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Defence Technology（防务技术） 2022年第8期18卷 1362-1368页

作者： Zhou-yang Wu Jin-xu Liu Song Zhang Xian-qing Liu Xiao Xu Wei-zhe ma Shu-kui Li Chuan He School of materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Science and Technology on Transient Impact Laboratory No.208 Research Institute of China Ordnance Industries102202China Department of materials Science and Engineering Shenzhen MSU-BIT UniversityShenzhen518172China

A facile and economical approach was developed for the large-scale production of powdered core-shell structured PTFE/Al (CS-PA) energetic materials through ultrasonic-assisted mixing. The low-cost micrometer-sized PTFE and Al particles were used as starting materials. Under high-power ultrasonic waves, the PTFE powder was dispersed into nano-to sub-micrometer-sized particles and then encapsulated the Al microparticles to form the core-shell structure. The heat of combustion, burning rate, and pressurization rate of the powdered CS-PA were measured. The thermal-initiated reaction behavior was further evaluated using thermogravimetry-differential scanning calorimetry. Subsequently, the bulk CS-PA with a uniform microstructure was obtained via cold isostatic pressing of the powdered CS-PA followed by vacuum sintering. For the bulk CS-PA, the quasi-static compression behavior was characterized, and the impact-initiated reaction processes were conducted using the Split Hopkinson Pressure Bar (SHPB) and evaluated by a high-speed camera. Compared to physically mixed PTFE/Al materials, the powdered and bulk CS-PA demonstrated enhanced thermal- and impact-initiated reaction characteristics respectively, proving the effectiveness of our approach for constructing core-shell structures.

关键词： PTFE/Al Core-shell structure Energetic materials Ultrasonic-assisted mixing

Interacting system NGC 7805/6(Arp 112)and its tidal dwarf galaxy candidate

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Research in Astronomy and Astrophysics 2021年第2期21卷 149-156页

作者： zhen-Xing Fu Chandreyee Sengupta Ramya Sethuram Bikram Pradhan Mridweeka Singh Kuntal Misra TomCScott Yin-zhe ma Purple Mountain Observatory(CAS) Nanjing 210034China School of Astronomy and Space Sciences University of Science and Technology of ChinaHefei 230026China Indian Institute of Astrophysics KoramangalaBangalore 560034India Aryabhatta Research Institute of Observational Sciences Manora PeakNainital 263001India Korea Astronomy and Space Science Institute 776 Daedeokdae-roYuseong-guDaejeon 34055Republic of Korea Institute of Astrophysics and Space Sciences(IA) Rua das Estrelas4150-762 PortoPortugal School of Chemistry and Physics University of KwaZulu-NatalWestville CampusPrivate Bag X54001Durban4000South Africa NAOC-UKZN Computational Astrophysics Centre(NUCAC) University of KwaZulu-NatalDurban4000South Africa

We present results from our Giant Metrewave Radio Telescope(GMRT)HⅠ,Himalayan Chandra Telescope(HCT)Hα,1 m Sampurnanand Telescope(ST)and 1.3 m Devasthal Fast Optical Telescope(DFOT)deep optical observations of the NGC 7805/6(Arp 112)system to test KUG 2359+311’s tidal dwarf galaxy(TDG)candidacy and explore the properties of the interacting *** GMRT HⅠmap shows no HⅠdetection associated with KUG 2359+311,nor any HⅠtail or bridge-like structure connecting KUG 2359+311 to the NGC 7805/6 *** HCT Hαimage,on the other hand,displays strong detections in KUG 2359+311,with net SFR0.035±0.009 M_(⊙)yr^(-1).The Hαdata constrain the redshift of KUG 2359+311 to 0.00≤z≤0.043,compared to the redshift of NGC 7806 *** detected to date have all been HⅠrich,and displayed HⅠ,ionised gas and stellar tidal debris trails(bridges or tails)linking them to their parent ***,neither our HⅠdata nor our optical imaging,while three magnitudes deeper than SDSS,reveals a tidal trail connecting KUG 2359+311 to NGC 7805/*** of HⅠ,presence of an old stellar population,ongoing star formation and reasonably high SFR compared to normal dwarf galaxies suggest that KUG 2359+311 may not be an Arp 112 *** is most likely a case of a regular gas-rich dwarf galaxy undergoing a morphological transformation after having lost its entire gas content to an interaction with the Arp 112 *** and metallicity from future spectroscopic observations of KUG 2359+311 would help clarify the nature of this enigmatic structure.

