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Optimal Policies for Quantum Markov Decision Processes

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International Journal of Automation and computing 2021年第3期18卷 410-421页

作者： ming-sheng ying Yuan Feng sheng-Gang ying Centre for Quantum Software and Information University of Technology SydneyNSW 2007Australia State Key Laboratory of Computer Science Institute of SoftwareChinese Academy of SciencesBeijing 100190China Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China

Markov decision process(MDP)offers a general framework for modelling sequential decision making where outcomes are *** particular,it serves as a mathematical framework for reinforcement *** paper introduces an extension of MDP,namely quantum MDP(q MDP),that can serve as a mathematical model of decision making about quantum *** develop dynamic programming algorithms for policy evaluation and finding optimal policies for q MDPs in the case of *** results obtained in this paper provide some useful mathematical tools for reinforcement learning techniques applied to the quantum world.

关键词： Quantum Markov decision processes quantum machine learning reinforcement learning dynamic programming decision making

Sensitivity of Interstitial combined Chemotherapy against Glioma

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医学信息（手术学分册） 2006年第4期19卷 6-8页

作者： WANG ming-sheng LIN Jian-ying ZHOU Guo-sheng ZHANG Xin-zhong The First Affiliated Hospital of Xinxiang Medical University Weihui 453100Henan P. R. China

Objective To investigate the inhibitory effects of combination chemotherapy of Carboplatin(CBP) ,Teniposide (Vm-26) ,Methasquin(MTX),and Nimodipine(NIM) on glioma,and to explore the sensitivity of glioma cells to different treatment regimens so as to provide some clues for clinical usage of interstitial combination chemotherapy. Methods MTT assay and 3H-TdR incorporation assay were performed to evaluate the inhibitory effects upon the proliferation of glioma cells,and to compare the sensitivity of glioma cells to administration of CBP,Vm-26, MTX, and NIM with that of the administration of CBP + NIM, Vm-26 + NIM, MTX + NIM, CBP + Vm-26 + MTX, or CBP + Vm-26 + MTX + NIM respectively. Results The inhibition rate of CBP + Vm-26 + MTX + NIM combination administration against glioma cells was 96.64%,which was higher than that of CBP + NIM (69.03%), Vm-26 + NIM (71.53%), MTX + NIM (52. 75% ), CBP + Vm-26 + MTX(78.59%)(P＜0.01),and the dosage of CBP,Vm-26,and MTX was declined to 1/10 ～ 1/100 that of respective use of CBP,Vm-26,and MTX. Conclusions The curative effects of combination administration of CBP,Vm-26, MTX, and NIM was much better than that of respective administration,suggesting a higher inhibition rate and a lower dosage use.

关键词： glioma combination administration interstitial chemotherapy

Oxidative stress amplifies LPS-induced neurotoxicity and nitric oxide production in microglia

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Oxidative stress amplifies LPS-induced neurotoxicity and nit...

公交车场挥发性有机物暴露水平的GC-MS测定

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： Xue-Fei WU,Yu-Mei ZHANG,sheng-ming ying,Yan-Hui FENG,Wan-Qin ZHANG,Jie ZHAO~* Dalian Medical University,Dalian,116044

＜正＞Objective Epidemic studies have shown that exposure to herbicide paraquat increases the risk of developing Parkinson’s disease（PD）.As complex I inhibitor,paraquat elicits oxidative stress and neuronal ***, which is mostly characterized by microglia activation,has been implicated in PD and other neurodegenerative diseases. Activated microglia could produce neurotoxic factors,such as nitric oxide（NO）,proinflammatory cytokines（***α）, prostaglandins and ***,uncontrolled microglia activation is a critical contributor to neurodegeneration. Indeed,paraquat-induced neuronal death is,at least in part,mediated by ***,however,does not activate microglia *** has been shown that paraquat enhances neurotoxicity induced by endotoxin LPS,which causes neurodamage by activating *** study aimed to investigate whether paraquat affects LPS-induced inflammatory response in *** Using primary microglia culture and neuron-glia culture,we have found that paraquat potentiates LPS neurotoxicity and amplifies LPS-induced nitric oxide（NO） production but not tumor necrosis factor（TNF） alpha release from *** study has shown that paraquat amplifies inducible NO synthase（iNOS） express induced by LPS though paraquat itself has no effect on iNOS protein level,which might contribute to the enhanced *** This study suggests that paraquat and other agents that can elicit oxidative stress could cause additional neurodamage by amplifying neuroinflammation that already existes（*** related neuroinflammation） besides their direct toxic effect on neurons.

