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During the smelting process of refined copper strip production, to reduce varied losses caused by obvious superscales of some individual ingredients, the multi-charge diluting optimization method for smelting ingredients of refined copper strips is studied. The multi-object optimization model for smelting ingredients diluting is established. Lagrangian relaxation idea is introduced to transform the...
Membrane permeability is very helpful for the optimization of effective cryopreservation protocols. In this study, experiments were performed to determine these characteristics for immature (germinal vesicle (GV)) and in vitro matured (metaphase II (MII)) bovine oocytes within 4–37°C, and a new step-wise adding and diluting protocol for ethylene glycol (EG) was developed and verified. Osmotically...
Aiming at the fact that the hydrochemistry environment of shallow groundwater becomes worse and worse in the past ten years in LuoYang. On the basis of large amounts of test and observation datum, the paper analyze the cause form the lithology of aquifer, the recharge, discharge of groundwater and human engineer activity and make the following conclusion: the purification capacity on many contaminations...
Human's social-economic activities have significantly interrupted the natural water cycle, particularly in urban area. The so-called binary natural-social water cycle issue has highly increased the complexity of urban water system. Traditional method to calculate water environmental capacity (WEC) depending on water quality model and long time series of monitoring data is sometimes not practical,...
The crystallization and orientation of chemical vapor-deposited copper films were investigated by means of X-ray diffraction. The ratios of Cu (111) peak intensity to Cu (200) [I(111)/I(200)] of the film deposited at different temperatures were plotted as a function of temperature. Then it can be found that the ratio of I(111)/I(200) increased with the deposition temperature, and 400°C is the best...
This paper presents a system for radioactive isotope automatic diluting and dividing. The system employs personal computer as long-distance controller, precise sampling machine driven by step motors as executor and lead box as radiation protection. The radio isotope automatic diluting and dividing is realized. Moreover, the precision of automatic diluting and dividing excels that of manual work and...
The magnetic properties of the ground state in diluted mixed spin--spin-1 Ising ferrimagnetic (J < 0) systems with a negative crystal-field (D < 0) interaction are studied by using the effective-field theory with correlations. The effects of diluting z = 3 and 4 systems are given in phase diagram and magnetization curves. For the z = 4 system both the second-order and the first-order phase transitions...
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