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Zoological Research 2021年第4期42卷 514-524页

作者： De-Zhe Qin hui Cai Cen He Dong-hui Yang Jing Sun Wen-Lai He Ba-Lun li Jin-lian Hua Sha Peng College of Veterinary Medicine Shaanxi Centre of Stem Cells Engineering&TechnologyNorthwest A&F UniversityYanglingShaanxi 712100China

Normal spermatogenic processes require the scrotal temperature to be lower than that of the body as excessive heat affects spermatogenesis in the testes,reduces sperm quality and quantity,and even causes *** reticulum stress(ERS)is a crucial factor in many *** several studies have linked ERS to heat stress,researchers have not yet determined which ERS signaling pathways contribute to heat-induced testicular *** activates antioxidant enzymes,scavenges free radicals,and protects the testes from inflammation;however,few studies have reported on the influence of melatonin on heat-induced testicular *** a murine model of testicular hyperthermia,we observed that heat stress causes both ERS and apoptosis in the testes,especially in the *** observations were confirmed using the mouse spermatocyte cell line GC2,where the Atf6 and Perk signaling pathways were activated during heat *** of the above genes effectively reduced spermatocyte damage caused by heat *** with melatonin alleviated heat-induced apoptosis by inhibiting the Atf6 and Perk signaling *** mitigation was dependent on the melatonin *** vivo experiments verified that melatonin treatment relieved heat-induced testicular *** conclusion,our results demonstrated that ATF6 and PERK are important mediators for heat-induced apoptosis,which can be prevented by melatonin ***,our study highlights melatonin as a potential therapeutic agent in mammals for subfertility/infertility induced by testicular hyperthermia.

关键词： Heat stress ATF6 PERK Melatonin Spermatocyte

Evaluation of the stability of vegetated slopes according to layout and temporal changes

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Journal of Mountain Science 2021年第1期18卷 275-290页

作者： li Yun-peng HU Chao JIAN li ZHAO Ran li chen China Academy of Transportation Sciences Beijing 100029China. Qilu Transportation Development Group Jinan 250101China

Vegetation in slopes can effectively improve slope ***,it is difficult to estimate the effects of vegetation on slope stability because of variations in plant species and environmental ***,influences of plant growth on slope stability change with time,resulting in changes in the safety *** study was conducted to evaluate the stability of vegetated slopes with time and investigate the effects of different layouts of plant species on slope ***,we used a plant growth model and slope stability analysis to build an evaluation *** accomplish this,one species of tree,shrub and grass was chosen to set six layout patterns.A slope with no vegetation served as a *** safety factors of the seven slopes were then calculated using the developed evaluation model and differences in the safety factors of slopes were compared and *** slope vegetated with Platycladus orientalis reached the most stable state at the age of 60 *** slope(Vitex negundo)had the maximum safety factor after 20 ***,the safety factor of vegetated slopes increased from 12.1%to 49.6% compared to the slope with no *** wind force was considered,the safety factor value of the slope changed from 3.5%to 43.5%.Vegetation mixtures of trees and grasses resulted in the best slope *** grasses on slopes can improve slope stability of trees to a greater degree than that of slopes with shrubs in the early stage of growth.

关键词： Plant growth model Vegetated slope Slope stability Safety factor

Load Shedding Control Strategy in Power Grid Emergency State Based on Deep Reinforcement Learning

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CSEE Journal of Power and Energy Systems 2022年第4期8卷 1175-1182页

作者： Jian li Sheng chen Xinying Wang Tianjiao Pu China Electric Power Research Institute Haidian DistrictBeijing 100192China

In viewing the power grid for large-scale new energy integration and power electrification of power grid equipment,the impact of power system faults is increased,and the ability of anti-disturbance is decreased,which makes the power system fault clearance more *** this paper,a load shedding control strategy based on artificial intelligence is proposed,this action strategy of load shedding,which is selected by deep reinforcement learning,can support autonomous voltage ***,the power system operation data is used as the basic data to construct the network training dataset,and then a novel reward function for voltage is *** value function,which conforms to the power grid operation characteristics,will act as the reward value for deep reinforcement learning,and the Deep Deterministic Policy Gradient algorithm(DDPG)algorithm,with the continuous action strategy,will be ***,the deep reinforcement learning network is continuously trained,and the load shedding strategy concerning the grid voltage control problem will be obtained in the power system emergency control situation,and this strategy action is input into the Pypower module for simulation verification,thereby realizing the joint drive of data and *** to the numerical simulation analysis,it shows that this method can effectively determine the accurate action selection of load shedding,and improve the stable operational ability of the power system.

