The Drinfeld double D(H) is a very useful quasi triagular Hopf algebra.S Majid generalized the Drinfeld double and constructed a double crossproduct A H [1,2] .Double bicrossproduct A α ψ βH, which was constructed by W Zhao,S Wang and Z Jiao [3] ,is a more generalized product.The double bicrossproduct generalizes double cross products(coproducts),bicrossproducts,biproducts,Drinfeld double,and smash products(coproducts). Braided tensor categories were introduced by A Joyal and R Street [4] .Algbraic structures within them,especially Hopf algebras were introduced by S Majid.The author Shouchuan Zhang and H Chen constructed the double bicrossproduct D=A α ψ βH in braided tensor categories and gave the necessary and sufficient conditions for D to be a bialgebra [5] . Y Bespalove and B Drabant stripped off some conditions of double bicrossproduct and defined the cross product bialgebras in braided tensor categories [6,7] .We show that cross product bialgebra D=A φ 1,2 × φ 2,1 H is a Hopf algebra when both A and H have antipodes.
It has been presented a wavefront array algorithm and its data flow graph for two dimensional discrete fourier transforms on VLSI computation model, gived a wavefront array architecture for two dimensional discrete fourier transforms using wavefront array of matrix multiplication, compareed the wavefront array with its systolic array, we get the result that the waveforont array is better than the systolic arrary.
Coupled transports of La(Ⅲ)ions were carried out by means of liquid membranes containing mono(2 ethylhexyl)2 ethylhexyl phosphonate in kerosene. The influences of pH in the feed solution,carrier concentration in the membrane phase, HCl concentration in the stripping solution, and temperature were investigated. The kinetics of La(Ⅲ) transport could be analyzed in the formalism of two consecutive irreversible pseudo first order reactions.The pseudo first order apparent rate constants of the interfacial transport of La(Ⅲ) species were determined with bulk liquid membrane,altering temperature.The apparent activation energy values are 15.2 kJ·mol -1 for extraction and 26.6 kJ·mol -1 for stripping, respectively.
The functional amino acid sequence and its neighbouring fragment in the molecule of ω conotoxin isolated from the venom of the conus magus marine snails were transferred, by solid phase chemical synthesis into the region of the huwentoxin? Ⅰ (HWTX? Ⅰ). The synthetic chimera polypeptide was confirmed by MALDI TOF mass spectroscopy. HPLC was used to monitor the oxidative foliding of synthetic chimera in diferent conditions to find optimal condition for renaturation of synthetic chimera,renatrred chimera was purified by reversed phase HPLC.The results showed that the chimera exerted 27% of the neurotoxin activity to inhibit the transmission of isolated mouse phrenic nerve diaphragm preparation with the concentration of 1×10 5 g/mL. The experiments demonstrated that HWTX I is well promising for protein engineering.
The transportation actuality and problem in the background of carrying out the west area exploring strategy are analysed. At the same time, it puts forward strategy about the layout of transportation network. The writer holds that the traffic construct needs a leading development strategy. So forms a comprehensive transportation system, in which the road, the railway, the voyage and the water carriage are copulated one another on the base of the road.
The abuse of resoures exploitation leads to deterioration in the western regional ecocnvironment. Strengthening the protection and construction for ecoenvironment is the base of the enforcement of west development strategy, which has important meaning to western region and the whole country. This acticle puts forward the appropriate channels and measures on construction a sound ecoenvironmental system of west development and sustainable development on the basis of analysing the questions and primary factors on west regional resources exploitation.
The following linear impulsive delay difference equation is considered.where Pn, k, nt, bt satisfy. the following conditions respectively.(H1) { pn }is a sequence of nongative real numbers and k is a positive integer;we note that in some conditions the oscillation and stability of equation(1)is equivalent to the onesof the following delay difference equation(2),pn(n ≥0,n ≠ nt),Then three sufficient conditions for oscillation and asymptotic stability are obtained.``
The loses caused by disastrous flood is far too serious in Changsha city where is among the important cities of flood prevention in China. It is caused by many natural and man-made factors Such as follows: climate features, the addition of flood in the up and middle valley along the Xiang River, the compound function of flood in local region, the supporting function of flood level from Dongting Lake, the blockage of branches and development of beach, the invasion and occupation to the river valley and low-lying land, there being many problems in the prevention engineering, the administrative system of urban flood prevention being still less better. This study will serve as the scientific basis for flood forecast, plan-making of flood prevention and formulating countermeasures of disaster reduction.
According to the effective mass theory, a hydrogenic impurity located at the center of a spherical GaAs Ga 1-x Al xAs quantum dot is studied. Assumed the infinite depth potential well model, the confining effects of the quantum dot on the energy of the system and electron distribution probability are discussed and the wave function of the finite form is given. Meanwhile, the perturbation of an external weak electric field is considered and the first order correct wave function and second order correct energy are given by use of the direct perturbation method.
We investigate a ratio dependent three species predator prey food chain dynamics model with Machaelies Menten type which is more actual and more popular,by using Mawhin coincidence degree theory and combining with inequality skill.We obtain a new sufficient conditions for the existence of positive periodic solution of the system,Our results extend relevant conclusions in some literature.
