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Geological characterization and exploration potential of shale gas in the Carboniferous Jiusi Formation,northern Guizhou and yunnan provinces,SW China

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Energy Geoscience 2023年第3期4卷 169-181页

作者： Weiming feng Rong Li zhan Zhao Qian yu Wei Liu Junfeng Cao Chengdu Center China Geological SurveyChengdu610081China Key Laboratory for Sedimentary Basins with Oil and Gas Resources Ministry of Land and ResourcesChengduSichuan610081China

Dark mudstones and shales of the Carboniferous Jiusi Formation are widely developed in northern Guizhou and yunnan provinces, SW China. However, the distribution, reservoir characterization, and exploration potential of organic-rich shales in this area are yet to be quantified, thus limiting the prospect of shale gas in this area. This study investigates the basic geological conditions of Jiusi shale gas, using core data, well-logs, and some other test data, obtaining the following results. The organic-rich shales are mainly composed of deltaic-to-shallow-shelf deposits, with thickness ranging from 0 to 450 m, and above 350 m around the subsidence center. The organic matter is mainly type Ⅱ kerogen with TOC content of mostly 1%–2%, indicating a moderate maturity. The argillaceous shale reservoirs are indicative of strong heterogeneity, high clay minerals content, low porosity, low permeability, high specific surface area, and relatively developed secondary porosity. The gas-log anomaly intervals obtained from the survey wells have a cumulative thickness that is apparently greater than 200 m, and a few shale intervals showing high desorbed and adsorbed gas contents. Due to complex structures in the study area, conditions responsible for shale gas occurrence and trapping are generally moderate. However, areas having wide and gentle folds with moderate depth of burial reveals relatively favorable conditions of hydrocarbon traps. In contrast with typical marine-continental transitional shales, the Jiusi shale have better geological conditions for shale gas preservation. The analysis of the geological framework and hydrocarbon potential of Carboniferous Jiusi Formation provide more insight for the exploration of Carboniferous shale gas in southern China.

关键词： Marine-continental tansitional fades 0rganic-nich shale Shale gas Exploration potential Carboniferous Northem border area between Guizhou and yunnan China

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Pricing the spare bandwidth: towards maximizing data center's profit

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Science China(Information Sciences) 2016年第10期59卷 50-59页

作者： Yong zhan Du XU Hongfang yu School of Communication & Information Engineering University of Electronic Science and Technology of China

To provide tenants with predictable network performance, tenants are allowed to purchase specified amount of data center network(DCN) resources(e.g., bandwidth). Then, data center will reserve the purchased resources for the corresponding tenants. Meanwhile, some DCNs are work conserving, which means that the spare bandwidth will be fairly shared by all active tenants. Even though the amount of the spare bandwidth is stochastic and uncertain, DCN providers are not likely to give away it for free. Thus, data center with work conserving may impose extra payment on tenants for using the spare bandwidth. In this paper, we propose a suitable tariff to charge for the usages of DCN resources, which includes a bill for the usage of the spare bandwidth. Through theoretical analysis and simulation, we demonstrate that our tariff can incentivize tenants to adjust their purchases of bandwidths, which can lead to the improvement of data center's profit by 27.4%without impairing the social welfare.

关键词： spare bandwidth data center network(DCN) bandwidth reservation work conserving pricing/tariff

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Hydrothermal Synthesis and Crystal Structure of Inorganic-organic Hybrid Compound [H_3NC_2H_4NH_2]VOPO_4

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Chemical Research in Chinese Universities 2001年第3期17卷 249-252页

作者： zhanG Dong SHI zhan feng Shou-hua National Key Laboratory of Inorganic Synthesis&Preparative Chemistry Department of ChemistryJilin UniversityChangchun 130023P.R.China

An inorganic-organic hybrid compound, [H_3NC_2H_4NH_2]VOPO_4 was synthesized by means of the hydrothermal method. It was crystallized in a monoclinic system, a space group P2_1/c, with the crystal cell parameters: a=0.92285(11) nm, b=0.72994(9) nm, c=0.98495(11) nm, β=101.280(3)°, V=0.65067(13) nm^3, M_r=223.02 g/mol, D_c=2.277 g/cm^3, Z=4, R=0.0315, ωR=0.0865, GOF=1.085. The VO_5N octahedra chains are corner-linked by PO_4 tetrahedra; the VO_5N octahedra are all trans-linked with V—O bonds being alternately short and long. The monoprotonated ethylenediamine was intercalated between the layers with one end coordinating to V and the other end as an H-bond donor interacting with a terminal O atom of PO_4 from a neighboring sheet. The elementary analysis, infrared spectrum characters and thermal stability were also given.

