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Search Results: 1 - 10 of 366627 matches for " 张建晓 "
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时间尺度上一类二阶非线性动力系统的振动性判据

- , 2018, DOI: 10.3785/j.issn.1008-9497.2018.02.002
Abstract: 研究了时间尺度T上一类二阶非线性中立型变时滞泛函动力系统的振动性,通过引入2个不同的Riccati变换,借助时间尺度上的微积分理论,并结合不等式技巧,得到了该系统振动的2个新的准则,推广、改进和丰富了现有文献中的结果.
Abstract:We investigate oscillation of certain second-order nonlinear neutral variable delay functional dynamic equations on a time scale T. By using two Riccati substitutions, the time scales theory and inequality technique, we establish two new oscillation criteria for the equations. These results deal with some cases which are not covered by the existing results in the literature.
二阶Emden-Fowler型变时滞中立型微分方程的振荡性

- , 2018, DOI: 10.3785/j.issn.1008-9497.2018.03.007
Abstract: 利用广义双黎卡提变换技术及一些分析技巧,研究了一类二阶Emden-Fowler型非线性中立型变时滞泛函微分方程的振荡性,获得了该类方程振荡的2个新的判别准则,推广并改进了现有文献中的一些结果.
Abstract:The oscillatory behavior of a class of second-order Emden-Fowler-type nonlinear neutral variable delay functional differential equations is studied in this article. Using a couple generalized Riccati transformation and some necessary analytic techniques, we establish two new oscillation criteria for the equations, which improve and generalize some corresponding known results.
辅助决策应用程序中央决策栅格数据的动态报表
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计算机系统应用 , 2001,
Abstract: 本文主要结合实际工程应用,给出了Delphi开发决策支持应用程序中决策栅格控件TDecisionGrid动态报表的解决方案,并结合解决方案,说明了实现中应该注意的事项。
带血管蒂腓骨移植治疗复杂性严重胫骨粉碎性骨折及骨缺损
Complicated Severe Comminuted Tibia Fracture and Bone Defects Repaired by Fibula Transplantation with Vascular (FTV)
 [PDF]

傅晨, , 杨成勇,, 陆长美, , 王金光
Asian Case Reports in Surgery (ACRS) , 2012, DOI: 10.12677/ACRS.2012.12003
Abstract:

目的:探索带血管蒂腓骨移植治疗复杂性严重胫骨粉碎性骨折及骨缺损的可行性和疗效。方法:采用取同侧带血管蒂腓骨转位移植或取对侧带血管蒂腓骨游离移植方式修复胫骨粉碎性骨折及骨缺损共48例,均一期手术处理。结果:本组经2~3年随访,优35例,良10例,中2例,差1例。结论:处理复杂性严重胫骨粉碎性骨折及骨缺损,应高度重视一期腓骨移植的重要性。带血管蒂腓骨移植一期修复胫骨骨缺损具有可行性,但其骨愈合时间普遍较长。
Objective: To explore the availability and curative effect of the reconstruction through Fibula Transplanta- tion with Vascular (FTV) in the cases of complicated severe comminuted tibia fracture and bone defects. Methods: 48 cases of complicated severe comminuted tibia fracture and bone defects were repaired by homopleural FTV transplanta- tion and contralateral free FTV transplantation. All cases were treated by primary operations. Results: The follow-up ranged from 2 to 3 years. Excellent results were obtained in 35 cases, good in 10, fair in 2, and poor in 1 case. Conclu- sions: To treat complicated severe comminuted tibia fracture and bone defects, the primary FTV should be attached great importance to. There are positive availabilities in the reconstructions of tibia bone defects with primary FTV. But the time of bone union was rather longer.

极低频电磁场照射后细胞间的通讯
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科学通报 , 2006,
Abstract: 低频脉冲电磁场能够影响成骨细胞的增殖,但其机理还有待研究.使用15Hz,4mT矩形电磁场照射新生鼠颅骨细胞,MTT方法测量细胞的增殖率,通过电磁屏蔽与光隔离方法研究细胞间的通讯.结果表明,电磁场照射后的细胞能够辐射一种光信号,受电磁场照射的成骨细胞可以通过这种光辐射的通讯方式促进未受电磁场照射的正常成骨细胞的增殖(P<0.05).
保护地越冬茬辣椒花果期管理技术
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北方园艺 , 2013,
Abstract: 保护地越冬茬辣椒花果期的科学管理对于辣椒的产量和品质有着至关重要的影响,通过合理的控制室温、湿度和水肥追施能够有效的提高辣椒的长势、避免病害发生,从而提高辣椒的种植效益。现简要介绍了保护地辣椒花期、果期及日常管理关键技术。
基于数据库网络的护理岗位分层绩效考核体系的建立与成效分析
The Establishment and Effect Analysis of the Hierarchical Performance Evaluation System of Nursing Post Based on Database Network
 [PDF]

