不同能级强夯施工下地表振动衰减规律的探讨

利用有限差分法对不同能级强夯施工引起的环境振动进行数值模拟研究,分析了不同能级强夯引起的地表振动衰减规律,强夯能级、土层厚度对强夯引起地表振动的影响。得出不同能级强夯施工作用下地表振动衰减规律,地表起伏对地表振动加速度传播的影响。

不同能级强夯处理软弱地基效果分析

依托广西钦州港区某大型工程地基处理实践,基于强夯前后多道瞬态面波测试和重型动力触探试验及夯后静载荷试验,对不同能级强夯加固处理软弱地基效果进行了检测与分析。现场检测结果表明：强夯加固处理后软弱区域地基承载力特征值和压缩模量仍不满足设计要求;软弱区外各能级区经过强夯处理后,地基承载力和土体工程特性得到明显改善,地基承载力特征值和压缩模量基本满足设计要求;2 000,3 000,6 000,8 000,10 000,12 000 k N·m能级有效加固深度分别约为2.5,4.0~6.0,6.0~8.0,7.0~10.0,8.0~11.0,8.0~13.0 m;建议对软弱区域根据基坑开挖深度采取相应的加固处理措施。结论以期为类似工程地质条件地基处理提供借鉴与参考。

不同能级矿震波对深部盘区大巷围岩扰动效应

进入深部开采,巷道围岩承受高静载,在局部复杂地质构造区域高水平应力的加持下,微小的动载产生的扰动效应即可诱发巷道冲击地压,不同能级矿震波对巷道产生不同的扰动效应,可以诱发巷道围岩不同位置的不同程度破坏。针对彬长矿区某煤矿一盘区大巷频繁发生冲击地压的问题,在分析巷道冲击微震监测能量特征的基础上,进行了数值模拟研究,通过应力、能量、位移表征了不同能级矿震矿震波对巷道围岩的扰动效应。结果表明:冲击地压发生前,微震监测偶有大能量事件出现,但是其余时间总频次和总能量处于较低水平,总能量往往小于10^(5)J,发生时,微震监测总频次和总能量骤增,总能量达到10^(5)J以上,发生后,微震监测总能量和总频次骤减,一段时间内处于静默状态;静载条件下,底板相比较顶板离层现象更显著,矿震扰动下,顶板相比较底板更易发生离层,10^(5)J及以下能级矿震扰动下,对巷道围岩产生的影响是顶板>底板>两帮,10^(5)J以上能级矿震扰动下,对巷道围岩产生的影响是顶板>两帮>底板。

不同能级护士凝血四项采血过程的调查分析

目的 调查不同能级护士凝血四项标本采集过程中存在的问题及影响因素,以便及时改进,促进标本采集规范化。方法 将NI、N2级护士定义为初中级护士,N3、N4级护士定义为高级护士,通过发放调查问卷,了解不同能级护士抽血操作过程,分析影响标本不合格的主要因素。结果 不同能级护士对凝血四项标本采集剂量、采集顺序及采集方法上均存在问题;对采血量及采血顺序不清晰的护士占62.0%,采血时间过早的占64.0%,采血过程中止血带扎得过紧的占80.0%。结论 不同能级护士在凝血四项采集操作上欠规范,需加强护理技术操作培训、考核,以降低因采集方法不当造成的标本不合格。

高能级强夯在砂丘地貌中有效加固深度的探讨

通过一个复杂的工程实例,分析了4 000 kN·m^18 000 kN·m六种能级的强夯在同一工程,同一地质条件下的有效加固深度和加固效果,并对按公式计算、按规范经验取值以及工程实际检测结果三种情况下的有效加固深度进行了比较分析,以供类似工程借鉴。

Geriatric nursing competence of clinical nursing staff at different hospital levels in Chongqing,China:A cross-sectional study

Objectives:This study aimed to survey the geriatric nursing competencies of clinical nursing staff in Chongqing City,China,and provide suggestions to enhance these competencies.Methods:This study was conducted in 204 hospitals in Southwest China from December 24,2022 to January 7,2023.The“Geriatric Nursing Competence of Clinical Nurse Investigation Tool”was used to explore factors that influence geriatric nurses’competencies via stratified sampling.The survey was conducted by distributing and collecting questionnaires through the online platform Wenjuanxing.Results:A total of 10,692 nurses answered the questionnaires.Of these questionnaires,9,442 were valid.The total geriatric nursing competence score of the clinical nursing staff was 2.29±0.81,the secondary hospital score was 2.23±0.78,and the tertiary hospital’s overall mean score was 2.33±0.83.The factors that influenced secondary hospitals included the department of medicine,age of nurses and total length of career(P<0.05).The factors that influenced tertiary hospitals included the department of medicine,age of nurses,nurses’professional title,and geriatric practical advanced nurses’certification(P<0.05).Conclusions:Geriatric nursing competence among clinical nursing staff is imbalanced at a lower-middle level and is influenced by various factors.Thefindings highlight the need for further clinical training in geriatric nursing.The training of geriatric nurses should focus on necessary clinical skills and on preparing them to adequately manage comprehensive geriatric syndromes.

Exact Eigenfunctions of N-body System with Quadratic Pair Potential

We obtain the energy spectrum and all the corresponding eigenfunctions of N-body Bose and Fermi systems with Quadratic Pair Potentials in one dimension. The original first excited state or energy level is disappeared in one dimension, which results from the operation of symmetry or antisymmetry of identical particles. In two and higher dimensions, we give the energy spectrum and the analytical ground state wave [unctions and the degree of degeneracy. By comparison, we refine A vinash Khare＇s results by making some items in his article precisely.