According to the fabrication and inspection practice of nearly one handed sets of hot wall hydro genating reactor designed by our country in the past ten years, in this article, some dissents are raised to the related provisions of the related current standard specification of the pressure vessel in china ( eg. GB150、JB4726-4728、JB4730 etc. ) , some modifications are also advanced.
From the function unit level of equipment, it introduces the theory of continuous attributes decision-making support system based on rough set and applies to knowledge representation of the maintenance-requirement identification, rules acquiring and maintenance-requirement decision making.
New Synthetic Method for Industrial Manufacture of Glutaric Dialdehyde
A new synthetic method for the manufacture of glutaric dialdehyde is investigated.
The solid-state chemical method has the advantages of low cost, low pollution, and high yield, therefore it appears to be a promising method in the industrial manufacture of nanometer MgO.
Adhesive application method in MDI-UF particleboard manufacture
In this study, we investigated the use of an emulsifiable diphenylmethane-4, 4'-diisocyanate (MDI) - urea formaldehyde (UF) mixture adhesive in particleboard manufacture, in order to decrease F-emission to below 9 mg per 100 g board.
Results show that DMF/H2O mixtures are proper media for PEAPH/PDAC multilayer fabrication.
This method can be applied to multilayer fabrication of other water-insoluble polyelectrolytes.
The accelerometer has a high sensitivity of 6.91 kHz/g, a low temperature coefficient, and a simple fabrication process.
The fabrication of the chip, including a heavily phosphorus-doped poly-silicon micro-electrode array and a thermally grown SiO2 dielectric layer, was exploited to improve the chip stability and decrease the actuation voltage.
The design and fabrication on gate type resonant tunneling transistor
We shall construct a generating set of a nonfinitely generated Ga-invariant ring given in Freudenburg's counterexample by making use of an integral sequence which was constructed inductively by Freudenburg.
Based on it the authors establish inhomogeneous discrete Calderón reproducing formulas for spaces of homogeneous type, making use of Calderón-Zygmund operators.
A class of constrained semi-infinite minimax problem is transformed into a simple constrained problem, by means of discretization decomposition and maximum entropy method, making use of surrogate constraint.
In this paper the reaction-diffusion systems and the damped wave systems with non-linear terms of gradient form are studied, and the conditions for making them to be gradient systems are given.
By making use of the 3-D zerotree structure, a simple method for region of interest (ROI) mask generation is put forward.