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21.
Aydin Atakan Beyza Macunluoglu Yuksel Kaya Elif Ari Halit Demir Ebru Asicioglu Cigdem Kaspar 《Hemodialysis international. International Symposium on Home Hemodialysis》2014,18(1):62-69
Cardiovascular disease (CVD) is the main cause of mortality in hemodialysis (HD) patients. Epicardial fat tissue (EFT) is a new risk factor in CVD. The aim of this study was to evaluate the association between EFT and coronary artery flow reserve (CFR), which is an early indicator of endothelial dysfunction in coronary vessels of HD patients. We performed a cross‐sectional study including 71 chronic HD patients and 65 age‐ and sex‐matched healthy controls. Epicardial fat tissue was significantly higher in HD patients when compared to healthy controls (6.53 ± 1.01 mm vs. 5.79 ± 1.06 mm, respectively, P < 0.001). On transthoracic Doppler echocardiography, CFR values were significantly lower in HD patients when compared to healthy controls (1.73 ± 0.11 vs. 2.32 ± 0.28, P < 0.001). Correlation analysis showed CFR values to be inversely correlated with EFT (r = ?0.287, P < 0.05). Multiple linear regression analysis was used to define independent determinants of EFT in HD patients. Artery flow reserve, age, body mass index and total cholesterol levels were independently correlated with EFT thickness. This study demonstrated that EFT was significantly higher among HD patients compared to healthy controls. In addition, this study was the first to demonstrate an inverse correlation between EFT and CFR in this patient population. 相似文献
22.
Due to the innate complexity of the task drivers have to manage multiple goals while driving and the importance of certain goals may vary over time leading to priority being given to different goals depending on the circumstances. This study aimed to investigate drivers’ behavioral regulation while managing multiple goals during driving. To do so participants drove on urban and rural roads in a driving simulator while trying to manage fuel saving and time saving goals, besides the safety goals that are always present during driving. A between-subjects design was used with one group of drivers managing two goals (safety and fuel saving) and another group managing three goals (safety, fuel saving, and time saving) while driving. Participants were provided continuous feedback on the fuel saving goal via a meter on the dashboard. The results indicate that even when a fuel saving or time saving goal is salient, safety goals are still given highest priority when interactions with other road users take place and when interacting with a traffic light. Additionally, performance on the fuel saving goal diminished for the group that had to manage fuel saving and time saving together. The theoretical implications for a goal hierarchy in driving tasks and practical implications for eco-driving are discussed. 相似文献
23.
Varank G Demir A Top S Sekman E Akkaya E Yetilmezsoy K Bilgili MS 《The Science of the total environment》2011,409(17):3183-3196
Four identical pilot-scale landfill reactors with different alternative composite liners were simultaneously operated for a period of about 540 days to investigate and to simulate the migration behaviors of phenolic compounds (phenol, 2-CP, 2-MP, 3-MP, 4-MP, 2-NP, 4-NP, 2,4-DNP, 2,4-DCP, 2,6-DCP, 2,4,5-TCP, 2,4,6-TCP, 2,3,4,6-TeCP, PCP) and heavy metals (Pb, Cu, Zn, Cr, Cd, Ni) from landfill leachate to the groundwater. Alternative landfill liners of four reactors consist of R1: Compacted clay liner (10 cm + 10 cm, k = 10−8 m/sn), R2: Geomembrane (2 mm HDPE) + compacted clay liner (10 cm + 10 cm, k = 10−8 m/sn), R3: Geomembrane (2 mm HDPE) + compacted clay liner (10 cm, k = 10−8 m/sn) + bentonite liner (2 cm) + compacted clay liner (10 cm, k = 10−8 m/sn), and R4: Geomembrane (2 mm HDPE) + compacted clay liner (10 cm, k = 10−8 m/sn) + zeolite liner (2 cm) + compacted clay liner (10 cm, k = 10−8 m/sn). Wastes representing Istanbul municipal solid wastes were disposed in the reactors. To represent bioreactor landfills, reactors were operated by leachate recirculation. To monitor and control anaerobic degradation in the reactors, variations of conventional parameters (pH, alkalinity, chloride, conductivity, COD, TOC, TKN, ammonia and alcaly metals) were also investigated in landfill leachate samples. The results of this study showed that about 35-50% of migration of organic contaminants (phenolic compounds) and 55-100% of migration of inorganic contaminants (heavy metals) to the model groundwater could be effectively reduced with the use of bentonite and zeolite materials in landfill liner systems. Although leachate contaminants can reach to the groundwater in trace concentrations, findings of this study concluded that the release of these compounds from landfill leachate to the groundwater may potentially be of an important environmental concern based on the experimental findings. 相似文献
24.