关键词： microglia paraquat iNOS neuroinflammation

来源： cnki会议评论

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分析测试学报 2004年第Z1期23卷 187-188,191页

作者：何秋生王新明盛国英傅家谟中国科学院广州地球化学研究所有机地球化学国家重点实验室广东广州510640

　　空气中的挥发性有机物(volatile organic compounds, VOCs)日益受到大家的关注,这不仅因为它们具有强烈的环境效应,而且在较高浓度下可直接危害人体健康[1].研究表明机动车尾气已成为广州市区VOCs的主要来源,街区VOCs的暴露水平高... 详细信息

　　空气中的挥发性有机物(volatile organic compounds, VOCs)日益受到大家的关注,这不仅因为它们具有强烈的环境效应,而且在较高浓度下可直接危害人体健康[1].研究表明机动车尾气已成为广州市区VOCs的主要来源,街区VOCs的暴露水平高于北美和欧洲的一些国家[2,3].……

关键词： Volatile organic compounds(VOCs) Thermodesorption Monoaromatic hydrocarbons Bus park

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芳香族羟肟及其过渡金属配合物的质谱研究

化学学报 1987年第11期45卷 1085-1090页

作者：傅桂香陈耀焕周澄明吴元伟徐笑云曾明英盛怀禹中国科学院上海有机化学研究所中国科学院上海有机化学研究所上海

本文报道某些芳香族羟肟及其过渡金属铜、镍、钴和铁配合物的EI质谱,借助亚稳跃迁、高分辨质谱和稳定同位素15N、63Cu、和65Cu标记物,讨论其断裂途径,总结断裂规律.

关键词：过渡金属配合物质谱配位体金属原子粒子谱分子离子峰芳香族

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深海走航投弃式剖面仪传输信道特点的分析

海洋通报 2016年第6期35卷 708-716页

作者：郑羽方静高宇李红志宋国民尚应生王慧泉天津工业大学电子与信息工程学院天津300387 国家海洋技术中心天津300112

走航投弃式剖面仪是海洋环境数据获取的重要仪器,主要应用于海洋环境观测中海洋参数的大面积快速测量,但传输信道特点一直并不明确,对信道传输性能的提高缺乏一定的理论基础。以XCTD信道为研究对象,优化了信道的模型和传递方程,计算得... 详细信息

走航投弃式剖面仪是海洋环境数据获取的重要仪器,主要应用于海洋环境观测中海洋参数的大面积快速测量,但传输信道特点一直并不明确,对信道传输性能的提高缺乏一定的理论基础。以XCTD信道为研究对象,优化了信道的模型和传递方程,计算得到信道阻抗参数值;采用时频法研究投弃式剖面仪信道基带传输信号的时变性,分析不同频率下的信号带宽的变化特性,分析随机噪声对传输信号和误码率的影响规律,结果表明,深海走航投弃式剖面仪传输信道在不同深度和传输速率下具有的"时变/窄带/低信噪比"规律特性,该信道特点与水声信道具有更多的相似性,该结论为提高XCTD信道传输性能拓宽了研究思路,为深海投弃式观测技术发展的信道传输技术共性问题提供了理论支持。

关键词：电导率温度深度剖面仪时变信道窄带信噪比传输性能

Enhanced leaching of metals from spent lithium-ion batteries by catalytic carbothermic reduction

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Rare Metals 2023年第8期42卷 2688-2699页

作者： ying-Chao Zhang Wen-Hao Yu sheng-ming Xu Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China China National Petroleum&Chemical Planning Institute Beijing 100013China Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Tsinghua UniversityBeijing 100084China Beijing Key Lab of Fine Ceramics Tsinghua UniversityBeijing 100084China

Spent Li-ion battery(LIB)recycling has become a challenge with the rapidly developing electric vehicle(EV)*** address the problems of high cost and low recovery of Li in the recycling of spent LIBs using traditional hydrometallurgical processes,we developed an alkali metal catalytic carbothermic reduction method to recover spent LiNi_(x)Co_(y)Mn_(z)O_(2)(NCM).Using alkali metal catalysts,such as NaOH,significantly reduced the temperature required for carbothermic NCM material reduction and realized targeted control of the phase of the reduction product,where Li was first separated by prior water leaching,followed by Ni,Co,and Mn recycling by acid *** optimized carbothermic reduction conditions were a reaction time of 3 h,temperature of 550℃,NaOH dosage of 15 wt%,and graphite dosage of 15 wt%.The Li leaching efficiency reached 78.5 wt%during water *** during acid leaching,the Ni,Co and Mn leaching efficiencies were 99.8 wt%,99.7 wt%,and 99.5wt%,*** study provides strong technical support for the development of LIB industry.

