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A THEORETIC METHOD TO PREDICT POLYMER SOLUBILITY PARAMETERS

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Chinese Journal of Polymer Science 2007年第2期25卷 203-206页

作者： Qing ji Bao-fu qiao De-lu Zhao State Key Laboratoryof Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

A partition function and a complete thermodynamic description for pure polymer fluids have been investigated based on a self-avoid-walk lattice model. Caused by the introduction of Gibbs distribution into the Flory-Huggins theory, the partition function and the thermodynamic description depicted their dependence on temperature well. In the present study, we applied the theory to calculate polymer solubility parameters. The polymer solubility parameters predicted by our theory are well consistent with the experiment values.

关键词： Polymer Solubility parameters Gibbs distribution.

Preventive Control for Power System Transient Security Based on XGBoost and DCOPF with Consideration of Model Interpretability

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CSEE Journal of Power and Energy Systems 2021年第2期7卷 279-294页

作者： Songtao Zhang Dongxia Zhang ji qiao Xinying Wang Zhijian Zhang China Electric Power Research Institute Beijing 100192China State Grid Beijing Electric Power Dispatching and Control Center Beijing 100031China

This paper proposes a new approach for online power system transient security assessment(TSA)and preventive control based on XGBoost and DC optimal power flow(DCOPF).The novelty of this proposal is that it applies the XGBoost and data selection method based on the 1-norm distance in local feature importance evaluation which can provide a certain model *** method of SMOTE+ENN is adopted for data *** contingency-oriented XGBoost model is trained with databases generated by time domain simulations to represent the transient security constraint in the DCOPF model,which has a relatively fast speed of *** transient security constrained generation rescheduling is implemented with the differential evolution algorithm,which is utilized to optimize the rescheduled generation in the preventive *** and effectiveness of the proposed approach are demonstrated on an IEEE 39-bus test system and a 500-bus operational model for South Carolina,USA.

关键词： DC optimal power flow(DCOPF) model interpretability preventive control transient security assessment(TSA) XGBoost

Chemisorption-Induced Resonance Frequency Shift of a Microcantilever

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Chinese Physics Letters 2012年第5期29卷 193-196页

作者： ZHANG ji-qiao FENG Xi-qiao HUANG Gan-Yun YU Shou-Wen Faculty of Civil and Transportation Engineering Guangdong University of TechnologyGuangzhou 510006 AML Department of Engineering MechanicsTsinghua UniversityBeijing 100084 Department of Mechanics School of Mechanical EngineeringTianjin UniversityTianjin 300072

The autonomy and property of atoms/molecules adsorbed on the surface of a microcantilever can be probed by measuring its resonance frequency shift due to *** resonance frequency change of a cantilever induced by chemisorption is theoretically studied. Oxygen chemisorbed on the Si(100) surface is taken as a representative *** demonstrate that the resonant response of the cantilever is mainly determined by the chemisorption-induced bending stiffness variation,which depends on the bond configurations formed by the adsorbed atoms and substrate *** study is helpful for optimal design of microcantilever-based sensors for various applications.

关键词： cantilever adsorbed sorption

Effects of Destruxin A on Hemocytes Morphology of Bombyx mori

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Journal of Integrative Agriculture 2013年第6期12卷 1042-1048页

作者： FAN ji-qiao CHEN Xiu-run HU Qiong-bo College of Resources and Environment South China Agricultural University

Destruxin A （DA）, a kind of cyclo-hexadepsipeptide isolated from entomopathogenic fungus, Metarhizium anisopliae, is an inhibitor of insect＇s immunity. But its mechanism has not been clarified yet. In this study, the effects of DA on morphologic changes of in vivo and in vitro hemocytes of silkworm, Bombyx mori, were investigated by means of inverted phase contrast microscopy （IPCM）, fluorescence microscopy （FCM） and environmental scanning electron microscopy （ESEM）. The results indicated that DA was cytotoxic to granulohemocytes （GR） and plasmatocytes （PL）. The LC 50 values of DA against in vitro GR and PL of silkworm were 68.77 and 84.11 μg mL-1, respectively. However, the hemocytes in vivo were more susceptible to DA, although at the extremely low dose of 10 μL of 12.5 μg mL-1 for each insect （i.e., 0.036 μg g-1 body weight, or approximately 0.25 μg mL-1 hemolymph）, DA could induce obviously morphologic alterations of hemocytes in vivo. The results imply that there might be some factors in silkworm＇s hemolymph, which influence the interaction of DA and hemocytes.

关键词： destruxin toxicity hemocytes silkworm

Insight on Viscoelasticiy of Ti16.7Zr16.7Hf16.7Cu16.7Ni16.7Be16.7 High Entropy Bulk Metallic Glass

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Journal of Iron and Steel Research International 2016年第1期23卷 19-23页

作者： ji-chao qiao Jean-marc PELLETIER Ning LI Yao YAO School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi'an 710072ShaanxiChina Universite de Lyon MATEISUMR CNRS5510Bat.B.PascalINSA-LyonF-69621 Villeurbanne cedexFrance Department of Materials Science and Engineering State Key Laboratory for Materials Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan 430074HuheiChina

High entropy bulk metallic glasses show promising mechanical and physical *** mechanical properties of Ti_（16.7）Zr_（16.7）Hf_（16.7）Cu_（16.7）Ni_（16.7）Be_（16.7）high entropy bulk metallic glass were investigated by mechanical spectroscopy（or called dynamic mechanical analysis）.The main（α）relaxation was observed in the framework of the loss modulus G″,which is related to the dynamic glass transition behaviour for the glassy *** physical model point of view,dynamic mechanical properties of the Ti_（16.7）Zr_（16.7）Hf_（16.7）Cu_（16.7）Ni_（16.7）Be_（16.7）high entropy bulk metallic glass show good agreement compared with the quasi-point defects theory.

