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Mesoscale study on explosion-induced formation and thermochemical response of PTFE/Al granular jet

Defence Technology（防务技术） 2023年第5期23卷 112-125页

作者： Yuan-feng zheng zhi-jian zheng Guan-cheng Lu Hai-fu Wang Huan-guo Guo State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China

The dynamic formation,shock-induced inhomogeneous temperature rise and corresponding chemical reaction behaviors of PTFE/Al reactive liner shaped charge jet(RLSCJ)are investigated by the combination of mesoscale simulation,reaction kinetics and chemical energy release test.A two-dimensional granular model is developed with the randomly normal distribution of aluminum particle sizes and the particle delivery ***,the granular model is employed to study the shock-induced thermal behavior during the formation and extension processes of RLSCJ,as well as the temperature history curves of aluminum *** simulation results visualize the motion and temperature responses of the RLSCJ at the grain level,and further indicate that the aluminum particles are more likely to gather in the last two-thirds of the jet along its *** analysis shows that the shock,collision,friction and deformation behaviors are all responsible for the steep temperature rise of the reactive *** addition,a shock-induced chemical reaction extent model of RLSCJ is built based on the combination of the Arrhenius model and the Avrami-Erofeev kinetic model,by which the chemical reaction growth behavior during the formation and extension stages is described *** model indicates the reaction extent highly corresponds to the aluminum particle temperature history at the formation and extension *** last,a manometry chamber and the corresponding energy release model are used together to study the macroscopic chemical energy release characteristics of RLSCJ,by which the reaction extent model is verified.

关键词： Reactive materials Shaped charge Mesoscale simulation Formation Thermochemical response

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Anti-sense oligonucleotide labeled with technetium-99m using hydrazinonictinamide derivative and N-hydroxysuccinimidyl S-acetylmercaptoacetyltriglycline: A comparison of radiochemical behaviors and biological properties

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World Journal of Gastroenterology 2008年第14期14卷 2235-2240页

作者： Yun-Chun Li Tian-zhi Tan jian-Guo zheng Chun Zhang Department of Nuclear Medicine West China Hospital Sichuan University 37 Guoxue Alley Chengdu 610041 Sichuan Province China

AIM:To explore and compare the radiochemical behavior and biological property of anti-sense oligonuc-leotide (ASON) labeled with technetium-99m using N-hydroxysuccinimidyl S-acetylmercaptoacetyltriglycl ine (NHS-MAG3) and hydrazinonictinamide derivative (HYNIC). METHODS:After HYNIC and NHS-MAG3 were synthesized, ASON was labeled with technetium-99m using HYNIC and NHS-MAG3 as a bifunctional chelator. The in vivo and in vitro stability, binding rates of labeled compounds to serum albumen, biodistribution of 99mTc-MAG3-ASON and 99mTc-HYNIC-ASON in BALB/C mouse and its HT29 tumor cellular uptake were compared. RESULTS:The labeling efficiency and stability of 99mTc-MAG3-ASON were significantly higher than those of 99mTc-HYNIC-ASON (P = 0.02, and P = 0.03, respectively). 99mTc-MAG3-ASON had a significantly lower rate of binding to serum albumen than 99mTc-HYNIC-ASON (P 0.05) and significantly higher in lung and kidney (P < 0.05). The HT29 tumor cellular uptake rate of 99mTc-MAG3-ASON was significantly higher than that of 99mTc-HYNIC-ASON (P < 0.05). CONCLUSION:99mTc-MAG3-ASON shows superior radiochemical behaviors and biological properties than 99mTc-HYNIC-ASON. 99mTc-MAG3-ASON is a potential radiopharmaceutical agent for in vivo application.

