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Influence of Interrupted Childhood Biographies on Health Development: Evaluation of the Scientific Literature on the Example of Being Taken into Care*
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作者 Manuela Loderer Ursula Gresser 《Journal of Biosciences and Medicines》 2024年第7期108-119,共12页
Background: An interrupted family history, as is the case after taking someone into care, can complicate collecting family anamnesis data. In addition, the interrupted family history itself could be considered part of... Background: An interrupted family history, as is the case after taking someone into care, can complicate collecting family anamnesis data. In addition, the interrupted family history itself could be considered part of a person’s risk profile. Aim and methods: Literature analysis was conducted to examine whether there are scientific studies on health development after placement in out-of-home-care in order to recognise any existing medical characteristics that may be relevant for internal medical care. Results: There are few scientific publications on the health development of people after being placed in out-of-home-care. Direct reactions to the stress of being taken into custody include nausea and fever. However, effects that go beyond the acute situation and last into adulthood have also been described, such as AD(H)D, asthma, diabetes, cancer, hypertension and cardiovascular diseases (myocardial infarction, stroke), epilepsy and increased overall mortality in adulthood. Studies show that not only previous experience but also the stress of being taken into care is triggers for this. Conclusion: Information about a previous institutionalisation can hence be important for internal medical practice. The available scientific literature shows heterogeneous study methodology and no group of people with experience of out-of-home-placement has yet been scientifically accompanied for a long time period. Further studies on this could help to better weigh up the consequences of omitting and conducting an intervention for child/youth protection as well as to improve the medical care for this group of people. 展开更多
关键词 Taking into Care Out-of-Home-Care interrupted Family History Physical Outcomes Internal Medicine
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Effect of interrupted aging on mechanical properties and corrosion resistance of 7A75 aluminum alloy
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作者 Xian-wen YANG Ling-ying YE +1 位作者 Yong ZHANG Quan-shi CHENG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第8期2415-2430,共16页
The effects of interrupted aging on mechanical properties and corrosion resistance of 7A75 aluminum alloy extruded bar were investigated through various analyses,including electrical conductivity,mechanical properties... The effects of interrupted aging on mechanical properties and corrosion resistance of 7A75 aluminum alloy extruded bar were investigated through various analyses,including electrical conductivity,mechanical properties,local corrosion properties,and slow strain rate tensile stress corrosion tests.Microstructure characterization techniques such as metallographic microscopy,scanning electron microscopy(SEM),and transmission electron microscopy(TEM)were also employed.The results indicate that the tensile strength of the alloy produced by T6I6 aging is similar to that produced by T6I4 aging,and it even exceeds 700 MPa.Furthermore,the yield strength increases by 52.7 MPa,reaching 654.8 MPa after T6I6 aging treatment.The maximum depths of intergranular corrosion(IGC)and exfoliation corrosion(EXCO)decrease from 116.3 and 468.5μm to 89.5 and 324.3μm,respectively.The stress corrosion factor also decreases from 2.1%to 1.6%.These findings suggest that the alloy treated with T6I6 aging exhibits both high strength and excellent stress corrosion cracking resistance.Similarly,when the alloy is treated with T6I4,T6I6 and T6I7 aging,the sizes of grain boundary precipitates(GBPs)are found to be 5.2,18.4,and 32.8 nm,respectively.The sizes of matrix precipitates are 4.8,5.7 and 15.7 nm,respectively.The atomic fractions of Zn in GBPs are 9.92 at.%,8.23 at.%and 6.87 at.%,respectively,while the atomic fractions of Mg are 12.66 at.%,8.43 at.%and 7.00 at.%,respectively.Additionally,the atomic fractions of Cu are 1.83 at.%,2.47 at.%and 3.41 at.%,respectively. 展开更多
