In order to improve the safety protection performance of the rehabilitation robot,an active safety protection method is proposed in the rehabilitation scene.The oxyhemoglobin concentration information and RGB-D inform...In order to improve the safety protection performance of the rehabilitation robot,an active safety protection method is proposed in the rehabilitation scene.The oxyhemoglobin concentration information and RGB-D information are combined in this method,which aims to realize the comprehensive monitoring of the invasion target,the patient’s brain function movement state,and the joint angle in the rehabilitation scene.The main focus is to study the fusion method of the oxyhemoglobin concentration information and RGB-D information in the rehabilitation scene.Frequency analysis of brain functional connectivity coefficient was used to distinguish the basic motion states.The human skeleton recognition algorithm was used to realize the angle monitoring of the upper limb joint combined with the depth information.Compared with speed and separation monitoring,the protection method of multi-information fusion is safer and more comprehensive for stroke patients.By building the active safety protection platform of the upper limb rehabilitation robot,the performance of the system in different safety states is tested,and the safety protection performance of the method in the upper limb rehabilitation scene is verified.展开更多
In recent years, with the rapid development of social economy and the increasing demand for people's travel, traffic engineering as the guarantee of people's travel infrastructure engineering, has made unprece...In recent years, with the rapid development of social economy and the increasing demand for people's travel, traffic engineering as the guarantee of people's travel infrastructure engineering, has made unprecedented progress. In the construction of traffic engineering, the protective structure is an indispensable part, which plays an important role in ensuring traffic safety. The construction process determines the quality of the project and directly affects the overall function of the project. Based on this, this paper analyzes the protection facilities of traffic safety, and deeply discusses the construction technology of traffic protection facilities, providing reference for similar projects.展开更多
As a power infrastructure directly facing power users, transmission line is the direct power source of end users. Therefore, the normal operation of transmission line is a key link to ensure high-quality power supply ...As a power infrastructure directly facing power users, transmission line is the direct power source of end users. Therefore, the normal operation of transmission line is a key link to ensure high-quality power supply service. Due to the wide range of transmission line erection, the erection site is mainly in urban areas with complex environment, and the insulation level is lower than the transmission network, resulting in high failure rate, heavy maintenance workload and more power outages caused by maintenance. In order to ensure the reliability demand of users, improve the satisfaction of users, and reduce the power failure caused by maintenance and fault, live working technology is proposed and applied to practical production. Live working is a kind of operation mode for inspection and maintenance under the condition of keeping all equipment of power grid without power failure. At present, most of the maintenance work and accident handling work in the transmission line can be completed under the condition of live operation. Therefore, the implementation of live operation can significantly reduce the power outage duration and power outage times of users and improve the reliability of power supply.展开更多
As far as road engineering projects are concerned, the construction content includes not only the pavement construction, but also the configuration of road safety protection equipment. For example, isolation equipment...As far as road engineering projects are concerned, the construction content includes not only the pavement construction, but also the configuration of road safety protection equipment. For example, isolation equipment, road safety signs or guardrails, etc. Safety protection equipment is including the above facilities, largely determines the safety of transportation or pedestrian travel. In the past few years, China's society and economy have developed at a high speed, and the traffic and transportation fields have been quite different from those before. From the macroscopic point of view, the author analyzes the present situation of China's traffic safety protection engineering in detail, finds out the existing problems, and designs targeted solutions on this basis, so as to serve as a reference for similar research and safety protection engineering practice.展开更多
The pedestrian protection technology must be used in automotive design if China-made automotives want to compete and grow strong in the world in the future. In this paper, a CAE simulation analysis is made for a domes...The pedestrian protection technology must be used in automotive design if China-made automotives want to compete and grow strong in the world in the future. In this paper, a CAE simulation analysis is made for a domestic sedan car hood to check whether it meet the pedestrian safety protection laws and regulations. Results show that the original car cannot meet the demands of the rules. In order to meet the standards of the pedustrian protection rules, the car hood should undergo structural improvements. Tested again by CAE simulation analysis, the car after a series of improved design can reached the 3-star class EuroNCAP（ Euro New Car Assessment Program）standard of the car pedestrian safety protection laws and regulations.展开更多
