Search results

Synthesis of monodispersed lauric acid capped silver nanoparticles by wet-chemical reduction method Chunfa Donga, Xianglin Zhang*b, Chuanliang Caoc and Hao Caid State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China adongchunfa@126.com, bhust_zxl@mail.hust.edu.cn, ccaoliang1102736@126.com dchhust@hust.edu.cn, Keywords: Lauric acid; Silver nanoparticles; chemical reduction method; nanoparticles Abstract.
The results showed that monodispersed and stable nanosize silver sol can be prepared by wet-chemical reduction method and the distribution of particle size and the stability of the nano silver sol can be analyzed by UV-visible spectrophotometer.
The peaks are consistent with the data on standard card (JCPDS 04-0783) corresponding face centered cubic crystal system (FCC) elemental silver (111), (200), (220), (311), (222) crystal plane diffraction.There are no other peaks in Figure1, which indicated that the sample is high purity elemental silver .Combined with the Scherrer formula, crystallite size of each crystal face can be calculated.
TEM morphologies of nano-silver particles synthesized at different temperature: (a) 25 °C， （b) 50 °C，(c) 80 °C Conclusions (1)The uniform particle size of nano silver sol is successfully prepared by liquid chemical reduction method with the use of silver ammonium solution as the precursor, lauric acid as capping agent and hydrazine hydrate as reducing agent.

Testing data Template.
Testing data.
IRAF was developed in 1986, and becomes a popular tool for astronomical data reduction.
Lipton, "Sloan Digital sky survey: early data release," J.
Data reduction techniques," J.

In available literature, the formulae recommended for load bearing capacity prediction and design are based on empirical approach, mostly resulting from statistically processed experimental data [1,2].
The proposed reduction coefficient obviously has to be related to the reinforcement ratio, as for slightly reinforced sections the reduction in moment capacity induced by member curvature is negligible and for sections with high reinforcement ration, even at the threshold of concrete crushing failure, the reduction may reach levels higher than 15 %.
As the reduction was found to be strongly non-linear, a function with more than one parameter was required to approximate it.
For reinforcement ratios ρ lower than 0.15 %, the reduction should be considered zero.
Still, the proposed moment capacity reduction formula (Eq. 8) is quite simple and comprehensible.

Lubricated Friction Reduction by Spiral-Groove-Shape Nano-Texturing Yusuke Tanaka1,a, Kazuma Okada1, Tomoko Hirayama1,b, Takashi Matsuoka1,c, Hiroshi Sawada2, Kosuke Kawahara2 and Shunji Noguchi2 1 Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0394, Japan 2Canon Machinery Inc., 85 Minamiyamada-cho, Kusatsu, Shiga 525-8511, Japan adtl0395@mail4.doshisha.ac.jp, bthirayam@mail.doshisha.ac.jp, ctmatsuok@mail.doshisha.ac.jp Keywords: triibology, lubrication, friction reduction, nano-texturing, spiral-groove Abstract.
The sampling frequency was 100 Hz, and we conducted an averaging procedure on the obtained data for every ten points. 3.

Langmuir linear equation model can well describe the adsorption equilibrium data suggesting that the adsorption process involves both chemisorption and physisorption.
The conventional process of Cr (VI) removal is the combination of chemical reduction converting Cr (VI) into Cr (III) and chemical precipitation in which Cr (III) precipitates as Cr(OH)3 [5, 6], Although the chemical reduction and precipitation method is simply and economical, it will brings sludge disposal problem and requires high cost on final filtration for secondary treatment [7]. adsorption, reduction, electrolysis, liquid membrane, ion exchange and other methods [8, 9, 10]are also advised for Cr (VI) removal.
Several adsorption isotherm models, such as Langmuir, Freundlich were employed to describe the adsorption equilibrium vs. equilibrium concentration of the anions (mg/L) and Langmuir models are proved to be the better one to fit the data attained in the experiment.
As we can see, all the data are fitted very well by Langmuir equation with linear correlation coefficients greater than 0.99. thus, it is concluded that Cr (VI) adsorption is a monolayer adsorption process and the adsorption between Cr (VI) ion and the active sites on TCIEF are chemisorption property.
Table 2 Thermodynamic parameters for adsorption of Cr (VI) on TCIEF qe/(mg/g) ΔH/(kJ/mol) ΔG/(kJ/mol) ΔS/(J/mol×K) 293 K 303 K 323 K 293 K 303 K 323 K 80 3.111 -3.066 -12.45 -2.269 21.08 51.35 16.66 90 8.736 -3.988 -13.14 -2.275 43.43 72.20 34.09 100 19.96 -5.490 -13.88 -3.352 86.86 111.7 72.17 Conclusion A new type of ion exchange fiber is successfully prepared for the removal of Cr (VI) from water, The langmuir model can describe all the adsorption data with correlation coefficients greater than 0.99.

