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Numerical Investigation of Combined Production of Natural Gas Hydrate and Conventional Gas

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Fluid Dynamics & Materials Processing 2024年第3期20卷 505-523页

作者： hongzhi Xu Jian Wang Shuxia Li Fengrui Zhao Chengwen Wang Yang Guo School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China CPOE Research Institute of Engineering Technology Tianjin300451China CNPC Offshore Engineering Company Limited Beijing100028China

Natural gas hydrate(NGH)is generally produced and accumulated together with the underlying conventional ***,optimizing the production technology of these two gases should be seen as a relevant way to effectively reduce the exploitation cost of the gas *** this study,three types of models accounting for the coexistence of these gases are *** A considers the upper hydrate-bearing layer(HBL)adjacent to the lower conventional gas layer(CGL);with the Type B a permeable interlayer exists between the upper HBL and the lower CGL;with the type C there is an impermeable interlayer between the upper HBL and the lower *** production performances associated with the above three models are calculated under different conditions,including only a depressurized HBL(only HBL DP);only a depressurized CGL(only CGL DP);and both the HBL and the CGL being depressurized(HBL+CGL DP).The results show that for Type A and Type B coexistence accumulation models,when only HBL or CGL is depressurized,the gas from the other layer will flow into the production layer due to the pressure difference between the two *** the coexistence accumulation model of type C,the cumulative gas production is much lower than that of Type A and Type B,regardless of whether only HBL DP,only CGL DP,or HBL+CGL DP are *** indicates that the impermeable interlayer restricts the cross-flow of gas between HBL and *** three different coexistence accumulation models,CGL DP has the largest gas-to-water ratio.

关键词： Natural gas hydrate conventional gas coexistence accumulation depressurization combined production

Microwave-assisted fast synthesis and red-emitting properties of a borotellurate-based phosphor with excellent thermostability

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Journal of Rare Earths 2024年第6期42卷 1036-1045,I0002页

作者： Yuefei Xiang Hong Li hongzhi Zhang Lin Yang Canyuan Liao Tongsheng Yang Junpeng Li Zewen Guo Jing Zhu Key Laboratory of LCR Materials and Devices of Yunnan Province Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon TechnologiesSchool of Materials and Energy Yunnan UniversityKunming650091China

At present,with the increasing application needs of phosphor-converted white light-emitting diode(wLED),the synthetic efficiency and thermal stability of phosphor become urgent ***,this research reports a microwave-assisted fast synthesis approach to obtain a Sm^(3+)-activated borotellurate Na_(2)Y_(2)TeO_(4)(BO_(3))_(2)(NYTB)red phosphor with high crystallinity,excellent thermostability,and low chromaticity *** the NYTB-based phosphor,in contrast to the conventional solid-state synthesis,the microwave-assisted synthesis method involves lower synthesis temperature and shorter processing ***,the concentration quenching mechanism was *** w-LED device packaged with the studied phosphor exhibits a near-standard white light with proper CCT and high Ra parameters.

关键词： Borotellurate Samarium Microwave-assisted synthesis Red-emitting Thermal stability Rareearths

Low-Enthalpy and High-Entropy Polymer Electrolytes for Li-Metal Battery

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Energy & Environmental Materials 2024年第1期7卷 91-99页

作者： Haitao Zhang Yuchen Wang Junfeng Huang Wen Li Xiankan Zeng Aili Jia hongzhi Peng Xiong Zhang Weiqing Yang Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China

lonic-conductive solid-state polymer electrolytes are promising for the development of advanced lithium batteries yet a deeper understanding of their underlying ion-transfer mechanism is needed to improve *** we demonstrate the low-enthalpy and high-entropy(LEHE)electrolytes can intrinsically generate remarkably free ions and high mobility,enabling them to efficiently drive lithium-ion *** LEHE electrolytes are constructed on the basis of introducing CsPbl_(3)perovskite quantum dots(PQDs)to strengthen PEO@LiTFSI *** extremely stable cycling>1000 h at 0.3 mA cm^(-2)can be delivered by LEHE ***,the as-developed Li|LEHE|LiFePO_(4)cell retains 92.3%of the initial capacity(160.7 mAh g^(-1))after 200 *** cycling stability is ascribed to the suppressed charge concentration gradient leading to free lithium *** is realized by a dramatic increment in lithium-ion transference number(0.57 vs 0.19)and a significant decline in ion-transfer activation energy(0.14 eV vs 0.22 eV)for LEHE electrolytes comparing with PEO@LiTFSI *** CsPbl_(3)PQDs promote highly structural disorder by inhibiting crystallization and hence endow polymer electrolytes with low melting enthalpy and high structural entropy,which in turn facilitate long-term cycling stability and excellent rate-capability of lithium-metal batteries.

