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排序方式: 共有123条查询结果,搜索用时 15 毫秒
1.
M Yazdanbakhsh WA Paxton YC Kruize E Sartono A Kurniawan A van het Wout ME Selkirk F Partono RM Maizels 《Canadian Metallurgical Quarterly》1993,167(4):925-931
To establish the relationships among T and B cell responses, active infection, and clinical manifestations in lymphatic filariasis, filarial-specific lymphocyte proliferation, IgG antibody isotypes, and IgE levels were determined in an exposed population: 31 asymptomatic amicrofilaremics, 43 microfilaremics, 12 symptomatic amicrofilaremics, and 52 elephantiasis patients. Lymphocyte proliferation was higher in elephantiasis patients and asymptomatic amicrofilaremics than in microfilaremics (P < .004). A proportion of asymptomatic amicrofilaremics (32%), elephantiasis patients (37%), and symptomatic amicrofilaremics (58%) showed antigen-specific lymphocyte unresponsiveness, and lymphocyte proliferation to filarial antigens correlated negatively with specific IgG4 levels (rho = -0.315, P < .001). As elevated specific IgG4 is an indicator of active infection, it is argued that active infection may result in lymphocyte hyporesponsiveness irrespective of clinical category. Of those with elevated specific IgE levels and high T cell proliferative responses, 70% had elephantiasis, suggesting these factors have a role in pathology. However, the existence of a proportion of elephantiasis patients with low anti-filarial IgE and T cell unresponsiveness to filarial antigens suggests that elephantiasis can be caused by distinct processes. 相似文献
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Eiman Kanjo Steve Benford Mark Paxton Alan Chamberlain Danae Stanton Fraser Dawn Woodgate David Crellin Adrain Woolard 《Personal and Ubiquitous Computing》2008,12(8):599-607
Mobile sensing and mapping applications are becoming more prevalent because sensing hardware is becoming more portable and
more affordable. However, most of the hardware uses small numbers of fixed sensors that report and share multiple sets of
environmental data which raises privacy concerns. Instead, these systems can be decentralized and managed by individuals in
their public and private spaces. This paper describes a robust system called MobGeoSens which enables individuals to monitor
their local environment (e.g. pollution and temperature) and their private spaces (e.g. activities and health) by using mobile
phones in their day to day life. The MobGeoSen is a combination of software components that facilitates the phone’s internal
sensing devices (e.g. microphone and camera) and external wireless sensors (e.g. data loggers and GPS receivers) for data
collection. It also adds a new dimension of spatial localization to the data collection process and provides the user with
both textual and spatial cartographic displays. While collecting the data, individuals can interactively add annotations and
photos which are automatically added and integrated in the visualization file/log. This makes it easy to visualize the data,
photos and annotations on a spatial and temporal visualization tool. In addition, the paper will present ways in which mobile
phones can be used as noise sensors using an on-device microphone. Finally, we present our experiences with school children
using the above mentioned system to measure their exposure to environmental pollution.
相似文献
Adrain WoolardEmail: |
4.
Paxton Juuti Anssi Arffman Antti Rostedt Juha Harra Jyrki M. Mäkelä Jorma Keskinen 《Aerosol science and technology》2016,50(5):487-496
A new instrument, density monitor (DENSMO), for aerosol particle size distribution characterization and monitoring has been developed. DENSMO is operationally simple and capable of measuring the effective density as well as the aerodynamic and the mobility median diameters with a time resolution of 1 s, from unimodal particle size distributions. The characterization is performed with a zeroth order mobility analyzer in series with a low pressure impactor and a filter stage. The operation of DENSMO was investigated with sensitivity analysis and, based on the results, optimal operation parameters were determined. DENSMO was also compared, in lab test measurements, against a reference method with several particle materials with bulk densities from 0.92 to 10.5 g/cm3. The results show that the deviation from the reference method was less than 25% for suitable materials.
Copyright © 2016 American Association for Aerosol Research 相似文献
5.
