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A novel compilation method of comprehensive mission spectrum of aero-engine maneuvering load based on use-related mission segment

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Chinese Journal of Aeronautics 2023年第3期36卷 161-170页

作者： Xuming NIU qi LU Zhigang SUN Yingdong song Jiangsu Province Key Laboratory of Aerospace Power System and College of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Laboratory of Aero-Engine Thermal Environment and Structure Ministry of Industry and Information Technology College of Energy and Power EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China College of Energy and Power Engineering and State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Comprehensive Mission Spectrum(CMS)of an aero-engine can reflect the usage characteristics of the *** can provide load input for engine life prediction and accelerated mission *** this paper,a novel compilation method of CMS of aero-engine maneuvering load based on mission segment is ***,the use-related Typical Mission Segment(TMS)of maneuvering load is divided and identified according to spectral ***,the mathematical model of different kinds of TMS are established based on stochastic process ***,the CMS of maneuvering load is compiled based on *** proposed method can accurately quantify the compilation of *** compiled CMS shows good agreement with the original load *** to damage consistency inspection,the compiled CMS is consistent with the damage caused by the original load spectrum in terms of low cycle fatigue.

关键词： Aero-engine Comprehensive mission spectrum Maneuvering load Spectrum compilation Typical mission segment

Understanding the spatial interaction of ultrasounds based on three-dimensional dual-frequency ultrasonic field numerical simulation

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China Foundry 2024年第1期21卷 29-43页

作者： Zhao-yang Yin qi-chi Le Yan-chao Jiang Da-zhi Zhao qi-yu Liao qi Zou Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

A transient 3D model was established to investigate the effect of spatial interaction of ultrasounds on the dual-frequency ultrasonic field in magnesium alloy *** effects of insertion depth and tip shape of the ultrasonic rods,input pressures and their ratio on the acoustic field distribution were discussed in ***,the spacing,angle,and insertion depth of two ultrasonic rods significantly affect the interaction between distinct *** a result,various acoustic pressure distributions and cavitation regions are *** spherical rods mitigate the longitudinal and transversal attenuation of acoustic pressure and expand the cavitation volume by 53.7%and 31.7%,respectively,compared to the plate and conical *** the input pressure will enlarge the cavitation region but has no effect on the acoustic pressure distribution *** acoustic pressure ratio significantly affects the pressure distribution and the cavitation region,and the best cavitation effect is obtained at the ratio of 2:1(P15:P20).

关键词： dual-frequency ultrasonic numerical model acoustic pressure spatial interaction magnesium alloy

Local solvability of the k-Hessian equations

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Science China Mathematics 2016年第9期59卷 1753-1768页

作者： TIAN GuJi WANG qi XU chao-Jiang Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences The School of Statistics and Mathematics Zhongnan University of Economics and Law School of Mathematics and Statistics Wuhan University Laboratoire de Math'ematiques CNRS UMR 6085 Universite de Rouen

We give a classification of second-order polynomial solutions for the homogeneous k-Hessian equation σ_k[u] = 0. There are only two classes of polynomial solutions: One is convex polynomial; another one must not be(k + 1)-convex, and in the second case, the k-Hessian equations are uniformly elliptic with respect to that solution. Based on this classification, we obtain the existence of C∞local solution for nonhomogeneous term f without sign assumptions.

关键词： k-Hessian equations local solution uniform ellipticity implicit function theorem

Detection of Penicillin via Surface Plasmon Resonance Biosensor

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Chemical Research in Chinese Universities 2012年第5期28卷 792-796页

作者： ZHANG Ying JIN Wei YANG Meng-chao ZHANG Ti-qiang ZHOU chao XIE Fei song qi REN Hao JIN qin-han MU Ying Research Center for Analytical Instrumentation Institute of Cyber-systems and ControlState Key Laboratory of Industrial Control TechnologyDepartment of Control Science and TechnologyZhejiang UniversityHangzhou 310058PR.China

A method of using Au colloid to capture the decomposed product of penicillin, penicillamine, on a surface plasmon resonance（SPR） biosensor for the quantitative determination of penicillin was developed. Based on the de-composition of penicillin to generate penicillamine and penilloaldehyde, a high sensitive biosensor for detecting penicillin was also developed. In our experiment, it was penicillamine rather than penicillin that has been measured. This is because penicillamine contains a functional group that makes it self-assembling on Au colloid to increase the molecular weight so as to improve the surface plasmon resonance signal. On a UV-Vis spectrophotometer, a high concentration of penicilliamine-Au complex was determined, indicating that penicillamine was already well combined with Au colloid. The method, using the combination of Au colloid with penicillamine, proved to detect penicillin.

