全文获取类型
收费全文 | 90篇 |
免费 | 4篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 43篇 |
金属工艺 | 1篇 |
机械仪表 | 4篇 |
建筑科学 | 4篇 |
能源动力 | 1篇 |
轻工业 | 9篇 |
无线电 | 2篇 |
一般工业技术 | 14篇 |
冶金工业 | 4篇 |
原子能技术 | 2篇 |
自动化技术 | 9篇 |
出版年
2022年 | 2篇 |
2021年 | 4篇 |
2019年 | 3篇 |
2018年 | 1篇 |
2016年 | 2篇 |
2015年 | 4篇 |
2014年 | 2篇 |
2013年 | 6篇 |
2012年 | 3篇 |
2011年 | 2篇 |
2010年 | 4篇 |
2009年 | 2篇 |
2008年 | 4篇 |
2007年 | 6篇 |
2006年 | 3篇 |
2005年 | 4篇 |
2004年 | 2篇 |
2003年 | 3篇 |
2002年 | 5篇 |
2001年 | 5篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1991年 | 4篇 |
1990年 | 3篇 |
1988年 | 1篇 |
1985年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
排序方式: 共有94条查询结果,搜索用时 15 毫秒
41.
坐落在东京的“S B·野泽”,其用地三面临街,四面均有一定的红线退让。建筑师试图在这一宁静的住宅区内,努力营造出优雅、得体的建筑品位。建筑中部为集中式布置的共享空间和交通核,外部用2.6m开间×两个柱距的基本空间体块为单元布置了15户住户。各种设备管线集中于外墙周边的管道井,使每个住户的浴室都能面向外部。建筑外部用双层的玻璃格栅包裹,各住户外墙均设计有60cm的挑檐外廊空间。这种兼顾控制视线、风、光功能的平板玻璃格栅窗的做法是在越南“空间体块河内样板间”的设计中积累下来的经验。依时间的不同,住户可将格栅任意开合。… 相似文献
42.
43.
Tatsuki Oda Masafumi Shirai Naoshi Suzuki Kazuko Motizuki 《Journal of Superconductivity and Novel Magnetism》1994,7(3):555-558
The lattice dynamics of an oxide spinel LiTi2O4 is studied by taking account of the electron-phonon (EP) interaction derived on the basis of the realistic tight-binding bands fitted to the first-principles bands. Due to the characteristic dependences of the EP interaction on wavevectors and vibrational modes, a remarkable frequency renormalization of the O vibrational modes, which hybridize with the Ti vibrational modes, is obtained over a wide region of the Brillouin zone. The overall features of the calculated phonon density of states are in agreement with those observed by the inelastic neutron scattering measurements. By using the EP interaction and the renormalized phonon frequencies we have calculated the EP spectral functionα 2 F(ω). The superconducting transition temperature, gap function, and tunneling spectra are calculated by solving the Éliashberg equation. The results agree well with the observations. 相似文献
44.
Socially assistive robots (SARs) are seen as part of a pragmatic solution to addressing the increasing demands, shortage of care workers and to realizing the potential of optimum integrated care. Yet their effectiveness and impact on older people’s care, activities and participation are still unknown. A total of 67 people aged 65 and over participated in a 24-week-long, quasi-experimental study in five residential nursing homes in Japan. The personalized care plan and targets were created based on the framework of the WHO’s International Classification of Function, Disability and Health (ICF). Three types of socially assistive robots were used. The participants in the robot intervention groups showed greater improvements in their scores for targeted activities and participation than the control group. Statistically significant improvements were observed in communication, self care, and social life. SARs have great potential for improving older people’s quality of life. With further research, the use of these robots by older people could be considered as a serious option in the future. In addition, the ICF framework can be utilized further for measuring the effects of introducing SARs on older people’s quality of life. 相似文献
45.
Kazuko Katsuki Shoji Yoneoka Noriko Mori Masatoshi Hasegawa Yasuhiro Yamamoto Yukichi Yoshino 《Journal of Porous Materials》2008,15(1):35-42
Iron-incorporated zeolites were successfully synthesized at a low temperature such as 80°C by choosing appropriate starting
materials and characterized by inductively coupled plasma atomic emission spectrometry (ICP-AES), wide-angle X-ray diffraction
(XRD), Fourier-transform infrared spectroscopy (FT-IR), and magnetic susceptibility. ICP-AES showed␣that Fe component can
be readily incorporated␣up to a maximum extent of Fe substitution, Fe/(Fe + Al) × 100 = 22.7%. XRD measurements suggested
that the zeolites obtained have a crystal structure of gismondine type. The characterizations identified that the Fe component
present in the products is all incorporated into the zeolite framework. The ammonia and water desorption profiles were compared
for Fe-free and 22.7% Fe-zeolites ion-exchanged for NH4+ by means of TG-MS and DSC. The ammonia desorption peak temperatures considerably shifted toward lower temperatures by the
introduction of Fe, suggesting decreased solid acidity. DSC thermograms of the as-synthesized gismondines revealed that they
do not contain free water (i.e., water not coordinated to cations) in the pores irrespective of the Fe content. The enhanced
catalytic reactivity of the Fe-incorporated gismondines was also confirmed from the decomposition of hydrogen peroxide. An
apparent activation energy of 43 kJ mol−1 was obtained independent of the Fe contents in zeolites. This value was much lower than 70 kJ mol−1 for the same reaction in the homogeneous solution containing iron alum as a reference sample. 相似文献
46.
47.
