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Influence of Fe Addition on Phase Transformation,Microstructure and Mechanical Property of Equiatomic NiTi Shape Memory Alloy

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Acta Metallurgica Sinica(English Letters) 2017年第8期30卷 762-770页

作者： ya-nan Zhao Shu-Yong Jiang yan-Qiu zhang Yu-Long Liang College of Mechanical and Electrical Engineering Harbin Engineering University Harbin 150001 China College of Materials Science and Chemical Engineering Harbin Engineering University Harbin 150001 China

Based on equiatomic nickel and titanium, three kinds of NiTiFe alloys with a nominal chemical composition of Ni49Ti49Fe2, Ni48Ti48Fe4 and Ni47Ti47Fe6 （at.%）, respectively, have been designed to investigate the influence of the addition of Fe element on phase transformation, microstructure and mechanical property of equiatomic NiTi shape memory alloy. The microstructures of three kinds of NiTiFe alloys are characterized by the equiaxed grains instead of the dendrites. Consequently, some Ti2Ni precipitates are found to distribute in the grains interior and at the grain boundaries. The content of Fe element has an important influence on mechanical property of NiTiFe alloy. With increasing content of Fe element, the strength of NiTiFe alloy increases substantially, but the plasticity decreases sharply. It can be concluded that pre- cipitation strengthening and solution strengthening play a significant role in enhancing the strength of NiTiFe alloy. In the case of three NiTiFe alloys, neither martensitic transformation nor reverse transformation can be observed in the range from -150 to 150 ~C. On the one hand, the phase transformation temperature is probably out of the scope of the present experimental temperature. On the other hand, the addition of Fe element probably suppresses first-order martensitic transformation or reverse transformation, and consequently the second-order-like phase transformation from an incom- mensurate stage to a commensurate stage can probably take place.

关键词： Shape memory alloy Mechanical property Microstructure Phase transformation

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Comparison of updated birth weight,length and head circumference charts by gestational age in China with the INTERGROWTH-21 st NCSS charts:a population-based study

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World Journal of Pediatrics 2023年第1期19卷 96-105页

作者： ya-Qin zhang Hui Li Xin-nan Zong Hua-Hong Wu Department of Growth and Development Capital Institute of PediatricsNo.2Ya Bao RoadChaoyang DistrictBeijingChina

Background INTERGROWTH-21 st Newborn Cross-Sectional Study(NCSS)charts were established and recommended for global ***,whether one international reference is appropriate for all populations is still *** aim to compare the updated Chinese birth size charts by gestational age with INTERGROWTH-21st NCSS *** A cross-sectional survey was carried out,and the birth weight,length and head circumference of 24,375 infants born after uncomplicated pregnancies at gestational age ranging from 24+0 to 42+6 weeks were measured in 13 cities in China from 2015 to *** charts were *** measurements of all these infants were evaluated by the methods of calculating their Z scores using the INTERGROWTH-21 st *** prevalence of small for gestational age(SGA)and large for gestational age(LGA)based on birth weight was analyzed using Chinese charts and INTERGROWTH-21st *** The mean Z scores were 0.10 for birth weight,0.35 for length and-0.02 for head *** to the INTERGROWTH-21st charts,the Chinese birth weight percentile curves were higher except for the 90th percentile at 29-37 weeks gestational age,and the length percentile curves were higher after 33 weeks gestational age,while the 10th percentile of the head circumference was lower and the other percentiles were *** prevalence of SGA was 10.1%[95%confidence interval(CI)=9.7%-10.5%]using the Chinese birth weight chart and 6.5%(95%CI=6.2%-6.8%)using the INTERGROWTH-21 st birth weight *** prevalence of LGA was 9.9%(95%CI=9.5%-10.2%)and 8.2%(95%CI=7.9%-8.6%)using the Chinese and INTERGROWTH-21st birth weight charts,*** Chinese birth size charts based on infants born after uncomplicated pregnancies were different from the INTER-GROWTH-21st *** in the classification of newborns by the two charts should receive attention,and whether the application of INTERGROWTH-21st in Chinese newborns will lead to miscl