关键词： galaxies dwarf-galaxies interactions-galaxies spiral-galaxies star formation-galaxies peculiar-radio lines galaxies

New Understanding on the Memory Effect of Crystallized iPP

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Chinese Journal of Polymer Science 2014年第9期32卷 1224-1233页

作者： Xiang-yang Li zhe ma Feng-mei Su Nan Tian You-xin Ji Jie Lu zhen Wang 李良彬 National Synchrotron Radiation Laboratory College of Nuclear Science and Technology University of Science and Technology of China Department of Mechanical Engineering Eindhoven University of Technology P.O. Box 513 5600MB Eindhoven The Netherlands Department of Polymer Science and Engineering CAS Key Lab of Soft Matter Chemistry University of Science and Technology of China

In this study, recovery processes of isotactic polypropylene （iPP） melted spherulites at 135 ℃ after melting at higher temperatures （170 ℃-176 ℃） were investigated with polarized optical microscopy and Fourier transform infrared spectroscopy. The recovery temperature was fixed to exclude the interference from heterogeneous nuclei. After melting at temperatures between 170 ℃ and 174 ℃, the melted spherulite could recover back to the origin spberulite at low temperatures. Interestingly, a distinct infrared spectrum from iPP melt and crystal was observed in the early stage of recovery process after melting at low temperatures, where only IR bands resulting from short helices with 12 monomers or less can be seen, which indicates that the presence of crystal residues is not the necessary condition for the polymer memory effect. Avrami analysis further indicated that crystallization mainly took place in melted lamellae. After melting at higher temperatures, melted spherulite cannot recover. Based on above findings, it is proposed that the memory effect can be mainly ascribed to melted lamellae, during which crystalline order is lost but conformational order still exists. These conformational ordered segments formed aggregates, which can play as nucleation precursors at low temperatures.

关键词： Memory effect Isotactic polypropylene Conformational ordering Topological connectivity Aggregate.

Data driven analysis reveals prognostic genes and immunological targets in human sepsis-associated acute kidney injury

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World Journal of Emergency Medicine 2024年第2期15卷 91-97页

作者： Qing Zhao Jinfu ma Jianguo Xiao zhe Feng Hui Liu Department of Diagnosis and Treatment of Cadres the First Medical CenterChinese PLA General HospitalBeijing 100853China Intensive Care Unit the 305th Hospital of Chinese PLABeijing 100032China Department of Critical Care Medicine the First Medical CenterChinese PLA General HospitalBeijing 100853China Nephrology Department the First Medical CenterChinese PLA General HospitalBeijing 100853China

BACKGROUND:The molecular mechanism of sepsis-associated acute kidney injury(SA-AKI)is *** analyzed co-differentially expressed genes(co-DEGs)to elucidate the underlying mechanism and intervention targets of ***:The microarray datasets GSE65682,GSE30718,and GSE174220 were downloaded from the Gene Expression Omnibus(GEO)*** identified the co-DEGs and constructed a gene co-expression network to screen the hub *** analyzed immune correlations and disease correlations and performed functional annotation of the hub *** also performed single-cell and microenvironment analyses and investigated the enrichment pathways and the main transcription ***,we conducted a correlation analysis to evaluate the role of the hub ***:Interleukin 32(IL32)was identified as the hub gene in SA-AKI,and the main enriched signaling pathways were associated with hemopoiesis,cellular response to cytokine stimulus,inflammatory response,and regulation of kidney ***,IL32 was significantly associated with mortality in SA-AKI ***,macrophages,T cells,and NK cells were closely related to IL32 and were involved in the immune microenvironment in SA-AKI ***32 expression increased significantly in the kidney of septic ***-like receptor 2(TLR2)was significantly and negatively correlated with ***:IL32 is the key gene involved in SA-AKI and is significantly associated with ***2 and relevant immune cells are closely related to key genes.

