Dynamic grey model of verification cycle and lifecycle of measuring instrument and its application

Two dynamic grey models DGM (1, 1) for the verification cycle and the lifecycle of measuring instrument based on time sequence and frequency sequence were set up, according to the statistical feature of examination data and weighting method. By a specific case, i.e. vernier caliper, it is proved that the fit precision and forecast precision of the models are much higher, the cycles are obviously different under different working conditions, and the forecast result of the frequency sequence model is better than that of the time sequence model. Combining dynamic grey model and auto-manufacturing case the controlling and information subsystems of verification cycle and the lifecycle based on information integration, multi-sensor controlling and management controlling were given. The models can be used in production process to help enterprise reduce error, cost and flaw.

LIFECYCLE SAFETY GUARANTEE OF STRUCTURES

The principles for lifecycle safety guarantee of engineering structures areproposed, and the conception is developed for developing the safety guarantee system by integratingthe monitoring system, analysis system and maintenance system together on the basis of multi-sensor,distribution-measurement, data fusion and digital-signal-processor (DSP) technologies as well asthree-dimensional (3D) fatigue fracture unified theory. As all the systems should work in situs andin real-time, micromation and integration are important. Damage detectability is introduced toclarify the relationship of life prediction and healthy monitoring or faulty diagnosis. The researchwork to realize the lifecycle safety guarantee system is summarized and perspectives for futureefforts are outlined.

A Novel Lifecycle Model for Web-based Application Development in Small and Medium Enterprises

Software engineering＇s lifecycle models havc proven to be very important for traditional software development. However, can these models be applied to the development of Web-based applications as well？ In recent years, Web-based applications have become more and more complicated and a lot of efforts have been placed on introducing new technologies such as J2EE, PhP, and .NET, etc., which have been universally accepted as the development technologies for Web-based applications. However, there is no universally accepted process model for the development of Web-based applications. Moreover, shaping the process model for small medium-sized enterprises （SMEs）, which have limited resources, has been relatively neglected. Based on our previous work, this paper presents an expanded lifecycle process model for the development of Web-based applications in SMEs. It consists of three sets of processes, i.e., requirement processes, development processes, and evolution processes. Particularly, the post-delivery evolution processes are important to SMEs to develop and maintain quality web applications with limited resources and time.

Strategy Approach towards Product Lifecycle Management

Mass Customization and global economic collaboration drives the product development and management beyond internal enterprise to cover the whole product value chain. To meet such requirement, a strategy approach focusing on data organization for product lifecycle management was promoted. The approach takes product platform as the base, view engine and rule-based access as data access mechanism, and integration and collaboration bus as a enabler to allow participants involved in product lifecycle to get convenient, WEB-based access to the internal and external content, applications, and services.

On the Design of Effective E-Commerce Applications: An ISO-Based Lifecycle Model

The provision of services as e-commodities and the wide use of networked business models have driven buyer experience to new heights. Innovation, coupled with quality is the competitive advantage e-commerce vendors strive to achieve when designing or re-designing their software. In terms of quality, evaluation stood in the spotlight for many years. However, software analysis and design based on quality models have been used mostly for understanding, rather than improving. In this work, we present a new model for the analysis and design of e-commerce software systems mapped to the software life-cycle process. Quality control procedures are mapped to every phase, from initiation and design to delivery. Based on current ISO standards such as ISO25000 series, this work discusses technical and managerial principles that need to be applied in order to obtain quality e-commerce software.

Overview of the Analytical Lifecycle of Supercritical Fluid Chromatography Methods

In recent times, the overall interest over Supercritical Fluid Chromatography (SFC) is truly growing within various domains but especially for pharmaceutical analysis. However, in the best of our knowledge modern SFC is not yet applied for drug quality control in the daily routine framework. Among the numerous reported SFC methods, none of them could be found to fully satisfy to all steps of the analytical method lifecycle. Thereby, the present contribution aims to provide an overview of the current and past achievements related to SFC techniques, with a targeted attention to this lifecycle and its successive steps. The included discussions were therefore structured accordingly and emphasizing the analytical method lifecycle in accord with the International Conference on Harmonisation (ICH). Recent and important scientific outputs in the field of analytical SFC, as well as instrumental evolution, qualification strategies, method development methodologies and discussions on the topic of method validation are reviewed.