关键词： charge concentration gradient lithium dendrites lithium-metal battery low-enthalpy and high-entropy polymer electrolyte

Research on MPPT control of PV system based on PSO algorithm

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Research on MPPT control of PV system based on PSO algorithm

A wide load-range OTA using a digitally assisted compensating technique

2010 Chinese Control and Decision Conference

作者： Ze Cheng,Hang zhou,hongzhi Yang School of Electrical Engineering and Automation,Tianjin University,Tianjin,300072

＜正＞Partially shaded conditions are common in all kinds of PV *** mismatch phenomenon not only affects the power generated by solar system,but also leads to security ***,under partially shaded conditions, the P-V curve of PV arrays will have the characteristics of multi-summit,which makes the maximum power point tracking very difficult to *** this paper,the PSO algorithm is applied to the MPPT control algorithm in two different PV *** on establishing the multi-peak model of the PV array under partially shaded condition,the multi-peak MPPT algorithm is *** the introduction of modular structure,the distributed MPPT algorithm is *** effectiveness of the algorithm and the advantages and disadvantages of two different algorithms are examined using the *** last,the hardware circuit of the control system with man-made partially shaded condition is *** effectiveness and preciseness of the MPPT system is proved by the results of the experiments.

关键词： Maximum Power Point Tracking Particle Swarm Optimization PV System AC Module

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Science China(Information Sciences) 2024年第7期67卷 343-344页

作者： Haolin HAN Shubin LIU Yi SHEN hongzhi LIANG Yue CAO Longjie ZHONG Zhangming ZHU School of Microelectronics Xidian University

To keep pace with rapid advancements in high-quality liquid crystal displays (LCDs), there has been a growing focus on the development of low-power, high-speed output drivers in recent years. An LCD column driver typically compromises registers, data latches [1], digital-to-analog converters [2],and output buffers.

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The acute remedy of malignant central airway obstruction

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The Chinese-German Journal of Clinical Oncology 2009年第6期8卷 317-319页

作者： Kaibao Han Dong Wang Dongming Lu Xiangdong Sun hongzhi Sun Yuan zhou Gang Xu Chuansheng Zhang Department of Cardiothoracic Surgery Cancer Center of PLA Nanjing 81 Hospital Nanjing 210002 China

Objective: To explore the palliative methods to patients with central airway obstruction due to advanced malignancies. Methods: Twenty-seven patients with carcinous airway obstruction and respiratory distress were emergency remedied, including 12 cases with atelectasis and 23 with pulmonary infection. Soft cryoablated probe of CO2 and/or reticulate endobronchial stent with filmed titanium alloy were placed to the neoplasm following by bronchofibroscope. Results: Totally there were 21 patients achieved completely remission, including airway obstruction, respiratory distress and pulmonary infection remission, and 3 cases got partial remission. Meanwhile there were 3 cases died, in which one was happened during the period of endobronchial stent making, another one with heavy airway obstruction died due to asphyxia 24 h after the operation of bronchofibroscope examination, and the last one with knob invaded died because of hemoptysis and asthema secondarily 36 h after stent placed. Conclusion: The emergency remedy using soft cryoablated probe of CO2 and/or reticulate endobronchial stent with filmed titanium alloy placed to the neoplasm following by bronchofibroscope to patients with malignant central airway obstruction was a effective salvage method and could prolong patients’ lifespan for more subsequent therapeutic opportunities.