关键词： Sepsis Acute kidney injury Interleukin 32 Toll-like receptor 2 Bioinformatics analysis

膨润土碱性颗粒对Cu^(2+)、Zn^(2+)的吸附聚沉机理研究

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非金属矿 2024年第5期47卷 103-107页

作者：耿莘惠杨曦刘羡鱼马哲盖科函沈阳城市建设学院市政与环境工程学院辽宁沈阳110167

为了解决单一材料处理含重金属离子废水的局限性,采用膨润土和钢渣两者复合制备碱性颗粒,通过宏观与微观相结合的手段,探究膨润土碱性复合颗粒吸附剂对Cu、Zn的吸附聚沉机理。结果表明,复合颗粒对Cu^(2+)、Zn^(2+)的吸附符合多分子层吸... 详细信息

为了解决单一材料处理含重金属离子废水的局限性,采用膨润土和钢渣两者复合制备碱性颗粒,通过宏观与微观相结合的手段,探究膨润土碱性复合颗粒吸附剂对Cu、Zn的吸附聚沉机理。结果表明,复合颗粒对Cu^(2+)、Zn^(2+)的吸附符合多分子层吸附(BET)理论,动力学方程符合拟二级动力学方程,说明吸附过程同时伴随着物理吸附与化学吸附。通过对吸附后的碱性颗粒进行X射线衍射(XRD)、扫描电镜(SEM)表征,分析其形貌结构及矿物相的变化。结果表明,吸附Cu^(2+)、Zn^(2+)后,复合颗粒的层间距由1.549 nm分别增加到1.593 nm和1.643 nm,说明Cu^(2+)、Zn^(2+)进入了复合颗粒的层间,使层间距变大,发生离子交换作用。同时,复合颗粒中增加了新的矿物相,如Na_(2)CuSi_(3)O_(8)、Ca_(2)CuO_(3)、Cu_(5)(SiO_(3))_(4)(OH)_(2)、Zn_(4)Si_(2)O_(7)(OH)_(2)、Ca_(2)ZnSi_(2)O_(7)等,说明存在表面络合反应,碱性矿物相可以与Cu^(2+)、Zn^(2+)发生沉淀反应,实现对重金属离子的吸附-聚沉,是一种优良的吸附剂。

关键词：膨润土钢渣碱性颗粒 XRD SEM 吸附聚沉

Efficient Addition Polymerization of Norbornene with Polar Norbornene Derivatives by Neutral Nickel(Ⅱ) Catalysts

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Chinese Journal of Polymer Science 2019年第12期37卷 1215-1223,I0005页

作者： Ling Guo Yan-Ping Zhang Hong-Liang Mu Li Pan Kai-Ti Wang Huan Gao Bin Wang zhe ma Yue-Sheng Li Tianjin Key Lab of Composite&Functional materials School of Material Science and EngineeringTianjin UniversityTianjin UniversityTianjin 300350China Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun 130022China School of materials Science and Engineering Chongqing University of TechnologyChongqing 400054China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China

