作者机构：
[Li, ZY; Li, Zhenye; Zou, Chuankai; Yang, Kaihang; Kang, Xiaomin; She, Luobin] Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.;[Li, ZY; Li, Zhenye; Chen, Lin; Tang, Jing] Hunan Dahe New Mat Co Ltd, Hengyang 421001, Peoples R China.
通讯机构：
[Li, ZY ] U;Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.;Hunan Dahe New Mat Co Ltd, Hengyang 421001, Peoples R China.
关键词：
all-polymer solar cells;crystallinity;nanoparticle dopant;phase separation;transition-metal phosphorus trichalcogenides
摘要：
All-polymer solar cells (all-PSCs) demonstrate splendid advantages of thermal and mechanical stability. Nevertheless, the rock-ribbed trade-off between the crystallinity and phase separation scale of donor/acceptor (D/A) hinder the power conversion efficiency (PCE) improvement of all-PSCs. Here, a novel two-dimensional transition-metal phosphorus trichalcogenides (TMPTCs) namely Cd0.85PS3Li0.3 is intelligently designed and synthesized, and firstly employed as a nanoparticle dopant for PBDB-T:N2200-based all-PSCs. The two-dimensional Cd0.85PS3Li0.3 possess enormous surface area that can serve as the nucleation center, inducing the crystallinity of D/A without influencing the original phase separation. Such feature significantly boosted the charge transport, PCE (from 7.18% to 8.79%) and stability of PBDB-T:N2200-based device. Moreover, the Cd0.85PS3Li0.3 nanoparticle dopant was proved to be universal in non-fullerene small molecule acceptor (NFSMA)-based organic solar cells (OSCs), for which the PCE was boosted from 15.05% to 17.27% for PM6:L8-BO-based OSCs and from 17.29% to 19.10% for D18:L8-BO-based OSCs. These observations exemplify the significance of two-dimensional TMPTCs nanoparticle dopant as a tool for breaking the rock-ribbed trade-off between the crystallinity and phase separation scale of D/A in OSCs, which may open up a special field for making two-dimensional TMPTCs work in a unprecedented way in OSCs. Cd0.85PS3Li0.3 was added to active layer to break the trade-off between the crystallinity and phase separation of donor/acceptor, thus boosting the charge transport and power conversion efficiency of heterosystematic organic solar cellsallinity of donor/acceptor (D/A) without influencing the original phase separation, increase the charge transport of the PBDB-T:N2200 device, thus effectively restraining the charge recombination of the device. As a result, the power conversion efficiency (PCE) was boosted from 7.18% to 8.79%, for organic solar cells (OSCs) based on PBDB-T:N2200, from 15.05% to 17.27% for OSCs based on PM6:L8-BO and from 17.29% to 19.10% for OSCs based on D18:L8-BO.image (c) 2024 WILEY-VCH GmbH
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects,2024年680:132731 ISSN：0927-7757
通讯作者：
Qian, L;Kang, XM
作者机构：
[Yu, Miao] Sichuan Univ, Sch Mech Engn, Chengdu 610065, Peoples R China.;[Qian, Lu; Qian, L] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China.;[Kang, Xiaomin] Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Kang, XM ] U;[Qian, L ] S;South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China.;Univ South China, Sch Mech Engn, Hengyang 421001, Peoples R China.
关键词：
Ion -specific effects;PEG;Single -molecule force spectroscopy;Quartz crystal microbalance with dissipation;H -bonds;Polymer -water interactions
摘要：
Understanding the intricate interplay between ions and polymers holds key implications for a myriad of fields, from biomedicine to materials science. Here, we present a comprehensive investigation of ion-specific effects on the behavior of single polyethylene glycol (PEG) chains, a versatile polymer widely used in various applications. Employing single-molecule force spectroscopy (SMFS) and quartz crystal microbalance with dissipation (QCM-D) techniques, we systematically explore the impact of different monovalent cations on structural and hydration dynamics of PEG, Surprisingly, our results demonstrate a non-linear ion-specific influence on the hydration of PEG chains. The introduction of ions significantly affects the binding water content and the single-chain elastic behavior of PEG. Intriguingly, monovalent cations display an intriguing concave relationship between their size and the extent of water binding. Li+ and Na+, characterized by their smaller size and higher charge density, induce pronounced hydration, thus altering the overall structural properties of PEG chains. In contrast, larger cations like Rb+ and Cs+ facilitate chain extension, while concurrently promoting the formation of binding water. Our findings offer a fresh perspective on the role of ion size and charge density in governing polymer-water interactions. Moreover, through quantitative analysis utilizing QCM data, we verify the intricate influence of ions on PEG chains. Our research contributes to unraveling the complex interplay between ions and polymers, highlighting the importance of ion-specific effects in shaping polymer behavior. While shedding light on the potential of polymer materials with tailored properties, it also underscores the need for further investigations into the mechanisms underlying ion-specific effects and their broader implications.
