Based on characteristics of water and its blasting effect, the optimal coefficient of ultimate non-coincidence is found to be 4. 4. Extent of the fragmentation zone and crack zone are 1. 01～1. 84 times and 3. 6～14. 5 times of the radius of blast hole respectively.
The minimum reliability of virgin fuzzy explosion strength at gas pressure test was R_ b1 =99.99954%~99.99999, and was R_ b2 =99.979798%~99.997928% at liquid pressure test.
1. Orthogonal test and the validate experiment were performed to achieve the optimal explosion conditions: NaOH charge 2.0%, Na2SO3 charge 2.0%, AMS charge 0.1%, liquor to wood ratiol: 4.0, explosion pressure 1.4MPa.
The reliability range of virgin explosion strength is equal to R_(b1)=99.801 2%～99.999 998 93% under pneumatic test and R_(b2)=98.030%～99.999 570 6% under hydraulic test.
For the nonlinear Schrdinger equation with Stark potentialiu_t=-1 2△u+V(x)u-k|u|~(4 n)u,t≥0,x∈R~n,u(0,x)=φ(x), we get the estimate of the upper bound and lower bound of the blow-up rate.
By using comparison principle the conditions on the global existence and finite time blow-up of nonnegative solutions are obtained for a nonlocal reaction-diffusion system:u_t-Δu=∫_Ωu m_1dx∫_Ωv n_1dx v_t-Δv=∫_Ωu m_2dx∫_Ωv n_2dx
In this paper, we study a class of nonlinear Schrdinger equation with harmonic potential iφ t=-12△φ+12|x| 2φ-a|φ| 2φ-b|φ| 4φ, t≥0, x∈R n, a,b>0. By using energy method, we prove that if the initial data is satisfied with some conditions, the solutions of equation will blow-up is finite time T<∞.
An evaluation formula of the detonation wave pressure in the system of laser, energy transferring-medium and sheet metal is built according to the theory of detonation wave and blasting gas-dynamics.
The successes of breeding Jiafuzhan is a solution to the existing perennial problems in the rice industry, such as poor grain quality of big-grain rice and early indica rice, low productivity, and poor blast resistance of elite rice.
In recent clinical studies we targeted the increased IMP dehydrogenase activity in leukemic blast cells by an inhibitor drug, tiazofurin, and achieved 77% responses, including complete remissions.
A BLAST analysis revealed an open reading frame (ORF) that appears to encode for the Tetrahymena DNA-[adenine] methyltransferase ((MTase), based on the presence of motifs characteristic of the enzymes in prokaryotes.
To avoid the problem of schemes combination explosion caused by unbounded depth in the search process, bounded depth-first search was used to control the number of expanded hierarchies for a design tree.
These new materials provide new evidence for the origin, evolution and the functional evolution of the metazoan during the early stage of the Cambrian Explosion.
It is proved that when the solution is blow-up in a finite time s(uo), and u0(x) is not a constant, then the free boundary will not be blow-up and the blow-up set is contained in the interval [0,l0).
This paper deals with the blow-up properties of solutions to the systems ut=Δu,vt=Δv in BRX(0,T) subject to nonlinear boundary conditions , in SRX(0,T).
爆破
blasting
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