|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 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 | Orlicz-Hardy spaces associated with operators显示文摘Let L be a linear operator in L2(Rn) and generate an analytic semigroup {e-tL}t 0 with kernel satisfying an upper bound of Poisson type, whose decay is measured by θ(L) ∈ (0, ∞). Let ω on (0, ∞) be of upper type 1 and of critical lower type p0(ω) ∈ (n/(n + θ(L)), 1] and ρ(t) = t-1/ω-1(t-1) for t ∈ (0, ∞). We introduce the Orlicz-Hardy space Hω, L(Rn) and the BMO-type space BMOρ, L(Rn) and establish the John-Nirenberg inequality for BMOρ, L(Rn) functions and the duality relation between Hω, L(Rn) and BMOρ, L*(Rn), where L* denotes the adjoint operator of L in L2(Rn). Using this duality relation, we further obtain the ρ-Carleson measure characterization of BMOρ, L*(Rn) and the molecular characterization of Hω, L(Rn); the latter is used to establish the boundedness of the generalized fractional operator Lρ- γfrom Hω, L(Rn) to HL1(Rn) or Lq(Rn) with certain q > 1, where HL1(Rn) is the Hardy space introduced by Auscher, Duong and McIntosh. These results generalize the existing results by taking ω(t) = tp for t ∈ (0, ∞) and p ∈ (n/(n + θ(L)), 1]. | JIANG RenJin YANG DaChun ZHOU Yuan | 2009 | Science China Mathematics2009，52，5： | 10 |
| 3 | Hypodermin A, a potential agent for prevention of allogeneic acute rejection显示文摘 | Quangang Chen Renjin Chen Jing Liu Honghua Yuan Peng Liu Ankang Hu Lianlian Wu Liurong Fang Shaobo Xiao Xiaorong Zhu | 2015 | Transplant Immunology2015，，3： | 1 |
| 4 | Fuzzy Assessment Method and Its Application to Selecting Project Managers显示文摘Open competition is a new form of the assessment of candidates and selection of project managers. This has many merits compared to the traditional administrative method of appointment. This article introduces a method of fuzzy assessment of project manager candidates. Fuzzy assessment unifies objective qualitative and quantitative appraisal and can be used for improving decision-making in the selection process. | Sun Renjin Wang Zhigang Wang Li | 2006 | Petroleum Science2006，3，4： | 1 |
| 5 | Generalized Vanishing Mean Oscillation Spaces Associated with Divergence Form Elliptic Operators显示文摘 | Renjin Jiang Dachun Yang | 2010 | Integral Equations and Operator Theory2010，，1： | 1 |
| 6 | TRAP-array: adiskarrayarchitecmreprovidingtimelyrecoverytoanypoint-in-time 显示文摘 | YangQing XiaoWeijun RenJin | 2006 | Computer Architecture News2006，34，2： | 1 |
| 7 | 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 |
| 8 | Separation process study of liquid phase catalytic exchange reaction based on the Pt/C/PTFE catalysts显示文摘The liquid phase catalytic exchange(LPCE) reaction is an effective process for heavy water detritiation and production of deuterium-depleted potable water. In the current study, hydrophobic carbon-supported platinum catalysts(Pt/C/PTFE) with high efficiency as reported previously for LPCE were prepared and comprehensive performance evaluation method is applied to evaluate the separation behaviors of LPCE systematically. Experimental results indicate that the optimum reaction temperature of 60–80℃ and the molar feed ratio G/L of 1.5–2.5 would lead to higher separation efficiencies. As to the packing method, a random packing mode with a packing ratio of hydrophobic catalysts 0.25 is recommended. In addition, thermodynamic analysis corresponds well with experimental results under lower temperature and G/L, while the suppression of kinetic factors should not be neglected when T > 80℃ and G/L > 1.5. | Peilong Li Li Guo Renjin Xiong Junhong Luo Ming Wen Yong Yao Zhi Zhang Jiangfeng Song Yan Shi Tao Tang | 2019 | Chinese Journal of Chemical Engineering2019，27，8： | 0 |
| 9 | Dirichlet problem for Schrodinger equation with the boundary value in the BMO space显示文摘Let(X,d,μ)be a metric measure space satisfying a Q-doubling condition(Q>1)and an L^(2)-Poincaréinequality.Let L=L+V be a Schrödinger operator on X,where L is a non-negative operator generalized by a Dirichlet form,and V is a non-negative Muckenhoupt weight that satisfies a reverse Hölder condition RH_(q) for some q≥(Q+1)/2.We show that a solution to(L−∂_(t)^(2))u=0 on X×R_(+) satisfies the Carleson condition,sup_(B(xB,rB))1/μ(B(xB,rB))∫_(0)^(rB)∫_(B(xB,rB))|t∇u(x,t)|^(2)dμdt/t<∞if and only if u can be represented as the Poisson integral of the Schrodinger operator L with the tracein the BMO(bounded mean oscillation)space associated with L. | Renjin Jiang Bo Li | 2022 | Science China Mathematics2022，65，7： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员