A Study on Development of the Optimal Neural Network in GMA Welding Process

Wu, Qian Qian,Lee, Ji Hye,Lee, Jong Pyo,Park, Min Ho,Kim, Young Su,Kim, Ill Soo Trans Tech Publications, Ltd. 2014 Advanced materials research Vol.936 No.-

<P>Gas Metal Arc (GMA) welding is considered as a multi-parameter process that it’s hard to find optimal parameters for good welding. To overcome the problem, an artificial neural network based on the backpropagation algorithm was built to realize the relationships between process parameters and welding quality as output parameter. In this study, Mahalanobis Distance (MD) was employed to evaluate the availability of a given welding parameters which was proved to performance well in multivariate statistics. Input parameters such as welding current and arc voltage were chosen due to their significant influence on the welding quality. To improve the precision of given parameters’ evaluation, neural networks with different configurations were verified. The analyses on the measured and predicted MD by the proposed neural network were conducted. The proposed neural network based on the error backpropogation algorithm was proved to have high reliability to evaluate process parameters, which further makes it available in on-line monitoring system.</P>

A study on the modified Hough algorithm for image processing in weld seam tracking

Qian-Qian Wu,이종표,박민호,진병주,김도형,박철균,김일수 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.11

Nowadays, automatic Gas metal arc (GMA) welding is receiving a growing attention for its fast production speed and wide-rangingversatility. Furthermore, automatic and robotic welding systems are urgently needed for general application, which depends on the realizationof auto-weld seam tracking. Seam tracking system allows for not only robot or machine trajectory shifts, but also adaptive controlto change weld bead formation, making further improvement on the weld quality. Based on the laser vision system, this study aims fordevelopment of an image processing by the modified Hough algorithm which applied for seam tracking system in GMA welding. Toachieve this objective, image features in the procedure of welding processing were discussed and specially treated. Algorithms in theimage processing were investigated to maximize the processing effect based on the modified Hough algorithm, which was quite costefficientin line detection. Quantitative evaluations of the used algorithm were set up to acquire optimal image processing algorithm. Finally, a common image processing method was employed to verify efficiency of proposed image processing and extract the weldinglocation in a shorten time for industrial application. It can be concluded the detected feature points and centerlines proved that this algorithmcan be used for automatic GMA welding process as well as industrial applications.

The ERCC1 C118T Polymorphism Predicts Clinical Outcomes of Colorectal Cancer Patients Receiving Oxaliplatin-Based Chemotherapy: a Meta-analysis Based on 22 Studies

Qian, Ying-Ying,Liu, Xin-You,Wu, Qian,Song, Xian,Chen, Xiao-Feng,Liu, Yi-Qian,Pei, Dong,Shen, Li-Zong,Shu, Yong-Qian Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.19

Background: Although the predictive value of the excision repair cross-complementing group 1 (ERCC1) C118T polymorphism in clinical outcomes of patients with colorectal cancer (CRC) receiving oxaliplatin-based chemotherapy has been evaluated in numerous published studies, the conclusions are conflicting. Therefore, we performed the present meta-analysis to determine the precise role of the ERCC1 C118T polymorphism in this clinical situation and help optimize individual chemotherapy. Materials and Methods: A multiple search strategy was used to identify eligible studies. Pooled odds ratios (ORs) and their 95% confidence intervals (CIs) were used to estimate objective response and oxaliplatin-induced toxicity, with hazard ratios (HRs) with 95%CIs for progression-free survival (PFS) and overall survival (OS). Results: A total of 22 studies including 2,846 CRC patients were eligible in the analysis. Overall, no significant correlation was found between the ERCC1 C118T polymorphism and objective response to oxaliplatin-based chemotherapy, in all patients or in the Asian and Caucasian subgroups. However, the pooled analysis showed that the PFS and OS were significantly shorter in patients who carried T/T or T/C genotypes of ERCC1 C118T as compared to the C/C genotype. On stratified analysis by ethnicity, the ERCC1 118T allele was associated with a favorable prognosis in Caucasians (PFS, HR=0.58, 95%CI: 0.24-1.44; OS, HR=0.38, 95%CI: 0.22-0.64) but an unfavorable prognosis in Asians (PFS, HR=2.49, 95%CI: 1.87-3.33; OS, HR=2.63, 95%CI: 1.87-3.69) based on a dominant model. In addition, we failed to find a statistically significant impact of ERCC1 C118T polymorphism on oxaliplatin-induced toxicity. Conclusions: The ERCC1 C118T polymorphism may have prognostic value in patients with CRC undergoing oxaliplatin-based chemotherapy.