A conservative estimation reveals that buildings consume∼30%of global energy and emit nearly 15%of direct CO_(2)on Earth,demonstrating the significant potential for improving building energy efficiency[1,2].Depending...A conservative estimation reveals that buildings consume∼30%of global energy and emit nearly 15%of direct CO_(2)on Earth,demonstrating the significant potential for improving building energy efficiency[1,2].Depending on the Seebeck effect,thermoelectric(TE)materials and devices can directly convert heat into electricity[3,4],and enable efficient waste-heat collection,temperature sensing,and high-temperature/fire detection in TE intelligent buildings,thereby facilitating energy harvesting and safety protection(Fig.1a).展开更多
Incorporation of biomolecular epitopes to malarial antigens should be explored in the development of straintranscending malarial vaccines.The present study sought to determine safety,immunogenicity and cross-species e...Incorporation of biomolecular epitopes to malarial antigens should be explored in the development of straintranscending malarial vaccines.The present study sought to determine safety,immunogenicity and cross-species efficacy of Plasmodium falciparum serine repeat antigen 5 polypeptide co-expressed with epitopes of BacilleCalmette Guerin（BCG）,tetanus toxoid（TT） and a chemokine gene.Olive baboons and BALB/c mice were randomly assigned into vaccine and control groups.The vaccine group animals were primed and boosted twice with pIRES plasmids encoding the SERA5 ＋ BCG ＋ TT alone,or with either CCL5 or CCL20 and the control group with pIRES plasmid vector backbone.Mice and baboons were challenged with P.berghei ANKA and P.knowlesi H strain parasites,respectively.Safety was determined by observing for injection sites reactogenicities,hematology and clinical chemistry.Parasitaemia and survivorship profiles were used to determine cross-species efficacy,and T cell phenotypes,Th1-,Th2-type,T-regulatory immune responses and antibody responses were assessed to determine vaccine immunogenicity.The pSeBCGTT plasmid DNA vaccines were safe and induced Thl-,Th2-type,and Tregulatory responses vaccinated animals showed enhanced CD4~＋（P〈0.01）,CD 8~＋ T cells（P〈 0.001） activation and IgG anti-SE36 antibodies responses（P〈 0.001） at week 4 and 8 post vaccination compared to the control group.Vaccinated mice had a 31.45-68.69%cumulative parasite load reduction and 60%suppression in baboons（P〈0.05）and enhanced survivorship（P〈 0.001） with no clinical signs of malaria compared to the control group.The results showed that the vaccines were safe,immunogenic and conferred partial cross-species protection.展开更多
Nowadays, the social economy is developing rapidly, and all walks of life in our country are racing to develop, especially the oil industry. In the process of human survival and development, the most indispensable is ...Nowadays, the social economy is developing rapidly, and all walks of life in our country are racing to develop, especially the oil industry. In the process of human survival and development, the most indispensable is oil resources. From the perspective of relevant enterprises, if we want to achieve sustainable development, we must do a good job in the safety and environmental protection management of oil fields. Only when we have sufficient awareness of environmental protection can we better implement relevant measures.展开更多
The ecological environmental safety of health resorts can prevent premature depletion of medical natural resources and avoid being polluted.In CNKI,Wanfang Database,Google Academic,Web of Science,and Pub Med database,...The ecological environmental safety of health resorts can prevent premature depletion of medical natural resources and avoid being polluted.In CNKI,Wanfang Database,Google Academic,Web of Science,and Pub Med database,Chinese search terms“health resort”,“convalescence”,“ecological environment”,“ecological safety protection”,“evaluation”,as well as English search terms“health resort”,“convalescence”,“ecological environment”,“ecological safety and security”,and“estimation”were searched,and a total of 33 articles were screened.The basic information of the 33 articles was recorded,and the types of evaluation models,evaluation indicators and indicator thresholds were summarized.The future development direction was proposed,and the enlightenment to the management and protection of health resorts was summarized.展开更多
Because subway projects cannot control and protect driving, they mainly rely on the experience of the occupants in the field of maneuvering. Visual cues and t.d. are prone to accidents. To this end, we have developed ...Because subway projects cannot control and protect driving, they mainly rely on the experience of the occupants in the field of maneuvering. Visual cues and t.d. are prone to accidents. To this end, we have developed an intelligent safety monitoring system (ISM) suitable for subway construction machinery. The ISM system consists of four parts: work monitoring subsystem, video subsystem, positioning subsystem and terrestrial radio communication subsystem. Each ISM subsystem of the subway engineering locomotive system, the function of equipment design and operation protection equipment, the relevance and working principle of each ISM subsystem are introduced in detail. The ISM system has the technical characteristics of high integration, high resource utilization, high reliability, knowledge connection and information collaboration. The ISM system is tested on the basis of two vehicles on Shanghai metro line 13, and the system meets the requirements of protection and surveillance.展开更多
