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Preparation of Three-dimensional Graphene-based Sponge as Photo-thermal Conversion Material to Desalinate Seawater

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Chemical Research in Chinese Universities 2022年第6期38卷 1425-1434页

作者： ZHANG Huan liu huie CHEN Shuang ZHAO Xinxin YANG Fan TIAN Xiaowen College of Chemistry and Chemical Engineering China University of Petroleum(East China)Qingdao266580P.R.China

Water shortage has become one of the major threats to human society over the past *** new interfacial solar evaporation is undoubtedly an attracting technology to solve this ***,graphene aerogel(GA)and graphene oxide/melamine sponge composite material(GO-MS)were prepared through a two-step reduction and one-step freezing method as photo-thermal materials to evaporate pure water and *** proper concentrations of the graphene oxide(GO)dispersion for their preparation were investigated,which is 7 mg/mL for GA,and 5 mg/mL for *** evaporation rates of GA are 1.40 kg/(m^(2)·h)for pure water and 1.21 kg/(m^(2)·h)for seawater,while for GO-MS it is 1.63 kg/(m^(2)·h)for pure water and 1.45 kg/(m^(2)·h)for seawater,*** composite material not only reduces the usage of GO,but also shows better photo-thermal conversion ***,the heat loss of evaporation system was calculated and the method of further enhancing photo-thermal conversion efficiency was deduced,which will provide a strong basis for guiding the design and development of graphene based three-dimensional materials and further exploration in this field.

关键词： Graphene Melamine sponge Photo-thermal material Solar-driven evaporation Heat conduction

Fabrication of super-elastic graphene aerogels by ambient pressure drying and application to adsorption of oils

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Chinese Journal of Chemical Engineering 2022年第7期35卷 89-97页

作者： Xinxin Zhao Wenlong Xu Shuang Chen huie liu Xiaofei Yan Yan Bao Zexin liu Fan Yang Huan Zhang Ping Yu State Key Laboratory of Heavy Oil Processing China University of Petroleum(Huadong)Qingdao 266580China Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China

Three-dimensional graphene-based aerogels have promising applications in oil adsorption and environmental ***,current research of graphene-based aerogels is often hindered by high preparation cost,poor mechanical properties and low recycling ***,superelastic graphene aerogel(SGA)was prepared through one-step freezing and twice hydrothermal reduction followed by drying under ambient *** simple atmospheric drying provides a possibility for large-scale preparation of high performance graphene-based *** prepared SGA not only has the ability of highly repeatable compression rebound,but also exhibits excellent oil adsorption *** the overall performance of SGA is better than most of graphenebased aerogels prepared by freeze *** the SGA was cyclically compressed with 70%strain for 300 times,it can return to the original shape and height *** retained about 90%of the initial adsorption capacity after 50 cycles of adsorption and compression regeneration for cyclohexane.

关键词： Graphene aerogels Super-elastic Ambient pressure drying Adsorption and regeneration of oil

Fluidization in combined acoustic-magnetic field for mixtures of ultrafine particles

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China Particuology 2007年第1期5卷 111-115页

作者： huie liu Qingiie Guo State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical Engineering China University of Petroleum Dongying 257061 Shandong China

Four kinds of SiO2 （5-10 nm）＋ Fe3O4 （44.8 μm） particle were fluidized in a sole acoustic field, a sole magnetic field and a combined acousticmagnetic field. Introduction of a single field, 100 dB/40-60 Hz acoustic or 10 mT magnetic, could suppress plugging and channeling and reduce the superficial minimum fluidization gas velocities, Umf. Combination of both acoustic and magnetic fields demonstrated even more promising results, especially more significant reduction of Umf.

关键词： Ultrafine particle Combined acoustic-magnetic field Acoustic field Magnetic field

Significant genomic introgression from grey junglefowl(Gallus sonneratii)to domestic chickens(Gallus gallus domesticus)

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Journal of Animal Science and Biotechnology 2024年第4期15卷 1482-1493页

作者： Xiurong Zhao Junhui Wen Xinye Zhang Jinxin Zhang Tao Zhu huie Wang Weifang Yang Guomin Cao Wenjie Xiong Yong liu Changqing Qu Zhonghua Ning Lujiang Qu National Engineering Laboratory for Animal Breeding College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin Xinjiang Production and Construction CorpsTarim UniversityAlar 843300China Beijing Municipal General Station of Animal Science Beijing 100107China Animal husbandry station of Fangchenggang FangchenggangGuangxi Province 538001China Animal Disease Prevention and Control Center of Fangchenggang FangchenggangGuangxi Province 538001China Beijing Agricultural Effect Poultry Industry Co. Ltd.Beijing 101100China Engineering Technology Research Center of Anti‑aging Chinese Herbal Medicine of Anhui Province Fuyang Normal UniversityFuyangAnhui 236037China

