Technologies for Asphalt Pavement Surface Testing in Road and Bridge Construction

Asphalt pavement is currently one of the main components in the construction of roads and bridges.However,from a practical point of view,various quality problems are prone to occur in the surface layer of asphalt pavement,which will lead to the poor overall quality of road and bridge projects.Therefore,it should be applied reasonably.Advanced testing technologies are used to test the mixture quality,compaction,segregation,thickness,and other aspects of the asphalt pavement surface layer,so as to improve the quality of the asphalt pavement surface layer,and then improve the overall quality of road and bridge construction.Therefore,this paper mainly analyzes the technologies for asphalt pavement surface layer testing in road and bridge engineering construction.

Acoustic Non-Destructive Testing Technology in Concrete Bridge Inspection and Pile Foundation Detection

This article takes the actual construction project of a certain concrete bridge project as an example to analyze the application of acoustic non-destructive testing technology in its detection.It includes an overview of a certain bridge construction project studied and acoustic non-destructive testing technology and the application of acoustic non-destructive testing technology in actual testing.This analysis hopes to provide some guidelines for acoustic non-destructive testing of modern concrete bridge projects.

Discussion on the Status Quo of Non-Destructive Testing Technology in Highway Engineering and Strategies of Improving the Quality of Testing

Highway test and detection technology play a very important role in controlling the quality of road and bridge engineering and improving the maintenance of roads and bridges.The study of highway bridge test detection technology is both theoretically and practically useful.Road and bridge test and detection is a complicated task.With the development of science and technology,highway and bridge engineering test and detection technology has also made great progress.The continuous improvement of test and detection technology has brought good social benefits to road and bridge construction.This article discusses the problems in test and detection technology of highway bridges and how to improve the quality of test and detection.

Advances of Genetic Testing Technology in Etiology Diagnosis of Recurrent Spontaneous Abortion

Recurrent spontaneous abortion (RSA) is a complex and heterogeneous disorder with multiple etiologies. Genetic factors are thought to play an important role in the etiology of RSA. With recent advances in genetic testing technologies, there has been an increasing interest in using these tools to diagnose the etiology of RSA. This review discusses the different types of genetic testing methods, such as karyotyping, chromosomal microarray analysis, next-generation sequencing, and their applications in the diagnosis of the etiology RSA. The use of genetic testing in the diagnosis of RSA has the potential to improve the accuracy of diagnosis and the understanding of the underlying mechanisms of the disorder, which could lead to better management and treatment of affected individuals.

Discussion and Research on Orthopedic Biomechanics Testing Technology

With the continuous development of today's science and technology,orthopedic research has also achieved continuous updates in materials and machinery.In this case,the mechanics testing technology of orthopedics also needs to be further updated and developed,so that it can effectively meet the requirement for today's orthopedic mechanical testing.Based on this,this article analyzes several advanced orthopedic mechanics testing techniques.It is hoped that this analysis can provide a reference for the good application and development of orthopedic mechanics testing technology.

TESTING TECHNOLOGY OF OXYGEN IN MINERALS WITH EPMA

EPMA has used to measure oxygen con- tent directly in recentyears. This paper discusses the fac- tors affecting the quantitativeanalysis of oxygen content and the optimal experimental conditions,and gives some measured results of oxygen content in corundums whichare collected from different geological situations.

Analysis on On-Site Asphalt Pavement Quality Inspection Technology in Highway Engineering

The acceleration of urbanization has promoted the increase in the number of urban highway projects,resulting in an increase of emphasis on the quality of urban highway projects.The quality and safety of highway construction directly affects the driving comfort,safety,and service life after it is put into operation.Among them,asphalt pavement is an important structure in highway construction,and it is also a key link that directly affects the construction quality.In order to ensure the quality of construction,it is necessary to strengthen on-site testing during the construction process to discover problems in time,and to ensure that the construction is up to standard.This paper mainly presents an analysis on the necessity and application of on-site quality inspection technology for asphalt pavement construction of highway engineering,and outlines measures to improve highway engineering construction testing technology.

