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Article
Publication date: 1 November 2022

Shuang Han, Jing Zhang, Quanyue Yang, Zijian Yuan, Shubin Li, Fengying Cui, Chuntang Zhang and Tao Wang

The performance of the classical car-following system is easily affected by external disturbances. To enhance the performance of the classical car-following model under sudden…

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Abstract

Purpose

The performance of the classical car-following system is easily affected by external disturbances. To enhance the performance of the classical car-following model under sudden external disturbances, a novel car-following model is established to smooth traffic flow.

Design/methodology/approach

This paper proposed a Proportion Integration Differentiation (PID) control strategy based on classical control theory and developed a novel car-following model. The linear system theory and Laplace transform are used to derive a closed-loop transfer function. Then, the stability condition is obtained by using the Routh stability criterion and the small gain theorem. Finally, the validity and feasibility of the PID control strategy is proved by numerical simulations.

Findings

The analytic results and the numerical simulation results show that both the integration part and the differential part have the positive effect to suppress traffic oscillation efficiently; the collaboration of these two parts has more power to improve the stability of traffic flow. It means that the proposed model integrated with the PID control strategy has the ability of anti-interference and smooth traffic compared with the classical car-following model.

Originality/value

This paper introduces the PID control strategy into the classical car-following system, which enhances the stability of the system and also provides an efficient method for optimizing the traffic flow system.

Details

Engineering Computations, vol. 39 no. 10
Type: Research Article
ISSN: 0264-4401

Keywords

Available. Open Access. Open Access
Article
Publication date: 7 June 2021

Xudong He, GuangYi Yang, E. Yang, Moli Zhang, Dan Luo, Jingjian Liu, Chongnan Zhao, Qinhua Chen and Fengying Ran

Based on DNase I and reduced graphene oxide (rGO)-magnetic silicon microspheres (MNPS), a highly sensitive and selective fluorescent probe for the detection of PD-L1 was developed.

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Abstract

Purpose

Based on DNase I and reduced graphene oxide (rGO)-magnetic silicon microspheres (MNPS), a highly sensitive and selective fluorescent probe for the detection of PD-L1 was developed.

Design/methodology/approach

Here °C we present a feasibility of biosensor to detection of PD-L1 in lung tumors plasma. In the absence of PD-L1°C the PD-L1 aptamer is absorbed on the surface of graphene oxide modified magnetic nanoparticles °8rGO-MNPS°9 and leading to effective fluorescence quenching. Upon adding PD-L1°C the aptamer sequences could be specifically recognized by PD-L1 and the aptamer/PD-L1 complex is formed°C resulting in the recovery of quenched fluorescence.

Findings

This sensor can detect PD-L1 with a linear range from 100 pg mL−1 to 100 ng mL−1, and a detection limit of 10 pg•m−1 was achieved.

Originality/value

This method provides an easy and sensitive method for the detection of PD-L1 and will be beneficial to the early diagnosis and prognosis of tumors.

Details

Sensor Review, vol. 41 no. 3
Type: Research Article
ISSN: 0260-2288

Keywords

Available. Open Access. Open Access
Article
Publication date: 7 November 2024

Wei Jian Wang

In this study, suggestions on the protection and development of marine resources, sea area use and management, improvement of laws and regulations, monitoring of marine resources…

94

Abstract

Purpose

In this study, suggestions on the protection and development of marine resources, sea area use and management, improvement of laws and regulations, monitoring of marine resources and impact assessment of marine environment are put forward.

Design/methodology/approach

Literature research method.

Findings

A major factor contributing to the decline in fishery resources is excessive fishing. At present, there are many problems to be solved in the exploitation and utilization of marine mineral resources in China. The pollution problem of marine tourism resources is becoming increasingly serious. Overmining of coastal sea resources has led to planning and management failures.

Originality/value

This paper discusses the current situation of marine resource exploitation and protection in China and analyzes the reasons for excessive resource exploitation from three aspects of marine concept, laws and regulations and marine management.

Details

Marine Economics and Management, vol. 7 no. 2
Type: Research Article
ISSN: 2516-158X

Keywords

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Article
Publication date: 23 October 2024

Marina Padovan, Gaston Ares, Tailane Scapin, Mariana Vieira dos Santos Kraemer, Maria Cecília Cury Chaddad, Ana Carolina Fernandes, Greyce Luci Bernardo, Paula Lazzarin Uggioni, Simone Pettigrew and Rossana Pacheco da Costa Proença

The World Health Organization recommends limiting the intake of free sugars, which can be added to packaged foods and may appear on labels under different terms. The aim of this…

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Abstract

Purpose

The World Health Organization recommends limiting the intake of free sugars, which can be added to packaged foods and may appear on labels under different terms. The aim of this research was to analyse the evidence related to the declaration of free sugars from fruits on packaged food labels.

Design/methodology/approach

A scoping review was conducted following the recommendations of the Joanna Briggs Institute (JBI).

Findings

Ten eligible studies, conducted in seven countries, were included in this review. The percentage of packaged foods in which free sugars were identified ranged from 52.5 to 86.5%. In three studies, terms related to sugars were identified inductively by reading the entire ingredient list, whereas in the other studies sugars were identified by searching for a list of predefined terms. Studies differed in the definition of sugars and the terms used to identify them. Nine studies included fruit sugars within the terms used to identify free sugars. However, they lacked consistency in the types of fruit sugars considered and did not discuss their agreement with the adopted definitions of sugars.

Originality/value

As far as can be ascertained, this is the first review that addresses the declaration of free sugars from fruits on packaged food labels. Overall, there is a scarcity of literature focused on identifying and discussing the range of free sugars from fruits declared on food labels.

Details

British Food Journal, vol. 126 no. 12
Type: Research Article
ISSN: 0007-070X

Keywords

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