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A Novel Modified Tree-Seed Algorithm for High-Dimensional Optimization Problems

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Chinese Journal of Electronics 2020年第2期29卷 337-343页

作者： ZHAO Shijie GAO Leifu TU Jun YU Dongmei Institute of Optimization and Decision College of Science Liaoning Technical University Institute for Optimization and Decision Analytics Liaoning Technical University

To efficiently handle high-dimensional continuous optimization problems, a Modified tree-seed algorithm(MTSA) is proposed by coupling a newly introduced control parameter named as Seed domain shrinkable coefficient(SDSC) and Local reinforcement strategy(LRS) based on gradient information of adjacentgeneration best trees. SDSC is dynamically decreased with iterations to adjust the produced domain of offspring seeds,for achieving the tradeoff between the global exploration and local exploitation. LRS strategy is to execute local exploitation process by employing gradient information of two best trees, for enhancing convergence efficiency and local optima avoidance with probabilities. The compared experimental results show the different effects of differenttype SDSC on MTSA, the faster convergence efficiency and the stronger robustness of the proposed MTSA.

关键词： Tree-seed algorithm Seed domain shrinkage Local reinforcement High-dimension optimization

The stability of inorganic perovskite solar cells:from materials to devices

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Materials Futures 2023年第3期2卷 21-37页

作者： Bingcheng yu Shan Tan dongmei Li Qingbo Meng Beijing National Laboratory for Condensed Matter Physics Renewable Energy LaboratoryInstitute of PhysicsChinese Academy of Sciences(CAS)Beijing 100190People’s Republic of China Huairou Division Institute of PhysicsChinese Academy of SciencesBeijing 101407People’s Republic of China College of Materials Science and Opto-Electronic Technology University Chinese Academy of SciencesBeijing 100049People’s Republic of China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Songshan Lake Materials Laboratory DongguanGuangdong 523808People’s Republic of China

Inorganic halide perovskite solar cells(IHPSCs)have become one of the most promising research hotspots due to to the excellent light and thermal stabilities of inorganic halide perovskites(IHPs).Despite rapid progress in cell performance in very recent years,the phase instability of IHPs easily occurs,which will remarkably influence the cell efficiency and stability.Much effort has been devoted to solving this issue.In this review,we focus on representative progress in the stability from IHPs to IHPSCs,including(i)a brief introduction of inorganic perovskite materials and devices,(ii)some new additives and fabrication methods,(iii)thermal and light stabilities,(iv)tailoring phase stability,(v)optimization of the stability of inorganic perovskite solar cells and(vi)interfacial engineering for stability enhancement.Finally,perspectives will be given regarding future work on highly efficient and stable IHPSCs.This review aims to provide a thorough understanding of the key influential factors on the stability of materials to highly efficient and stable IHPSCs.

关键词： inorganic halide perovskites inorganic halide perovskite solar cells light stability thermal stability phase instability

Cubic multi-ions-doped Na_(2)TiO_(3) nanorod-like coatings:Structure-stable,highly efficient platform for ions-exchanged release to immunomodulatory promotion on vascularized bone apposition

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Bioactive Materials 2022年第12期7卷 72-90页

作者： dongmei yu Bo Li Meng yu Shuo Guo Zheng Guo Yong Han a State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an710049ShaanxiChina Department of Orthopaedics Tangdu HospitalFourth Military Medical UniversityXi’an710038ShaanxiChina

The dissolution-derived release of bioactive ions from ceramic coatings on metallic implants,despite improving osseointegration,renders a concern on the interfacial breakdown of the metal/coating/bone system during longterm service.Consequently,persistent efforts to seek alternative strategies instead of dissolution-derived activation are pressingly carrying out.Inspired by bone mineral containing ions as Ca2+,Mg2+,Sr2+and Zn2+,here we hydrothermally grew the quadruple ions co-doped Na2TiO3 nanorod-like coatings.The co-doped ions partially substitute Na+in Na2TiO3,and can be efficiently released from cubic lattice via exchange with Na+in fluid rather than dissolution,endowing the coatings superior long-term stability of structure and bond strength.Regulated by the coatings-conditioned extracellular ions,TLR4-NFκB signalling is enhanced to act primarily in macrophages(MΦs)at 6 h while CaSR-PI3K-Akt1 signalling is potentiated to act predominately since 24 h,triggering MΦs in a M1 response early and then in a M2 response to sequentially secrete diverse cytokines.Acting on endothelial and mesenchymal stem cells with the released ions and cytokines,the immunomodulatory coatings greatly promote Type-H(CD31hiEmcnhi)angiogenesis and osteogenesis in vitro and in vivo,providing new insights into orchestrating insoluble ceramics-coated implants for early vascularized osseointegration in combination with long-term fixation to bone.

