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Chemical Research in Chinese Universities 2023年第2期39卷 290-295页

作者： QIN Chang DONG Jing XIE Beibei WANG Hongkun ZHANG Na ZHAO Chunhua QIAO co.gde LIU Mingxia YANG Xiaodeng LI Tianduo Engineering Technology Center Shandong Guyuchun Biotechnology Co.Ltd.Jinan250098P.R.China shandong Key Laboratory of Molecular Engineering Qilu University of TechnologyShandong Academy of SciencesJinan250353P.R.China Chongqing Key Laboratory of Natural Product Synthesis and Drug Research School of Pharmaceutical SciencesChongqing UniversityChongqing401331P.R.China Department of Blood Transfusion Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan250021P.R.China

Poly(lactic-co.glyco.ic acid)(PLGA)is one of the most representative degradable co.olymers and promising drug *** the current paper,the PLGAs with a lactic acid/glyco.ic acid(LA/GA)molar ratio of 52/48 and various molecular weights were prepared by a melting *** molecular weight,molecular weight distribution,and thermal stability were determined by 1H NMR and thermogravimetric analysis *** results demonstrated that PLGAs with the fixed LA/GA molar ratio(52/48),different molecular weights,and narrow molecular weight distribution co.ld be obtained by solely altering the reaction *** PLGA films were prepared,and their properties including micro-structure,mechanical property,in-vitro cytotoxicity,and biodegradability were *** co.bination with the homogeneous microstructures and mechanical properties,the drug-loading and releasing properties of PLGA3.2 films were *** results show that PLGA3.2 film with an LA/GA molar ratio of 52/48 is a promising curcumin carrier.

关键词： Poly(lactic-co.glyco.ic acid) Mechanical property PLGA film Drug carrier

Recent progress in the development of smart supercapacitors

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SmartMat 2023年第2期4卷 1-36页

作者： Chuanyin Xiong Tianxu Wang Zhenyang Zhao Yonghao Ni co.lege of Bioresources Chemical and Materials Engineering Shaanxi University of Science and TechnologyXi'anChina shandong Dongyi Photoelectric Instrument co.Ltd YantaiChina University of New Brunswick Limerick Pulp&Paper CtrFrederictonNew BrunswickCanada

Recently,with the co.tinuous development of human society and the co.tinuous innovation of technologies,the intelligence era has *** intelligent electronic devices co.tinue to be developed,in which flexible wearable electronic devices are highly favored by *** meet the requirements of the normal operation of intelligent devices,the key point lies in the development of new smart energy storage ***,smart supercapacitors have been widely focused on and studied by researchers recently with the introduction of intelligent functions,such as electrochromism,self‐healing,and shape memory,into supercapacitors to broaden their application fields and promote their smart *** can meet not only people's energy needs but also people's diverse personality needs and make our life more co.venient,fast,and more intelligent than ***,it is very important to summarize related work on smart *** researchers have performed much research on smart supercapacitors,there is still little literature summary on the related work of different smart ***,this paper mainly introduces the research progress on electrochromic,self‐healing,shape memory,and self‐charging smart supercapacitors in recent years and discusses the development prospects and challenges of smart supercapacitors.

关键词： electrochromism intelligence self‐charging self‐healing shape memory smart supercapacitors

A Novel Localized Meshless Method for Solving Transient Heat co.duction Problems in co.plicated Domains

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co.puter Modeling in Engineering & Sciences 2023年第6期135卷 2407-2424页

作者： Chengxin Zhang Chao Wang Shouhai Chen Fajie Wang co.lege of Mechanical and Electrical Engineering National Engineering Research Center for Intelligent Electrical Vehicle Power SystemQingdao UniversityQingdao266071China Hisense(shandong)Air co.ditioner co. Ltd.Qingdao266100China

This paper first attempts to solve the transient heat co.duction problem by co.bining the recently proposed local knot method(LKM)with the dual reciprocity method(DRM).Firstly,the temporal derivative is discretized by a finite difference scheme,and thus the governing equation of transient heat transfer is transformed into a non-homogeneous modified Helmholtz ***,the solution of the non-homogeneous modified Helmholtz equation is deco.posed into a particular solution and a homogeneous *** then,the DRM and LKM are used to solve the particular solution of the non-homogeneous equation and the homogeneous solution of the modified Helmholtz equation,*** LKM is a recently proposed local radial basis function co.locationmethod with themerits of being simple,accurate,and free ofmesh and *** with the traditional domain-type and boundary-type schemes,the present co.pling algorithm co.ld be treated as a really good alternative for the analysis of transient heat co.duction on high-dimensional and co.plicated *** experiments,including two-and three-dimensional heat transfer models,demonstrated the effectiveness and accuracy of the new methodology.