Preparation and Characterization of Acid and Pepsin-soluble Collagens from Scales of Croceine and Redlip Croakers

Qian-Qian Wu,Tao Li,Bin Wang,Guo-Fang Ding 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.6

Acid-soluble (ASC) and pepsin-soluble collagen (PSC) from scales of croceine croaker (ASCPC and PSC-PC) and redlip croaker (ASC-PP and PSC-PP) were prepared with yields of 0.37±0.08% (ASCPC), 1.09±0.23% (PSC-PC), 0.42±0.09% (ASC-PP), and 1.14±0.30% (PSC-PP) (dry scale basis). Gly (347.1- 359.8 residues/1,000 residues) was the major amino acid. Contents of imino acid were between 189.4 and 192.9 residues/1,000 residues in all 4 collagens. ASC-PC and ASC-PP were type I collagens. Differences in subunit components between ASC and PSC were observed. Denaturation temperature values of ASC-PC, ASC-PP, PSC-PC, and PSC-PP were 30.7, 30.1, 27.5, and 26.6℃, respectively. All 4 collagens were soluble at pH 1-4. Values declined when NaCl concentrations exceeded 2%. Freeze-dried collagens showed loose, fibrous, and porous structures. The 4 scale collagens can be alternatives to collagen from terrestrial animals for applications in functional food, cosmetic, and biomedical industries.

Soybean GmAOC3 promotes plant resistance to the common cutworm by increasing the expression of genes involved in resistance and volatile substance emission in transgenic tobaccos

Qian Wu,Hui Wang,Juanjuan Wu,Dagang Wang,Yongli Wang,Lei Zhang,Zhiping Huang,Deyue Yu 한국식물학회 2015 Journal of Plant Biology Vol.58 No.4

The evaluation and use of endogenous soybean genes is an effective strategy to minimize the yield losses caused by insects. Allene oxide cyclase (AOC) catalyzes the most important step in the biosynthesis of jasmonate (JA), which plays a crucial role in plant defense against insects. In this study, the role of GmAOC3 in plant insect resistance was evaluated. Real-time PCR results indicate that GmAOC3 was uniquely and rapidly activated and attained peak expression in leaves after attack by the common cutworm (CCW). In insect bioassays, transgenic lines overexpressing GmAOC3 were significantly less damaged than wild-type plants, and the relative growth rate of CCW fed with leaves from transgenic lines was significantly lower than that of CCW fed with leaves from wild-type plants. Electron microscopy revealed that the density of leaf trichomes in transgenic lines overexpressing GmAOC3 was greater than that in wild-type tobacco. Several physiological and morphological indicators, including JA, phenolic content and the relative expression levels of the putrescine N-methyltransferase (PMT) and proteinase inhibitor (PI) genes, phenylalanine ammonia lyase (PAL) activity and volatile substances, increased in the transgenic plants overexpressing GmAOC3. Our findings indicate that GmAOC3 plays an important role in soybean resistance to CCW and can be used as a resource for plant breeding.

