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Chinese Chemical Letters 2014年第12期25卷 1550-1554页

作者： Meng-Juan Liab yan-Hong Huangb An-qi Jub Tian-Shi Yub Ming-qiao Geab Key Laboratory of Eco-Textiles(Jiangnan University) Ministry of Education College of Textile  Clothing Jiangnan University

This work aimed at effectively utilizing the chemically depolymerized waste poly（ethylene terephthalate）（PET） fibers into useful products for the textile *** fibers were glycolytically degraded by excess ethylene glycol as depolymerizing agent and zinc acetate dihydrate as *** glycolysis product,bis（2-hydroxyethyl） terephthalate（BHET）,was purified through repeated crystallization to get an average yield above 80%.Then,BHET was nitrated,reduced,and azotized to get diazonium ***,the produced diazonium salt was coupled with 1-（4-sulfophenyl）-3-methyl-5-pyrazolone to get azo *** structures of BHET and azo dyestuff were identified by FT1 R and ^1H NMR spectra and elemental *** filaments dyed by the synthesized azo dyestuff with the dye bath pH from 4.14 to 5.88 showed bright yellow *** performances of the dyestuff were described with dye uptake,color fastness,K/S,L^＊,a^＊,b^＊.and △E^＊ values.

关键词： Waste PET fibers Depolymerization Bis(2-hydroxyethyl) terephthalate Azo dyestuff

A Simplified Control Method to Achieve Stable and Robust Quadrupedal Quasi-passive Walking with Compliant Legs

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Journal of Bionic Engineering 2016年第4期13卷 585-599页

作者： qiao Sun Feng Gao Chenkun qi Xianbao Chen State Key Laboratory of Mechanical System and Vibration Shanghai Jiaotong University Shanghai 200240 China

The principle of passive dynamic walking has drawn lots of attentions in the field of robotics for it provides a possibility to realize natural walking. However, stabilizing the quadrupedal passive walking remains challenging. In this paper, a novel control method is proposed to stabilize the quadrupedal quasi-passive walking. Inspired by biological concepts, this method treats the foreleg pair and hindleg pair as two bipedal walkers, and a virtual model controller is designed to maintain the quasi-passive walking of each bipedal walker independently. This control method was then verified by a planar quadrupedal model with compliant legs, which successfully achieved stable periodical walking gaits. It was found that although being con- trolled independently, the movement of fore and hind leg pairs still formed a time-invariant phase shift, showing remarkable resemblance to that of a walking horse. We fiarther analyzed the influences of varying factors on the gait characteristics and stability. These analyses show the control method is robust since it can stabilize the gaits within a wide range of leg compliance parameters and resist considerably large disturbances. In addition, the optimal ranges of the leg compliance parameters for the largest stability margin were also found in this study.

关键词： quadrupedal walking quasi-passive walking leg compliance independent control

Realizing the air brazing of ZrO_(2) ceramics through Al metal

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Journal of Materiomics 2022年第3期8卷 662-668页

作者： Yaotian yan Baishen Liu Tianxiong Xu Liang qiao Shaohua qin Jian Cao Junlei qi State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin150001China Key Laboratory of Materials Design and Quantum Simulation College of ScienceChangchun UniversityChangchun130022China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China

The exploration towards cost-effective filler metal for ceramics joining has always been the key issues for ceramics ***,we reveal that the Al metal prefers to spread on the ZrO_(2) based ceramic under the air heating condition,due to the geometric limit effects by in-situ formed dense Al2O3 *** by this,the joining of ZrO_(2) based ceramics was realized in air with Al metal as filler,through the diffusion of Al towards ceramic *** Al element can induce obvious interfacial bonding effect on Al2O3 layer and ZrO_(2) ceramic,where the hybridization among the Al-p,Zr-d and O-p orbitals plays a key *** in-situ formed Al2O3 layer on Al filler surface is vital for forming the fine interface(shear strength of~36 MPa),which results in the relief of lattice mismatch and peak stress at ceramic-filler metal transition interface.