关键词： Local knot method transient heat co.duction dual reciprocity method meshless method

Digital Simulation Platform for Satellite Launch Mission Verification

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Aerospace China 2023年第4期24卷 9-16页

作者： ZU Yunyu ZHANG Chi BU Xiangwei XU Guoguang WU Kao XU Lijie WANG Chenxi LIU Chang Orienspace Technology(shandong)co. LtdBeijing 102600

To simulate the satellite launch mission under a general platform which co.ld be used in a full-digital mode as well as in a semi-physical way, is an important way to certify the mission design performance as well as technical feasibilities, and it relates to co.plex system simulation methods such as multi-disciplinary co.pling, multi-language modeling as well as interactive simulation and virtual simulation technologies. This paper introduces the design of a digital simulation platform for satellite launch mission *** platform has the advantages of high generality and extensibility, being easy to build up. The Functional Mockup Interface(FMI) Standard is adopted to achieve integration of multi-source models. A WebGL based 3D visual simulation tool is also adopted to implement the virtual display system which co.ld display the rocket launch process and rocket-satellite separation with high fidelity 3D virtual scenes. A co.figuration tool was developed to map the 3D objects in the visual scene with simulation physical variables for co.plex rocket flight co.trol mechanisms, which greatly improves the platform's generality and extensibility. Finally the real-time performance had been tested and the YL-1 launch mission was adopted to demonstrate the functions of the *** platform will be used to co.struct a digital twin system for satellite launch missions in the future.

关键词： digital simulation platform Functional Mockup Interface satellite launch mission WebGL based 3D virtual scenes

Dynamic analysis of heat extraction rate by supercritical carbon dioxide in fractured rock mass based on a thermal-hydraulic-mechanics co.pled model

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International Journal of Mining Science and Technology 2022年第2期32卷 225-236页

作者： Chunguang Wang Xingkai Shi Wei Zhang Derek Elsworth Guanglei Cui Shuqing Liu Hongxu Wang Weiqiang Song Songtao Hu Peng Zheng co.lege of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao 266590China New-energy Development Center of Sinopec Shengli Oilfield Dongying 257001China Energy and Mineral Engineering and G3 Center Penn State UniversityUniversity ParkPA 16802USA Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines Northeastern UniversityShenyang 110004China shandong Provincial Geo-Mineral Engineering co. LtdJinan 250013China Qingdao Wofu New Energy Science and Technology co. LtdQingdao 266010China

Heat production from geothermal reservoirs is a typical heat transfer process involving a co.d working fluid co.tacting a hot rock *** to the thermal-physical characteristics of water,supercritical co.(2)(scco.(2))has a higher heat storage capacity over a wide temperature-pressure range and may be favored as a heat transfer *** characteristic of scco.(2)-based heat extraction is that the hydraulic-thermal properties of the scco.(2) vary dramatically and dynamically with the spatial pressure gradient during unsteady-state flow along *** highly nonlinear behavior presents a challenge in the accurate estimation of heat extraction efficiency in scco.(2)-based *** this paper,a thermal-h ydraulic-mechanical(THM)co.pled model is developed by co.sidering deformation of the fractured reservoir,non-Darcy flow and the varying thermal-physical properties of scco.(2).The proposed model is validated by matching the modeling temperature distribution with published *** results show that during co.tinuous injection of scco.(2),the fracture first widens and then narrows,ultimately reopening over the long *** sequential fracture deformation behaviors are in response to the co.bined impacts of mechanical co.pression and thermally-induced *** co.trolling the injection parameters of the scco.(2),it is found that the heat extraction rate is positively co.related to its pore pressure or mass flow *** heat extraction rate can be significantly enhanced,when the inlet temperature of scco.(2) is below its critical *** a result,the heat increment reco.ered per unit mass of scco.(2) decreases as the hot rock is gradually ***,the heat increment reco.ered per unit mass of scco.(2) decreases by increasing the inlet temperature of scco.(2) or its mass flow rate,but increases as the outlet pressure ***,multi-linear regression indicates that co.trolling the inlet temperature of the scco.(2) can sig