The changing scene in steel 总被引:1,自引:0,他引:1
H. W. Paxton 《Metallurgical and Materials Transactions A》1979,10(12):1815-1829
In the past thirty years the United States has moved from a position where it dominated world steel production to where it
is now only one of the major world steel producers. The interplay of technology, economics and world politics which has brought
this about will be reviewed, with particular emphasis on important technological changes which have occurred in the last three
decades. To illustrate how research, development and application interacted to bring about change, specific examples will
be given in ore reduction, continuous casting and high-strength steel products.
The Edward DeMille Campbell Memorial Lecture was established in 1926 as an annual lecture in memory of and in recognition
of the outstanding scientific contributions to the metallurgical profession by a distinguished educator who was blind for
all but two years of his professional life. It recognizes demonstrated ability in metallurgical science and engineering.
H. W. PAXTON is Vice President-Research of the United States Steel Corporation. He received a B.Sc. and M.Sc. in 1947 and
1948 from the University of Manchester and his Ph.D. in 1952 from the University of Birmingham. In 1953 he became Assistant
Professor of Metallurgical Engineering at Carnegie Institute of Technology, subsequently Carnegie-Mellon University, and became
Head of the Department of Metallurgy and Materials Science and Director of the Metals Research Laboratory of Carnegie-Mellon
in 1966. He was Visiting Professor in Metallurgy and Materials Science at Imperial College, London, in 1962–63 and at the
Massachusetts Institute of Technology in 1970, and served two years as the first Director, Division of Materials Research,
National Science Foundation 1971–1973. He was a consultant to industry from 1953 to 1974 and has authored many technical papers,
primarily in the field of physical metallurgy. He also co-authored a book,Alloying Elements in Steel, with the late Dr. E. C. Bain. Dr. Paxton received the Bradley Stoughton Award for young teachers of metallurgy in 1960.
He is a member of the American Association for the Advancement of Science, Directors of Industrial Research, and the Industrial
Research Institute; Fellow of the American Society for Metals and The Metallurgical Society of AIME; Past President of TMS;
Vice President of the American Institute of Mining Metallurgical, and Petroleum Engineers; Past Chairman of the General Research
committee of the American Iron and Steel Institute, and was elected to membership of the National Academy of Engineering on
April 3, 1978. 相似文献
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7.
J. M. Dinwoodie J. -A. Higgins B. H. Paxton D. J. Robson 《Holz als Roh- und Werkstoff》1990,48(1):5-10
Over the last fifteen years an extensive programme of work on quantifying and predicting creep behaviour of particleboard has been undertaken. This paper first sets out some of the philosophy underlying the selection of test methodology used, and then proceeds to summarise and highlight the principal results obtained under both steady- and unsteady-state environments. Very strong interactions were found in the analysis of variable influencing creep behaviour. The reasons for adopting rheological models as predictive tools are discussed and the merits of a 5-parameter model are illustrated. A 4-parameter model is used to obtain the relative proportions of the three components of creep deflection under different conditions: this procedure clearly demonstrates the significant role of the viscous component in determining creep deflection at high levels of stress and relative humidity. 相似文献
8.
Jari Juuti Merja Teirikangas Kensaku Sonoda Heli Jantunen 《International Journal of Applied Ceramic Technology》2010,7(4):452-460
Magnetic and electrical properties of thermoplastic ceramic-polymer 0–3 composites with Z-type hexaferrite, and MnZn ferrite inclusions were investigated. The complex permeability and permittivity were measured up to 1 GHz where maximum values of ɛ′r=30.47 and μ′r=4.32 and ɛ′r=10.95 and μ′r=1.80 were obtained for MnZn-ER182 and Co2Z-ER182 composites with ∼44.7 vol% and 43.0 vol% filler loadings, respectively. MnZn and Co2Z composites exhibit miniaturization factors as low as 0.09 and 0.23, together with reduced magnetic losses and frequency dispersion. The results indicate that the composites offer novel possibilities for wider feasible frequency bandwidth and adjustable impedance matching and magnetic and dielectric properties. 相似文献
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