Optimization of Capacity Configuration of Wind–Solar–Diesel–Storage Using Improved Sparrow Search Algorithm

Dong Jun,Dou Zhenhai,Si Shuqian,Wang Zichen,Liu Lianxin 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.1

In order to reasonably allocate the capacity of distributed generation and realize the goal of stable, economic and clean operation of the system, a multi-objective optimization model with investment cost, environmental protection and power supply quality as indicators has been established, and the multi-objective sparrow search algorithm is used to optimize the solution. Although the multi-objective search algorithm is more effi cient than the traditional single objective algorithm, it is easy to fall into local optimum. To this end, the niche optimization technology is used to improve the optimization eff ect of multi-objective sparrow search algorithm, and the Levy fl ight strategy is introduced to enhance the ability of multi-objective sparrow search algorithm to jump out of local optimum. The calculation example uses the traditional multi-object search algorithm and the niche multi-objective sparrow search algorithm with levy disturbance to solve the proposed model. The simulation results verify the eff ectiveness of the multi-objective sparrow search algorithm improved by levy disturbance and niche optimization technology

TMPRSS2:ETS Fusions and Clinicopathologic Characteristics of Prostate Cancer Patients from Eastern China

Dong, Jun,Xiao, Li,Sheng, Lu,Xu, Jun,Sun, Zhong-Quan Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.7

TMPRSS2:ERG gene fusions in prostate cancer have a dominant prevalence of approximately 50.0%, but infomration is limited on differences among ethnic and geographical groups. Some studies focusing on Japanese and Korean patients reported a lower incidence. Investigations concerning Chinese revealed controversial results. We evaluated TMPRSS2:ERG, TMPRSS2:ETV1 and TMPRSS2:ETV4 fusions in more than 100 Eastern Chinese prostate cancer patients. Paraffin blocks of needle biopsy and radical prostatectomy were collected from 91 and 18 patients respectively. All patients' clinicopathologic factors were gathered. TMPRSS2:ERG, TMPRSS2:ETV1 and TMPRSS2:ETV4 fusions were tested by multi-probe fluorescence in situ hybridization (FISH) assay. TMPRSS2:ERG fusions was present in 14.3% biopsy specimens and 11.1% radical prostatectomy patients. Neither TMPRSS2:ETV1 nor TMPRSS2:ETV4 fusion was found in any case. Altogether, 13 (86.7%) TMPRSS2:ERG fusion positive cases possessed deletion pattern and 7 (46.6%) and insertion pattern. Some 5 cases had both deletion and insertion patterns. While 38.5% (5/13) patients with deletion pattern had distant metastasis, except for one metastatic case harboring both deletion and insertion, there were no patients with insertion pattern accompanied with metastasis. There were no differences between fusion positive and negative cases in the distribution of age, PSA, Gleason score and TNM stage. Eastern Chinese prostate cancer patients have a significantly low incidence of TMPRSS2:ERG fusion. They also lack TMPRSS2:ETV1 and TMPRSS2:ETV4 fusion. There are more deletion pattern than insertion pattern in TMPRSS2:ERG positive cases. Fusion positive and negative patients have no clinicopathologic factor differences.

Simulations of the hysteretic behavior of thin-wall cold-formed steel members under cyclic uniaxial loading

Dong, Jun,Wang, Shiqi,Lu, Xi Techno-Press 2006 Structural Engineering and Mechanics, An Int'l Jou Vol.24 No.3

In this paper, the hysteretic behaviors of channel and C-section cold-formed steel members (CFSMs) under cyclic axial loading were simulated with the finite element method. Geometric and material nonlinearities, Bauschinger effect, strain hardening and strength improvement at corner zones were taken into account. Extensive numerical results indicated that, as the width-to-thickness ratio increases, local buckling occurs prematurely. As a result, the hysteretic behavior of the CFSMs degrades and their energy dissipation capability decreases. Due to the presence of lips, the hysteretic behavior of a C-section steel member is superior to that of its corresponding channel section. The intermediate stiffeners in a C-section steel member postpone the occurrence of local buckling and change its shapes, which can greatly improve its hysteretic behavior and energy dissipation capability. Therefore, the CFSMs with a large width-to-thickness ratio can be improved by adding lips and intermediate stiffeners, and can be used more extensively in residential buildings located in seismic areas.

