全文获取类型
收费全文 | 155篇 |
免费 | 21篇 |
国内免费 | 2篇 |
专业分类
电工技术 | 3篇 |
综合类 | 5篇 |
化学工业 | 64篇 |
金属工艺 | 5篇 |
机械仪表 | 7篇 |
建筑科学 | 1篇 |
矿业工程 | 2篇 |
能源动力 | 10篇 |
轻工业 | 10篇 |
无线电 | 18篇 |
一般工业技术 | 25篇 |
冶金工业 | 9篇 |
自动化技术 | 19篇 |
出版年
2023年 | 3篇 |
2022年 | 4篇 |
2021年 | 12篇 |
2020年 | 12篇 |
2019年 | 15篇 |
2018年 | 17篇 |
2017年 | 14篇 |
2016年 | 16篇 |
2015年 | 11篇 |
2014年 | 14篇 |
2013年 | 14篇 |
2012年 | 16篇 |
2011年 | 12篇 |
2010年 | 6篇 |
2009年 | 2篇 |
2008年 | 3篇 |
2007年 | 1篇 |
2006年 | 1篇 |
2005年 | 2篇 |
1995年 | 2篇 |
1981年 | 1篇 |
排序方式: 共有178条查询结果,搜索用时 15 毫秒
81.
Poursaeidi Esmaeil Kavandi Amin Torkashvand Kaveh 《Journal of Failure Analysis and Prevention》2018,18(6):1607-1615
Journal of Failure Analysis and Prevention - A creep–fatigue crack growth on the outer surfaces of a turbine casing was assessed, and the turbine casing’s overall lifetime was... 相似文献
82.
Payman Nayebi Esmaeil Zaminpayma 《Fullerenes, Nanotubes and Carbon Nanostructures》2020,28(11):886-890
AbstractGraphene device electronic properties with double vacancy (DV) defects for two cases, along the direction and perpendicular to the current pathways graphene device, were investigated by using the first principles calculations in combination with density functional theory. The bond lengths, density of states, transmission probability, and current-voltage curves are computed. For relaxed pristine graphene the bond length is around 1.43?Å. However, the bond lengths near the defects for relaxed graphene for DV case are modified to 1.40-1.49?Å. It is also observed that I???V graph is nonlinear based on the current-voltage curve of graphene device which contain DV defects. Furthermore, it has been shown that having the DV defects lead to reduce the current relative to the case of perfect graphene device. Moreover, we noted that when the voltage is increased from zero to one volt new peaks are created near Fermi level in the transmission spectrum graphs. In addition, we noted that the current for the vertical DV defect is smaller than the pristine and horizontal DV device because the number of blocked electrons current pathways in vertical DV defect is larger than the two other cases, namely the pristine and horizontal DV defect cases The obtained results can be useful for the construction of new nanoelectronic devices and may have practical applications. 相似文献
83.
Dynamic virtual machine (VM) consolidation is one of the emerging technologies that has been considered for low-cost computing in cloud data centers. Quality-of-service (QoS) assurance is one of the challenging issues in the VM consolidation problem since it is directly affected by the increase of resource utilization due to the consolidations. In this paper, we take advantage of Markov chain models to propose a novel approach for VM consolidation that can be used to explicitly set a desired level of QoS constraint in a data center to ensure the QoS goals while improving system utilization. For this purpose, an energy-efficient and QoS-aware best fit decreasing algorithm for VM placement is proposed, which considers QoS objective when determining the location of a migrating VM. This algorithm employs an online transition matrix estimator method to deal with the nonstationary nature of real workload data. We also propose new policies for detecting overloaded and underloaded hosts. The performance of our proposed algorithms is evaluated through simulations. The results show that the proposed VM consolidation algorithms in this paper outperforms the benchmark algorithms in terms of energy consumption, service-level agreement violations, and other cost factors. 相似文献
84.
Quantitation of limonin in Iranian orange juice concentrates using high-performance liquid chromatography and spectrophotometric methods 总被引:3,自引:0,他引:3
Soleiman Abbasi Parvin Zandi Esmaeil Mirbagheri 《European Food Research and Technology》2005,221(1-2):202-207
Bitterness is a major problem in the citrus industry worldwide, and is mostly due to the presence of limonoid compounds, especially limonin. In this study, the limonin content of orange juice concentrates from three active factories in west Mazandaran province, after reconstitution, was assayed using high-performance liquid chromatography (HPLC) and spectrophotometric methods. With HPLC, employing acetonitrile/water (v/v) (32:68) with a flow rate of 0.9 ml/min at =207 nm, the limonin content was in the range 11.7–23.3 g/ml with a mean ± standard deviation (SD) of 18.5±3.6 g/ml. Spectrophotometric measurement of limonin at 503 nm with Burnham reagent gave a range of 9.9–21.8 g/ml with a mean ± SD of 17.16±4.1 g/ml. The correlation coefficients of the detector linear response for the limonin standard (0–50 g/ml) for HPLC and spectrophotometry were 0.995 and 0.989, respectively. The percentages of limonin recovery with and without sample addition were 101.02–111.40 and 93.0–100.8, respectively, for HPLC. The percentages of limonin recovery for the spectrophotometric method resulted in 95.6–101.8 for limonin-added samples. The precision factors for the two assay methods were ±2.10% and ±1.69, respectively. The correlation coefficient of the two methods was 0.84. Sensory evaluation of the reconstituted samples from the view point of bitterness confirmed 85% of the results of the analytical methods. This study recommends spectrophotometric analysis as a useful and suitable method for quantitation of limonin in the quality control laboratories of orange juice plants. 相似文献
85.