关键词 7A75 aluminum alloy interrupted aging aging precipitation behavior mechanical properties intergranular corrosion exfoliation corrosion stress corrosion cracking
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Pulsatile gonadotropin-releasing hormone therapy induces spermatogenesis in pituitary stalk interruption syndrome:A case report and review of the literature
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作者 Jin-Long Xie Hai-Ying Zhu +5 位作者 Yang Dong Ping-Ping Sun Dan-Dan Qi Su-Xian Luan Yan Zhang Hua-Gang Ma 《World Journal of Clinical Cases》 SCIE 2024年第20期4348-4356,共9页
BACKGROUND Pituitary stalk interruption syndrome(PSIS)is a rare anatomical defect of the pituitary gland falling under the spectrum of holoprosencephaly phenotypes.It is characterized by a deficiency in anterior pitui... BACKGROUND Pituitary stalk interruption syndrome(PSIS)is a rare anatomical defect of the pituitary gland falling under the spectrum of holoprosencephaly phenotypes.It is characterized by a deficiency in anterior pituitary hormones,such as growth hormone,gonadotropins,and thyroid hormones.Due to the syndrome's rarity and nonspecific manifestations,there is a lack of standardized treatment strategies.Consequently,early diagnosis through imaging and on-time intervention are crucial for improving patients’outcomes.CASE SUMMARY A 30-year-old man presented with absent secondary sexual characteristics and azoospermia.Laboratory evaluation revealed a deficiency in gonadotropins,while thyroid function was mostly within normal ranges.Magnetic resonance imaging of the pituitary gland showed pituitary stalk agenesis,hypoplasia of the anterior pituitary,and ectopic posterior pituitary,leading to the diagnosis of PSIS.Initially,the patient underwent 6 mo of gonadotropin therapy without significant changes in hormone levels and secondary sexual characteristics.Pulsatile gonadotropin-releasing hormone therapy was then administered,resulting in the detection of sperm in the semen analysis within 3 mo.After 6 mo,routine semen tests showed normal semen quality.The couple faced challenges in conceiving due to abstinence and underwent three cycles of artificial insemination,which was unsuccessful.They also attempted in vitro fertilization,but unfortunately,the woman experienced a miscarriage 10 wk after the embryo transfer.CONCLUSION Early detection,accurate diagnosis,and timely treatment are crucial in improving the quality of life and fertility of PSIS patients. 展开更多
关键词 Pituitary stalk interruption syndrome Hypogonadotropic hypogonadism SPERMATOGENESIS Pulsatile gonadotropinreleasing hormone therapy Case report
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Pituitary stalk interruption syndrome complicated with liver cirrhosis:A case report
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作者 Min Chang Shi-Yu Wang +5 位作者 Zi-Yu Zhang Hong-Xiao Hao Xin-Gang Li Jing-Jing Li Yao Xie Ming-Hui Li 《World Journal of Hepatology》 2024年第11期1348-1355,共8页
BACKGROUND Pituitary stalk interruption syndrome(PSIS)is a rare disorder,often characterized by delayed growth and development,short stature,and hypogonadism as the main clinical manifestations.It is not clear whether... BACKGROUND Pituitary stalk interruption syndrome(PSIS)is a rare disorder,often characterized by delayed growth and development,short stature,and hypogonadism as the main clinical manifestations.It is not clear whether PSIS can lead to liver cirrhosis.CASE SUMMARY This paper reported a case of liver cirrhosis of unknown origin.The patient was admitted to Beijing Ditan Hospital Affiliated to Capital Medical University in November 2023.The diagnosis of PSIS complicated with liver cirrhosis was established after a series of blood tests and pituitary magnetic resonance imaging examination.CONCLUSION We also reviewed the literature from both domestic and international sources to deepen the clinical understanding of PSIS in conjunction with liver cirrhosis among medical practitioners. 展开更多
关键词 Pituitary stalk interruption syndrome Growth hormone Magnetic resonance imaging Liver cirrhosis
