Application of Continuous Compaction Technology in the Quality Control and Acceptance of High-Speed Railway Subgrade

On the basis of the theory of continuous compaction technology, we put forward the vibratory compaction value （VCV） index measured by a roller compactor, in order to evaluate the quality of continuously compacted subgrade. The relationships between the VCV index and the currently used indexes K30, Evd, Ev1 and Ev2, were explored by analyzing the experimental data collected from two test sections on the Beijing - Shanghai High-Speed Railway. The result shows that the VCV index has a linear relationship with the currently used indexes.

Analysis on Construction Quality Control Technology of Reinforced Concrete Shear Wall Structure

In the process of continuous development of construction enterprises, new requirements have been put forward for construction projects. By strengthening the construction quality control of reinforced concrete shear wall structure, the construction level of reinforced concrete can be continuously improved, the construction quality can be guaranteed, and the construction project can be successfully completed, which is worthy of extensive application and promotion in construction enterprises, thus providing a broader development space for construction enterprises.

Construction Technology and Quality Control of Double Layer Continuous Paving of Cement Stabilized Macadam Base

The construction method of continuous paving of the upper and lower base of the water stable macadam base can improve the construction efficiency,overcome the quality problems of the traditional layered paving of the upper and lower base,such as untimely curing,slow construction,poor interlayer bonding,contraction joint and interlayer,so as to ensure the construction quality of the water stable macadam.It is also the promotion and application of new technology.

Development and application of titanium alloy casting technology in China

The development and research of titanium cast alloy and its casting technology, especially its application in aeronautical industry in China are presented. The technology of molding, melting and casting of titanium alloy, casting quality control are introduced. The existing problems and development trend in titanium alloy casting technology are also discussed.

Development of chromatographic technologies for the quality control of Traditional Chinese Medicine in the Chinese Pharmacopoeia

As an important branch of medicine, Traditional Chinese Medicine(TCM) has been applied for the treatment of diseases for thousands of years in China and other countries in East Asia. The Chinese Pharmacopoeia(ChP) is a drug code formulated by the Chinese government, and it includes a special volume for the monographs of TCM, which plays an important role in ensuring the quality of drugs. The use of quality control technology has always been a complex and important factor in TCM. Owing to the chemical diversity of TCM, chromatography technology has been proven to be a comprehensive strategy for the assessment of the overall quality of TCM and has become the main analytical method in the ChP.This article provides an overview of the classical and modern chromatographic technologies applied in the ChP, and summarizes the advantages and disadvantages of each technique in the TCM monographs.In 2020, the new edition of the Ch P(the 2020 edition) has been implemented at the end of 2020. This paper also contains a brief introduction about the application of chromatographic technologies in the new edition of the ChP.

Determination of Factors and Quality Control of Car Painting Based on FMEA and SPC.V2

The global automotive industry demands world-class levels of product quality, productivity, and competitiveness as well as continual improvement. To achieve this goal,?many vehicle manufacturers companies use?quality control tools to improve the quality of the product with zero defects and highly satisfied to the customer. Nowadays, there are a lot of quality tools applied to solve the problem quickly but it’s still the fact to find out good and efficient solving way. The study emphasizes the identification of potential failure which failures may have encountered in the production process and it will lead to car scrap, rework and influence of the internal production and quality target. After the complete study of the manufacturing process and production data-failure causes, failure rate and data etc. FMEA discover the weak processes in the form of higher risk priority number in the manufacturing of the car painting process, which required reducing by identifying and implementing of the defects and this will improve the process quality of the painting surface of the car. To analysis, the improvement of the car surface defects SPC (Statistical Process Control) tools are more efficient where can easily visible the defects trends. SPC chart is chronological graphs of process data that are used in manufactures industries to help understand, control and improve the process and that although based on statistical theory area easy for practitioners to use and interpret. In order to orient goal of zero defects of the car, surface uses the PFMEA technique to prioritize?the defects and statistically analyze the roots cause of the defect and control the defects through continues improvements process.

