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Chinese Chemical Letters 2024年第8期35卷 567-571页

作者： Yijia Jiao Yuzhu Li Yuting Zhou Peipei Cen Yi ding Yan Guo xiangyu Liu State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021China College of Public Health College of Basic Medical ScienceNingxia Medical UniversityYinchuan 750021China

Concise chemistry leads to a family of heptanuclear Co^(Ⅱ)-clusters,[Co_(7)(N_(3))_(12)(CH_(3)CN)_(12)][Y_(2)(NO_(3))_(4)(piv)_(4)]·2CH_(3)CN(DC1)(pivH=pivalic acid),[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(0.4)(Cl)_(1.6)]·4CH_(3)CN(DC2)and[Co_(7)(N_(3))_(12)(CH_(3)CN)_(10)(NO_(3))_(2)]·4CH_(3)CN(DC3),in which the metal ions are exclusively bridged by end-on azido ligands to stabilize a beautiful disk-like *** resulting clusters exhibit interesting structural transformations and thermodynamically-distinct steady states verified by theoretical *** studies reveal the first observation of zero-field SMM behaviour in disk-like heptanuclear Co^(Ⅱ)complexes.

关键词： Multinuclear Co^(Ⅱ)-clusters Disk-like motif Structural modulation Ferromagnetic coupling Zero-field SMM

Fabrication and mechanical behavior of 2D-C_(f)/Ta_(x)Hf_(1−x)C–SiC composites by a low-temperature and highly-efficient route

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Journal of Advanced Ceramics 2023年第10期12卷 1961-1972页

作者： Xuegang Zou Dewei Ni Bowen Chen Feiyan Cai Le Gao Ping He Yusheng ding xiangyu Zhang Shaoming Dong State Key Laboratory of High-Performance Ceramics&Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Structural Ceramics and Composites Engineering Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhouChina

C_(f)/Ta_(x)Hf_(1−x)C–SiC composites are ideal thermal structural materials for service under extreme conditions of hypersonic ***,how to synthesize TaxHf1-xC powders and efficiently fabricate C_(f)/Ta_(x)Hf_(1−x)C–SiC composites still faces some ***,mechanical properties and thermophysical properties of Ta_(x)Hf_(1−x)C vary with the composition,but not ***-depth analysis of mechanical behaviors of the C_(f)/Ta_(x)Hf_(1−x)C–SiC composites is extremely important for their development and *** this study,the Ta_(x)Hf_(1−x)C powders(x=0.2,0.5,0.8)were successfully synthesized via solid solution of TaC and HfC at a relatively low temperature of 1800℃,with a small amount of Si as an ***,the efficient fabrication of 2D-C_(f)/Ta_(x)Hf_(1−x)C–SiC composites was achieved by slurry impregnation and lamination(SIL)combined with precursor infiltration and pyrolysis(PIP).In addition,the mechanical behavior of the composites was investigated *** is demonstrated that the composites present remarkable non-brittle fractures,including a large number of fiber pull out and interphase ***,the fracture failure involves a complex process of microcrack generation and propagation,matrix cracking,and layer ***,the interfacial bonding between the fibers and the matrix is enhanced as the Ta∶Hf ratio decreases from 4∶1 to 1∶*** a result,C_(f)/Ta_(0.2)Hf_(0.8)C–SiC composites exhibit exceptional flexural strength of 437±19 MPa,improved by 46%compared with C_(f)/Ta_(0.8)Hf_(0.2)C–SiC(299±19 MPa).This study provides a new perception of design and fabrication of ultra-high-temperature ceramic(UHTC)matrix composites with high performance.

