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| 1 | Design of artificial neural networks using a genetic algorithm to predict saturates of vacuum gas oil显示文摘Accurate prediction of chemical composition of vacuum gas oil(VGO) is essential for the routine operation of refi neries. In this work,a new approach for auto-design of artificial neural networks(ANN) based on a genetic algorithm(GA) is developed for predicting VGO saturates. The number of neurons in the hidden layer,the momentum and the learning rates are determined by using the genetic algorithm. The inputs for the artif icial neural networks model are f ive physical properties,namely,average boiling point,density,molecular weight,viscosity and refractive index. It is verified that the genetic algorithm could fi nd the optimal structural parameters and training parameters of ANN. In addition,an artificial neural networks model based on a genetic algorithm was tested and the results indicated that the VGO saturates can be effi ciently predicted. Compared with conventional artificial neural networks models,this approach can improve the prediction accuracy. | Dong Xiucheng Wang Shouchun Sun Renjin Zhao Suoqi | 2010 | Petroleum Science2010，7，1： | 15 |
| 2 | Thermal and elemental analysis of the combustion chamber deposits in a large-scale two-stroke marine diesel engine显示文摘It is of significance to understand the chemical content of carbon deposits in the large-scale two-stroke(LSTS) marine diesel engine because of adverse effect on the engine performance, oil consumption and emissions. In this work, two different combustion chamber deposits in an LSTS marine diesel engine were studied using thermogravimetry analysis(TGA), elemental analysis(EA) and synchrotron X-ray fluorescence(SXRF). One was on the piston top and the other on the piston land, termed PTCD and PLCD, respectively. For the PTCD sample, the 97% residue in the TGA and 1.4% carbon content in the EA indicated the main compositions of PTCD were metal salts or oxides and ashes, significantly different from the previous findings of the highest carbon content in deposits from the small four stroke engines. The different chemical content between PTCD and PLCD implied higher thermal load in the LSTS marine diesel engine led to a nearly complete thermal decomposition of PTCD. The higher calcium content in PTCD and PLCD indicated the additives of cylinder oil should be the main source of metal content of PTCD and PLCD. Calcium distribution in the SXRF results was indicative of the potential layered structure in PTCD and PLCD. In addition, the appearance of iron on the surface against the piston in PTCD and PLCD indicated iron oxides formation between carbon deposit and piston materials. | ZHANG XuSheng ZENG XiangMing SUN XiuCheng DENG Biao PENG GuanYun XIE HongLan WU ZhiJun XIAO TiQiao | 2015 | Science China(Technological Sciences)2015，58，10： | 2 |
| 3 | Effect of A1203 content on BaO - A1203 - BzO3 - SiOz glass sealant for sol- id oxide fuel eell显示文摘 | Tao Sun Hanning Xiao Wenming Guo Xiucheng Hong | 2010 | 36:821-8262010，36，： | 1 |
| 4 | Dual active sites over Cu-ZnO-ZrO_(2) catalysts for carbon dioxide hydrogenation to methanol显示文摘CO_(2) hydrogenation to methanol is a significant approach to tackle the problem of global warming and simultaneously meet the demand for the portable fuel.Cu-ZnO catalysts with various kinds of promoters have received wide attention.However,the role of promoter and the form of active sites in CO_(2) hydrogenation are still in debate.Here,various molar ratios of ZrO_(2) were added into the Cu-ZnO catalysts to tune the distributions of Cu^(0) and Cu+species.A volcano-like trend between the ratio of Cu+/(Cu++Cu^(0))and the amount of ZrO_(2) is presented,among which the CuZn10Zr(the molar ratio of ZrO_(2) is 10%)catalyst reaches the highest value.Correspondingly,the maximum value of space-time yield to methanol with 0.65 gMeOH/(gcat·hr)is obtained on CuZn10Zr at reaction conditions of 220°C and 3 MPa.Detailed characterizations demonstrate that dual active sites are proposed during CO_(2) hydrogenation over CuZn10Zr catalyst.The exposed Cu^(0) takes participate in the activation of H_(2),while on the Cu^(+) species,the intermediate of formate from the co-adsorption of CO_(2) and H_(2) prefers to be further hydrogenated to CH_(3)OH than decomposing into the by-product of CO,yielding a high selectivity of methanol. | Xiucheng Sun Yifei Jin Zaizhe Cheng Guojun Lan Xiaolong Wang Yiyang Qiu Yanjiang Wang Huazhang Liu Ying Li | 2023 | Journal of Environmental Sciences2023，，9： | 1 |
| 5 | Effect of Al 2 O 3 content on BaO–Al 2 O 3 –B 2 O 3 –SiO 2 glass sealant for solid oxide fuel cell显示文摘 | Tao Sun Hanning Xiao Wenming Guo Xiucheng Hong | 2009 | Ceramics International2009，，2： | 1 |
