Reweighted lp Constraint LMS-Based Adaptive Sparse Channel Estimation for Cooperative Communication System

This paper studies the issue of sparsity adaptive channel reconstruction in time-varying cooperative communication networks through the amplify-and-forward transmission scheme. A new sparsity adaptive system identification method is proposed, namely reweighted norm ( < < ) penalized least mean square（LMS）algorithm. The main idea of the algorithm is to add a norm penalty of sparsity into the cost function of the LMS algorithm. By doing so, the weight factor becomes a balance parameter of the associated norm adaptive sparse system identification. Subsequently, the steady state of the coefficient misalignment vector is derived theoretically, with a performance upper bounds provided which serve as a sufficient condition for the LMS channel estimation of the precise reweighted norm. With the upper bounds, we prove that the ( < < ) norm sparsity inducing cost function is superior to the reweighted norm. An optimal selection of for the norm problem is studied to recover various sparse channel vectors. Several experiments verify that the simulation results agree well with the theoretical analysis, and thus demonstrate that the proposed algorithm has a better convergence speed and better steady state behavior than other LMS algorithms

Efficient and effective state-based framework for news video retrieval

In this paper, an efficient and effective framework is proposed for news video retrieval. Firstly, the 64-dimensional colour histogram is extracted as the feature vector. Then the pair quantizer is adopted to transfer the news video retrieval problem into multi-dimensional string matching problem, which conduces to the efficiency to the framework. Secondly, a new measurement named ‘optimal temporal common subsequence’, which distinguishes the difference caused by rich temporal characteristics including temporal order, temporal duration and temporal gap, is designed to match state-sequence, followed by the point & interval-based formal characterization of time-series and state-sequences. Thirdly, we tested the proposed measurement on news video retrieval. The performance shows the proposed algorithm is more effective for news video retrieval

Experimental measurements of bulk modulus for two types of hydraulic oil at pressures to 140MPa and temperatures to 180°C

Bulk modulus of hydraulic oil represents the resistance of hydraulic oil to compression and is the reciprocal of compressibility. The bulk modulus is a basic thermodynamic property of hydraulic oil that has a very important influence on work efficiency and dynamic characteristics of hydraulic systems, especially for the hydraulic systems at ultra-high pressure or ultra-high temperature. In this study, a bulk modulus experimental equipment for hydraulic oil was designed and manufactured, two types of hydraulic oil were selected and its isothermal secant bulk modulus were measured at pressures to 140MPa and temperatures of 20~180°C. Compared the experimental results with the calculated results from the prediction equations of liquid bulk modulus that proposed by Klaus, Hayward, and Song, it is found that the experimental results are not completely identical with the calculated results

Electrical transport across metal/two-dimensional carbon junctions: Edge versus side contacts

Metal/two-dimensional carbon junctions are characterized by using a nanoprobe in an ultrahigh vacuum environment. Significant differences were found in bias voltage (V) dependence of differential conductance (dI/dV) between edge- and side-contact; the former exhibits a clear linear relationship (i.e., dI/dV \propto V), whereas the latter is characterized by a nonlinear dependence, dI/dV \propto V3/2. Theoretical calculations confirm the experimental results, which are due to the robust two-dimensional nature of the carbon materials under study. Our work demonstrates the importance of contact geometry in graphene-based electronic devices

IRF2BP2 attenuates gestational diabetes mellitus by activating AMPK signaling

Purpose: To investigate the role of interferon regulatory factor 2 binding protein 2 (IRF2BP2) in gestational diabetes mellitus (GDM). Methods: Mice were injected intraperitoneally with streptozotocin to establish a model of GDM and then subjected to intraperitoneal glucose tolerance test (IPGTT) and intraperitoneal insulin tolerance test (IPITT) to determine glucose and insulin tolerances. Lipid metabolism was evaluated by enzyme-linked immunosorbent assay (ELISA). The histomorphology of pancreatic islets was assessed by hematoxylin and eosin staining. Results: IRF2BP2 was downregulated in pancreatic tissues of mice with GDM (p &lt; 0.001). Mice in GDM group showed higher blood glucose levels than those in normal pregnancy group. However, overexpression of IRF2BP2 reduced glucose and insulin levels in mice with GDM. Overexpression of IRF2BP2 increased the level of high-density lipoprotein (HDL) and reduced triglyceride (TG), total cholesterol (TC), and low-density lipoprotein (LDL) levels in mice with GDM (p &lt; 0.001). The histopathological changes in the islets of mice with GDM were also ameliorated by overexpression of IRF2BP2. Overexpression of IRF2BP2 reduced IL-6, IL-1β, and TNF-α levels and increased protein expression of p-AMPK in mice with GDM. Conclusion: IRF2BP2 ameliorates the outcomes of GDM and suppressed inflammation in mice with GDM through activation of AMPK signaling. Thus, IRF2BP2 is a potential therapeutic strategy for the management of GDM. Keywords: IRF2BP2; inflammation; gestational diabetes mellitus; AMPK; mice; insulin toleranc