关键词： Nanorod-like coating Ion doping Sodium titanate Immunomodulation Angiogenesis Osseointegration

Characteristics of root pullout resistance of Caragana korshinskii Kom.in the loess area of northeastern Qinghai-Tibet Plateau,China

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Journal of Arid Land 2022年第7期14卷 811-823页

作者： LIU Yabin SHI Chuan YU Dongmei WANG Shu PANG Jinghao ZHU Haili LI Guorong HU Xiasong Department of Geological Engineering Qinghai UniversityXining 810016China Key Laboratory of Genozoic Resource&Environment in North Margin of the Tibetan Plateau Xining 810016China Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes Xining 810008China

Roots exert pullout resistance under pullout force,allowing plants to resist uprooting.However,the pullout resistance characteristics of taproot-type shrub species of different ages remain unclear.In this study,in order to improve our knowledge of pullout resistance characteristics of taproot systems of shrub species,we selected the shrub species Caragana korshinskii Kom.in different growth periods as the research plant and conducted in situ root pullout test.The relationships among the maximum pullout resistance,peak root displacement,shrub growth period,and aboveground growth indices(plant height and plant crown breadth)were analyzed,as well as the mechanical process of uprooting.Pullout resistance of 4-15 year-old C.korshinskii ranged from 2.49(±0.25)to 14.71(±4.96)kN,and the peak displacement ranged from 11.77(±8.61)to 26.50(±16.09)cm.The maximum pullout resistance and the peak displacement of roots increased as a power function(R^(2)=0.9038)and a linear function(R^(2)=0.8242)with increasing age,respectively.The maximum pullout resistance and the peak displacement increased with increasing plant height;however,this relationship was not significant.The maximum pullout resistance increased exponentially(R^(2)=0.5522)as the crown breadth increased.There was no significant relationship between the peak displacement and crown breadth.The pullout resistance and displacement curve were divided into three stages:the initial nonlinear growth,linear growth,and nonlinear stages.Two modes of failure of a single root occurred when the roots were subjected to vertical loading forces:the synchronous breakage mode and the periderm preferential breakage mode.These findings provide a foundation for further investigation of the soil reinforcement and slope protection mechanisms of this shrub species in the loess area of northeastern Qinghai-Tibet Plateau,China.

关键词： loess area Qinghai-Tibet Plateau pullout resistance growth period aboveground growth indices pullout test Caragana korshinskii

Separation of hexane isomers by introducing“triangular-like and quadrilateral-like channels”in a bcu-type metal-organic framework

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Nano Research 2021年第2期14卷 526-531页

作者： dongmei Wang X inglong Dong yu Han yunling Liu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life SciencesInstitute of Physical and ChemistryZhejiang Normal UniversityJinhua 321004China Advanced Membranes and Porous Materials Center Physical Sciences and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal 23955-6900Kingdom of Saudi Arabia

The separation of hexane isomers is of vital importance to produce high quality gasoline in the petrochemical industry.However,the similar vapor pressure and boiling point of hexane isomers bring great difficulties and challenges in the separation process.Sieving effect,which allowing smaller molecules pass through and preventing others,should be a powerful strategy to solve this problem by making good use of porous materials.Therefore,physical separation by metal-organic framework(MOF)materials appears and becomes a burgeoning separation technique in industry.Due to the weak interaction between hexane isomers with absorbents,it puts forward higher requirements for the accurate design of MOF materials with optimal pore system.To address this issue,a novel MOF[Zn_(9)(tba)_(9)(dabco)_(3)]·12DMA-6MeOH(abbreviation:Zn_(9)(tba)_(9)(dabco)_(3);H_(2)tba=4-(1H-tetrazol-5-yl)-benzoic acid;dabco=1,4-diazabicyclo[2.2.2]octane;DMA=N,N-dimethylacetamide)with bcu network has been designed and synthesized by reticular chemistry strategy.Benefiting from the pre-designed topology and suitable linear ligand H_(2)tba and dabco,the structure of Zn_(9)(tba)_(9)(dabco)_(3)exhibits two types of channels with triangular-like and quadrilateral-like geometry.Zn_(9)(tba)_(9)(dabco)_(3)with appropriate channel size and shape displays potential selective adsorption capacity of vapor-phase hexane isomers through sieving effect.Moreover,outstanding gas adsorptive separation properties of Zn_(9)(tba)_(9)(dabco)_(3)could also be speculated by theoretical ideal adsorbed solution theory(IAST),suggesting Zn_(9)(tba)_(9)(dabco)_(3)can be regarded as a potential adsorbent material for purification natural gas_Breakthrough experiments show that Zn_(9)(tba)_(9)(dabco)_(3)is capable of discriminating all four hexane isomers at 298 K,and the corresponding research octane number(RON)of the eluted mixture closes to 95,which is higher than the standard for industrially refined hexane blends(about 83).We speculate that sieving effect and diffusion are a syne

关键词： bcu-type metal-organic framework channel characteristics sieving effect hexane isomers adsorptive separation

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师范生眼中的“好课”特征

高教发展与评估 2023年第6期39卷 76-88,I0006页

作者：于冬梅上海师范大学教育学院上海200241 江苏第二师范学院教育科学学院江苏南京210013

基于扎根理论的方法对105份师范生教育叙事文本进行编码,将师范生眼中的“好课”特征聚类为教学结构、学生学习、共同体交互、课堂文化、教师教导、教学成效6个一级节点,涵盖师生互动导学等19个二级节点。结果表明,师范生对课堂教学的... 详细信息