Sakine Yaln E Ebru Onbalar Zehra Reisli Suzan Yaln 《Journal of the science of food and agriculture》2006,86(9):1336-1339
This study was conducted to investigate the effects of garlic powder on the performance, egg traits and blood parameters of laying hens. One hundred and sixty‐two SHSY‐type brown layers aged 21 weeks were chosen at random from a large flock. They were allocated to three dietary treatments. Each treatment comprised six replicates of nine layers in groups of three. The diets were supplemented with 0, 5 and 10 g kg?1 garlic powder. The experimental period lasted 22 weeks. Garlic powder addition did not significantly affect body weight, egg production, feed consumption, feed efficiency, egg shell index, egg breaking strength, egg shell thickness, egg albumen index, egg yolk index, egg Haugh unit, egg yolk weight and serum protein concentration. Egg weight increased (P < 0.01) with garlic powder supplementation. There was a significant (P < 0.01) reduction in egg cholesterol concentration as mg g?1 yolk when the dietary level of garlic powder was increased from 0 to 10 g kg?1. Hen serum triglyceride (P < 0.05) and total cholesterol (P < 0.01) concentrations decreased with garlic powder supplementation. This study demonstrated that garlic powder addition increased egg weight and decreased egg yolk cholesterol concentration (mg g?1 yolk) and serum triglyceride and cholesterol concentrations without adverse effects on performance and egg traits. Copyright © 2006 Society of Chemical Industry 相似文献
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Gözde Eksioglu Cetintahra Ebru Cubukcu 《Journal of Housing and the Built Environment》2015,30(2):331-340
Previous studies on house prices tend to focus on parameters such as location, size and view. Such studies ignored the influence of environmental aesthetics on house prices. Considering the scientific evidence that showed a significant effect of environmental aesthetic on people’s environmental preference and behaviour, this study aims to investigate the influence of environmental aesthetic on estimated house prices. Twelve computer-simulated residential environments were created. Computer-simulated images vary on three categories to manipulate complexity and coherence along a street: (1) building location (attached, detached and both), (2) building height (same and different) and (3) building setback (same and different). Forty-seven university students viewed the computer-simulated environments and answered questions to evaluate aesthetic and economic values of each street. For the aesthetic value, participants evaluated the extent to which the environment is arousing, pleasant, exciting, relaxing, complex, coherent and safe. For the economic value, participants estimated market price (for sale and for rent) of a specific apartment on a computer simulation of a residential street. Results showed that estimated sale price was influenced by excitement, coherence and pleasantness; estimated rental price was influenced by complexity, arousal, coherence and pleasantness. This study aimed to pave the way for such studies by introducing an inspiring methodology and highlighting the importance of environmental aesthetics on house prices. Moreover, the findings have applied value for planners, urban designers and real estate agents. 相似文献
29.
Yusuf Tansel Ic Ebru Saraloğlu Güler Ceren Cabbaroğlu Ezgi Dilan Yüksel Huri Maide Sağlam 《国际生产研究杂志》2018,56(11):4035-4055
Modern manufacturing systems are faced with the challenge of reducing the carbon emission related to manufacturing technologies. Machining centres consume large amounts of energy and as a consequence; carbon emissions are generated owing to this consumption. This paper presents a design of experiment work related to the optimisation of machining factors in the turning process of aluminium alloys. Carbon emission and surface quality were concurrently optimised. A set of experimental scenarios was set using a Box–Behnken design and the response surface methodology was applied to get the regression model for the carbon emission and surface roughness during turning process. The relationship between factors and the responses (carbon emission and surface quality) was investigated using surface plots. Furthermore, the desirability function method using the Response Optimizer tool in MINITAB and goal programming methodology was used to obtain the values of the parameters that achieved minimum surface roughness and a minimum quantity of carbon emission. 相似文献
30.
Efe Boran Ebru Özgür Meral Yücel Ufuk Gündüz Inci Eroglu 《International Journal of Hydrogen Energy》2012
In this study, a pilot solar tubular photobioreactor was successfully implemented for fed batch operation in outdoor conditions for photofermentative hydrogen production with Rhodobacter capsulatus (Hup−) mutant. The bacteria had a rapid growth with a specific growth rate of 0.052 h−1 in the batch exponential phase and cell dry weight remained in the range of 1–1.5 g/L throughout the fed batch operation. The feeding strategy was to keep acetic acid concentration in the photobioreactor at the range of 20 mM by adjusting feed acetate concentration. The maximum molar productivity obtained was 0.40 mol H2/(m3 h) and the yield obtained was 0.35 mol H2 per mole of acetic acid fed. Evolved gas contained 95–99% hydrogen and the rest was carbon dioxide by volume. 相似文献