Improved EEMD-based standardization method for developing long tree-ring chronologies

Long tree-ring chronologies can be developed by overlapping data from living trees with data from fossil trees through cross-dating.However,low-frequency climate signals are lost when standardizing tree-ring series due to the"segment length curse".To alleviate the segment length curse and thus improve the standardization method for developing long tree-ring chronologies,here we first calculated a mean value for all the tree ring series by overlapping all of the tree ring series.The growth trend of the mean tree ring width(i.e.,cumulated average growth trend of all the series)was determined using ensemble empirical mode decomposition.Then the chronology was developed by dividing the mean value by the growth trend of the mean value.Our improved method alleviated the problem of trend distortion.Long-term signals were better preserved using the improved method than in previous detrending methods.The chronologies developed using the improved method were better correlated with climate than those developed using conservative methods.The improved standardization method alleviates trend distortion and retains more of the low-frequency climate signals.

Smart Society and Artificial Intelligence:Big Data Scheduling and the Global Standard Method Applied to Smart Maintenance

The implementation of artificial intelligence(AI)in a smart society,in which the analysis of human habits is mandatory,requires automated data scheduling and analysis using smart applications,a smart infrastructure,smart systems,and a smart network.In this context,which is characterized by a large gap between training and operative processes,a dedicated method is required to manage and extract the massive amount of data and the related information mining.The method presented in this work aims to reduce this gap with near-zero-failure advanced diagnostics(AD)for smart management,which is exploitable in any context of Society 5.0,thus reducing the risk factors at all management levels and ensuring quality and sustainability.We have also developed innovative applications for a humancentered management system to support scheduling in the maintenance of operative processes,for reducing training costs,for improving production yield,and for creating a human–machine cyberspace for smart infrastructure design.The results obtained in 12 international companies demonstrate a possible global standardization of operative processes,leading to the design of a near-zero-failure intelligent system that is able to learn and upgrade itself.Our new method provides guidance for selecting the new generation of intelligent manufacturing and smart systems in order to optimize human–machine interactions,with the related smart maintenance and education.

Using Different Standardized Methods for Species Identification:A Case Study Using Beaks from Three Ommastrephid Species

The cephalopod beak is a vital hard structure with a stable configuration and has been widely used for the identification of cephalopod species. This study was conducted to determine the best standardization method for identifying different species by measuring 12 morphological variables of the beaks of Illex argentinus, Ommastrephes bartramii, and Dosidicus gigas that were collected by Chinese jigging vessels. To remove the effects of size, these morphometric variables were standardized using three methods. The average ratios of the upper beak morphological variables and upper crest length of O. bartramii and D. gigas were found to be greater than those of I. argentinus. However, for lower beaks, only the average of LRL(lower rostrum length)/LCL(lower crest length), LRW(lower rostrum width)/LCL, and LLWL(lower lateral wall length)/LCL of O. bartramii and D. gigas were greater than those of I. argentinus. The ratios of beak morphological variables and crest length were found to be all significantly different among the three species(P < 0.001). Among the three standardization methods, the correct classification rate of stepwise discriminant analysis(SDA) was the highest using the ratios of beak morphological variables and crest length. Compared with hood length, the correct classification rate was slightly higher when using beak variables standardized by crest length using an allometric model. The correct classification rate of the lower beak was also found to be greater than that of the upper beak. This study indicates that the ratios of beak morphological variables to crest length could be used for interspecies and intraspecies identification. Meanwhile, the lower beak variables were found to be more effective than upper beak variables in classifying beaks found in the stomachs of predators.

Design Method of Equipment Optimization Development Based on Standardization Theory

The matters of equipment optimization development are usually discrete,fuzzy and non-quantitative.It is difficult directly to optimize the equipment development with a mathematical model.A set of methods for designing the equipment optimization development with six dimensions and eight main elements is established based on the theory and method of standardization.The top-tier design space of systematic development of equipment is built up by the relations of basic models,series and model spectrums.The relations of time and space for equipment optimization development are established.The design processes of a six dimension systematic space are expounded.The connotation of each plan in the main system space is analyzed.A design method for an entire equipment is established with standardization theory.The coordinating design methods of equipment technical system and the optimization design methods of equipment integration are discussed.The design methods for universalization and serialization of components and parts are established.The design methods of equipment optimization development highlight the relations of the basic model of platform,the serialization of platform basic models,the modularization of equipment functions,the model spectrum of variant equipment,and the universalization and serialization of components and parts.