, 马超, 翠萍,, 陈蒲兰
Service Science and Management (SSEM) , 2016, DOI: 10.12677/SSEM.2016.52005
Abstract:
目的:通过医院的数据库网络信息化管理平台为依托,建立护理人员岗位分层绩效考核系统,提高肿瘤专科医院护理人员工作效率及服务品质。方法:根据Delphi法确定由护士工作量、工作质量、职称、年资、岗位及学历组成的护理人员层级绩效考核系统嵌入医院的HIS系统,实施对护士的层级绩效考核,比较层级绩效考核前后护士离职率、患者对护理工作满意度、护士医生对护理工作满意度、护理质量得分等情况。结果:层级绩效实施后护士离职率低于实施前(p < 0.05),护理质量检查得分高于实施前(p < 0.05),实施前后患者对护理工作满意度、护士医生对护理工作满意度均有差异有统计学意义(p < 0.05),实施前后护士护理工作绩效评价自评与他评均有差异有统计学意义(p < 0.05)。结论:基于数据网络化的护理岗位层级护理绩效管理体系,有利于提升肿瘤专科医院护理人员的工作效率及职业价值,提高医院整体管理水平及服务品质,有力促进优质护理服务的深化。
Objective: Based on the hospital database network information management platform, we establish the nursing staff post hierarchical performance evaluation system and improve the quality of service of the hospital nursing staff. Methods: According to the Delphi method which determines the workload of nurses, quality of work, title, seniority, position and degree of nursing staff level of performance appraisal system get into the hospital HIS system to appraise the implementation of performance level of nurses, level of performance assessment and nursing turnover rate, the patient to nurses the work degree of satisfaction, doctors and nurses to nurses the work degree of satisfaction and nursing quality score, etc. Results: The after implementation of the level of per-formance of nurse turnover rate is lower than before (p < 0.05); the nursing quality examination score is higher than before (p < 0.05); the implementation of the patients before and after nursing job satisfaction, doctors and nurses to nursing job satisfaction were different with statistical signi-ficance (p < 0.05); the implementation of before and after the nurses’ work performance evaluation of self rating and other rated the differences were statistically significant (p < 0.05). Conclusion: Based data networking nursing post level nursing performance management system can enhance the tumor hospital nursing staff’s work efficiency and occupation value, improve the hospital management level and service quality, and have a strong impetus to the deepening of the quality of nursing service.
新疆地区实习护生自我效能感与护生护理专业临床沟通能力的关系研究
Research on the Relationship between Self-Efficacy of Nursing Students and Clinical Communication Ability of Nursing Students in Xinjiang Area
 [PDF]

,, 马梅, 翠萍
Advances in Education (AE) , 2016, DOI: 10.12677/AE.2016.62008
Abstract:
目的:调查新疆地区实习护生自我效能感及护生护理专业临床沟通能力的现状水平,分析探讨一般自我效能感与护生护理专业临床沟通能力的相关关系。方法:采用一般情况问卷、一般自我效能感量表和护生护理专业临床沟通能力量表,对194名实习护生进行问卷调查,采用回归分析,探讨一般自我效能感量表和护生护理专业临床沟通能力的关系。结果:实习护生一般自我效能感总分为2.71分 ± 0.57分,低于成人常模,其中少数民族护生自我效能感得分高于汉族护生P < 0.05;男生自我效能感高于女生,P < 0.05,护生专业沟通能力总分为84.62分 ± 14.15分,处于中等水平,采用Pearson相关分析护生一般自我效能感与护理专业临床沟通能力成正相关(r = 0.327, P < 0.01)。结论:实习护生自我效能感低于常模,处于中等偏上水平,护生护理专业临床沟通能力处于中等水平,均有待进一步提高,同时,提高护生一般自我效能有助于提高护生护理专业临床沟通能力,护理教育者应采取有效的干预措施以提高护生自我效感水平,进而提高护生的临床综合核心能力。
Objective: To investigate nursing students’ self-efficacy in Xinjiang area as well as the status level of clinical communication ability of nursing students, and to analyze the relationship between the general self-efficacy and clinical communication ability of nursing professional students. Methods: Using the general condition questionnaire, general self-efficacy scale and clinical communication ability of nursing professional students scale, 194 nursing students were surveyed. The relationship between general self-efficacy scale and clinical communication ability of nursing students was also explored by using regression analysis. Results: The interns’ general self-efficacy score was 2.71 + 0.57, lower than the adult norm, of which the minority nursing students’ self-efficacy scored higher than the nursing students of Han nationality (P < 0.05); boys’ self-efficacy was higher than girls’ (P < 0.05); nursing students’ professional communication ability score was 84.62 + 14.15, which is in the medium level; there is a positive correlation between nursing students’ general self-efficacy and clinical communication skills by using Pearson correlation analysis (r = 0.327, P < 0.01). Conclusion: The interns’ self-efficacy is lower than the norm, which is above the medium level, and the clinical communication ability of nursing students is in the medium level; all need to be further improved. At the same time, improving nursing students’ general self-effi- cacy helps to improve nursing students’ professional clinical communication ability; nursing educators should take effective intervention measures to improve the level of nursing students’ self- efficacy, so as to improve clinical comprehensive core competence of nursing students.
系统分析程序预测MDNBR的保守性研究
Conservative Study of the System Analysis Code in the MDNBR Prediction
 [PDF]

