초점 제어에 의한 3D 프린터(DLP)의 정도향상에 관한 연구

MA XIANG,권현규(H. K. Kweon),신근식(G. S. Shin),박창용(C. Y. Park),강용구(Y. G. Kang) 한국기계가공학회 2017 한국기계가공학회 춘추계학술대회 논문집 Vol.2017 No.4

Research on Resource Scheduling Technology Based on LB Algorithm and Belief Model for Cloud Computing

Xiang Ma,Qiao Li 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.5

Aiming at the problem of resource scheduling in cloud computing, we constructed a new scheduling method based on trust model and LB algorithm. Firstly, on the basis of matching tasks and resources, we established three calculation modes on security requirements and reliable demand benefits. Secondly, based on the benefit function of security requirements and reliable demand, we built the trust benefit function of total. Finally, we got a cloud resource scheduling algorithm which combined with load balancing algorithm. The experimental results show that proposed method has obvious advantages comparing with the maximum and minimum trust driving method in the execution time span, load balancing performance and average waiting time, and this method can carry out fast and efficient resources scheduling for cloud computing.

Synthesis of multicolor fluorescent CDs from natural plant kaempferide and their application in anti-counterfeiting inks

Ma Linping,Long Xiang,Ma Yanshun,Wu Shaogui 한국탄소학회 2024 Carbon Letters Vol.34 No.3

Carbon dots (CDs) are versatile nanomaterials with tunable luminescent properties. We used a natural plant kaempferol as a carbon source to synthesize multicolor CDs by reacting it with various nitrogen sources. Blue, green, and red CDs (B-CDs, G-CDs, and R-CDs) with emission wavelengths of 445 nm, 510 nm, and 600 nm respectively were successfully synthesized. Their photoluminescence quantum yields of are up to 37.4%, 20.1%, and 30.8%, respectively. Surface analysis revealed abundant nitrogen groups influencing luminescence. B-CDs and G-CDs show excitation-dependent emissions, indicating a potential correlation between their luminescence and particle sizes, while R-CDs exhibit excitation-independent emission, suggesting they belong to molecular state CDs. All three CDs exhibit stable luminescent performance, as well as good salt resistance and photobleaching resistance. The practical application of multicolored CDs in anti-counterfeiting fluorescent inks was further explored. This work offers a straightforward, eco-friendly route to synthesize multicolor CDs.

MULTIPLE SYMMETRIC POSITIVE SOLUTIONS OF FOURTH-ORDER TWO POINT BOUNDARY VALUE PROBLEM

Ma, De-Xiang,Ge, Wei-Gao 한국전산응용수학회 2006 Journal of applied mathematics & informatics Vol.22 No.1

In this paper, by using the Krasnoselskii fixed point theorem, we study the existence of 2m or 2m + 1 symmetric positive solutions of fourth-order two point boundary value problem y(4)(t) - f(t, y(t), y"(t))= 0, y(0) = y(1) = y'(0) = y"(1)=0.

Phase II Study of Preoperative Intra-Arterial Epirubicin, Etoposide, and Oxaliplatin Combined with Oral S-1 Chemotherapy for the Treatment of Borrmann Type 4 Gastric Cancer

Xiang, Xiao-song,Su, Yu,Li, Guo-li,Ma, Long,Zhou, Chang-sheng,Ma, Ru-feng The Korean Gastric Cancer Association 2020 Journal of gastric cancer Vol.20 No.4

Purpose: A phase II study was conducted to evaluate the safety and efficacy of preoperative, intra-arterial perfusion of epirubicin, etoposide, and oxaliplatin combined with oral chemotherapy S-1 (SEEOX) for the treatment of type 4 gastric cancer. Materials and Methods: A single-center, single-arm phase II trial was conducted on 36 patients with histologically proven type 4 gastric cancer without distant peritoneal or organ metastasis. Patients received 3, 21-day courses of SEEOX preoperative chemotherapy. The primary endpoint was overall survival (OS) and the secondary outcomes assessed were chemotherapeutic response, radical resection rate, pathological regression, toxicities, postoperative morbidity, and mortality. Results: All patients were at an advanced stage of cancer (stage III or IV) and completed the entire course of treatment. Based on changes in tumor volume and peritoneal metastasis, the objective response rate was 55.6% (20/36; 95% confidence interval [CI], 38.5%-72.6%) and the disease control rate was 69.4% (25/36; 95% CI, 53.6%-85.3%). The radical resection rate was 75% (27/36; 95% CI, 60.1%-89.9%) and the proportion of R0 resections was 66.7% (21/36; 95% CI, 50.5%-82.8%). The pathological response rate was 33.3%, of which 13.9% showed complete pathological regression. The median survival was 27.1 months (95% CI, 22.24-31.97 months), and the 2-year OS was 48.5% (95% CI, 30.86%-66.1%). Conclusions: Preoperative SEEOX is a safe and effective treatment for type 4 gastric cancer. Based on these preliminary data, a phase III study will be conducted to confirm the superiority of this regimen over standard treatment.