Quantitative Determination of Tetrachlorantraniliprole by(1)^H NMR Spectroscopy with Internal Standard Method

[Objective]This study was to establish a rapid,specific and simple method for quantitative determination of tetrachlorantraniliprole by 1H NMR.[Method]1H NMR spectroscopy was acquired with deuterium DMSO as the solvent and maleic acid as internal standard under the conditions of temperature 25℃,pulses width 8.0μs,delay time 5 s,and scanning times 8.[Result]The hydrogen proton peaks of tetrachlorantraniliprole(δ=10.55)and maleic acid(δ=6.27)were taken as quantitative peaks.The peak area ratio y(As/Ar)and mass ratio x(ms/mr)were linearly regressed,and the correlation coefficient was 0.9999.The RSD value of repeatability test was 0.38%,and the RSD value of stability test was 0.77%.The content of tetrachlorantraniliprole was determined as 99.6%.[Conclusion]1H NMR spectroscopy can be used for quantitative determination of tetrachlorantraniliprole without standard reference,which is rapid,accurate and simple.

The Research on Methodology for Material Code Standardization in the Implementation of MRP－Ⅱ

This paper analyses the current common problems of material code standardization in the implementation of MRP Ⅱ, and puts forward the basic ideas and methods for solving the problems, which has some reference value for the popularization of application o

Analytical and Traveling Wave Solutions to the Fifth Order Standard Sawada-Kotera Equation via the Generalized exp(-Φ(ξ))-Expansion Method

In this article, we propose a generalized exp(-Φ(ξ))-expansion method and successfully implement it to find exact traveling wave solutions to the fifth order standard Sawada-Kotera (SK) equation. The exact traveling wave solutions are established in the form of trigonometric, hyperbolic, exponential and rational functions with some free parameters. It is shown that this method is standard, effective and easily applicable mathematical tool for solving nonlinear partial differential equations arises in the field of mathematical physics and engineering.

Synthesis of an IS and Steviol Glycoside Analysis by a Validated Internal Standard Method

The internal standard (IS) method is the best method for the analysis of samples, as it is independent of errors in injection volume, changes in sample volumes, and changes in sensitivity of the detector, etc. Use of an internal standard allows for the correction of losses due to sample clean-up of complex samples. An ideal IS is a compound that has properties very similar to, and that behaves as the compounds to be analysed. Ideally, only in the last step of analysis (HPLC), the IS should be well separated from the compounds of the mixture to be analysed. After testing several existing compounds with negative results, we decided to synthesise the 19-O-β-D-galactopyranosyl-13-O-β-D-glucopyranosyl-steviol as IS. This is the 19-galactosyl ester of steviolmonoside (13-O-β-D-glucopyranosyl-steviol). The IS was made according to published methods. Steviolmonoside (SM) was made from purified commercial rubusoside (Rub) by refluxing it in 10% KOH for 2 h. SM was precipitated and crystallized from MeOH. The hydroxyls of the glucose unit of SM were protected by acetylation. The acetylated SM was crystallized from acetone and dissolved in 1,2-dichloroethane. Then Ag2CO3 on Celite and tetra-acetylated galactopyranosyl bromide were added and the mixture was refluxed for 2 h. After cooling, BaO in MeOH was added to remove the acetyl groups. The 1,2-dichloroethane fraction was then extracted three times with equal volumes of water and the water fraction containing the IS was further purified on a C18 flash chromatography column. Traces of unreacted SM were removed by preparative HPLC on an Alltima C18 column (250 mm × 22 mm, particle size 10 μm) with AcCN:water (35:65, 20 ml/min). Detection was at 210 nm (KNAUER, “Smartline” UV detector 2500). The collected IS fraction from the HPLC was completely dried. Mixtures of steviol glycosides (SVglys) containing IS could be purified over SPE cartridges without change of the SVgly over IS ratio. The calibration curves for rebaudioside A (RebA) and stevioside (ST) were linear between 0.012 and 0.95 and between 0.013 and 1.13 mM for RebA and ST, respectively. The accuracy was checked by the standard addition method. It was concluded that the IS method gives an excellent precision and accuracy.