作者机构：
[Gao, Kang; Yi, Junhao; Zhang, Yun] Hunan Univ Sci & Technol, Sch Mech Engn, Xiangtan 411201, Peoples R China.;[Dong, Fang] Cent South Univ, Light Alloy Res Inst, State Key Lab Precis Mfg Extreme Serv Performance, Changsha 410083, Peoples R China.;[Chen, Pinghu; Chen, PH] Univ South China, Coll Mech Engn, Key Lab Hunan Prov Equipment Safety Serv Technol E, Hengyang 421001, Peoples R China.
通讯机构：
[Chen, PH ] U;Univ South China, Coll Mech Engn, Key Lab Hunan Prov Equipment Safety Serv Technol E, Hengyang 421001, Peoples R China.
关键词：
titanium and titanium alloys;surface treatment;classification of titanium alloys
摘要：
Titanium alloys are acclaimed for their remarkable biocompatibility, high specific strength, excellent corrosion resistance, and stable performance in high and low temperatures. These characteristics render them invaluable in a multitude of sectors, including biomedicine, shipbuilding, aerospace, and daily life. According to the different phases, the alloys can be broadly categorized into alpha-titanium and beta-titanium, and these alloys demonstrate unique properties shaped by their respective phases. The hexagonal close-packed structure of alpha-titanium alloys is notably associated with superior high-temperature creep resistance but limited plasticity. Conversely, the body-centered cubic structure of beta-titanium alloys contributes to enhanced slip and greater plasticity. To optimize these alloys for specific industrial applications, alloy strengthening is often necessary to meet diverse environmental and operational demands. The impact of various processing techniques on the microstructure and metal characteristics of titanium alloys is reviewed and discussed in this research. This article systematically analyzes the effects of machining, shot peening, and surface heat treatment methods, including surface quenching, carburizing, and nitriding, on the structure and characteristics of titanium alloys. This research is arranged and categorized into three categories based on the methods of processing and treatment: general heat treatment, thermochemical treatment, and machining. The results of a large number of studies show that surface treatment can significantly improve the hardness and friction mechanical properties of titanium alloys. At present, a single treatment method is often insufficient. Therefore, composite treatment methods combining multiple treatment techniques are expected to be more widely used in the future. The authors provide an overview of titanium alloy modification methods in recent years with the aim of assisting and promoting further research in the very important and promising direction of multi-technology composite treatment.
通讯机构：
[Tang, DW ] U;Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.
摘要：
Carbon/polymer-based flexible electrothermal films, as a Joule heating material with excellent electrothermal properties, good formability, and lightweight, are a very needed material in aircraft wing de-icing systems, flexible electric heating elements, and low-voltage wearable devices. In this study, a series of flexible electrically heated films were successfully prepared using polyimide (PI) as the film-forming substrate and graphene (GE) as the conductive filler. The effects of graphene content on the morphology, microstructure, and electrothermal properties, as well as the mechanical flexibility of the electrothermal films, were systematically investigated. The results showed that the GE/PI electrothermal films not only retained the good electrical conductivity of graphene but also had the excellent mechanical properties and high heat resistance of polyimide. The electric heating film with the addition of 8 wt. % GE can quickly reach 390 C-degrees at 24 V with uniform temperature distribution, and the mass loss at 500 C-degrees is only 0.98 wt. %. A wide range of applications exist in fields such as flexible electric heating elements.