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Analyses of unified congestion measures for interrupted traffic flow on urban roads 被引量:1
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作者 任刚 范超 +2 位作者 华璟怡 黄正锋 吴建波 《Journal of Southeast University(English Edition)》 EI CAS 2014年第1期101-106,共6页
To study the congestion of interrupted flow on urban roads, a comprehensive evaluation method is proposed. First, based on the results of correlation analysis between different parameters of interrupted flow, the traf... To study the congestion of interrupted flow on urban roads, a comprehensive evaluation method is proposed. First, based on the results of correlation analysis between different parameters of interrupted flow, the traffic parameters of interrupted traffic flow are divided into two categories: the basic parameters and the operation parameters. Polynomial regression is used to formulize the nonlinear relationships between the basic parameters and the operation parameters. Then, the congestion model incorporating both operational and volume characteristics of traffic flow is proposed. The inputs of the model are the basic parameters, while the output is a dimensionless index value between 0 and 1. Finally, the proposed methods are compared with existing evaluation measures of congestion. Results show that the proposed indices can capture the variation of both the basic parameters and the operation parameters, which is more balanced compared with the existing evaluation measures. 展开更多
关键词 interrupted flow correlation analysis polynomial regression comprehensive congestion model
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Interrupt CW Approach for IF Video Signal Real Time Simulating and Its Validity
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作者 朱灿焰 龙腾 +1 位作者 何佩琨 毛二可 《Journal of Beijing Institute of Technology》 EI CAS 2000年第1期73-79,共7页
To determine the feasibility and practicability of interrupt continuous wave (CW) approach proposed for real time simulating radar intermediate frequency(IF) video signal, theoretical analysis and computer simulation... To determine the feasibility and practicability of interrupt continuous wave (CW) approach proposed for real time simulating radar intermediate frequency(IF) video signal, theoretical analysis and computer simulation were used. Phases at two linked points between the end and beginning of adjoined frames are always consistent; the bias Doppler frequency for the time delay of A/D sampling start responds to that for target acceleration. No digital phase compensation is required at continuous points, and the interrupt CW approach has apparently practical values. 展开更多
关键词 intermediate frequency(IF) video signal generating in low IF(LIF) domain interrupt continuous wave (CW) phase shift A/D sampling delay error
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久坐间断对成年人血管功能的急性影响与调节因素:荟萃分析
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作者 殷明越 刘骞 +4 位作者 许雄壮 马智英 邓盛基 邓鉴峰 黎涌明 《中国组织工程研究》 CAS 北大核心 2025年第17期3684-3696,共13页
目的:持续性地久坐行为会急性降低外周与中枢血管功能,进而加剧罹患心血管疾病风险。久坐间断可能是预防持续久坐对血管功能危害的潜在实用策略,但目前关于其急性功效的已有研究结论并不一致,也尚未得出具体的应用建议。文章旨在对久坐... 目的:持续性地久坐行为会急性降低外周与中枢血管功能,进而加剧罹患心血管疾病风险。久坐间断可能是预防持续久坐对血管功能危害的潜在实用策略,但目前关于其急性功效的已有研究结论并不一致,也尚未得出具体的应用建议。文章旨在对久坐间断对成人外周与中枢血管功能的急性影响进行荟萃分析,并探究其调节因素。方法:基于PRISMA报告规范,以“interrupting”“sedentary”与“vascular function”等为文献检索特征词,于2024年3月检索Web of Science核心合集、PubMed和中国知网数据库。纳入久坐间断对成人外周与中枢血管功能的急性影响的急性随机交叉试验文献。基于Cochrane开发的Risk of Bias 2评估偏倚风险,并基于GRADE系统评价证据等级。使用R语言(版本4.2.0)中的“meta”与“metafor”包进行主效应合并(Hedge’s g作为效应量指标)、发表偏倚检验、亚组与回归分析。结果:纳入22篇随机交叉试验,共364例受试者(年龄21-70岁)。相比于持续不间断久坐,久坐间断急性提升外周血管血流量(Hedge’s g=0.48,95%CI:0.14-0.82,P<0.01,I2=63%,低证据等级)、剪切应力(Hedge’s g=0.65,95%CI:0.37-0.93,P<0.01,I^(2)=54%,中等证据等级)与血流介导的血管舒张功能(Hedge’s g=0.43,95%CI:0.15-0.72,P<0.01,I2=61%,中等证据等级)。疾病(亚组间P=0.01)与性别(亚组间P=0.01)对血流量的主效应合并有显著调节作用(亚组间P=0.01),间断方式(亚组间P=0.01)与频率(亚组间P=0.02)对剪切应力的主效应合并有显著调节作用。久坐间断改善外周血管剪切应力受年龄(β=-0.02,95%CI:-0.03-0.01,P=0.09)与体质量指数(β=-0.10,95%CI:-0.18至-0.02,P<0.01)影响。久坐间断改善血流介导的血管舒张功能受总间断次数(β=-0.09,95%CI:-0.17至-0.01,P=0.03)与试验期间久坐控制时长影响(β=-0.21,-0.34至-0.09,P<0.01);每增加1 h久坐时长与久坐间断对血流介导的血管舒张功能的急性提升效果降低0.67%相关(P<0.01),当久坐控制时间>6 h时,久坐间断的急性收益消失。定性系统综述发现,久坐间断对各类人群血管脉搏波速度无显著影响,但可能预防老年人因持续久坐引起的中枢血管功能下降。结论:久坐间断急性提升成人外周血管血流量(低证据强度)、剪切应力(中证据强度)与血流介导的血管舒张功能(中证据强度),并可能预防、保护老年人因持续久坐引起的中枢血管功能下降(非常低证据等级)。受试者特征(疾病因素、性别、年龄与体质量指数)、间断干预方案(方式、频率、总间断次数)与久坐控制时长均会影响久坐间断对血管功能的急性改善效果。建议各类成人通过爬楼等大肌肉群参与的运动方式,以较高频率(如,每40 min进行1次)进行单次至少5 min的中低强度运动间断久坐,且每日持续久坐的累积时长不要超过6 h。 展开更多