Research on Lifecycle-Oriented Open Framework of Fault Diagnosis for Equipment System

Based on the analysis of the whole lifecycle of equipment, we, in this paper, propose the lifecycle-oriented diagnosis and maintenance philosophy, and expound its connotation and characteristics. Then, we present its open framework of the lifecycle-oriented diagnosis view in detail, which consists of three levels： information model, net model and open space. The open space level indicates the alternation of the information, the integration of the structure and the modeling of the knowledge. These three levels reveal the synthesis of the diagnosis process effectively in length and breadth. Finally, the main work of the paper and the future work on this problem are discussed.

Research on the Assessment Strategies for the Product Multi-lifecycle System

In this paper, the assessment indicator hierarchy of the Product Multi-Lifecycle System (PMLS) is proposed based on the PMLS connotations and objectives, upon which the PMLS assessment method is discussed and the example is presented by using the fuzzy judging theory.

Study on Product Lifecycle Dynamic Information Modeling and Its Application

The PLDIM (Product Lifecycle Dynamic Information Model) is the most important part of the PLDM (Product Lifecycle Dynamic Model ) and it is the basis to create the information system and to implement PLM (Product Lifecycle Management). The information classification, the relationships among all information items, PLDIM mathematic expression, information coding and the 3D synthetic description of the PLDIM are presented. The information flow and information system structure based on the two information centers and Internet/Intranet are proposed, and how to implement this system for ship diesel engines are also introduced according to the PLDIM and PLM solutions.

Organizational evolution of project management teams over the whole lifecycle of megaprojects:Case study of the Hong Kong-Zhuhai-Macao Bridge

Project management teams are critical in the implementation of megaprojects,but their evolution throughout the project lifecycle has not been clearly explained.This paper explores the organizational evolution of megaproject management teams through a longitudinal retrospective case study of the Hong Kong–Zhuhai–Macao Bridge(HZMB)project.The organizational evolution is examined in terms of management objectives,management content,and organizational structure.The organizational evolution of the HZMB project management team exhibits stage differentiation with the coexistence of turbulence and stability.Changes in the external environment are the driving force for organizational evolution,whereas a flexible organizational strategy is critical in promoting this evolution.Basing on the HZMB case study,this paper summarizes six critical measures that facilitate the organizational evolution of megaproject management teams.Our findings add value to megaproject management theory and provide a better understanding of the dynamics and complexity of megaproject organizational management.

Lifecycle carbon footprint and cost assessment for coal-to-liquid coupled with carbon capture,storage,and utilization technology in China

Thecoal-to-liquidcoupledwithcarbon capture,utilization,and storage technology has the potential to reduce CO_(2)emissions,but its carbon footprint and cost assessment are still insufficient.In this paper,coal mining to oil production is taken as a life cycle to evaluate the carbon footprint and levelized costs of direct-coal-toliquid and indirect-coal-to-liquid coupled with the carbon capture utilization and storage technology under three scenarios:non capture,process capture,process and public capture throughout the life cycle.The results show that,first,the coupling carbon capture utilization and storage technology can reduce CO_(2)footprint by 28%-57%from 5.91 t CO_(2)/t:oil of direct-coal-to-liquid and 24%-49%from 7.10 t CO_(2)/t:oil of indirect-coal-to-liquid.Next,the levelized cost of direct-coal-to-liquid is 648-1027$/t of oil,whereas that of indirect-coal-to-liquid is 653-1065$/t of oil.When coupled with the carbon capture utilization and storage technology,the levelized cost of direct-coalto-liquid is 285-1364$/t of oil,compared to 1101-9793/t of oil for indirect-coal-to-liquid.Finally,sensitivity analysis shows that CO_(2)transportation distance has the greatest impact on carbon footprint,while coal price and initial investment cost significantly affect the levelized cost ofcoal-to-liquid.

The Construction of an Intrauterine Diagnosis and Treatment System and Comprehensive Lifecycle Health Service of Congenital Heart Disease:Xinhua Hospital Model