Pourkabirian Azadeh Dehghan Takht Fooladi Mehdi Zeinali Khosraghi Esmaeil Rahmani Amir Masoud 《Wireless Personal Communications》2019,104(1):217-233
Wireless Personal Communications - A set of moving nodes communicating with each other without any infrastructure is considered a mobile ad hoc network (MANET). Stability is a big problem with this... 相似文献
86.
A stochastic process-based server consolidation approach for dynamic workloads in cloud data centers
Monshizadeh Naeen Hossein Zeinali Esmaeil Toroghi Haghighat Abolfazl 《The Journal of supercomputing》2020,76(3):1903-1930
The Journal of Supercomputing - With the development of information technology, there is a need for computational works everywhere and every time. Thus, people should be able to carry out their... 相似文献
87.
Leslie Poh Benke Li Wei Yu Esmaeil Narimissa Manfred H. Wagner 《Polymer Engineering and Science》2021,61(4):1077-1086
The hierarchical multi-mode molecular stress function (HMMSF) model developed by Narimissa and Wagner [Rheol. Acta 54, 779–791 (2015), and J. Rheol. 60, 625–636 (2016)] for linear and long-chain branched (LCB) polymer melts were used to analyze the set of transient elongational and shear viscosity data of two LCB low-density polyethylenes (1840H and 2426 k), and a linear poly-(ethylene-co-α-butene), PEB A-780090 as reported by [Li et al. J. Rheol. 64, 177 (2020)], who had developed a new horizontal extensional rheometer to extend the lower limits of elongational viscosity measurements of polymer melts. Comparison between model predictions and elongational stress growth data reveals excellent agreement within the experimental window, and good consistency with shear stress growth data, based exclusively on the linear-viscoelastic relaxation spectrum and only two nonlinear model parameters, the dilution modulus GD for extensional flows, and in addition a constraint release parameter for shear flow. 相似文献
88.
89.
The effect of agarose content on the morphology,phase evolution,and magnetic properties of CoFe2O4 nanoparticles prepared by sol‐gel autocombustion method 下载免费PDF全文
Amir Reza Rouhani Amir Hossein Esmaeil‐Khanian Fatemeh Davar Saeed Hasani 《International Journal of Applied Ceramic Technology》2018,15(3):758-765
Hard‐magnetic CoFe2O4 nanoparticles were produced with the sol‐gel autocombustion route using agarose and citric acid as a neutral organic gel and combustion agent. For this purpose, the obtained gel is annealed at 800°C for 3 hours and then the spinel structure of the samples was confirmed by X‐ray diffraction (XRD). In addition, the existence of metal‐oxygen complexes in the gel and nanoparticles was investigated by Fourier transformation infrared (FTIR) spectra. Furthermore, FESEM images showed that semispherical and rod‐like particles were obtained by variation in agarose contents. For the rod‐like sample with 2.5 g agarose, the saturation magnetization and coercivity were measured equal to 71.7 emu/g and 10076.84 Oe, respectively. 相似文献
90.
Mullite‐glass and mullite‐mullite interfaces: Analysis by molecular dynamics (MD) simulation and high‐resolution TEM 下载免费PDF全文
Esmaeil Adabifiroozjaei Judy N. Hart Pramod Koshy David R. G. Mitchell Charles C. Sorrell 《Journal of the American Ceramic Society》2018,101(1):428-439
The properties of mullite‐glass and mullite‐mullite interfaces have been investigated at 1800 K by molecular dynamics (MD) simulation and high‐resolution TEM. The simulation showed that mullite‐glass interfaces typically have much lower interfacial energies than mullite‐mullite interfaces, which results from the structural flexibility of the glass and associated accommodation of interfacial mismatch. The (110)‐glass interface has the lowest energy of all interfaces studied, which is consistent with the observed dominance of this interface in experimental mullite‐glass samples examined by TEM. The simulation shows that the interfacial energies of the (100)‐glass and (010)‐glass interfaces are higher than that those of the (001)‐glass interface, so [100] and [010] would be expected to be the dominant growth directions. However, the growth of mullite in glass occurs predominantly in the [001] direction. This apparent discrepancy can be explained by the fact that growth in the [100] and [010] directions is limited by the slow growth of (110) plane (i.e., [110] direction), which facilitates [001] growth, which is confirmed by the TEM data. 相似文献