2,415 research outputs found
Pointwise Weighted Approximation of Functions with Endpoint Singularities by Combinations of Bernstein Operators
We give direct and inverse theorems for the weighted approximation of functions with endpoint singularities by combinations of Bernstein operators
Another weighted approximation of functions with singularities by combinations of Bernstein operators
We give direct and converse results for the weighted approximation of functions with inner singularities by a new type of Bernstein operators
Regularization dependence of pion generalised parton distributions
Pion generalised parton distributions are calculated within the framework of
the Nambu--Jona-Lasinio model using different regularization schemes, including
the proper time regularization scheme, the three dimensional momentum cutoff
scheme, the four dimensional momentum cutoff scheme, and the Pauli-Villars
regularization scheme. Furthermore, we check the theoretical constraints of
pion generalised parton distributions required by the symmetries of quantum
chromodynamics in different regularization schemes. The diagrams of pion parton
distribution functions are plotted, in addition, we evaluate the Mellin moments
of generalised parton distributions, which related to the electromagnetic and
gravitational form factors of pion. Pion generalised parton distributions are
continuous but not differential at , when considering the effect
of D-term, generalised parton distributions become not continuous at in all the four regularization schemes. Generalised parton distributions
in impact parameter space are considered, the width distribution of quark
in the pion and the mean-squared
are calculated. The light-front transverse-spin distributions are studied, when
quark polarized in the light-front-transverse direction, the
transverse-spin density is no longer symmetric around , the
peaks shift to , we compare the average transverse shift
and in
different regularization schemes. The light-cone energy radius and
the light-cone charge radius are also evaluated, we find that in the
proper time regularization scheme the values of these quantities are the
largest, in the three dimensional momentum cutoff scheme they are the smallest.Comment: 34 pages, 39 figure
固本益肺汤联合腹针治疗尘肺30例疗效观察
Objective: To observe the clinical effect of Guben Yifei decoction combined with acupoint sticking therapy on pneumoconiosis. Methods: 60 cases of pneumoconiosis with syndrome of deficiency of both lung and kidney were randomly divided into two groups. The two groups were treated with oxygen, anti fibrosis, antiasthmatic, expectorant, and so on for 15 days of a course. In addition to the treatment program of control group, the patients in treatment group were also treated with Guben Yifei decoction (1 doses /d, water decoction) combined with abdominal acupuncture therapy, 1 times /d, for two courses. Observation of patients with cough, sputum, asthma, pulmonary rales and other effects was made and paid attention to symptoms and signs, serum immunoglobulin and changes of blood oxygen saturation before and after the treatment. Results: symptoms, signs disappeared time and healing time, oxygen saturation, serum immunoglobulin were better than the control group (P < 0.05), there was significant difference (P < 0.05). Conclusions: The curative effect of Guben Yifei decoction combined with abdominal acupuncture therapy on pneumoconiosis is remarkable.目的 观察固本益肺汤联合穴位贴敷治疗尘肺的临床疗效。方法 将60例辨证为肺肾两虚型尘肺的患者随机分为两组,两组均予以吸氧,抗纤维化,平喘,化痰等治疗。两组均以15天为1个疗程。治疗组在对照组治疗方案基础上加固本益肺汤治疗,1剂/d,水煎服,同时联合腹针疗法,1次/d,连续治疗两个疗程。观察患者咳嗽、咳痰、喘憋、肺部罗音等疗效,同时观察治疗前后症状、体征、血氧饱和度、血清免疫球蛋白等变化情况。结果 治疗组在症状、体征消失时间及治愈时间、血氧饱和度、血清免疫球蛋白等方面均优于对照组(P<0.05),两组疗效比较,有显著性差异(P<0.05)。结果 固本益肺汤联合腹针疗法治疗尘肺疗效显著
FORMULATION DEVELOPMENT AND CHARACTERIZATION OF TEA TREE OIL LOADED ETHOSOMES
To prepare ethosomes containing tea tree oil by hot homogenization method and to evaluate its physical characters and in-vitro release pattern. the preformulation studies were carried out by standard procedure. The morphology of globule was studied by optical microscopy. The globule size and zeta potential was determined by Zetasizer, respectively and in-vitro study was done by diffusion method and the drug content was analyzed by HPTLC method. The release kinetics was also studied by fitting into few mathematical models. All the formulations were showed spherical and unilamellar shape with globule size of 931 to 975 nm, the zeta potential in the range of – 40 to -52 mV and entrapment efficiency was 57 to 65 %. Finally the invitro release studies showed the drug release from the ethosomal vesicles was burst release at initial time followed by sustained release over throughout the study. From the above consideration of evaluation studies, the tea tree oil loaded ethosomal formulation F5 shows best globule size, zeta potential and entrapment efficiency. The sustained action was confirmed by invitro release studies. All the formulations are followed zero order drug release and diffusion type of mechanism of drug releases with Fickian model. Ethosome loaded tea tree oil could be the best choice for topical application
Contact interaction analysis of pion GTMDs
A contact interaction is used to calculate an array of pion twist-two, -three
and -four generalised transverse light-front momentum dependent parton
distribution functions (GTMDs). Despite the interaction's simplicity, many of
the results are physically relevant, amongst them a statement that GTMD size
and shape are largely prescribed by the scale of emergent hadronic mass.
Moreover, proceeding from GTMDs to generalised parton distributions (GPDs), it
is found that the pion's mass distribution form factor is harder than its
electromagnetic form factor, which is harder than the gravitational pressure
distribution form factor; the pressure in the neighbourhood of the pion's core
is commensurate with that at the centre of a neutron star; the shear pressure
is maximal when confinement forces become dominant within the pion; and the
spatial distribution of transversely polarised quarks within the pion is
asymmetric. Regarding transverse momentum dependent distribution functions
(TMDs), their magnitude and domain of support decrease with increasing twist.
The simplest Wigner distribution associated with the pion's twist-two
dressed-quark GTMD is sharply peaked on the kinematic domain associated with
valence-quark dominance; has a domain of negative support; and broadens as the
transverse position variable increases in magnitude.Comment: 20 pages, 12 figures, 1 tabl
Synchronization induced by periodic inputs in finite -unit bistable Langevin models: The augmented moment method
We have studied the synchronization induced by periodic inputs applied to the
finite -unit coupled bistable Langevin model which is subjected to
cross-correlated additive and multiplicative noises. Effects on the
synchronization of the system size (), the coupling strength and the
cross-correlation between additive and multiplicative noises have been
investigated with the use of the semi-analytical augmented moment method (AMM)
which is the second-order moment approximation for local and global variables
[H. Hasegawa, Phys. Rev. E {\bf 67} (2003) 041903]. A linear analysis of the
stationary solution of AMM equations shows that the stability is improved
(degraded) by positive (negative) couplings. Results of the nonlinear bistable
Langevin model are compared to those of the linear Langevin model.Comment: 19 pages, 10 figures, the final version with a changed title,
accepted in Physica
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