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81.
Béla Szentpáli Gábor Matyi Péter Fürjes Endre László Gábor Battistig István Bársony Gergely Károlyi Tibor Berceli 《Microsystem Technologies》2012,18(7-8):849-856
This work is intended to describe the design aspects and to characterize the functionality of a novel thermopile structure applicable for detecting millimetre range and THz radiation. The proposed thermopile consists of a series of micromachined poly-crystalline silicon thermocouple strips arranged linearly. This device can act as a series of antennas; its antenna-like operation was demonstrated clearly by the strong polarization dependence when detecting microwave radiation. The sensing principle is similar to the basic operation of bolometers in that the absorbed radiation heats up the semiconductor strips, but the temperature increment is detected by the Seebeck effect instead of the resistance change. Therefore there is no read-out current and the voltage output starts from zero. In the present work we are going to show the simulation of the current distribution. The fabrication of the device will also be outlined, as well as the results of measurements performed at 13, 100?GHz, and both in broad-band THz and in infrared radiation. 相似文献
82.
Gergely HományiAuthor Vitae Lóránt Farkas Author VitaeKristóf Aczél Author Vitae 《Computer Standards & Interfaces》2011,33(3):315-324
A set of smart phones distributed in space may constitute a powerful recording device that is able to create audio/video recordings of social events in a location-aware manner. Such events are formal and informal meetings with 2 or more participants. If each person has a smart phone, this can be programmed to record his speech and skip the speech of the rest of people. Proximity networking capabilities let the individually recorded content be aggregated and distributed to each smart phone.In this paper we analyze such a scenario in which Symbian S60 platforms with Bluetooth version 1.2 stack were used. A distributed recording and content delivery framework is proposed and its performance analyzed by means of simulation and measurements. The validation of our algorithm has been performed using a prototype implementation over these platforms. 相似文献
83.
Tailoring the atomic structure of graphene nanoribbons by scanning tunnelling microscope lithography
The practical realization of nanoscale electronics faces two major challenges: the precise engineering of the building blocks and their assembly into functional circuits. In spite of the exceptional electronic properties of carbon nanotubes, only basic demonstration devices have been realized that require time-consuming processes. This is mainly due to a lack of selective growth and reliable assembly processes for nanotubes. However, graphene offers an attractive alternative. Here we report the patterning of graphene nanoribbons and bent junctions with nanometre-precision, well-defined widths and predetermined crystallographic orientations, allowing us to fully engineer their electronic structure using scanning tunnelling microscope lithography. The atomic structure and electronic properties of the ribbons have been investigated by scanning tunnelling microscopy and tunnelling spectroscopy measurements. Opening of confinement gaps up to 0.5 eV, enabling room-temperature operation of graphene nanoribbon-based devices, is reported. This method avoids the difficulties of assembling nanoscale components and may prove useful in the realization of complete integrated circuits, operating as room-temperature ballistic electronic devices. 相似文献
84.
Pal Manoj Kumar Gergely Gréta Koncz-Horváth Dániel Gácsi Zoltán 《Powder Metallurgy and Metal Ceramics》2020,58(9-10):529-537
Powder Metallurgy and Metal Ceramics - In the present study, an electroless nickel (EN) plating method is applied for the coating of silicon carbide (SiC) particles. The particles of SiC(Ni) were... 相似文献
85.
Ferenc Rudolf Tóth Zoltán Ladányi Gergely Siket István Gyimóthy Tibor 《Software Quality Journal》2020,28(4):1447-1506
Software Quality Journal - Bug datasets have been created and used by many researchers to build and validate novel bug prediction models. In this work, our aim is to collect existing public source... 相似文献
86.
Márton Csernai András Gulyás Attila Kőrösi Balázs Sonkoly Gergely Biczók 《Computer Networks》2013,57(6):1373-1393
Current trends in cloud computing suggest that both large, public clouds and small, private clouds will proliferate in the near future. Operational requirements, such as high bandwidth, dependability and smooth manageability, are similar for both types of clouds and their underlying data center architecture. Such requirements can be satisfied with utilizing fully distributed, low-overhead mechanisms at the algorithm level, and an efficient layer 2 implementation at the practical level. On the other hand, owners of evolving private data centers are in dire need of an incrementally upgradeable architecture which supports a small roll-out and continuous expansion in small quanta. In order to satisfy both requirements, we propose Poincaré, a data center architecture inspired by hyperbolic tessellations, which utilizes low-overhead, greedy routing. On one hand, Poincaré scales to support large data centers with low diameter, high bisection bandwidth, inherent multipath and multicast capabilities, and efficient error recovery. On the other hand, Poincaré supports incremental plug & play upgradability with regard to both servers and switches. We evaluate Poincaré using analysis, extensive simulations and a prototype implementation. 相似文献
87.
