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Oscillatory and Asymptotic Behavior of Solutions for Nonlinear Impulsive Delay Differential Equations

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Acta Mathematicae Applicatae Sinica 2006年第3期22卷 387-396页

作者： wei-hua mao An-hua Wan College of Science South China Agricultural University Guangzhou 510642 China Institute of Automation Chinese Academy of Sciences Beijing 100080 China

The oscillatory and asymptotic behavior of the solutions for third order nonlinear impulsive delay differential equations are investigated. Some novel criteria for all solutions to be oscillatory or be asymptotic are ... 详细信息

关键词： Impulse delay oscillation asymptotic property

On Generalized Vector Equilibrium Problems

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Acta Mathematicae Applicatae Sinica 2006年第1期22卷 21-26页

作者： An-hua Wan Jun-yi Fu wei-hua mao Department of Applied Mathematics South China Agricultural University Guangzhou 510642 China Department of Mathematics Nanchang University NaIlchang 330047 China

A new generalized vector equilibrium problem involving set-valued mappings and the proper quasi concavity of set-valued mappings in topological vector spaces are introduced; its existence theorems and the convexity of... 详细信息

关键词： Vector equilibrium problem set-valued mapping topological vector space KKM theorem

Determination of the genetic diversity of vegetable soybean [Glycine max(L.) Merr.] using EST-SSR markers

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第4期14卷 279-288页

作者： Gu-wen ZHANG Sheng-chun XU wei-hua mao Qi-zan HU Ya-ming GONG Institute of Vegetable Research Zhejiang Academy of Agricultural Sciences Center of Analysis and Measurement Zhejiang University

The development of expressed sequence tag-derived simple sequence repeats(EST-SSRs) provided a useful tool for investigating plant genetic *** the present study,22 polymorphic EST-SSRs from grain soybean were identified and used to assess the genetic diversity in 48 vegetable soybean *** the 22 EST-SSR loci,tri-nucleotides were the most abundant repeats,accounting for 50.00% of the total *** was the most common motif among tri-nucleotide repeats,with a frequency of 18.18%.Polymorphic analysis identified a total of 71 alleles,with an average of 3.23 per *** polymorphism information content(PIC) values ranged from 0.144 to 0.630,with a mean of *** heterozygosity(H o) values varied from 0.0196 to 1.0000,with an average of 0.6092,while the expected heterozygosity(H e) values ranged from 0.1502 to 0.6840,with a mean value of *** coordinate analysis and phylogenetic tree analysis indicated that the accessions could be assigned to different groups based to a large extent on their geographic distribution,and most accessions from China were clustered into the same *** results suggest that Chinese vegetable soybean accessions have a narrow genetic *** results of this study indicate that EST-SSRs from grain soybean have high transferability to vegetable soybean,and that these new markers would be helpful in taxonomy,molecular breeding,and comparative mapping studies of vegetable soybean in the future.

关键词： Expressed sequence tag(EST) Simple sequence repeat(SSR) Genetic diversity Microsatellites Vegetable soybean

Delayed-onset adenosine deaminase deficiency with a novel synonymous mutation and a case series from China

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World Journal of Pediatrics 2023年第7期19卷 687-700页

作者： Yue Zhang wei Liu Zhou Shu Yan Li Fei Sun Zhi-Gang Li Tong-Xin Han hua-wei mao Tian-You Wang Department of Immunology Beijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthNo.56 Nan Lishi RoadXicheng DistrictBeijing 100045China Hematology Oncology Center Henan Children's HospitalChildren's Hospital Affiliated of Zhengzhou UniversityZhengzhou Children's HospitalZhengzhouChina Hematologic Disease Laboratory Beijing Pediatric Research InstituteBeijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthBeijingChina Hematology Center Beijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthNo.56 Nan Lishi RoadXicheng DistrictBeijing 100045China Beijing Key Laboratory of Pediatric Hematology Oncology National Key Discipline of PediatricsCapital Medical UniversityBeijingChina Key Laboratory of Major Diseases in Children Ministry of EducationBeijingChina

