谈试验检测技术在道路桥梁中的运用

伴随着我国公路桥梁工程建设事业的不断发展和进步,使得各个地区之间的经济往来日益频繁,但是在道路桥梁工程使用一段时间之后,势必会对其进行养护和维修工作。要想有效保障和提高道路桥梁工程养护维修的效果和质量,在进行维修之前,需要对其进行检测。从目前的情况来看,当前比较先进的桥梁检测技术主要有无损检测的图像技术、声发射检测技术、超声波检测技术以及探地雷达检测技术等,文章针对以上技术展开一系列的叙述。

钢筋混凝土桥梁试验检测技术及其发展趋势

在公路桥梁的施工过程中利用公路钢筋混凝土桥梁试验检测技术对公路桥梁的建设材料、整体性能以及裂痕和损伤进行试验和监测是非常必要的.因此,相关部门必须要针对目前公路桥梁运营过程中存在的各种安全问题,不断的完善和提升相应的试验检测技术,以便及时的发展其中的安全隐患,并采取有效的措施进行处理,从而确保公路桥梁运营的安全性,提升交通运输的通畅性.

An Extended Ontology Model and Ontology Checking Based on Description Logics

Ontology is defined as an explicit specification of a conceptualization. In this paper, an extended ontology model was constructed using description logics, which is a 5-tuples including term set, individual set, term definition set, instantiation assertion set and term restriction set. Based on the extended model, the issue on ontology checking was studied with the conclusion that the four kinds of term checking, including term satisfiability checking, term subsumption checking, term equivalence checking and term disjointness checking, can be reduced to the satisfiability checking, and satisfiability checking can be transformed into instantiation consistence checking.

Risk Analysis： A Methodology Applicable to the Building Inspection

The lack of care related to maintenance management is directly linked to the absence of plans for maintenance of buildings. Because of that, there is a big incidence of building accidents caused by the negligence of managers and the lack of investment. The research has shown that, although building inspection is a consolidated building maintenance tool, managers do not prepare their building maintenance plan, nor use building inspection as a tool, leading the buildings to the premature obsolescence. The research calls attention to the building inspection technique that can be used to evaluate building maintenance and conservation. It is also a tool for analysis and investment planning based on actions to solve failures and anomalies that might come out during the building inspection. Those failures and anomalies are classified according to their degree of risk, determining the technical priorities of the investment adjustment in the maintenance plan. The paper presents a risk analysis methodology which classifies inspect elements in a building, determining the priority order of services to be executed on a scale from minimum risk （1） to imminent risk （5）. The method shows a tool for building inspection, and it serves as a guideline for building maintenance interventions.

Further Considerations of 100Gbit/s Wavelength Division Multiplexing System Commercial Application

Along with the emergence and ma- turity of 100Gbit/s technologies, numbers of trial and commercial 100Gbit/s Wavelength Division Multiplexing （WDM） systems have been established worldwide. The research- oriented lab tests of 100Gbit/s WDM systems were done by China Unicorn in 2012. The 100Gbit/s technologies of polarization multi- plex-quadrature phase shift keying with co- herent detection from multiple vendors have been studied. There are some further issues to be specified before the commercial application of 100Gbit/s WDM system is implemented in large scale in backbone network, including optical pertbnnance parameters, optical per- lbrmance monitoring of 100Gbit/s system, protection mechanism, selection of client in- terfhce and comprehensive Operation, Ad- ministration and Maintenance （OAM）.

Determination of Postvaccinal Antibodies Against OspA B. afzelii, B. garinfi and B. burgdorferi sensu stricto Using Elisa Method

The specific recombinant proteins rOspA B. afzelii, rOspA B. garinii a rOspA B. burgdorferi sensu stricto were used as antigens for construction of ELISA sets. ELISA examination enables determination of specific post-vaccination antibodies against OspA B. afzelii, B. garinii a B. burgdorferi sensu stricto.Using recombinant DNA technology, genes from B. afzelii, B. garinii and B. burgdorferi sensu stricto were inserted into E. coli-expression vectors and the rOspA proteins were produced. These proteins were used for the construction of ELISA kits for the determination of post-vaccination antibodies against individual Borrelia serovars contained in the vaccine. The antibody response of dogs vaccinated with whole-cell vaccine BORRELYM 3 and non-vaccinated dogs was monitored and compared. The ELISA method proved as highly sensitive for the determination of post-vaccination antibodies against individual Borrelia serovars in vaccinated animals. Detection of these antibodies and their quantification may be used for evaluation of efficiency of vaccines against Lyme borreliosis in dogs caused by Borrelia burgdorferi sensu lato. Prospectively, it will be necessary to establish a correlation between post-vaccination antibody levels and protective immunity of vaccinated dogs.