关键词： Ceramics Density functional theory Interfacial behavior Diffusion

The Construction and Application of Work and Production Resuming Behavior System Dynamics Evolutionary Game Regulation and Control Model

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Journal of Systems Science and Information 2023年第2期11卷 160-178页

作者： qiao HU Jiayin qi School of Business and Management Shanghai International Studies UniversityShanghai 201620China School of Cyberspace Security Guangzhou UniversityGuangzhou 510006ChinaKey Laboratory of Trustworthy Distributed Computing and Service(BUPT)Ministry of EducationBeijing 100084China

The resumption of production after the“suspension”caused by the COVID-19 has emerged as an urgent problem for many enterprises and the *** resumption of production is actually a dynamic evolution problem from 0 to 1(100%).This paper constructs a general game model and a dynamic replication system for the resumption of production and government support,and gives theorems for the construction of the *** analyzes the evolution mechanism and scenario conditions for the convergence of enterprise strategies to the“resumption of production”strategy,takes the resumption of production of hog farmers as an example to carry out a study on the regulation of countermeasures to resume hog production,and explores systemic countermeasures and suggestions for the rapid convergence of farmers’strategies to the“resumption of work and production”*** study found that the production resuming behavior system dynamics evolution game regulation model provides a systematic model and method for the study of resumption countermeasures,a general regulation model for the resumption ratio from 0 to 1(100%),and a systematic idea,method and model for exploring the“precise strategy”system to promote the rapid resumption of production.

关键词： the resumption of production system dynamics evolutionary game regulation and control model simulation

Properties of a reaction-bonded β-SiAlON ceramic doped with an FeMo alloy for application to molten aluminum environments

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International Journal of Minerals,Metallurgy and Materials 2015年第5期22卷 530-536页

作者： yan-jun Li Hai-liang Yu Hai-yun Jin Zhong-qi Shi Guan-jun qiao Zhi-hao Jin State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University School of Materials Science and Engineering Jiangsu University

An FeMo-alloy-doped β-SiA1ON （FeMo/β-SiA1ON） composite was fabricated via a reaction-bonding method using raw materials of Si, Al2O3, A1N, FeMo, and Sm2O3. The effects of FeMo on the microstructure and mechanical properties of the composite were investi- gated. Some properties of the composite, including its bending strength at 700℃ and after oxidization at 700℃ for 24 h in air, thermal shock resistance and corrosion resistance to molten aluminum, were also evaluated. The results show that the density, toughness, bending strength, and thermal shock resistance of the composite are obviously improved with the addition of an FeMo alloy. In addition, other properties of the composite such as its high-temperature strength and oxidized strength are also improved by the addition of FeMo alloy, and its corrosion re- sistance to molten aluminum is maintained. These findings indicate that the developed FeMo/β-SiA1ON composite exhibits strong potential for application to molten aluminum environments.

关键词： composite materials SiAION ceramics iron molybdenum alloys reaction bonding mechanical properties molten aluminum

Mechanism Exploration of Euphorbia fischeriana Steud. for Liver Cancer Based on Aspartic Acid Identification in Metabolomics

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Chinese Journal of Integrative Medicine 2024年第6期30卷 507-514页

作者： ZHAO Jing TIAN Xin-chen ZHANG Jia-qi HUANG Chen SUN yan qiao Sen JIANG Shu-long Clinical Medical Laboratory Center Jining First People’s HospitalJiningShandong Province272000China Cheeloo College of Medicine Shandong UniversityJinan250000China

Objective:To investigate the anti-liver cancer effects and aspartic acid(Asp)-related action mechanism of Euphorbia fischeriana Steud.(LD).Methods:The mice model of liver cancer was established by injection of H22 *** 5 days,mice were randomly divided into model group,sorafenib group(20 mg/kg),LD high-dose(LDH,1.36 g/kg) group,LD medium-dose(LDM,0.68 g/kg) group,and LD low-dose(LDL,0.34 g/kg)group,10 mice each *** were intragastrically administered to the mice once daily for 10 days,*** weight,tumor size and tumor weight were *** index was *** changes of liver cancer tissues were evaluated by hematoxylin and eosin staining and TUNEL *** chromatography-mass spectrometer was used to analyze different metabolites between the model and LDH ***:After LD treatment,tumor weight,tumor size and hepatic index were reduced compared with the model *** and karyorrhexis of tumor cells were ***,61 differential metabolites(18 up-regulated,43 down-regulated) were affirmed and 20 pathways of KEGG(P<0.05) were *** addition,Bel-7402,HepG2 and H22 cell viabilities were significantly increased after adding Asp into the *** then,the cell proliferation effect induced by Asp was ameliorated by ***:The anti-liver cancer efficacy of LD extract was validated in H22 mice model,and inhibition of Asp level might be the underlying mechanism.