Background Adenosine deaminase(ADA)is a key enzyme in the purine salvage *** defects of the ADA gene can cause a subtype of severe combined *** date,few Chinese cases have been *** We retrospectively reviewed the medical records of patients diagnosed with ADA deficiency in Beijing Children's Hospital and summarized the previously published ADA deficiency cases from China in the *** Nine patients were identified with two novel mutations(W272X and Q202=).Early-onset infection,thymic abnor-malities and failure to thrive were the most common manifestations of Chinese ADA-deficient *** ADA genotype has a major effect on the clinical ***,a novel synonymous mutation(c.606G>A,p.Q202=)was identified in a delayed-onset patient,which affected pre-mRNA splicing leading to a frameshift and premature truncation of the ***,the patient showed γδT cells expansion with an increased effect or phenotype,which may be associated with the delayed onset of *** addition,we reported cerebral aneurysm and intracranial artery stenosis for the first time in ADA *** patients died with a median age of four months,while two patients received stem cell transplantation and are *** This study described the first case series of Chinese ADA-deficient ***-onset infection,thymic abnormalities and failure to thrive were the most common manifestations in our *** identified a synonymous muta-tion that affected pre-mRNA splicing in the ADA gene,which had never been reported in ADA ***,we reported cerebral aneurysm in a delayed-onset patient for the first *** study is warranted to investigate the underlying mechanisms.

关键词： Adenosine deaminase deficiency Cerebral aneurysm Gamma delta Severe combined immunodeficiency Synonymous mutation

Developing new SSR markers from ESTs of pea(Pisum sativum L.)

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第9期11卷 702-707页

作者： Ya-ming GONG Sheng-chun XU wei-hua mao Qi-zan HU Gu-wen ZHANG Ju DING Ya-dan LI Institute of Vegetables Zhejiang Academy of Agricultural Science Hangzhou 310021 China Center of Analysis and Measurement Zhejiang University Hangzhou 310029 China

The development of expressed sequence tags(ESTs) from pea has provided a useful source for mining novel simple sequence repeat(SSR) *** the present research,in order to find EST-derived SSR markers,18 552 pea ESTs from the National Center for Biotechnology Information(NCBI) database were downloaded and assembled into 10 086 unigenes.A total of 586 microsatellites in 530 unigenes were identified,indicating that merely 5.25% of sequences contained *** most abundant SSRs within pea were tri-nucleotide repeat motifs,and among all the tri-nucleotide repeats,the motif GAA was the most abundant *** total,49 SSRs were used for primer ***-SSR loci were subsequently screened on 10 widely adapted varieties in *** these,nine loci showed polymorphic profiles that revealed two to three alleles per *** polymorphism information content value ranged from 0.18 to 0.58 with an average of ***,transferable analysis revealed that some of these loci showed transferability to faba *** of their polymorphism and transferability,these nine novel EST-SSRs will be valuable tools for marker-assisted breeding and comparative mapping of pea in the future.

关键词： Pea Expressed sequence tag(EST) Simple sequence repeat(SSR) Microsatellite

Enhancing the electrocatalytic performance of nitrate reduction to ammonia by in-situ nitrogen leaching

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Chinese Chemical Letters 2024年第2期35卷 564-569页

作者： Mimi Fu Yini mao hua Wang wei Luo Yimin Jiang wei Shen Ming Li Rongxing He College of Chemistry and Chemical Engineering Southwest UniversityChongqing 400715China

Electrochemical nitrate reduction reaction (NITRR) is regarded as a “two birds-one stone” method for the treatment of nitrate contaminant in polluted water and the synthesis of valuable ammonia, which is retarded by the lack of highly reactive and selective electrocatalysts .Herein, for the first time, nickel foam supported Co_(4) N was designed as a high-performance NITRR catalyst by an in-situ nonmetal leaching-induced *** the optimal potential, the Co_(4) N/NF catalyst achieves ultra-high Faraday efficiency and NH_(3) selectivity of 95.4% and 99.4%, *** situ X-ray absorption spectroscopy (XAS), together with other experiments powerfully reveal that the nitrogen vacancies produced by nitrogen leaching are stable and play a key role in boosting nitrate reduction to *** calculations confirm that Co_(4) N with abundant nitrogen vacancies can optimize the adsorption energies of NO_(3)^(-) and intermediates, lower the free energy (Δ G ) of the potential-determining step (*NH_(3) to NH_(3) ) and inhibit the formation of N-containing *** addition, we also conclude that the nitrogen vacancies can stabilize the adsorbed hydrogen, making H_(2) quite difficult to produce, and lowering ΔG from *NO to *NOH, which facilitates the selective reduction of *** study reveals significant insights about the in-situ nonmetal leaching to enhance the NITRR activity.

