全文获取类型
收费全文 | 308篇 |
免费 | 6篇 |
专业分类
电工技术 | 12篇 |
综合类 | 1篇 |
化学工业 | 52篇 |
金属工艺 | 11篇 |
机械仪表 | 7篇 |
建筑科学 | 4篇 |
能源动力 | 5篇 |
轻工业 | 19篇 |
水利工程 | 2篇 |
无线电 | 30篇 |
一般工业技术 | 69篇 |
冶金工业 | 79篇 |
原子能技术 | 12篇 |
自动化技术 | 11篇 |
出版年
2022年 | 2篇 |
2021年 | 4篇 |
2020年 | 2篇 |
2019年 | 4篇 |
2018年 | 4篇 |
2017年 | 4篇 |
2016年 | 6篇 |
2015年 | 2篇 |
2014年 | 3篇 |
2013年 | 11篇 |
2012年 | 7篇 |
2011年 | 8篇 |
2010年 | 4篇 |
2009年 | 15篇 |
2008年 | 13篇 |
2007年 | 11篇 |
2006年 | 9篇 |
2005年 | 10篇 |
2004年 | 11篇 |
2003年 | 21篇 |
2002年 | 9篇 |
2001年 | 4篇 |
2000年 | 3篇 |
1999年 | 9篇 |
1998年 | 29篇 |
1997年 | 20篇 |
1996年 | 15篇 |
1995年 | 12篇 |
1994年 | 6篇 |
1993年 | 7篇 |
1992年 | 7篇 |
1991年 | 2篇 |
1990年 | 4篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1987年 | 3篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1983年 | 3篇 |
1982年 | 2篇 |
1981年 | 3篇 |
1980年 | 4篇 |
1979年 | 4篇 |
1978年 | 2篇 |
1976年 | 4篇 |
1969年 | 1篇 |
1965年 | 1篇 |
1963年 | 1篇 |
排序方式: 共有314条查询结果,搜索用时 0 毫秒
31.
Kubosawa H. Higaki N. Ando S. Takahashi H. Asada Y. Anbutsu H. Sato T. Sakate M. Suga A. Kimura M. Miyake H. Okano H. Asato A. Kimura Y. Nakayama H. Kimoto M. Hirochi K. Saito H. Kaido N. Nakagawa Y. Shimada T. 《Solid-State Circuits, IEEE Journal of》1999,34(11):1619-1626
A four-way very long instruction word (VLIW), 312-MHz geometry processor with peripheral component interconnect/accelerated graphic port bus bridge was implemented in a 0.21-μm, 2.5-V, three-layer-metal CMOS process. We adopted (1) a software bypass mechanism, (2) single-instruction multiple-data stream instructions, (3) four sets of floating-point multiply add and accumulate execution units, (4) special condition code registers and a branch condition generator for a clipping operation, and (5) automatic clock delay tuning methodology. As a result of these features, we achieved a performance of 2.5 GFLOPS and 6.5 million polygons per second for a three-dimensional geometry processor, which is the highest published performance as a single geometry processor. The processor is applicable to computer-aided-design systems that require very high graphics performance 相似文献
32.
33.
Sakai K. Miyai E. Sakaguchi T. Ohnishi D. Okano T. Noda S. 《Selected Areas in Communications, IEEE Journal on》2005,23(7):1335-1340
The possibility of single-mode oscillation over a large cavity area for photonic crystal lasers emitting at the photonic band edge has resulted in much interest in such materials for new forms of solid-state laser. In this paper, we measure the photonic bandstructure in our sample and identify the lasing band edge. By mapping out the bandstructure at the /spl Gamma/-point, we have observed fine structure at the band edge. The experimental results are in good agreement with the theoretically predicted bandstructure. Above threshold, we observe a lasing peak at 965 nm at one of the band edges. The far-field distribution of the laser is measured, showing an annular profile and azimuthal polarization. Calculations on the far-field distribution at the lasing band edge suggest the annular profile is due to an anti-symmetric resonant mode. 相似文献
34.
Long Preservation of AAV-Transduced Fluorescence by a Modified Organic Solvent-Based Clearing Method
Tao Lu Munehisa Shinozaki Narihito Nagoshi Masaya Nakamura Hideyuki Okano 《International journal of molecular sciences》2022,23(17)
The development of tissue clearing technologies allows 3D imaging of whole tissues and organs, especially in studies of the central nervous system innervated throughout the body. Although the three-dimensional imaging of solvent-cleared organs (3DISCO) method provides a powerful clearing capacity and high transparency, the rapid quenching of endogenous fluorescence and peroxide removal process decreases its practicability. This study provides a modified method named tDISCO to solve these limitations. The tDISCO protocol can preserve AAV-transduced endogenous EGFP fluorescence for months and achieve high transparency in a fast and simple clearing process. In addition to the brain, tDISCO was applied to other organs and even hard bone tissue. tDISCO also enabled us to visualize the long projection neurons and axons with high resolution. This method provides a fast and simple clearing protocol for 3D visualization of the AAV- transduced long projection neurons throughout the brain and spinal cord. 相似文献
35.