A series of nickel complexes{4 a:[(2,6-iPr2C6H3)N=CHC16H12O]Ni(Me)(Py),4b:[(2,6-iPr2C6H2OCH3)N=CHC16H12O]-Ni(Me)(Py),4 c:[(2,6-iPr2C6H2Cl)N=CHC16H12O]Ni(Me)(Py),and 4d:[(2,6-iPr2C6H2CF3)N=CHC16H12O]Ni(Me)(Py)}based onβ-ketiminato ligands bearing various electron-donating or electron-withdrawing substituents on the para-position of the aniline group were synthesized and unambiguously *** X-ray crystallographic analysis showed that complexes 4 b and 4 d adopted a nearsquare-planar geometry,and the anilines bearing a para-OMe or―CF3 group were found to situate on the axial position of the metal *** complexes exhibited high activities up to 1.25×10^7–1.35×10^7 g PNB·molNi^–1·h^–1 toward norbornene(NBE)addition polymerization(conversion>91.2%in 2 min)under low loading of B(C6F5)3(B/Ni=3)at 30°C,affording polymers with high molecular weight up to 2.54×10^6–3.18×10^*** levels of decrease in catalytic activities could be observed for all catalysts as the reaction temperature increased;4 d bearing a strong electron-withdrawing―CF3 group showed the highest activity at 70°C,while others exhibited notable decrease in catalytic activity with the raise in reaction *** 4 a–4 d showed remarkable tolerance to polar groups and could efficiently promote the copolymerization of NBE with its polar derivatives,including NBE bearing small acetate and hydroxyl group,as well as bulky oligomers,yielding copolymers with high functional NBE *** NBE copolymers with high functional comonomer incorporations and improved solubility were obtained in high yields.

关键词： Neutral nickel catalysts Norbornene Norbornene derivatives Vinyl-type polymerization

Prognostic value of PEA3 subfamily gene expression in cholangiocarcinoma

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World Journal of Gastrointestinal Oncology 2024年第9期16卷 4014-4027页

作者： Li Wang zhe Zhang Hai-Zhang ma Department of Emergency The Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina Department of Emergency Medicine The First People’s Hospital of Linping District HangzhouHangzhou 311100Zhejiang ProvinceChina Department of General Surgery Qilu Hospital of Shandong UniversityJinan 250000Shandong ProvinceChina

BACKGROUND Cholangiocarcinoma(CCA)is a lethal malignancy with limited treatment options and poor *** PEA3 subfamily of E26 transformation specific genes:ETV1,ETV4,and ETV5 are known to play significant roles in various cancers by influencing cell proliferation,invasion,and *** To analyze PEA3 subfamily gene expression levels in CCA and their correlation with clinical parameters to determine their prognostic value for *** The expression levels of PEA3 subfamily genes in pan-cancer and CCA data in the cancer genome atlas and genotype-tissue expression project databases were analyzed with R language *** curve and receiver operating characteristic analyses were performed using the SurvMiner,Survival,and Procr language *** gene expression profiling interactive analysis 2.0 database was used to analyze the expression levels of PEA3 subfamily genes in different subtypes and stages of *** Gestalt was used to perform the gene ontology/Kyoto encyclopedia of genes and genomes(GO/KEGG)analysis,and STRING database analysis was used to determine the genes and proteins related to PEA3 subfamily *** ETV1,ETV4,and ETV5 expression levels were significantly increased in *** were significant differences in ETV1,ETV4,and ETV5 expression levels among the different subtypes of CCA,and predictive analysis revealed that only high ETV1 and ETV4 expression levels were significantly associated with shorter overall survival in patients with ***/KEGG analysis revealed that PEA3 subfamily genes were closely related to transcriptional misregulation in *** vitro and in vivo experiments revealed that PEA3 silencing inhibited the invasion and metastasis of CCA *** The expression level of ETV4 may be a predictive biomarker of survival in patients with CCA.