Analysis of Highway Roadbed Performance Evaluation Technology

With the continuous development of China,the requirements for road construction are also increasing.Among them,strengthening the performance of roadbed test can effectively improve road construction.Besides,it is also crucial to perform suitable tests in a timely manner.Therefore,highway inspection technology should be improved for the continuous development of highway construction,which will be explained in this paper,in hopes of improving the construction of highway in China.

Application Strategy of CBR Test in Highway Engineering

California Bearing Ratio(CBR)test is highly professional and requires a high level of skills.In order to improve the accuracy of the test results,the relevant staff will not only need to understand the rules and procedures involved in the test,they would also need to be meticulous in their work to avoid human errors,provide good data support for highway engineering,and improve the overall quality of the project.Therefore,this paper presents an analysis of the application of CBR test in highway engineering,which can provide reference for engineering and promote the development of the highway industry.

Discussion on Test and Detection Technology of Highway Asphalt Pavement

The road traffic industry in China has been developing rapidly in recent years.Asphalt has become the main material in road construction because of its seamless connection and short construction period,and it has an important impact on the overall quality of highway construction.Therefore,it is necessary to conduct scientific and reasonable tests and detections for highway asphalt pavement.This paper presents a discussion on the test and detection technology of highway asphalt pavement for future reference.

Design of comprehensive test system for detecting overlying strata mining-induced fractures on surface with radon gas

Based on radon gas properties and its existing projects applications, we firstly attempted to apply geo- physical and chemical properties of radon gas in the field of mining engineering, and imported radioac- tive measurement method to detect the development process of the overlying strata mining-induced fractures and their contained water quality in underground coal mining, which not only innovates a more simple-fast-reliable detection method, but also further expands the applications of radon gas detection technology in mining field. A 3D simulation design of comprehensive testing system for detecting strata mining-induced fractures on surface with radon gas (CTSR) was carried out by using a large-scale 3D solid model design software Pro/Engineer (Pro/E), which overcame three main disadvantages of ''static design thought, 2D planar design and heavy workload for remodification design'' on exiting design for mining engineering test systems. Meanwhile, based on the simulation design results of Pro/E software, the sta- bility of the jack-screw pressure bar for the key component in CTSR was checked with a material mechan- ics theory, which provided a reliable basis for materials selection during the latter machining process.

A STUDY OF TESTS ON GLASS FIBER RESIN FRICTION MATERIALS

The relationships between the microstructure, the composition, the friction temperature and the form of a new kind of friction material which is a glass fibre resin friction materials (GFRF) are studied through a series of tests on machine as EPMA, STM, DTG-DTA,an optical microscope and a friction test machine. The tests show that the rising rate in temperature and the heat conductivity of GFRF are lower than that of asbestos friction material. In GFRF, the heat-decline is slowed down or even eliminated. the distribution of heat- stress is improved and the life span is extended. Raising the temperature of resin resolution and enhancing the stickness between resin and glass fibre are the two important procedures to improve the friction and wear performance of GFRF.A discription about the friction and wear mechanism of GFRF is given in this paper.

Research of Board-Level BIT Technology Based on Boundary-Scan Architecture

The boundary scan architecture and its basic principle of board level built in test(BIT) technology are presented. A design for board level built in test and the method to implement test tool are brought forward.

Application of Nanomaterials in the Rapid Detection of Pathogenic Microorganisms

Pathogenic microorganisms can cause infectious diseases in the human body and cause harm to humans.Under the continuous changes of human life style,sudden infectious diseases and sudden pathogenic microbial contamination in food have brought great challenges to human health.Traditional pathogenic microorganism detection is mainly carried out in laboratories with low speed,and requires experienced operators,which greatly affects the detection efficiency,and real-time monitoring cannot be achieved in the face of epidemics or food contamination.In response to these new situations,new on-site rapid detection methods have become a must,but to achieve the purpose of on-site rapid and immediate detection,higher requirements have been put forward to sensitivity and specificity.Due to their special photoelectric properties and adsorption properties,nanomaterials have gradually been applied in on-site rapid detection methods such as biosensors,and some substantial progress has been made.In this study,we introduced the actual application of nanomaterials in testing and their applications in on-site rapid testing,and made some prospects for the development of on-site rapid testing methods.

