A bound state formalism derived from a fermion-boson symmetric Lagrangian has been used to calculate the nucleon masses, the charge neutrality of the neutron, the magnetic moments and the electromagnetic form factor r...A bound state formalism derived from a fermion-boson symmetric Lagrangian has been used to calculate the nucleon masses, the charge neutrality of the neutron, the magnetic moments and the electromagnetic form factor ratios μpGEp/GMpand μnGEn/GMn. A quantitative description is obtained, assuming a mixing of a scalar bound state of 3(f f¯)fstructure with its corresponding vector (f f¯)fstate (f indicating massless elementary fermions). Only a few parameters are needed, mainly fixed by energy and momentum conservation. The nucleon stability is explained by an extra binding in the confinement potential, negative for electric and positive for magnetic binding of the proton, and opposite for the neutron. The stronger electric extra binding of the proton allows a decay of the neutron to proton and electron.展开更多
This paper presents a posteriori residual error estimator for the new mixed el-ement scheme for second order elliptic problem on anisotropic meshes. The reliability and efficiency of our estimator are established with...This paper presents a posteriori residual error estimator for the new mixed el-ement scheme for second order elliptic problem on anisotropic meshes. The reliability and efficiency of our estimator are established without any regularity assumption on the mesh.展开更多
Among the popular mixed drugs in China,the oral solution shenxianshui and the floury drug milk tea have recently emerged.In 2014,123 bags of milk tea included in 14 cases were tested qualitatively and quantitatively,a...Among the popular mixed drugs in China,the oral solution shenxianshui and the floury drug milk tea have recently emerged.In 2014,123 bags of milk tea included in 14 cases were tested qualitatively and quantitatively,and the test results provided a basis for drug detection,prosecution,and sentencing.More than two drug components were detected in milk tea,which was characterized as a fragrant beige,yellow,or brown powder.The detection rates of methylamphetamine(MA),3,4-methylenedioxymethamphetamine(MDMA),and ketamine in milk tea were 36.6%,50.4%,and 76.4%,respectively,and the concentrations of MA,MDMA,and ketamine were 0.2-5.1,3.2-30.1,and 0.8-176.3 mg/g,respectively,in quantitative testing.展开更多
In this paper,a new numerical method based on a new expanded mixed scheme and the characteristic method is developed and discussed for Sobolev equation with convection term.The hyperbolic part d(x)∂u/∂t+c(x,t)·∇u...In this paper,a new numerical method based on a new expanded mixed scheme and the characteristic method is developed and discussed for Sobolev equation with convection term.The hyperbolic part d(x)∂u/∂t+c(x,t)·∇u is handled by the characteristic method and the diffusion term∇·(a(x,t)∇u+b(x,t)∇ut)is approximated by the new expanded mixed method,whose gradient belongs to the simple square integrable(L^(2)(Ω))^(2)space instead of the classical H(div;Ω)space.For a priori error estimates,some important lemmas based on the new expanded mixed projection are introduced.An optimal priori error estimates in L^(2)-norm for the scalar unknown u and a priori error estimates in(L^(2))^(2)-norm for its gradientλ,and its fluxσ(the coefficients times the negative gradient)are derived.In particular,an optimal priori error estimate in H1-norm for the scalar unknown u is obtained.展开更多
The synthesis and the structural characterization of the title compound HNa[WO（CCH）-（OCCH）（HO）][HWO]·13.5 HO are described.It is known that the mixed oxo-ethylidyne-capped tritungsten cluster can be obtaine...The synthesis and the structural characterization of the title compound HNa[WO（CCH）-（OCCH）（HO）][HWO]·13.5 HO are described.It is known that the mixed oxo-ethylidyne-capped tritungsten cluster can be obtained by Zn dust reduction of NaWO·2HO in acetic anhydride.The title compound has been characterized by X-ray diffraction,UV/VIS andH NMR spectra.The tungsten atoms in the cluster cation and anion are in the oxidation states of W（IV）and W（VI）respectively.The crystal is rhombohedral with the space group R32,a=17.058（3）,c=49.665（9）,γ=120°,V=12516（9）,Z=6,final R=0.037 for 2071 reflections with I≥3σ（I）.Boththe cluster cation and anion have a Csymmetry.The important interatomic distances in angstroms forthe cluster cation are:W—W,2.730（2）;W—μ-O,2.00;W—O（carboxyl）,2.12;W—O,2.18（2）.展开更多
文摘A bound state formalism derived from a fermion-boson symmetric Lagrangian has been used to calculate the nucleon masses, the charge neutrality of the neutron, the magnetic moments and the electromagnetic form factor ratios μpGEp/GMpand μnGEn/GMn. A quantitative description is obtained, assuming a mixing of a scalar bound state of 3(f f¯)fstructure with its corresponding vector (f f¯)fstate (f indicating massless elementary fermions). Only a few parameters are needed, mainly fixed by energy and momentum conservation. The nucleon stability is explained by an extra binding in the confinement potential, negative for electric and positive for magnetic binding of the proton, and opposite for the neutron. The stronger electric extra binding of the proton allows a decay of the neutron to proton and electron.