关键词： high entropy bulk metallic glass viscoelasticity mechanical spectroscopy quasi-point defect theory

Resources allocation in an Intserv/Diffserv integrated EPON system

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The Journal of China Universities of Posts and Telecommunications 2009年第3期16卷 108-113,121页

作者： LIU Qiong LI Hui ji Yue-feng qiao Yao-jun Key Laboratory of Optical Communications and Lightwave Technologies Beijing University of Posts and Telecommunications Beijing 100876 China

As one of the most promising next-generation access network （EPON） should pay more attention to its quality of service （QoS）, techniques, the user-oriented Ethernet passive optical network However, now the EPON adopts mostly differentiated services model （Diffserv） that only provides quality control on traffic aggregation, whereas, the quality of user session cannot be guaranteed when the network is overloaded with substantial connections. This article proposes to apply integrated services model （Intserv） in Diffserv-based EPON, which uses per-flow processing to guarantee QoS. In the simulation, a framework of combined Diffserv and Intserv model is employed in an EPON system, with a dynamic bandwidth allocation algorithm that adapts to it. The simulation results demonstrate that the EPON system with the combined models can provide more flexible, various control for user-oriented service quality.

关键词： QoS Intserv Diffserv resource reservation

Liver transplantation benefits selected patients with hilar cholangiocarcinoma and colorectal liver metastases

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Hepatobiliary & Pancreatic Diseases International 2018年第5期17卷 385-386页

作者： ji-qiao Zhu Qiang He Xian-Liang Li Department of Hepatobiliary and Pancreatic Surgery Beijing Chaoyang Hospital Capital Medical University

Hilarcholangiocarcinoma(HCCA)isanaggressivemalignancy with a dismal prognosis. The 5-year survival rate has been reported to range from 39%to 50%if an R0 resection is obtained [1]. Approximately 25%patients with early stage HCCA of all cases can be treated with radical surgical resection [2], while most patients do not have a chance to receive a surgical procedure due to the advanced stage at the time of diagnosis. The poor prognosis is gen-

关键词： Liver transplantation benefits selected patients with hilar cholangiocarcinoma and colorectal liver metastases

Slowβrelaxation in La-based metallic glasses based on mechanical spectroscopy measurements

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Journal of Iron and Steel Research International 2017年第4期24卷 397-401页

作者： ji-chao qiao Jean-marc Pelletier Ning Li Daniel Crespo Yao Yao School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi'an 710072ShaanxiChina Universite de Lyon MATEISUMR-CNRS5510Bat.B.PascalINSA LyonF-69621 Villeurbanne cedexFrance Department of Materials Science and Engineering State Key Laboratory for Materials Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan 430074HubeiChina Departament de Fisica EETACUniversitat Politecnica de CatalunyaCastelldfels 08860BarcelonaSpain

Dynamic mechanical relaxations of La-based metallic glasses were investigated by mechanical *** the framework of the mixing enthalpy of constituent atoms,it was found thatβrelaxation was less evident by the addition of Cu to replace Ni in the LaCuNiAl glassy *** introducing Cu into the LaNiAl metallic glass,the mixing enthalpy was less negative,which led to weakerβrelaxation of the metallic ***αrelaxation of the La-based metallic glasses could be described by a Kohlrausch-Williams-Watts（KWW）function with a Kohlrausch exponentβKWW around *** should be noted that physical aging above the glass transition temperature Tginduced a decrease ofβrelaxation intensity in the La-based metallic glass.

关键词： Metallic glass Mechanical relaxation βrelaxation Mixing enthalpy

Collective Entity Alignment for Knowledge Fusion of Power Grid Dispatching Knowledge Graphs

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IEEE/CAA Journal of Automatica Sinica 2022年第11期9卷 1990-2004页

作者： Linyao Yang Chen Lv Xiao Wang ji qiao Weiping Ding Jun Zhang Fei-Yue Wang the State Key Laboratory for Management and Control of Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190 the School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China the China Electric Power Research Institute Beijing 100192China IEEE the Qingdao Academy of Intelligent Industries Qingdao 256200China the School of Information Science and Technology Nantong UniversityNantong 226019China the School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China

Knowledge graphs(KGs)have been widely accepted as powerful tools for modeling the complex relationships between concepts and developing knowledge-based *** recent years,researchers in the field of power systems have explored KGs to develop intelligent dispatching systems for increasingly large power *** multiple power grid dispatching knowledge graphs(PDKGs)constructed by different agencies,the knowledge fusion of different PDKGs is useful for providing more accurate decision *** achieve this,entity alignment that aims at connecting different KGs by identifying equivalent entities is a critical *** entity alignment methods cannot integrate useful structural,attribute,and relational information while calculating entities’similarities and are prone to making many-to-one alignments,thus can hardly achieve the best *** address these issues,this paper proposes a collective entity alignment model that integrates three kinds of available information and makes collective counterpart *** model proposes a novel knowledge graph attention network(KGAT)to learn the embeddings of entities and relations explicitly and calculates entities’similarities by adaptively incorporating the structural,attribute,and relational ***,we formulate the counterpart assignment task as an integer programming(IP)problem to obtain one-to-one *** not only conduct experiments on a pair of PDKGs but also evaluate o ur model on three commonly used cross-lingual *** comparisons indicate that our model outperforms other methods and provides an effective tool for the knowledge fusion of PDKGs.

关键词： Entity alignment integer programming(IP) knowledge fusion knowledge graph embedding power dispatch