Quality Control at Nomophobia and Dependency to Technological

This study aims to investigate the phenomenon of technological gadget usage among pre-university students,which include the time spent using them,as well as their purpose and influence.A descriptive research design was adopted in this study.131 pre-university students were randomly selected to answer a structured questionnaire.They were informed two weeks earlier to keep track on their time spent on technological devices,before answering the questionnaire.Findings showed that 99.2%of the respondents owned at least two technological gadgets,and all respondents own a smartphone.The main two gadgets that respondents spend at least 4 h a day on are smartphones(65.6%)and computers/laptops(21.4%).This indicates that smartphones are commonly used and owned among the respondents.The majority of the respondents are moderately nomophobia and moderately dependent on smartphones(70.2%and 66.4%,respectively).Correlation analysis demonstrates that the total time spent on gadgets in a day has a significant positive correlation with gadget dependency and total number of gadgets owned.Meanwhile,logistic regression was conducted to estimate the probability of nomophobia and dependency using total time spent and total number of technological gadgets.From thefindings,it was demonstrated that when the total time spent on using technological gadgets increasing,there is greater probability that the respondents develop nomophobia and dependency.This indicates that nomophobia and dependency to technological gadgets can be used to predict lifestyle profiles.The use of technological gadgets can bring both benefit and harm to its user.In light of this,user has to remain rational in order to derive maximum benefit from it.

Quality control for bloom casting of YQ450NQR1 steel

To reduce surface depression of a bloom, the primary cooling intensity was decreased, and the water distribution of mold wide and narrow faces was optimized. The length of secondary cooling zones and the specific water flow were increased, and the water flow distribution among the secondary cooling zones was adjusted to eliminate central defects, such as center looseness, central segregation, and center line cracks. The operation showed that the proportion of surface depression decreased from 37.22% to 2.87%, whereas the proportion of center looseness for 〈1.0 increased from 79.71% to 90.70%, the proportion of central segregation for 〈0.5 increased from 1.45% to 44.19%, and the proportion of center line cracks that are free increased from 39.13% to 62.79%. The qualified blooms are delivered to produce 310 Z-beam, whose yield strength is greater than 450 MPa.

Propagation form of internal cracks induced by continuous casting soft reduction and control strategy for internal quality

The propagation form of internal cracks induced by continuous casting soft reduction and the control strategy for enhancing the internal quality of 45 steel through industrial trials and a three-dimensional flow-heat transfer-solidification coupling model were investigated.The results showed that the internal cracks induced by soft reduction exhibited a characteristic of being"coarse in the middle and fine at both ends",and displayed an elliptical arc distribution on the loose side of the strand cross section.The cracks originated within the brittle temperature range and propagated inward to the liquid impenetrable temperature and outward to the zero ductility temperature or below.The control strategy for enhancing the internal quality of the 45 steel strand through soft reduction is to adjust the casting speed or the reduction zone appropriately,ensuring that the central solid fraction of the reduction zone falls within the range of 0.33-0.99.At this point,a reasonable reduction amount is allocated to eliminate the center shrinkage cavities and center segregation,even if it results in minor reduction-induced cracks.

TECHNIQUES ABOUT DIRECT OPTIMIZING CONTROL OF GREEN SAND QUALITY

Green sand casting is still a main method in the world at present and it isvery significant to develop the technology of controlling green sand quality. A new concept, fromcontents test to contents control, is advanced. In order to realize the new idea, a new method toon-line test active clay and moisture of green sand - double powers energizing alternately (DPEA)method is put forwards. The principle of the new method is to energize standard sand sample with ACand DC powers and to test the electric parameters, and then, to calculate active clay and moistureof green sand by using artificial neural network (ANN). Based on this new method, a directoptimizing system for controlling green sand quality is developed. Techniques about testing andcontrolling methods, hardware and software are discussed.

