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Rare Metals 2020年第10期39卷 1202-1209页

作者： Peng Jiang Luo-Bin Li Yan-Dong Yu wang-Ping Wu zhi-zhi wang Yi Zhang Nai-Ming Miao School of Mechanical Engineering Changzhou High Technology Research Key Laboratory of Mould Advanced ManufacturingChangzhou UniversityChangzhou 213164.China Jiangsu Key Laboratory of Green Process Equipment Changzhou UniversityChangzhou 213164.China School of Materials Science and Engineering Harbin University of Science and TechnologyHarbin 150040China

The effects of Sr and Y on microstructure,tensile property and free bulge formability of AZ31 alloy sheet produced by twin-roll casting and sequential hot rolling were investigated to improve the mechanical properties and formability of the AZ31 *** and Y addition can form Al4 Sr,Al2 Y and Al3 Y phases which can impede dislocation movement and promote dynamic recrystallization during the rolling deformation and decrease the lattice resistance to dislocation motion by decreasing Al solubility in the alloy,resulting in finer grains,lower dislocation density and no twinning generating in the twin-roll casting and sequential hot rolling(TRC-HR)AZ31-1.3 Sr-1.0 Y *** maximum stress and elongation of the alloy increase significantly after adding Sr and *** average cavity and grain sizes of the TRC-HR AZ31-1.3 Sr-1.0 Y alloy are smaller,resulting in higher elongation in the *** addition of Y and Sr can effectively improve the free bulge formability and the thickness uniform of the *** Al4 Sr,Al2 Y and A13 Y phases can inhibit the grain growth by obstructing dislocation motion or grain boundary slip,resulting in smaller grain size of AZ31-1.3 Sr-1.0 Y alloy bulge parts.

关键词： AZ31 alloy Strontium Yttrium Twin-roll casting Tensile properties Free bulge formability

Design of an L1 band low noise single-chip GPS receiver in 0.18 μm CMOS technology

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The Journal of China Universities of Posts and Telecommunications 2010年第3期17卷 60-65页

作者： CHEN Ying-mei LI zhi-qun wang zhi-gong JING Yong-kang ZHANG Li Institute of Radio Frequency and Electronic Integrated Circuits Southeast University Nanjing 210096 China

This article presents an L1 band low noise integrated global positioning system （GPS） receiver chip using 0.18 μm CMOS technology. Dual-conversion with a low-IF architecture was used for this GPS receiver. The receiver is composed of low noise amplifier （LNA）, down-conversion mixers, band pass filter, received signal strength indicator, variable gain amplifier, programmable gain amplifier, ADC, PLL frequency synthesizer and other key blocks. The receiver achieves a maximum gain of 105 dB and noise figure less than 6 dB. The variable gain amplifier （VGA） and programmable gain amplifier （PGA） provide gain control dynamic range over 50 dB. The receiver consumes less than 160 mW from a 1.8 V supply while occupying a 2.9 mm2 chip area including the ESD I/O pads.

关键词： CMOS RF receiver GPS low IF satellite communications wireless communications

The Influence of Different Single Radiation Dose on Delayed Growth of Transplanted Tumor in Athymic Mouse

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Clinical oncology and cancer researeh 2010年第5期7卷 303-309页

作者： zhi-zhen wang zhi-yong YUAN Ping wang Key Laboratory of Cancer Prevention and Therapy and Department of Radiation Therapy Tianjin Medical University Tianjin Cancer Institute & Hospital Tianjin 300060 China.

OBJECTIVE To reveal the biological effects and effective dosage in radiotherapy model which applies high single-dose irradiation by animal experiment. METHODS We inoculated subcutaneouly human pancreatic carcinoma cell line （MIA PaCa-2） in the lateral of the right lower extremity of the athymic mouse to grow transplantation tumor. While the median diameter of transplantation tumor reached 10 mm approximately, the animals were randomly divided into 7 groups （6 animals per group） and irradiation by different dose in one fixed with consciousness for fraction （0, 2, 5, 10, 17, 25, 35 Gy）. All were kept on to be bred for observation of the change in gross tumor volume, calculation of delayed growth time and delayed growth curve. RESULTS With increased dose per fraction, cutaneous reaction on the neoplasma surface of the animal, which was mainly moist yellow effusion was more and more severe. When dosage is less than 10 Gy, all animals showed similar effects, that＇s the delayed tumor growth was not obvious. Tumors receiving more than 10 Gy in one fraction showed very good biological effect and the delayed tumor growth was obviously related to dosage. The difference in delayed tumor growth between the 2 groups was statistically significant. The delayed tumor growth time in 10, 17, 25 Gy group was respectively 3 weeks, 6 weeks and more. CONCLUSION The biological effect of the model which applies high single-dose irradiation （more than 10 Gy in one fraction） was very good. The effect of delayed tumor growth was obviously related to the dosage after transplantation tumor was radiated. Because of its higher dose per fraction and biological effects, the model of high single-dose irradiation can get better clinical effects.

