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Inhomogeneous Shadowing Effect in High-Energy p-A Drell-Yan Process:

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Communications in Theoretical Physics 2008年第7期50卷 175-179页

作者： WANG Hong-Min SUN Xian-Jing zhang ben-ai Physics Department Academy of Armored Forces Engineering of PLA Beijing 100072 China Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100049 China Institute of Applied Physics and Computational Mathematics Beijing 100088 China

Having studied the initial state energy loss versus nuclear shadowing for the Drell-Yan dimuon pairproduction in the color string model,the inhomogeneous shadowing effect is considered in this *** find thatthe inhomogeneous shadowing effect does amend the rate of energy loss per unit path length,-dE/***,thetheoretical results for the Drell-Yan differential cross-section ratios are compared with the E772 and E866 *** isfound that the theoretical results are in good agreement with the experimental data.

关键词： inhomogeneous shadowing effect color string model Drell Yan process

Nuclear Effect Study Under K Factor's Nonconstancy

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Communications in Theoretical Physics 2002年第7期38卷 59-64页

作者： HOU Zhao-Yu WU Wen-Wang HE Ming-Zhong zhang ben-ai Department of Physics Shijiazhuang Normal College Shijiazhuang 050801 China Graduate School the Chinese Academy of Engineering Physics Beijing 100088 China Department of Mathematics and Physics Shijiazhuang Railway College Shijiazhuang 050043 China Department of Electronics Hebei Normal University Shijiazhuang 050016 China Graduate School the Chinese Academy of Engineering Physics Beijing 100088 China

A consistent approach to estimating nuclear effect functions RA RvA (x2) and RSA(x2) based on numerical iteration technique is presented in the quark-parton model when taking into account the nonconstancy of quantum chromodynamics correction factor K. ARv (x2) and RsA(x2) correspond respectively to the valence quark distributions for one bound nucleon within the nucleus and to the sea quark ones. Related numerical analysis is given for nuclei 6 12C,20 40Ca, and 26 56Fe. As the basis, it adopts both experimental data of the high energy proton-nucleus Drell-Yan process and of the high energy lepton-nucleus deep inelastic scattering.

关键词： K-factor, Drell-Yan process, deep inelastic scattering, nuclear parton distribution

Effect of Resonant Photoionization in Non-Local Thermodynamical Equilibrium Plasmas

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Chinese Physics Letters 2000年第6期17卷 408-409页

作者： WU Ze-Qing zhang ben-ai QIU Yu-Bo Graduate School of China Academy of Engineering Physics P.O.Box 2101 Beijing 100088 Institute of Applied Physics and Computational Mathematics Beijing 100088

Based on the detailed configuration accounting model(DCA),a method is developed to calculate the rate of the resonant photoionization(RP)in the average atom(AA)*** this method,the RP rates are calculated for an average ion and compared with DCA *** comparison shows the reasonableness of the proposed *** RP process is included in the AA rate equations and the numerical results show that RP can cause an additional ionization up to 10%or so in some cases.

关键词： calculation. method. ionization

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输运与燃耗耦合程序MCORGS的开发

核动力工程 2010年第3期31卷 1-4页

作者：师学明张本爱中国工程物理研究院研究生部北京100088 北京应用物理与计算数学研究所计算物理国家重点实验室北京100088

开发了一套MCNP与ORIGENS耦合的接口程序MCORGS。其在绝对通量计算与截面更新的处理上都比MCCOOR程序严格,且可以处理外源问题、快中子谱问题,对复杂几何问题适应性好;整套程序(MCNP、ORIGENS、MCORGS)均用Visual FORTRAN开发,可在Windo... 详细信息

开发了一套MCNP与ORIGENS耦合的接口程序MCORGS。其在绝对通量计算与截面更新的处理上都比MCCOOR程序严格,且可以处理外源问题、快中子谱问题,对复杂几何问题适应性好;整套程序(MCNP、ORIGENS、MCORGS)均用Visual FORTRAN开发,可在WindowsXP操作系统上运行。接口程序自动化程度较高,用户输入简单。2个VVER带可燃毒物Gd的组件燃耗基准题计算结果表明,MCORGS的精度和速度都优于MCCOOR;通过计算加速器驱动的次临界系统(ADS)燃耗基准题,验证了MCORGS程序处理外源及快中子谱问题的能力。

关键词：输运燃耗计算 MCCOOR程序 MCORGS程序 MCNP程序 ORIGENS程序

Reliability ensemble averaging reduces surface wind speed projection uncertainties in the 21st century over China

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Advances in Climate Change Research 2024年第2期15卷 222-229页

作者： Zheng-Tai zhang Chang-ai XU Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric SciencesLanzhou UniversityLanzhou 730000China

Accurate prediction of future surface wind speed(SWS)changes is the basis of scientific planning for wind *** studies have projected SWS changes in the 21st century over China on the basis of the multi-model ensemble(MME)of the 6th Coupled Model Intercomparison Project(CMIP6).However,the simulation capability for SWS varies greatly in CMIP6 multi-models,so the MME results still have large *** this study,we used the reliability ensemble averaging(REA)method to assign each model different weights according to their performances in simulating historical SWS changes and project the SWS under different shared socioeconomic pathways(SSPs)in *** results indicate that REA considerably improves the SWS simulation capacity of CMIP6,eliminating the overestimation of SWS by the MME and increasing the simulation capacity of spatial *** spatial correlations with observations increased from 0.56 for the MME to 0.85 for ***,REA could eliminate the overestimation of the SWS by 33%in *** for southeastern China,the SWS generally decreases over China in the near term(2020-2049)and later term(2070-2099),particularly under high-emission *** SWS reduction projected by REA is twice as high as that by the MME in the near term,reaching-4%to-3%.REA predicts a larger area of increased SWS in the later term,which expands from southeastern China to eastern *** study helps to reduce the projected SWS uncertainties.

