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CHY formulae in 4d

helicity. If the 4d jacobian Jn;k0 is also positive at the positive region, it strongly supports that the YM amplitude is also positive in some regions. Acknowledgments Yong Zhang thanks S. He and F. Teng

Connected formulas for amplitudes in standard model

Witten’s twistor string theory has led to new representations of S-matrix in massless QFT as a single object, including Cachazo-He-Yuan formulas in general and connected formulas in four dimensions. As a first step towards more realistic processes of the standard model, we extend the construction to QCD tree amplitudes with massless quarks and those with a Higgs boson. For both ...

A data-driven quantitative assessment model for taxi industry: the scope of business ecosystem’s health

Introduction The taxi industry has boomed over the years, both in street-hail and dispatch market. However, few studies focus on comprehensive perspectives, which make decisions such as implementing regulative or incentive policies difficult. As an economic community working in the value-oriented process, the taxi industry requires a holistic performance evaluation to determine how ...

New formulas for amplitudes from higher-dimensional operators

In this paper we study tree-level amplitudes from higher-dimensional operators, including F 3 operator of gauge theory, and R 2, R 3 operators of gravity, in the Cachazo-He-Yuan formulation. As a generalization of the reduced Pfaffian in Yang-Mills theory, we find a new, gauge-invariant object that leads to gluon amplitudes with a single insertion of F 3, and gravity amplitudes by ...

Devosia nitraria sp. nov., a novel species isolated from the roots of Nitraria sibirica in China

An aerobic, Gram-stain negative, short rod-shaped and motile strain, 36-5-1T, was isolated from the roots of Nitraria sibirica in Zhangye city, Gansu province, north-west of China. Phylogenetic analysis based on the 16S rRNA gene sequence and two housekeeping genes (glnA and atpD) indicated that the strain represents a novel species closely related to the Devosia, Rhizobium and ...

Limit properties for ratios of order statistics from exponentials

In this paper, we study the limit properties of the ratio for order statistics based on samples from an exponential distribution and obtain the expression of the density functions, the existence of the moments, the strong law of large numbers for R n i j with 1 ≤ i < j < m n = m . We also discuss other limit theorems such as the central limit theorem, the law of iterated logarithm, ...

Thermodynamical and dynamical properties of charged BTZ black holes

We investigate the spacetime properties of BTZ black holes in the presence of the Maxwell field and Born–Infeld field and find rich properties in the spacetime structures when the model parameters are varied. Employing Landau–Lifshitz theory, we examine the thermodynamical phase transition in the charged BTZ black holes. We further study the dynamical perturbation in the background ...

Experimental investigation on the surface and subsurface damages characteristics and formation mechanisms in ultra-precision grinding of SiC

Surface and subsurface damages appear inevitably in the grinding process, which will influence the performance and lifetime of the machined components. In this paper, ultra-precision grinding experiments were performed on reaction-bonded silicon carbide (RB-SiC) ceramics to investigate surface and subsurface damages characteristics and formation mechanisms in atomic scale. The ...

MITF and PU.1 inhibit adipogenesis of ovine primary preadipocytes by restraining C/EBPβ

Background PU box-binding protein (PU.1) is a master gene of hematopoietic lineage and an important specific transcription factor in osteoclast lineage. There is proof of its expression in adipose tissue, and it is known to significantly and negatively affect adipogenesis. However, it is unclear whether there are any other molecules involved in this process. Methods We wished to ...

Predictions for squeezed back-to-back correlations of \(\phi \phi \) and \(K^+K^-\) in high-energy heavy-ion collisions by event-by-event hydrodynamics

We calculate the squeezed back-to-back correlation (BBC) functions of \(\phi \phi \) and \(K^+K^-\) for heavy-ion collisions at RHIC and LHC energies, using (\(2+1\))-dimensional hydrodynamics with fluctuating initial conditions. The BBC functions averaged over event-by-event calculations for many events for the hydrodynamic sources are smoothed as a function of the particle ...

Complete moment convergence for moving average process generated by ρ − -mixing random variables

Let { Y i , − ∞ < i < ∞ } be a sequence of ρ − -mixing random variables without the assumption of identical distributions, and { a i , − ∞ < i < ∞ } be an absolutely summable sequence of real numbers. In this paper, under some suitable conditions, we establish the complete moment convergence for the partial sum of moving average processes { X n = ∑ i = − ∞ ∞ a i Y i + n , n ≥ 1 } . ...

Synthesis and photoelectrical performance of nanoscale PbS and Bi2S3 co-sensitized on TiO2 nanotube arrays

TiO2 films have been widely applied in photovoltaic conversion techniques. TiO2 nanotube arrays (TiO2 NAs) can be grown directly on the surface of metal Ti by the anodic oxidation method. Bi2S3 and PbS nanoparticles (NPs) were firstly co-sensitized on TiO2 NAs (denoted as PbS/Bi2S3(n)/TiO2 NAs) by a two-step process containing hydrothermal and sonication-assisted SILAR method. When ...

A semi-analytical method and its application for calculating the thermal stress and displacement of sparsely fractured rocks with water flow and heat transfer

Research and Development Program of the Ministry of Science and Technology of China (No. 2013 BAB10B06) ORCID: Yong ZHANG Using Goodier's thermo-elastic displacement potential and Laplace transform, a semi

Formation of diploid and triploid hybrid groupers (hybridization of Epinephelus coioides ♀ × Epinephelus lanceolatus ♂) and their 5S gene analysis

Background Interspecies hybridization is widely used to achieve heterosis or hybrid vigor, which has been observed and harnessed by breeders for centuries. Natural allopolyploid hybrids generally exhibit more superior heterosis than both the diploid progenies and their parental species. However, polyploid formation processes have been long ignored, the genetic basis of heterosis in ...

Association between neutrophilic granulocyte percentage and depression in hospitalized patients with heart failure

Background Previous researches reveal that depression is associated with increased inflammatory markers. As a simple and cheap inflammatory marker, we hypothesize that neutrophilic granulocyte percentage is associated with depression in hospitalized heart failure patients, whose prevalence of depression is at a very high level. Methods Three hundred sixty-six cases of hospitalized ...

A generalization of Morley’s congruence

We establish an explicit formula for q-analog of Morley’s congruence. MSC: 11B68, 11B65, 11B83.

Jacobi orthogonal approximation with negative integer and its application to ordinary differential equations

In this paper, the Jacobi spectral method for ordinary differential equations, which is based on the Jacobi approximation with negative integer, is proposed. This method is very efficient for the initial value problem of ordinary differential equations. The global convergence of proposed algorithm is proved. Numerical results demonstrate the spectral accuracy of this new approach ...

The efficacy of intrauterine injection of human chorionic gonadotropin before embryo transfer in assisted reproductive cycles: Meta-analysis

Objectives A systematic review and meta-analysis to evaluate the effect of human chorionic gonadotropin (hCG) intrauterine injection before embryo transfer on the outcome of in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI).

Isolation of an imported subgenotype B5 strain of human enterovirus A71 in Chongqing City, China, 2014

Background Enterovirus A71 (EV-A71) is the main pathogen responsible for large outbreaks of hand, foot, and mouth disease (HFMD) in mainland China, and the dominant EV-A71 strains belong to subgenotype C4. To date, only one imported subgenotype B5 of EV-A71 has been reported in Xiamen City Fujian Province, 2009. Results Here, we report on another imported subgenotype B5 of EV-A71 ...