Design of Intelligent Information Monitoring System for Distribution Network and Adjustment of Alarm Threshold

Xiang Ma,Jianye Cui,Zhongming Xiang,Haoliang Du,Jianfeng Huang 한국정보과학회 2022 Journal of Computing Science and Engineering Vol.16 No.2

In the current distribution network information monitoring system, there are many false alarm information, which forms redundant interference to the fault alarm threshold, and it is difficult to ensure the alarm accuracy of the monitoring system. The distribution network intelligent information monitoring system and the alarm threshold adjustment method based on machine learning are designed, with the physical layer of the system designed to collect the operation status information of each line and equipment of the distribution network according to various sensors, and transfer it to the data layer. The data layer extracts, processes, and classifies the received information, stores it in the database, obtains the abnormal information in the information base, and adjusts the alarm threshold based on the fuzzy clustering method in machine learning, realizing intelligent monitoring of distribution network. The test results show that the detection performance of abnormal information is good, that the abnormal information in the data can be obtained accurately, and that the clustering of the target category of abnormal information can be completed according to the eigenvalue, and has a good threshold adaptive adjustment ability, to maximize the balance between human, machine, and power grid operation state in the process of distribution network monitoring information, ensure real-time and reliable monitoring and alarm results.

A New Approach for Modeling and Computation of Dynamics of Robots Containing Closed Chains

Xu,Xiang-Rong,Ma,Xiang-Feng,Choi,Young-Hyu,Chung,Won-Jee 창원대학교 공작기계기술연구센터 1999 연구업적집 Vol.1 No.1

This paper presents a new recursive algorithm of robot dynamics based on the Kane's dynamic equations and Newton-Euler formulations. Differing from Kane's work, the algorithm is general-propose and can be easily realized on computers. It is suited not only for robots with all rotary joints but also for robots with some prismatic joints Formulations of the algorithm keep the recurrence characteristics of the Newton-Euler formulations, but possess stronger physical significance. Unlike the conventional algorithms, such as the Lagrange and Newton-Euler algorithm, etc, the algorithm can be used to deal with dynamics of robots containing closed chains without cutting the closed chains open. In addition, this paper makes a comparison between the algorithm and those conventional algorithms from the number of multiplications and additions.

다형태 로고가 도시 브랜드 디자인에 미치는 영향

마상우 ( Ma Xiang Yu ),홍찬석 ( Hong Chan Seok ) 한국기초조형학회 2021 한국기초조형학회 학술발표논문집 Vol.2021 No.1