Simultaneous Determination of Uranium and Thorium with Standard Dual-addition Method

dual-standard addition method was proposed and the principle of simultaneous determination for a interfering binary mixtures was discussed. The proposed procedure was applied to spectroscopic analyses for the simultaneous determination of uranium and thorium without prior separation. Various molar ratios of uranium/thorium, from 0.5∶1 to 10∶1, can be determined with satisfactory precision and accuracy. Uranium and thorium content in a phosphate ore and simulated sample were determined, the recoveries were 98.4%～102.5% for uranium and 96.8%～102.3% for thorium, the relative standard deviations (R.S.D) were 1.5%～2.3% for uranium and 2.1%～3.1% for thorium.

The Measurement and Uncertainty Analysis of Antenna Factor of Microwave Antennas Based on Standard Site Method

A method of Standard Site Method (SSM) in the American National Standards Institute’s ANSI C63.5 is described in the frequency ranges from 30 MHz to 1000 MHz. And a measurement system is set up for determining antenna factors (AF) of antennas on an Open Area Test Sites (OATS). AF of antennas including log-periodic antenna and biconical antenna is measured with SSM method by Shanghai Institute of Measurement and Testing Technology (SIMT), which shows good agreement to data measured by National Institute of Metrology (NIM). In the end, it analyzes the measurement uncertainty of SIMT in the 30 MHz to 1000 MHz frequency band and does comparison to that of NIM.

LA-ICP-MS Calibrations for Intact Rock Samples with Internal Standard and Modified Constant-Sum Methods

Laser ablation coupled with inductively coupled plasma-mass spectrometry (LA-ICP-MS) calibration was conducted with multiple spot analyses on eleven intact rock samples using both an internal standard (IS) method and a modified constant-sum (MCS) method. Methods were then compared for reported bulk elemental composition of the rocks. The MCS method was based on the sum of eight major elements, which is spatially more stable than one single major ele-ment as used in the IS method, and is quite constant among different rock samples. Calibrations were performed with standard reference materials NIST SRM 610, 612, 614, and 616. Little difference was found between using a single standard and a set of standards, because of the good linearity shown by the reference materials. Comparison of the two calibration methods shows that the MCS method produced better and more stable results than the IS method for heterogeneous samples. With the MCS method, approximately 94% to 95% of the total measurements are within the range of ±100% relative deviation, compared with 82% to 86% with the IS method. The IS method resulted insubstantial overestimations for some rock samples (e.g., 648% for Basalt BCR-2 using NIST SRM 610 as the calibration standard), while the largest deviation with the MCS method was 216% for U in Eagle Ford shale #80 sample. For Quartz latite QLO-1, a relative homogeneous sample, the IS method generated slightly better results than the MCS method. Regardless of method, spatially heterogeneous distribution of elements in the intact rock at the scale of the laser spot is considered to be the main reason for the large relative deviations seen in our work compared to published results.

Application and Development Trends of Spectral Analysis in Draft of Non-Ferrous Metal Standards in China

Spectral analysis was a method of identifying substances, determining their chemical composition and calculating their content based on their spectral characteristics. This paper mainly discussed the application of various spectroscopic techniques, mainly including atomic absorption spectrometry (AAS) inductively coupled plasma emission spectrometry (ICP-AES) X-ray fluorescence spectroscopy (XRF) atomic fluorescence spectroscopy (AFS) direct reading spectroscopy (OES) glow discharge emission spectroscopy (GD-OSE) laser-induced breakdown spectroscopy (LIBS), in the formulation of non-ferrous metal standards in China. The AAS method was the most widely used single-element microanalysis method among the non-ferrous metal standards. The ICP-AES method was good at significant advantages in the simultaneous detection of multiple elements. The XRF method was increasingly used in the determination of primary and secondary trace elements due to its simple sample preparation and high efficiency. The AFS was mostly detected by single-element trace analysis. OES GD-OES and LIBS were playing an increasingly important role in the new demand area for non-ferrous metals. This paper discussed matrix elimination, sample digestion, sample preparation, instrument categories and other aspects of some standards, and summarized the advantages of spectral analysis and traditional chemical analysis methods. The new methods of future spectroscopic technology had been illustrated in the process of developing non-ferrous metal standards.