摘要：
This study proposes a piecewise high-order differential interpolation method with rapid convergence to construct an ultrasmooth high-speed cam profile. The proposed method enables a solution to be realized to manipulate the dynamic performance of a cam profile with C3 continuity during the whole working process. The reconstruction characteristics of the cam profile by the high-order differential interpolation method are compared with the most commonly used linear profile interpolation strategy. Thus, the proposed piecewise high-order differential interpolation method is validated as a feasible and effective methodology to design and reconstruct an ultrasmooth cam profile.
摘要：
This study investigates the dissolution and diffusion of H atom in TiCrTaV of two body-centered cubic (BCC) high-entropy alloys and their effects on the mechanical properties and electronic structure of the alloys by first-principles calculations. Results show that the solution energy of H atom and local lattice distortion vary depending on the local environment. Meanwhile, the site occupancy of H atoms in tetrahedral interstitials are slightly advantageous in the two structures. Diffusion of H also presents a sluggish effect. The dramatic increases and decreases of diffusion barrier disrupted the periodicity and symmetry of H diffusion in the two BCC structures, thereby slowing down the H accumulation. After hydrogenation, TiCrTaV high-entropy alloys (HEAs) still maintain resistance to deformation, indicating that they are the potential candidate structural materials for fusion reactors. Our investigation indicates that this low-activation HEA may exhibit promising irradiation resistance due to its special H behavior.
作者机构：
[Liu, Jianwen; Luo, Jing-Li; Guo, Ying; Fu, Guodong; Liu, JW; Wang, Lei; Luo, JL; Fu, Xian-Zhu] Shenzhen Univ, Coll Mat Sci & Engn, Guangdong Res Ctr Interfacial Engn Funct Mat, Shenzhen Key Lab Energy Electrocatalyt Mat, Shenzhen 518060, Peoples R China.;[Kang, Xiaomin] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China.;[Zhang, Yan] Shenzhen Bay Lab, Pingshan Translat Med Ctr, Shenzhen 518055, Guangdong, Peoples R China.;[Li, Zhiwei] Natl Supercomp Ctr Shenzhen, Shenzhen 518055, Peoples R China.;[Zhang, Jiujun] Fuzhou Univ, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China.
通讯机构：
[Liu, JW; Luo, JL ; Fu, XZ] S;Shenzhen Univ, Coll Mat Sci & Engn, Guangdong Res Ctr Interfacial Engn Funct Mat, Shenzhen Key Lab Energy Electrocatalyt Mat, Shenzhen 518060, Peoples R China.
摘要：
The non-classical anodic H2 production from 5-hydroxymethylfurfural (HMF) is very appealing for energy-saving H2 production with value-added chemical conversion due to the low working potential (~0.1 V vs RHE). However, the reaction mechanism is still not clear due to the lack of direct evidence for the critical intermediates. Herein, the detailed mechanisms are explored in-depth using in situ Raman and Infrared spectroscopy, isotope tracking, and density functional theory calculations. The HMF is observed to form two unique inter-convertible gem-diol intermediates in an alkaline medium: 5-(Dihydroxymethyl)furan-2-methanol anion (DHMFM−) and dianion (DHMFM2−). The DHMFM2− is easily oxidized to produce H2 via H− transfer, whereas the DHMFM− is readily oxidized to produce H2O via H+ transfer. The increases in potential considerably facilitate the DHMFM− oxidation rate, shifting the DHMFM− ↔ DHMFM2− equilibrium towards DHMFM− and therefore diminishing anodic H2 production until it terminates. This work captures the critical intermediate DHMFM2− leading to hydrogen production from aldehyde, unraveling a key point for designing higher performing systems. The detailed mechanism of anodic H2 production from aldehydes remains unclear. Here, authors identify two key interconvertible intermediates of 5-hydroxymethylfurfural oxidation in alkaline medium, finding H2 production via hydride transfer from one of the intermediates.
