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排序方式: 共有186条查询结果,搜索用时 140 毫秒
51.
52.
Artificial immune algorithm for IIR filter design 总被引:4,自引:0,他引:4
Adem Kalinli Nurhan Karaboga 《Engineering Applications of Artificial Intelligence》2005,18(8):919-929
Over the recent years, several studies have been carried out by the researchers to describe a general, flexible and powerful design method based on modern heuristic optimisation algorithms for infinite impulse response (IIR) digital filters since these algorithms have the ability of finding global optimal solution in a nonlinear search space. One of the modern heuristic algorithms is the artificial immune algorithm which implements a learning technique inspired by human immune system. However, the immune system has not attracted the same kind of interest from researchers as other heuristic algorithms. In this work, an artificial immune algorithm is described and applied to the design of IIR filters, and its performance is compared to that of genetic and touring ant colony optimisation algorithms. 相似文献
53.
Michael Eisenmenger Nurhan Turgut Dunford 《Journal of the American Oil Chemists' Society》2008,85(1):55-61
Wheat germ oil (WGO) is a specialty product with a very high nutritional value. The chemical composition of both commercial
and pilot scale supercritical carbon dioxide (SC-CO2) processed WGO was examined. This study showed that methods used for oil extraction and refining did not have a significant
effect on the fatty acid composition of the oil. SC-CO2 extracted oil had a higher tocopherol content than that of commercially hexane extracted oil. The phospholipid content of
the SC-CO2 extracted oil was very low indicating that the SC-CO2 extraction method could eliminate the degumming step from edible oil refining processes. Although the conventional chemical
oil refining technique reduced the tocopherol content of the WGO, it was possible to concentrate tocopherols in WGO by using
physical refining methods such as molecular distillation.
Published with approval of the Director, Oklahoma Agricultural Experiment Station. 相似文献
54.
Michael Eisenmenger Nurhan T. Dunford Fred Eller Scott Taylor Jose Martinez 《Journal of the American Oil Chemists' Society》2006,83(10):863-868
There is a need for the development of new processing techniques to facilitate vegetable oil extraction and refining while
sustaining the nutritional components naturally present in edible oils and reducing the adverse impact of oil processing on
the environment. In this study supercritical carbon dioxide (SC−CO2) extraction and fractionation techniques were examined as alternative methods to obtain wheat germ oil (WGO) of high quality
and purity. It was shown that the SC−CO2 extraction technique is effective in extraction of WGO. There was no significant difference in the FA composition of SC−CO2- and hexane-extracted WGO. Both hexane-and SC−CO2-extracted WGO were rich in α-tocopherol. Moisture content of the SC−CO2-extracted oil was higher than that of the hexane-extracted oil. Solvent/feed ratio had a significant effect on the SC−CO2 extraction yields. This study demonstrated that supercritical fluid fractionation was a viable process to remove FFA efficiently
from both hexane-and SC−CO2-extracted WGO while retaining bioactive oil components in the final product. 相似文献
55.
Halime Serinçay Semiha Özkan Nurdane Yılmaz İbrahim Uslu Safa Gürcan 《Polymer-Plastics Technology and Engineering》2013,52(13):1308-1315
The incorporation of drugs into the dressings make these dressings antimicrobial and help in control of infection around the wound. The wound dressing materials based on PVA/PAA, ciprofloxacin HCl, and aloe vera have been designed and developed so that the wound undergoes proper healing and scar formation is minimal. These wound dressing materials are produced using the electrospinning method. The wound dressing materials are characterized using the FT-IR, DSC, DTA, TGA, and SEM techniques. The wound dressing materials are tested for microbial activity tests and drug release experiments. Controlled ciprofloxacin HCl release is observed. 相似文献
56.
In this work, a support vector machines (SVM) model for the small‐signal and noise behaviors of a microwave transistor is presented and compared with its artificial neural network (ANN) model. Convex optimization and generalization properties of SVM are applied to the black‐box modeling of a microwave transistor. It has been shown that SVM has a high potential of accurate and efficient device modeling. This is verified by giving a worked example as compared with ANN which is another commonly used modeling technique. It can be concluded that hereafter SVM modeling is a strongly competitive approach against ANN modeling. © 2007 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2007. 相似文献
57.
In this work, we investigate the some main electrical and photocurrent properties of the Au/PVA(Co-doped)/n-Si diodes by using current–voltage (I–V) measurements at dark and various illumination intensity. Two types of diodes with and without polyvinyl alcohol (PVA) (Co-doped) polymeric interfacial layer were fabricated and measured at room temperature. Results show that the polymeric interfacial layers and series resistance (Rs) strongly affect the main electrical parameters of these structures. Also, metal/polymer/semiconductor (MPS) diode with PVA (Co-doped) interfacial organic layer is very sensitive to the light such that the current in reverse bias region increase by 103–104 times with the increasing illumination intensity. The open circuit voltage Voc and short-circuit current Isc values of this MPS diode under 100 mW/cm2 illumination intensity were found as 0.28 V and 19.3 μA, respectively. 相似文献
58.
59.
Mehmet Musa Özcan Duygu İpek Kashif Ghafoor Fahad Al Juhaimi Nurhan Uslu Elfadil E. Babiker Isam A. Mohamed Ahmed Omer N. Alsawmahi 《International Journal of Food Science & Technology》2021,56(6):2780-2788
Development of novel snack foods is an important area of research, and different ingredients are being tested to develop and process new formulations. In this study, lupin chips prepared using different formulations (hulled lupin, whole lupin, wheat and corn flours) were cooked using baking and frying, and changes in the sensory and colour parameters, acrylamide contents, fat absorption, peroxide number and p-anisidine values of the final products were studied. Lupin flour significantly changed p-anisidine value of chips. Addition of lupin flour and cooking methods affected the colour, fat absorption and peroxide values. Significant differences in chemical properties of chips made from whole and hulled lupin flours were also observed. Acrylamide was not detected in all the formulations studied. The lupin chips have increased brightness (L*), no acrylamides, reduced peroxide and p-anisidine values and acceptable sensory quality; hence, this ingredient is recommendable for use in snack foods. 相似文献
60.
Muharrem Certel Mustafa Erbaş Mustafa K Uslu Mediha O Erbaş 《Journal of the science of food and agriculture》2007,87(7):1215-1218
Changes in water‐soluble vitamins were investigated in tarhana dough during fermentation and in tarhana stored under a variety of conditions for up to 6 months. The contents of riboflavin (P < 0.01), thiamin, niacin, vitamin B6 and folic acid (P < 0.05) increased significantly during fermentation. The thiamin, riboflavin, niacin, vitamin B6 and folic acid contents of tarhana dough were 4.80, 1.85, 7.68, 15.30 and 2.25 mg kg?1 respectively at the beginning of fermentation and increased to 10.15, 5.15, 24.04, 19.35 and 6.10 mg kg?1 respectively at the end of fermentation. Thiamin, riboflavin and folic acid contents were significantly affected (P < 0.01) by storage type and period, but niacin and vitamin B6 contents were not affected (P > 0.05). The water‐soluble vitamin contents of tarhana stored wet were higher than those of tarhana stored dry. Drying resulted in a 24% reduction in riboflavin content and an 86% reduction in folic acid content. Copyright © 2007 Society of Chemical Industry 相似文献