Compilation Principles and Methods of China’s First Mongolian Standard in Meteorological Industry

Mongolian Terms Commonly Used in Meteorological Services that was issued by the China Meteorological Administration is China s first traditional Mongolian standard in meteorological industry. In the process of formulation, the compilation unit fully complied with the principles of scientificity, practicability, universality and versatility, and used literal translation, free translation, and the combination of literal translation and free translation to translate and compile 71 mongolian terms commonly used in meteorological services. The standard fills the blank of standardization construction of basic traditional Mongolian language in the meteorological industry of China.

密封电子元器件与装置多余物检测发展综述

密封电子元器件与装置作为航天系统中的重要组成部分,具有高精密性、高可靠性以及高复杂性的典型特点,而多余物问题是严重影响其高可靠性的主要因素之一。随着航天技术的快速发展,多余物检测技术也在不断改进与深入。该文以认识多余物、控制多余物产生以及检测多余物为主线,围绕多余物的防控方法、检测方法、检测标准进行综合论述。着重分析了检测方法中的颗粒碰撞噪声检测(PIND)方法,分别从小型元器件多余物检测、中大型装置多余物检测两个角度,针对现有研究进展逐一进行了详细的介绍。在此基础上,结合现有国内多余物检测研究的现状,针对多余物检测的难点与未来发展趋势进行归纳,并提出了期望与目标。

Obtaining 2D Soil Resistance Profiles from the Integration of Electrical Resistivity Data and Standard Penetration Test (SPT) and Light Dynamic Penetrometer (DPL) Resistance Tests—Applications in Mass Movements Studies

In Brazil and various regions globally, the initiation of landslides is frequently associated with rainfall;yet the spatial arrangement of geological structures and stratification considerably influences landslide occurrences. The multifaceted nature of these influences makes the surveillance of mass movements a highly intricate task, requiring an understanding of numerous interdependent variables. Recent years have seen an emergence in scholarly research aimed at integrating geophysical and geotechnical methodologies. The conjoint examination of geophysical and geotechnical data offers an enhanced perspective into subsurface structures. Within this work, a methodology is proposed for the synchronous analysis of electrical resistivity geophysical data and geotechnical data, specifically those extracted from the Light Dynamic Penetrometer (DPL) and Standard Penetration Test (SPT). This study involved a linear fitting process to correlate resistivity with N10/SPT N-values from DPL/SPT soundings, culminating in a 2D profile of N10/SPT N-values predicated on electrical profiles. The findings of this research furnish invaluable insights into slope stability by allowing for a two-dimensional representation of penetration resistance properties. Through the synthesis of geophysical and geotechnical data, this project aims to augment the comprehension of subsurface conditions, with potential implications for refining landslide risk evaluations. This endeavor offers insight into the formulation of more effective and precise slope management protocols and disaster prevention strategies.

清单教学模式联合“找茬”法在民营医院护士规范化培训中的应用

目的:探讨清单教学模式联合“找茬”法在民营医院护士规范化培训中的应用效果。方法:选取2020年1月—12月南通瑞慈医院新入职护士63人作为对照组,实施传统护理培训模式;2021年1月—12月新入职护士60人作为观察组,实施清单教学模式联合“找茬”法,成立临床实践技能同质化培训考核小组、制定教学任务清单、“找茬”式培训。结果:观察组新员工临床技能考核中评估、评判性思维、总体评价3个维度的结果高于对照组,差异有统计学意义(P<0.05);观察组教学满意度中培训形式、课程设置、培训氛围、带教老师授课水平、提高理论水平、启发评判性思维、提高临床实践能力、培训的整体评价、收获程度9个维度的满意度高于对照组,差异有统计学意义(P<0.05);观察组岗位胜任力评价中临床工作质量;工作知识和技能;人际沟通、团队协作和自主创新精神;责任心、主动性和慎独精神4个维度的评价高于对照组,差异有统计学意义(P<0.05)。结论:清单教学模式联合“找茬”法培训形式更新颖、灵活,更有利于提高新护士学习的主动性、参与性,提高护士的综合能力、教学满意度和岗位胜任能力,更贴合现代护理模式对护理人员提出的新要求。

