, such as brake discs, providing a theoretical basis and numerical tool for investigating frictional heat generation mechanisms, thermal stress prediction, and safety assessment in freight train braking systems.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109713"},"PeriodicalIF":6.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lattice Boltzmann modeling of interfacial mass transfer: Mass accommodation coefficient in liquid–vapor phase change","authors":"Naiqian Zhang ,&nbsp;Shuai Gong ,&nbsp;Zhiheng Hu ,&nbsp;Chaoyang Zhang ,&nbsp;Ping Cheng","doi":"10.1016/j.icheatmasstransfer.2025.109769","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109769","url":null,"abstract":"<div><div>The Schrage equation has been extensively used to calculate the interfacial heat/mass transfer rate during liquid–vapor phase change processes including boiling, evaporation and condensation. A critical parameter in this equation is the mass accommodation coefficient (MAC). We demonstrate that as device miniaturization progresses, the interfacial evaporation thermal resistance becomes increasingly significant, making MAC a key factor in determining the overall heat transfer performance. Using a mesoscopic approach for nano−/microscale liquid–vapor phase change heat transfer, we determine MAC values for pentane, water and hydrofluoroether-7100 (HFE-7100) under diverse conditions. Our results demonstrate a remarkable consistency between MAC values obtained from temperature-driven and pressure-driven phase transitions, indicating that the MAC is unaffected by the phase change driving forces. Furthermore, we show that while disjoining pressure suppresses evaporation by reducing the equilibrium vapor pressure, it has no discernible effect on the MAC value itself. Based on MAC values determined by our approach, we predict heat transfer performance of the porous wick and identify the optimal porosity that maximizes the overall heat transfer coefficient. This study provides an effective tool for predicting the MAC and interfacial transport rates in various liquid–vapor phase change phenomena, which are widely used in thermal management of high-heat-flux electronics.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109769"},"PeriodicalIF":6.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metastable water behavior in narrow carbon nanochannel","authors":"Zhenyu Liu,&nbsp;Yueqi Zhao,&nbsp;Runkeng Liu,&nbsp;Huiying Wu","doi":"10.1016/j.icheatmasstransfer.2025.109772","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109772","url":null,"abstract":"<div><div>The water in confined space is still one unclear issue due to the limitations of experimental technique. In this work, the metadynamics (MetaD) simulation method was used to systematically investigate the water behavior confined in hydrophobic nanochannel (carbon nanotube, CNT and carbon nanocone, CNC). We find the phase transition of water is more susceptible to occurring in carbon channel compared to that between graphene plates. The water under hydrophobic nanoconfinement becomes metastable due to the competition between bulk and surface energy, which will lead to a cavitation as the channel size continues decreasing. It shows there exits one critical diameter, under which the water prefers to spontaneously cavitate in CNT. As the apex angle of CNC increases, its tendency varies from being wet to being dry caused by the different dewetting free energy cost. Due to the influence of water thermal motion, as the CNT operating temperature increase, CNT is more inclined to be wet accordingly. The findings in this work can contribute to the understanding of metastable water behavior in hydrophobic nanochannel and the design of innovative CNT/CNC device.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109772"},"PeriodicalIF":6.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review of the impacts of the microchannel structure on the heat transfer performance of microchannel heat exchangers","authors":"Guanping Dong ,&nbsp;Caibao Huang ,&nbsp;Dedao Wu ,&nbsp;Sai Liu ,&nbsp;Nanshou Wu ,&nbsp;Pingnan Huang ,&nbsp;Hao Feng ,&nbsp;Xiangyu Kong ,&nbsp;Zixi Wang","doi":"10.1016/j.icheatmasstransfer.2025.109806","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109806","url":null,"abstract":"<div><div>Microchannel heat exchangers have compact structure and very high heat transfer performance, making them a key technology addressing the heat dissipation challenges of high-power-density electronic devices. It has been shown that the optimization of the geometry of microchannels allows to increase the convective heat transfer coefficient during heat transfer, and to enhance the uniformity of the flow field distribution. However, the increase of the heat transfer performance often comes at the expense of high pressure drop and manufacturing costs. Performing coordinated optimization of heat transfer efficiency, flow resistance, and economic benefits has become a key challenge. Thus, this paper reviews the impacts of the microchannel geometry and surface roughness on the heat transfer performance, and explores the progress of the studies on biomimetic and composite microchannels for heat transfer enhancement. It also reviews the emerging applications of intelligent design methods to the performance prediction and multi-objective optimization, such as machine learning. Finally, it summarizes the existing studies and future development trends of high-performance microchannel heat exchangers. This paper provides a theoretical reference for the design of next-generation high-efficiency, low-resistance, and high-reliability thermal management systems.