| 6 | How did the price and income elasticities of natural gas demand in China evolve from 1999 to 2015? The role of natural gas price reform显示文摘As a cleaner,high-efficiency,and low-carbon fuel,natural gas has been an important fuel resource for China.To achieve a substantial increase in natural gas demand,China has sought to reform its natural gas pricing mechanism.Employing a set of unbalanced panel data for China’s 30 provinces covering 1999-2015,this study aims to estimate the evolving price and income elasticities of natural gas demand and explore the effect of natural gas price reform in China.For this purpose,a series of econometric techniques allowing for cross-sectional dependence and slope homogeneity is utilized.The results suggest that although natural gas demand in China still lacks negative price elasticity,the phenomenon is improving.Moreover,the estimates suggest that natural gas demand in China is indeed becoming increasingly sensitive to income changes.Our estimates also provide strong evidence in favor of the effect of natural gas price reform on the change in price elasticity as the price elasticity decreases in five of the seven regions.In addition,the results indicate large variations in the change in price and income elasticities of natural gas demand across China’s regions.Natural gas demand is becoming more price inelastic in Southwest China and Northwest China,while such demand in North China and East China responds less sensitively to income changes.These findings offer several policy suggestions for the reform of China’s natural gas market at the national and regional levels. | Kangyin Dong Xiucheng Dong Renjin Sun | 2019 | Petroleum Science2019，16，3： | 0 |
| 7 | Digital Twin-Assisted Knowledge Distillation Framework for Heterogeneous Federated Learning显示文摘In this paper,to deal with the heterogeneity in federated learning(FL)systems,a knowledge distillation(KD)driven training framework for FL is proposed,where each user can select its neural network model on demand and distill knowledge from a big teacher model using its own private dataset.To overcome the challenge of train the big teacher model in resource limited user devices,the digital twin(DT)is exploit in the way that the teacher model can be trained at DT located in the server with enough computing resources.Then,during model distillation,each user can update the parameters of its model at either the physical entity or the digital agent.The joint problem of model selection and training offloading and resource allocation for users is formulated as a mixed integer programming(MIP)problem.To solve the problem,Q-learning and optimization are jointly used,where Q-learning selects models for users and determines whether to train locally or on the server,and optimization is used to allocate resources for users based on the output of Q-learning.Simulation results show the proposed DT-assisted KD framework and joint optimization method can significantly improve the average accuracy of users while reducing the total delay. | Xiucheng Wang Nan Cheng Longfei Ma Ruijin Sun Rong Chai Ning Lu | 2023 | China Communications2023，20，2： | 0 |
| 8 | Role of intrinsic defects on carbon adsorbent for enhanced removal of Hg^(2+)in aqueous solution显示文摘Carbon is a normally used adsorbent for removal of heavy metal ion in aqueous solutions,but the efficient adsorbent needs intensive modification by heteroatom doped or supported noble metals that cause severe pollution and easy leaching of active components during use.In this paper,the role of intrinsic defects on Hg^(2+)adsorption for carbon adsorbent was investigated.The maximum adsorbing capacity of defectrich carbon has been improved up to 433 mg·g^(-1)which is comparable to most of the modified carbon adsorbents via supported metal chloride or noble metal components.The basicity is increased with the content of defective sites and the strong chemical bonding can be formed via electron transformation between the defect sites with adsorbed Hg^(2+).The present study gives a direction to explore cheap and easily scale-up high-performance mercury adsorbents by simply tuning the intrinsic defective structure of carbon without the necessity to support metal or other organic compounds. | Liu He Yiyang Qiu Chu Yao Guojun Lan Na Li Huacong Zhou Quansheng Liu Xiucheng Sun Zaizhe Cheng Ying Li | 2023 | Chinese Journal of Chemical Engineering2023，61，9： | 0 |
| 9 | High-performance Cu/Zn O/Al_(2)O_(3) catalysts for methanol steam reforming with enhanced Cu-ZnO synergy effect via magnesium assisted strategy显示文摘Methanol steam reforming(MSR) is an attractive approach to produce hydrogen for fuel cells.Due to the limited catalyst loading volume and frequent start-ups and shut-downs on board,it is highly desired to develop an extremely active and robust catalyst.Herein,on the basis of industrial Cu/ZnO/Al_(2) O_(3) catalysts,a series of CuZnAl-xMg catalysts with enhanced Cu-ZnO synergy were synthesized via magnesium assisted strategy.The incorporation of magnesium was found to be beneficial to the enhancement of catalytic activity and stability of catalyst.A combination of complementa ry characterizations(e.g.XRD,H_(2)-TPR,N_(2) O chemisorption,TEM,XPS analysis etc.) proves that isomorphous substitution of Cu^(2+)in malachite phase gives rise to more dispersive Cu and ZnO NPs,and the increased Cu^(+)/Cu~0 ratio indicates the strengthened Cu-ZnO synergy effect,which leads to the boosted stability during the thermal treatment. | Zaizhe Cheng Wenqiang Zhou Guojun Lan Xiucheng Sun Xiaolong Wang Chuan Jiang Ying Li | 2021 | Journal of Energy Chemistry2021，30，12： | 0 |
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