关键词： hypofactionation radiotherapy delayed growth curve MIA PaCa-2 oncosis transplanted tumor.

Genetic toxicity of taxol

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中国药理学与毒理学杂志 1996年第3期 14-18页

作者： MA Hua zhi, wang zhi Qiao, LIAO Ming Yang (Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850)

研究了抗肿瘤新药紫杉醇的致突变性及致癌潜能，结果表明，紫杉醇在１～５０００μｇ／皿范围内，无论有无Ｓ９活化系统对沙门氏菌株四株（ＴＡ９７，ＴＡ９８，ＴＡ１００，ＴＡ１０２）标准测试菌株均无致突变性．但在小鼠骨髓细胞微... 详细信息

研究了抗肿瘤新药紫杉醇的致突变性及致癌潜能，结果表明，紫杉醇在１～５０００μｇ／皿范围内，无论有无Ｓ９活化系统对沙门氏菌株四株（ＴＡ９７，ＴＡ９８，ＴＡ１００，ＴＡ１０２）标准测试菌株均无致突变性．但在小鼠骨髓细胞微核试验和ＣＨＬ细胞染色体畸变分析试验中，均显示了阳性反应．紫杉醇在２０，４０，８０ｍｇ·ｋｇ－１诱导的小鼠骨髓多染红细胞微核率分别为１９．３‰，２９．３‰，４７．１‰，均明显高于阴性对照的２．２‰（Ｐ＜０．０１）。染色体畸变分析表明，非活化条件下在２０～１６０μｇ·Ｌ－１范围内，活化条件下在８０～６４０μｇ·Ｌ－１范围内，紫杉醇可使ＣＨＬ细胞染色体畸变增加．畸变类型主要为染色体数目改变，表明其作用点是纺缍体而不是ＤＮＡ．本研究结果显示了紫杉醇的致癌潜能，也为其临床应用的风险效益评价提供了有价值的资料．关键词紫杉醇；沙门氏菌；微核；染色体畸变

关键词： taxol Salmonella micronuclei chromosome aberration

Overview of in-situ oxygen production technologies for lunar resources

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 233-255页

作者： Youpeng Xu Sheng Pang Liangwei Cong Guoyu Qian Dong wang Laishi Li Yusheng Wu zhi wang College of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China CAS Key Laboratory of Green Process and Engineering National Engineering Research Center for Green Recycling of Strategic Metal ResourcesInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

The rich resources and unique environment of the Moon make it an ideal location for human expansion and the utilization of extraterrestrial ***,crucial for supporting human life on the Moon,can be extracted from lunar regolith,which is highly rich in oxygen and contains polymetallic *** oxygen and metal extraction can be achieved using existing metallurgical ***,the ample reserves of water ice on the Moon offer another means for oxygen *** paper offers a detailed overview of the leading technologies for achieving oxygen production on the Moon,drawing from an analysis of lunar resources and environmental *** delves into the principles,processes,advantages,and drawbacks of water-ice electrolysis,two-step oxygen production from lunar regolith,and one-step oxygen production from lunar *** two-step methods involve hydrogen reduction,carbothermal reduction,and hydrometallurgy,while the one-step methods encompass fluorination/chlorination,high-temperature decomposition,molten salt electrolysis,and molten regolith electrolysis(MOE).Following a thorough comparison of raw materials,equipment,technology,and economic viability,MOE is identified as the most promising approach for future in-situ oxygen production on the *** the corrosion characteristics of molten lunar regolith at high temperatures,along with the Moon's low-gravity environment,the development of inexpensive and stable inert anodes and electrolysis devices that can easily collect oxygen is critical for promoting MOE technology on the *** review significantly contributes to our understanding of in-situ oxygen production technologies on the Moon and supports upcoming lunar exploration initiatives.

关键词： lunar resources in-situ oxygen production space metallurgy molten lunar regolith electrolysis

Programmed death ligand 1 is overexpressed by neutrophils in the blood of immunocompromised human immunodeficiency virus-negative patients with Pneumocystis jirovecii pneumonia

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Chinese Medical Journal 2019年第10期132卷 1237-1240页

作者： Nan-Nan Zhang Xu Huang Yi Zhang Jin-Gen Xia Min Li zhi-zhi wang Wei Cui Qing-Yuan Zhan Center for Respiratory Diseases China-Japan Friendship Hospital Beijing 100029 China Department of Pulmonary and Critical Care Medicine China-Japan Friendship Hospital Beijing 100029 China National Clinical Research Center for Respiratory Diseases Beijing 100029 China Graduate School of Peking Union Medical College Chinese Academy of Medical Sciences Beijing 100730 China Beijing Key Laboratory of Remodeling-Related Cardiovascular Diseases Beijing Anzhen Hospital of Capital Medical University Beijing Institute of Heart Lung and Blood Vessel Diseases Beijing 100029 China

Despite recent advances in antibiotic use, in creasing numbers of human immunodeficiency virus (HIV)- negative patients with Pneumocystis jirovecii pneumonia (PCP) are being admitted to intensive care units (ICUs), and show a mortality rate of over 50%.[1] A high neutrophil count in bronchoalveolar lavage (BAL) fluid is a predictor of poor prognosis in HIV-negative patients with PCP.