关键词： mechanical properties microstructure fabrication 2D-C_(f)/Ta_(x)Hf_(1−x)C-SiC composites

C_(f)/(CrZrHfNbTa)C-SiC high-entropy ceramic matrix composites for potential multi-functional applications

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Journal of Materials Science & Technology 2024年第15期182卷 132-140页

作者： Yang Hu Dewei Ni Bowen Chen Feiyan Cai Xuegang Zou Fan Zhang Yusheng ding xiangyu Zhang Shaoming Dong State Key Laboratory of High-Performance Ceramics&Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Structural Ceramics and Composites Engineering Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhouChina

In this work,C_(f)/(CrZrHfNbTa)C-SiC high-entropy ceramic matrix composites with good load-bearing,elec-tromagnetic shielding and ablation resistance were designed and reported for the first *** compos-ites were fabricated by an efficient combined processing of slurry infiltration lamination(SIL)and precur-sor infiltration and pyrolysis(PIP).Density and porosity of the as-fabricated composites are 2.72 g/cm^(3) and 12.44 vol.%,respectively,and the flexural strength is 185±13 *** to the carbon fiber rein-forcement with high conductivity and strong reflection,and high-entropy(CrZrHfNbTa)C ceramic matrix with strong absorbability,the total Electromagnetic interference shielding efficiency(SET)of the compos-ites with a thickness of 3 mm are as high as 88.2 dB and 90 dB respectively in X-band and *** means that higher than 99.999999%electromagnetic shielding is achieved at 8-18 GHz,showing excel-lent electromagnetic shielding *** C_(f)/(CrZrHfNbTa)C-SiC composites also present excellent ablation resistance,with the linear and mass ablation rates of 0.9μm/s and 1.82 mg/s after ablation at the heat flux of 5 MW/m^(2) for 300 s(∼2450℃).This work opens a new insight for the synergistic de-sign of structural and functional integrated materials with load-bearing,electromagnetic shielding and ablation resistance,etc.

关键词： High-entropy ceramic matrix composites Mechanical property Electromagnetic shielding Ablation resistance

考虑动态故障特性的全数字化保护系统可靠性分析

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电气应用 2019年第10期38卷 51-59页

作者：王玉财邵李斌李超李志远吴一凡丁翔宇国网宁东供电公司

传统可靠性分析方法无法体现全数字化保护系统动态失效特性,针对该问题,提出采用动态故障树分析全数字化保护系统的可靠性。首先分析了基于并行冗余协议(Parallel Redundancy Protocal,PRP)和高可用无缝环(High-availability Seamless R... 详细信息

传统可靠性分析方法无法体现全数字化保护系统动态失效特性,针对该问题,提出采用动态故障树分析全数字化保护系统的可靠性。首先分析了基于并行冗余协议(Parallel Redundancy Protocal,PRP)和高可用无缝环(High-availability Seamless Ring,HSR)的全数字化保护系统的结构。在此基础上,建立了全数字化保护系统的动态故障树失效模型。然后利用马尔科夫层次迭代法对该模型进行了求解,避免了状态空间爆炸而导致的求解困难的问题。最后,对比了PRP保护系统和HSR保护系统的可靠性以及可靠性框图分析结果和动态故障树分析结果的差异,定量分析了热备用对系统元件可靠性的影响。研究结果为全数字化保护系统的建立提供了科学的依据。

关键词：全数字化保护系统动态故障树可靠性热备用

Self-Powered Room-Temperature Ethanol Sensor Based on Brush-Shaped Triboelectric Nanogenerator

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Research 2021年第1期2021卷 531-541页

作者： Jingwen Tian Fan Wang Yafei ding Rui Lei Yuxiang Shi Xinglin Tao Shuyao Li Ya Yang xiangyu Chen CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Highly sensitive ethanol sensors have been widely utilized in environmental protection,industrial monitoring,and drink-driving *** this work,a fully self-powered ethanol detector operating at room temperature has been developed based on a triboelectric nanogenerator(TENG).The gas-sensitive oxide semiconductor is selected as the sensory component for the ethanol detection,while the resistance change of the oxide semiconductor can well match the“linear”region of the load characteristic curve of ***,the output signal of TENG can directly reveal the concentration change of ethanol *** accelerator gearbox is applied to support the operation of the TENG,and the concentration change of ethanol gas can be visualized on the Liquid Crystal *** fully self-powered ethanol detector has excellent durability,low fabrication cost,and high selectivity of 5 ***,the ethanol detector based on TENG not only provides a different approach for the gas detection but also further demonstrates the application potential of TENG for various sensory devices.