The application of neutrality is a straightforward tool to preserve population diversity since it allows the genotype (on the represented search space) to be changed without affecting the corresponding fitness. To implement neutrality the literature suggests representational redundancy (more to one correspondence in genotype–phenotype mapping) although using it as a source of neutrality researchers uniformly reported better or worse results. Instead of applying representational redundancy here the utilization of pseudo redundancy as the source of neutrality is proposed, that is, neutrality is achieved by simple objective-fitness transformation while pseudo redundancy (as another redundancy interpretation) denotes more to one correspondence between objective-fitness domains by objective-fitness mapping. The contribution of this work is specified by the dynamic generational gap model introduced for evolutionary algorithms which appears when elitist strategy is used under neutrality by pseudo redundancy. This paper investigates the influence of dynamic generational gap model on the performance of a micro-genetic algorithm framework applied to achieve least cost water pump control policy for an industrial size water network distribution system. The presented constrained mixed-integer optimization problem is originated from the regional water network of the city of Sopron (60,000 citizens) located in Hungary. Here, the goal is to obtain intra-day pump schedule which minimizes the cost required for operation while satisfies the system constraints (water reservoir level limitations, pump flow and delivery regulations, pump energy consumption limitations) and fulfills the water requirement by the users. 相似文献
88.
Watson John S.; Gergely Gyorgy; Csanyi Vilmos; Topal Jozsef; Gacsi Marta; Sarkozi Zsuzsanna 《Canadian Metallurgical Quarterly》2001,115(3):219
Prior research on the ability to solve the Piagetian invisible displacement task has focused on prerequisite representational capacity. This study examines the additional prerequisite of deduction. As in other tasks (e.g., conservation and transitivity), it is difficult to distinguish between behavior that reflects logical inference from behavior that reflects associative generalization. Using the role of negation in logic whereby negative feedback about one belief increases the certainty of another (e.g., a disjunctive syllogism), task-naive dogs (Canis familiaris; n?=?19) and 4- to 6-year-old children (Homo sapiens; n?=?24) were given a task wherein a desirable object was shown to have disappeared from a container after it had passed behind 3 separate screens. As predicted, children (as per logic of negated disjunction) tended to increase their speed of checking the 3rd screen after failing to find the object behind the first 2 screens, whereas dogs (as per associative extinction) tended to significantly decrease their speed of checking the 3rd screen after failing to find the object behind the first 2 screens. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
89.
Brett P. Krull Ryan C. R. Gergely Windy A. Santa Cruz Yelizaveta I. Fedonina Jason F. Patrick Scott R. White Nancy R. Sottos 《Advanced functional materials》2016,26(25):4561-4569
The maximum volume that can be restored after catastrophic damage in a newly developed regenerative polymer system is explored for various mixing, surface wetting, specimen configuration, and microvascular delivery conditions. A two‐stage healing agent is implemented to overcome limitations imposed by surface tension and gravity on liquid retention within a damage volume. The healing agent is formulated as a two‐part system in which the two reagent solutions are delivered to a through‐thickness, cylindrical defect geometry by parallel microvascular channels in thin epoxy sheets. Mixing occurs as the solutions enter the damage region, inducing gelation to initiate an accretive deposition process that enables large damage volume regeneration. The progression of the damage recovery process is tracked using optical and fluorescent imaging, and the mixing efficiency is analyzed. Complete recovery of gaps spanning 11.2 mm in diameter (98 mm2) is achieved under optimal conditions. 相似文献
90.
T. C. Illingworth I. O. Golosnoy V. Gergely T. W. Clyne 《Journal of Materials Science》2005,40(9-10):2505-2511
Diffusion in material of inhomogeneous composition can induce phase changes, even at a constant temperature. A transient liquid phase (TLP), in which a liquid layer is formed and subsequently solidifies, is one example of such an isothermal phase change. This phenomenon is exploited industrially in TLP bonding and sintering processes. Successful processing requires an understanding of the behaviour of the transient liquid layer in terms of both diffusion-controlled phase boundary migration and capillarity-driven flow. In this paper, a numerical model is presented for the simulation of diffusion-controlled dissolution and solidification in one dimension. The width of a liquid layer and time to solidification are studied for various bonding conditions. A novel approach is proposed, which generates results of a high precision even with coarse meshes and high interface velocities. The model is validated using experimental data from a variety of systems, including solid/solid diffusion couples. 相似文献