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Open access

Changsong Yang and Qi Wang

Abstract

Large errors of low-cost MEMS inertial measurement unit (MIMU) lead to huge navigation errors, even wrong navigation information. An integrated navigation system for unmanned vessel is proposed. It consists of a low-cost MIMU and Doppler velocity sonar (DVS). This paper presents an integrated navigation method, to improve the performance of navigation system. The integrated navigation system is tested using simulation and semi-physical simulation experiments, whose results show that attitude, velocity and position accuracy has improved awfully, giving exactly accurate navigation results. By means of the combination of low-cost MIMU and DVS, the proposed system is able to overcome fast drift problems of the low cost IMU.

Open access

Yue Wang and Qi Guo

Abstract

The deterioration of vestibular function is a side effect of numerous diseases of the inner ear. Vertigo is the most common symptom of vestibular dysfunction. Vestibule-suppressing drugs can control symptoms but impede the rehabilitation of vestibular function. Surgical treatment can effectively resolve vestibular dysfunction associated with some progressive diseases, including tumors. However, unilateral vestibular function remains permanently damaged after surgery, causing problems like vertigo and imbalance. To enhance the understanding of Vestibular rehabilitation therapy, this paper presents a summary of the progress in research on Vestibular rehabilitation therapy for patients with vestibular dysfunction.

Open access

Jing Wang, Qi Zhang and Shilin Wu

Analysis of ATE Measurability Using Information Flow Model

Since many test equipments can't be calibrated conveniently, this paper proposed a new concept named measurability to solve the problem. The measurability is defined, and its indexes are given in detail. Selected from the models of testability, the information flow model is used to analyze the ATE (automatic test equipment) measurability. The correlative matrix of information flow model is decided according to the trace chain. Finally, a practical example is given to show the analysis process.

Open access

Bo Zhou, Jun Wang and Jinfeng Qi

Abstract

The potential of electronic nose to distinguish of wheat seeds was studied. The reproducibility and practicability of electronic nose data was evaluated by repeating the analysis of samples with a time difference of two months. The principle components analysis and linear discriminant analysis were applied to the generated patterns to distinguish the varieties of wheat seeds. The results showed that they could distinguish the wheat varieties properly. The stepwise discriminant analysis and a three-layer backpropagation neural network were developed for pattern prediction models. The results showed that both models could identify the wheat varieties, the back-propagation neural network presented the higher percent of correct classifications in comparison to stepwise discriminant analysis.Moreover, gas chromatographymass spectrometry analysis of the headspaces of same samples confirmed that electronic nose as a powerful tool is able to identify thewheat seeds.

Open access

A. Qi Wang, B. Yanan Wang and C. Furong Lv

Abstract

In order to promote the core competitive power in telecom operating enterprises that face market fine operations, this article compares ECTA mode (Extension Case Transmission Mode) and LCA mode (Loosen Couple Mode). By comparing LCA mode with ECTA mode, we can find out the conditions, in which these two modes are appropriate. Besides, we can keep the semantics of the public flow mode and do our best to modernize the workflow by improving the task complexity, information transparency and operating controllability of LCA mode through a positive feedback system and by improving ECTA mode through a Petri net system.

Open access

Bin Zhang, Wen-hui Lun, Xing-wang Li, Qi Wang, Jun Cheng and Yu Mao

Abstract

Objective To construct prokaryotic expression vector of CFP-10 gene, and obtain recombinant protein, and the recombinant CFP-10 protein was taken as stimulus to detect specific T cell responses, to set up a method to faciliate to detect potential TB infection in China.

Methods CFP-10 was cloned into inducible prokaryotic expression vector pET-32a (+) and transfected into E. coli BL21 (DE3). After IPTG induction, the product were verified with sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and Western blot hybridization were carried out to verify the antigenicity; the recombinant CFP-10 protein was taken as stimulus to detect specific T cell responses in HIV (+) persons with or without clinical manifestation of TB diseases, and HIV (-) controls with or without TB diseases.

Results The CFP-10 recombinant protein exsited in the form of inclusion body and accounted for 94% in total bacterial protein of E. coli and the molecular weight is 31 kD; Western blot confirmed the recombinant proteins had high antigenicity; our in-house ELISpot-IFN-γ assay with recombinant antigen derived from CFP-10 proteins showed significant higher frequencies in TB patients with or without HIV infection than that in the healthy controls and only HIV (+) group.

Conclusions The recombinant CFP-10 genes can be expressed successfully in prokaryotic expression system of E. coli and recombinant proteins with high antigenicity were obtained, which will set foundation for further study on their immunogenicity and bioinformatics. Our results proved that it is indeed true that some HIV positive patient have high frequencies of TB specific T cell responses, which maybe a clue to find latent TB infection in this population.

Open access

Changzheng Gao, Qi Lu, Suxia Guo, Zhenyu Yang, Kulin Li, Qiang Wang and Ruxing Wang

Abstract

Background: High plasma B-type natriuretic peptide (BNP) levels in patients with severe chronic heart failure (CHF) often indicate poor ventricular function and poor prognosis. However, in some such patients plasma BNP levels are normal.

Objective: To investigate the clinical implications of BNP levels in patients with severe CHF.

Methods: Fifty-seven patients with severe CHF were divided into group A (13 normal plasma BNP level) and 44 patients (high plasma BNP levels) group B. Diuretics, angiotensin-converting enzyme inhibitors (or angiotensin II receptor antagonist, e.g., metoprolol) and digitalis were used as conventional treatment. The clinical characteristics of all patients in two groups were analyzed and compared.

Results: At the first admission, left ventricular end diastolic diameter in group B was significantly lower than group A (p < 0.05), and the plasma BNP level in group B was significantly higher than group A (p < 0.05). When metoprolol was used, 6 and 5 patients in group A and B could not tolerate the initial dose. In other cases using metoprolol at average maximum tolerance dose of metoprolol 12.5-6.25 and 24.20-11.22 mg/day in group A and B, respectively, there was a significant difference between them (p < 0.05). There were no significant differences in plasma BNP levels between two groups during stable period. The plasma BNP level in group B during acute worsening stage was significantly higher than in the remission stage (962.73-165.00 ng/L vs 876.24-167.70 ng/L, p < 0.05). However, there was no significant difference between group A (74.03-11.18 ng/L) and group B (71.38-11.68 ng/L) (p > 0.05). The mobility of group A was higher than group B (11/12 vs 6/44, p < 0.05). Logistic regression analysis showed that, the plasma BNP level was the independent risk factor for predicting cardiac death (regression coefficient, 3.817; OR, 45.488; 95% CI, 5.322ʺ388.791).

Conclusion: In patients with severe CHF, normal plasma BNP level suggests depletion of BNP secretion and further deterioration of cardiac function, indicating a poor prognosis.