Background Chicken is one of the most numerous and widely distributed species around the world,and many studies support the multiple ancestral origins of domestic *** research regarding the yellow skin phenotype in domestic chickens(regulated by BCO2)likely originating from the grey junglefowl serves as crucial evidence for demonstrating the multiple origins of ***,beyond the BCO2 gene region,much remains unknown about the introgression from the grey junglefowl into domestic ***,in this study,based on wholegenome data of 149 samples including 4 species of wild junglefowls and 13 local domestic chicken breeds,we explored the introgression events from the grey junglefowl to domestic *** We successfully detected introgression regions besides BCO2,including two associated with growth trait(IGFBP2 and TKT),one associated with angiogenesis(TIMP3)and two members of the heat shock protein family(HSPB2 and CRYAB).Our findings suggest that the introgression from the grey junglefowl may impact the growth performance of ***,we revealed introgression events from grey junglefowl at the BCO2 region in multiple domestic chicken breeds,indicating a phenomenon where the yellow skin phenotype likely underwent strong selection and was ***,our haplotype analysis shed light on BCO2 introgression event from different sources of grey junglefowl into domestic chickens,possibly suggesting multiple genetic flows between the grey junglefowl and domestic *** In summary,our findings provide evidences of the grey junglefowl contributing to the genetic diversity of domestic chickens,laying the foundation for a deeper understanding of the genetic composition within domestic chickens,and offering new perspectives on the impact of introgression on domestic chickens.

关键词： BCO2 Domestic chickens Grey junglefowl Introgression

Frequency Regulation of VSC-MTDC System with Offshore Wind Farms

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 275-286页

作者： Haoyu liu Chongru liu North China Electric Power University Beijing 102206China

Frequency regulation of voltage source converter-based multi-terminal high-voltage direct current(VSC-MTDC)system with offshore wind farms enhances the frequency stability by compensating the power for a disturbed AC ***,it is difficult to reasonably allocate frequency-regulation resources due to a lack of coordination mechanisms between wind farms and the MTDC ***,it is difficult for the frequency control of the wind farms to manage changes in wind speed;and the risk of wind-turbine stalls is ***,based on the kinetic energy of wind turbines and the power margin of the converters,the frequency-regulation capability of wind turbines is evaluated,and a dynamic frequency-support scheme considering the real-time frequency-support capability of the wind turbines and system frequency evolution is proposed to improve the frequency-support performance.A power adaptation technique at variable wind speeds is developed;the active power in the frequency-support stage and restoration stage is switched according to the wind speed.A hierarchical zoning frequency-regulation scheme is designed to use the frequency-regulation resources of different links in the MTDC system with wind *** simulation results show that the novel frequency-regulation strategy maintains frequency stability with wind-speed changes and avoids multiple frequency dips.

关键词： Wind generation voltage source converter-based multi-terminal high-voltage direct current(VSC-MTDC) frequency regulation cooperative control adaptive control variable wind speed

A Novel Design of a Pre-separation Panel Structure to Protect Against the Impact of an Explosion in an Aircraft Plenum Chamber

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Acta Mechanica Solida Sinica 2024年第1期37卷 166-180页

作者： Zongxing liu Xiang Yang Jun liu School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China COMAC Shanghai Aircraft Design and Research Institute Shanghai 201210China

To reduce the damage of the pressurizing panel structure of a fuselage caused by an explosion at the“least risk bomb location”in an aircraft structure,a new pre-separation panel structure was designed to resist blast ***,the dynamic strain response and morphology of impact damage of the new pre-separation panel were measured in an impact damage ***,the commercial software LS-DYNA was used to calculate the propagation of the blast shock wave,and the results were compared with empirical equations to verify the rationality of the numerical calculation ***,the fluid–structure coupling method was used to calculate the damage process of the pre-separation panel structure under the impact of an explosion wave and an impact *** calculated results were in good agreement with the test results,which showed the rationality of the calculation method and the *** residual strength of the damaged pre-separation panel was significantly higher than that of the original damaged *** results show that the new pre-separation panel structure is reasonable and has certain significance for guiding the design of plenum chambers with strong resistance to implosion for aircraft fuselages.