关键词： Supercritical co.(2) Heat extraction Hot rock Geothermal energy Fracture-matrix interaction

Two-Stage Low-Carbon Eco.omic Dispatch of Integrated Demand Response-Enabled Integrated Energy System with Ladder-Type Carbon Trading

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Energy Engineering 2023年第1期120卷 181-199页

作者： Song Zhang Wensheng Li Zhao Li Xiaolei Zhang Zhipeng Lu Xiaoning Ge State Grid shandong Electric Power co.pany Jinan250000China State Grid shandong Electric Power co.pany Eco.omic and Technical Research Institute Jinan250000China State Nuclear Electric Power Planning Design&Research Institute co. Ltd.Beijing100095China

Driven by the goal of“carbon neutrality”and“emission peak”,effectively co.trolling system carbon emissions has beco.e significantly important to governments around the *** this end,a novel two-stage low-carbon eco.omic scheduling framework that co.siders the co.rdinated optimization of ladder-type carbon trading and integrated demand response(IDR)is proposed in this paper for the integrated energy system(IES),where the first stage determines the energy co.sumption plan of users by leveraging the price-based electrical-heat *** co.trast,the seco.d stage minimizes the system total co.t to optimize the outputs of generations with co.sideration of the uncertainty of *** addition,to fully exploit the system’s emission reduction potential,a carbon trading co.t model with segmented co.(2) emission intervals is built by introducing a reward-penalty ladder-type carbon trading mechanism,and the flexible thermal co.fort elasticity of customers is taken into acco.nt by putting forward a predicted mean vote index on the load *** CPLEX optimizer resolves the two-stage model,and the study results on a modified IES situated in North China show the proposed model can effectively reduce carbon emissions and guarantee eco.omical efficiency operation of the system.

关键词： Integrated energy system low-carbon eco.omic dispatch integrated demand response ladder-type carbon trading thermal co.fort elasticity

co.alt doped Fe-Mn@CNTs catalysts with highly stability for lowtemperature selective catalytic reduction of NO_(x)

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Nano Research 2022年第4期15卷 3001-3009页

作者： Pengfei Li Tiezhen Zhang Haixiao Sun Yufeng Gao Yanyuan Zhang Yuanyuan Liu Chengmin Ge Hao Chen Xiaoping Dai Xin Zhang State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of PetroleumBeijing 102249China Petrochina Daqing Petrochemical Research Center Daqing 163714China shandong DongYuan New Material Technology co. LtdDongying 257300China

In this paper,we report the fabrication of co.alt-doped de-NO_(x)catalyst by pyrolyzing an analogous metal-organic framework-74(MOF-74)co.taining Fe&*** resulted catalyst exhibits distinctive microstructures of manganese,co.alt,and iron immobilized on N-doped carbon nanotubes(CNTs).It is found through experiments that the trimetallic catalyst Fe_(2)Mn_(1)co.(0.5)/CNTs-50 has the best NH_(3)-selective catalytic reduction(SCR)*** Fe_(2)Mn_(1)co.(0.5)/CNTs-50 exhibited excellent water and sulfur resistance and good stability under the harsh gas environment of 250℃ and/or 170℃,NO=NH_(3)=1,000 ppm,8 vol.%O_(2),20 vol.%H2O,1,000 ppm SO_(2),and gas hourly space velocity(GHSV)=75,000 h^(-1).The de-NO_(x)co.version was maintained about 55%and 25%after 192 *** water and sulfur resistance performance were much higher than co.mercial vanadium series *** highly water and sulfur resistance performance may be attributed to the unique co.e-shell microstructure and the synergistic effect of manganese,co.alt,and iron which helps reduce the formation for byproducts(NH_(4)HSO_(4)).This study may promote to explore the development of a high stability catalyst for low-temperature selective catalytic reduction of NO_(x)with NH_(3).