关键词： generator ethanol durability

结缕草成坪综合因素研究 Ⅱ.赤霉素浸种和表土掺砂对结缕草种子出苗及坪苗质量影响

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上海农学院学报 1999年第3期17卷 161-166页

作者：胡雪华陆文初何亚丽杨祥玉丁国钧上海农学院植物科学系上海201101

通过赤霉素浸种和表土掺砂对结缕草成坪的影响试验表明，５ｍｇ／Ｌ赤霉素浸种２ｄ和３ｃｍ表土内每平方米掺砂１０ｋｇ能显著提高出苗数，但对坪苗质量影响不显著。

关键词：结缕草赤霉素掺砂草坪植物

Molecular confined synthesis of magnetic CoO_(x)/Co/C hybrid catalyst for photocatalytic water oxidation and CO_(2)reduction

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Chinese Chemical Letters 2023年第12期34卷 328-332页

作者： Rui Li Chenchen Zhang Kejia You Bonan Li Wei Bu xiangyu Meng Baochun Ma Yong ding State Key Laboratory of Applied Organic Chemistry Key Laboratory of Advanced Catalysis of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou730000China State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Henan Provincial Key Laboratory of Nanocomposites and Applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou450006China

Photosynthesis[6CO_(2)+12H_(2)O→(CH_(2)O)+6O_(2)+6H_(2)O]in nature contains a light reaction process for oxygen evolution and a dark reaction process for carbon dioxide(CO_(2))reduction to carbohydrates,which is of great significance for the survival of living ***,for simulating photosynthesis,it is desirable to design and fabricate a bifunctional catalyst for promoting photocatalytic water oxidation and CO_(2)reduction ***,a molecular confined synthesis strategy is reasonably proposed and applied,that is the bifunctional CoO_(x)/Co/C-T(T=700,800 and 900℃)photocatalysts prepared by the pyrolysis of molecular Co-EDTA under N_(2) and air atmosphere in *** the prepared photocatalysts,the CoOx/Co/C-800 shows the best photocatalytic water oxidation activity with an oxygen yield of 51.2%.In addition,for CO_(2)reduction reaction,the CO evolution rate of 12.6μmol/h and selectivity of 75%can be achieved over this *** improved photocatalytic activities are attributed to the rapid electron transfer between the photosensitizer and the catalyst,which is strongly supported by the current densityvoltage G-V,steady-state and time-resolved photoluminescence spectra(PL).Overall,this work provides a reference for the preparation and optimization of photocatalysts with the capacity for water oxidation and CO_(2)reduction reactions.

关键词： CoO_(x)/Co/C Water oxidation CO_(2)reduction Photocatalyst Photosensitizer

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银屑病对患者生活质量的影响

解放军医学院学报 2015年第1期36卷 71-74页

作者：郑艺周勇赵华徐兴华赵梓刚丁香玉李恒进解放军总医院皮肤科北京100853

目的研究银屑病对患者健康相关生活质量(health-related quality of life,HRQOL)的影响,以及银屑病严重程度与生活质量的关系。方法对本院2013年2月-2014年3月124例(进行期53例,稳定期71例)门诊银屑病患者进行调查,对银屑病患者的严重... 详细信息

