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.

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.

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.

Natural History of Untreated Coronary Total Occlusions Revealed with Follow-Up Semi-Automated Quantitative Coronary CT Angiography: The Morphological Characteristics of Initial CT Predict Occlusion Shortening

Qian Wu,Mengmeng Yu,Yuehua Li,Wenbin Li,Zhigang Lu,Meng Wei,Jing Yan,Jiayin Zhang 대한영상의학회 2018 Korean Journal of Radiology Vol.19 No.2

Objective: To investigate the morphological changes of coronary chronic total occlusion (CTO) as determined by coronary computed tomography angiography (CCTA) follow-up using semi-automated quantitative analysis. Materials and Methods: Thirty patients with 31 CTO lesions confirmed by invasive coronary angiography and baseline/follow-up CCTA were retrospectively included. CTOs were quantitatively analyzed by a semi-automated coronary plaque analysis software (Coronary Plaque Analysis, version 2.0, Siemens) after manually determining the lesion border. Recanalized lumen was defined as the linear-like enhanced opacity traversing the non-opacified occluded segment. Other parameters, such as total occlusion length, total occlusion volume, volume with low attenuation component (< 30 Hounsfield unit [HU]), volume with middle to high attenuation component (30−190 HU) as well as the calcification volume, were also recorded. Results: Recanalized lumen was found within 48.4% (15/31) occlusions on the follow-up CCTA, compared to 45.2% (14/31) occlusions on the baseline CCTA. Eleven of 14 lesions (78.6%) with CT-visible recanalized lumen within CTOs had a shorter occlusion length on follow-up compared to only 3 of 17 lesions (17.6%) without CT-visible recanalized lumen (odds ratio, 17.1, p < 0.001). The percentage of low attenuation component of occlusions was smaller on follow-up CCTA compared to baseline value (18.1 ± 20.1% vs. 22.6 ± 19.6%, p = 0.033). Conclusion: Coronary computed tomography angiography enables non-invasive characterization of natural progression of untreated CTO lesions. Recanalized lumen within CTOs observed at baseline CCTA was associated with shortening of occlusion length on follow-up. Compared to their earlier stage, occlusions of later stage were presented with higher density of non-calcified components.

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.

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.

EFFECT OF CARBONIZATION TEMPERATURE ON DIELECTRIC AND MICROWAVE ABSORBING PROPERTIES OF COBALT DOPED MESOPOROUS CARBON COMPOSITES

QIAN LIAN,HONGJING WU,LIUDING WANG,HAO WU 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.3

Co doped mesoporous carbon composites (MC – Co) have been synthesized at di®erent carbon-ization temperatures via evaporation-induced multicomponent co-assembly strategy. Thenanostructures and chemical compositions of MC – Co composites were characterized by trans-mission electron microscope (TEM), scanning electron microscope (SEM) and X-ray di®ractionanalysis (XRD), etc. Their electromagnetic and microwave absorption properties were investi-gated in the frequency ranging from 2 GHz to 18 GHz. By the measurement of electromagneticparameters and theoretical simulation of re°ection loss (RL), the results showed that the mini-mum RL value of the optimum composite MC – Co-800 reached up to ? 41.9 dB at 13.5 GHz with athickness of only 1.80 mm, and the e®ective absorption bandwidth ( < ? 10 dB) is 4.4 GHz (from11.4 GHz to 15.8 GHz). This work demonstrated that the optimum carbonization temperature ofthe obtained composites is 800?C, which is critical to its electromagnetic properties. The excellentmicrowave absorption properties can be attributed to dielectric loss, Ohmic loss, and charac-teristic impedance matching. Therefore, the as-synthesized composites could be acted as a can-didate of microwave absorber, especially for the light weight demand.

Incidence and Mortality of Female Breast Cancer in Jiangsu, China

Wu, Li-Zhu,Han, Ren-Qiang,Zhou, Jin-Yi,Yang, Jie,Dong, Mei-Hua,Qian, Yun,Wu, Ming Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.6

Objectives: The aim of this study was to describe and analyze the incidence and mortality of female breast cancer in Jiangsu Province of China. Methods: Incidence and mortality data for female breast cancer and corresponding population statistics from eligible cancer registries in Jiangsu from 2006 to 2010 were collected and analyzed. Crude rates, age-specific rates and age-standardized rates of incidence and mortality were calculated, and annual present changes (APCs) were estimated to describe the time trends. Results: From 2006 to 2010, 11,013 new cases and 3,068 deaths of female breast cancer were identified in selected cancer registry areas of Jiangsu. The annual average crude incidence and age-standardized incidence by world population (ASW) were 25.2/ and 17.9/100,000 respectively. The annual average crude and ASW for mortality rates were 7.03/ and 4.81/100,000. The incidence was higher in urban areas than that in rural areas, and this was consistent in all age groups. No significant difference was observed in mortality between urban and rural areas. Two peaks were observed when looking at age-specific rates, one at 50-59 years and another at over 85 years. During the 5 years, incidence and mortality increased with APCs of 4.47% and 6.89%, respectively. Compared to the national level, Jiangsu is an area with relatively low risk of female breast cancer. Conclusion: Breast cancer has become a main public health problem among Chinese females. More prevention and control activities should be conducted to reduce the burden of this disease, even in relatively low risk areas like Jiangsu.

Alkylation of phenol with tert-butyl alcohol over zirconium incorporated mesoporous molecular sieves with enhanced acidity

Qian Zhao,Qian Wang,Duolin Wu,Xiaoqi Fu,Tingshun Jiang,Hengbo Yin 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.4

Several SO42-/Zr-MCM-41 and SO42-/Zr-MCM-48 solid acid catalysts were prepared by wet impregnation method and were characterized by FT-IR, XRD, NH3-TPD and N2 physical adsorption,respectively. The catalytic activities of these catalysts were evaluated in alkylation reaction of phenol and tert-butyl alcohol. Experimental results reveal that the four solid acid catalysts still maintained a typical mesoporous framework. Under comparable condition, the SO42-/Zr-MCM-48-25 catalyst exhibits much high catalytic activity and gives the highest phenol conversion as compared with the other catalysts. A maximum phenol conversion of 91.6% with 81.8% selectivity to 4-tert-butylphenol (4-TBP) was achieved at the reaction temperature of 140 8C. 2012 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.