The Organic Amendment Improve the Yield and Quality of Vegetable

Using biotechnology, we can change agricultural wastes into high‐quality organic fertilizers, which leads us in the direction of the development in modern agriculture and act as substitute to the chemical fertilizers. In this chapter, five types of technologies of organic amendment are elaborated. Each method can be selected based on the specific circumstance. The effects of the technology in the production are introduced and the principles of the technologies are explained in a simple manner

Analysis of RIG-I-mediated innate immune response in rats with Kidney-Yang Deficiency Syndrome and its change following Yougui pill administration

350-359Kidney-Yang Deficiency Syndrome (KYDS) is closely bound up with the immune response of immunocompromised patients. The study is to investigate whether retinoic acid-inducible gene-I (RIG-I)-mediated innate immune response participates in the development of KYDS in rats and evaluate the effect of Yougui pill (YGP) on the response in KYDS rats. KYDS rats were induced by intramuscular injection of hydrocortisone at the dose of 10 mg/kg/d for 15 days. YGP at concentrations of 2.43 g/kg/d and 4.86 g/kg/d were administered intragastrically to KYDS rats for 30 days. The results showed that the body weight, urinary 17-hydroxycorticosteroid (17-OHCS) level, spleen size and spleen index in KYDS rats were significantly decreased compared with healthy control rats, while YGP treatment reversed them towards normal level in a dose-dependent manner. Moreover, KYDS challenge not only strikingly increased the mRNA and protein expression levels of RIG-I, tripartite motif containing 25 (TRIM25), tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) but also markedly enhanced the endogenous RIG-I polyubiquitination levels. Whereas, YGP treatment effectively reversed this tendency in a dose-dependent manner. In conclusion, these findings revealed that RIG-I-mediated innate immune response was closely bound up with the development of KYDS. And YGP exhibited certain anti-inflammatory effects on KYDS rats via inhibiting the RIG-I-mediated innate immune response

Analysis of RIG-I-mediated innate immune response in rats with Kidney-Yang Deficiency Syndrome and its change following Yougui pill administration

Kidney-Yang Deficiency Syndrome (KYDS) is closely bound up with the immune response of immunocompromised patients. The study is to investigate whether retinoic acid-inducible gene-I (RIG-I)-mediated innate immune responseparticipates in the development of KYDS in rats and evaluate the effect of Yougui pill (YGP) on the response in KYDS rats. KYDS rats were induced by intramuscular injection of hydrocortisone at the dose of 10 mg/kg/d for 15 days. YGP at concentrations of 2.43 g/kg/d and 4.86 g/kg/d were administered intragastrically to KYDS rats for 30 days. The resultsshowed that the body weight, urinary 17-hydroxycorticosteroid (17-OHCS) level, spleen size and spleen index in KYDS rats were significantly decreased compared with healthy control rats, while YGP treatment reversed them towards normal level in a dose-dependent manner. Moreover, KYDS challenge not only strikingly increased the mRNA and protein expression levels of RIG-I, tripartite motif containing 25 (TRIM25), tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) but alsomarkedly enhanced the endogenous RIG-I polyubiquitination levels. Whereas, YGP treatment effectively reversed this tendency in a dose-dependent manner. In conclusion, these findings revealed that RIG-I-mediated innate immune response was closely bound up with the development of KYDS. And YGP exhibited certain anti-inflammatory effects on KYDS rats via inhibiting the RIG-I-mediated innate immune response