An embedding technique to determine ττ backgrounds in proton-proton collision data

An embedding technique is presented to estimate standard model tau tau backgrounds from data with minimal simulation input. In the data, the muons are removed from reconstructed mu mu events and replaced with simulated tau leptons with the same kinematic properties. In this way, a set of hybrid events is obtained that does not rely on simulation except for the decay of the tau leptons. The challenges in describing the underlying event or the production of associated jets in the simulation are avoided. The technique described in this paper was developed for CMS. Its validation and the inherent uncertainties are also discussed. The demonstration of the performance of the technique is based on a sample of proton-proton collisions collected by CMS in 2017 at root s = 13 TeV corresponding to an integrated luminosity of 41.5 fb(-1).Peer reviewe

Performance of missing transverse momentum reconstruction in proton-proton collisions at root s=13 TeV using the CMS detector

The performance of missing transverse momentum ((p) over right arrow (miss)(T)) reconstruction algorithms for the CMS experiment is presented, using proton-proton collisions at a center-of-mass energy of 13 TeV, collected at the CERN LHC in 2016. The data sample corresponds to an integrated luminosity of 35.9 fb(-1). The results include measurements of the scale and resolution of (p) over right arrow (miss)(T), and detailed studies of events identified with anomalous (p) over right arrow (miss)(T). The performance is presented of a (p) over right arrow (miss)(T) reconstruction algorithm that mitigates the effects of multiple proton-proton interactions, using the "pileup per particle identification" method. The performance is shown of an algorithm used to estimate the compatibility of the reconstructed (p) over right arrow (miss)(T) with the hypothesis that it originates from resolution effects.Peer reviewe

Research on knowledge service oriented expert management system

The distinctive characteristics of knowledge service oriented expert management system needs to have instant, on-demand service, accurate service, comprehensive services, and personalized service. In order to meet the requirements of the establishment of this system, this paper studied the construction of expert resources and expert retrieval services, and The crowdsourcing technology-based open expert body build, experts of different heterogeneous data sources access to information based expert body interaction semantics expert retrieval method. © (2014) Trans Tech Publications, Switzerland.The distinctive characteristics of knowledge service oriented expert management system needs to have instant, on-demand service, accurate service, comprehensive services, and personalized service. In order to meet the requirements of the establishment of this system, this paper studied the construction of expert resources and expert retrieval services, and The crowdsourcing technology-based open expert body build, experts of different heterogeneous data sources access to information based expert body interaction semantics expert retrieval method. © (2014) Trans Tech Publications, Switzerland

Image-based non-photorealistic rendering for realtime virtual sculpting

This paper discusses a real-time virtual sculpting system in a non-photorealistic manner. Up till now, a majority of researchers pursuing virtual sculpting have highlighted the physical fidelity of simulation, with approaches for realizing photorealism being principal specialized contributions. We aim at capitalizing on the strengths of non-photorealistic rendering with respect to aesthetics, expression and computing expense. By means of touch-enabled manipulation, the haptic interaction is conducted to form the deformable surfaces, and the edge extraction is employed to stress boundaries. Afterwards, we utilize anisotropic diffusion to lessen unimportant details as well as a fresh inverse Gaussian bilateral filter for spot removal. Processed in a spatiotemporal style, the non-photorealistic rendering works to maintain coherence in time. Moreover, the parallel realization of the system put forward on graphics hardware (GPU) guarantees real-time behavior. © 2014 Springer Science+Business Media New York.This paper discusses a real-time virtual sculpting system in a non-photorealistic manner. Up till now, a majority of researchers pursuing virtual sculpting have highlighted the physical fidelity of simulation, with approaches for realizing photorealism being principal specialized contributions. We aim at capitalizing on the strengths of non-photorealistic rendering with respect to aesthetics, expression and computing expense. By means of touch-enabled manipulation, the haptic interaction is conducted to form the deformable surfaces, and the edge extraction is employed to stress boundaries. Afterwards, we utilize anisotropic diffusion to lessen unimportant details as well as a fresh inverse Gaussian bilateral filter for spot removal. Processed in a spatiotemporal style, the non-photorealistic rendering works to maintain coherence in time. Moreover, the parallel realization of the system put forward on graphics hardware (GPU) guarantees real-time behavior. © 2014 Springer Science+Business Media New York

Accurate gaze tracking from single camera using gabor corner detector

Most of the existing gaze tracking schemes with high accuracy and high speed depend on infra-red (IR) lights and multi-cameras, which leads to high complexity of apparatus and high cost. Besides, many proposed approaches hardly offer a full discussion and solution of eye blink issue. In this paper, we propose a novel gaze tracking scheme which is capable of tracking eye movements in high accuracy. Our scheme incorporates the eye corner information extracted using a novel eye corner detector. This detector is developed based on the Gabor Wavelet Transform and the Structure Tensor. Gabor Wavelet Transform decomposes an image in multi-scales and multi-orientations, thus is robust against lighting variation and tiny shift. We abstract the distribution statistics of the feature points in the eye region and re-express it as a connectivity graph. Based on such abstraction we propose a novel solution to the eye blink issue which obtains a high successful detection rate. After implementation, our scheme is proven to be accurate compared with the state of the art. Notably, only one web camera is employed in our scheme without any auxiliary light source or cameras.Most of the existing gaze tracking schemes with high accuracy and high speed depend on infra-red (IR) lights and multi-cameras, which leads to high complexity of apparatus and high cost. Besides, many proposed approaches hardly offer a full discussion and solution of eye blink issue. In this paper, we propose a novel gaze tracking scheme which is capable of tracking eye movements in high accuracy. Our scheme incorporates the eye corner information extracted using a novel eye corner detector. This detector is developed based on the Gabor Wavelet Transform and the Structure Tensor. Gabor Wavelet Transform decomposes an image in multi-scales and multi-orientations, thus is robust against lighting variation and tiny shift. We abstract the distribution statistics of the feature points in the eye region and re-express it as a connectivity graph. Based on such abstraction we propose a novel solution to the eye blink issue which obtains a high successful detection rate. After implementation, our scheme is proven to be accurate compared with the state of the art. Notably, only one web camera is employed in our scheme without any auxiliary light source or cameras

The patient-reported outcome of age-related cataract using Catquest-8SF questionnaire

AIM: To assess the patient-reported outcome of phacoemulsification with posterior chamber single focus foldable intraocular lens(SIOL)using the Chinese version of Catquest-8SF questionnaire. We would mainly evaluate the applicability of Catquest-8SF scale in northern Chinese and evaluate its sensitivity to cataract surgery.METHODS:Prospective clinical case follow-up study. The patients were recruited from The Central Hospital of Tai'an and completed the Catquest-8SF questionnaire by face-to-face interviews before and 3mo after surgery at the hospital.RESULTS: A total of 120 cataract patients completed the Catquest-8SF at baseline. The preoperative score of the Catquest-8SF-CN had a significant negative correlation with preoperative binocular mean weighted logMAR visual acuity and age(PPPt=10.404, PPPCONCLUSION: The Chinese version of Catquest-8SF questionnaire is suitable for the age-related cataract population in northern China. It is highly responsive to cataract surgery and brief, so it may have the potential to become part of a routine clinical assessment for cataract surgery in China