the damage of artificial core permeability by this fluid is in range 5.74—9.66% and of 7.32% in average while that by an organic Ti crosslinked fluid — 24.07—29.98% and 27.09% in average.
On an artificial core of permeability to water 1.33 μm 2 and 99 mm long after injection and adequate gelation of 2 PV of 60A 1, breakthrough pressure of 8.16 MPa, residual resistance factor of 1 000 , and water plugging rate of 99.3% are observed;
The breakthrough pressure, p_t, is determined for artificial cores of different permeability, k(0.1—1,3—4,11—13 μm~2), having plugged by four experimental cilicic gelling fluids composed of 4%,6%,8%, and 10% water glass, respectively, plus 10% HCl.
The specific breakthrough pressure of artificial sandtone cores with a fracture of 1.7—2.0 mm wide after injecting 1.0 PV of the formulated fluid and gelating at 72℃ in 72 h is in range 32—61 MPa/m.
? The reaction mechanism of synthetic Monazite decomposed by CaO with NaCl additives was studied by means of XRD and TGDTA. The results show that the chemistry reaction by CaO is 3CaO+2REPO4=Ca3(PO4)2+RE2O3 at the temperature of 620~700?
The quality of the wastewater from synthetic diamond production is analyzed, and a method of using oxygen-bearing oxidizer to remove Mn2+ from the wastewater from synthetic diamond production is proposed.
The effect of temperature on the deformation behaviours of Ⅰb synthetic diamond,Ⅰa and Ⅱa natural diamonds has been studied by means of soft impressor slider technique.
Results The emission levels of formaldehyde in 15 of 27 man-made board samples were higher than 1.5 mg/L and the rate exceeding the national standard was 56%.
Finally, experimental results show that this method can extract manmade object in infrared image under conditions of complicated background and low contrast, and the correct detection ratio is more than 95%.
More particularly, Genetic Algorithms, Artificial Neural Networks and Fuzzy Logic methods seem to be the most promising tools to speed up and optimize the search for new leads and focused libraries.
Chitosan-sodium alginate-hemoglobin microcapsules are expected to become an artificial oxygen-carrying therapeutic agent with sustained release for intravenous injection.
It is also discovered that the major approaches to artificial intelligence in history, the structuralism, functionalism and behaviorism, can harmoniously be unified within the framework of the mechanism approach and no longer be contradictory.
This paper presents a distributed self-spreading deployment algorithm (SOMDA) for mobile sensors based on artificial neural-networks self-organizing maps algorithm.
The details of the synthetic sequence followed for the preparation of all these compounds having almost all the structural features required for a compound to act as a potent insulin sensitizing agent are reported.
The problem of spacecraft protection against the impact effect of meteorites and man-made (technogenous) particles has become especially topical in connection with the necessity of long-duration flights in space.
We report the first experimental observation of a nonlinear laser effect, stimulated Raman scattering (SRS), in manmade diamond grown from the gaseous phase by the chemical vapor deposition (CVD) technique.
The objective of the study on basic land price using the optimal path algorithm is to decrease the manmade error, enhance automatization, avoid make inconvenience by roadblock object.