关键词： Artificial intelligence deep reinforcement learning load shedding control power system emergency state

Investigation of the Laminar Premixed n-Propylamine Flame

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Journal of Thermal Science 2022年第3期31卷 854-866页

作者： li Wang chen Jintao YANG Jiuzhong TIAN Zhenyu Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China National Synchrotron Radiation Laboratory University of Science and TechnologyHefei230029China

The laminar premixed n-propylamine(NPA)flame with equivalence ratio of 1.70 has been investigated at 4666.28 Pa using tunable synchrotron photoionization and molecular-beam mass spectrometry *** structures and mole fractions of 40 species were ***,allylamine,butadiyne,vinylacetylene,1,3-butadiene,1-butene,2-butene,n-butyl radical,1,3-cyclopentadiene,cyclopentene,2-pentene,benzene,toluene,ethylbenzene,2-propen-1-imine,cyclopropanimine,pyrrole,2-butenenitrile and n-butylamine were newly identified in the amine *** fraction profiles of some species including reactants,intermediates and products in the NPA flame were *** and N_(2)were observed as the primary N-containing products in the NPA flame,which was different from the result that NO was the major N-containing products in previous studies of nitrogen *** bond energies of NPA were calculated through quantum chemistry calculations on the basis of density functional theory at the CBS-QB3 *** showed that the CH_(3)CH_(2)-CH_(2)NH_(2)bond was the weakest and NPA mainly decomposed to CH_(2)NH_(2)and C_(2)H_(5)*** H-abstractions at C_(α)by OH/O(NPA+OH=CH_(3)CH_(2)CHNH_(2)+H_(2)O and NPA+O=CH_(3)CH_(2)CHNH_(2)+OH)had significant promoting effects on NPA *** N conversion chain of NPA under flame conditions was proposed and detailed analysis with respect to intermediates especially the nitrogen-containing species were *** results will enrich the understanding of NPA flame and are essential to further establish the kinetic mechanism.

关键词： n-propylamine low-pressure laminar premixed flame intermediates mole fraction quantum chemistry calculation molecular beam mass spectrometry

Flurbiprofen microneedle patches for the management of acute postoperative pain

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Nano Research 2024年第8期17卷 7493-7503页

作者： Huaqing Chu Yanyan Zhang Yuan Yang Jiangtao Xue Cong li Wei Zhang Zhou li hui Zheng National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases School of Integrated Chinese and Western MedicineHunan University of Chinese MedicineChangsha 410208China School of life Science Institute of Engineering MedicineBeijing Institute of TechnologyBeijing 100081China Institute of Process Engineering Chinese Academy of SciencesBeijing 100190China

Acute postoperative pain is commonly treated with flurbiprofen(FBP),but conventional delivery methods are *** study prepared a new non-burst release microneedles(MNs)using genipin cross-linked gelatin(cGel).By adding varying amounts of genipin to modulate the crosslinking degree of cGel,the drug release behavior of the drug-loaded MNs in the skin can be *** crosslinking parameters that meet therapeutic requirements are selected,thus providing rapid and longlasting analgesic *** solutions were successfully cross-linked,altering matrix material microstructure,confirmed by scanning electron microscope imaging and fourier transform infrared *** demonstrated increasing mechanical strength with higher *** release rates were rapid initially,then slowed,exhibiting a characteristic of decreased release rates with increasing degrees of *** vivo,FBP/cGel MNs significantly reduced allodynia and hyperalgesia post-surgery,with the greatest effect observed at 2–3 h post-surgery,and can maintain analgesia for up to 6 *** tests confirmed good ***/cGel MNs effectively penetrate the stratum corneum,safely delivering drugs with significant analgesic effects,excellent mechanical properties,and good biocompatibility,representing a promising strategy for managing acute postoperative pain.

关键词： microneedle postoperative pain flurbiprofen non-steroid anti-inflammatory drug cross-linked gelatin

High Selectivity Cascaded Quadruplet Bandpass Filter with Three Pairs of Transmission Zeros

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Chinese Journal of Electronics 2017年第5期26卷 1101-1104页

作者： chen Jianfeng chen Fuchang li Runshuo XIE Zeming CHU Qingxin School of Electronic and Information Engineering South China University of Technology

A novel microstrip Cascaded quadruplet(CQ) bandpass filter using quarter wavelength resonators and three-quarter wavelength resonators is *** on cross coupling and source-load coupling,three pairs of finite transmission zeros are generated at the *** a result,the out-of-band rejection can be enhanced and high selectivity is *** on the proposed structure,a cascaded quadruplet filter centering at 3.0GHz is designed and *** agreement between the measured and simulated data is obtained.