关键词： Spent lithium-ion battery(LIB) Battery recycling Leaching Lithium recovery Alkali metal catalytic carbothermic reduction

The influences of perforating phase and bedding planes on the fracture deflection in laminated shale

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Petroleum Science 2024年第2期21卷 1221-1230页

作者： ming-Zhe Gu Mao sheng Xiao-ying Zhuang Xin-Yi Li Gen-sheng Li National Key Laboratory of Petroleum Resources and Engineering China University of PetroleumBeijing102249China College of Petroleum Engineering China University of PetroleumBeijing102249China College of Civil Engineering Tongji UniversityShanghai200092China

The perforating phase leads to complex and diverse hydraulic fracture propagation behaviors in laminated shale formations. In this paper, a 2D high-speed imaging scheme which can capture the interaction between perforating phase and natural shale bedding planes was proposed. The phase field method was used to simulate the same conditions as in the experiment for verification and hydraulic fracture propagation mechanism under the competition of perforating phase and bedding planes was *** results indicate that the bedding planes appear to be no influence on fracture propagation while the perforating phase is perpendicular to the bedding planes, and the fracture propagates along the perforating phase without deflection. When the perforating phase algins with the bedding planes, the fracture initiation pressure reserves the lowest value, and no deflection occurs during fracture propagation. When the perforating phase is the angle 45°, 60°and 75°of bedding planes, the bedding planes begin to play a key role on the fracture deflection. The maximum deflection degree is reached at the perforating phase of75°. Numerical simulation provides evidence that the existence of shale bedding planes is not exactly equivalent to anisotropy for fracture propagation and the difference of mechanical properties between different shale layers is the fundamental reason for fracture deflection. The findings help to understand the intrinsic characteristics of shale and provide a theoretical basis for the optimization design of field perforation parameters.

关键词： Shale Propagation Perforating Bedding Structure

Microstructure and strength features of warm and ice-rich frozen soil treated with high-performance cements

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Journal of Mountain Science 2019年第6期16卷 1470-1482页

作者： SUN Gao-chen ZHANG Jian-ming DANG ying-sheng DING Cong State Key Laboratory of Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 10049China China State Construction Engineering Corporation Aecom Consultant Co. Ltd.Lanzhou 730000China College of Water&Architectural Engineering Shihezi UniversityShihezi 832000China Shanghai Investigation Design&Research Institute Co.Ltd.Shanghai 200434China

Warm and ice-rich frozen soil(WIRFS) exhibits lower shear strength due to the weak binding forces between soil particles and ice crystals. To enhance the strength of WIRFS, frozen soil was treated separately with Portland, Phosphate, Sulphoaluminate, Portland-Phosphate and PortlandSulphoaluminate cements. After the samples were cured under -1.0°C for 7 days, the microscopic pore distribution characteristics and the macro-mechanical properties of WIRFS were investigated using mercury intrusion porosimetry(MIP), scanning electron microscopy(SEM) and unconfined compressive strength(UCS) tests. To quantitatively analyze the laws of pore-size transformation and the variation of Hausdorff volumetric fractal dimensions for pre-and post-treated WIRFS, the CURVEEXTRACT and Image-Pro Plus(IPP) image analysis system has been developed for analysing SEM images of the soil samples. Statistics of the pore-area dimension and pore-volume dimension were calculated. The results reveal that the cement-based treatment of WIRFS can improve the cementation fill of soil pores and the bond forces between soil particles. There is an evident correlation between the microstructure characteristics and the mechanical properties of the treated WIRFS. As the fractal dimensions of pore-area decrease, the unconfined compressive strength of cement-treated WIRFS increases significantly. In contrast, as the fractal dimensions of pore-volume increases, the unconfined compressive strength decreases remarkably.

关键词： Soil stabilizer Frozen soil Microstructure characteristics Macro-mechanical properties Fractal theory Scanning electron microscopy