With the continuous development of national economy, the construction of engineering projects in China is also developing rapidly, which makes the safety protection management of construction projects more and more st...With the continuous development of national economy, the construction of engineering projects in China is also developing rapidly, which makes the safety protection management of construction projects more and more stringent. Only such construction project safety protection and management of all aspects of good, constantly summarize the building safety protection and management, strive to explore the experience of building safety. New methods and technologies of protection management can reduce the occurrence of unsafe accidents in construction and protect the lives and property of construction personnel. The safety protection of construction equipment is not only the basic guarantee for the development of construction enterprises, but also the premise for the efficient completion of construction projects. In short, only in this way in the construction safety protection management of a good job, can effectively ensure the construction project quality progress, construction enterprises stable and rapid development, promote the rapid development of the national economy. This research is divided into four main parts: the first part is an overview of the safety protection management theory in the construction process;the second part is the analysis of the current situation of safety protection management in the process of domestic construction;the third part is the detailed analysis of the problems existing in the construction safety protection management in our country;the fourth part is how to improve the safety protection management in the construction process. The countermeasures of strengthening construction safety protection management are summarized in the paper.展开更多
In order to ensure the safety of buildings,equipment,personnel,property and production,to prevent or mitigate the disasters caused by lightning and static electricity,and to avoid the occurrence of serious lightning a...In order to ensure the safety of buildings,equipment,personnel,property and production,to prevent or mitigate the disasters caused by lightning and static electricity,and to avoid the occurrence of serious lightning accidents,lightning protection inspection(acceptance)is of great significance.At present,in the process of inspection(acceptance)of lightning protection devices,there are following problems:professional and technical equipment for inspection is various and with different performances;the market demand for lightning-proof safety inspection is large,and entrusted units are increasing;the inspection process is difficult to be accurately obtained anytime and anywhere.Therefore,it is proposed to adopt technology of mobile application,wireless network transmission and computer software development to design and develop a data management system for lightning protection inspection based on Android,so as to realize the functions like real-time and comprehensive information management of professional lightning-proof inspection devices and entrusted units and establishment of electronic files for lightning-proof inspection of all projects.展开更多
Starting with the goal and significance of software security testing,this paper introduces the main methods of software security testing in the open network environment,including formal security testing,white box test...Starting with the goal and significance of software security testing,this paper introduces the main methods of software security testing in the open network environment,including formal security testing,white box testing,fuzzy testing,model testing,and fault injection testing.A software security testing method based on a security target model is proposed.This paper provides new ideas for software security testing,better adapts to the open network environment,improves the efficiency and quality of testing,and builds a good software application environment.展开更多
In order to prepare the shielding fabrics with high efficiency of power frequency(PF)shielding and excellent electrical conductivity,different ratios of aramid/stainless steel fiber blended yarns were used to weave th...In order to prepare the shielding fabrics with high efficiency of power frequency(PF)shielding and excellent electrical conductivity,different ratios of aramid/stainless steel fiber blended yarns were used to weave the shielding fabrics with different specifications.The fabric structure,fabric areal density,number of fabric layers,embedding ratio of copper-clad wires wrapped aramid yarns(denoted as CCWWA)and embedding direction were designed,and a total of 34 different types of shielding fabrics were woven for testing.The experiments were mainly conducted to study the influence mechanism of various factors on the PF shielding effectiveness by testing the electrical conductivity and PF shielding effectiveness of the fabrics.The research results indicate that the PF shielding effectiveness improves with increasing fabric areal density and metal fiber content.The fabrics embedded with CCWWA,particularly those with bidirectional embedding,exhibit a significant enhancement in the PF shielding effectiveness,showing an increase of 8-20 dB compared to the fabrics without CCWWA.The PF shielding effectiveness varies across different fabric structures,with plain weave fabrics demonstrating the superior PF shielding effectiveness due to their compact structure.Non-conductive base fabric has minimal impact on the PF shielding effectiveness.As the number of fabric layers increases,the PF shielding effectiveness initially improves but then declines,peaking with double-layer fabrics.展开更多