关键词：
Aluminum-air batteries;Direct methanol fuel cells;Hierarchical hollow structure;N, S dual-coordinated Fe single-atoms catalysts;Oxygen reduction reaction
摘要：
Fe-, and N-co-doped carbon (FeNC) electrocatalysts are promising alternatives to Pt-based catalysts for oxygen reduction reaction (ORR); however, simultaneously enhancing their intrinsic activity and exposure of Fe active sites remains challenging. Herein, we report S-modified Fe single-atom catalysts (SACs) anchored on N,S-co-doped hollow porous nanocarbon (Fe/NS-C) for ORR. The unique hollow structure and large surface area of the SACs are favorable for mass/electron transport and exposure of Fe single-atom active sites. The as-prepared Fe/NS-C electrocatalysts display a high-efficiency ORR activity with a half-wave potential of 0.893V versus the reversible hydrogen electrode and exceed that of the benchmark commercial Pt/C catalyst as well as most reported transition-metal based SACs. Impressively, the Fe/NS-C-based Al-air battery (AAB) displays a high open circuit voltage of 1.48V, a maximum power density of 140.16 mW cm(-2), and satisfactory durability, outperforming commercial Pt/C-based AAB. Furthermore, Fe/NS-C exhibits considerable potential as a cathode catalyst for application in direct methanol fuel cells. Experimental and theoretical calculation results reveal that the excellent ORR performance of Fe/NS-C can be contributed to the highly active FeN(3)S sites and the unique hollow structure. This work provides new insights into the rational design and synthesis high-performance ORR electrocatalysts for energy conversion and storage devices. of employing ZIF-8 as precursors.
摘要：
Kaolin was utilized as a raw material for geopolymers with various Si/Al ratios, and a hydrothermal-microwave treatment was proposed to obtain Cs-containing ceramics to immobilize Cs-137. The results show that with Si/Al from 1/1 to 3/1, the hydrothermal treatment will tend to produce CsAlSiO4, pollucite (CsAlSi2O6) and pollucite solid solutions, respectively. Following the hydrothermal reaction, a rapid microwave process (30 min) enhances the loose microstructure of hydrothermal products, and higher microwave temperatures promote pollucite crystallization. Cs-containing ceramics with high Cs content (31%) and low leaching rate (9.7 x 10(-4) g m(-2) d(-1)) are obtained at 800 & DEG;C with Si/Al ratio of 2/1.
摘要：
To expand the application of aluminum alloy parts fabricated by wire arc additive manufacturing (WAAM) in industries, it is crucial to reduce porosity and refine the microstructure to improve mechanical properties as pores and non-uniform microstructure are major defects. In this study, bilateral friction stir post-processing (B-FSP) was used as post-processing to the parts made by WAAM. The microstructural evolution after B-FSP deformation and the strengthening mechanisms were investigated. As compared to the conventional WAAM processing of Al-Si alloy, it was found that the introduction of B-FSP and U-FSP can effectively eliminate the pores, and both the alpha-Al dendrites and Si-rich eutectic network were severely broken up, leading to a remarkable enhancement in ductility. The WAAM parts after B-FSP exhibit an average yield strength of 78.18 MPa, an ultimate tensile strength of 135 MPa, an average hardness of 48 HV, and vertical and horizontal elongation (EL) of 28.7 and 38.4%, respectively. The anisotropy caused by non-uniform stirring is responsible for the difference in EL. Notably, unilateral friction stir post-processing (U-FSP) results in a 12.5% increase in hardness and a 65.5% increase in EL, while bilateral FSP yields a 20% increase in hardness and a 72.2% increase in El compared to plain WAAM parts. These findings provide a strong foundation and strategy for enhancing ductility, hardness, reducing porosity, and refining the microstructure of the additively manufactured aluminum alloy components.
摘要：
The commercial exploitation of the deep-sea massive deep-sea polymetallic nodules depends on the excellent tractive performance of the deep-sea tracked miner. The walking safety and trafficability of the deep-sea tracked miner are greatly influenced by the traction of the crawler with multi track shoes. The total tractions generated from the two cases of failure surface under the uniformed pressure are deduced and analyzed based on the principle of virtual power. By substituting specified parameters, the traction weakening effect of multi track shoes is discovered, and then corresponding expression is put forward and verified by comparing the tested and theoretical traction relationships based on the traction test of multi track shoes. The research results show that the height and the distance should be considered into the design in a comprehensive way because of the existence of the weakening effect. The mechanism revealing of the source of the multi track shoe tractions could help to achieve the appropriate size of the track shoe and more traction according to the different track shoe distance.