关键词： Inorganic-organic hybrid material Hydrothermal synthesis Vanadium phosphate Crystal structure

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Realization of high performance for PM6:Y6 based organic photovoltaic cells

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Journal of Energy Chemistry 2021年第10期30卷 29-46,I0002页

作者： Runnan yu Guangzheng Wu zhan’ao Tan Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China

With advances in material science and a more in-depth understanding of device engineering,the power conversion efficiency(PCE)of solution-processed organic photovoltaic(OPV)cells have significantly boosted in the past few *** 2019,a high PCE of 15.7%was achieved in the OPV cells adopting a wide bandgap polymer PM6 and a new emerging non-fullerene acceptor *** outstanding performance has attracted lots of research attention,driving considerable efforts to improve or take advantage of the high-performance PM6:Y6-based *** this review,we first concentrate on the structural characteristics of PM6 and Y6 with the focus on understanding why their combination for OPV application can obtain such high *** also update the recent progress in highly efficient PM6:Y6-based OPV cells via various optimizing *** we summarize the other applications of the PM6:Y6-based system in semi-transparent,flexible or lay e-by-layer *** prospects for future OPV studies will be suggested in the end.

关键词： Organic solar cells Morphology controlling Device engineering PM6 Y6

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Robustness of two-qubit and three-qubit states in correlated quantum channels

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Chinese Physics B 2022年第7期31卷 112-118页

作者： zhan-yun Wang feng-Lin Wu Zhen-yu Peng Si-yuan Liu School of Electronic Engineering Xi’an University of Posts and TelecommunicationsXi’an 710121China Institute of Modern Physics Northwest UniversityXi’an 710127China Shaanxi Key Laboratory for Theoretical Physics Frontiers Xi’an 710127China School of Physics Northwest UniversityXi’an 710127China

We investigate how the correlated actions of quantum channels affect the robustness of entangled *** consider the Bell-like state and random two-qubit pure states in the correlated depolarizing,bit flip,bit-phase flip,and phase flip *** is found that the robustness of two-qubit pure states can be noticeably enhanced due to the correlations between consecutive actions of these noisy channels,and the Bell-like state is always the most robust *** also consider the robustness of three-qubit pure states in correlated noisy *** the correlated bit flip and phase flip channels,the result shows that although the most robust and most fragile states are locally unitary equivalent,they exhibit different robustness in different correlated channels,and the effect of channel correlations on them is also significantly ***,for the correlated depolarizing and bit-phase flip channels,the robustness of two special three-qubit pure states is exactly the ***,compared with the random three-qubit pure states,they are neither the most robust states nor the most fragile states.

关键词： correlated quantum channel entanglement concurrence negativity

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Morphology and Magnetic Properties of Electrodeposited Iron and Nickel Based Alloy Foils

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Journal of Iron and Steel Research International 2004年第6期11卷 45-51页

作者： GUO zhan-cheng LIU Mei-feng SUN Chun-wen LIU yu-xing LU Wei-chang Institute of Process Engineering CAS

An alternative to conventional process for the preparation of soft magnetic metal foils of Fe,Fe-Ni,Fe-Co and Fe-Ni-Co by electroforming was *** microstructure and magnetic properties were *** results showed that the crystal size of the iron-based alloy foil is less than 10μm,while that of nickel-based alloy foil is about 2μ***,the electroformed Fe-Ni foil has better magnetic properties than the conventional milled permalloy 1J79 foil.