In this paper, a disturbance observer-based safe tracking control scheme is proposed for a medium-scale unmanned helicopter with rotor flapping dynamics in the presence of partial state constraints and unknown externa...In this paper, a disturbance observer-based safe tracking control scheme is proposed for a medium-scale unmanned helicopter with rotor flapping dynamics in the presence of partial state constraints and unknown external disturbances. A safety protection algorithm is proposed to keep the constrained states within the given safe-set. A second-order disturbance observer technique is utilized to estimate the external disturbances. It is shown that the desired tracking performance of the controlled unmanned helicopter can be achieved with the application of the backstepping approach, dynamic surface control technique, and Lyapunov method. Finally, the availability of the proposed control scheme has been shown by simulation results.展开更多
The increasing use of the Internet with vehicles has made travel more convenient.However,hackers can attack intelligent vehicles through various technical loopholes,resulting in a range of security issues.Due to these...The increasing use of the Internet with vehicles has made travel more convenient.However,hackers can attack intelligent vehicles through various technical loopholes,resulting in a range of security issues.Due to these security issues,the safety protection technology of the in-vehicle system has become a focus of research.Using the advanced autoencoder network and recurrent neural network in deep learning,we investigated the intrusion detection system based on the in-vehicle system.We combined two algorithms to realize the efficient learning of the vehicle’s boundary behavior and the detection of intrusive behavior.In order to verify the accuracy and efficiency of the proposed model,it was evaluated using real vehicle data.The experimental results show that the combination of the two technologies can effectively and accurately identify abnormal boundary behavior.The parameters of the model are self-iteratively updated using the time-based back propagation algorithm.We verified that the model proposed in this study can reach a nearly 96%accurate detection rate.展开更多
Programmable Logic Controllers(PLC),core of industrial control systems,is widely used in industrial control systems.The security of PLC is the key to the security of industrial control systems.Nowadays,a large number ...Programmable Logic Controllers(PLC),core of industrial control systems,is widely used in industrial control systems.The security of PLC is the key to the security of industrial control systems.Nowadays,a large number of industrial control systems are connected to the Internet which exposes the PLC equipment to the Internet,and thus raising security concerns.First of all,we introduce the basic principle of PLC in this paper.Then we analyze the PLC code security,firmware security,network security,virus vulnerability and Modbus communication protocol by reviewing the previous related work.Finally,we make a summary of the current security protection methods.展开更多
Aiming at the problem that virtual machine information cannot be extracted incompletely, we extend the typical information extraction model of virtual machine and propose a perception mechanism in virtualization syste...Aiming at the problem that virtual machine information cannot be extracted incompletely, we extend the typical information extraction model of virtual machine and propose a perception mechanism in virtualization system based on storage covert channel to overcome the affection of the semantic gap. Taking advantage of undetectability of the covert channel, a secure channel is established between vip and virtual machine monitor to pass data directly. The vip machine can pass the control information of malicious process to virtual machine monitor by using the VMCALL instruction and shared memory. By parsing critical information in process control structure, virtual machine monitor can terminate the malicious processes. The test results show that the proposed mechanism can clear the user-level malicious programs in the virtual machine effectively and covertly. Meanwhile, its performance overhead is about the same as that of other mainstream monitoring mode.展开更多
Objective: to analyze the occupational safety protection of the hospital hematology staff, construct the occupational exposure prevention system of hematology nurses, and strengthen the management of the prevention sy...Objective: to analyze the occupational safety protection of the hospital hematology staff, construct the occupational exposure prevention system of hematology nurses, and strengthen the management of the prevention system. Methods: the 100 hematology staffs working in our hospital from January 2018 to January 2020 were selected as observers for 6 months to observe the occupational safety protection awareness and protective measures of our hospital. Hospitals explore risk factors and targeted protective measures. Results: wrong hand washing method, wrong disinfectant application method, wrong medical waste classification treatment method, work clothes or hand washing, no report after injury, blood after injury: 3.00%, 3.00%, 3.00%, 10.00% / 6.00%, 70.00% and 6.00%.Conclusion: risk factors include: chemical reagents, biological reagents, noise, radiation, risk factors low level, need to pay attention to their protection, constantly learn more protection knowledge, hospital hematology staff has been in risk factors, need to use better protective measures for risk prevention.展开更多