关键词： Pre-separation panel structure Explosive response Residual strength Aircraft plenum chamber Least risk bomb location

Effectiveness and safety of acupuncture in treatment of pregnancyrelated symptoms:a systematic review and Meta-analysis

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Journal of Traditional Chinese Medicine 2024年第1期44卷 16-26页

作者： liu Tingting liu Tongou liu Mingfu School of Traditional Chinese Medicine Clinical Medicine Hubei University of Traditional Chinese MedicineWuhan 430000China First Clinical College of Hubei University of Traditional Chinese Medicine Wuhan 430000China Department of Acupuncture and Tuina Affiliated Hospital of Hubei University of Traditional Chinese MedicineHubei Provincial Hospital of Traditional Chinese MedicineWuhan 430000China

OBJECTIVE:To systematically evaluate the efficacy and safety of acupuncture(AM)in the treatment of pregnancyrelated symptoms such as acute vomiting during ***:We comprehensively searched the available literature up to November 2021,including Pub Med,Embase,Cochrane Library,Chinese Biomedical Literature Database,and China National Knowledge Infrastructure Database,for randomized controlled trials(RCTs)on AM for the treatment of severe vomiting,insomnia,pharyngeal and pelvic pain,mood abnormalities,and dyspepsia during ***:Sixteen RCTs with a cumulative sample size of 1178 cases were *** these,964 patients were included in the *** Meta-analysis results showed that AM was more efficient than Western medicine in treating discomfort during pregnancy[odds ratio(OR)=1.19,95%confidence interval(CI)(1.11,1.28),P<0.01].AM was better than the control group in improving the visual analog scale scores[standard mean difference(SMD)=0.62,95%CI(0.53,0.71),P<0.01].AM was superior to the control group in improving Numerical Rating Scale(NRS)symptom scores[OR=7.31,95%CI(3.36,15.94),P<0.01].There was no significant difference in adverse effects between the AM and sham-AM groups and the analgesic drug group[OR=0.70,95%CI(0.39,1.28),P=0.25],but the treatment and control groups had mild adverse effects with a low ***:AM is more effective than other treatments or pharmacotherapy alone in the treatment of pregnancy-related symptoms,and is relatively ***,the quality of the included trials was rather poor,and high-quality studies are required to confirm our findings.

关键词： acupuncture pregnancy nausea vomiting sleep initiation and maintenance disorders low back pain pelvic pain mood abnormalities Meta-analysis systematic review

Stochastic Unit Commitment with High-Penetration Offshore Wind Power Generation in Typhoon Scenarios

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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 535-546页

作者： Yanqi liu Dundun liu Hongcai Zhang State Key Laboratory of Internet of Things for Smart City and Department of Electrical and Computer Engineering University of MacaoMacao 999078China University of Macao Zhuhai UM Science and Technology Research Institute ZhuhaiChina

To tackle the energy crisis and climate change,wind farms are being heavily invested in across the *** China's coastal areas,there are abundant wind resources and numerous offshore wind farms are being *** secure operation of these wind farms may suffer from typhoons,and researchers have studied power system operation and resilience enhancement in typhoon ***,the intricate movement of a typhoon makes it challenging to evaluate its spatial-temporal *** published papers only consider predefined typhoon trajectories neglecting *** address this challenge,this study proposes a stochastic unit commitment model that incorporates high-penetration offshore wind power generation in typhoon *** adopts a data-driven method to describe the uncertainties of typhoon trajectories and considers the realistic anti-typhoon mode in offshore wind farms.A two-stage stochastic unit commitment model is designed to enhance power system resilience in typhoon *** formulate the model into a mixed-integer linear programming problem and then solve it based on the computationally-efficient progressive hedging algorithm(PHA).Finally,numerical experiments validate the effectiveness of the proposed method.

关键词： Unit commitment two-stage stochastic programming offshore wind farm typhoon

Experimental and numerical study on ignition and combustion characteristics of boron-magnesium composite powders

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Particuology 2024年第1期84卷 12-29页

作者： Shuyuan liu Luyang Han Hongmei liu Yingkai Song Linlin liu Songqi Hu Science and Technology on Combustion Internal Flow and Thermo-Structure LaboratoryNorthwestern Polytechnical UniversityXi'an710072China School of Mechanical Engineering and Rail Transit Changzhou UniversityChangzhou213164China Shanghai Institute of Space Propulsion Shanghai201112China Shanghai Engineering Research Center of Space Engine Shanghai201112China

A high-pressure laser ignition and combustion system with adjustable oxidizer gas atmosphere is established to investigate the ignition and combustion characteristics of boron-magnesium(BM)com-posite *** ignition and combustion model of BM powders is established and validated in the present *** results show that increasing water content,O_(2) content and Mg content all result in shorter ignition delay time of BM powders,among which the effect of water content is the most ***,ignition delay time increases as pressure *** combustion time decreases with increasing Mg content and ambient pressure but increases with water *** the increase of O_(2) content,combustion time of BM powders first increases and then decreases,which means a critical O_(2) content exists above which combustion time *** results show that there exists a trade-off between ignition and combustion performance of BM composite powders.

关键词： Boron magnesium powder Laser ignition Ignition and combustion model Reaction mechanism Numerical model