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Antimonene is a new 2D material and its applications in gas sensors are still deficient. We took a first principles investigation of three small organic molecules (formaldehyde, acetone, and methane) adsorption on the antimonene. We found that only the adsorption of the acetone molecule could induce a moderate adsorption energy, obvious charge transfer, and large work function change, which are suitable...
To improve the identification rate of environment of intensive tags, this paper presents an anti-collision algorithm for fast adjustment of the frame slot index Q. The algorithm establishes a probability distribution model to predict the number of tags and builds a relationship between the number of tags and optimal frame slot Q by curve fitting that use measured data, which can quickly achieve the...
Per-User Unitary Rate Control (PU2RC) performs poorly when the number of users is small and suffers from the sum-rate ceiling effect in the high signal-to-noise ratio (SNR) regime. In this paper, we propose a multimode transmission (MMT) strategy to overcome these inherent shortcomings of PU2RC. In the proposed MMT strategy, the transmitter finds out the optimal transmission mode and schedules users...
This paper improved the previous process and used the exhaust after the reaction to heating the feeding gas, in order to achieve rational use of energy. Used HZSM-5 as carrier of catalysts, the modification of copper-vanadium catalyst Cu3V2O8/ZSM-5 was studied, and the best one was founded. Results showed that CoO-K2SO4-Ni-Cu3V2O8/ZSM-5 modified by cobalt, potassium sulphate and nickel chloride had...
Image semantic retrieval usually involves two steps, namely image annotation and annotation-based retrieval. Although there is a rich literature on image auto-annotation, little focuses on bridging the gap between annotation and retrieval. In fact, the efficiency of an image semantic retrieval system depends not only on the precision of annotation but also the way to use the annotation result in the...
China has the rich bamboo resource, moreover, the species and yield of bamboo both are the first in the world. The extract of bamboo root was often used to cure some intractable diseases in the countryside of China, but the components of bamboo root extract is still unresolved. In order to expedite medicinal application of bamboo root, and to provide further scientific foundation for its top value-added...
There was a long detection circle and higher cost in the quantitative detection of anaerobic deitrifying bacteria (ADNB) in the wastewater of bioreactor and oil field. To solve these issues, the ADNB-MPN-PCR method, combining polymerase chain reaction(PCR) technology with most probable number, was studied as a rapid quantitative detection method for ADNB. The bacterium solution directly used for PCR...
With increasingly fierce competition in the construction market, project management urgently need a feasible, stable and accurate project schedule plan which can be implemented smoothly in a dynamic environment. The traditional methods, such as CPM/PERT, has been unable to deal with the actual project with the uncertain duration and resource constraints. Although some researchers have adopted critical...
Stream-media technology is a hotspot of research these days. The performance of stream-media service provided by the Internet based on TCP/IP protocol is always changing with the variation of network and is easily affected by the network parameters. During the developing of stream media, service performance Measurement is very important. This paper proposes parameter definitions to measure performance,...
Ultrasonic wire bonding is one of the main methods in the package of the chip and substrate of the chip. The vibrations of transducer were tested. Surrogate-data method of phase-randomized based on correlation dimension is proposed to identify the nonlinear chaos of data obtained by ultrasonic wire bonding system. The result indicate there is nonlinear factor in the axial direction of the amplitude...
As changes constitute the main cause of schedule delay, cost overrun and other distributions, change management is an important aspect in construction project management. Many change management systems has been developed to minimize the impacts of change or to facilitate change management. However, changes should be predicted as early as possible, and then enable project management teams to take pre-management...
Friction forces exert more important influences on the reliabilities of a micro-valve. As the dimension getting smaller, sometimes friction forces can cause the failure of a system by stopping the parts moving. A micro servo valve is designed for medical equipment, in which the spool is directly driven by an eccentric shaft. All the friction forces acting on both the eccentric shaft and the spool...
MIMO is a main technique of improving system capacity in wireless communication, but its application is limited by spatial correlation and requirement of traditional VBLAST system about the amount of transmitting and receiving antennas. This paper presents an adaptive MIMO transmission technique. Adopting uniform channel decomposition (UCD), STBC and antenna grouping, the proposed MIMO scheme can...
Project managers often face the problem of how to evaluate the impact of schedule pressure on projects, and need to use overtime and overmanning to get work done on time when schedule pressure occurs. In a project, personnel fatigue, efficiency loss, quality problems and cost increases, which interact to be feedback loops, and the loops create a project's dynamics system. Some traditional methods,...
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