Prediction of the possible vibration intensity extreme points and its distribution are processed data mining and prediction by sensor signal amplification, analog-digital conversion, and online monitor.
It still has some difficulties in the study of the effective control of this system through modern nonlinear dynamics theory[4,5], thus it is a positive decision-making attempts the research of high vibration intensity parameters, line monitoring, data mining, predictive calculations and advanced drop control[5,6].
The data mining and advance calculation should be based on the default frequency conversion curves [8, 9], and then frequency control decision could be judged, reasoned and corrected by constraint conditions.
According to the former waves, the maximum value of median wave can be predicted, and advance control amplitude reduction function can be achieved.
Overtime and over-limited value of main parameters are determined by constraints, and advance reduction amplitude and emergency stop function are carried out if the reduction amplitude is not enough.

For the problem of feature redundancy of emotion recognition based on multi-channel physiological signals and low efficiency of traditional feature reduction algorithms on great sample data, a new chaotic particle swarm optimization algorithm (TM-CPSO) was proposed to solve the problem of emotion feature selection by combining tent map based chaos search mechanism and improved particle swarm optimization algorithm.
The recognition rate and efficiency was increased and the algorithm's validity was verified through the analysis of experimental simulation data and the comparison of several recognition methods.
A significant amount of work has been conducted by Picard and colleagues at MIT Lab who showed that certain affective states may be recognized by using physiological data including heart rate, skin conductivity, temperature, muscle activity and respiration velocity [2].
Experiments show that when the amount of data in feature sets increases, the computing speed and recognition performance of these traditional suboptimal algorithms is not satisfactory.
Then corresponding data conversion and typical statistical values of these signals are computed to obtain four feature matrixes with 193 features: ECG 100*84, EMG 100*21, SC 100*21, RSP 100*67.

Morphological and optical data confirms that rGO losses the oxygen groups compare to GO.
Thus, GO can be reduced by a chemical reagent, thermal reduction and multistep reduction in order to remove the oxygen containing functional groups [6].
More folded and wrinkled structure is produced when the reduction is stronger [15].
This is due to the reduction of the oxygen functional groups in graphene oxide.
Park, “Simple and cost-effective reduction of graphite oxide by sulfuric acid,” Carbon N.

Research on the key technology of vegetation roofing energy saving Bao Xuefang Department of architecture & urban planning of Anhui institute of Architecture & Industry, China Email: 984813129@qq.com Keywords: vegetation roof planting technology energy-saving emission reduction ecological landscape Abstract: This paper focuses on the key technical requirements of roof vegetation, using contrastive method analysis of vegetation roofing heat preservation, heat insulation performance advantages and energy saving and ecological landscape effect, to study the climate vegetation roofing greening plant key technology and application.
Vegetation roofing energy-saving emission reduction effect Energy saving and economic benefits mainly with insulation in summer and heating in winter in roof greening effect, can effectively overcome the influence of summer extreme climate in hot summer and cold winter area of hot, cold winter, improve the building environment microclimate, save the air-conditioning and heating or cooling load, reduce the pressure of city electricity, energy saving
(1) analysis of roof green insulation, insulation performance Green roofs have "natural air conditioning", has a certain heat preservation, heat insulation and energy saving effect,It likes a warm cover the protection of buildings in winter, roof greening in addition to the insulation layer outside the heat insulation effect, the vegetation layer and the planting soil layer also has the performance of double heat preservation, According to the roof greening Hefei area and control area (cement roof) recording observation data: green roof after the indoor temperature increase compared to 2 ℃, (Fig.4) winter warming effect is obvious, double insulation can basically meet the requirement of thermal comfort in buildings in the area.
Vegetation roofing vegetation in the summer, vigorous growth, with luxuriant foliage plant growth, photosynthesis will most of the solar energy into biomass, solar radiation heat and reduce the direct effect on the roof, at the same time, planting grass roof thickness increased, gain ability to resist the external thermal effects, Summer (August) afternoon 14 when the roof greening and the control area of the roof temperature observation data recording, the control area of the common roofing temperature is 50.5 ℃, the green zone temperature is only 35.4 ℃, 15 ℃ floor temperature difference, the indoor temperature 1.5 ℃ contrast decreased (Fig.), so green roof can Fig.4 Vegetation roofing and the common roof and test temperature control effectively reduce the temperature of the roof and the summer indoor temperature, reduce air conditioning load, to achieve the purpose of energy-saving insulation.
(2) vegetation roofing reduction effect Air is the necessary material conditions for human survival, city of oxygen consumption of dense population, the high concentration of carbon dioxide, green plants producing oxygen absorption of carbon dioxide, the ground greening area limited, roof greening of atmospheric oxygen and carbon dioxide balance play an important role.

With shear rate increasing, both the peak strengths and the post-peak strength reduction become greater.
According to the data of deformation and pore pressure measured during the tests, there are two patterns of causing the strain softening of the silty clay.
In the case of post-peak strength reduction, the values in the tests of 1cm/s are 45% and 65% respectively greater than those obtained in 0.1cm/s and 0.01cm/s tests.
Consequently, it can be supposed that there maybe two probable patterns of the post-peak strength reduction of the silty clay in this study.
The higher shear rate tests are usually accompanied with greater peak strength and higher post-peak reduction in shear stress.