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189 papers found.
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Pilot contamination reduction in massive MIMO systems based on pilot scheduling

The pilot contamination caused by sharing the non-orthogonal pilots among users is considered to be a bottleneck of the massive multi-input multi-output (MIMO) systems. This paper proposes a pilot scheduling scheme based on the degradation to address this problem. Through computing the degradation of the users, the proposed scheduling assigns the optimal pilot sequence to the...

Progression of the Radiologic Severity Index predicts mortality in patients with parainfluenza virus-associated lower respiratory infections

Sheshadri, Dimpy P. Shah, Myrna Godoy, Jeremy J. Erasmus, Juhee Song, Liang Li, Scott E. Evans, Roy F. Chemaly, David E. Ost. Formal analysis: Ajay Sheshadri, Dimpy P. Shah, Myrna Godoy, Jeremy J. Erasmus ... , Juhee Song, Liang Li, Scott E. Evans, Roy F. Chemaly, David E. Ost. Funding acquisition: David E. Ost. Investigation: Ajay Sheshadri, Dimpy P. Shah, Myrna Godoy, Scott E. Evans, Roy F. Chemaly, Burton

Experimental study on chip deformation of Ti-6Al-4V titanium alloy in cryogenic cutting

This paper first develops a cryogenic cutting system with adjustable jet temperature (− 196~20 °C), and then carries out a series of dry cutting and cryogenic turning experiments for titanium alloy. Metallographic microscope is used to observe the chip morphology of titanium alloy and the geometric characteristic parameters of the chip are measured using a Digimizer image...

Transcriptome analysis revealed the possible regulatory pathways initiating female geese broodiness within the hypothalamic-pituitary-gonadal axis

analysis: Liang Li, Chunchun Han. Funding acquisition: Hehe Liu, Jiwen Wang. Investigation: Hehe Liu, Liang Li, Chunchun Han. Methodology: Liang Li, Chunchun Han, Hua He. Project administration: Hehe Liu ... , Jiwen Wang. Resources: Liang Li, Chunchun Han, Hua He, Hengyong Xu. Software: Liang Li, Chunchun Han, Hua He, Hengyong Xu. Supervision: Hehe Liu, Jiwen Wang. 15 / 18 Validation: Liang Li, Chunchun Han

A europium(III) metal-organic framework as ratiometric turn-on luminescent sensor for Al3+ ions

Xinhui Zhou Jiahui Cheng Liang Li Qiang Chen Yujian You Hongping Xiao Wei Huang mater.scichina.com link.springer.com . . . . . . . . . . . . . . . . . . . . Published online 10 January 2018 | https

Performance analysis on joint channel decoding and state estimation in cyber-physical systems

We propose to use an mean square error (MSE) transfer chart to evaluate the performance of the proposed belief propagation (BP)-based channel decoding and state estimation scheme. We focus on two models to evaluate the performance of BP-based channel decoding and state estimation: the sequential model and the iterative model. The numerical results show that the MSE transfer chart...

Transcriptome using Illumina sequencing reveals the traits of spermatogenesis and developing testes in Eriocheir sinensis

Chinese mitten crab (Eriocheir sinensis) has the spermatozoa with typical aflagellate, decondensed chromatin, cup-shaped nuclei, and radial arms. However, the mechanism of spermatogenesis during which the specific spermatozoa are generated in this species is yet unclear. Here, the transcriptome of developing testis in E. sinensis was analyzed using the ways of RNA-seq and...

Direction-of-arrival estimation of multipath signals using independent component analysis and compressive sensing

. Formal analysis: Jian Xu. Funding acquisition: Lin Zhao, Jicheng Ding, Liang Li. Investigation: Jian Xu, Aimeng Liu. 15 / 17 Methodology: Jian Xu, Jicheng Ding. Project administration: Jicheng Ding ... , Liang Li. Resources: Lin Zhao, Jian Xu, Jicheng Ding. Software: Jian Xu, Jicheng Ding. Supervision: Lin Zhao, Jicheng Ding, Liang Li. Validation: Jian Xu, Jicheng Ding, Aimeng Liu. Visualization

Peritoneum as the sole distant metastatic site of lung adenosquamous cell carcinoma: a case report

Peritoneum metastasis of lung cancer is a rare event which, in addition to the peritoneum, usually involves multiple metastatic tissues. Here we report a case of a patient with lung adenosquamous cell carcinoma with the peritoneum as the sole distant metastatic site. An 82-year-old Han Chinese man, in the teaching profession, was diagnosed with lung adenosquamous cell carcinoma...

