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991.
The electronic band structure of InN, InAs and InSb has been investigated by ETB. The ETB method has been formulated for sp3d2 basis and nearest neighbor interactions of the compounds and its energy parameters have been derived from the results of
the present first principles calculations carried on InN, InAs and InSb. It has been found that the present ETB parameters
can produce the band structure of the compounds successfully. 相似文献
992.
Amal Badshah Khattak Aurang Zeb Maazuulah Khan Nizakat Bibi Ihsanullah Mohammad Saeed Khattak 《Food chemistry》2007,103(1):115-120
Effects of germination time and illuminations on sprout yield, biosynthesis of ascorbic acid, cooking ability and moisture accumulation in chickpeas were significant (p ? 0.01). Green light had the highest promoting effect on the ascorbic acid level (40.59 mg/100 g) as compared to other illuminations but significantly reduced the sprout yield (188.6 g) as compared to dark, fluorescence and γ-rays illuminations with significantly high sprout yield (196 g) and imbibing moisture (51%). Cooking time was reduced by 43% due to γ-rays in un-soaked seed. Cooking time increased in all treated chickpea samples after 24 h germination and thereafter decreased significantly. Red light significantly increased the cooking time (68.44 min) followed by fluorescent (64.5 min), yellow (61.8 min) and green light (60.9 min). The results indicated that germination of chickpea under green light was an effective process in enhancing ascorbic acid content while dark, fluorescence and γ-rays were effective in promoting sprout growth and to some extent biosynthesis of ascorbic acid. 相似文献
993.
In supply chain management (SCM), multi-product and multi-period models are usually used to select the suppliers. In the real world of SCM, however, there are normally several echelons which need to be integrated into inventory management. This paper presents a hybrid intelligent algorithm, based on the push SCM, which uses a fuzzy neural network and a genetic algorithm to forecast the rate of demand, determine the material planning and select the optimal supplier. We test the proposed algorithm in a case study conducted in Iran. 相似文献
994.
Mohammad Ilyas 《Computers & Industrial Engineering》1987,13(1-4):237-241
This paper deals with internetworking aspects of local area networks (LANs) with other local area networks and/or long-haul networks. Two types of LAN topologies are considered: bus and ring. Internetworking topologies discussed in this paper include, (i) networking of ring LANs via a bus LAN, (ii) networking of ring LANs via a ring LAN, (iii) networking of bus LANs via a bus and (iv) networking of LANs to long-haul networks. Advantages and disadvantages of these topologies are discussed in terms of their performance and other features. 相似文献
995.
Mohammad Rezaul Karim Kwon Taek Lim Mu Sang Lee Ketack Kim Jeong Hyun Yeum 《Synthetic Metals》2009,159(3-4):209-213
Sulfonated polyaniline–titanium dioxide (SPAni–TiO2) hybrid composites have been synthesized by using a new strategy in one-pot system of UV-cured polymerization method. Aqueous solution of aniline and orthoanilinic acid comonomers, a free-radical oxidant and titania precursor were irradiated by UV rays. Hydrolysis and reprecipitation of the titania precursor in aqueous aniline and orthoanilic acid lead to the formation of titanium dioxide particles which in turn catalyze oxidation of comonomers to sulfonated polyaniline. The resultant SPAni–TiO2 composites were characterized by using different spectroscopy analyses like X-ray diffraction, UV–visible (UV–vis) and infrared spectroscopy. The UV–vis absorption bands revealed that SPAni–TiO2 nanocomposites are optically active and the blue-shifted peaks due to the presence of titania within the SPAni matrix. Scanning electron microscopy and transmission electron microscopy of the nanocomposite showed a uniform size distribution with spherical and granular morphology. Thermogravimetric analysis revealed that the SPAni–TiO2 composites have a good thermal stability than the pristine SPAni. 相似文献
996.
Mohammad Mazaheri Yousef S. Kavian Hamid Sharif Habib F. Rashvand 《Wireless Communications and Mobile Computing》2016,16(15):2406-2418
Because of the practical limitations of the energy and processing capabilities, the deployment of many Wireless Sensor Networks (WSN) is facing two main challenges of increasing network lifetime and reducing End to End Delay (EED) which become critical when the nodes are mobile and use non‐rechargeable energy sources. One way to help to extend network lifetime is using fuzzy logic in a form of artificial intelligence. To this end we propose a new routing protocol for using mobile WSNs, which holds the nodes in an equal level of energy and decreases energy dissipation of the network. An optimum path is selected based on the cost of each node to increase network lifetime. In order to lessen EED, we also attempt to design a novel zoning‐scheme for the network area. In this scheme, zonation is dynamic and works based on the Data Link (DL) position. The simulation result shows a significant improvement in lifetime and EED by proposed protocol compared with existing protocols. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
997.
Since electricity demand is increasing continuously, it is necessary to invest in expansion of distribution network capacity. From the asset management point of view, it is necessary to encourage the private sector to invest in distribution network. To do this, distribution network managers must provide important opportunities for private sector to profit from their investments. One of the options for private sector is to invest on distributed generations (DGs). In this regard, distribution company (DisCo) must sign power purchase agreement (PPA) with DG owners (DGOs). So, optimal siting, sizing and PPA rates from economic point of view are important challenges which are considered as the main contribution of this paper. The proposed methodology of this paper applies load and price uncertainties into the planning problem. The proposed scheme involves using non-dominated sorting genetic algorithms II (NSGA II), since it attains non-dominated solutions in which DisCo and the DGO can put their personal preferences into practice. To evaluate the effectiveness of the suggested method, the computer simulations are done on a 33-bus distribution network and the results are discussed. 相似文献
998.
In an irregular prism tensegrity, the number of force equilibrium equations is less than the number of unknown parameters of nodal coordinates and member force ratios. As a result, the form-finding process normally becomes nonlinear with additional conditions or needs to be carried out with the use of iterative procedures. For cases of irregular prism tensegrity which involves large number of members, it was found that previously proposed methods of form-finding are not practical. Moreover, there is a need for a form-finding approach which is able to cater to different requirements on final configuration. In this paper, the length relation condition is introduced to be used in combination with the force equilibrium equation. With the combined use of length relation and equilibrium conditions, a linear form-finding approach for irregular prism tensegrity was successfully formulated and developed. An easy-to-use interactive form-finding tool has been developed which can be used for form-finding of irregular prism tensegrities with large number of elements as well as under diverse specific requirements on their configurations. 相似文献
999.
Seyed Mohammad Davachi 《Polymer-Plastics Technology and Engineering》2015,54(9):944-967
Polylactic acid (PLA) is a biodegradable polymer with exceptional properties that has been studied extensively for the past 25 years. The possibility of using devices in human body with minimum inflammation and infection to allow natural healing has obliged researchers to search for biocompatible and biodegradable alternatives. Polylactic acid is one of the most promising biopolymers used in world today. Due to its organic source, it has attracted many attentions. This review presents information about the properties, monomer types, kinetics and different synthesis methods that are currently employed for production of polylactic acid as well as its biomedical and clinical applications in scaffolds, drug delivery systems, bone fixation devices such as screw and plates, surgical suture and meshes. 相似文献
1000.