실내조명기구 디자인의 혁신성과 제품구매 의도의 상관성 연구 : 전통 중국식 조명기구 중심으로

마가상(Ma, Ke Xiang),이성원(Lee, Sung Won) 한국디자인리서치학회 2020 한국디자인리서치 Vol.5 No.2

최근 몇십 년간에 경제발전에 따라 현대인은 점점 생활의 질적 수준이 높아지며 자신만의 뚜렷한 라이프 스타일과 인테리어 취향을 가지고 있다. 조명기구 디자인은 활성화를 시키기 위한 많은 각도에서 연구 개발하여야 한다. 소비자를 대상으로 하는 현대 조명기구 디자인 혁신성의 핵심은 새로운 방향을 제시하는 디자인의 역할을 강화하고 경쟁력을 향상하기 위한 노력을 다각적으로 기울이며, 차별화된 제품 디자인을 적극적으로 개발하는 것이다. 이에 본 연구에서는 소비자들이 제품구매 의도를 고려할 수 있는 시각적 요인과 기능적 요인을 도출하고, 소비자의 구매 의도에 미치는 영향을 검증하자고 하였다. 분석결과를 보면 첫째, 현대 조명기구 디자인 혁신성에서 소비자의 사용 만족도에 영향을 미치는 것은 시각적 요인으로 나타났으며 기능적 요인은 사용 만족도에 영향을 미치지 않은 것으로 나타났다. 둘째, 소비자의 사용 만족도는 구매 의도에 긍정적 영향을 주고 있는 것으로 확인할 수 있다. 분석결과에 따라 연구자가 조사 결과를 맞게 재설계하였다. 향후 실내 조명기구의 혁신적 제품으로 개발에 도움을 줄 수 있는 기초자료가 되기를 기대한다. In recent decades, with the development of the economy, modern people have gradually increased the quality of life and have their own distinct lifestyle and interior taste. Lighting equipment design must be researched and developed from many angles to activate. The essence of modern lighting fixture design innovation for consumers is strengthening the role of design that suggests a new direction and diversifying efforts to enhance competitiveness, and actively developing differentiated product designs. Therefore, in this study, it is intended to draw out visual and functional factors that allow consumers to consider product purchase intentions, and to verify the effects on consumers purchase intentions. As a result of the analysis, first, it was found that it was a visual factor influencing the consumer s use satisfaction in the design innovation of modern lighting fixtures, and the functional factor did not affect the use satisfaction. Second, it can be confirmed that consumer satisfaction with use has a positive effect on purchase intention. According to the analysis result, the researcher has redesigned to match the survey results. It is expected that it will be a basic material that can help development with innovative products of indoor lighting fixtures in the future.

김봉룡과 강천리 작품을 중심으로 본 한 중 나전칠기 비교 및 4차산업 기술 융합을 통한 발전방안 연구

마가상(Ma, Ke Xiang),이성원(Lee, Sung Won) 한국전시산업융합연구원 2020 한국과학예술융합학회 Vol.38 No.3

나전칠기는 한 · 중 · 일을 대표하는 전통 공예기법이다. 독특하고 아름다운 예술 양식인 나전칠기는 미적가치와 전통공예로서의 실용성을 두루 갖추고 있다. 본 연구의 목적은 한국과 중국 양국을 대표하는 장인인 ‘강천리(江千里)’와 ‘김봉룡(金奉龍)’을 비교 분석함으로써 두 나라가 공유하는 나전칠기 예술의 보편적 특성을 논의함과 동시에 각국의 나전칠기 양식이 가진 특수성을 비교하여 나전칠기 공예의 대중화와 현대화 방안을 모색하는 데 있다. 따라서 본 논문은 작품 분석과 문헌연구방법을 통하여 두 나라의 나전칠기에 대한 예술사적 흐름을 고찰하고 두 사람의 작품중 대표성을 띠는 작품 범위에 한정하여 비교 · 대조, 분석을 이행하였다. 연구결과 및 내용은 다음과 같다. 첫째, 두 사람의 시대적 배경과 작품 특징 및 예술 양식은 작품 모티브, 작품 주제, 기법 등에서 뚜렷한 차이를 보임이 나타났다. 둘째, 4차산업 기술에 해당하는 AI와 3D프린팅 기능은 전통이나 고전으로만 남아있는 나전칠기 공예를 새롭게 해석할 수 있는 실마리가 될 수 있다는 점도 확인하였다. 이러한 연구결과를 바탕으로 동아시아가 공유하는 전통 예술인 나전칠기의 우수성을 다시 한번 되새기고, 나전칠기 예술의 계승과 발전에 이바지하기를 기대한다. Najeonchigi is a traditional craft technique that represents Korea, China, and Japan. A unique and beautiful style of art, Najeon Chilgi has a wide range of aesthetic values and practicality as a traditional craft. The purpose of this study is to discuss the universal characteristics of Najeon Chilgi art shared by the two countries by comparing and analyzing "Gang cheon-ri" and "Kim Bong-ryong," the craftsmen representing both Korea and China, while at the same time comparing the specialities of Najeon Chilgi styles of each country to find ways to popularize and modernize Najeon Chilgi crafts. Therefore, through the analysis of works and the method of literature research, this paper considered the flow of art history about the najeonchigi of the two countries and carried out the comparison, contrast and analysis limited to the range of works that bear representativeness among the two works. The results and contents of the study are as follows. First, the period background and work characteristics and art styles of the two showed distinct differences in work motifs, work themes and techniques. Second, it was also confirmed that the AI and 3D printing functions, which correspond to the fourth industrial technology, could serve as a clue to a new interpretation of the lacquerware, which remains traditional or classical. Based on these findings, we hope to reflect on the excellence of Najeon Chilgi, a traditional art shared by East Asia, and to contribute to the succession and development of Najeon Chilgi art.