중국 가족기업의 지배구조와 경영성과

QIAN WU,남영호 글로벌경영학회 2018 글로벌경영학회지 Vol.15 No.6

Due to the goal of family and corporate governance structure, family firms are different from the general enterprise. The aim of this article is to explore the relationship between the corporate governance and performance. In order to analyze this, the corporate governance of family firms is divided into two parts: corporate governance and family governance. Meanwhile, the size and year of the enterprises are considered as control variables which are used to inspect the influence to the performance of enterprise. The data of family in this article is obtained from the website of Shanghai/Shenzhen Stock Exchange and CSMAR financial database. After excluding the ST/PT enterprises and also the enterprises with incomplete data, the data of 708 listed family firms of A-share in China are used to proof the hypothesis of this thesis using the regression analysis of SPSS 18.0. The results show that both the corporate governance and family governance have a connection with the performance respectively. The board meetings which belong to the corporate governance structure, have a significant negative correlation with Tobin's Q. While the dominance of the family which belongs to the family governance has a significant positive correlation with Tobin's Q. Also the relationship between enterprise size and Tobin's Q is U-shaped while the impact of number of family members involved in the operation is ∩-shaped. Finally, for the listed family firms of China, the fewer meetings of the board, the more the family's control over the business, the better the business results. In order to achieve the family goal, the family may abandon the short-term financial performance to balance the long-term sustainable development between the family and enterprises. 가족기업은 가족과 기업을 근간으로 하는 기업이므로 일반기업과 다른 가족목표도 갖고 있으며, 가족기업의 지배구조 역시 일반기업과 다른 차이점을 갖고 있다. 본 연구의 목적은 중국 가족기업의 지배구조와 경영성과 간의 관계를 살펴보는 것이다. 이를 위해 본 연구에서는 가족기업의 지배구조를 기업의 지배구조와 가족의 지배구조로 나누고, 기업 규모와 기업 업력을 통제변수로 추가하여 이들과 가족기업의 경영성과에 대한 관계도 고찰하였다. 위의 연구목적을 달성하기 위해 본 연구는, 상해·심천증권거래소 사이트와 CSMAR(国泰安) 금융데이터베이스를 통해 중국의 가족기업 데이터(A주)를 수집하였다. 2016년도 기준 A주 상장된 가족기업 수는 1,022개사이며, 그 중에서 ST 기업, PT기업, 그리고 자료가 불충분한 기업을 제외하고, 최종적으로 708개 기업을 연구에 활용하였다. 또한 가설을 검증하기 위한 실증분석은 SPSS 18.0을 사용하여 회귀분석을 실시하였다. 연구결과, 기업의 지배구조와 가족의 지배구조가 경영성과에 관계가 있다는 것을 발견하였다. 기업의 지배구조인 이사회 회의 수는 경영성과인 Tobin's Q에 유의한 부(-)의 영향을 끼쳤다. 또한 가족의 지배구조인 경영지배권은 Tobin's Q에 유의한 정(+)의 영향을 끼쳤다. 기업 규모는 Tobin's Q와 ‘U’자형 관계가 있으며, 기업경영에 참여하는 가족구성원 수는 Tobin's Q와 ‘∩’자형 관계가 있음을 알아내었다. 결론적으로, 중국의 가족기업은 기업의 이사회 회의 수가 적을수록, 가족의 기업에 대한 경영지배권이 높을수록 경영성과를 증가할 수 있었다. 그러므로 중국의 가족기업은 선진국의 가족기업과 마찬가지로 가족과 기업 모두의 성장과 발전을 위하여 노력하여야 하며, 때에 따라서는 가족의 목표와 균형을 맞출 필요가 있을 경우, 기업의 단기적인 재무성과는 포기할 수도 있음을 알아야겠다.

Thermospheric Wind Observation and Simulation during the Nov 4, 2021 Geomagnetic Storm Event

Qian Wu,Dong Lin,Wenbin Wang,William Ward 한국우주과학회 2022 Journal of Astronomy and Space Sciences Vol.39 No.3

Thermospheric wind observations from high to mid latitudes are compared with the newly developed Multiscale Atmosphere Geospace Environment (MAGE) model for the Nov 3–4 geomagnetic storm. The observation and simulation comparison shows a very good agreement and is better at high latitudes in general. We were able to identify a thermospheric poleward wind reduction possibly linked to a northward turning of the Interplanetary Magnetic Field (IMF) at ~22 UT on Nov 3 and an enhancement of the poleward wind to a southward turning near 10 UT on Nov 4 at high latitudes. An IMF southward turning may have led to an enhancement of equatorward winds at Boulder, Colorado near midnight. Simultaneous occurrence of aurora may be associated with an IMF By turning negative. The MAGE model wind simulations are consistent with observations in these cases. The results show the model can be a very useful tool to further study the magnetosphere and ionosphere coupling on short time scales.