Under the new situation of"integration of industrialization and industrialization"in China,security situational awareness is an important means to solve the problems of unclear boundaries,multiple roles and ...Under the new situation of"integration of industrialization and industrialization"in China,security situational awareness is an important means to solve the problems of unclear boundaries,multiple roles and complex business relationships of industrial Internet.The main contents of the platform include industrial data collection,industrial protocol identification,industrial asset detection and industrial threat monitoring.Among them,risk prevention and detection,key data protection,cloud platform and identification resolution node protection are all important issues.On the one hand,escorting the industrial Internet business needs to summarize the industrial Internet network security data and master the network security situation from the overall perspective.On the other hand,it is also necessary to establish an industrial Internet platform security early warning and emergency response process system,promote the security rectification of industrial platform enterprises,find the security threats and risks that have been hidden in the industrial Internet platform for a long time,and provide perception and decision⁃making support for enterprises.展开更多
基金the Interdisciplinary Program of Shanghai Jiao Tong University(No.YG2019QNA25)。
文摘In order to improve the safety protection performance of the rehabilitation robot,an active safety protection method is proposed in the rehabilitation scene.The oxyhemoglobin concentration information and RGB-D information are combined in this method,which aims to realize the comprehensive monitoring of the invasion target,the patient’s brain function movement state,and the joint angle in the rehabilitation scene.The main focus is to study the fusion method of the oxyhemoglobin concentration information and RGB-D information in the rehabilitation scene.Frequency analysis of brain functional connectivity coefficient was used to distinguish the basic motion states.The human skeleton recognition algorithm was used to realize the angle monitoring of the upper limb joint combined with the depth information.Compared with speed and separation monitoring,the protection method of multi-information fusion is safer and more comprehensive for stroke patients.By building the active safety protection platform of the upper limb rehabilitation robot,the performance of the system in different safety states is tested,and the safety protection performance of the method in the upper limb rehabilitation scene is verified.
文摘In recent years, with the rapid development of social economy and the increasing demand for people's travel, traffic engineering as the guarantee of people's travel infrastructure engineering, has made unprecedented progress. In the construction of traffic engineering, the protective structure is an indispensable part, which plays an important role in ensuring traffic safety. The construction process determines the quality of the project and directly affects the overall function of the project. Based on this, this paper analyzes the protection facilities of traffic safety, and deeply discusses the construction technology of traffic protection facilities, providing reference for similar projects.
文摘As a power infrastructure directly facing power users, transmission line is the direct power source of end users. Therefore, the normal operation of transmission line is a key link to ensure high-quality power supply service. Due to the wide range of transmission line erection, the erection site is mainly in urban areas with complex environment, and the insulation level is lower than the transmission network, resulting in high failure rate, heavy maintenance workload and more power outages caused by maintenance. In order to ensure the reliability demand of users, improve the satisfaction of users, and reduce the power failure caused by maintenance and fault, live working technology is proposed and applied to practical production. Live working is a kind of operation mode for inspection and maintenance under the condition of keeping all equipment of power grid without power failure. At present, most of the maintenance work and accident handling work in the transmission line can be completed under the condition of live operation. Therefore, the implementation of live operation can significantly reduce the power outage duration and power outage times of users and improve the reliability of power supply.
文摘As far as road engineering projects are concerned, the construction content includes not only the pavement construction, but also the configuration of road safety protection equipment. For example, isolation equipment, road safety signs or guardrails, etc. Safety protection equipment is including the above facilities, largely determines the safety of transportation or pedestrian travel. In the past few years, China's society and economy have developed at a high speed, and the traffic and transportation fields have been quite different from those before. From the macroscopic point of view, the author analyzes the present situation of China's traffic safety protection engineering in detail, finds out the existing problems, and designs targeted solutions on this basis, so as to serve as a reference for similar research and safety protection engineering practice.
文摘The pedestrian protection technology must be used in automotive design if China-made automotives want to compete and grow strong in the world in the future. In this paper, a CAE simulation analysis is made for a domestic sedan car hood to check whether it meet the pedestrian safety protection laws and regulations. Results show that the original car cannot meet the demands of the rules. In order to meet the standards of the pedustrian protection rules, the car hood should undergo structural improvements. Tested again by CAE simulation analysis, the car after a series of improved design can reached the 3-star class EuroNCAP（ Euro New Car Assessment Program）standard of the car pedestrian safety protection laws and regulations.
基金supported by the National Natural Science Foun-dation of China(52473277 and 52403100)the Graduate Student Research Program of Shenzhen University(868-000002020200)the Stable Support Project of Shenzhen(20231120171032001).