关键词 久坐间断 久坐行为 碎片化运动 血流介导的血管舒张功能 血管功能 血流量 剪切应力 中枢血管功能 荟萃分析 Meta分析
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Using Interrupted Time Series Design to Analyze Changes in Hand, Foot, and Mouth Disease Incidence during the Declining Incidence Periods of 2008-2010 in China 被引量:25
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作者 YU Shi Cheng HAO Yuan Tao +5 位作者 ZHANG Jing XIAO Ge Xin LIU Zhuang ZHU Qi MA Jia Qi WANG Yu 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2012年第6期645-652,共8页
Objective To identify patterns of hand, foot and mouth disease (HFMD) incidence in China during declining incidence periods of 2008, 2009, and 2010. Methods Reported HFMD cases over a period of 25 months were extrac... Objective To identify patterns of hand, foot and mouth disease (HFMD) incidence in China during declining incidence periods of 2008, 2009, and 2010. Methods Reported HFMD cases over a period of 25 months were extracted from the National Disease Reporting System (NDRS) and analyzed. An interrupted time series (ITS) technique was used to detect changes in HFMD incidence rates in terms of level and slope between declining incidence periods of the three years. Results Over 3.58 million HFMD cases younger than 5 years were reported to the NDRS between May 1, 2008, and May 31, 2011. Males comprised 63.4% of the cases. ITS analyses demonstrated a significant increase in incidence rate level (P〈0.0001) when comparing the current period with the previous period. There were significant changes in declining slopes when comparing 2010 to 2009, and 2010 to 2008 (all P〈O.O05), but not 2009 to 2008. Conclusion Incremental changes in incidence rate level during the declining incidence periods of 2009 and 2010 can potentially be attributed to a few factors. The more steeply declining slope in 2010 compared with previous years could be ascribed to the implementation of more effective interventions and preventive strategies in 2010. Further investigation is required to examine this possibility. 展开更多
关键词 Hand foot and mouth disease EPIDEMIC Infectious disease Disease surveillance interrupted time series analysis
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MEASUREMENT OF ANODIC OVERVOLTAGE BY AMODIFIED CURRENT INTERRUPTION METHOD IN CRYOLITE-ALUMINA MELTS 被引量:7
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作者 Yang, Jianhong Lai, Yanqing +3 位作者 Xiao, Jin Li, Jie Liu, Yexiang Thonstad, J. 《中国有色金属学会会刊:英文版》 EI CSCD 1999年第1期123-129,共7页
1INTRODUCTIONIntheelectrolyticproductionofaluminium,thecelconsistsofacarbonanodeandanaluminiummetalcathode.... 1INTRODUCTIONIntheelectrolyticproductionofaluminium,thecelconsistsofacarbonanodeandanaluminiummetalcathode.Thedominantpotent... 展开更多
关键词 anodic OVERVOLTAGE CURRENT interruptION METHOD aluminium electrolysis
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ECCM scheme against interrupted sampling repeater jammer based on time-frequency analysis 被引量:31
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作者 Shixian Gong Xizhang Wei Xiang Li 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2014年第6期996-1003,共8页
The interrupted sampling repeater jamming(ISRJ) is an effective deception jamming method for coherent radar, especially for the wideband linear frequency modulation(LFM) radar. An electronic counter-countermeasure... The interrupted sampling repeater jamming(ISRJ) is an effective deception jamming method for coherent radar, especially for the wideband linear frequency modulation(LFM) radar. An electronic counter-countermeasure(ECCM) scheme is proposed to remove the ISRJ-based false targets from the pulse compression result of the de-chirping radar. Through the time-frequency(TF) analysis of the radar echo signal, it can be found that the TF characteristics of the ISRJ signal are discontinuous in the pulse duration because the ISRJ jammer needs short durations to receive the radar signal. Based on the discontinuous characteristics a particular band-pass filter can be generated by two alternative approaches to retain the true target signal and suppress the ISRJ signal. The simulation results prove the validity of the proposed ECCM scheme for the ISRJ. 展开更多