With the growing influence of slow population growth and population aging,China has established the birth policy and issued a series of documents to promote maternal and fetal health and improve the birth rate.With the increase in prevalence of birth defects,timely diagnosis and intervention in utero provide possibilities to reduce unnecessary abortions and offer better prognosis.Congenital heart disease(CHD),as one of the most common congenital birth defects,is the leading cause of mortality in patients aged<5 years,and brings a heavy burden to both the affected families and society.Fetuses with CHD are associated with an increased risk of pregnancy-related complications and premature birth,and children with CHD typically face growth and developmental problems even after the correction of malformation.Therefore,management including diagnosis,treatment,and rehabilitation throughout the fetal period into childhood and even adulthood is essential for children with CHD.Based on the rapid advances in intrauterine and perinatal medicine and an in-depth collaboration among obstetrics and pediatrics,a novel diagnosis and treatment system has been established for the management of CHD in the past 2 decades in Shanghai Xinhua Hospital.This Intrauterine Diagnosis and Treatment System and Comprehensive Lifecycle Health Service of Congenital Heart Disease model provides prenatal diagnosis,intrauterine intervention,delivery room service and neonatal therapies,and postintrauterine rehabilitation for children with CHD.We have developed a four-dimensional spatiotemporal image correlation echocardiography and a three-dimensional cardiac virtual endoscopy system for the intrauterine diagnosis of CHD,dramatically raising the diagnostic utility.Our innovative and independent newborn-intervention technique has effectively reduced the re-intervention rate in patients with pulmonary atresia with intact ventricular septum and critical pulmonary stenosis.In 2018,Xinhua Hospital independently performed the case of fetal aortic valvuloplasty in Asia through a multidepartment collaborative effort.All children treated in this system achieved biventricular circulation and a better long-term postoperative outcome.We also have conducted postoperative rehabilitation therapy to promote the development and health of children with CHD.The practice of Xinhua model has reduced unnecessary abortion of CHD fetuses,reduced the mortality rate associated with critical CHD,and improved the mid-and long-term prognosis in CHD,which is essential to promote the fertility level and children’s health.Furthermore,translational medicine platform and the birth cohort Early Life Plan was constructed to explore the origins of major developmental diseases and establish an early intervention model in CHD.This practice of assessment of the intrauterine system has been expanded to other congenital defects in Xinhua Hospital,and sequential treatment of more than 2,000 cases has been completed to date.Based on practice in intrauterine management of CHD and other diseases,the concept of Intrauterine Pediatrics was proposed as a first to emphasize early prevention and intervention of childhood diseases and promote a comprehensive lifecycle service for children.The development and evolution of this system requires further attention not only from researchers but also from the government and global medical communities.

A Fractionated Spacecraft System Assessment Tool Based on Lifecycle Simulation Under Uncertainty

To comprehensively assess fi＇actionated spacecraft, an assessment tool is developed based on lifecycle simulation under uncertainty driven by modular evolutionary stochastic models. First, fractionated spacecraft nomenclature and architecture are clarified, and assessment criteria are analyzed. The mean and standard deviation of risk adjusted lifecycle cost and net present value （NPV） are defined as assessment metrics. Second, fractionated spacecraft sizing models are briefly described, followed by detailed discussion on risk adjusted lifecycle cost and NPV models. Third, uncertainty sources over fractionated spacecraft life- cycle are analyzed and modeled with probability theory. Then the chronological lifecycle simulation process is expounded, and simulation modules are developed with object oriented methodology to build up the assessment tool. The preceding uncertainty models are integrated in these simulation modules, hence the random object status can be simulated and evolve with lifecycle timeline. A case study to investigate the fractionated spacecraft for a hypothetical earth observation mission is carried out with the proposed assessment tool, and the results show that fractionation degree and launch manifest have great influence on cost and NPV, and generally fractionated spacecraft is more advanced than its monolithic counterpart under uncertainty effect. Finally, some conclusions are given and future research topics are highlighted.

Exploring the Applications of Digital Twin Technology in Enhancing Sustainability in Civil Engineering:A Review

With the advent of the big data era and the rise of Industrial Revolution 4.0,digital twins(DTs)have gained sig-nificant attention in various industries.DTs offer the opportunity to combine the physical and digital worlds and aid the digital transformation of the civil engineering industry.In this paper,605 documents obtained from the search werefirst analysed using CiteSpace for literature visualisation,and an author co-occurrence network,a keyword co-occurrence network,and a keyword clustering set were obtained.Next,through a literature review of 86 papers,this paper summarises the current status of DT application in civil engineering based on a review of the origins,concepts,and implementation techniques of DTs,and it introduces the application of DTs in the full project lifecycle.This study shows that DTs have great potential to address many of the challenges faced by civil engineering.In this regard,the paper also presents some thoughts on the future directions of DT research.