关键词： Surface plasmon resonance(SPR) Biosensor Penicillamine Au colloid

巩固、发展与抗日:中央红军东征期间与各方势力之周旋

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河北学刊 2025年第1期45卷 218-224页

作者：郑康奇南开大学历史学院

1935年底,红军在陕北会师后积极进行扩红与筹粮运动。与此同时,中共中央审时度势决定进行东征,以图缓解陕北地区兵员、粮源的紧张局面。1936年2至5月,中央红军东渡黄河与阎锡山部作战,蒋介石也借机派兵进入山西。在红军东征的过程中,双... 详细信息

1935年底,红军在陕北会师后积极进行扩红与筹粮运动。与此同时,中共中央审时度势决定进行东征,以图缓解陕北地区兵员、粮源的紧张局面。1936年2至5月,中央红军东渡黄河与阎锡山部作战,蒋介石也借机派兵进入山西。在红军东征的过程中,双方高层展开了一系列的斗争与博弈。中共在东征中积极争取张学良与杨虎城部,统一战线策略取得了成功。这一时期,国际政治局势变幻莫测,中国共产党与共产国际的关系也产生了一些微妙变化。在与国际国内各方的政治博弈中,中共的政策逐渐走向成熟,为第二次国共合作奠定了重要基础。

关键词：红军东征扩红政治势力抗日战争

Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： Jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie qi Tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong Xin Wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Ductility

Self-assembled carbon monoxide nanoprodrug for chemiexcitationtriggered synergistic chemotherapy against breast cancer

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Science China Chemistry 2025年

作者： Shunfei Cui Yiyao Pan Chenzhe Ma Bin qi qingqiang Min Ming Li Huabing Chen Hengte Ke Xingyue Ji Jiangsu Province Engineering Research Center of Precision Diagnostics and Therapeutics Development College of Pharmaceutical ScienceSoochow University

Carbon monoxide（CO） has recently been well-established as a promising therapeutic modality against cancer. The development of transition-metal-free and tumor-targeted delivery platforms for CO is highly demanded but remains very sporadic. Herein, we developed a polyprodrug system for the co-delivery of CO and a chemotherapeutic agent combretastin A-4（CA-4） to the tumor site based on a chemiexcitation mechanism. Such a poly-prodrug successfully achieved the co-activation of CO and CA-4 in response to H2O2at the tumor site both in vitro and in vivo. Importantly, a synergist effect between CO and CA-4 was observed in suppressing tumor growth in a mouse tumor model. It is anticipated that such a poly-prodrug system could be potentially adapted for the co-delivery of CO and another drug payload for combinational therapy for other indications.

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Biocorrosion resistance and biocompatibility of Mg-AI layered double hydroxide/poly(L-lactic acid) hybrid coating on magnesium alloy AZ31

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Frontiers of Materials Science 2020年第4期14卷 426-441页

作者： Xiang SUN qing-song YAO Yu-chao LI Fen ZHANG Rong-Chang ZENG Yu-Hong ZOU Shuo-qi LI Corrosion Laboratory ftor Light Metals College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590China School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252059China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China

A Mg-AI layered double hydroxide(Mg-AI-LDH)coating was firstly synthesized via an in-situ steam coating growth method on the AZ31 Mg alloy,and then was modified with poly(L-lactic acid)(PLLA)via dipping and vacuum *** microstructure and composition of LDH/PLLA hybrid coating were analyzed by XRD,SEM,EDS and *** biocorrosion behavior of hybrid coating was evaluated by potentiodynamic polarization,electrochemical impedance spectroscopy(EIS)and hydrogen evolution test in the Hank's *** results showed that LDH/PLLA coatings exhibited a much dense layer compared to the unmodified Mg-AI-LDH coating with unobvious boundary between PLLA and LDH *** corrosion current density of the LDH/PLLA-10 hybrid coating decreased three orders of magnitude in comparison to its *** was proven that the existence of the PLLA coating further prolonged the service life of the Mg-AI-LDH ***'s more,the MTT assay and livel dead staining showed that the LDH/PLL A-10 coating had good biocompatibility for Mouse NIH3T3 *** formation mechanism and the anti-corrosion mechanism of hybrid coatings were proposed.

关键词： magnesium alloy layered double hydroxide poly(L-lactic acid) corrosion resistance biocompatbility

Post-synthetic modifications of MOFs by different bolt ligands for controllable release of cargoes

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Chinese Chemical Letters 2024年第10期35卷 404-407页

作者： Hao Wang Meng-qi Pan Ya-Fei Wang chao Chen Jian Xu Yuan-Yuan Gao Chuan-song qi Wei Li Xian-He Bu College of New Materials and Chemical Engineering Beijing Key Lab of Special Elastomeric Composite MaterialsBeijing Institute of Petrochemical TechnologyBeijing 102617China School of Materials Science and Engineering National Institute for Advanced MaterialsTKL of Metal and Molecule-Based Material ChemistryNankai UniversityTianjin300350China College of Chemical Engineering Inner Mongolia University of TechnologyHohhot 010051China

Post-synthetic modifications(PSM)have drawn great attention as a vigoroso tool to tune or enhance the performance of metal-organic frameworks(MOFs).However,the current PSM method usually have to sacrifice the porosity of MOFs to enrich their functionality,such as pore space partition(PSP)and postsynthetic elimination and insertion(PSE&I),causing a trade-off in this *** address this issue,we herein propose a new PSM strategy of using the size-matching ligands as the bolts to lock MOFs'pores,which could be anchored onto open metal sites(OMSs)after guest loading through a stepwise *** a result,the loaded cargoes undergo a controlled releasing process with respect to different bolt *** proposed strategy provides a promising way to balance the functionality and porosity of MOFs.

关键词： Post-synthetic modifications Metal-organic frameworks Bolting ligand Control release Cargo