关键词： Anti-sense oligonucleotide Radiolabeling Technetium-99m N-hydroxysuccinimidyl S-acetylmercapt oacetyltriglycline Hydrazinonictionamide derivative

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Carcinosarcoma of the deep lobe of the parotid gland in the parapharyngeal region:A case report

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World Journal of Clinical Cases 2023年第31期11卷 7663-7672页

作者： Yue-Yang Tang Gui-Quan Zhu zhi-jian zheng Li-Hong Yao Zi-Xin Wan Xin-Hua Liang Ya-Ling Tang Department of Oral Pathology West China Hospital of StomatologySichuan UniversityChengdu 610041Sichuan ProvinceChina State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases West China Hospital of StomatologySichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Oral and Maxillofacial Surgery West China Hospital of StomatologySichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Salivary carcinosarcoma is an extremely rare tumor containing both malignant epithelial and mesenchymal *** article reports a rare case of carcinosarcoma with salivary duct carcinoma and osteosarcoma as the tumor *** clinicopathological characteristics,treatment,and prognosis are discussed in conjunction with the *** SUMMARY A 48-year-old man presented with a complaint of a mass in the right parotid *** was first considered for assessment by fine-needle aspiration *** examination revealed a mass measuring approximately 4 cm×3.5 cm×3 *** mass,the whole lobe of the right parotid gland,and the right mandible were completely removed during *** histopathology confirmed carcinosarcoma of the salivary *** A definite diagnosis of salivary gland carcinosarcoma can only be obtained after complete surgical resection.

关键词： Salivary gland tumor Carcinosarcoma Clinicopathology Fluorescence in situ hybridization Case report

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Fabrication of HTS dc Bias Coil for 35 kV/90 MVA SFCL

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Journal of Electronic Science and Technology of China 2008年第2期6卷 97-100页

作者： Jing-Yin Zhang Wei-zhi Gong zheng-jian Cao Hui Hong Bo Tian Yang Wang jian-Zhong Wang Xiao-Ye Niu Ying Xin The authors are with Innopower Superconductor Cable Co. Ltd.Longsheng Industrial Park Beijing Economic ＆ Technological Develop-ment Area Beijing 100176 China

---For a saturated iron core fault current limiter, superconductor is the only suitable material to make the dc bias coil, especially when the device is used in a high voltage power grid. Commonly, superconducting wires are used to wind the dc bias coil Since the performance of the wires changes greatly under magnetic fields, the calculation of the field spatial distraction is essential to the optimization of the superconducting magnet. A superconducting coil with 141000 ampere-turns magnetizing capacity made of 17600 meters of BSCCO 2223 HTS tapes was fabricated. This coil was built for a 35 kV/90 MVA saturated iron-core fault current limiter. Computer simulations on magnetic field distribution were carried out to optimize the structural design, and experiments were done to verify the performance of the coil The configuration and the key parameters of the coil will be reported in this paper.

关键词： HTS coil superconducting fault current limiter superconducting magnets.

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An acupoint-originated human interstitial fluid circulatory network

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Chinese Medical Journal 2021年第19期134卷 2365-2369页

作者： Hong-Yi Li Fang Wang Min Chen zhi-jian zheng Ya-Jun Yin Jun Hu Hua Li Andreas Sammer Georg Feigl Norbert Maurer Chao Ma Fu-Sui Ji Department of Cardiology Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China Department of Radiology Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China Department of Accupuncture Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China Department of Engineering Mechanics Tsinghua UniversityBeijing 10084China Key Lab of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Key Lab of Intelligent Information Processing Institute of Computing Technology and University of Chinese Academy of SciencesBeijing 100190China Ordination Dr.Sammer Dr.med.univ.Andreas SammerGrazAustria Institute of Anatomy and Clinical Morphology University of Witten/HerdeckeWittenGermany University Clinic for Physical Medicine Rehabilitation and Occupational MedicineMedical University of ViennaViennaAustria Institute of Basic Medical Sciences Chinese Academy of Medical SciencesDepartment of Human AnatomyHistology and EmbryologySchool of Basic MedicinePeking Union Medical CollegeBeijing 100005China Chinese Institute for Brain Research Beijing 100005China

To the Editor:Since 1027,when the Tian Sheng Bronze Statue showing acupoints and meridians was first introduced for medical practitioners,it has evolved to the currently used acupoints and meridians atlas in traditional Chinese medicine(TCM).[1]To date,the acupoints represent defined areas on the body surface relative to certain *** acupoints in the extremity endings would connect anatomically with diverse associated visceral organs or tissues,forming a Meridian and Collateral *** on the atlas,each main meridian is usually a virtual line connecting a group of adjacent acupoints that correlate with certain visceral *** modern medical science,the anatomical structures of main meridians remain largely unclarified.

