Search

This paper investigated the timing characteristics of warehouse-out products in a large-scale logistics base. First of all, it revealed that the amount steel products warehouse-out of each warehouse in a logistics base had basic characteristics of fractal Brownian motion, by the rescaled range method and taking amount of warehouse-out products in a large-scale logistics base for example. Amount of warehouse-out logistics system not only guided by the current market price, but also greatly influenced by the warehouse-out quantity past of a period of time. Because range method used in the process of interval reconstruction could lead to the lack of some information, it used the method of complex networks to verify the fractal characteristics of logistics system further, and found that all basic visible graph had the characteristics of small-world and scale-free. The rescaled range method and visible graph method both explain that amount of warehouse-out products in a large-scale logistics base is not a random walk process, but has intrinsic regularity, and memory effect make amount of warehouse-out now and past to keep certain trend. [ABSTRACT FROM AUTHOR]

In order to solve the problem of the lack of effective quantitative method of stress wave velocity, indoor test was carried out with multi-point distribution measurement, and the db6 wavelet scale 3 or 4 dimension analysis method were adopted to analyze the test signal. This study show that the size of the wave velocity can be determined accurately as well as the signal of the change of wave velocity can be responded in the top of the sensor by using the multi-point distribution measurement. For the anchor bolt with a single defect,the defect position is obtained by using the average wave velocity and the calculated anchor length are consistent with the actual results, while adopting subsection calculation method for the more defects anchor to avoid the influence of discrete wave velocity of each measurement section. Compared with the stress wave velocity, its change can reflect the quality of anchor bolt better due to larger discreteness, based on that the bottom reflection time can be presented in the low frequency signal as a3 or a4, since that the low frequency signals big defects while high ones represent the detail. [ABSTRACT FROM AUTHOR]

Basing on the theoretical model and empirical analysis, this paper provides a discussion of the hedging effectiveness between the stock market and index future market under the imperfect market conditions. In theoretical analysis, the relation of market imperfection with market microstructure noise and hedging effectiveness is established. In empirical analysis, one approach based on nonparametric estimation is established and applied to real data. The reasonableness of model assumptions and the correction of model conclusions are verified by using 5-minute frequency intra data. Both theoretical and empirical analyses show that the higher the degree of market imperfection, the more necessary to consider the impact of market microstructure noise when using stock index futures to hedge the stock market risk. The empirical results also show that there exists a high degree of imperfection between stock market and stock index future market, but the degree of imperfection has a decreasing trend. [ABSTRACT FROM AUTHOR]

The purpose of the experiment was to study the effect of different types of woody forages for fattening Liaoning cashmere goats. 24 both cashmere and meat strain of Liaoning cashmere female goats [2.5 years old and average body weight (43.41±1.76 kg)] were randomly divided into four groups, with six goats in each group. Group 1 was the control, and the others were feeding with 10% Vitex, Caragana microphylla and oak leaves. The experimental period was 75 d. The results showed that the crude protein content of Vitex was significantly lower than that of Caragana microphylla and oak leaves (P<0.05), the crude fat content of Vitex was extremely lower than that of Caragana microphylla and oak leaves (P<0.01), the crude fiber and acid detergent fiber content of Vitex was significantly higher than that of oak leaves ( P<0.05), the calcium content in the oak leaves was extremely higher than that of Vitex and Caragana microphylla (P<0.01), and the content of phosphorus in the oak leaves was significantly higher than that of Vitex (P<0.05). The daily weight gain in group 2~4 was extremely higher than that of group 1 (P<0.01), the feed to gain ratio in group 4 was significantly lower than that of group 1 (P<0.05). The apparent digestibility of crude protein in group 4 was significantly higher than that in group 1 (P<0.05), and the apparent digestibility of crude fat was significantly higher than that in group 2 (P<0.05). The apparent digestibility of crude fiber in group 4 was significantly higher than that in group 1 ( P<0.05). The apparent digestibility of neutral detergent fiber was significantly higher than that in group 2 (P<0.05). Using 10% Vitex, Caragana microphyllaand oak leaves could decrease the cost of ration and increase profiting of ?0.37~0.66 each goat in one day. The study indicates that Vitex, Caragana microphyllaand oak leaves could be used substituting other herbage to get better growth performance, digestibility and economic benefit, and in which oak leave was the best. [ABSTRACT FROM AUTHOR]

The experiment was to study the effect of different protein levels rations on meat nutrition composition of Liaoxi donkeys. A single factor design was adopted in the experiment. Eighteen healthy donkeys were selected and divided into three groups randomly, with six replicates in each group (half in male and female), and one donkeys in each replicate. Donkeys were fed with protein level of 10.71% (trial group 1), 13.57% (trial group 2), 16.42% (trial group 3) rations, respectively. The experimental period lasted for 180 d. The results showed that Asp and Arg of trial group 2 were significantly higher than group 1 and group 3 (P<0.05). Ser and Lys of trial group 2 were significantly higher than group 1 (P<0.05). Ile and Phe of trial group 3 were significantly higher than group 1 and group 2 (P<0.05). Met, Trp and Leu of group 3 were significantly higher than group 1 (P<0.05). Tyr and total amino acid content of trial group 2 and trial group 3 were significantly higher than group 1 (P<0.05). SFA and PUFA of trial group 2 were extremely higher than group 1 and group 3 (P<0.01). MUFA of trial group 2 were significantly higher than that of group 1 and group 3 (P<0.05). Mg content of trial group 1 and trial group 2 were significantly higher than trial group 3 (P<0.05). The experiment indicates the protein level of 13.57% and 16.42% rations improved amino acid content of Liaoxi donkeys meat, and protein level of 13.57% ration extremely improved fatty acid content of Liaoxi donkeys meat. [ABSTRACT FROM AUTHOR]

Perovskite rare earth orthoferrites RFeO3 possesses abundant magnetism, which is due to the complex interaction between rare earth ions in 4f electron shell and iron ions in 3d electron shell. As an important phenomenon in RFeO3 system, magnetization jump means that the magnetic moments of rare earth ions and iron ions in the system rotate 180° under a specific temperature and applied magnetic field, and the macroscopic performance is that the magnetization changes abruptly in the magnetocaloric curve. In this paper, two kinds of magnetization jump phenomena of different compounds RFeO3 are discussed, the first type of magnetization transition usually has compensation points, and the coupling direction of FR and FFe is unchanged, while the second type of magnetization transition is opposite, and the temperature region of the two types of magnetization transition is regulated by the external magnetic field. [ABSTRACT FROM AUTHOR]

Aiming at power quality problem of power system and the influence of compensating efficiency caused by the accuracy of phaselocked loop (PLL) on APF, the efficiency of (APF) for eliminating harmonic, current and compensating reactive power was analyzed according to the mechanism of harmonic current problem and reactive power problem in power system. Two software PLL (SPLL)s were compared on Matlab/Simulink simulation platform, their ability of lock and trace phase being tested under kinds of electric environment such as balanced voltage and unbalanced voltage and frequency change. Based on the results of simulation, the (DDSRF-SPLL) was proposed to be applied to APF because of its robustness. An APF prototype based on TMS320F28335 DSP was designed for experiment under the situation of balanced voltage and unbalanced voltage and load change. The results indicate that the APF with this PLL technique has good compensating performance and environment adaptability. [ABSTRACT FROM AUTHOR]