All Sky Camera and Fabry-Perot Interferometer Observations in the Northern Polar Cap

Wu Qian,Killeen Timothy L.,Solomon Stanley C.,McEwen Donald J.,Guo, Weiji Korea Institute of Ocean ScienceTechnology 2002 Ocean and Polar Research Vol.24 No.3

We report all sky camera and Fabry-Perot interferometer (FPI) observations of mesospheric gravity waves and a 12-hour wave at Resolute $(75^{\circ}N)$ and a joint observation of 10-hour wave with Eureka $(80^{\circ}N)$. All sky camera observations showed a low occurrence of mesosphere gravity waves during equinoxes, which is similar to the mid-latitude region. A slightly higher occurrence near solstice appears to indicate that gravity waves are not filtered out by the neutral wind in the winter. The FPI observation of a 12-hour wave showed amplitude variations from day to day. The phase of the wave is mostly stable and consistent with the GSWM prediction in the winter. The phase shifts with season as predicted by the GSWM. Four events of the 12-hour wave were found in spring with amplitudes larger than the GSW predictions. The FPls at Resolute and Eureka also observed a wave with period close to 10 hours. The 10-hour wave maybe the result of the non-linear interaction between the semi-diurnal tide and the quasi-two day wave. Further studies are under way. Overall, the combined Resolute and Eureka observation have revealed some new fractures about the mesospheric gravity wave, tidal wave, and other oscillations.

Stigma and Efficacy of Zhizhu Kuanzhong Capsules Versus Doxepin in the Treatment of Refractory Functional Dyspepsia: A Randomized Controlled Trial

Qian-Qian Wang,Li Cheng,Bi-Yu Wu,Hong-Yi Qiu,Ping Xu,Bo Wang,Xiu-Juan Yan,Sheng-Liang Chen 대한소화기 기능성질환∙운동학회 2023 Journal of Neurogastroenterology and Motility (JNM Vol.29 No.3

Background/AimsStigma related with antidepressants is prevalent in patients with functional dyspepsia. It affects medication compliance and efficacy. Herbal medicine acquired a deep-rooted cultural identity in relieving dyspeptic symptoms in Asians. The research was designed to compare the effectiveness of Zhizhu Kuanzhong capsules (ZZKZ) versus doxepin hydrochloride (doxepin) on alleviating stigma and medication nonadherence among patients with refractory FD (rFD). MethodsPatients with rFD from February 2021 to February 2022 were randomly allocated to receive either doxepin (n = 56) or ZZKZ (n = 57) combined with omeprazole for 4 weeks. Medication possession ratio (MPR), the disease- and medication-associated stigma were analyzed. The scales were utilized to assess dyspeptic symptoms (Leeds Dyspepsia Questionnaire) and psychological conditions (Generalized Anxiety Disorder Questionnaire and Patient Health Questionnaire). ResultsThe MPR values for ZZKZ were significantly higher than those for doxepin (P < 0.001). The stigma scores decreased in ZZKZ group while increased in doxepin group compared to baseline after treatment. The proportion of patients showing ZZKZ-associated stigma was significantly lower than doxepin-associated stigma (P < 0.001). The MPR values were negatively correlated with post-treatment stigma scores in both groups (P < 0.001). Dyspeptic symptoms and psychological condition were improved in both groups after treatment, with no significant difference on post-treatment Leeds Dyspepsia Questionnaire, Generalized Anxiety Disorder Questionnaire, or Patient Health Questionnaire scores between 2 groups. ConclusionZZKZ is superior to doxepin in alleviating stigma and medication non-adherence, with comparable efficacy in improving dyspeptic symptoms and psychological condition of patients with rFD.

The Evaluation Analysis of Computer Network Information Security based on FAHP

Qian Wu 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.9

Computer network information security has attracted much attention of the society. The importance of computer network information is widely accepted. According to the determined selection criterion of computer network information security evaluation indexes to choose 5 first-level evaluation indexes and 19 second-level evaluation indexes to construct the evaluation system of computer network information security, using the analytic hierarchy process (AHP) to determine the weight of each evaluation index, the evaluation results of computer network information security are divided into 5 levels, that is, very safe, safe, general, dangerous, very dangerous. Establishing the fuzzy comprehensive evaluation model, through the expert evaluation method to carry on the level evaluation, the computer network information security evaluation of Weifang University of Science and Technology is taken as an example to carry on the simulation calculation. The fuzzy comprehensive evaluation model of the computer network information security is professional, scientific, and reasonable, which could provide theoretical basis for the development of computer network.