Fujiwara N Matsumoto T Koyama-Nakazawa K Hisada A Uwatoko Y 《The Review of scientific instruments》2007,78(7):073905
A hybrid NiCrAl pressure cell was fabricated to measure magnetic quantities under high pressure above 3 GPa. A pressure of 4.0 GPa was achieved and the pressure cell was found to be reusable even after a pressurizing trial up to 4.0 GPa. Pressure was monitored using (63)Cu nuclear quadrupole resonance of Cu(2)O and ruby fluorescence. The pressure efficiency of a fresh cell was maintained at 96%, and no appreciable deformation was observed at pressures below 3 GPa; on the other hand, the efficiency after pressurizing trials decreased gradually and reached 75% at 4 GPa accompanied by a maximum expansion inside the cylinder of 2%. 相似文献
48.
Satomi Kobayashi Kentaro Murakami Satoshi Sasaki Kazuhiro Uenishi Mitsuyo Yamasaki Hitomi Hayabuchi Toshinao Goda Jun Oka Keiko Baba Kazuko Ohki Reiko Watanabe Yoshiko Sugiyamama 《Nutrition journal》2012,11(1):1-13
Background
The association between dietary total antioxidant capacity (TAC) from different assays and serum C-reactive protein (CRP) has not been assessed in non-Western populations. We examined the association between dietary TAC and serum CRP concentration in young Japanese women using different four TAC assays.Methods
The subjects were 443 young Japanese women aged 18?C22?years. Dietary TAC was assessed with a self-administered diet history questionnaire and the TAC value of each food using the following four assays: ferric reducing ability of plasma (FRAP); oxygen radical absorbance capacity (ORAC); Trolox equivalent antioxidant capacity (TEAC); and total radical-trapping antioxidant parameter (TRAP). Serum CRP concentrations were measured by highly sensitive nephelometry.Results
The major contributor to dietary TAC was green, barley, and oolong tea (FRAP: 53%, ORAC: 45%, TEAC: 36%, and TRAP: 44%). The prevalence of elevated CRP concentrations (?? 1?mg/L) was 5.6%. TAC from FRAP was inversely associated with serum CRP concentrations (adjusted odds ratio [OR] for elevated CRP concentration in high [compared with low] dietary TAC group: 0.39 [95% confidence interval (CI): 0.16-0.98]; P?=?0.04). TAC from ORAC was inversely associated with CRP, although the association was not significant (OR: 0.48 [95% CI: 0.20-1.14]; P?=?0.10). TAC from TEAC was inversely associated with CRP (OR: 0.32 [95% CI: 0.12-0.82]; P?=?0.02), as was TAC from TRAP (OR: 0.31 [95% CI: 0.12-0.81]; P?=?0.02).Conclusions
Dietary TAC was inversely associated with serum CRP concentration in young Japanese women regardless of assay. Further studies are needed in other populations to confirm these results. 相似文献49.
Hirotaka Ozaki Kazuko Saito Shinji Iwamoto Masashi Inoue 《Journal of Materials Science》2008,43(7):2286-2292
Xerogels of nanocrystalline Si-modified titanias having large surface areas and superior thermal stabilities were obtained
by the glycothermal method, followed by the removal of the organic phase by flash evaporation, and their physicochemical and
photocatalytic properties were investigated. With the increase in the amount of Si addition, the crystallite size of the sample
decreased and BET surface area increased. The zeta potential shifted to the more negative side by Si addition, which affected
the adsorbability of dyes. The obtained xerogels of Si-modified titanias were effective photocatalysts for decomposition of
organic dyes and exhibited higher activities compared to JRC-TIO-4. Xerogel samples were highly dispersed in aqueous solutions
because the coagulation, which may occur during the drying stage in the sample preparation, was effectively prevented and
this feature is one of the critical factors for the high activities of the xerogel catalysts. Their effectiveness for photocatalytic
decomposition of cationic dyes was remarkable since the negative surface charge of the catalysts enhanced the adsorbability
for these dyes. 相似文献
50.
Na–Ca zeolites were synthesized at 80°C from the mixtures of sodium orthosilicate as a Si-source, Al(OH)3 powder as a Al-source, and Ca-sources. A variety of calcium salts highly soluble in␣water were chosen in this work: CaCl2, CaI2, Ca(HCOO)2, Ca(CH3COO)2, and Ca(EtCOO)2 to investigate the effect of anion species from the Ca-sources on the framework type and crystallinity of Na–Ca zeolites.
The crystal phase diagrams as functions of the molar ratio SiO2/Al2O3 and reaction period were determined for different Ca-source systems on the basis of the XRD patterns and SEM observations.
The use of CaCl2 or CaI2 as a Ca-source led to faujasite, hydroxysodalite, and gismondine, whereas hydroxycancrinite was preferentially produced from
the reactants including Ca(NO3)2 independent of SiO2/Al2O3 (=4–20) and reaction period (168–840 h). It was found that the presence of iodine anion strongly hinders the crystallization
of Na–Ca zeolites, in particular, in a high SiO2/Al2O3 range. On the other hand, the systems containing organic carboxylates gave more complex results where faujasite, haüyne,
gismondine, and hydroxycancrinite were formed. All the reaction systems containing these anion species, as well as NO3-, also underwent the dissolution–nucleation–growth processes after faujasite was yielded at the early stage, as a result,
the zeolite framework type varied from faujasite to hydroxysodalite, haüyne, and finally gismondine or hydroxycancrinite. 相似文献