关键词： electroforming Fe-Ni alloy foil magnetic property microstructure

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General Model of Temperature-dependent Modulus and Yield Strength of Thermoplastic Polymers

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Chinese Journal of Polymer Science 2020年第4期38卷 382-393,I0007页

作者： Ping-yuan Huang zhan-Sheng Guo Jie-Min feng Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering ScienceShanghai UniversityShanghai200072China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai 200072China

A general model was developed to predict the temperature-dependent modulus and yield strength of different thermoplastic *** model,which depends on only two parameters with clear and specific physical meanings,can describe the temperaturedependent modulus and yield strength of thermoplastic polymers over the full glass transition *** temperature-dependent modulus and yield strength of three thermoplastic polymers were measured by uniaxial tension tests over a temperature range of 243-383 *** predictions showed excellent agreement with the experimental *** analysis of model input parameters showed negligible effect on the present general *** universality of the present general model was further validated,showing excellent agreement with published experimental data on other thermoplastic polymers and their composites.

关键词： Thermoplastics Modulus Yield strength Modeling Glass transition

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Chiral Imidazoline Ligands and Their Applications in Metal-Catalyzed Asymmetric Synthesis

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Chinese Journal of Chemistry 2021年第2期39卷 488-514页

作者： Jiajing Li Bing yu zhan Lu Department of Chemistry Zhejiang UniversityHangzhouZhejiang310058 China College of Chemistry Zhengzhou UniversityZhengzhouHenan450001 China

As a structural analog of oxazoline,imidazoline(4,5-dihydroimidazole)has received much attention in the rational design of chiral *** additional N-substituent provides broader space for fine-tuning of electronic and steric effects,and it offers a good handle for immobilizing onto solid *** the past decades,imidazoline ring has emerged as a powerful candidate for the design of chiral nitrogen-containing ligands,as well as a significant alternative for oxazoline *** chiral imidazoline ligands have been designed and utilized in asymmetric organic *** new catalysts can not only be applied in classical reactions,but also be employed to develop new organic reactions with high *** review provides an overview of chiral imidazoline *** applications in asymmetric synthesis are also summarized.

关键词： N ligands Asymmetric catalysis Chiral imidazoline Enantioselectivity Metal catalysis

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Selective Atom-Cavity Interaction Scheme for Quantum Controlled-NOT Gate Using Four-Level Atoms in Cavity QED System

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Communications in Theoretical Physics 2009年第2期51卷 247-251页

作者： TANG Shi-Qing zhanG Deng-yu XIE Li-Jun zhan Xiao-Gui GAO feng Faculty of Material and Photoelectronic Physics Xiangtan University Xiangtan 411005 China Department of Physics and Electronic Information Science Hengyang Normal University Hengyang 421008 China

We propose a scheme for realization a quantum Controlled-NOT gate operation using two four-level atoms through a selective atom cavity interaction in cavity quantum electrodynamics system. In our protocol, the quantum information is encoded on the stable ground states of the two atoms. During the interaction between atoms and single-mode vacuum cavity-field, the atomic spontaneous emission is negligible as the large atom-cavity detuning effectively suppresses the spontaneous decay of the atoms. The influences of the dissipation and the deviation of interaction time on fidelity and corresponding success probability of the quantum Controlled-NOT gate and the experimental feasibility of our proposal are also discussed.

关键词： controlled-NOT gate four-level atom cavity QED fidelity

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Controlled Telecloning and Teleflipping for One-Qubit Pure States

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Communications in Theoretical Physics 2009年第6期51卷 1023-1026页

作者： zhan Xiao-Gui zhanG Deng-yu GAO feng LI Yan-Ling ZENG Hao-Sheng Department of Physics Hengyang Normal University Hengyang 421008 China Department of Physics Hunan Normal University Changsha 410081 China

We propose a scheme for realizing controlled 1→2 telecloning and 1 →1 teleflipping for one-qubit pure states via a quantum network including N agents. The quantum operations used in the information-transmission process are just only one Bell-state measurement, and a series of single-qubit operation. It is shown that the fidelities of the controlled telecloning and teleflipping are independent of the initial states and reach their optimal values of 5/6 and 2/3 respectively on the condition that all the agents collaborate. If any one agent does not cooperate, the fidelities become state-dependent and are always smaller than the corresponding optimal values. The average fidelities are equal to the balanced value 1/2, which implies that on average the state ineepted by any one of the receivers is a fuUy mixed state. Thus no information leaks out to any dishonest receivers. The security of telecloning and teleflipping have been increased greatly.

关键词： controlled telecloning controlled teleflipping agent

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