文摘A conservative estimation reveals that buildings consume∼30%of global energy and emit nearly 15%of direct CO_(2)on Earth,demonstrating the significant potential for improving building energy efficiency[1,2].Depending on the Seebeck effect,thermoelectric(TE)materials and devices can directly convert heat into electricity[3,4],and enable efficient waste-heat collection,temperature sensing,and high-temperature/fire detection in TE intelligent buildings,thereby facilitating energy harvesting and safety protection(Fig.1a).
基金Gene Art for engineering the vaccine constructs and the Uganda Council of Science and Technology (UCST)/World Bank for providing the funds for the work
文摘Incorporation of biomolecular epitopes to malarial antigens should be explored in the development of straintranscending malarial vaccines.The present study sought to determine safety,immunogenicity and cross-species efficacy of Plasmodium falciparum serine repeat antigen 5 polypeptide co-expressed with epitopes of BacilleCalmette Guerin（BCG）,tetanus toxoid（TT） and a chemokine gene.Olive baboons and BALB/c mice were randomly assigned into vaccine and control groups.The vaccine group animals were primed and boosted twice with pIRES plasmids encoding the SERA5 ＋ BCG ＋ TT alone,or with either CCL5 or CCL20 and the control group with pIRES plasmid vector backbone.Mice and baboons were challenged with P.berghei ANKA and P.knowlesi H strain parasites,respectively.Safety was determined by observing for injection sites reactogenicities,hematology and clinical chemistry.Parasitaemia and survivorship profiles were used to determine cross-species efficacy,and T cell phenotypes,Th1-,Th2-type,T-regulatory immune responses and antibody responses were assessed to determine vaccine immunogenicity.The pSeBCGTT plasmid DNA vaccines were safe and induced Thl-,Th2-type,and Tregulatory responses vaccinated animals showed enhanced CD4~＋（P〈0.01）,CD 8~＋ T cells（P〈 0.001） activation and IgG anti-SE36 antibodies responses（P〈 0.001） at week 4 and 8 post vaccination compared to the control group.Vaccinated mice had a 31.45-68.69%cumulative parasite load reduction and 60%suppression in baboons（P〈0.05）and enhanced survivorship（P〈 0.001） with no clinical signs of malaria compared to the control group.The results showed that the vaccines were safe,immunogenic and conferred partial cross-species protection.
文摘Nowadays, the social economy is developing rapidly, and all walks of life in our country are racing to develop, especially the oil industry. In the process of human survival and development, the most indispensable is oil resources. From the perspective of relevant enterprises, if we want to achieve sustainable development, we must do a good job in the safety and environmental protection management of oil fields. Only when we have sufficient awareness of environmental protection can we better implement relevant measures.
基金Sponsored by the National Natural Science Foundation of China:Visual perception based natural intervention for patients in HSCT wards(52278045)Innovative Technology Project of Chinese Rehabilitation Medical Association:Research on the correlation between rehabilitation services and ecological safety in sanatoriums(KFKT-2023-20).
文摘The ecological environmental safety of health resorts can prevent premature depletion of medical natural resources and avoid being polluted.In CNKI,Wanfang Database,Google Academic,Web of Science,and Pub Med database,Chinese search terms“health resort”,“convalescence”,“ecological environment”,“ecological safety protection”,“evaluation”,as well as English search terms“health resort”,“convalescence”,“ecological environment”,“ecological safety and security”,and“estimation”were searched,and a total of 33 articles were screened.The basic information of the 33 articles was recorded,and the types of evaluation models,evaluation indicators and indicator thresholds were summarized.The future development direction was proposed,and the enlightenment to the management and protection of health resorts was summarized.
文摘Because subway projects cannot control and protect driving, they mainly rely on the experience of the occupants in the field of maneuvering. Visual cues and t.d. are prone to accidents. To this end, we have developed an intelligent safety monitoring system (ISM) suitable for subway construction machinery. The ISM system consists of four parts: work monitoring subsystem, video subsystem, positioning subsystem and terrestrial radio communication subsystem. Each ISM subsystem of the subway engineering locomotive system, the function of equipment design and operation protection equipment, the relevance and working principle of each ISM subsystem are introduced in detail. The ISM system has the technical characteristics of high integration, high resource utilization, high reliability, knowledge connection and information collaboration. The ISM system is tested on the basis of two vehicles on Shanghai metro line 13, and the system meets the requirements of protection and surveillance.
