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排序方式: 共有137条查询结果,搜索用时 15 毫秒
1.
Mary S Patil GV Kulkarni AV Kulkarni MJ Joshi SR Mehendale SS Giri AP 《Proteomics. Clinical applications》2012,6(1-2):79-90
The coevolution of genomics and proteomics has led to advancements in the field of diagnosis and molecular mechanisms of disease. Proteomics is now stepping into the field of obstetrics, where early diagnosis of pregnancy complication such as preeclampsia (PE) is imperative. PE is a multifactorial disease characterized by hypertension with proteinuria, which is a leading cause of maternal and neonatal morbidity and mortality occurring in 5-7% of pregnancies worldwide. This review discusses the probable molecular mechanisms that lead to PE and summarizes the proteomics research carried out in understanding the pathogenicity of PE, and for identifying the candidate biomarker for diagnosis of the disease. 相似文献
2.
Georges Akhras Gouri Dhatt 《International journal for numerical methods in engineering》1976,10(4):787-797
An automatic algorithm is presented for reducing the bandwidth of symmetric sparse connectivity matrices. The procedure takes an arbitrary input sequence and creates an optimal bandwidth for complex network systems by renumbering the node labels. Thus, considerable improvement for computer storage and time is achieved in the solution of the systems. A large number of examples is presented to demonstrate the reliability and the efficiency of the method. 相似文献
3.
S. Sridhar B. Smitha Satyajai Mayor B. Prathab T. M. Aminabhavi 《Journal of Materials Science》2007,42(22):9392-9401
Interfacial polymerization technique has been widely employed to prepare reverse osmosis (RO) and nanofiltration (NF) membranes.
The present study explores the possibility of preparing a polyamide membrane by interfacial polymerization and its utilization
for the separation of CO2 and H2S from CH4. A novel ultraporous substrate of polysulfone (PSF) was prepared by phase inversion technique from a solution containing
18% PSF and 4% propionic acid in dimethyl formamide (DMF) solvent. Thin film composite (TFC) polyamide membrane was synthesized
on PSF substrate from the reaction between meta-phenylene diamine in an aqueous media and isophthaloyl chloride in hexane. The membrane prepared was characterized by Fourier
transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC) and scanning electron
microscopy (SEM) to study intermolecular interactions, crystallinity, thermal stability and surface morphology, respectively.
Gas permeabilities of pure CO2, H2S, CH4, O2, and N2 gases were measured using the indigenously built permeation cell incorporated into a high-pressure gas separation manifold.
At the feed pressure of 1 MPa, the membrane exhibited permeances of 15.2 GPU for CO2 and 51.6 GPU for H2S with selectivities of 14.4 and 49.1 for CO2/CH4 and H2S/CH4 systems, respectively. The observed N2 permeance of 0.95 GPU was close to that of CH4. The corresponding O2 permeance was 5.13 GPU with a reasonably high O2/N2 selectivity of 5.4. The effect of feed pressure on polyamide membrane performance was examined. Further, molecular dynamics
(MD) simulations were employed to compute the cohesive energy density (CED), solubility parameter (δ) and sorption of CO2, H2S, CH4, O2, and N2 gases in polyamide membrane to corroborate theoretical study with experimentally determined gas transport properties. 相似文献
4.
Smitha Janardan Yu Tomita Mauricio Gutiérrez Kenneth R. Brown 《Quantum Information Processing》2016,15(8):3065-3079
We estimate the success probability of quantum protocols composed of Clifford operations in the presence of Pauli errors. Our method is derived from the fault-point formalism previously used to determine the success rate of low-distance error correction codes. Here we apply it to a wider range of quantum protocols and identify circuit structures that allow for efficient calculation of the exact success probability and even the final distribution of output states. As examples, we apply our method to the Bernstein–Vazirani algorithm and the Steane [[7,1,3]] quantum error correction code and compare the results to Monte Carlo simulations. 相似文献
5.
Ashith V.K. Gowrish K. Rao Smitha R. Sahana N. Moger 《Ceramics International》2018,44(15):17623-17629
The TiO2 films were obtained from successive ion layer adsorption and reaction (SILAR) method. A micro-controller based SILAR unit was used to precisely monitor and control the deposition parameters. The films were uniform and free from physical defects such as pores and cracks. A maximum thickness of about 700?nm was achieved. The films were found to be polycrystalline without any texture or preferred orientations. The crystallite size of the films was found to increase with thickness while the micro strain and stress were found to reduce with the thickness. Post-deposition annealing was also found to produce the similar results. The films were found to possess an indirect bandgap of about 3?eV. Various technically important parameters such as root-mean-square micro strain, Urbach energy, chemical composition, carrier concentration, electrical resistivity etc. were determined. The effects of deposition parameters on the properties of the films is discussed in detail. 相似文献
6.