, 胡艺嵩, 陈军,, 金红
Nuclear Science and Technology (NST) , 2016, DOI: 10.12677/NST.2016.42004
Abstract: 为衡量压水堆偏离泡核沸腾的程度,已通过试验开发了专门的临界热流密度关系式来与堆芯实际热流密度测量后计算值进行比较,得到堆芯的最小偏离泡核沸腾比(MDNBR),这些关系式或实验数据已被植入系统分析程序用于设计和瞬态分析。本文基于OECD压水堆燃料组件临界热流密度实验数据,采用不同建模方法研究了系统分析程序RELAP5计算MDNBR的保守性,并与子通道分析程序FLICAIII-F进行了比较。结果表明:系统分析建模方法影响结果的保守性,采用平均通道法并不一定保守,采用平均通道和热通道结合的方法可以较为全面反映出燃料组件平均通道特性和热通道特性且计算结果偏保守,采用多通道分析方法相对较为保守但受限于计算资源能力;在进行系统安全分析且需要确定堆芯MDNBR时,堆芯模拟应考虑采用平均通道和热通道相结合的分析方法来获取MDNBR,同时应以系统分析程序计算结果作为参考性输入条件,采用专用的子通道分析程序进行更为现实和准确的MDNBR计算。
To judge the departure nucleate boiling degree in the PWR, special critical heat flux calculation relations based on the different experiments have been developed for comparing to the reactor real heat flux calculation. These correlations and experimental data have been written in the system code which is used to design and transient analysis. Based on the OECD PWR fuel assembly critical heat flux experimental data, different modeling methods are used with RELAP5 code to study the conservation of the calculated MDNBR. A calculation fruit from sub-channel analysis code FLICAIII-F is used to compare the RELAP5 results. The conclusion can be summarized as follows. The modeling method of the system analysis affects the final results conservation. The average channel method is not always conservative. The average channel and hot channel combined method can fully reflect the fuel assembly thermal characteristic both average channel and hot channel, and the result is most conservative. The fully channel method is relatively conservative but restricted by the computer resource capability. Therefore, to achieve the conservative MDNBR during the requiring core MDNBR of the system safety analysis process, the average channel and hot channel combined method of the core assembly modeling is strongly suggested. To obtain reality and accurate MDNBR value, a special sub-channel code calculation is required, which needs to extract the condition of MDNBR predicted by system code.
RETRAN-3D程序PWR DNB模型评价研究
Evaluation Study of the PWR DNB Model in the RETRAN-3D Code
 [PDF]

, 胡艺嵩, 金红,
Nuclear Science and Technology (NST) , 2016, DOI: 10.12677/NST.2016.42005
Abstract: 分别选用RETRAN-3D程序中用于计算压水堆(PWR)偏离泡核沸腾(DNB)的四个临界热流密度关系式模型、以国际5 × 5压水堆燃料组件临界热流密度实验数据为输入热工参数,计算了高、中、低压力范围内共35个实验工况的最小偏离泡核沸腾比(MDNBR),并以子通道程序FLICAIII-F的计算结果为参考基准对RETRAN-3D程序的计算结果进行了评价研究,重点分析了W-3公式、B&W-2公式、MacBeth公式和Bowring公式在较宽压力范围内的计算准确性,结果表明:W-3公式在高、中、低压力范围内计算准确度较其余三个公式好,且在高、中压力范围内与子通道分析结果最为接近;B & W-2公式相对比较适合中、高压范围内的计算,但在高压下偏差稍大,而在低压下偏差更大;MacBeth公式适合低压范围内计算,在中、高压下偏差较大;Bowring公式适合在高、中压范围内计算,在低压下误差较大。综上分析可得出:在用RETRAN-3D程序计算压水堆在较宽压力瞬变范围内的堆芯MDNBR值时,优选公式为W-3公式。
The paper separately chooses four critical heat flux correlations in the RETRAN-3D code which is used for Pressurized Water Reactor (PWR) Departure Nucleate Boring (DNB) calculation. Based on the international 5 × 5 pressurized water reactor fuel assembly critical heat flux experimental data used for input thermal parameters, 35 total experimental cases with widely pressure range of high, middle, low pressure are calculated to obtain the Minimum DNBR (MDNBR) results. The results of RETRAN-3D code are compared with the basically exactly value from sub-channel code FLICAIII-F. The calculation accuracy of the W-3, B&W-2, MacBeth and Bowring formula in a wide range of pressure is specially analyzed. The results show that, the accuracy of the W-3 formula in a wide range of pressure is better than the other three formulas, and its results are most close to the sub-channel code results in the high and middle pressure range. It is acceptable for B&W-2 formula in the high and middle pressure range, but the deviation in the high pressure is big and especially bigger in low pressure. The MacBeth formula is proper for low pressure, not for high and middle pressure range. The Bowring formula can be used in high and middle pressure range, not in low pressure. The final conclusion is that, during the PWR core MDNBR calculation using RETRAN-3D code in the relatively wide pressure range, the preference critical heat flux model is W-3 formula.
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