关键词 interrupted sampling repeater jamming(ISRJ) de-chirping radar time-frequency(TF) electronic counter-countermeasure(ECCM)
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A new car-following model with consideration of the traffic interruption probability 被引量:5
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作者 唐铁桥 黄海军 +1 位作者 黄仕进 姜锐 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第3期975-983,共9页
In this paper, we present a new car-following model by taking into account the effects of the traffic interruption probability on the car-following behaviour of the following vehicle. The stability condition of the mo... In this paper, we present a new car-following model by taking into account the effects of the traffic interruption probability on the car-following behaviour of the following vehicle. The stability condition of the model is obtained by using the linear stability theory. The modified Korteweg-de Vries (KdV) equation is constructed and solved, and three types of traffic flows in the headway sensitivity space-stable, metastable, and unstable--are classified. Both the analytical and simulation results show that the traffic interruption probability indeed has an influence on driving behaviour, and the consideration of traffic interruption probability in the car-following model could stabilize traffic flow. 展开更多
关键词 car-following model traffic interruption probability STABILITY
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A randomized controlled clinical trial: Interruption of intrauterine transmission of hepatitis B virus infection with HBIG 被引量:26
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作者 Qin XH Lin Xi-ao +2 位作者 Xiao-Bo Lu Yue-Xin Zhang Xia Cai 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第21期3434-3437,共4页
AIM: To evaluate the efficacy of interruption of intrauterine infection of HBV with HBIG in pregnant women with positive HBeAg and HBsAg.METHODS: A prospective randomized controlled trial was adopted. Sixty cases wi... AIM: To evaluate the efficacy of interruption of intrauterine infection of HBV with HBIG in pregnant women with positive HBeAg and HBsAg.METHODS: A prospective randomized controlled trial was adopted. Sixty cases with positive HBeAg and HBsAg were coincident with the criteria of inclusion, and 8 cases were excluded. Fifty-two cases were analyzed (28 cases in trial group and 24 in control group). All cases in trial group received 200 IU HBIG intravenously every 4 wk for 3 times from the 28^th wk. The cases of control group received placebo in the same way. All pregnant women were detected for HBeAg and HBV-DNA at the beginning of the trial and end of the trial (delivery). The cord blood of all newborns were collected for detecting HBeAg and HBV-DNA simultaneously.RESULTS: For investigation of HBeAg of newborns in trial group, 6 of 28 cases of newborns had positive HBeAg, the HBeAg positive rate being 21.4%, the total rate of 95% CI being 8%-41%. In control group, 19 of 24 cases of newborns had positive HBeAg, HBeAg positive rate was 79.2%, the rate of 95%CI being 5%-93%. By statistical analysis, 2= 17.26, P 〈 0.01, RR = 0.27, 95% CI (6.3 × 10^-6, 8.6 × 10^-5). For investigation of HBV-DNA of newborns in trial group, 7 of 28 cases of newborns had positive HBV-DNA, HBV-DNA positive rate being 25%, the total rate of 95% CI being 11%-45%. In control group, 20 of 24 cases of newborns had positive HBV-DNA, HBV-DNA positive rate was 83.3%, the total rate of 95% CI being 63%-95%. By statistical analysis, X^2 = 17.62, P 〈 0.01, RR = 0.30, 95% CI (1.5 × 10^-5, 1.7× 10^-4). The results indicated that there was significant difference in HBeAg positive rate and HBV-DNA positive rate of newborns between the two groups. In trial group, 7 of 28 newborns had HBV-DNA positive, but the HBV-DNA load of newborns was lower than that of their mothers. In control group, 20 of 24 newborns still had HBV-DNA positive, and the HBV-DNA load of newborns was close to those of their mothers. Statistical analysis indicated that there was no significant difference in HBV- DNA load between postnatal women without HBIG intervention and their filial generations (T = 81.5, P 〉 0.1). CONCLUSION: It is effective and safe to prevent intrauterine infection of HBV with HBIG from the 28^th wk in pregnant women with positive HBeAg and HBsAg. In clinical application, those pregnant women with negative HBeAg and positive HBV-DNA also need to be interrupted by HBIG. 展开更多
