Using Balance Score Card to Evaluate Performance of High-Tech Companies

Lu Kebin,Wang qiang,Zhu Benxiao 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.4

Removal of High Density Impulse Noise of Aerial Insulator Image

Cui Kebin,Li Baoshu,Yuan Jinsha,Wang Ping 보안공학연구지원센터(IJSIP) 2014 International Journal of Signal Processing, Image Vol.7 No.6

Aiming at the impulse noise generated in capturing the images of insulator on power lines, a denoising method based on peer groups is proposed. The center pixel variance σcenter is defined, the minimum of neighborhood variance and center σmin is treated as threshold σmin and the peer group is determined by comparing the relation between absolute value of gray value difference and σmin . According to the size of peer group and its complement set, center pixel is estimated when noisy pixels exist in the neighborhood window. Otherwise, the size of window is adjusted adaptively and center pixel is estimated on the basis of mean value of non-noisy pixels within adjusted window. The experimental results show that the method can get a higher peak signal to noise ratio, IEF and SSIM when there is high density impulse noise in an image.

Experimental study on ultimate torsional strength of PC composite box-girder with corrugated steel webs under pure torsion

Yong Ding,Kebin Jiang,Fei Shao,Anzhong Deng 국제구조공학회 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.46 No.4

To have a better understanding of the torsional mechanism and influencing factors of PC composite box-girder with corrugated steel webs, ultimate torsional strength of four specimens under pure torsion were analyzed with Model Test Method. Monotonic pure torsion acts on specimens by eccentric concentrated loading. The experimental results show that cracks form at an angle of 45° to the member’s longitudinal axis in the top and bottom concrete slabs. Longitudinal reinforcement located in the center of cross section contributes little to torsional capacity of the specimens. Torsional rigidity is proportional to shape parameter η of corrugation and there is an increase in yielding torque and ultimate torque of specimens as the thickness of corrugated steel webs increases.

Experimental and theoretical research on the compression performance of CFRP sheet confined GFRP short pole

Li Chen,Qilin Zhao,Kebin Jiang 국제구조공학회 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.40 No.2

The axial compressive strength of unidirectional FRP is generally quite lower than its axial tensile strength. This fact decreases the advantages of FRP as main load bearing member in engineering structure. In order to restrain the lateral expansion and splitting of GFRP, and accordingly heighten its axial compressive bearing capacity, a project that to confine GFRP pole with surrounding CFRP sheet is suggested in the present study. The Experiment on the CFRP sheet confined GFRP poles showed that a combined structure of high bearing capacity was attained. Basing on the experiment research a theoretical iterative calculation approach is suggested to predict the ultimate axial compressive stress of the combined structure, and the predicted results agree well with the experimental results. Then the influences of geometrical parameters on the ultimate axial compressive stress of the combined structure are also analyzed basing on this approach.

Persulfate Wet Oxidation Method for the Determination of Total Phosphorus in Atmospheric Aerosols and Its Application for a Year-round Observation in Beijing

Tomoaki Okuda,Yuma Gunji,Kebin He,Yongliang Ma 한국대기환경학회 2013 Asian Journal of Atmospheric Environment (AJAE) Vol.7 No.3

Measurement of the phosphorus concentration in aerosols in Beijing, which was a representative East Asian mega-city, was carried out. The optimum procedure for analyzing phosphorus in aerosols was found in this study. Recovery of phosphorus in environmental samples through the improved method was almost 100%. The concentration of phosphorus in TSP was 145±47 ng/m3, with a seasonal variation showing high concentrations in winter and low concentrations in summer. The concentrations of phosphorus in PM2.5 accounted for 35±6% of those in TSP, with no seasonal variations. The major source of phosphorus in aerosols in Beijing was soil dust,and additional sources of phosphorus in fine particles could be coal combustion and biomass burning.

Experimental study on ultimate torsional strength of PC composite box-girder with corrugated steel webs under pure torsion

Ding, Yong,Jiang, Kebin,Shao, Fei,Deng, Anzhong Techno-Press 2013 Structural Engineering and Mechanics, An Int'l Jou Vol.46 No.4

To have a better understanding of the torsional mechanism and influencing factors of PC composite box-girder with corrugated steel webs, ultimate torsional strength of four specimens under pure torsion were analyzed with Model Test Method. Monotonic pure torsion acts on specimens by eccentric concentrated loading. The experimental results show that cracks form at an angle of $45^{\circ}$ to the member's longitudinal axis in the top and bottom concrete slabs. Longitudinal reinforcement located in the center of cross section contributes little to torsional capacity of the specimens. Torsional rigidity is proportional to shape parameter ${\eta}$ of corrugation and there is an increase in yielding torque and ultimate torque of specimens as the thickness of corrugated steel webs increases.