关键词： organs originated connecting

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SiC MOSFET短路保护电路研究

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电力电子技术 2017年第9期51卷 51-56页

作者：武晶晶郭希铮李志坚郑建朋北京交通大学电气工程学院北京100044

碳化硅(SiC)金属-氧化物半导体场效应晶体管(MOSFET)在高频、高压、大功率场合的研究和应用越来越多,能够提升变流器的效率和功率密度,而短路保护技术是SiC MOSFET驱动电路的关键,对变流器的安全可靠工作尤为重要。首先分析总结了SiC MO... 详细信息

碳化硅(SiC)金属-氧化物半导体场效应晶体管(MOSFET)在高频、高压、大功率场合的研究和应用越来越多,能够提升变流器的效率和功率密度,而短路保护技术是SiC MOSFET驱动电路的关键,对变流器的安全可靠工作尤为重要。首先分析总结了SiC MOSFET短路保护电路的特点,结果表明基于检测漏源极电压的短路保护方法更易于工程实现。在此基础上,针对两种漏源极电压保护电路方案,研究了其参数设计方法,分析了不同故障条件下的延迟时间,并进行实验验证。仿真与实验结果表明,漏源极电压检测方法能对SiC MOSFET进行有效保护,采用比较器和基准电压的漏源极电压保护电路更易于设计,在应用中可靠性和稳定性较高。

关键词：金属-氧化物半导体场效应晶体管碳化硅短路保护

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Dual-ligand chiral MOFs exhibiting circularly polarized room temperature phosphorescence for anti-counterfeiting

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Science China Chemistry 2025年

作者： Hongrui zheng Qingqing Wang Xinchao Wang Fei Wang Shangda Li jian Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Key Laboratory of Polymer Materials College of Chemistry and Materials Science Fujian Normal University

Advanced chiral optical materials exhibiting circularly polarized room-temperature phosphorescence（CPRTP） possess significant research value. This study facilitates the synthesis of chiral metal-organic frameworks（CMOFs） with good CPRTP performance by implementing a dual-ligand strategy. By self-assembling the luminescent ligand H2BIIM with the chiral ligands L-or D-H2IDPA in the presence of Zn（II） ions, two robust three-dimensional（3D） CMOFs were successfully constructed. These complexes demonstrated intense fluorescence and exhibited prolonged yellow room-temperature phosphorescence（RTP） with a duration of up to 6 s. Notably, they exhibited both circularly polarized fluorescence(glum= ±7.57 × 10-3) and CPRTP(glum=±2.68 × 10-3). These unique properties were effectively utilized in the creation of multi-color anti-counterfeiting patterns,underscoring their promising potential for a wide range of applications.

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Multiphysics simulation and optimization of the in-situ beneficiation process of ilmenite minerals from lunar regolith

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Science China Earth Sciences 2025年第1期68卷 195-207页

作者： Peng ZHANG Xin LIU Guanghui LIU Wei DAI Hanzhe YANG Haibo zheng zhi WANG Ran NIU Yifan BAI Yang ZHANG Chengbao LIU Ge YANG Junwei YANG Guang ZHANG Technology and Engineering Center for Space Utilization Chinese Academy of Sciences Beijing Hegong Simulation Co. Ltd