关键词： Birth length Birth weight Growth charts Head circumference Newborns

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我院358例血小板减少住院患者的临床特征分析

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中国医药导报 2017年第17期14卷 46-49页

作者：叶芳王玲孙剑笠王欢李宁宁舒亚南张立男童春清华大学附属北京市垂杨柳医院血液科北京100022

目的探讨清华大学附属北京市垂杨柳医院(以下简称"我院")住院患者血小板减少的科室分布及病因。方法从我院信息管理系统(HIS)中调取2015年8月~2016年7月住院的358例血小板减少成人患者的临床资料,对血小板减少程度、科室分布情况及病因... 详细信息

目的探讨清华大学附属北京市垂杨柳医院(以下简称"我院")住院患者血小板减少的科室分布及病因。方法从我院信息管理系统(HIS)中调取2015年8月~2016年7月住院的358例血小板减少成人患者的临床资料,对血小板减少程度、科室分布情况及病因进行回顾性分析。结果 358例患者中血小板计数≤20×109/L占5.86%;血小板计数>20×109~50×109/L的患者占16.76%;血小板计数>50×109~100×109/L的患者占77.38%。该358例患者主要分布在呼吸内科、普通外科、ICU、妇产科、神经内科、心内科、血液科等科室。43例患者明确诊断血液系统疾病引起血小板减少,315例患者因非血液系统疾病引起血小板减少,其中感染及药物影响为主要原因。结论我院2015~2016年度住院患者血小板减少的病因主要为非血液系统疾病引起,需重视药物及感染等对血小板的影响,但大多这类患者血小板减少程度较轻,通过积极控制原发原因可使血小板恢复。

关键词：血小板减少住院患者分布病因

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便携式静脉穿刺辅助设备在肿瘤化疗患者输液中的应用效果

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中国医药导报 2017年第22期14卷 165-168页

作者：胡玉洁李平叶苓王亚楠张曼莉安徽医科大学空军临床学院安徽合肥230032 解放军空军总医院门诊部北京100142

目的探讨自行研发的便携式静脉穿刺辅助设备在提高肿瘤化疗患者静脉穿刺成功率,减少化疗患者血管损伤,提高护士工作效率中的临床应用效果。方法收集2016年9月~2017年4月空军总医院肿瘤内科89例化疗患者作为研究对象,按照随机数字表法分... 详细信息

目的探讨自行研发的便携式静脉穿刺辅助设备在提高肿瘤化疗患者静脉穿刺成功率,减少化疗患者血管损伤,提高护士工作效率中的临床应用效果。方法收集2016年9月~2017年4月空军总医院肿瘤内科89例化疗患者作为研究对象,按照随机数字表法分为实验组(使用静脉穿刺辅助设备,45例)和对照组(常规穿刺,44例)。比较两组患者的一次性穿刺成功率、建立单个静脉通道的时间、药物外渗及静脉炎发生率情况。结果实验组患者一次性穿刺成功率明显高于对照组患者,差异有统计学意义(P<0.05);实验组护士建立单个静脉通路的时间明显少于对照组,差异有统计学意义(P<0.05);实验组患者药物外渗及静脉炎的发生率明显低于对照组,差异均有统计学意义(P<0.05)。结论便携式静脉穿刺辅助设备操作简单、实用性强,能够清晰显示化疗患者的血管走向,有助于提高护士的静脉穿刺成功率,减轻患者反复穿刺造成的血管损伤,对保护肿瘤化疗患者的静脉血管安全具有重要意义。

关键词：耐用医疗设备输注,静脉内化学疗法,辅助

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Double dehydrogenation of carbocyclic β-dicarbonyl compounds:Koser's reagent can do what iodine(V) reagents can

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Science China Chemistry 2019年第5期62卷 597-601页

作者： Shan-Shan Liu Li Wang ya-nan Duan Ao Yu Chi zhang State Key Laboratory of Elemento-Organic Chemistry Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)College of ChemistryNankai University Department of Chemical Engineering and Safety Binzhou University Central Laboratory College of ChemistryNankai University

Koser's reagent is found to be effective in the oxidative double dehydrogenation of various carbocyclic β-dicarbonyl compounds,which constitutes the first example on dehydrogenation reactivity of hypervalent iodine(Ⅲ) reagents for carbocyclic carbonyl compounds. DFT calculations reveal that the rate-determining step is the electrophilic addition of PhI+OH onto enolate of monodehydrogenated product.