钻孔灌注桩在基坑维护施工中的质量控制措施

结合实际案例,按照钻孔灌注桩施工工艺流程顺序,从钻孔前、钻孔中、成孔、钢筋笼吊装及混凝土浇筑等环节,对钻孔灌注桩在深基坑维护施工中的质量控制措施进行简要分析,如钻孔前应建立合理的质量控制流程等;钻孔过程中要做好护筒埋设、设备就位与安装、成孔等环节的质量控制;钢筋笼吊装要做好钢筋笼起吊点计算等工作;混凝土浇筑应避免堵孔、断桩等质量缺陷。

影像检查规范化及管理体系建设与实施

基于“健康中国”战略的正式实施,为响应我国“十四五”时期党中央以及国务院对于人民群众医疗高质量发展的要求,通过优化医疗资源的利用效率,降低就医负担,并保障医疗质量以及安全;其内容包括影像检查规范化。本研究基于文献查阅以及江苏省影像规范化执行现状提出建设性意见和建议;影像检查规范化需要行政部门和医疗机构的体系支撑,同时还要有行业以及设备厂家的技术保障;行政主管部门制定和定期更新符合我国国情的影像指南以及具体实施细则,加强影像平台数据库建设,建立影像检查管理与评估体系,加大影像质控覆盖范围。医疗机构基于影像检查指南以及相关制度,强化培训并严格落实考核制度,执行影像检查和报告的智能质控和评价系统;开设独立的影像门诊或多科室联合门诊,提高临床诊疗的科学性和精准性。医务人员加强学习和执行相关检查指南以及实施细则,基于多学科诊疗平台提高规范化影像检查水平,积极开展影像新技术的研发和应用,提高影像检查的高效性和诊断的精准性。通过制定统一的符合我国国情和时代的影像指南以及影像工作实施细则,执行具体规范措施和方案,大力推进影像检查规范化。

科技创新推动茶叶质量安全全程管控能力提升

现阶段我国茶叶质量安全水平高,饮茶安全有保障。茶叶饮用安全得益于茶叶科技创新日益发展,茶园绿色防控技术、清洁化茶叶加工技术、茶叶质量安全精准检测技术与风险评估理论创新,将茶叶质量安全从末端监管调整到从茶园到茶杯的全过程,为茶叶质量安全风险监测、风险控制与风险管理提供强有力的科学支撑。性诱剂化学生态防控技术、杀虫灯与诱虫色板物理诱杀技术、茶尺蠖与茶毛虫病毒生物防治技术、以草抑草绿色除草技术等茶园绿色防控技术从源头提升了茶叶农药残留控制水平;清洁化能源加热替代传统的燃煤燃材加热方式,显著降低了茶叶加工中环境污染物和重金属等有害物质的污染;质谱创新技术将茶叶质量安全检测提升到高通量精准检测与非靶向筛查水平,速测创新技术前移了茶叶农药残留的监测环节。文章介绍了近年来我国茶叶质量安全水平,分析了科技创新对茶叶质量安全全程管控能力提升的推动作用。

典型特种设备质控数字化关键技术研究与应用概述

特种设备在各行各业被广泛使用,作为国民经济的重要基础装备,存在量大面广、重要性高、危险性大等特征,设备快速增长导致防控资源不足、质控效能不高。近几年,随着人工智能等新一代数字化技术的发展,为特种设备质量安全风险防控效能提升带来新的契机,为特种设备监管、检验、应急、维保等开辟新型业务模式奠定了技术基础。本文主要介绍“典型特种设备质控数字化关键技术研究与应用”项目的背景、目标、方案、路线、内容、创新、成果和效益等相关内容。

社会责任履行对企业绿色技术创新的影响研究——基于A股上市公司经验证据

基于中国2010-2020年沪深A股上市公司的面板数据进行了分析。研究结果表明,企业履行社会责任能显著促进其进行绿色技术创新活动。同时,内部控制质量在其中起到了中介作用,这种促进作用在不同所有制和不同行业背景下效力不同。