关键词： low-temperature NH_(3)-selective catalytic reduction(SCR) metal-organic framework(MOFs) water and sulfur resistance high stability

An improved apparent permeability model co.sidering full pore pressure range,variable intrinsic permeability and slippage co.fficient

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International Journal of Mining Science and Technology 2022年第6期32卷 1233-1244页

作者： Zhiyong Xiao Changsheng Wang Gang Wang Yujing Jiang Junhong Yu shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation Shandong University of Science and TechnologyQingdao 266590China co.lege of Civil Engineering and Architecture Shandong University of Science and TechnologyQingdao 266590China co.lege of Civil Engineering Fujian University of TechnologyFuzhou 350118China State Key Laboratory of Mining Disaster Prevention and co.trol co.founded by shandong Province and the Ministry of Science and Technology Shandong University of Science and TechnologyQingdao 266590China

Although the slippage effect has been extensively studied,most of the previous studies focused on the impact of the slippage effect on apparent permeability within a low pore pressure range,resulting in the inability of matching the evolution of permeability in the remaining pressure *** this paper,a new apparent permeability model that reveals the evolution of permeability under the co.bined action of effective stress and slippage in the full pore pressure range was *** this model,both intrinsic permeability and slippage co.fficient are stress *** experimental tests with pore pressure lower than 2 MPa and a test with pore pressure at about 10 MPa using co.es from the same origin under co.stant co.fining stress and co.stant effective stress are *** co.paring experimental data and another apparent permeability model,we proved the fidelity of our newly developed ***,the co.tribution factor of the slippage effect Rslip is used to determine the low pore pressure limit with significant slippage *** results show that both narrow initial pore size and high effective stress increase the critical pore ***,the evolutions of the slippage co.fficient and the intrinsic permeability under different boundary co.ditions were analyzed.

关键词： Slippage effect Apparent permeability co.tribution factor Critical pore pressure Intrinsic permeability

Optimal co.trol of a nonlinear state-dependent impulsive system in fed-batch process

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生物数学学报:英文版 2023年第8期16卷 297-324页

作者： Chongyang Liu Guoqing Shi Gang Liu Dianzhong Hu School of Mathematics and Information Science shandong Technology and Business University Yantai 264005 P.R.China School of co.puter Science and Technology shandong Technology and Business University Yantai 264005 P.R.China Yantai Haiyi Software co. Ltd.Yantai 264000P.R.China

Optimal co.trol technique is crucial to improve the yield of microbial fermentation *** this paper,we propose a nonlinear co.trol system with state-dependent impulses,where the impulsive volume of feeding glycerol and the critical co.centration of glycerol for occurring impulse are the co.trol variables,to formulate 1,3-propanediol(1,3-PD)fed-batch production *** also discuss a quantity of important properties for this co.trol ***,we analyze the sensitivity of system state with respect to the kinetic *** further propose a co.strained optimal co.trol model governed by the co.trol system with state-dependent *** existence of the optimal impulsive co.trols is *** solving this problem,we utilize an exact penalty method to transform the problem into an optimization problem with only box ***,an improved differential evolution method is developed to seek the optimal impulsive ***,numerical simulation results demonstrate that,by using the optimal impulsive strategies,final 1,3-PD co.centration is co.siderably increased under the nominal parameter values and disturbances of kinetic parameters have significant effects on the optimal final 1,3-PD yield.

关键词： State-dependent impulsive system sensitivity analysis optimal co.trol differential evolution fed-batch culture

Rapid Launch of Medium-Sized Solid Carrier Rockets at Sea With High Reliability and co.venient Intelligence

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Aerospace China 2023年第4期24卷 31-38页

作者： YU Jichao BU Xiangwei ZHAO Jiahao HUANG Shuai ZHAO Pengfei Orienspace Technology(shandong)co. LtdBeijing 100076 shandong co.lege of Tourism and Hospitality Jinan 250200

Gravity-1 solid-propellant carrier rocket utilizes a three-vertical testing and launch mode, and adopts a sea-based launch method. As the demand for satellite launches co.tinues to grow, the scarcity of launch site resources,and the co.sideration of co.t savings, the need for rapid testing and launch of carrier rockets has beco.e increasingly strong. The capability of rapid testing and launch has even beco.e one important aspect of evaluating a rocket. This paper focuses on the characteristics of the Gravity-1 solid-propellant strap-on medium-sized carrier rocket and designs and implements a highly reliable, co.venient, and intelligent low-co.t rapid testing and launch solution. The main aspects include the design of a highly reliable dual-redundant ground architecture and the application of ground-based shelf products.

关键词： carrier rocket sea-based launch redundant design rapid testing and launch