关键词： Koser’s reagent double dehydrogenation hypervalent twisting 2,3-benzotropone DFT calculations

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Changes of feeding patterns in Chinese city children under 2 years from 1985 to 2015: results from a series of national cross-sectional surveys

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World Journal of Pediatrics 2019年第2期15卷 176-181页

作者： Hua-Hong Wu ya-Qin zhang Xin-nan Zong Hui Li Department of Growth and Development Capital Institute of PediatricsYaBao RoadChaoYang DistrictBeijing 100020China

Background In China,as the social transformation and economic development from 1985 to 2015,children's feeding pattern has undergone some *** we aimed to analyze the secular trend on feeding patterns of city children in *** All data were from a series of national survey which implemented once every 10 years in China from 1985 to *** use same indexes to evaluate the feeding pattern of children in these four *** From 1985 to 2005,the exclusive breastfeeding rates in infants under 6 months of age decreased,especially in suburban areas decreased by 17.7%;the continuous breastfeeding rate of 1-year-old children in suburban area decreased from 60.1 to 27.6%.However,from 2005 to 2015,the exclusive breastfeeding rates under 6 months of age increased by 16.0% in urban areas and 5.9% in suburban areas;the continuous breastfeeding rate of 1-year-old children in urban increased from 17.0 to 36.0%.The overall feeding rate of complementary food in infants under 6 months of age declined from 1985 to 2015;the average age at introduction of all complementary foods was around 6 months of age in *** There is an obvious trend on feeding pattern of Chinese *** 1985 to 2005,the breastfeeding rate decreased,the duration time of breastfeeding was shortened and the age at introduction of complementary food was *** 2005 to 2015,the breastfeeding rate increased,the duration time of breastfeeding was prolonged,and the age at introduction of complementary food was postponed.

关键词： Breastfeeding Complementary feeding Infant and young children Secular change

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Estimating biological reference points for Largehead hairtail(Trichiurus lepturus) fishery in the Yellow Sea and Bohai Sea

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Acta Oceanologica Sinica 2019年第10期38卷 20-26页

作者： Yupeng Ji Qun Liu Baochao Liao Qingqing zhang ya’nan Han Fisheries College Ocean University of ChinaQingdao 266003China Department of Mathematics Shandong UniversityWeihai 264209China

It is important to find a reliable method to estimate maximum sustainable yield(MSY)or total allowable catch(TAC)for fishery management,especially when the data availability is limited which is a case in China.A recently developed method(CMSY)is a data-poor method,which requires only catch data,resilience and exploitation history at the first and final years of the catch *** was used in this study to estimate the biological reference points for Largehead hairtail(Trichiurus lepturus,Temminck and Schlegel)in the Yellow Sea and Bohai Sea,based on the fishery data from China Fishery Statistical Year Books during 1986 to ***,Bayesian state-space Schaefer surplus production model(BSM)and the classical surplus production models(Schaefer and Fox)performed by software CEDA and ASPIC,were also projected in this study to compare with the performance of *** estimated MSYs from all models are about 19.7×104–27.0×104 t,while CMSY and BSM yielded more reasonable population parameter estimates(the intrinsic population growth rate and the carrying capacity).The biological reference points of B/BMSY smaller than 1.0,while F/FMSY higher than 1.0 revealed an over-exploitation of the fishery,indicating that more conservative management strategies are required for Largehead hairtail fishery.

关键词： CMSY surplus production models maximum sustainable yield Yellow Sea and Bohai Sea Trichiuruslepturus

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Effect of family caregiver nursing education on patients with rheumatoid arthritis and its impact factors:A randomized controlled trial

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World Journal of Clinical Cases 2021年第28期9卷 8413-8424页

作者： Jing Li Ying zhang ya-Juan Kang nan Ma Department of Immunology and Rheumatology The Third Hospital of Hebei Medical UniversityShijiazhuang 050051Hebei ProvinceChina

BACKGROUND Rheumatoid arthritis(RA)is a common autoimmune *** education for family caregivers is considered a workable and effective intervention,but the validity of this intervention in RA has not been *** To explore whether family caregiver nursing education(FCNE)works on patients with RA and the factors that influence *** In this randomized controlled study,a sample of 158 pairs was included in the study with 80 in the intervention group and 78 in the control *** data of patients and caregivers was *** FCNE intervention was admi-nistered to caregivers,and inflammation level indicators,disease activity indicators and mood disorder indicators of patients were followed up and *** Baseline characteristics of the intervention and the control groups had no significant *** were significantly reduced in the intervention group compared to the control *** intervention group showed significant differences in stratification of relationship,education duration and *** The effect of FCNE on RA is multifaceted,weakening inflammation level,alleviating disease activity and relieving mood *** between caregiver and patient,caregiver’s education level and patient’s age may act as impact factors of FCNE.