肉制品发酵技术对肉品品质的调控及应用研究进展

发酵是现代食品工业中一种重要的加工技术,可用于大规模生产发酵肉制品。本文探讨了发酵技术对肉制品品质的调控作用,从发酵剂的筛选与构建、发酵剂的接种策略、影响发酵的因素及工艺优化三个方面概述了发酵剂和发酵工艺在肉制品加工中的研究与应用现状,并讨论了发酵技术在我国肉制品产业应用中的发展趋势。总的来说,新型发酵技术的应用打破了传统肉类产业的局限性,未来可针对不同发酵肉制品品质需求特点,调整发酵工艺和策略,生产符合现代人们生活需要的营养、美味、安全和多样化的发酵肉制品。

仿生技术在中药质量控制领域的应用研究进展

中药的气味与质量存在紧密的联系,《中华人民共和国药典》2020年版中绝大多数药材和饮片性状项下都有对其气、味的描述。然而,在实际的中药质量控制过程中有关气、味的鉴别较为主观、个体差异较大,缺乏客观的量化判断标准。作为近年来发展起来的新技术,电子鼻、电子舌等仿生技术可一定程度代替人的感官,将气、味信息转化为量化指标,完成对药材气、味的评价,更具现代科学性和客观性。对此类技术在中药质量控制领域,如鉴别、炮制规律、毒性中药质量控制及中药物质基础等方面的应用进展进行综述,以期为中药研究和中药质量控制提供新的思路。

消减大豆连作障碍的养分调控技术研究进展

为明确不同养分调控技术对大豆连作障碍消减的作用,本文阐述了大豆连作障碍的发生与危害。从提高肥料养分供应能力、改善土壤理化性状和优化土壤微生物环境3个方面分别综述了针对大豆连作障碍中不同危害的解决方案。通过改变施肥方式、时间、数量等方式解决大豆长期连作导致土壤中养分偏耗和影响大豆生长发育的问题;通过使用不同改良剂针对性地解决土壤酸化、板结、保水保肥能力下降的问题;在大豆连作土壤中接入有益微生物,从而降低有害微生物及病原菌的活性,最终达到改善土壤微生物环境的效果。最后总结得出,消减大豆连作障碍过程中尚待解决的问题以及养分调控技术的研究方向,为大豆连作障碍的发生发展机理的研究、养分调控技术的优化改良提出建议和展望。

在线检测技术在中药饮片智能化生产与质量控制中的研究现状与展望

中药饮片产业是中药产业三大支柱之一,保证饮片的质量和安全性一直是重中之重的工作。传统的中药质量控制方法存在周期长、效率低、主观性强等问题,无法适应产业的快速发展。在线检测技术通过在线监测系统实时采集、处理和分析样品数据,能够更快速、准确地得到产品质量信息,对中药饮片的智能化生产和质量控制具有重要意义。从国家政策导向阐明中药智能化生产对中药饮片质量控制的重要性,对在线检测关键技术研究及其在饮片生产全过程中的应用进行综述,归纳当前在线检测技术在中药产业应用中存在的问题,为加快在线检测技术与饮片产业融合发展提供建议,以期为提高饮片生产效率及质量、促进饮片产业高质量发展提供参考。

基于AI的刀具磨损对刨花质量和刨花板性能影响的评估

为推动人造板智能制造的发展,本文建立了一种基于AI计算机视觉技术的刨花尺寸与形状的检测方法,能自动识别刨花尺寸大小并区分出杆状、类矩形、类三角形和其他型4种刨花形状。在此基础上,对在不同切削时间的刨花形态变化、刨片机刀具磨损程度和工作电流进行了监测和诊断。同时,用这些刨花分组制备了相应的刨花板,并对其物理力学性能进行测试,建立了刨片机刀具磨损程度、电流消耗量、刨花形态与刨花板性能的数学关系模型,并找到刨片机优化换刀时间。结果表明:基于AI的刨花形态检测不但能够监测刀具磨损过程中刨花形态的变化,还可以有效预测刨花板的产品性能。在给定的生产条件下,刨片机开机运行2~4 h内切削出的刨花所制造的刨花板综合性能最好。