3D打印教具结合CBL教学法在神经外科住培中的应用

目的探讨3D打印教具结合以案例为基础的教学法(case-based learning,CBL)在神经外科住院医师规范化培训(简称住培)中的应用价值。方法选取2022年7月—2022年12月在绍兴市人民医院神经外科进行住院医师规范化培训的60名住院医师为研究对象,随机分为试验组(n=30)和对照组(n=30)。试验组采用3D打印教具结合CBL教学法进行教学,对照组采用传统CBL教学法进行教学,教具主要为普通影像学资料。培训结束后对2组学员进行理论知识考核、影像读片考核以及满意度评估,其中满意度又细分为提高学习兴趣、加深课程理解、提高操作能力、提高学习自信、提高沟通能力5个方面。结果试验组的理论知识考核成绩[(85.80±4.56)分]高于对照组[(82.30±5.47)],差异有统计学意义(P<0.05)。试验组的影像读片考核成绩[(84.73±3.94)分]高于对照组[(80.97±5.10)],差异有统计学意义(P<0.05)。试验组在提高学习兴趣、加深课程理解、提高操作能力方面的满意度(86.67%、66.67%、70.00%)均高于对照组(56.67%、36.67%、40.00%),差异有统计学意义(P<0.05)。试验组在提高学习自信、提高沟通能力方面的满意度(60.00%、73.33%)与对照组(53.33%、50.00%)比较,差异无统计学意义(P>0.05)。结论3D打印教具结合CBL教学法可以增强神经外科住院医师规范化培训的效果。

基于Delphi法构建全科住院医师规范化培训教学查房细化评分量表

目的探索构建标准化全科住院医师规范化培训教学查房细化评分量表。方法采用焦点小组法组织从事全科医学工作10年以上的专家进行讨论,初步构建《全科住院医师规范化培训教学查房细化评分表》。然后,由10名全科教学查房指导专家,根据指标的重要性、可行性及专家的积极性、协调性等进行两轮Delphi问卷咨询。最后,运用层次分析法计算各级指标的权重,确定评价指标体系。结果共进行2轮焦点小组讨论,5名成员对各级指标进行讨论修改分类,初步建立教学查房评估指标体系。10名咨询专家共进行2轮问卷咨询,问卷回收率均为100%。第一轮、第二轮专家咨询的权威系数分别为0.93,0.97,协调系数Kendall’s W分别为0.522,0.421,P<0.001。根据两轮专家咨询结果构建7项一级指标、20项二级指标、119项三级指标,其中一级指标的权重分别为0.0327、0.0464、0.1599、0.2815、0.1599、0.1599、0.1599,所有指标判断矩阵的一致性比率CR均小于0.1。结论本研究构建的全科教学查房细化评分体系合理、完整、可操作性好,多维度反映查房教师及住院医师表现,可作为全科教学查房评价的参考依据。

物联网国家标准验证点建设研究

本文梳理了国家标准化主管部门在标准验证方面的政策部署和批准标准验证点建设的举措,总结了在行业主管部门的推动下,物联网技术、产业、标准发展的情况。介绍了物联网标准验证的基础以及取得的成效,分析了物联网标准验证的重点、难点以及物联网标准验证点建设思路、技术路线,提出了物联网标准验证方法。本文提出的标准验证点建设思路以及标准全生命周期验证方法,对于其他类似领域的标准验证工作开展、标准验证点建设将具有参考价值和借鉴意义。

数字化多维度延展案例联合MDT教学在临床病理科住培中的应用

目的探讨数字化多维度延展案例联合临床多学科诊疗(multidisciplinary treatment,MDT)教学模式在临床病理科住院医师规范化培训(住培)中的应用效果。方法选取2020年9月至2023年8月在河南省人民医院临床病理科住培专业基地培训的36名住院医师为研究对象,随机分为2组,每组18名。观察组采用数字化多维度延展案例联合MDT教学,对照组采用传统教学模式。采用理论技能考核、教师评价及问卷调查评估教学效果。结果两组一般资料比较无统计学意义(P>0.05)。观察组理论知识和实践技能考核成绩均高于对照组(均P<0.05)。观察组病例分析及教师综合评价分数均高于对照组(P<0.05)。包括学习兴趣、理论知识巩固、技能提升、诊断思维方面的满意度问卷调查,观察组优于对照组(均P<0.05)。结论数字化多维度延展案例联合MDT教学在临床病理科住院医师培训中,有助于系统知识体系构建及临床实践能力提升,教学效果良好,应用前景广泛。