Advances in nanophotonics have shown the potential of colloidal metal nanoparticles with sharp tips, such as rods, to focalize plasmonic electromagnetic fields. We report on the synthesis of Au nanorods via a seed mediated approach and the influence of silver ions on the aspect ratio of the Au nanorods. The longitudinal surface plasmon resonance (LSPR) of the Au nanorods was successfully tuned with the concentration of silver ions. The surface enhanced Raman scattering (SERS) effect of 2-aminothiophenol (2-ATP) as a probe molecule on Au nanorods was systematically studied by varying the longitudinal surface plasmon resonance of the nanorods. The highest electromagnetic enhancement was observed when the longitudinal surface plasmon resonance of the Au nanorods overlapped with the laser excitation wavelength. The variation of the SERS enhancement factor with the longitudinal surface plasmon resonance and laser excitation lines is also discussed in detail. 相似文献
7.
Aluminum nitride and oxy-nitride thin films have been deposited on Si(100) substrates at temperatures of 300-350K by gas-phase
excimer laser photolysis at 193 nm. The precursors used for this deposition process are trimethylamine alane and ammonia.
The properties of these laser-deposited films were studied using scanning electron microscopy, energy dispersive x-ray analysis,
and x-ray diffraction. X-ray photoelectron spectroscopy has been extensively used to provide information regarding the chemical
compositions on the surface and in the bulk of these laser deposited films, as well as on the chemical states of the components
of the films. Well-adhering, smooth, amorphous films of AlN are obtained at a substrate temperature of 350K using this technique. 相似文献
8.
Smitha Biduru Sundergopal Sridhar G Suryanarayana Murthy Satyajai Mayor 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2005,80(12):1416-1424
Membranes made from 84% deacetylated chitosan biopolymer were cross‐linked by a novel method using 2,4‐toluylene diisocyanate (TDI) and tested for the separation of t‐butanol/water mixtures by pervaporation. The unmodified and cross‐linked membranes were characterized by Fourier transform infra red (FTIR) spectroscopy, X‐ray diffraction (XRD) studies and sorption studies in order to understand the polymer–liquid interactions and separation mechanisms. Thermal stability was analyzed by differential scanning calorimetry (DSC) and thermo gravimetric analysis (TGA) while tensile strength measurement was carried out to assess mechanical strength. The membrane appears to have good potential for breaking the aqueous azeotrope of 88.2 wt% t‐butanol by giving a high selectivity of 620 and substantial water flux (0.38 kg m?2 hr?1). The effects of operating parameters such as feed composition, membrane thickness and permeate pressure on membrane performance were evaluated. Copyright © 2005 Society of Chemical Industry 相似文献
9.
A differentiation between free carboxyl and various lactone groups in oxycelluloses was carried out based on the variation in their reaction rates with KI–KIO3 solution. An attempt has been made to identify the various lactone groups present by comparison of the results of different oxycelluloses as well as study on some model compounds. A characteristic and group spectrum was determined for each oxycellulose. On blocking the free carboxyl groups by zinc acetate treatment, the results for the nature and amounts of various lactones present are in good agreement with the results for oxycelluloses themselves. Sodium borohydride treatment for 120 hr has been found to be incapable of reducing all the lactones present. An appreciable decrease in the value for glucono-δ-lactone was observed, whiles glucuronic acid lactone was only partially attacked. Treatment with chlorous acid resulted in an increase in the values for free carboxyl as well as lactones for all oxycelluloses. 相似文献
10.
The effect of addition of elastomeric modifiers on the adhesive properties like lap shear strength and T‐peel strength of an addition curable, maleimide functional novolac phenolic resin (PMF), self‐cured and cocured with a novolac epoxy resin, was studied using aluminium adherends. The modifiers used were (1) two grades of carboxyl terminated butadiene acrylonitrile copolymer (CTBN) of different molecular weights, (2) a low molecular weight, epoxidized hydroxyl‐terminated polybutadiene, and (3) a high molecular weight acrylate terpolymer containing pendant epoxy functionality. The adhesive properties, when examined as a function of the varying concentrations of the additives, ranging from 10 to 30 parts per hundred parts (phr) of the resin, were found to depend on the nature of the matrix being modified as well as on the nature and concentration of the elastomer. The adhesive properties at ambient temperature of the self‐cured, highly brittle PMF resin were dramatically improved by the inclusion of all the elastomers, the increase being substantial in the case of high molecular weight CTBN. For the more rigid, less ductile, epoxy‐cured PMF system, the adhesive properties were marginally improved by the high molecular weight CTBN, whereas the other elastomers were practically ineffective. For both self‐cured and epoxy‐cured PMF systems, the inclusion of these elastomers generally decreased the high‐temperature adhesive properties, implying impairment of thermal characteristics, evidenced also from their dynamic mechanical spectra. The presence of phase‐separated elastomer particles in the modified systems has been evidenced from scanning electron micrographs. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 2321–2332, 1999 相似文献