关键词： PEA3 subfamily Cholangiocarcinoma The cancer genome atlas ETV4 The prognosis Prognostic biomarker

高压差大流量工况下套筒式减压阀的减压过程研究

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阀门 2024年第9期 1092-1096页

作者：田捍卫马哲辉钱锦远孔静娴金志江河南航天液压气动技术有限公司河南郑州451191 浙江大学化工机械研究所浙江杭州310027

随着工业技术的进步,许多行业面临高压差和大流量的工作条件,这对减压阀的设计提出了新的挑战。本文研究了一种套筒式减压阀在高压差大流量工况下的减压过程,通过数值模拟方法分析了不同开度与工况下套筒式减压阀内部的流场特性。研究发... 详细信息

随着工业技术的进步,许多行业面临高压差和大流量的工作条件,这对减压阀的设计提出了新的挑战。本文研究了一种套筒式减压阀在高压差大流量工况下的减压过程,通过数值模拟方法分析了不同开度与工况下套筒式减压阀内部的流场特性。研究发现,为了在保持氮气流量为2.5 kg/s的情况下实现从35 MPa至6 MPa的减压比,需要采用4级减压方案。此外,仿真结果还揭示了不同行程下套筒阀内部的压力和速度分布特征,特别是在节流孔处的压力急剧下降及流速增加的现象。本研究可为高压差大流量工况下套筒式减压阀的设计提供参考。

关键词：减压阀高压差大流量多级减压

Robust visual servoing based Chinese calligraphy on a humanoid robot

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High Technology Letters 2016年第1期22卷 30-37页

作者：马哲 Xiang zhenzhen Su Jianbo Department of Automation Shanghai Jiaotong University

A robust visual servoing system is investigated on a humanoid robot which grasps a brush in Chinese calligraphy *** system is implemented based on uncalibrated visual servoing controller utilizing Kalman-Bucy filter,with the help of an object detector by continuously adaptive MeanShift(CAMShift) *** this control scheme,a humanoid robot can satisfactorily grasp a brush without system *** proposed method is shown to be robust and effective through a Chinese calligraphy task on a NAO robot.

关键词： Chinese calligraphy robust visual servoing Kalman-Bucy filter continuously adaptive MeanShift (CAMShift) algorithm.

Single-cell RNA-seq reveals the transcriptional program underlying tumor progression and metastasis in neuroblastoma

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Frontiers of Medicine 2024年第4期18卷 690-707页

作者： zhe Nian Dan Wang Hao Wang Wenxu Liu zhenyi ma Jie Yan Yanna Cao Jie Li Qiang Zhao zhe Liu Department of Immunology School of Basic Medical SciencesTianjin Medical UniversityTianjin300070China zhejiang Key Laboratory of Medical Epigenetics Department of Cell BiologySchool of Basic Medical SciencesHangzhou Normal UniversityHangzhou311121China Department of Pediatric Oncology Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjin’s Clinical Research Center for CancerTianjin300060China Collaborative Innovation Center for Cancer Personalized Medicine Nanjing Medical UniversityNanjing211166China

Neuroblastoma(NB)is one of the most common childhood *** percent of patients present with widely disseminated clinical signs at diagnosis and exhibit poor ***,the molecular mechanisms triggering NB metastasis remain largely *** this study,we generated a transcriptomic atlas of 15447 NB cells from eight NB samples,including paired samples of primary tumors and bone marrow *** used time-resolved analysis to chart the evolutionary trajectory of NB cells from the primary tumor to the metastases in the same patient and identified a common‘starter’subpopulation that initiates tumor development and ***‘starter’population exhibited high expression levels of multiple cell cycle-related genes,indicating the important role of cell cycle upregulation in NB tumor *** addition,our evolutionary trajectory analysis demonstrated the involvement of partial epithelial-to-mesenchymal transition(p-EMT)along the metastatic route from the primary site to the bone *** study provides insights into the program driving NB metastasis and presents a signature of metastasis-initiating cells as an independent prognostic indicator and potential therapeutic target to inhibit the initiation of NB metastasis.

关键词： single-cell RNA sequencing metastasis neuroblastoma epithelial-to-mesenchymal transition