We study the largest eigenvalues of Laplacian matrices of all bicyclic graphs with the order n by using the degree sequence and neighbour set. The bicyclic graph with the largest eigenvalue n of Laplacian matrix is determined, and the bicyclic graphs with the largest Laplacian eigenvalues between n and (n-1) are also determined.
By using Lyapnov function the synthetic parameter, i.e. coefficient of curvature of HOPF bifurcation theorem, in time domain is derived, the oscillation of second order autonomous nonlinear circuit is analyzed by means of the local type of two-dimension system of the theorem, a couple of complex eigenvalues of Jacob matrix of the state equations for the circuit and the coefficient of curvature are calculated by use of the state equations, then whether or not a circuit will occur self-oscillation can be judged through judging that if there exist a steady limit cycle, in the circuit in this paper. As a result, a new method for analyzing the oscillation of the electronic circuits is provided.
According to the results of the fieldwork in Anxiang, Li and Hanshou Counties in Hunan province(July, 1999 to Mar, 2000), this thesis reports the achievements of schistosomiasis control in Dongting Lake District in recent 50 years and the difficulties the job is facing at present. Furthermore, some suggestions are provided to better the schictosomiasis control in Hunan province.
Recent years the tourist development in the Dongting Lake Region is just in ascendant. People there are getting to make further use of the tourism natural resources and the preponderance of the area, establish the developing thinking, explore the developing relevant methods, and follow the developing tourist way with the lake's feature. All those measures above are practical significant to the promotion of the social economic and culture around Dongting Lake.
Directing towards the grey uncertainty of probability itself, the concepts of grey probability, the grey degree of grey probability, grey probability distribution, grey probability density, grey expectation and grey variance are defined based on the theory of probability and grey system approach. The Dempster-Shafer theory and Dempster's and Shafer's approachs to inference, that can be used to estimate the parameters of grey probability distribution, are introduced.
Studies on the young softed shelled turtles show that there are obvious differences in the ventical color (mottling) of different races, however, young individuals of the same race have the same ventical color which does not change with the changing of living environment during a certain time. At the same time, it is discovered that young softed shelled turtles obtained by artificial propagation show differentiation of ventical color because of mixed germ line. young softed shelled turtles hatched from the eggs collected from the wild have black dots and no dots. They are obvious differences by biochemical test and contrast feeding. All our studies demonstrate that: we can classify the softed shelled turtles by the ventical color of young individuals and get the pure line through this way during artificial culture.
Pure silicon and Ti-substituted mesoporous molecular sieves(HMS and MCM-41) have been synthesized by surfactant templpating pathway.A type of Ti(O iPr) 4+DET chiral complex has been successfully assembled to mesoporous carriers by use of exchange reaction of the surface hydroxyls of mesoporous carriers with Ti compound or d-diethyl tartrate(DET).Though four assembled pathways,chiral Ti anchored mesoporous catalysts have been first prepared.These anchored chiral catalysts are characterized by FT-IR.Its Ti contents are measured.In catalyzing the epoxidation of styrene with tertbutyl hydroperoxide(TBHP) as an oxidant,these chiral catalysts have the better catalytic activity and the selectivity for the epoxides.The adjusting interaction of DET ligand to the Ti sites anchored on the mesoporous carriers will cause the decrease in the catalytic activity and the increase in the epoxidation selectivity of the Ti sites.The chiral inducting interaction of DET will induce to produce the enantiomeric excess of d-epoxide(ee.% is up to 32.4%)
On the condition of raising in cages,Ciconia ciconia boyciana are found to have behavior of building nest and mating in February 2001,they spawn two eggs on March 18th and 19th.having Hatched together for 31 and 33 days,no nestling is hatched due to failure of fertilization.Then,the behavior of building nest and mating are found,and Ciconia ciconia boyciana spawn three eggs one after another.Having hatched together for 18 and 19 days,no nestling is hatched yet.The observation on the of natural reproductive behavior of Ciconia ciconia boyciana is reported in this paper,the reacons for the failure of reproduction of Ciconia ciconia boyciana in Changsha is also analysed.
A novel algorithm is proposed for the fixed-node quantum Monte Carlo (FNQMC) method. In contrast to previous procedures, its “guiding function ” is not optimized prior to diffusion quantum Monte Carlo (DMC) computation but synchronistically in the diffusion process. The new algorithm can not only save CPU time, but also make both of the optimization and diffusion carried out according to the same sampling fashion, reaching the goal to improve each other. This new optimizing procedure converges super-linearly, and thus can accelerate the particle diffusion. During the diffusion process, the node of the “guiding function” changes incessantly, which is conducible to reducing the “fixed-node error”. The new algorithm has been used to calculate the total energies of states X3B1 and a1A1 of CH2 as well as Π-X2B1 and σ-1a1 of NH2. The singlet-triplet energy splitting (ΔE S-T) in CH2 and σ-π energy splitting ΔE σ-π in NH2 obtained with this present method are (45.542 ± 1.840) and ( 141.644 ± 1.589) kJ/mol, respectively. The calculated results show that the novel algorthm is much superior to the conventional fixed-node quantum Monte Carlo in accuracy, statistical error and computational cost.