关键词： Cascaded quadruplet(CQ) Bandpass filter Cross coupling Transmission zeros Microstrip

Finite-time fault-tolerant control of teleoperating cyber physical system against faults

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Journal of Systems Engineering and Electronics 2023年第2期34卷 469-478页

作者： PAN chengwei liU Xia chen Yong li Meng School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Institute of Electric Vehicle Driving System and Safety Technology University of Electronic Science and Technology of ChinaChengdu 611731China School of Electrical Engineering and Electronic Information Xihua UniversityChengdu 610039China

This paper studies a finite-time adaptive fractionalorder fault-tolerant control(FTC)scheme for the slave position tracking of the teleoperating cyber physical system(TCPS)with external disturbances and actuator *** on the fractional Lyapunov stability theory and the finite-time stability theory,a fractional-order nonsingular fast terminal sliding mode(FONFTSM)control law is proposed to promote the tracking and fault tolerance performance of the considered ***,the adaptive fractional-order update laws are designed to cope with the unknown upper bounds of the unknown actuator faults and external ***,the finite-time stability of the closed-loop system is ***,comparison simulation results are also provided to show the validity and the advantages of the proposed techniques.

关键词： teleoperating cyber physical system(TCPS) fractional Lyapunov stability fault-tolerant control(FTC) finite-time stability

Recent Advances on Polyoxometalate-Based Ion-Conducting Electrolytes for Energy-Related Devices

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Energy & Environmental Materials 2023年第2期6卷 262-274页

作者： Dongming cheng Ke li Hongying Zang Jiajia chen Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education at Universities of Jilin Province Faculty of ChemistryNortheast Normal UniversityChangchun 130024China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringCollaborative Innovation Centre of Chemistry for Energy MaterialsXiamen UniversityXiamen 361005China

Solid-state electrolytes have attracted considerable attention in new energyrelated devices due to their high safety and broad application ***(POMs)are a kind of molecular-level cluster compounds with unique *** recent years,owing to their abundant physicochemical properties(including high ionic conductivity and reversible redox activity),POMs have shown great potential in becoming a new generation of solid-state *** this review,an overview is investigated about how POMs have evolved as ion-conducting materials from basic research to novel solid-state electrolytes in energy ***,some expressive POM-based ion-conducting materials in recent years are introduced and classified,mainly inspecting their structural and functional *** that,it is further focused on the application of these ionconducting electrolytes in the fields of proton exchange membranes,supercapacitors,and ion *** addition,some properties of POMs(such as inherent dimension,capable of forming stable hydrogen bonds,and reversible bonding to water molecules)enable these functional POM-based electrolytes to be employed in innovative applications such as ion selection,humidity sensing,and smart ***,some fundamental recommendations are given on the current opportunities and challenges of POM-based ion-conducting electrolytes.

关键词： energy devices ion conduction polyoxometalates solid-state electrolytes

An efficient and authenticated key establishment scheme based on fog computing for healthcare system

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Frontiers of Computer Science 2022年第4期16卷 173-184页

作者： Xinghua li Ting chen Qingfeng cheng Jianfeng Ma School of Cyber Engineering Xidian UniversityXi’an710071China

Because of its closeness to users,fog computing responds faster than cloud ***,it has been deployed to various applications,such as healthcare ***,to ensure the secure communication of the fog-based healthcare system,Jia et *** an authenticated key agreement ***,in view of the high computation cost existing in Jia et al.’s scheme,Ma et *** an efficient one using elliptic curve *** this paper,we observe that both the two schemes may potentially risk ephemeral key compromise attacks and need ***,to overcome this potential risk,we propose a new authenticated scheme based on Jia et al.’s scheme using elliptic curve computational Diffie-Hellman hypothesis and hash ***,we provide provable security under the adopted adversarial model and ProVerif simulation,and also analyze the performance in terms of computation and communication costs by *** analysis results show that the improved scheme resists the common attacks,reduces computation overhead,and has a certain significance.

关键词： authenticated key establishment ephemeral key compromise attack fog-driven healthcare system elliptic curve cryptography provable security ProVerif simulation

Application of Et_3NHCl-AlCl_3 Ionic liquid as an Initiator in Cationic Copolymerization of 1, 3-Pentadiene with Styrene

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Chinese Chemical Letters 2006年第1期17卷 117-120页

作者： Yuan Yuan WANG hui SUN Juan li Dong JIANG li Yi DAI Center for the Chemistry of Ionic liquids East China Normal University （E.C.N.U） Shanghai 200062

The random copolymer poly （1, 3-pentadiene-co-styrene） formed through cationic copolymerization using the ~ethylamine hydrochloride and hydrous aluminium chloride （Et3NHCl-AlCl3） room temperature ionic liquid as initiating agent in toluene was analyzed using IR spectra in conjunction with gel permeation chromatography （GPC）. The room temperature ionic liquid was found to have high initiatic activity for copolymerization.

关键词： Et3NHCl-AlCl3 ionic liquid 1 3-pentadiene styrene cationic copolymerization.