期刊：
Journal of Vibration and Control,2023年29(23-24):5725-5736 ISSN：1077-5463
通讯作者：
Qu, W;Zhang, HL
作者机构：
[Yu, Hui; Qu, Wei] Univ South China, Sch Mech Engn, 28 West Changsheng Rd, Hengyang 421001, Peoples R China.;[Zhang, HL; Zhang, Huailiang; Li, Wei] Cent South Univ, Coll Mech & Elect Engn, Changsha 410083, Peoples R China.;[Zhang, Huailiang; Li, Wei] Cent South Univ, State Key Lab High Performance & Complex Mfg, Changsha, Peoples R China.
通讯机构：
[Zhang, HL ] C;[Qu, W ] U;Univ South China, Sch Mech Engn, 28 West Changsheng Rd, Hengyang 421001, Peoples R China.;Cent South Univ, Coll Mech & Elect Engn, Changsha 410083, Peoples R China.
关键词：
axial random vibration;fluid-structure interaction;characteristic line method;pseudo-excitation method;dynamic characteristics
摘要：
In this paper, the fluid pressure responses of the hydraulic composite pipe subjected to an axial random vibration are investigated. First, the motion equations under an axial random vibration are established, considering the fluid-structure interaction. Second, the characteristic line and the pseudo-excitation methods for random vibration are employed to solve the hydraulic composite pipe dynamic characteristics. Finally, the influence laws of the fluid velocity and pressure, the external excitation, and the structure parameters are analyzed. The results demonstrate that the analytical method is beneficial to analyze the hydraulic composite pipe subjected to an axial random vibration, which can reduce vibration and improve efficiency.
摘要：
Abstract A copper‐catalyzed direct C(sp2)−H bond aminosulfonylation of maleimides is demonstrated. This protocol enables concurrent construction of C(sp2)−N and C(sp2)−SO2 bonds in one‐step and features high efficiency, broad substrate scopes, good functional‐group tolerance, and mild reaction conditions. Preliminary mechanistic studies indicate that the reaction probably involves a radical way. Significantly, this method is applicable to synthesize derivatives of pharmaceuticals such as Desloratadine, Fluoxetine, Atomoxetine, and Maprotiline.
摘要：
In response to the lack of plasma bag-breaking equipment and time-consuming manual recovery of plasma in China, this study focuses on the distal end cutting of a plasma bag residual-input tube and designs a machine-vision-based plasma bag residual-input tube cutting system. The system comprises a plasma bag rotation device, a bottom disc, an image acquisition device, a cutting device, and a device control system. The image acquisition device captures images of the rotating plasma bag and calculates the Euclidean distance from the end of the plasma bag input-tube distal end to the outer edge of the bottom support plate and the distance from the input-tube distal end to the centerline of the plasma bag. Two distinct value acquisition algorithms are designed for the two types of input tubes. The screw slide moves accordingly. When the plasma bag is above the cutting part, the cutting part cuts the end of the residual-input tube of the plasma bag. The prototype performance tests reveal that the cutting error is within 10% of the end of the plasma bag input tube distal end, the cutting success rate is 100%, and the processing time for each bag is 2.5 s, which meets the time requirements of the plasma bag breaker.
期刊：
Chemical Engineering Journal,2023年452:139228 ISSN：1385-8947
通讯作者：
Li, Zhenye(lizhenye@usc.edu.cn)
作者机构：
[Li, Zhenye] Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.;[Ying, Lei; Peng, Feng] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China.;[Liang, Yingfang] Univ South China, Hengyang 421001, Peoples R China.;[Li, Zhenye; Chen, Lin; Chen, Jian] Hunan Dahe New Mat Co Ltd, Hengyang 421001, Peoples R China.