关键词： pneumonia neutrophils immunocompromised

Surface micro-arrays enhancing electromagnetic interference shielding of polydimethylsiloxane/multiwalled carbon nanotubes nanocomposites

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Nano Research 2025年第1期18卷 508-519页

作者： Ke Jiang zhi Chen Ji Yu Chen Zheng Shan Huang Ming wang Chongqing Key Laboratory of Soft-Matter Material Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China School of Mechanics Civil Engineering and ArchitecturesNorthwestern Polytechnical UniversityXi’an 710072China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China

Herein,the electromagnetic shielding performance of surface concave-convex(SC)and zig-zag micro-arrays was studied by using a simulation prediction and a three-dimensional(3D)printing custom ***,surface stripe concaveconvex(SSC)and surface cylindrical concave-convex(SCC)micro-arrays with or without zig-zag micro-arrays are designed,and their shielding performance is simulated in multi-bands(C-,X-band).The multiwalled carbon nanotubes/polydimethylsiloxane composites(MWCNT/PDMS)with different SC structures and different electrical conductivity are molded in acrylonitrile-butadiene-styrene copolymer(ABS)molds which are printed by a 3D *** results show that the electromagnetic interference shielding effectiveness(EMI SE)of the samples can be enhanced by constructing the SC micro-arrays with zig-zag micro-arrays,and improving with the increase of conductivity and *** addition,the shielding mechanism of the SC-MWCNT/PDMS composites is investigated and discussed by an electromagnetic simulation.

关键词： surface micro-arrays electrical properties electromagnetic interference(EMI)shielding three-dimensional(3D)printing

A low redox potential and long life organic anode material for sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 557-564页

作者： zhi Li Yang Wei Kang Zhou Xin Huang Xing Zhou Jie Xu Taoyi Kong Junwei Lucas Bao Xiaoli Dong Yonggang wang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Department of Chemistry Boston College School of Materials Science and Engineering Anhui University of Technology

Sodium-ion batteries （SIBs） with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C,H,O,and sodium ***,organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials（>1 V）.Organic electrodes with low redox potential that can be used as anode are ***,a novel organic anode material （tetrasodium 1,4,5,8-naphthalenetetracarboxylate,Na4TDC） has been developed with low redox potential （<0.7 V） and excellent cyclic *** three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations,showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022%per ***,the Na4TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg *** pairing with a thick Na3V2（PO4）3cathode (20.6 mg cm-2),the as-fabricated full cell exhibited high operating voltage （2.8 V）,excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles,well highlighting the Na4TDC anode material for SIBs.

关键词： Organic anode material Low redox potential Composite anode Sodium-ion batteries

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国有地勘单位人才水平评价分析

中国矿业 2016年第10期25卷 23-27页

作者：张志敏王志刚中国国土资源经济研究院北京101149

人才队伍作为地勘单位的核心竞争力,其发展水平将决定了地勘单位在市场竞争中的地位。为了进一步掌握全国局级国有地勘单位人才水平发展情况,服务国有地勘单位改革发展,本文在分析《全国地质勘查行业情况通报》相关数据的基础上,运用聚... 详细信息

人才队伍作为地勘单位的核心竞争力,其发展水平将决定了地勘单位在市场竞争中的地位。为了进一步掌握全国局级国有地勘单位人才水平发展情况,服务国有地勘单位改革发展,本文在分析《全国地质勘查行业情况通报》相关数据的基础上,运用聚类分析调整指标的相关性,构建了以地质勘查人员比例、技术人员、在职人员比例为基础指标的评价体系,使用极差法计算指标权重,首次对国有地勘单位2011-2014年人才水平进行综合评价,并对评价结果开展趋势分析及对比分析。地勘单位年龄结构老龄化现象严重、在职职工负担重、专业技术人员的匮乏,先进人才激励机制的缺少,导致地勘单位转型升级面临较大压力。

关键词：国有地勘单位人才水平指标体系聚类分析

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船舶柴油机轴系试验台的研制

内燃机工程 1985年第2期6卷 10-16页

作者：张天元王传溥徐伯清刘志刚王芝秋张志华哈尔滨船舶工程学院

本文介绍了船舶柴油机轴系试验台的总体结构和功能,并给出了部分试验结果。

关键词：电力测功器螺旋桨电力测功机船舶柴油机轴系试验台试验设备