Application Strategy of NDT Technology in Tunnel Engineering Quality Inspection

Nondestructive testing(NDT)is an advanced and commonly used technique in tunnel engineering quality inspection.To achieve good application of nondestructive testing technology,its main application in tunnel engineering quality inspection strategy is analyzed,including the significance of applying nondestructive testing technology in tunnel engineering quality inspection,the main nondestructive testing technology applied in tunnel engineering quality test analysis,and the analysis of nondestructive testing technology of tunnel engineering quality inspection strategy.The analyses in this paper are done in hopes of providing scientific reference for the utilization of NDT technology and the improvement of tunnel engineering quality.

LM-3B Successfully Launched Communications Technology Test Satellite 2

At 23:18 Beijing time on January 5,a LM-3B carrier rocket lifted off from the Xichang Satellite Launch Center,sending a communication technology test satellite into its preset orbit.This successful launch was a good start for China’s launch missions in 2017.The Communications Technology Test Satellite 2 was developed by the Shanghai Academy of Spaceflight Technology.It is a next-generation telecom-

SJ-9A/B Satellites Conduct Key Technology Tests

On October 14, two satellites SJ-9A/B were sent into their preset orbits by a LM-2C/SMA launch vehicle, which is the first flight of a series of China's civilian technology experimental satellites. SJ-9A and B are the first two satellites in the series of civilian technology experimental satellites designed for tests such as long lifetime and high reliability, high precision and high performance of satellite, domestically developed core components, satellite formation

Hydrophobic long-chain two-dimensional perovskite scintillators for underwater X-ray imaging

The underwater X-ray imaging technology development is significant to subaqueous target reconnaissance/detection/identification, subfluvial archaeology,submerged resource exploration, etc. As the core of X-ray imaging detection, the scintillator has been plagued by inherent moisture absorption and decomposition, and strict requirements for seamless packaging and waterproofing.Here, we designed a manganese-doped two-dimensional(2D) perovskite scintillator modified by hydrophobic longchain organic amine through the combination of component and doping engineering. The modified perovskites show high water repellency that can be used as an underwater X-ray scintillator. X-ray images of aquatic organisms or other objects with a high spatial resolution of10 lp·mm^(-1) at a big view field(32 mm × 32 mm) were obtained by scintillation screen. This hydrophobic perovskite scintillator based on molecular design is of great promise in underwater X-ray nondestructive testing technology development.

Research on Testing Technology of Relay Protection for Intelligent Substations

Intelligent substations adopt various kinds of new technologies, including information sharing technology based on IEC61850, digital sampling technology, synchronization technology, and network transmission technology. Relay protection equipment faces all the challenges brought by the application of these new technologies. After analyzing the demand for test, the authors propose testing methods and technical requirements targeting the test items in great need, including ICD model file test, digital interface performance test, coordination performance test with merging unit and smart terminal, network pressure test. And the problems occurring during the tests are summarized.

A Fast Pseudorandom Number Generator with BLAKE Hash Function

This paper presents a fast pseudorandom generation algorithm,which is based on the BLAKE hash function and can pass the random test of the NIST（National Institute of Standards and Technology） Statistical Test Suite.Through theoretical analysis and experimental imitation,our new algorithm is proven to be more secure and efficient than G-SHA1.Simultaneously,we introduce and discuss the BLAKE in detail.Its security shows that can be utilized to generate pseudorandom bit sequences,which the experimental results show the BLAKE hash function has excellent pseudorandomness.Therefore,we believe the BLAKE is one of the most potential candidate algorithms of SHA-3 program.