Experimental and theoretical research on the compression performance of CFRP sheet confined GFRP short pole

Chen, Li,Zhao, Qilin,Jiang, Kebin Techno-Press 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.40 No.2

The axial compressive strength of unidirectional FRP is generally quite lower than its axial tensile strength. This fact decreases the advantages of FRP as main load bearing member in engineering structure. In order to restrain the lateral expansion and splitting of GFRP, and accordingly heighten its axial compressive bearing capacity, a project that to confine GFRP pole with surrounding CFRP sheet is suggested in the present study. The Experiment on the CFRP sheet confined GFRP poles showed that a combined structure of high bearing capacity was attained. Basing on the experiment research a theoretical iterative calculation approach is suggested to predict the ultimate axial compressive stress of the combined structure, and the predicted results agree well with the experimental results. Then the influences of geometrical parameters on the ultimate axial compressive stress of the combined structure are also analyzed basing on this approach.

Systemic Family Therapy of Comorbidity of Anxiety and Depression with Epilepsy in Adolescents

Jing Li1,Xuefeng Wang,Huaqing Meng,Kebin Zeng,Fengying Quan,Fang Liu 대한신경정신의학회 2016 PSYCHIATRY INVESTIGATION Vol.13 No.3

ObjectiveaaThe aim of this study was to find if systemic family therapy (SFT) does work in anxiety and depression with epilepsy in adolescents (ADAE). Methodsaa104 adolescents with epilepsy, aged 13–20 years old, were included from December 2009 to December 2010, the enrolled patients were with anxiety [Hamilton Anxiety Scale (HAMA) score ≥14 points] or depression [Hamilton Depression Scale (HAMD) score ≥20 points]. The patients were randomly divided into the control group (n=52) treated with antiepileptic drugs (AED) and the intervention group (n=52) undergone Systemic Family Therapy (SFT) as well as AED. The AED improvements, anxiety and depression scores, Social Support Rating Scale (SSRS), Family Assessment Device (FAD) and scale of systemic family dynamics (SSFD) were observed after 3-month treatment. ResultsaaThe frequencies of epileptic seizures in intervention group was decreased much more significantly than the control group (4.22±3.54 times/month vs. 6.20±5.86 times/month, p=0.04); and the scores of anxiety (9.52±6.28 points vs. 13.48±8.47 points, p=0.01) and depression (13.86±9.17 points vs. 18.89±8.73 points, p=0.02) were significantly decreased than the control group; meanwhile, the family dynamics and family functions were significantly improved, and the social support was also increased (p<0.05). ConclusionaaSFT combined with AEDs had better efficacies than AEDs alone, not only the frequency of epileptic seizures was decreased, but also the patients’ anxiety and depression were improved, and the family dynamics, family functions and social support were improved.

Time-of-flight detection of femtosecond laser pulses for precise measurement of large microelectronic step height

Lu, Xing,Zhang, Shuangyou,Jeon, Chan-Gi,Kang, Chu-Shik,Kim, Jungwon,Shi, Kebin The Optical Society 2018 Optics letters Vol.43 No.7

<P>We propose and demonstrate a new method which employs time-of-flight detection of femtosecond laser pulses for precise height measurement of large steps. By using time-of-flight detection with fiber-loop optical-microwave phase detectors, precise measurement of large step height is realized. The proposed method shows uncertainties of 15 nm and 6.5 nm at sampling periods of 40 ms and 800 ms, respectively. This method employs only one free-running femtosecond mode-locked laser and requires no scanning of laser repetition rate, making it easier to operate. Precise measurements of 6 mu m and 0.5 mm step heights have been demonstrated, which show good functionality of this method for measurement of step heights. (c) 2018 Optical Society of America</P>

사막화방지(沙漠化防止) 및 방사기술개발(防沙技術開發)에 관한 연구(硏究)(III) - 중국(中國)의 황막사지(荒漠沙地) 녹화기술분석(綠化技術分析) -

Woo, Bo-Myeong,Lee, Kyung-Joon,Choi, Hyung-Tae,Lee, Sang-Ho,Park, Joo-Won,Wang, Lixian,Zhang, Kebin,Sun, Baoping 한국산림과학회 2001 한국산림과학회지 Vol.90 No.1