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109806"},"PeriodicalIF":6.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coherent structure and heat transfer analysis of radial single/dual-stages nozzle vortex cooling at the leading edge of gas turbine blades","authors":"Xiaodong Wang,&nbsp;Chang Liu,&nbsp;Qixuan Dong,&nbsp;Jingyi Zhao,&nbsp;Canlong Lai,&nbsp;Jiayu Lin,&nbsp;Jie Ji,&nbsp;Minghou Liu","doi":"10.1016/j.icheatmasstransfer.2025.109729","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109729","url":null,"abstract":"<div><div>The design of an effective leading-edge cooling system is of paramount importance for the gas turbine. In this study, a radial dual-stage nozzle vortex cooling (RDNVC) system is proposed and its coherent structures and their effect on heat transfer are numerically studied using LES at <em>Re</em> = 10,000 and compared with radial single-stage nozzle vortex cooling (RSNVC). The findings reveal that the heat transfer performance of RDNVC is superior to that of RSNVC, with both structures exhibiting high local Nusselt numbers (<em>Nu</em>) concentrated at the nozzle exit. Inside the vortex tube, there are four special vortices, and the flow is found to be strongly rotational with weak helical feature. Due to shear effects, RSNVC has an approximately anti-symmetric vortex shedding structure at the tangential inlet with a frequency of 718 Hz, while RDNVC having a spanwise vortex structure at the tangential inlet with a frequency of 2850 Hz. The precessing vortex core (PVC) frequencies of RSNVC and RDNVC are 50.79 Hz and 81.30 Hz, respectively. PVC induces two fluctuating temperature opposite vortices, forming a large-scale heat transfer structure inside the tube. Due to the Kelvin-Helmholtz instability caused by shear between two tangential jet, RDNVC has a higher radial turbulent heat flux.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109729"},"PeriodicalIF":6.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solidification microstructure control of homogeneous and fine-grained FeCrAl alloy tube based on hypergravity casting","authors":"Di Zhang ,&nbsp;Chi Zhang ,&nbsp;Guo-Huai Liu ,&nbsp;Zhao-Dong Wang","doi":"10.1016/j.icheatmasstransfer.2025.109790","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109790","url":null,"abstract":"<div><div>FeCrAl alloys exhibit exceptional high-temperature resistance to oxidation and corrosion resistance, which makes them widely applicable as cladding materials in nuclear reactors. As-cast FeCrAl alloys are prepared by electric arc melting or vacuum induction melting. However, these conventional melting methods often result in coarse grains, with large columnar grains forming along the cooling direction, leading to anisotropic properties and difficulties in subsequent processing and forming. To address these issues, a novel solidification-controlled hypergravity casting method has been proposed. By introducing it innovatively in the preparation of FeCrAl alloys, a structure with a high proportion of equiaxed grains and good mechanical properties was successfully obtained without altering the chemical composition or introducing secondary phase strengthening. Furthermore, Procast numerical simulation was employed to systematically reveal the intrinsic relationships between melt flow, heat transfer, temperature field variations, and microstructure evolution. Experimental results indicate that the FeCrAl alloy optimized using the proposed method exhibits a finer and more uniform microstructure, with a 111 % increase in plasticity and a 14.85 % increase in tensile strength compared to the vertical centrifugal casting process. These results deepen the understanding of the properties of as-cast FeCrAl alloys and provide a solid theoretical basis for practical engineering applications.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109790"},"PeriodicalIF":6.