Numerical analysis of propeller exciting force in oblique flow

CFD commercial software FLUENT, based on solving RANS equations, was used to calculate propeller hydrodynamic performance and exciting force. Sliding grid technique was applied to simulate the propeller rotation. Different advance coefficients and oblique inflow angles were set as different working conditions through adjusting inflow magnitude and direction. DTMB4679 propeller as...

Laparoscopic sleeve gastrectomy improves body composition and alleviates insulin resistance in obesity related acanthosis nigricans

Acanthosis nigricans (AN) has a close relationship with obesity. It is believed that obesity and AN have the common pathophysiological basis such as hyperinsulinism. This study is aimed to observe the effect of laparoscopic sleeve gastrectomy (LSG) on body composition and insulin resistance in Chinese obese patients with acanthosis nigricans. A total of 37 obese patients who...

Association between Allogeneic or Autologous Blood Transfusion and Survival in Patients after Radical Prostatectomy: A Systematic Review and Meta-Analysis

and irrelevant articles. Data extraction Two investigators (Yun Ye and Su-liang Li) independently extracted the data from all eligible publications. Any controversy was resolved by discussion with the ... ) guidelines [ 14 ], two independent authors (Yun Ye and Su-Liang Li) evaluated the quality of the included retrospective studies. The scale focuses on three factors: (1) subject selection: 0±4, (2) inter

On the Bethe states of the one-dimensional supersymmetric t − J model with generic open boundaries

By combining the algebraic Bethe ansatz and the off-diagonal Bethe ansatz, we investigate the supersymmetric t − J model with generic open boundaries. The eigenvalues of the transfer matrix are given in terms of an inhomogeneous T − Q relation, and the corresponding eigenstates are expressed in terms of nested Bethe states which have welldefined homogeneous limit. This exact...

Responses of Nucleus Tractus Solitarius (NTS) early and late neurons to blood pressure changes in anesthetized F344 rats

Previously, many different types of NTS barosensitive neurons were identified. However, the time course of NTS barosensitive neuronal activity (NA) in response to arterial pressure (AP) changes, and the relationship of NA-AP changes, have not yet been fully quantified. In this study, we made extracellular recordings of single NTS neurons firing in response to AP elevation induced...

Paravertebral Block Plus Thoracic Wall Block versus Paravertebral Block Alone for Analgesia of Modified Radical Mastectomy: A Retrospective Cohort Study

kg/m2; and the female sex. To ensure standardized operation and anesthetic techniques, we enrolled patients operated by a single surgeon (Ben Long Yu) and anesthesiologist (Nai Liang Li). A ... Nai Liang Li from June 1, 2012, to May 31, 2015. All patients were women with an ASA classification of I–III. Two patients were excluded because they were aged >75 years on the surgery day; six patients

Rhythmic expression of circadian clock genes in the preovulatory ovarian follicles of the laying hen

The circadian clock is reported to play a role in the ovaries in a variety of vertebrate species, including the domestic hen. However, the ovary is an organ that changes daily, and the laying hen maintains a strict follicular hierarchy. The aim of this study was to examine the spatial-temporal expression of several known canonical clock genes in the granulosa and theca layers of...

Quantitative Proteomic Profiling of Early and Late Responses to Salicylic Acid in Cucumber Leaves

Salicylic acid (SA) is an important phytohormone that plays vital regulatory roles in plant growth, development, and stress responses. However, studies on the molecular mechanism of SA, especially during the early SA responses, are lagging behind. In this study, we initiated a comprehensive isobaric tag for relative and absolute quantitation (iTRAQ)-based proteomic analysis to...

TNF-α -308 A allele is associated with an increased risk of distant metastasis in rectal cancer patients from Southwestern China

Tumor necrosis factor-α (TNF-α), an important factor in systematic inflammation, is reportedly involved in several cancer types. The TNF-α -308 G>A (rs1800629) polymorphism in the promoter region influences TNF-α production. The association between TNF-α -308 G>A polymorphism and colorectal cancer (CRC) is not fully understood, especially the connections between TNF-α -308 G>A...