文摘This paper presents a posteriori residual error estimator for the new mixed el-ement scheme for second order elliptic problem on anisotropic meshes. The reliability and efficiency of our estimator are established without any regularity assumption on the mesh.
文摘Among the popular mixed drugs in China,the oral solution shenxianshui and the floury drug milk tea have recently emerged.In 2014,123 bags of milk tea included in 14 cases were tested qualitatively and quantitatively,and the test results provided a basis for drug detection,prosecution,and sentencing.More than two drug components were detected in milk tea,which was characterized as a fragrant beige,yellow,or brown powder.The detection rates of methylamphetamine(MA),3,4-methylenedioxymethamphetamine(MDMA),and ketamine in milk tea were 36.6%,50.4%,and 76.4%,respectively,and the concentrations of MA,MDMA,and ketamine were 0.2-5.1,3.2-30.1,and 0.8-176.3 mg/g,respectively,in quantitative testing.
基金supported by the National Natural Science Fund of China(11061021)the Scientific Research Projection of Higher Schools of Inner Mongolia(NJZZ12011,NJZY13199)+1 种基金the Natural Science Fund of Inner Mongolia Province(2012MS0108,2012MS0106)the Program of Higher-level talents of Inner Mongolia University(125119,30105-125132).
文摘In this paper,a new numerical method based on a new expanded mixed scheme and the characteristic method is developed and discussed for Sobolev equation with convection term.The hyperbolic part d(x)∂u/∂t+c(x,t)·∇u is handled by the characteristic method and the diffusion term∇·(a(x,t)∇u+b(x,t)∇ut)is approximated by the new expanded mixed method,whose gradient belongs to the simple square integrable(L^(2)(Ω))^(2)space instead of the classical H(div;Ω)space.For a priori error estimates,some important lemmas based on the new expanded mixed projection are introduced.An optimal priori error estimates in L^(2)-norm for the scalar unknown u and a priori error estimates in(L^(2))^(2)-norm for its gradientλ,and its fluxσ(the coefficients times the negative gradient)are derived.In particular,an optimal priori error estimate in H1-norm for the scalar unknown u is obtained.
基金the National Natural Science Foundation of China.
文摘The synthesis and the structural characterization of the title compound HNa[WO（CCH）-（OCCH）（HO）][HWO]·13.5 HO are described.It is known that the mixed oxo-ethylidyne-capped tritungsten cluster can be obtained by Zn dust reduction of NaWO·2HO in acetic anhydride.The title compound has been characterized by X-ray diffraction,UV/VIS andH NMR spectra.The tungsten atoms in the cluster cation and anion are in the oxidation states of W（IV）and W（VI）respectively.The crystal is rhombohedral with the space group R32,a=17.058（3）,c=49.665（9）,γ=120°,V=12516（9）,Z=6,final R=0.037 for 2071 reflections with I≥3σ（I）.Boththe cluster cation and anion have a Csymmetry.The important interatomic distances in angstroms forthe cluster cation are:W—W,2.730（2）;W—μ-O,2.00;W—O（carboxyl）,2.12;W—O,2.18（2）.
