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WU, GANG,KIM, YOUNG HEE The Korean Society for Computational and Applied M 2018 Journal of applied mathematics & informatics Vol.36 No.1
In this paper, we introduce the notions of pregroups, post-groups and pre-B-algebras, and we investigate their relations. Using this notions we give another proof that the notion of B-algebras coincides with the notion of pregroups.
Gang Wu,Run-Ying Dai,Weigang Li,Pei-Pei Yin,Hongzheng Chen,Mang Wang 한국물리학회 2011 Current Applied Physics Vol.11 No.3
Elastic and optical transparent microcapsules with ultra-thin and compact capsule wall for electrophoretic display containing tetrachloroethylene as core material were prepared from gelatin (GE), sodium lauryl sulfonate (SLS) and sodium carboxymethylcellulose (NaCMC) by complex coacervation method. Microcapsules were characterized by scanning electron microscopy, optical microscopy, and thermogravimetric analysis. The pH value influenced formation process was monitored by recording the microstructure of the fragment of the capsules formed at different pH value. Products with branch-like structure formed with the decrease of pH value, by which the capsule wall was knitted up to form compact structure. SLS was found to play an important role in the course of capsule formation, i.e. SLS helped to increase the interaction between gelatin and NaCMC and facilitate the complex coacervation reaction. In the case of 1.0 mM SLS addition, GE/NaCMC/SLS microcapsules with ultra-thin capsule wall,200 nm in thickness, can be prepared. The capsule owns high thermal stability and good barrier property,both of which prevent core materials from penetrating outside the capsules and are favor of the practical application for the capsules in areas of electrophoretic displays.
Gang Wu,Ke Zhang 한국항공우주학회 2022 International Journal of Aeronautical and Space Sc Vol.23 No.3
In this paper, a novel three-dimensional fixed-time convergence guidance law for intercepting highly maneuvering targets is proposed. It comprehensively considers the impact angle constraint, guidance command input saturation constraint, and autopilot second-order dynamics. The guidance law is firstly designed based on a novel fixed-time convergent sliding mode surface proposed in this paper. Then, a backstepping control method is adopted for consideration of autopilot second-order dynamics. By constructing an adaptive auxiliary system, the problem of guidance command input saturation is solved. Additionally, the fixed-time convergence disturbance observer is used to estimate the guidance system disturbance. Using the Lyapunov theory, the stability and fixed-time convergence of the proposed guidance law are proved and analyzed. Finally, the simulation comparison of four different guidance laws shows the excellent guidance performance of the proposed guidance law.
HYERS-ULAM STABILITY OF DERIVATIONS IN FUZZY BANACH SPACE: REVISITED
Gang Lu,Yuanfeng Jin,Gang Wu,Sungsik Yun 한국수학교육학회 2018 純粹 및 應用數學 Vol.25 No.2
Lu et al. [27] dened derivations on fuzzy Banach spaces and fuzzy Lie Banach spaces and proved the Hyers-Ulam stability of derivations on fuzzy Banach spaces and fuzzy Lie Banach spaces. It is easy to show that the denitions of derivations on fuzzy Banach spaces and fuzzy Lie Banach spaces are wrong and so the results of [27] are wrong. Moreover, there are a lot of seroius problems in the statements and the proofs of the results in Sections 2 and 3. In this paper, we correct the denitions of biderivations on fuzzy Banach algebras and fuzzy Lie Banach algebras and the statements of the results in [27], and prove the corrected theorems.
Gang Wu,김영희 한국전산응용수학회 2018 Journal of applied mathematics & informatics Vol.36 No.1
In this paper, we introduce the notions of pregroups, postgroups and pre-$B$-algebras, and we investigate their relations. Using this notions we give another proof that the notion of $B$-algebras coincides with the notion of pregroups.
Radio Resource Management for TD-SCDMA and Evolved TDD: A Survey
Gang Wu 에스케이텔레콤 (주) 2009 Telecommunications Review Vol.19 No.3
In Time-division Duplex Synchronous Code-Division Multiple Access (TD-SCDMA) systems, inherent channel reciprocity and usage of smart antenna and multi-user detection have distinct effect on Radio Resource Management (RRM) strategy compared to Frequency-Division Duplex (FDD) 3G cellular systems. Moreover, along the evolution road of TD-SCDMA, RRM strategy also adapts to the evolved network architecture and some emerging techniques, such as Multiple-Input Multiple-Output (MIMO), Orthogonal Frequency-Division Multiplexing (OFDM), and cooperative relaying transmission, etc. This paper reviews and presents latest results on RRM issues for TD-SCDMA and evolved TDD systems, such as TD-SCDMA via High Speed Downlink Packet Access (HSDPA) or High Speed Uplink Packet Access (HSUPA), and Long Term Evolution (LTE) TDD system. Firstly, basic functions and algorithms of RRM for TD-SCDMA are introduced. Then the impact of evolution on RRM strategies is analyzed. Finally, several open problems related to RRM algorithms caused by these evolutions are indicated.