关键词： Nursing education Family nursing Rheumatoid arthritis Family caregivers Depression Anxiety

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Effects of Long-Term Groundwater Management and Straw Application on Aggregation of Paddy Soils in Subtropical China

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Pedosphere 2015年第3期25卷 386-391页

作者： YIN Li-Chu zhang Lei YI ya-nan LUO Lan-Fang College of Resources and Environment Hunan Agricultural University

Soil organic carbon （SOC） and iron （Fe）-oxides are important contributors of aggregate stability in highly weathered soils, and they are influenced by groundwater management and straw application. A 30-year plot experiment with early rice （Oryza sativa L.）-late rice-winter fallow rotations was conducted using a upland clay soil in cement pools under shallow groundwater table at a depth of 20 am （SGT） aud deep groundwater table at a depth of 80 cm （DGT） to simulate the groundwater tables of two types of important paddy soils, gleyed paddy soils and hydromorphic paddy soils, respectively, in subtropical China. Soil redox potential （Eh） was measured in situ, and 0-20 cm soil samples were collected for the analyses of soil Fe-oxides, SOC, and aggregates under SGT or DGT with different straw application treatments, in order to evaluate the interaction of groundwater management and straw application on paddy soil aggregation and the relative importance of SOC or Fe-oxides on soil aggregation. The results showed that soil Eh was restricted by irrigation, and its variation was more significant under DGT than under SGT. The decreased soil Eh or reduced drying and wetting cycles under SGT resulted in more SOC accumulation with the straw application, had no effect on soil free Fe-oxides （Fed）, significantly increased the amorphous Fe-oxide （Feo） and complex Fe-oxide contents, but decreased the crystalline Fe-oxide content （Fed-Feo）. The soils under DGT had more macroaggregates than those under SGT, but the difference decreased with the straw application. It could be concluded that soil Fe-oxides were the principal contributing factor to the aggregation of paddy soils in subtropical China and SOC was also an important contributing factor.

关键词： groundwater table Fe-oxides long-term experiment rice soil organic carbon

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Income inequality and growth from functional orientation and spatial policy:Case study of Tibet,China

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Journal of Mountain Science 2021年第1期18卷 178-193页

作者： ZHAO yan-nan FAN Jie WANG ya-fei LIANG Bo zhang Lu Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesChaoyang DistrictBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Beijing Technology and Business University School of International Economics and ManagementBeijing 100048China

Economic inequality and poverty are *** attention has been paid to these issues in recent *** on economic inequality have been characterized by geographical disparities and a lack of consideration of functional *** one of the most typical and featured mountainous areas in Western China,Tibet demonstrates both the necessity and urgency of conducting studies on income inequality and growth *** paper proposes to address these problems by exploring the temporal and geographical variations in income inequality in Tibet,thereby revealing the differences in functional *** Markov chains and panel regression analysis were applied to identify the spatial-temporal dynamics of income *** results of this study show that(1)the overall income inequality in Tibet shows an expanding trend in the period 2005–2010 and a converging trend in the period 2010–2015,and there is a large disparity in income inequality between functional zones;(2)Tibetan farmers and herdsmen may face great difficulties in achieving substantial growth in the near future;(3)frontier counties,cultivated land,and grassland areas have negative impacts on income growth,while cordyceps counties,GDP per capita,agricultural product proportion,transfer payments,the ratio of nonagricultural employment to the total employment,the length of the average schooling year,and the slaughter rate of cattle and sheep have positive impacts;and(4)functional orientation has made great differences to income inequality and its *** light of these results,evidence-based policies have been formulated to boost average household income and narrow income inequality in Tibet.

关键词： Income inequality Markov chains Mechanism Functionalorientation Transfer payment Tibet China

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