关键词 interruptION INTRAUTERINE TRANSMISSION Hepatitis B virus HBIG
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Abnormal interruption of water flow from an artesian well prior to 2008 Wenchuan earthquake 被引量:5
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作者 Liu Chenglong Che Yongtai +2 位作者 Xu Yinju Shi Zheming Yang Xianhe 《Geodesy and Geodynamics》 2011年第2期53-57,共5页
Water flow from an artesian well stopped on December 17, 2007 but recovered when the Wenchuan Ms 8.0 earthquake occurred on May 12, 2008. This well is located 90 km south of the epicenter in an extensional tectonic se... Water flow from an artesian well stopped on December 17, 2007 but recovered when the Wenchuan Ms 8.0 earthquake occurred on May 12, 2008. This well is located 90 km south of the epicenter in an extensional tectonic setting, where similar changes of water level and resistivity were observed at two other nearby sites. Our investigation suggests that this phenomenon was not caused by environmental disturbances, such as drought or borehole-drilling activity, but might be a precursor to the earthquake. 展开更多
关键词 interruption of well water precursory anomaly Wenchuan earthquake Qionglai well
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Knowledge, attitude and practice regarding nursing interruptions among Chinese nurses: A nationwide cross-sectional survey 被引量:8
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作者 Jianfei Xie Qian Sun +6 位作者 Siyuan Tang Siqing Ding Zhuqing Zhong Sainan Zeng Yinglong Duan Xiangyan Zhang Andy SK.Cheng 《International Journal of Nursing Sciences》 CSCD 2020年第1期66-73,共8页
Objectives:To explore the knowledge,attitude and practice of Chinese nurses regarding nursing interruptions and related factors.Methods:A total of 6,400 nurses from 31 hospitals in China were investigated by using the... Objectives:To explore the knowledge,attitude and practice of Chinese nurses regarding nursing interruptions and related factors.Methods:A total of 6,400 nurses from 31 hospitals in China were investigated by using the Knowledge,Attitude and Practice(KAP)Questionnaire of Nursing Interruptions.The questionnaire consists of three dimensions,knowledge,attitude and practice,containing 10,9 and 7 items,with full score of 50,45 and 28,respectively.Results:The mean overall KAP score regarding nursing interruptions of Chinese nurses was 74.05±16.65(range:26-123),with scores for the knowledge,attitude,and practice component being 21.74±9.80,34.83±6.98,and 17.49±4.97,respectively.Among the nurses,70.8%of them experienced an average level of KAP toward nursing interruptions while 15.5%were at a poor level.The knowledge,attitude,and practice of nursing interruptions were better in chief nurses,managers,nurses with a master degree or above,nurses ever received training,and nurses with a strong agreement to leadership compared to nurses in other groups(P<0.05).In addition,employment type,professional title,position,standardized training and leaders'attention were predictors of KAP in nurses.Conclusion:Chinese nurses have a moderate level of KAP regarding nursing interruptions.Leaders'attention,standardized training,position,professional title and employment type could predict nurses'KAP state of nursing interruptions.Thus,a targeted training program should be implemented for clinical nurses by nursing leaders,with a particular focus on feasibility and professionalism. 展开更多
关键词 ATTITUDE KNOWLEDGE NURSING NURSING interruptIONS PRACTICE Questionnaires
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Arc Behaviours in Vacuum Interrupters with Axial Magnetic Field Electrodes 被引量:3
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作者 王仲奕 郑跃胜 +1 位作者 刘志远 程少勇 《Plasma Science and Technology》 SCIE EI CAS CSCD 2008年第5期569-574,共6页