关键词： liver cancer Euphorbia fischeriana Steud. aspartic acid metabolomics

Effects of malignancies on fertility preservation outcomes and relevant cryobiological advances

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Science China(Life Sciences) 2020年第2期63卷 217-227页

作者： Dongming Liu Jie yan Jie qiao Reproductive Medical Center Department of Obstetrics and GynecologyPeking University Third HospitalBeijing 100191China National Clinical Center for Obstetrics and Gynecology Beijing 100191China Key Laboratory of Assisted Reproduction Ministry of EducationBeijing 100191China Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproduction Beijing 100191China

A decrease in cancer deaths has resulted in the possibility of child bearing for many young adult cancer survivors. Most antitumor treatment modalities are detrimental to female fertility, and methods for fertility preservation before gonadotoxic treatment, including cryopreservation of oocytes, embryos and ovarian tissue, have therefore been developed. This review focuses on the ovarian function of cancer patients, the safety and efficacy of fertility preservation methods, and the pregnancy outcomes of these patients. Breast cancer and hematological tumors constitute the majority of cancers in reproductive-aged female oncology patients. Ovarian function may not be impacted by breast cancer cells, while in patients with hematological malignancies, decreases in anti-Müllerian hormone and antral follicle counts have been demonstrated. In most cases, patients can undergo ovarian stimulation without delaying treatment, and a new stimulation protocol known as dual stimulation, which may be more efficient, has now been developed. Birth outcomes are also acceptable in cancer patients.

关键词： cancer patients fertility preservation controlled ovarian stimulation safety

Eulerian and Bipartite Binary Delta-matroids

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Acta Mathematicae Applicatae Sinica 2022年第4期38卷 813-821页

作者： qi yan Xian-an JIN School of Mathematics China University of Mining and TechnologyXuzhou 221116China School of Mathematical Sciences Xiamen UniversityXiamen 361005China

Delta-matroid theory is often thought of as a generalization of topological graph *** is well-known that an orientable embedded graph is bipartite if and only if its Petrie dual is *** this paper,we first introduce the concepts of Eulerian and bipartite delta-matroids and then extend the result from embedded graphs to arbitrary binary *** dual of any bipartite embedded graph is *** also extend the result from embedded graphs to the class of delta-matroids that arise as twists of binary *** related results are also obtained.

关键词： matroid delta-matroid binary bipartite Eulerian

Checkerboard Colourable Twuals

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Acta Mathematica Sinica,English Series 2022年第3期38卷 612-622页

作者： qi yan Xian An JIN School of Mathematics China University of Mining and TechnologyXuzhou221116P.R.China School of Mathematical Sciences Xiamen UniversityXiamen361005P.R.China

In this article we show that any embedded graph has a checkerboard colourable twual,which is equivalent to having a bipartite *** also obtain that any Eulerian embedded graph has a checkerboard colourable partial Petr... 详细信息

关键词： Embedded graphs twuals twisted dual partial duality petrie dual medial graphs direction checkerboard colourable

Change Rules of Γ_2 Particles in Hot-dipped Zn-Ti Coating

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Journal of Iron and Steel Research International 2014年第3期21卷 396-402页

作者： yan GUI qiao-yu XU yan-ling GUO Guangzhou Panyu Polytechnic South China University of Technology

Hot-dip Zn-Ti galvanizing can restrain the excess growth of the coating which has better corrosion resist- ances than hot-dip pure Zn. The change rules of Г2 intermetallic compound in hot-dip Zn-Ti galvanizing is investiga ted by immersion time, titanium content and the slag test using scanning electron microscopy （SEM）, energy dis- persive spectroscopy （EDS） and X-ray diffraction （XRD）. And the mechanism of nucleation and growth of Г2 inter- metallic compound is analysed. The results show that, when adding 0. 05mass% titanium to the zinc bath, the Г2 particles form in the η layer, which nucleate by obtaining Ti atoms from the phase and Fe atoms from the dissol- ving ζ phase layer. Moreover, the more titanium is added into the bath, the more and bigger Гz particles appear. The Fz particles in the coatings grow up noticeably with prolonging the immersion time.

关键词： hot-dip galvanizing Zn-Ti alloy bath Г2 phase particle