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneous efficacy of thermal and biological factors on thermo-bio-convection of nano-encapsulated phase change materials and oxytactic microorganisms: Analysis utilizing machine learning technique","authors":"M. Sadeghi ,&nbsp;Tahar Tayebi ,&nbsp;Rifaqat Ali","doi":"10.1016/j.icheatmasstransfer.2025.109754","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109754","url":null,"abstract":"<div><div>Thermo-bioconvection is a state-of-the-art type of bioconvection that merges biological and thermal factors which would have many applications in biological waste processing, biomedical engineering, thermal energy storage, and bioreactor design. This article proposes a novel type of NEPCMs containing both nanoparticles and motile (oxytactic) microorganisms to study thermo-bioconvection flow in an inclined C-shaped enclosure with a corrugated wavy heater. Governing differential equations are solved via the finite element method. An ANN-based MLP is developed using 101 datasets, with 15 % for validation, 70 % for training, and 15 % for testing. The model, trained with the Levenberg–Marquardt algorithm, uses input parameters to predict the average Nusselt (<em>Nu</em>_<em>ave</em>) and Sherwood (<em>Sh</em>_<em>ave</em>) numbers. Results show that heat and mass transport rates are enhanced by increasing Rayleigh (<em>Ra</em>), bio-convection Rayleigh (<em>Ra</em>_<em>b</em>), and Peclet (<em>Pe</em>). With increasing <em>Le</em>, the <em>Nu</em>_<em>ave</em> decreases slightly, while the <em>Sh</em>_<em>ave</em> increases significantly. A more homogeneous distribution of microorganisms occurs at higher <em>Pe</em> and <em>Le</em>, and lower <em>Ra</em>_<em>b</em>. The optimal heat and mass transfer rates were obtained at inclination angle <em>δ</em> = 90°. Findings also show that the implemented neural network can accurately predict the average Sherwood and Nusselt numbers.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109754"},"PeriodicalIF":6.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mass transfer intensification in laminar flow using wall-mounted ribs: A CFD and experimental study","authors":"Amany Ahmed Baday ,&nbsp;Yehia M.S. El-Shazly ,&nbsp;Shaaban Attia Nosier ,&nbsp;Mohamed Helmy Abdel-Aziz","doi":"10.1016/j.icheatmasstransfer.2025.109792","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109792","url":null,"abstract":"<div><div>This study investigates the enhancement of mass transfer in laminar duct flow using wall-mounted ribs acting as turbulence promoters. Three rib geometries, semicircular, triangular, and rectangular, were evaluated under varying flow velocities using computational fluid dynamics (CFD). Multiple models (laminar, low-<em>Re</em> k-ε, k-ω SST, and Spalart–Allmaras) were tested to simulate flow separation and near-wall behavior. To validate the CFD predictions, an experimental setup employing the diffusion-controlled dissolution of copper in acidified dichromate was used. The Spalart–Allmaras model showed the best agreement with experimental results for triangular and rectangular ribs, while the laminar model was more accurate for the semicircular case. Results revealed that triangular ribs provided the highest mass transfer enhancement, followed by rectangular and semicircular ribs. Dimensionless correlations were developed for the Sherwood number as a function of Reynolds number, rib geometry, and pitch, offering useful tools for improved design and optimization of ducts, membrane systems, and process equipment where efficient mass transfer is critical.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109792"},"PeriodicalIF":6.4,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-performance Bi-doped SnS thin films: A route to enhanced thermoelectric power for miniaturized devices","authors":"Jabir Hakami ,&nbsp;Arslan Ashfaq ,&nbsp;A.R. Abd-Elwahed ,&nbsp;M.D. Alshahrani ,&nbsp;Elsammani Ali Shokralla ,&nbsp;Islam Ragab ,&nbsp;Jack Arayro ,&nbsp;Rasmiah S. Almufarij ,&nbsp;Mohamed Abdelsabour Fahmy ,&nbsp;H.H. Somaily","doi":"10.1016/j.icheatmasstransfer.2025.109759","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109759","url":null,"abstract":"<div><div>This study investigates the thermoelectric performance of bismuth (Bi)-doped tin sulfide (SnS) thin films synthesized via thermal evaporation. The pure SnS films exhibited limited thermoelectric efficiency due to low charge carrier concentration and electrical conductivity. To overcome this, Bi was incorporated into the SnS lattice at varying doping concentrations (0.1 %–0.3 %), leading to notable improvements in charge carrier concentration, Seebeck coefficient, and power factor. The SnS film doped with 0.1 % Bi exhibited a maximum Seebeck coefficient of −249.5 μV/K at 450 K. The highest thermoelectric power factor of 4.42 μW cm⁻¹ K⁻² was achieved for the 0.3 % Bi-doped film at 450 K, resulting from an optimized balance between electrical conductivity (42.5 S/cm) and a stable Seebeck coefficient (−214 μV/K). X-ray diffraction (XRD) confirmed the phase purity and successful Bi incorporation without secondary phase formation, while scanning electron microscopy (SEM) revealed the evolution of nano-wedge-shaped grains with increasing Bi content. Energy-dispersive X-ray spectroscopy (EDS) verified the elemental composition and uniform Bi distribution, and Hall effect measurements provided insights into the carrier mobility and concentration. These results demonstrate that low-concentration Bi doping effectively enhances the thermoelectric performance of SnS thin films and offers a promising route for developing efficient thin-film thermoelectric materials.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"169 ","pages":"Article 109759"},"PeriodicalIF":6.4,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}