文摘With the continuous development of national economy, the construction of engineering projects in China is also developing rapidly, which makes the safety protection management of construction projects more and more stringent. Only such construction project safety protection and management of all aspects of good, constantly summarize the building safety protection and management, strive to explore the experience of building safety. New methods and technologies of protection management can reduce the occurrence of unsafe accidents in construction and protect the lives and property of construction personnel. The safety protection of construction equipment is not only the basic guarantee for the development of construction enterprises, but also the premise for the efficient completion of construction projects. In short, only in this way in the construction safety protection management of a good job, can effectively ensure the construction project quality progress, construction enterprises stable and rapid development, promote the rapid development of the national economy. This research is divided into four main parts: the first part is an overview of the safety protection management theory in the construction process;the second part is the analysis of the current situation of safety protection management in the process of domestic construction;the third part is the detailed analysis of the problems existing in the construction safety protection management in our country;the fourth part is how to improve the safety protection management in the construction process. The countermeasures of strengthening construction safety protection management are summarized in the paper.
文摘In order to ensure the safety of buildings,equipment,personnel,property and production,to prevent or mitigate the disasters caused by lightning and static electricity,and to avoid the occurrence of serious lightning accidents,lightning protection inspection(acceptance)is of great significance.At present,in the process of inspection(acceptance)of lightning protection devices,there are following problems:professional and technical equipment for inspection is various and with different performances;the market demand for lightning-proof safety inspection is large,and entrusted units are increasing;the inspection process is difficult to be accurately obtained anytime and anywhere.Therefore,it is proposed to adopt technology of mobile application,wireless network transmission and computer software development to design and develop a data management system for lightning protection inspection based on Android,so as to realize the functions like real-time and comprehensive information management of professional lightning-proof inspection devices and entrusted units and establishment of electronic files for lightning-proof inspection of all projects.
文摘Starting with the goal and significance of software security testing,this paper introduces the main methods of software security testing in the open network environment,including formal security testing,white box testing,fuzzy testing,model testing,and fault injection testing.A software security testing method based on a security target model is proposed.This paper provides new ideas for software security testing,better adapts to the open network environment,improves the efficiency and quality of testing,and builds a good software application environment.
文摘In order to prepare the shielding fabrics with high efficiency of power frequency(PF)shielding and excellent electrical conductivity,different ratios of aramid/stainless steel fiber blended yarns were used to weave the shielding fabrics with different specifications.The fabric structure,fabric areal density,number of fabric layers,embedding ratio of copper-clad wires wrapped aramid yarns(denoted as CCWWA)and embedding direction were designed,and a total of 34 different types of shielding fabrics were woven for testing.The experiments were mainly conducted to study the influence mechanism of various factors on the PF shielding effectiveness by testing the electrical conductivity and PF shielding effectiveness of the fabrics.The research results indicate that the PF shielding effectiveness improves with increasing fabric areal density and metal fiber content.The fabrics embedded with CCWWA,particularly those with bidirectional embedding,exhibit a significant enhancement in the PF shielding effectiveness,showing an increase of 8-20 dB compared to the fabrics without CCWWA.The PF shielding effectiveness varies across different fabric structures,with plain weave fabrics demonstrating the superior PF shielding effectiveness due to their compact structure.Non-conductive base fabric has minimal impact on the PF shielding effectiveness.As the number of fabric layers increases,the PF shielding effectiveness initially improves but then declines,peaking with double-layer fabrics.
基金supported in part by the National Natural ScienceFoundation of China (U2013201)the National Science Fund for Distinguished Young Scholars (61825302)the Postgraduate Research&Practice Innovation Program of Jiangsu Province (KYCX20_0208)。
文摘In this paper, a disturbance observer-based safe tracking control scheme is proposed for a medium-scale unmanned helicopter with rotor flapping dynamics in the presence of partial state constraints and unknown external disturbances. A safety protection algorithm is proposed to keep the constrained states within the given safe-set. A second-order disturbance observer technique is utilized to estimate the external disturbances. It is shown that the desired tracking performance of the controlled unmanned helicopter can be achieved with the application of the backstepping approach, dynamic surface control technique, and Lyapunov method. Finally, the availability of the proposed control scheme has been shown by simulation results.
基金This work was supported by Research on the Influences of Network Security Threat Intelligence on Sichuan Government and Enterprises and the Development Countermeasure(Project ID 2018ZR0220)Research on Key Technologies of Network Security Protection in Intelligent Vehicle Based on(Project ID 2018JY0510)+3 种基金the Research on Abnormal Behavior Detection Technology of Automotive CAN Bus Based on Information Entropy(Project ID 2018Z105)the Research on the Training Mechanism of Driverless Network Safety Talents for Sichuan Auto Industry Based on Industry-University Synergy(Project ID 18RKX0667),Research and implementation of traffic cooperative perception and traffic signal optimization of main road(Project ID 2018YF0500707SN)Research and implementation of intelligent traffic control and monitoring system(Project ID 2019YGG0201)Remote upgrade system of intelligent vehicle software(Project ID 2018GZDZX0011).