关键词： Co4N Nitrate reduction In-situ nonmetal leaching Nitrogen vacancy Mechanism

Metal-to-insulator transitions in 3d-band correlated oxides containing Fe compositions

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 48-59页

作者： Yiping Yu Yuchen Cui Jiangang He wei mao Jikun Chen Key Laboratory of Advanced Materials and Devices for Post-Moore Chips Ministry of EducationUniversity of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Institute of Industrial Science The University of Tokyo4-6-1 KomabaMeguro-kuTokyo 153-8505Japan

Metal-to-insulator transitions (MITs),which are achieved in 3d-band correlated transitional metal oxides,trigger abrupt variations in electrical,optical,and/or magnetic properties beyond those of conventional *** such material families,iron(Fe:3d^(6)4s^(2))-containing oxides pique interest owing to their widely tunable MIT properties,which are associated with the various valence states of *** potential electronic applications also show promise,given the large abundance of Fe on *** MIT properties triggered by critical temperature (TMIT) were reported for ReFe_(2)O_(4)(Fe^(2.5+)),ReBaFe_(2)O_(5)(Fe^(2.5+)),Fe_(3)O_(4)(Fe^(2.67+)),Re_(1/3)Sr_(2/3)FeO_(3)(Fe^(3.67+)),Re Cu_(3)Fe_(4)O_(12)(Fe^(3.75+)),and Ca_(1-x)Sr_(x)FeO_(3)(Fe^(4+))(where Re represents rare-earth elements).The common feature of MITs of these Fe-containing oxides is that they are usually accompanied by charge ordering transitions or disproportionation associated with the valence states of ***,we review the material family of Fe-containing MIT oxides,their MIT functionalities,and their respective *** the perspective of potentially correlated electronic applications,the tunability of the TMITand its resultant resistive change in Fe-containing oxides are summarized and further compared with those of other materials exhibiting MIT *** particular,we highlight the abrupt MIT and wide tunability of TMITof Fe-containing quadruple perovskites,such as Re ***,their effective material synthesis still needs to be further explored to cater to potential applications.

关键词： metal-to-insulator transitions Fe-containing oxides charge ordering charge disproportionation

High Speed Sintering:Assessing the Influence of Energy Input on Microstructure and Mechanical Properties of Polyether Block Amide(PEBA)Parts

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Chinese Journal of Polymer Science 2024年第5期42卷 675-682,I0004,I0010页

作者： Jiang-Tao Sun Zhi-Yong Fan Yi-wei mao wei Li wei Zhu Dao-Sheng Cai Qing-Song wei State Key Laboratory of Materials Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan430074China State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430074China National Engineering Research Centre for High Efficiency Grinding Hunan UniversityChangsha410082China Wuhan EasyMFG Technology CO. LTDWuhan430074China

High speed sintering,a new powder-bed fusion additive manufacturing technology,utilizes infrared lights(IR)to intensely heat and melt polymer *** presence of defects such as porosity,which is associated with particle coalescence,is highly dependdent on the level of energy *** study investigate the influcence of energy input on porosity and its subsequent effects on the mechanical properties and microstructures of PEBA *** parts were manufactured with a variety of lamp powers,resulting in a range of energy input levels spanning from low to ***,they underwent testing using Archimedes’method,followed by tensile *** porosity,mechanical characteristics,and energy input exhibit a strong correlation;inadequate energy input was the primary cause of pore *** the reduced IR light power resulted in the following outcomes:porosity,ultimate tensile strength,and elongation of 1.37%,7.6 MPa,and 194.2%,*** the energy input was further increased,the porosity was reduced to as low as 0.05%and the ultimate tensile strength and elongation were increased to their peak values of 233.8%and 9.1 MPa,respectively.

关键词： High speed sintering Additive manufacturing Energy input Powder bed fusion PEBA

Fault Analysis on AES:A Property-Based Verification Perspective

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Tsinghua Science and Technology 2024年第2期29卷 576-588页

作者： Xiaojie Dai Xingxin Wang Xue Qu Baolei mao wei Hu School of Cybersecurity Northwestern Polytechnical UniversityXi’an 710072China School of Cyber Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Fault analysis is a frequently used side-channel attack for ***,existing fault attack methods usually involve complex fault fusion analysis or computation-intensive statistical analysis of massive fault *** this work,we take a property-based formal verification approach to fault *** derive fine-grained formal models for automatic fault propagation and fusion,which establish a mathematical foundation for precise measurement and formal reasoning of fault *** extract the correlations in fault effects in order to create properties for fault *** further propose a method for key recovery,by formally checking when the extracted properties can be satisfied with partial keys as the search *** results using both unprotected and masked advanced encryption standard(AES)implementations show that our method has a key search complexity of 216,which only requires two correct and faulty ciphertext pairs to determine the secret key,and does not assume knowledge about fault location or pattern.

关键词： side-channel attack fault analysis fault propagation model property extraction fault verification