通讯机构：
[Zhenye Li] C;[Lei Ying] I;College of Mechanical Engineering, University of South China, Hengyang 421001, China<&wdkj&>Hunan Dahe New Materials Co., Ltd., Hengyang 421001, China<&wdkj&>Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
关键词：
All-polymer solar cells;Non-halogenated solvent;Polymer doping;Stability
期刊：
Particulate Science and Technology,2023年:19 ISSN：0272-6351
通讯作者：
Deng, R
作者机构：
[Deng, Rong; Lu, Xiaowei; Ye, Tong] Univ South China, Sch Mech Engn, Hengyang, Peoples R China.;[Deng, Rong; Deng, R] Univ South China, Sch Mech Engn, Hengyang 421000, Hunan, Peoples R China.
通讯机构：
[Deng, R ] U;Univ South China, Sch Mech Engn, Hengyang 421000, Hunan, Peoples R China.
关键词：
Fresh concrete;dEM;flowing property;JKR surface energy;rheological test
摘要：
The effect of Johnson-Kendall-Roberts (JKR) surface energy on the flowing property of fresh concrete was numerically studied. The fresh concrete was simplified into coarse aggregate and mortar, both described as the particles. The Hertz-Mindlin with JKR contact model was employed to describe the constitutive relationship of fresh concrete. The contact parameters were calibrated through experiment and numerical simulation of multiple flow tests. The impact of these contact parameters on the residual height (Hr) of fresh concrete after slumping was examined using a slump test. The significance degree of mortar-mortar contact parameters on the Hr was studied using an orthogonal test. The effect of the surface energy (gamma) on the flow index (Bm) and flow time (Tv) of fresh concrete was studied intensively based on the L-box flow and V-funnel tests. The mortar-mortar contact parameters, gamma and rolling friction coefficient (mu r), most significantly impacted the Hr. The mortar-mortar surface energy (gamma m-m) significantly impacted Bm and Tv compared to the aggregate-mortar and aggregate-aggregate surface energies ((gamma a-m) and (gamma a-a), respectively). The effect of gamma a-a, gamma a-m, and gamma m-m on Bm was interconnected. Under appropriate parametric values, the Bm was the most stable, and the workability of fresh concrete was the best. In addition, as gamma increased, Hr and Bm decreased and Tv increased. The flowability of the fresh concrete worsened.
摘要：
Purpose
The modeling cost of the gradient-enhanced kriging (GEK) method is prohibitive for high-dimensional problems. This study aims to develop an efficient modeling strategy for the GEK method.
Design/methodology/approach
A two-step tuning strategy is proposed for the construction of the GEK model. First, an auxiliary kriging is built efficiently. Then, the hyperparameter of the kriging model is served as a good initial guess to that of the GEK model, and a local optimal search is further used to explore the search space of hyperparameter to guarantee the accuracy of the GEK model. In the construction of the auxiliary kriging, the maximal information coefficient is adopted to estimate the relative magnitude of the hyperparameter, which is used to transform the high-dimension maximum likelihood estimation problem into a one-dimensional optimization. The tuning problem of the auxiliary kriging becomes independent of the dimension. Therefore, the modeling efficiency can be improved significantly.
Findings
The performance of the proposed method is studied with analytic problems ranging from 10D to 50D and an 18D aerodynamic airfoil example. It is further compared with two efficient GEK modeling methods. The empirical experiments show that the proposed model can significantly improve the modeling efficiency without sacrificing accuracy compared with other efficient modeling methods.
Originality/value
This paper developed an efficient modeling strategy for GEK and demonstrated the effectiveness of the proposed method in modeling high-dimension problems.
摘要：
The hot deformation behavior of the Al-Zn-Mg-Cu alloy was studied by isothermal tensile tests in the temperature range of 200-350 degrees C and the strain rate range of 0.001-0.1 s(-1). A data-driven deep neural network (DNN) constitutive model and a phenomenological Arrhenius constitutive model were developed for the studied alloy model. The parameters of the DNN model were optimized to improve the prediction accuracy of flow stress. The results show that the accuracy of predictions of the DNN model is better than the Arrhenius model for the hot deformation behavior of 7075 aluminum alloy. The average absolute relative error and correlation coefficient of the DNN model is 1.70 % and 0.9996, respectively. The accuracy of the constitutive model of Arrhenius is relatively low for 7075 aluminum alloy in the range 200-350 degrees C, 0.001-0.1 s(-1). The optimal network depth and the number of neurons per layer for the analytically optimized DNN constitutive model are 6 and 28, respectively. In addition, the developed DNN model can be effectively applied in intelligent manufacturing, such as short-process high-efficiency hot stamping and other plastic-forming technologies.