To improve the limiting current interruption capability and minimizing vacuum interrupter with axial magnetic field (AMF) electrodes, it is significant to investigate the vacuum arc behaviours between the contacts. ... To improve the limiting current interruption capability and minimizing vacuum interrupter with axial magnetic field (AMF) electrodes, it is significant to investigate the vacuum arc behaviours between the contacts. AMF distributions of the slot type electrodes were studied by both numerical analysis and experiments. Furthermore, the behaviours of vacuum arcs for different parameters of the slot type AMF electrodes were investigated by using high-speed CCD camera. The influences of gap distance, contact diameter and phase shift time between AMF and arc current on the vacuum arc were investigated. The results provide a reference for research and development of vacuum interrupters with slot type or other types of AMF electrode. 展开更多
关键词 vacuum interrupter vacuum arc axial magnetic field finite element
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Precipitation behavior of γ′ phase in superalloy FGH96 under interrupted cooling test 被引量:2
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作者 Heng-San Liu Lin Zhang +3 位作者 Xin-Bo He Xuan-Hui Qu Zhou Li Guo-Qing Zhang 《Rare Metals》 SCIE EI CAS CSCD 2013年第6期560-563,共4页
The precipitation behavior of γ′ phase,under various interrupt cooling tests after 1170℃,solution treatment was examined.The results indicate that the size of secondary γ′ precipitates increases with the decrease... The precipitation behavior of γ′ phase,under various interrupt cooling tests after 1170℃,solution treatment was examined.The results indicate that the size of secondary γ′ precipitates increases with the decrease of interrupt temperature,and the shape changes from spherical to butterfly like.The fine tertiary γ′ can form either during the post cool air quenching at high interrupt-temperatures,or during the specified 5℃ min-1cooling.Air quenching at high temperatures cannot suppress further nucleation of tertiary γ′ phase. 展开更多
关键词 Powder metallurgy Ni-base superalloy interrupt cooling PRECIPITATION
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Continuum modeling for two-lane traffic flow with consideration of the traffic interruption probability 被引量:2
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作者 田川 孙棣华 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第12期51-59,共9页
Considering the effects that the probability of traffic interruption and the friction between two lanes have on the car-following behaviour, this paper establishes a new two-lane microscopic car-following model. Based... Considering the effects that the probability of traffic interruption and the friction between two lanes have on the car-following behaviour, this paper establishes a new two-lane microscopic car-following model. Based on this microscopic model, a new macroscopic model was deduced by the relevance relation of microscopic and macroscopic scale parameters for the two-lane traffic flow. Terms related to lane change are added into the continuity equations and velocity dynamic equations to investigate the lane change rate. Numerical results verify that the proposed model can be efficiently used to reflect the effect of the probability of traffic interruption on the shock, rarefaction wave and lane change behaviour on two-lane freeways. The model has also been applied in reproducing some complex traffic phenomena caused by traffic accident interruption. 展开更多
关键词 two lanes traffic interruption probability traffic flow dynamics model numerical simulation
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Vacuum interrupter,high reliability component of distribution switches,circuit breakers and contactors 被引量:4
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作者 SLADE Paul G. MAYO Stephen +1 位作者 SMITH R.Kirkland TAYLOR Erik D. 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第3期335-342,共8页