关键词： Surface wind speed Uncertainty Multi-model ensemble Reliability ensemble averaging CMIP6

Feasible strategy for the nitrogen fixation and humification quality improvement by spent mushroom substrate as conditioning agent

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International Journal of Agricultural and Biological Engineering 2024年第3期17卷 235-240页

作者： Shuang ai Yuanbei zhang Guoxiang Zheng College of Engineering Northeast Agricultural UniversityHarbin 150030China Key Laboratory of Swine Facilities Engineering Ministry of Agriculture and Rural AffairsHarbin 50030China Heilongjiang Key Laboratory of Technology and Equipment for the Utilization of Agricultural Renewable Resources Harbin 150030China

There is an overlooked problem which increasing microbial abundance while reducing nitrogen loss during *** study investigated the viability of spent mushroom substrate(SMS)as conditioners in the aerobic composting of kitchen waste(KW)with cattle manure(CM).The variation of temperature,pH,C/N,organic matter,cellulose,hemicelluloses,germination index(GI),and microflora structure were explored to evaluate the potential in accelerating maturity and nitrogen fixation by SMS *** results showed that the addition of SMS accelerated the heating rate,prolonged the high temperature time,and decreased organic matter,hemicellulose,and cellulose by 17.49%,23.61%,and 18.62%,*** GI reached 105.86%with SMS addition,while 74.17%was found in control treatment after *** changed the microbial community composition and increased the species ***,Clostridium XI and Azomonas were dominant bacteria,which increased the retention of nitrogen,promoted organic matter degradation and reduce compost *** study can provide a feasible strategy for nitrogen fixation in the field of organic waste recycling.

关键词： spent mushroom substrate conditioning agent nitrogen fixation humification quality aerobic composting

A model reduction approach for discrete-time linear time-variant systems with delayed inputs

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Science China(Information Sciences) 2024年第4期67卷 197-217页

作者： ai-Guo WU Guang-Ren DUAN Yu WANG Jie zhang School of Mechanical Engineering and Automation Harbin Institute of Technology(Shenzhen) HIT Wuhu Robot Technology Research Institute Center for Control Science and Technology Southern University of Science and Technology

A model reduction approach is presented for discrete-time linear time-variant input-delayed systems. According to this proposed approach, a dynamical variable is constructed by taking advantage of the current state and historical information of input. It is revealed that the behavior of this dynamical variable is governed by a discrete-time linear delay-free system. It is worth noting that the presented variable transformation does not require the system matrix to be invertible. Based on the reduced delay-free models,stabilizing control laws can be easily obtained for the original delayed system. For the case with a single input delay, the constructed variable is an exact prediction for the future state, and thus the stabilizing control law could be designed by replacing the future state with its prediction. Finally, three discrete-time periodic systems with delayed input are employed to illustrate how to utilize the presented model reduction approaches.

关键词： reduction approach predictor-based feedback time-varying systems delayed input periodic system

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Ensuring Secure Platooning of Constrained Intelligent and Connected Vehicles Against Byzantine Attacks:A Distributed MPC Framework

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Engineering 2024年第2期33卷 35-46页

作者： Henglai Wei Hui zhang Kamal ai-Haddad Yang Shi Department of Mechanical Engineering University of VictoriaVictoriaBC V8W 3P6Canada School of Transportation Science and Engineering Beihang UniversityBeijing 100191China École de Technologie Supérieure University of QuebecMontrealQC H3C 1K3Canada

This study investigates resilient platoon control for constrained intelligent and connected vehicles(ICVs)against F-local Byzantine *** introduce a resilient distributed model-predictive platooning control framework for such *** framework seamlessly integrates the predesigned optimal control with distributed model predictive control(DMPC)optimization and introduces a unique distributed attack detector to ensure the reliability of the transmitted information among ***,our strategy uses previously broadcasted information and a specialized convex set,termed the“resilience set”,to identify unreliable *** approach significantly eases graph robustness prerequisites,requiring only an(F+1)-robust graph,in contrast to the established mean sequence reduced algorithms,which require a minimum(2F+1)-robust ***,we introduce a verification algorithm to restore trust in vehicles under minor attacks,further reducing communication network *** analysis demonstrates the recursive feasibility of the DMPC ***,the proposed method achieves exceptional control performance by minimizing the discrepancies between the DMPC control inputs and predesigned platoon control inputs,while ensuring constraint compliance and *** results verify the effectiveness of our theoretical findings.

关键词： Model predictive control Resilient control Platoon control Intelligent and connected vehicle Byzantine attacks

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近临界核系统中弱源中子的涨落行为

原子能科学技术 2006年第3期40卷 316-320页

作者：刘建军张本爱北京应用物理与计算数学研究所北京100088

在近临界核系统中,弱源中子的涨落行为是一个典型的Markov分支过程。文章介绍用Markov理论与母函数方法建立相关微分方程,并导出近似解析解,着重对常数源在系统中的涨落作了数学描述,给出了数值例子。

关键词：中子增殖临界系统 Markov过程