作者机构：
[Luo, W.; Liu, L.; Li, X. X.; Hu, B. L.; Luo, W; Liu, L; Sun, X. Y.] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Han, L. H.; Liu, L.; Liu, L] Univ South China, Sch Mech Engn, Hengyang 421000, Peoples R China.
通讯机构：
[Luo, W; Liu, L ] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;Univ South China, Sch Mech Engn, Hengyang 421000, Peoples R China.
摘要：
The management of nuclear wastes has long been a problem that hinders the sustainable and clean utilization of nuclear energy since the advent of nuclear power. These nuclear wastes include minor actinides (MAs: (237)Np, (241)Am, (243)Am, (244)Cm and (245)Cm) and long-lived fission products (LLFPs: (79)Se, (93)Zr, (99)Tc, (107)Pd, (129)I and (135)Cs), and yet are hard to be handled. In this work, we propose a scheme that can transmute almost all the MAs and LLFPs with a lead-cooled fast reactor (LFR). In this scheme, the MAs and the LLFPs are loaded to the fuel assembly and the blanket assembly for transmutation, respectively. In order to study the effect of MAs loading on the operation of the core, the neutron flux distribution, spectra, and the k(eff) are further compared with and without MAs loading. Then the LLFPs composition is optimized and the support ratio is obtained to be 1.22 for (237)Np, 1.63 for (241)Am, 1.27 for (243)Am, 1.32 for (79)Se, 1.53 for (99)Tc, 1.02 for (107)Pd, and 1.12 for (129)I, respectively, indicating that a self-sustained transmutation can be achieved. Accordingly, the transmutation rate of these nuclides was 13.07%/y for (237)Np, 15.18%/y for (241)Am, 13.34%/y for (243)Am, 0.58%/y for (79)Se, 0.92%/y for (99)Tc, 1.17%/y for (107)Pd, 0.56%/y for (129)I. Our results show that a lead-cooled fast reactor can be potentially used to manage nuclear wastes with high levels of long-lived radioactivity.
期刊：
Journal of Polymer Science,2023年61(23):3022-3038 ISSN：2642-4150
通讯作者：
Li, ZY
作者机构：
[Li, Zhenye; Ding, Xu] Univ South China, Coll Mech Engn, Hengyang, Peoples R China.;[Li, ZY; Li, Zhenye] Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Li, ZY ] U;Univ South China, Coll Mech Engn, Hengyang 421001, Peoples R China.
关键词：
morphology;stability;ternary organic solar cells
摘要：
Abstract In recent years, with the continuous development of photoactive layer material, the power conversion efficiency (PCE) of bulk heterojunction (BHJ) binary organic solar cells (BOSCs) has been significantly improved. However, it is difficult for BOSCs to maximize the effective utilization of the wide spectrum of solar energy, limiting the further improvement of PCE. Adding a third component to BOSCs that constructing ternary organic solar cells (TOSCs) is an effective method to broaden the absorption spectrum of BOSC, match the gradient energy level, and regulate the morphology of the active layer. Constructing TOSCs can not only effectively improve the device performance, but also maintain the advantages of easy‐to‐fabricate single‐junction device structures. In this review, we first introduced the basic working mechanism of TOSCs. Then based on the working mechanism, we comprehensively reviewed the latest research results of TOSCs, and analyzed the effects of the third component on the microscopic morphology of the active layer, photovoltaic performance and device stability. Finally, we systematically summarized the role of the third component in TOSCs and proposed some future development trends of TOSCs, such as designing and synthesizing more economical, green, and environmentally friendly TOSCs that towards the commercial application in the future.
