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A combinatoric shortcut to evaluate CHY-forms

In our recent work, we proposed a differential operator for the evaluation of the multi-dimensional residues on isolated (zero-dimensional) poles. In this paper we discuss some new insight on evaluating the (generalized) Cachazo-He-Yuan (CHY) forms of the scattering amplitudes using this differential operator. We introduce a tableau represen-tation for the coefficients appearing in ...

Biquaternion beamspace with its application to vector-sensor array direction findings and polarization estimations

include array signal processing and biquaternion with applications in signal processing and image processing. Feng Xu received the Ph.D. degree in electronic engineering from Fudan University, Shanghai

A differential operator for integrating one-loop scattering equations

We propose a differential operator for computing the residues associated with a class of meromorphic n-forms that frequently appear in the Cachazo-He-Yuan form of the scattering amplitudes. This differential operator is conjectured to be uniquely determined by the local duality theorem and the intersection number of the divisors in the n-form. We use the operator to evaluate the ...

Facile isothermal solid acid catalyzed ionic liquid pretreatments to enhance the combined sugars production from Arundo donax Linn.

Ruizhen Wang 0 Liming Zhang 0 Feng Xu 0 0 Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University , Beijing 100083 , China Background: Solid acid catalyzed inexpensive ionic liquid

Understanding positive feedback between PNA and synoptic eddies by eddy structure decomposition method

In the upper troposphere during winter, positive synoptic eddy (SE) feedback plays an indispensible role in maintaining the Pacific–North American (PNA) pattern that dominates climate variability on inter-annual timescales over the North Pacific and downstream regions. This study shows that the eddy forcing, induced by eddy-vorticity (EV) fluxes, is not only in-phase with, but also ...

Scale-up and process integration of sugar production by acidolysis of municipal solid waste/corn stover blends in ionic liquids

Background Lignocellulosic biorefineries have tonnage and throughput requirements that must be met year round and there is no single feedstock available in any given region that is capable of meeting the price and availability demands of the biorefineries scheduled for deployment. Significant attention has been historically given to agriculturally derived feedstocks; however, a ...

Insight into G-quadruplex-hemin DNAzyme/RNAzyme: adjacent adenine as the intramolecular species for remarkable enhancement of enzymatic activity

G-quadruplex (G4) with stacked G-tetrads structure is able to bind hemin (iron (III)-protoporphyrin IX) to form a unique type of DNAzyme/RNAzyme with peroxidase-mimicking activity, which has been widely employed in multidisciplinary fields. However, its further applications are hampered by its relatively weak activity compared with protein enzymes. Herein, we report a unique ...

Role-playing is an effective instructional strategy for genetic counseling training: an investigation and comparative study

, People's Republic of China 1 Authors' information Xiao-feng Xu, Ph.D. Associate Professor, Department of Medical Genetics, Third Military Medical University , Chongqing 400038 , People's Republic of China 2

Coexistence of pulmonary lymphangioleiomyomatosis and pulmonary angiomyolipoma

Background Lymphangioleiomyomatosis (LAM) and angiomyolipoma are two different, but related rare diseases. To the best of our knowledge, pulmonary LAM and pulmonary angiomyolipoma have not previously been observed in the same patient. Case presentation A 38-year-old woman presented with a dry cough and left flank pain. She had a right nephrectomy for renal angiomyolipoma 17 years ...

Dendritic cells during Staphylococcus aureus infection: subsets and roles

Xuejie Wu 0 Feng Xu 0 0 Department of Infectious Diseases, Second Affiliated Hospital, Zhejiang University School of Medicine , Hangzhou 310009 , China Dendritic cells (DCs) are professional

Reducing surgical levels by paraspinal mapping and diffusion tensor imaging techniques in lumbar spinal stenosis

Background Correlating symptoms and physical examination findings with surgical levels based on common imaging results is not reliable. In patients who have no concordance between radiological and clinical symptoms, the surgical levels determined by conventional magnetic resonance imaging (MRI) and neurogenic examination (NE) may lead to a more extensive surgery and significant ...

ACFIS: a web server for fragment-based drug discovery

In order to foster innovation and improve the effectiveness of drug discovery, there is a considerable interest in exploring unknown ‘chemical space’ to identify new bioactive compounds with novel and diverse scaffolds. Hence, fragment-based drug discovery (FBDD) was developed rapidly due to its advanced expansive search for ‘chemical space’, which can lead to a higher hit rate and ...

Genetic association of Toll-like receptor 4 gene and coronary artery disease in a Chinese Han population

Purpose Toll-like receptor 4 (TLR4) is known to be involved in innate immunity and inflammatory responses that play important roles in the pathogenesis of coronary artery disease (CAD). But the relationship between TLR4 gene and CAD has yet to be investigated. The present study aimed to evaluate the association of TLR4 gene polymorphisms with CAD susceptibility in a Chinese Han ...

Clinico-pathological characteristics and outcomes of patients with biopsy-proven hypertensive nephrosclerosis: a retrospective cohort study

Background This study aimed to investigate renal outcomes and their predictors in biopsy-proven hypertensive nephrosclerosis (HN) patients and to compare clinico-pathological characteristics and prognoses between benign nephrosclerosis (BN) and malignant nephrosclerosis (MN) patients. Methods Data for biopsy-proven HN patients were retrospectively analyzed. Renal survival rates and ...

A comparative study of ChIP-seq sequencing library preparation methods

Camilli Yap C. Chew Catherine Couture Andrew Farmer John P. Jerome David W. Lazinski Andrew McUsic Xu Peng Kamran Shazand Feng Xu Robert Lyle 0 Gregor D. Gilfillan 0 0 Department of Medical Genetics, Oslo

FoxC2 Enhances BMP7-Mediated Anabolism in Nucleus Pulposus Cells of the Intervertebral Disc

Bone-morphogenetic protein-7 (BMP-7) is a growth factor that plays a major role in mediating anabolism and anti-catabolism of the intervertebral disc matrix and cell homeostasis. In osteoblasts, Forkhead box protein C2 (FoxC2) is a downstream target of BMPs and promotes cell proliferation and differentiation. However, the role FoxC2 may play in degenerative human intervertebral ...

Internal control, related party transactions and corporate value of enterprises directly controlled by Chinese central government

State-owned enterprises (SOEs) play a crucial role in China's economy. Those directly controlled by the central government (CSOEs) take leading positions almost in all industries in China. In this paper, we analyse the impacts of internal control quality of CSOEs on related party transactions and corporate value of CSOEs after the Chinese government introduced regulatory changes ...

A novel information transferring approach for the classification of remote sensing images

Fengchen Huang 0 Feng Xu 0 0 College of Computer and Information Engineering, Hohai University , Xikang Road No.1, 210098 Nanjing , China Traditional remote sensing images classification methods focused on

Acetylome Analysis Identifies SIRT1 Targets in mRNA-Processing and Chromatin-Remodeling in Mouse Liver

acknowledge Dr. Michael Meaney for critical reading of this manuscript. We would also like to thank the members of the Feng Xu laboratory for their critical comments and discussion throughout this work

Purification of Bone Marrow Clonal Cells from Patients with Myelodysplastic Syndrome via IGF-IR

Malignant clonal cells purification can greatly benefit basic and clinical studies in myelodysplastic syndrome (MDS). In this study, we investigated the potential of using type 1 insulin-like growth factor receptor (IGF-IR) as a marker for purification of malignant bone marrow clonal cells from patients with MDS. The average percentage of IGF-IR expression in CD34+ bone marrow ...