ERAD: Enhanced Ransomware Attack Defense System for Healthcare Organizations

Digital integration within healthcare systems exacerbates their vulnerability to sophisticated ransomware threats, leading to severe operational disruptions and data breaches. Current defenses are typically categorized into active and passive measures that struggle to achieve comprehensive threat mitigation and often lack real-time response effectiveness. This paper presents an innovative ransomware defense system, ERAD, designed for healthcare environments that apply the MITRE ATT&CK Matrix to coordinate dynamic, stage-specific countermeasures throughout the ransomware attack lifecycle. By systematically identifying and addressing threats based on indicators of compromise (IOCs), the proposed system proactively disrupts the attack chain before serious damage occurs. Validation is provided through a detailed analysis of a system deployment against LockBit 3.0 ransomware, illustrating significant enhancements in mitigating the impact of the attack, reducing the cost of recovery, and strengthening the cybersecurity framework of healthcare organizations, but also applicable to other non-health sectors of the business world.

Cloud Virtual Machine Lifecycle Security Framework Based on Trusted Computing

As a foundation component of cloud computing platforms, Virtual Machines (VMs) are confronted with numerous security threats. However, existing solutions tend to focus on solving threats in a specific state of the VM. In this paper, we propose a novel VM lifecycle security protection framework based on trusted computing to solve the security threats to VMs throughout their entire lifecycle. Specifically, a concept of the VM lifecycle is presented divided up by the different active conditions of the VM. Then, a trusted computing based security protecti on framework is developed, which can exte nd the trusted relati on ship from trusted platform module to the VM and protect the security and reliability of the VM throughout its lifecycle. The theoretical analysis shows that our proposed framework can provide comprehensive safety to VM in all of its states. Furthermore, experiment results demonstrate that the proposed framework is feasible and achieves a higher level of security compared with some state-of-the-art schemes.

Information security assurance lifecycle research

This article proposes that problems of information security are mainly caused by the ineffective integration of people, operation, and technology, and not merely by the poor use of technology. Based on the information lifecycle, a model of the information security assurance lifecycle is presented. The crucial parts of the model are further discussed, with the information risk value and protect level, and the solution in each step of the lifecycle is presented with an ensured information risk level, in term of the integration of people, operation, and technology.

Building a Holistic Taxonomy Model for OGD-Related Risks:Based on a Lifecycle Analysis

For many government departments,uncertainty aversion is a source of barriers in the advancement of data openness.A more active response to potential risks is needed and necessitates an in-depth examination of risks related to open government data(OGD).With a cross-case study in which three cases from the United Kingdom,the United States and China are examined,this study identifies potential risks that might emerge at different stages of the lifecycle of OGD programs and constructs a taxonomy model for them.The taxonomy model distinguishes the“risks from OGD”from the“risks to OGD”,which can help government departments make better responses.Finally,risk response strategies are suggested based on the research results.

Evaluation of the environmental impact of the urban energy lifecycle based on lifecycle assessment

Energy resources have environmental impact through their entire lifecycle. The evaluation of the environmental impacts of the energy lifecycle can contribute to decision making regarding energy manage- ment. In this paper, the lifecycle assessment （LCA） method is introduced to calculate the environmental impact loads of different types of energy resources （including coal, oil, natural gas, and electricity） used in urban regions. The scope of LCA includes the production, transportation, and consumption processes. The pollutant emission inventory is listed, and the environmental impact loads are acquired through the calculation of environmental impact potentials, normalization, and weighted assessment. The evaluation method is applied to Beijing, China, revealing that photochemical oxidant formation and acidification are the primary impact factors in the lifecycle of all energy resources and that the total environmental impact load increased steadily from 132.69 million person equivalents （PE） in 1996 to 208.97 million PE in 2010. Among the energy types, coal contributes most to the environmental impact, while the impacts caused by oil, natural gas, and electricity have been growing. The evaluation of the environmental impact of the urban energy lifecycle is useful for regulating energy structures and reducing pollution, which could help achieve sustainable energetic and environmental development.

Size effect and growth options over firm lifecycle

The size effect can be attributed to the relative importance of growth options versus assets-in-place in total assets.By incorporating the changing trend of growth options over firm lifecycle into the dynamic investment model developed by Berk et al.(1999)。this paper demonstrates that the gradual exhausting or exercising of growth options would cause a downward pattern of size effect over firm lifecycle,while new growth options created by R&D or innovative investments can intensify size effect.Using a sample of listed firms in USA stock market during the period of 1963-2018,both cross-sectional evidence on individual stocks and time-series evidence on portfolios analysis support theoretical preditions well,and empirical findings are robust for different methodologies,different measures of the exerci sing/creating of growth options,and for China's stock market.