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Hardening trends of X-ray beams from three X-ray machines of different energies traversing aluminium plates of different thickness were simulated by means of Monte-Carlo method, as well as the processes of areal density measuring，and corresponding experimental researchwas done.The effects of X-ray beams hardening on the measurement sensitivity were analyzed. For the X-ray beams from X-ray machine the same energy, X-ray beams harden more with the areal density increasing, which brings about the reduction of the measurement sensitivity;The lower the energy of photons is , the more quicklythe measurement sensitivity reduces, and vice versa. For a certain areal density range, when X-ray photons can just traverse the part of the maximum areal density by adjusting the X-ray tube voltage, the best measurement sensitivity can be obtained.

Much of the work in the smart house technology has been done on individual technologies, but little has been done on their integration into a cohesive whole. The Bluetooth house project at Massey University in New Zealand, which was initiated in 2002, embraced a systems engineering approach to design a usable smart house, aiming at a complete and integrated solution, which can be customised, based on individual needs, to give elderly people independence, quality of life, and the safety they require. This paper presents how the Massey Bluetooth smart house design project has been carried out and what the smart home may look like in the near future. Considering current technical feasibility and the advances in other research, it is suggested that for a house to be considered as truly ‘smart’, four levels of smartness are imperative: smart sensors, smart management, smart control, and smart appliances. The Bluetooth house at Massey University incorporates these four smart technologies and allows all these individual technologies to be integrated into a seamless whole. For smart sensing, the project employed Bluetooth technology to connect the whole house, and to locate the user’s position. In order to coordinate all the technologies, a smart management system was developed, that is capable of coordinating the information for commands, feedback from smart appliances, and user’s location information. It can make intelligent decisions on what to do, or relay necessary information to individual intelligent devices throughout the house. In addition, the medium of communication with the house must be as natural as possible, in order to make it as easy as possible for the occupants of the smart house to interact with and the various smart appliances. A voice-activated universal remote control and a new microphone system are being developed to this end. Finally, the smart house has to provide an enjoyable experience that can promote the uptake of smart house technology by users in the future. An interactive TV environment is being developed to this end. The Massey Bluetooth house project is not so much aimed at a cutting-edge technology in smart house design, but at integrating technologies into a seamless, cohesive whole through the application of four levels of smartness.

Transient in-line holographic imaging system is optimized for recording the holograms of detonation loaded microjet particles with a velocity higher than 5 km/s. Then an adaptive multithreshold image segmentation method is developed to improve the measurement precision of particle size and number. The measured size of ejected particles is from several microns to over ten microns, and the processing errors of particle number and size are less than 5% and 15%, respectively. The statistical results also show that the size, number, and velocity of microjet particles vary depending on the surface conditions of the Al metal debris. Compared with a uniform metal sample, the nonuniform metal sample with cone-shaped hole exhibits more ejected particles, larger particle size, and higher velocity.

In this paper, the spring model for the anisotropic interface layer is built and introduced to the global matrix technique that is popularly used for analyzing layered composites. In introducing the spring interface condition, the philosophy adopted is to incorporate it with a minimum disruption to the program structur e, particularly the assembly of the global matrix. The spring interface has ther efore been introduced as a "material layer". This layer has material constants w hich govern the stiffness across it and has zero thickness. The layer can be bui lt into the appropriate location in the global matrix without making any changes in the other layers of the system. Numerical computations for the Lamb wave dis persion curves in two-layered anisotropic composite media with different interfa ce conditions including rigid connection, slip connection, and complete disbond are made，and plots of the through-thickness particle displacement distributions of Lamb modes for the rigid bond interface and slip bond interface are compared .