目的研究银屑病对患者健康相关生活质量(health-related quality of life,HRQOL)的影响,以及银屑病严重程度与生活质量的关系。方法对本院2013年2月-2014年3月124例(进行期53例,稳定期71例)门诊银屑病患者进行调查,对银屑病患者的严重程度进行皮损面积和严重程度指数(psoriasis area and severity index,PASI)评估,采用皮肤病生活质量量表(dermatology life quality index,DLQI)和简明健康状况量表(generic 36-item short-form,SF-36)评估患者生活质量。结果银屑病患者PASI平均11.6±6.1,平均DLQI得分7.4±5.8,平均SF-36得分53.8±15.0;进行期患者PASI、DLQI得分显著高于稳定期患者(P<0.01),SF-36得分显著低于稳定期患者(P<0.01),表明进行期患者生活质量显著低于稳定期;银屑病患者DLQI得分与PASI呈显著正相关(r=0.645,P=0.000),SF-36得分与PASI呈负相关(r=-0.209,P=0.020),DLQI与SF-36无相关性(r=-0.114,P=0.208)。结论银屑病会降低患者生活质量;进行期患者生活质量显著低于稳定期患者;生活质量与疾病严重程度显著相关。

关键词：银屑病健康相关生活质量皮肤病生活质量量表简明健康状况量表

296例儿童患者脾多肽注射液应用合理性分析及药物利用研究

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中国医院用药评价与分析 2021年第3期21卷 358-361,365页

作者：安娜张古英贾晨虹丁翔宇刘艳辉李瑞宏梁玉丽河北省儿童医院药学部河北石家庄050031 河北省儿童医院血液科河北石家庄050031

目的:探讨脾多肽注射液在儿童患者中的应用合理性及药物利用研究。方法:随机抽取2018年6月至2019年5月某儿童医院296例使用脾多肽注射液患儿的病历资料,结合药品说明书、《处方管理办法》、《儿童临床使用免疫调节剂专家共识》以及患儿... 详细信息

目的:探讨脾多肽注射液在儿童患者中的应用合理性及药物利用研究。方法:随机抽取2018年6月至2019年5月某儿童医院296例使用脾多肽注射液患儿的病历资料,结合药品说明书、《处方管理办法》、《儿童临床使用免疫调节剂专家共识》以及患儿年龄、体重,建立儿童脾多肽注射液临床合理应用评分标准,包括适应证、药物剂量、溶剂种类、药物浓度、给药频次、联合用药和免疫功能检查等7项指标,对各项指标进行合理性评价,合理记1分,计算各指标合理率及总得分百分率,初步探讨脾多肽注射液在儿童患者中的合理用药评价方法。结果:用药评价结果显示,得分率由高至低依次为药物剂量(100%,296例)、溶剂种类(100%,296例)、给药频次(100%,296例)、适应证(97.97%,290例)、联合用药(95.61%,283例)、药物浓度(79.73%,236例)、免疫功能检查(61.82%,183例)。对患儿的体重进行分组分析,结果显示,单位体质量用药量与体重呈负相关。药物利用分析结果显示,儿童剂量药物利用指数(dose of children drug utilization index,d CDUI)随着体重的增加而降低,且低体重患儿的d CDUI>1,存在过度应用现象;高体重患儿的d CDUI1,超浓度应用现象严重。结论:应规范脾多肽注射液在儿童患者中的临床应用,促进合理用药。

关键词：脾多肽注射液儿童剂量儿童药物利用指数合理用药

Abnormal expression of inducible nitric oxide synthase in Duchenne muscular dystrophy muscles

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Chinese Science Bulletin 1998年第10期43卷 860-863页

作者： Minsheng Zhu Yuhua Fan xiangyu Xu Gang Wang Yue Shen Ying Pan Shubiao ding Nanjing Mil Inst Med Sci Nanjing 210002 Peoples R China Nanjing Children Hosp Dept Neurol Nanjing 210005 Peoples R China

Duchenne muscular dystrophy (DMD) is a fatal genetic disease for the youth and children. 8 biopsies of DMD patients were determined and demonstrated that the membrane_binding nitric oxide synthase was enriched in normal skeletal muscles and was little in DMD muscles. The results from Western blot and immunohistochemistry showed that inducible nitric oxide synthase (iNOS) was overexpressed in DMD muscle fibers, while a small amount of highly localized iNOS can be found in normal fibers. Based on these findings, it is proposed that the mechanism of progressive injury in DMD muscle might be associated with the abnormal expression of iNOS.

关键词： Duchenne muscular dystrophy inducible nitric oxide synthase human.