基于扎根理论的方法对105份师范生教育叙事文本进行编码,将师范生眼中的“好课”特征聚类为教学结构、学生学习、共同体交互、课堂文化、教师教导、教学成效6个一级节点,涵盖师生互动导学等19个二级节点。结果表明,师范生对课堂教学的认识呈多元化、综合化的良好态势,但亦存在重外显轻内隐、重师生轻生生、重认识轻建构的观察偏向。基于此,有必要以多模态数据帮助其理解“好课”真貌,以叙事教育法培养其践行“好课”信念。

关键词：师范生课程改革教育叙事课堂教学教师教育

Chemoproteomics identifies Ykt6 as the direct target of schisandrin A for neuroprotection

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Chinese Chemical Letters 2023年第6期34卷 401-405页

作者： Tiantian Wang yu Zhou Hao Zheng Tao Shen dongmei Wang Jinlan Zhang State Key Laboratory of Bioactive Substances and Functions of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

Schisandrin A is a natural dibenzocyclooctene lignan with potent neuroprotective activity.However,the specific mechanisms or direct target proteins have not been clarified up to now.In this study,we designed and synthesized the probes of schisandrin A with photoreactive diazirine and clickable alkyne to identify its direct target in SH-SY5Y cells by employing activity-based protein profiling(ABPP)technique.Ykt6 was prominent among the 13 proteins obtained with high confidence and we confirmed Ykt6 as the direct target of schisandrin A by CETSA,IF,SPR and knockdown assay.Functionally,schisandrin A protected the cells against the injury induced by glutamate by regulating autophagy via Ykt6.This discovery may provide a novel therapeutic option for various neuronal cell damage-mediated diseases.

关键词： Schisandrin A Activity-based protein profiling(ABPP) Neuroprotection Ykt6 Autophagy

MICROMECHANICAL MODELLING OF PHASE TRANSFORMATION BEHAVIOUR OF A TRANSITIONAL SOIL

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Acta Mechanica Solida Sinica 2014年第3期27卷 259-275页

作者： Chuang yu Zhenyu Yin dongmei Zhang College of Architecture and Civil Engineering Wenzhou University LUNAM University Ecole Centrale de Nantes UMR CNRS GeM Nantes France Department of Geotechnical Engineering College of Civil Engineering Tongji University

Experiments show that silts and silty soils exhibit contraction followed by dilation during shearing and the slope of failure line decreases at large strains, termed as phase transformation behaviour. This paper is to develop a new micromechanical stress-strain model that accounts for the phase transformation behaviour by explicitly employing the phase transformation line and its related friction angles. The overall strain includes plastic sliding and plastic compression among grains. The internal-friction angle at the phase transformation state and the void state variable are employed to describe the phase transformation behaviour. The model is examined by simulating undrained and drained triaxial compression tests performed on Pitea silts. The local stress-strain behaviour for contact planes is also investigated.

关键词： micromechanics silts constitutive models elastoplasticity anisotropy simulation

Protective mechanism of Coprinus comatus polysaccharide on acute alcoholic liver injury in mice,the metabolomics and gut microbiota investigation

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Food Science and Human Wellness 2024年第1期13卷 401-413页

作者： Jinyan yu Jianguang Sun Min Sun Weidong Li dongmei Qi Yongqing Zhang Chunchao Han School of Pharmacy Shandong University of Traditional Chinese MedicineJinan 250355China Hepatology Department of Affiliated Hospital of Shandong University of Traditional Chinese Medicine Jinan 250355China Experimental center Shandong University of Traditional Chinese MedicineJinan 250355China

Coprinus comatus polysaccharide(CCP)has significant hepatoprotective effect.To explore hepatoprotective mechanism of CCP,the study analyzed preventive effect of CCP on acute alcoholic liver injury in mice by histopathological examination and biochemical analysis.Simultaneously,hepatoprotective mechanism was also analyzed in conjunction with metabolomics and proliferation of gut microbiota.The results showed that CCP significantly decreased alanine aminotransferase(ALT),aspartate aminotransferase(AST)and triglyceride(TG)levels in serum of alcoholic liver disease(ALD)mice.Histopathological examination showed that CCP can significantly improve liver damage.Metabolomics results showed that there were significant differences in the level of metabolites in liver tissue of control group,ALD group and CCP group,including taurine,xanthosine,fumaric acid and arachidonic acid,among others.Metabolites pathways analysis showed that hepatoprotective effect of CCP was related to energy metabolism,biosynthesis of unsaturated fatty acids,amino acids metabolism and lipid metabolism.Additionally,CCP inhibited an increase in the number of Clostridium perfringens,Enterobacteriaceae and Enterococcus,and a decrease in the number of Lactobacillus and Bifidobacterium in the gut of ALD mice.All these findings suggested that CCP treatment reversed the phenotype of ethanol-induced liver injury and the associated metabolites pathways.

关键词： Coprinus comatus Polysaccharide Alcoholic liver disease Metabolomics Gut microbiota