G Han T Chen J Yang J Dai R Xu Y Zhang J Okano R Yui H Nakajima T Hamasaki 《Canadian Metallurgical Quarterly》1996,21(10):591-4, 639
This paper reports the GC determination of 20 organochlorine pesticides in Chinese drugs Flos Ionicerae and Moluodan etc by the present method of Japan for determinaing pesticide residues. The results suggest that except Folium Isatidis, Radix Codonopsis and Sanqi Pian all accord with the for provisions pesticide residues in Japanese foodstuffs. 相似文献
36.
37.
R Sugita K Deguchi S Kimura S Harada Y Fujimaki H Watanabe M Naito T Nomura M Tanaka N Komatsu K Shimizu Y Yoshida K Okano 《Canadian Metallurgical Quarterly》1996,49(4):386-398
Clinical and bacteriological studies were carried out on cefditoren pivoxil (CDTR-PI) granule in infantile purulent acute otitis media treated at general practice settings and the following findings were obtained: 1. Two hundred forty eight strains were isolated from 210 patients, almost all of which (81.1%) harbored the following two strains: Streptococcus pneumoniae (42.3%) and Haemophilus influenzae (38.8%). Among S. pneumoniae, benzylpenicillin (PCG)-insensitive S. pneumoniae, (PISP) or PCG-resistant S. pneumoniae (PRSP) was 36.2%, corresponding to 15.3% of all the isolates and found in 18% of all patients. 2. The bacteria in the middle ear discharge and the nasopharyngeal swabs were correlated with conformity rate of more than 80% with regard to Streptococcus pyogenes, S. pneumoniae and H. influenzae but no Staphylococcus aureus was detected simultaneously from the two sources in any of the patients. S. aureus and coagulase-negative staphylococci (CNS) were considered to be contaminants that were originated from the external auditory meatus at the time of sampling. 3. Frequencies of isolation of S. pneumoniae from different age groups were higher in a lower age group between 0 and 4 years and those of PISP or PRSP had the similar tendency. 4. Antibacterial activities were determined for CDTR and related oral antibiotics against the strains of S. pneumoniae and H. influenzae as representative isolates. CDTR had stronger antibacterial activities against both bacteria than the reference antibiotics. CDTR was found to be transferred into the otorrhea at a mean concentration of 0.58 micrograms/ml after single administration of CDTR-PI granule formulation at 3 mg(potency)/kg. 5. As for bacterial eradication efficacies in the middle ear cavity and the nasopharynx, eradication rates were higher than 80% in the middle ear cavity in all cases without large differences among bacterial species but eradication rate of PISP was 30% in the nasopharynx, and it was significantly lower than those of PSSP and other bacteria. 6. In view of clinical effectiveness, the efficacy rate was 89.4% and bacteriological effects was 92.2%; in view of safety, adverse reactions were; observed in 9.5% and the rate of usefulness was 89.4%. 7. From above-stated results, CDTR-PI was considered as a useful oral antibiotic for infantile acute otitis media including PISP infections. 相似文献
38.
K Kataoka I Hisamitsu N Sayama T Okano Y Sakurai 《Canadian Metallurgical Quarterly》1995,117(6):1145-1147
From the standpoints of long-term stability and simple handling, a glucose sensor composed of totally synthetic sensing moieties should be of great advantage. This study was performed to demonstrate the feasibility of a novel glucose sensing system in an aqueous milieu based on a change in the fluorescence on competitive binding between a fluorescent diol compound and glucose toward a phenylborate compound. 6,7-Dihydroxy-4-methyl-coumarin (DHMC) was selected as a fluorophore, and 3-propionamidophenylboronic acid (PAPBA) as a phenylborate compound. The relationship between the glucose concentration and fluorescence intensity was linear in the range of 0 to 500 mg/dl of glucose. The availability of various derivatives of DHMC and phenylborate compounds allows the incorporation of these functionalities on the tip of an optical fiber to construct an opto-sensing system for glucose. 相似文献
39.
Taher Sharshar Kotoyuki Okano Yoichi Kawase 《Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms》1992,70(1-4):259-264
The basic characteristics of a N2-jet system coupled with a surface-ionization type ion source have been investigated at KUR-ISOL. The yields of transported activities and ionized ions have been measured under various conditions for both the He- and N2-jets. The effects of N2 gas upon the ionization and skimmer efficiency have been investigated. It was found that N2 gas has almost no effect upon the ionization efficiency, but causes poorer skimmer efficiency than He gas owing to the large opening angle of aerosol particles at the outlet of a capillary. A mixture of He and N2 gases was also tested. 相似文献
40.
Araki Masuyama Tomomichi Okano Mitsuo Okahara 《Journal of the American Oil Chemists' Society》1988,65(11):1830-1833
Amide oxime compounds have become of major interest because they can complex with uranium, gallium and various transition
metal ions. In this work surface active amide oximes were prepared to make some functions of the amide oxime group exhibit
as molecular aggregates in aqueous media. Amide oximes were obtained from nitriles which were prepared by the cyanoethylation
of alcohol ethoxylates with a monodispersed oligo(oxyethylene) group. Surface active properties of these compounds were measured
under various conditions and were compared with nonionics of the alcohol ethoxylate type. The pKa1 values of these amide oximes were about five, and they acted as cationic surfactants under acidic conditions and nonionic
ones under neutral and basic conditions. When they served as nonionics, the cloud point, CMC, γCMC and foaming properties of surface active amide oximes were similar to other alcohol ethoxylate nonionics. 相似文献