The use of vacuum interrupters(VIs)as the current interruption component for switches,circuit breakers,reclosers and contactors operating at distribution voltages has escalated since their introduction in the mid-1950... The use of vacuum interrupters(VIs)as the current interruption component for switches,circuit breakers,reclosers and contactors operating at distribution voltages has escalated since their introduction in the mid-1950’s.This electrical product has developed a dominating position for switching and protecting distribution circuits.VIs are even being introduced into switching products operating at transmission voltages.Among the reasons for the VI’s popularity are its compactness,its range of application,its low cost,its superb electrical and mechanical life and its ease of application.Its major advantage is its well-established reliability.In this paper we show how this reliability has been achieved by design,by mechanical life testing and by electrical performance testing.We introduce the“sealed for life”concept for the VI’s integrity.We discuss this in terms of what is meant by a practical leak rate for VIs with a life of over 30 years.We show that a simple high voltage withstand test is an easy and effective method for monitoring the long-term vacuum integrity.Finally we evaluate the need for routine inspection of this electrical product when it is used in adverse ambient environments. 展开更多
关键词 Vacuum interrupter (VI) RELIABILITY Mechanical life Electrical life
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Algorithm Design of CPCI Backboard's Interrupts Management Based on VxWorks'Multi-Tasks 被引量:1
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作者 程敬原 安琪 杨俊峰 《Plasma Science and Technology》 SCIE EI CAS CSCD 2006年第5期614-617,共4页
This paper begins with a brief introduction of the embedded real-time operating system VxWorks and CompactPCI standard, then gives the programming interfaces of Peripheral Controller Interface (PCI) configuring, int... This paper begins with a brief introduction of the embedded real-time operating system VxWorks and CompactPCI standard, then gives the programming interfaces of Peripheral Controller Interface (PCI) configuring, interrupts handling and multi-tasks programming interface under VxWorks, and then emphasis is placed on the software frameworks of CPCI interrupt management based on multi-tasks. This method is sound in design and easy to adapt, ensures that all possible interrupts are handled in time, which makes it suitable for data acquisition systems with multi-channels, a high data rate, and hard real-time high energy physics. 展开更多
关键词 VXWORKS PCI multi-tasks backcard's interrupt handling
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Influence of Gap Distance on Vacuum Arc Characteristics of Cup Type AMF Electrode in Vacuum Interrupters 被引量:1
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作者 程少勇 修士新 +1 位作者 王季梅 申正超 《Plasma Science and Technology》 SCIE EI CAS CSCD 2006年第6期675-679,共5页
The greenhouse effect of SFe is a great concern today. The development of high voltage vacuum circuit breakers becomes more important. The vacuum circuit breaker has minimum pollution to the environment. The vacuum in... The greenhouse effect of SFe is a great concern today. The development of high voltage vacuum circuit breakers becomes more important. The vacuum circuit breaker has minimum pollution to the environment. The vacuum interrupter is the key part of a vacuum circuit breaker. The interrupting characteristics in vacuum and arc-controlling techniue are the main problems to be solved for a longer gap distance in developing high voltage vacuum interrupters. To understand the vacuum arc characteristics and provide effective technique to control vacuum arc in a long gap distance, the arc mode transition of a cup-type axial magnetic field electrode is observed by a high-speed charge coupled device (CGD) video camera under different gap distances while the arc voltage and arc current are recorded. The controlling ability of the axial magnetic field on vacuum arc obviously decreases when the gap distance is longer than 40 ram. The noise components and mean value of the arc voltage significantly increase. The effective method for controlling the vacuum arc characteristics is provided by long gap distances based on the test results. The test results can be used as a reference to develop high voltage and large capacity vacuum interrupters. 展开更多
关键词 vacuum interrupter vacuum arc arc mode gap distance arc voltage
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