Preliminary study on theory and experiment of photo-mechanics manufacturing and detecting technologies based on laser thermal stress

Mechanics effect of laser thermal stress is a new manufacturing technology, which uses thermal stress by high power laser acted on the surface of metal material to produce stress field. The technologies such as sheet metal formation by laser thermal stress, measurement by laser scratching and measurement by XRD (X-ray diffraction) are formed based on mechanics effects of laser thermal stress. The mechanisms of sheet metal formation by laser thermal stress, measurement by laser scratching and measurement by XRD are analyzed, and the theory of photo-mechanics manufacturing and detecting technologies based on laser thermal stress is originally put forward, whose experiment is primitively researched, and the manufacturing theory by mechanics effects of laser thermal stress is established.

Microscopic Inspection on Developmental Process of Myeloma Cells

The developmental process of Myeloma cells under a digital optical microscope has been inspected and monitored by using time-lapsed recording technique. Myeloma cells were cultured in medium contained 20% and 50% of Fetal Bovine Serum （FBS）, respectively. Inspection and monitoring for 6 hours showed the effect of the FBS to mobility, proliferation rate, and development of cell cycle phases of Myeloma cells. Using time-lapsed data, the speed of cells was 3.5-6.0 pm/s when using FBS 20% and increased to 5.0-8.0 p.m/s when using FBS 50%. The rate of cells decreases from 2 cells/hr when using FBS 20% to 1/6 cells/br when using FBS 50%. The cells division process is signified by the change in gray level and it took every 50-70 minutes.

Wall sheeting diagnosis in fluidized beds based on chaos analysis of acoustic emission signals

A novel method, based on acoustic emission (AE) techniques, for detecting agglomeration in fluidized beds is presented. Particle size characteristics are determined based on the principle that AE signals with different frequency band energies are emitted when particles of different sizes impact an internal wall. By applying chaotic analysis to the AE signals, the malfunction coefficients are well defined. Agglomeration in the fluidized bed can then be detected by the sudden variation of malfunction coefficients. AE signals were investigated in a laboratory scale heated fluidized bed and an industrial polyethylene fluidized bed. Experimental data showed that the malfunction coefficients increased with the growth of agglomeration. The results indicated that agglomeration in fluidized beds can be predicted and diagnosed effectively and precisely using AE techniques based on chaotic analysis.

Inspection of reinforced concrete interface delamination using ultrasonic guided wave non-destructive test technique

An ultrasonic-guided wave(UGW) is a very promising tool in the field of structural health monitoring and non-destructive test.Numerical analysis was used to simulate the propagation in the rebar and explore the characteristics of UGW in the steel rebar waveguide.Two-dimensional fast Fourier transform was used to process the numerical results and to evaluate the damage.Subsequently,different UGW test influence factors were investigated.The results clearly showed that both the group velocity and the amplitude of longitudinal modes were not very sensitive to stress and temperature variations.However,the received UGW signal energy decreased with the increasing concrete strength.Finally,the interface condition between the concrete and the rebar was investigated.Time-domain and frequency-domain analyses were used to process the received signals.Different interface delamination lengths of the UGW energy attenuation were analyzed and a relationship was obtained.This study successfully proved that UGW is an effective tool in the non-destructive test of reinforced concrete interface delamination.

Nearly deterministic quantum Fredkin gate based on weak cross-Kerr nonlinearity

A scheme of an optical quantum Fredkin gate is presented based on weak cross-Kerr nonlinearity. By an auxiliary coherent state with the cross-Kerr nonlinearity effect, photons can interact with each other indirectly, and a non-demolition measurement for photons can be implemented. Combined with the homodyne detection, classical feedforward, polarization beam splitters and Pauli-X operations, a controlled-path gate is constructed. Furthermore, a quantum Fredkin gate is built based on the controlled-path gate. The proposed Fredkin gate is simple in structure and feasible by current experimental technology.