文摘The increasing use of the Internet with vehicles has made travel more convenient.However,hackers can attack intelligent vehicles through various technical loopholes,resulting in a range of security issues.Due to these security issues,the safety protection technology of the in-vehicle system has become a focus of research.Using the advanced autoencoder network and recurrent neural network in deep learning,we investigated the intrusion detection system based on the in-vehicle system.We combined two algorithms to realize the efficient learning of the vehicle’s boundary behavior and the detection of intrusive behavior.In order to verify the accuracy and efficiency of the proposed model,it was evaluated using real vehicle data.The experimental results show that the combination of the two technologies can effectively and accurately identify abnormal boundary behavior.The parameters of the model are self-iteratively updated using the time-based back propagation algorithm.We verified that the model proposed in this study can reach a nearly 96%accurate detection rate.
基金This work is funded by the National Key Research and Development Plan(Grant No.2018YFB0803504)the National Natural Science Foundation of China(Nos.61702223,61702220,61871140,U1636215)the Opening Project of Shanghai Trusted Industrial Control Platform.
文摘Programmable Logic Controllers(PLC),core of industrial control systems,is widely used in industrial control systems.The security of PLC is the key to the security of industrial control systems.Nowadays,a large number of industrial control systems are connected to the Internet which exposes the PLC equipment to the Internet,and thus raising security concerns.First of all,we introduce the basic principle of PLC in this paper.Then we analyze the PLC code security,firmware security,network security,virus vulnerability and Modbus communication protocol by reviewing the previous related work.Finally,we make a summary of the current security protection methods.
基金Supported by the National High Technology Research and Development Program of China (863 Program) (2009AA012200)Henan Province Science and Technology Funding Projects ( SP09JH11158)
文摘Aiming at the problem that virtual machine information cannot be extracted incompletely, we extend the typical information extraction model of virtual machine and propose a perception mechanism in virtualization system based on storage covert channel to overcome the affection of the semantic gap. Taking advantage of undetectability of the covert channel, a secure channel is established between vip and virtual machine monitor to pass data directly. The vip machine can pass the control information of malicious process to virtual machine monitor by using the VMCALL instruction and shared memory. By parsing critical information in process control structure, virtual machine monitor can terminate the malicious processes. The test results show that the proposed mechanism can clear the user-level malicious programs in the virtual machine effectively and covertly. Meanwhile, its performance overhead is about the same as that of other mainstream monitoring mode.
文摘Objective: to analyze the occupational safety protection of the hospital hematology staff, construct the occupational exposure prevention system of hematology nurses, and strengthen the management of the prevention system. Methods: the 100 hematology staffs working in our hospital from January 2018 to January 2020 were selected as observers for 6 months to observe the occupational safety protection awareness and protective measures of our hospital. Hospitals explore risk factors and targeted protective measures. Results: wrong hand washing method, wrong disinfectant application method, wrong medical waste classification treatment method, work clothes or hand washing, no report after injury, blood after injury: 3.00%, 3.00%, 3.00%, 10.00% / 6.00%, 70.00% and 6.00%.Conclusion: risk factors include: chemical reagents, biological reagents, noise, radiation, risk factors low level, need to pay attention to their protection, constantly learn more protection knowledge, hospital hematology staff has been in risk factors, need to use better protective measures for risk prevention.
文摘Under the new situation of"integration of industrialization and industrialization"in China,security situational awareness is an important means to solve the problems of unclear boundaries,multiple roles and complex business relationships of industrial Internet.The main contents of the platform include industrial data collection,industrial protocol identification,industrial asset detection and industrial threat monitoring.Among them,risk prevention and detection,key data protection,cloud platform and identification resolution node protection are all important issues.On the one hand,escorting the industrial Internet business needs to summarize the industrial Internet network security data and master the network security situation from the overall perspective.On the other hand,it is also necessary to establish an industrial Internet platform security early warning and emergency response process system,promote the security rectification of industrial platform enterprises,find the security threats and risks that have been hidden in the industrial Internet platform for a long time,and provide perception and decision⁃making support for enterprises.