Wu, Ting-Ting,Wang, Zhi-Gang,Ou, Wu-Ling,Wang, Jun,Yao, Guo-Qing,Yang, Bo,Rao, Zhi-Guo,Gao, Jian-Fei,Zhang, Bi-Cheng Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.24
Background: The study aimed to investigate the analgesic effect of a combination of intravenous flurbiprofen axetil and opioids, and evaluate the relationship between refractory pain relief and plasma ${\beta}$-endorphin levels in cancer patients. Materials and Methods: A total of 120 cancer patients was randomly divided into two groups, 60 patients took orally morphine sulfate sustained-release tablets in group A, and another 60 patients receiving the combination treatment of intravenous flurbiprofen axetil and opioid drugs in group B. After 7 days, pain relief, quality of life improvement and side effects were evaluated. Furthermore, plasma ${\beta}$-endorphin levels were measured by radioimmunoassay. Results: With the combination treatment of intravenous intravenous flurbiprofen axetil and opioids, the total effective rate of pain relief rose to 91.4%, as compared to 82.1% when morphine sulfate sustained-release tablet was used alone. Compared with that of group A, the analgesic effect increased in group B (p=0.031). Moreover, satisfactory pain relief was associated with a significant increase in plasma ${\beta}$-endorphin levels. After the treatment, plasma ${\beta}$-endorphin level in group B was $62.4{\pm}13.5pg/ml$, which was higher than that in group A ($45.8{\pm}11.2pg/ml$) (p<0.05). Conclusions: Our results suggest the combination of intravenous flurbiprofen axetil and opioids can enhance the analgesic effect of opioid drugs by increasing plasma ${\beta}$-endorphin levels, which would offer a selected and reliable strategy for refractory cancer pain treatment.
San-Gang Wu,Jia-Yuan Sun,Zhen-Yu He,Qiong-Hua Chen,Juan Zhou 대한부인종양학회 2017 Journal of Gynecologic Oncology Vol.28 No.6
Objective: To investigate the clinicopathological features and outcomes between node-negative, early-stage cervical squamous cell carcinoma (SCC) and adenocarcinoma (AC) after hysterectomy. Methods: Patients diagnosed with International Federation of Gynecology and Obstetrics (FIGO) stages I–IIA cervical SCC and AC between 1988 and 2013 were retrospectively reviewed using the Surveillance, Epidemiology, and End Results database. We used propensity score-matching to balance patient baseline characteristics. Univariate and multivariate Cox regression analyses were used for prognostic analyses of cause-specific survival (CSS) and overall survival (OS). Results: A total of 9,858 patients were identified, comprising 6,117 patients (62.1%) and 3,741 (37.9%) patients with cervical SCC and AC, respectively. Compared with cervical SCC, cervical AC cases were more likely to be younger, diagnosed after 2000, white, and have well-differentiated and FIGO stage IB1 disease. For SCC and AC, the 10-year CSS rates were 93.4% and 94.7%, respectively (p=0.011), and the 10-year OS rates were 89.6% and 92.2%, respectively (p<0.001). Multivariate analysis revealed that age, ethnicity, tumor grade, and FIGO stage were independent prognostic factors of CSS and OS, but that histologic subtype was not associated with CSS and OS. In the propensity score-matched patient population, univariate and multivariate analyses also showed that histologic subtype was not associated with survival outcomes. Conclusion: Cervical AC has equivalent survival to cervical SCC in node-negative, early-stage disease after hysterectomy and lymphadenectomy.
Tian-wu Chen,Zhi-gang Yang,Zhi-hui Dong,Zhi-gang Chu,Si-shi Tang,Wen Deng 대한의학회 2011 Journal of Korean medical science Vol.26 No.3
The aim of this study was to investigate features of abdominal earthquake-related crush traumas in comparison with non-earthquake injury. A cross sectional survey was conducted with 51 survivors with abdominal crush injury in the 2008 Sichuan earthquake, and 41with abdominal non-earthquake injury, undergoing non-enhanced computed tomography (CT) scans, serving as earthquake trauma and control group, respectively. Data were analyzed between groups focusing on CT appearance. We found that injury of abdominalwall soft tissue and fractures of lumbar vertebrae were more common in earthquake trauma group than in control group (28 vs 13 victims, and 24 vs 9, respectively; all P <0.05); and fractures were predominantly in transverse process of 1-2 vertebrae among L1-3 vertebrae. Retroperitoneal injury in the kidney occurred more frequently in earthquake trauma group than in control group (29 vs 14 victims, P < 0.05). Abdominal injury in combination with thoracic and pelvic injury occurred more frequently in earthquake trauma group than in control group (43 vs 29 victims, P < 0.05). In conclusion, abdominal earthquake-related crush injury might be characteristic of high incidence in injury of abdominal-wall soft tissue, fractures of lumbar vertebrae in transverse process of 1-2 vertebrae among L1-3 vertebrae, retroperitoneal injury in the kidney, and in combination with injury in the thorax and pelvis.