The exploration and utilization of lunar resources have become the major objectives of future lunar exploration missions. The classified collection and processing of lunar minerals is the basic prerequisite for the in-situ exploration and utilization of lunar resources. In this study, we propose a scheme for in-situ separation of magnetic minerals from lunar soils using the dry magnetic separation method. The scheme can realize the purpose of separating magnetic minerals from lunar regolith by altering the motion trajectory of lunar regolith particles with different magnetic properties. Detailed modeling of the dry magnetic separation device is conducted, and the three-dimensional distribution of magnetic parameters is calculated and analyzed. Based on the characterization and analysis of the Chang E-5's samples, the morphologies and physical parameters of lunar regolith particles are modeled and simulated. A discrete element simulation of the motion process of lunar regolith particles under multi-physical field conditions is performed, and the influences of key parameters on the beneficiation performance of lunar magnetic minerals are investigated. Our results indicate that optimal separation and beneficiation of lunar regolith particles can be achieved under specific conditions of magnetic field strength and drum speed. Additionally, we analyze the effects of lunar weak gravity conditions and the charged nature of lunar particles on the beneficiation process, showing that these factors can obviously enhance the beneficiation process of lunar ilmenites. This study demonstrates the feasibility of using the dry magnetic separation method for the beneficiation of magnetic minerals from lunar regolith, providing a theoretical basis for the scientific tasks of collecting, processing, and utilizing lunar mineral resources.

关键词： Lunar regolith In-situ resource utilization Magnetic separation Classified sampling

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DR-Ⅰ型干眼仪在临床的应用

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国际眼科杂志 2007年第2期7卷 534-535页

作者：宁晓玲郑志俭山西省眼科医院中国山西省太原市030002

目的:比较正常人与临床怀疑干眼症患者干眼仪泪膜图象及泪液分泌量的变化。方法:采用日本产DR-I型干眼仪对门诊干眼症患者245例490眼的泪膜脂质层光干涉图象形态进行观察,并与正常组50例100眼进行比较。干眼仪观察结果按5组级别统计,1、... 详细信息

目的:比较正常人与临床怀疑干眼症患者干眼仪泪膜图象及泪液分泌量的变化。方法:采用日本产DR-I型干眼仪对门诊干眼症患者245例490眼的泪膜脂质层光干涉图象形态进行观察,并与正常组50例100眼进行比较。干眼仪观察结果按5组级别统计,1、2级为正常,3、4、5级为异常,结果进行χ2检验。同时用Schirmer-I法观察患者组泪液分泌量。结果:正常组≤2级的人数百分率为84.1%,明显高于患者组58.2%;正常组≥3级的人数百分率为15.9%,明显低于患者组41.8%,两组比较差异有非常显著性意义(P<0.01)。Schirmer-I实验反应的是泪液的量,而泪膜光干涉图象反应的是泪液的质,两者之间部分有平行关系。结论:DR-I型干眼仪可以客观地反映患者泪膜性状的改变和程度及眼表疾病对泪膜的影响,结合干眼仪检查和Schirmer-I实验可为临床诊断提供参考依据。

关键词：干眼仪干眼症临床应用泪膜图象泪液分泌量

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氟替卡松治疗儿童哮喘96例

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中国新药与临床杂志 2004年第9期23卷 643-644页

作者：杨俭治郑敬阳陈志宏卓志强泉州市儿童医院哮喘防治中心福建泉州362000

目的 :观察氟替卡松吸入治疗儿童哮喘的效果。方法 :应用氟替卡松吸入治疗年龄 4～ 14a非急性发作期中、重度儿童哮喘共 96例 ,同时监测肺功能。结果 :总有效率达 99%。治疗前的肺功能第 1秒钟用力呼气容积 (FEV1)、呼气 5 0 %用力肺活... 详细信息

目的 :观察氟替卡松吸入治疗儿童哮喘的效果。方法 :应用氟替卡松吸入治疗年龄 4～ 14a非急性发作期中、重度儿童哮喘共 96例 ,同时监测肺功能。结果 :总有效率达 99%。治疗前的肺功能第 1秒钟用力呼气容积 (FEV1)、呼气 5 0 %用力肺活量时的流速 (FEF50 % )、呼气流量峰值 (PEF)分别为 (5 8±s 14 ) % ,(5 6± 12 ) % ,(5 7± 13) % ,而治疗 0 .5a后的肺功能指标分别为 (88± 13) % ,(88± 11) % ,(86± 14 ) % ,与治疗前相比 ,均有明显提高 ,差异有非常显著意义 (P <0 .0 1)。结论 :应用氟替卡松治疗儿童哮喘 ,疗效显著 ,安全性好。

关键词：哮喘儿童投药,吸入氟替卡松

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