이 연구는 지난 3년간 북경임업대학교와 공동연구과제로 중국의 사막화방지 및 방사기술개발을 위한 연구의 일환으로 사막화현황 및 녹화기술수준조사 및 평가를 위하여 수행되었으며, 특히 본고에서는 중국의 황막사지에 대한 녹화기술을 분석하고자 하였다. 사막화지역 식생분포의 일반적인 특징은 부분적으로 집중된 식생분포, 즉 사막의 저지대 또는 분지의 낮은 곳의 사구에 있는 사막식물, 염수호 주변의 내염성식물, 담수 염수호와 하천연안의 포플러 및 위성류의 군생, 사력퇴적지(고비)의 사퇴식생, 하천선상지의 초생지 및 오아시스(녹주(綠洲))숲 등이다. 일반적으로 사막화지역에는 중국식물명(中國植物名)으로 정류(檉柳)(홍류(紅柳))(Tamarix chinensis Lour.), 사사(梭梭)(Haloxylon ammodendron Bunge.), 사괴조(沙拐棗)(Calligonum Spp.), 호루(胡楊)(Populus euphratica Oliver.), 사조(沙棗)(Elaeagnus angustifolia L.), 유(楡)백유(白楡)(Ulmus pumila L.), 류류(柳類)(Salix spp.), 암황시(岩黃蓍)(Hedysarum spp.), 금계아(錦鷄兒)(Caragana spp.), 문관과(文冠果)(Xanthoceras sorbifolia Bunge.), 백자(白刺)(Nitraria tangutorum Bobr.), 호기자(胡技子)(Lespedeza bicolor), 낙타자(駱駝刺)(Alhagi sparsifolia Shap.), 자산감(刺山柑)(Capparis spinosa L.), 사호(沙蒿)(Artemisia arenaria DC.) 등이 널리 분포하며, 이와 같은 사막화지역 자생식물에 관한 연구가 더욱 필요한 상황에 있다. 풍식지역에서는 합리적인 경작체계(지역계획, 방풍림체계 및 오아시스보호체계, 관개수로네트워크설치, 광대한 농지관리기술 등), 식물자원의 합리적 이용기술(연료림, 약용식물, 방목, 초지관리 등), 수자원이용(유역계획 및 관리, 수로건설, 절수관개기법 등), 방풍림조성, 인구증가의 조절, 농용림 연료목 사료증산기술 등에 관해서, 그리고 수식지역에서는 합리적인 토지이용기술, 식생이용기술, 공학적기술, 농작물보호기술 개발 등에 관한 시험연구사업이 중점적으로 추진되고 있다. 또한, 사막화지역에서의 염성토양 알카리토양개량을 위한 수리적(관개, 배수, 세탈, 수도재배 등), 농업적(토지정리, 경작, 시비, 파종, 윤작, 혼작, 객토 등), 생물적(내염성 작물 및 녹비의 재배, 조림 등) 방법 등에 관한 시험연구도 활발하게 추진되고 있으며, 이와 같은 사막화지역의 녹화사업에 국제적인 협력을 절실하게 요망하고 있다. This study is aimed to analyze and to evaluate the revegetation and soil conservation technology in desertification-affected sandy land, resulting from the project of "Studies on the desertification combating and sand industry development". Main native plants for combating desertification : The general characteristics of vegetation distribution in desertified regions are partially concentrated vegetation distribution types including the a) desert plants in low zone of desert or sanddune of depressed basin, b) salt-resistant plants around saline lakes, c) grouped vegetation with Poplar and Chinese Tamarix of freshwater-lakes, saline-lakes and river-banks, d) gobi vegetation of gravel desert and e) grassland and oasis-woods around the alluvial fan of rivers, etc. Generally, Tamarix ehinensis Lour., Haloxylon ammodendron Bunge., Calligonum spp., Populus euphratica Oliver., Elaeagnus angustifolia L., Ulmus pumila L., Salix spp., Hedysarum spp., Caragana spp., Xanthoceras sorbifolia Bunge., Nitraria tangutorum Bobr., Lespedeza bicolor, Alhagi sparsifolia Shap., Capparis spinosa L., Artemisia arenaria DC., etc. are widely distributed in desertified regions. It is necessary for conducting research in the native plants in desertified regions. Analysis of intensive revegetation technology system for combating desertification : In the wind erosion region, the experimental research projects of rational farming systems (regional planning, shelterbelts system, protection system of oasis, establishment of irrigation-channel networks and management technology of enormous farmlands, etc.), rational utilization technology of plant resources (fuelwood, medicinal plants, grazing and grassland management, etc.), utilization technology of water resources (management and planning of watershed, construction of channel and technology of water saving and irrigation, etc.), establishment of sheltetbelts, control of population increase and increased production technology of agricultural forest, fuelwood and feed, etc. are preponderantly being promoted. And in water erosion region, the experimental research projects of development of rational utilization technology of land and vegetation, engineering technology and protection technology of crops, etc. are being promoted in priority. And also, the experimental researches on the methods of utilization of water (irrigation, drainage, washing and rice cultivation, etc.), agricultural methods (reclamation of land, agronomy, fertilization, seeding, crop rotation, mixed-cultivation and soil dressing works, etc.) and biological methods (cultivation of salt-resistant crops and green manure and tree plantation, etc.) for improvement of saline soil and alkaline soil in desertified-lands are actively being promoted. And the international cooperations on the revegetation technology development projects of desertified-lands are sincerely being required.