关键词： bronchus cancer cryosurgery endobronchial stent

资源拼凑、双元学习与企业创新绩效之间的关系研究

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科学学与科学技术管理 2019年第6期40卷 94-106页

作者：曹勇周蕊周红枝永田晃也武汉纺织大学管理学院日本九州大学科技创新政策研究中心湖北省企业决策支持研究中心

资源拼凑与双元学习已成为企业获取竞争优势的重要战略。基于资源基础观和组织学习视角,通过大样本问卷调查,实证研究资源拼凑对企业创新绩效的影响,并重点分析双元学习在资源拼凑与创新绩效之间的中介作用,以及IT能力对资源拼凑、双元... 详细信息

资源拼凑与双元学习已成为企业获取竞争优势的重要战略。基于资源基础观和组织学习视角,通过大样本问卷调查,实证研究资源拼凑对企业创新绩效的影响,并重点分析双元学习在资源拼凑与创新绩效之间的中介作用,以及IT能力对资源拼凑、双元学习与企业创新绩效之间关系的调节效应。结果表明:资源拼凑对企业创新绩效和双元学习均有显著正向影响;双元学习在资源拼凑与企业创新绩效之间有中介作用;IT能力正向调节资源拼凑与双元学习之间的关系,同时正向调节双元学习与企业创新绩效之间的关系。

关键词：资源拼凑双元学习创新绩效 IT能力

Artemisia argyi extract subfraction exerts an antifungal effect against dermatophytes by disrupting mitochondrial morphology and function

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Chinese Journal of Natural Medicines 2024年第1期22卷 47-61页

作者： CHEN Le ZHU Yunyun GUO Chaowei GUO Yujie ZHAO Lu MIAO Yuhuan DU hongzhi LIU Dahui College of Pharmacy Hubei University of Chinese MedicineWuhan 430065China National Resource Center for Chinese Materia Medica China Academy of Chinese Medical SciencesBeijing 100700China College of Pharmacy Nanjing University of Chinese MedicineNanjing 210023China

Artemisia argyi(***),a plant with a longstanding history as a raw material for traditional medicine and functional diets in Asia,has been used traditionally to bathe and soak feet for its disinfectant and itch-relieving *** its widespread use,scientific evidence validating the antifungal efficacy of *** water extract(AAWE)against dermatophytes,particularly Trichophyton rubrum,Trichophyton mentagrophytes,and Microsporum gypseum,remains *** study aimed to substantiate the scientific basis of the folkloric use of *** by evaluating the antifungal effects and the underlying molecular mechanisms of its active subfraction against *** results indicated that AAWE exhibited excellent antifungal effects against the three aforementioned dermatophyte *** subfraction AAWE6,isolated using D101 macroporous resin,emerged as the most potent *** minimum inhibitory concentrations(MICs)of AAWE6 against ***,***,and *** were 312.5,312.5,and 625μg·mL−1,*** electron microscopy(TEM)results and assays of enzymes linked to cell wall integrity and cell membrane function indicated that AAWE6 could penetrate the external protective barrier of ***,creating breaches(“small holes”),and disrupt the internal mitochondrial structure(“granary”).Furthermore,transcriptome data,quantitative real-time PCR(RT-qPCR),and biochemical assays corroborated the severe disruption of mitochondrial function,evidenced by inhibited tricarboxylic acid(TCA)cycle and energy ***,chemical characterization and molecular docking analyses identified flavonoids,primarily eupatilin(131.16±4.52 mg·g^(−1))and jaceosidin(4.17±0.18 mg·g^(−1)),as the active components of *** conclusion,the subfraction AAWE6 from *** exerts antifungal effects against dermatophytes by disrupting mitochondrial morphology and *** research validates the traditional use of *** and provides scient

关键词： Artemisia argyi Dermatophyte Antifungal activity Mitochondrial structure Mitochondrial function Transcriptome analysis

基于快速成型技术的电火花加工用石墨电极研磨技术

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西安交通大学学报 2000年第11期34卷 61-64页

作者：唐一平周宏志王平卢秉恒西安交通大学西安710049

介绍了一种制造电火花加工用石墨电极的新工艺 .这种技术采用高频微振动原理 ,直接用快速成型制成的母型翻制成形研具 ,然后利用这种研具 ,在没有任何刀具或夹具的情况下 ,加工出形状复杂的石墨电极 .目前 ,已采用一种自行开发的价格低... 详细信息

介绍了一种制造电火花加工用石墨电极的新工艺 .这种技术采用高频微振动原理 ,直接用快速成型制成的母型翻制成形研具 ,然后利用这种研具 ,在没有任何刀具或夹具的情况下 ,加工出形状复杂的石墨电极 .目前 ,已采用一种自行开发的价格低廉、性能可靠的树脂水泥材料浇铸成了研具 ,并用它制成了石墨电极。

关键词：石墨电极电火花加工快速成型研磨