국제적 영업비밀 침해소송에서의 국내법의 일반적 역외적용 가능성 ― 국제관습법의 형성원리를 통한 전망 ―

최동준 ( Choi¸ Dong-jun ) 한양대학교 법학연구소 2021 법학논총 Vol.38 No.1

최근 기업의 영업비밀 및 중요 산업기술이 침해되는 모습을 보면 많은 경우 해외의 경쟁사에 의한 기술전문인력의 부정스카우트 등 국경을 초월한 형태로 나타나고 있다. 하지만 이에 대한 법적 대응 시 각국의 영업비밀보호법 등 관련 보호법제가 정비되어 있음에도 국외에서의 행위에 대한 재판관할 확대의 한계로 인해 이를 적절하게 규율하지 못할 위험이 존재한다. 즉, 기존의 국제재판관할 및 준거법 결정에 대한 이론은 원칙적으로 개별 국가의 영토 경계를 국가주권의 행사를 위한 재판관할 및 입법관할의 범위로 파악하였기에 세계화·국제화된 오늘날의 상황에 부합하는 적절한 법리라고 할 수 없으며, 국외의 영업비밀에 대한악의의 침해자가 이러한 구조적 한계를 악용할 소지도 다분하다. 그러므로 현시점에서 국제재판관할 확대의 법리 및 그 궁극적 귀결로서 국내법인 영업비밀보호법의 역외적용 법리에 대한 재검토가 필요하며, 이는 미래적 관점에서 국제사회를 단일의 경제공동체로 파악하거나 최소한 세계화로 인한 초밀접사회의 현실에 기반한 것이어야 할 것이다. 이러한 시각에서 본 논문은 영업비밀 및 산업기술 보호를 위한 국제적 차원의 재판관할 및 입법관할 법리에 대한 변화의 필요성을 인식하고, ‘국내법으로서의 영업비밀보호법의 역외적용’이 국제질서 하에서 일반적으로 이루어질 수 있을지에 대하여 검토하여 보았다. 하지만 이 문제는 현실적 필요성이 있다고 하여 바로 실행될 수 있는 것이 아니고, 기존의 재판관할에 대한 법리에 부합하여야 할 것인데, 그 기준이 되는 법리는 현재의 이에 관한 국제법이 될 것이다. 그러므로 국제법의 대표적 법원(法源)은 조약 및 국제관습법이기에 그것이 이미 존재하는 경우에는 그 내용을 절차법적·실체법적 차원으로 구분하여 검토하여 보았고, 존재하지 않거나 명확하지 않은 경우에는 기존의 다른 규정 및 법리들로부터 그 내용을 추측해 보았다. 또한 국제관습법이라는 것은 국제사회에서의 국제정치질서의 반영이라고도 볼 수 있기에 앞서의 법리적 검토와는 다른 차원에서 미래의 관련 국제법의 변화모습을 검토해보고자 국제정치학적 관점에서 향후 영업비밀보호법의 역외적용에 대한 현실적 가능성을 전망해 보았는데, 이를 위하여 과거 경쟁법의 역외적용 사례를 분석하여 보았으며 그 결과 국내법의 역외적용이 국제적 차원에서 보편화되기 위해서는 3가지 조건이 충족되어야 함을 알았다. 분석결과 결론적으로 기존의 주권국가의 영토를 경계로 하는 재판관할 및 준거법의 결정법리는 극복되고 있으며, 각국의 영업비밀보호 관련 입법관할 및 재판관할 범위는 좀 더 유연하게 해석할 수 있어야 함을 파악하였다. 그리고 이와 같은 방향성 하에 국내법으로서의 영업비밀보호법의 역외적용이 일반적으로 가능해지는 모습이 미래의 국제재판관할 및 준거법 결정에 대한 국제관습법이 될 수 있음을 예측해볼 수 있었다. 이는 과거 경쟁법의 역외적용이 세계적으로 일반화 되어가던 모습과 유사하며, 또한 이러한 해석이 현재의 영업비밀보호를 위한 관련 국내법 및 국제법 규정과 배치되지 않음도 확인하였다. Recently, corporate trade secrets and important industrial technical information have been misappropriated internationally in many cases, such as unlawful scouts of technical expert employees by overseas competitors. However, there is a risk that the trade secret protection system cannot be properly operated due to the limitations of the expansion of a nation’s jurisdiction over overseas activities, even though related protection laws such as the trade secrets protection acts are in place. In other words, existing legal principles of the international jurisdiction and the choice of law, which have identified the territorial boundaries of individual nations as the scope of jurisdiction and jurisdiction to prescribe for the exercise of the national sovereignty, are not appropriate for a today's highly globalized and internationalized society, where international transactions have become very frequent, and it is highly likely that a competitor who wants to misappropriate trade secrets willfully from outside the border will exploit these structural defects of the principle regarding the international jurisdiction and the choice of law. Therefore, it is time to review the legal principle of the international jurisdiction expansion and the extraterritorial application of a domestic trade secrets protection act as its ultimate conclusion, and the modified principle needs to be based on a view of the future of an international society as a single economic community or at least it should be based on the reality of a close-knit society caused by globalization. This study recognized the need for changes of the legal principle in jurisdiction and jurisdiction to prescribe at the international level for the protection of trade secrets and industrial technical information, and examined whether ‘the extraterritorial application of a domestic trade secrets protection act’ could be universalized under the international order. However, this problem cannot be solved immediately just because there is a real need, but it must be in accordance with the existing legal principle of jurisdiction, and the principle on which it is based will be the current international law regarding this matter. Therefore, in a case when the treaties and customary international laws, which are considered as the two main sources of international law, are already existed regarding this matter, they were analyzed by procedural and substantial legal dimensions respectively, and the international laws were speculated from other existing regulations and legal principles in a case when they do not exist or are unclear. In addition, since customary international law is a reflection of international political order in an international society, we have predicted a realistic possibility of the extraterritorial application of a domestic trade secrets protection act from an international political perspective other than legal perspectives in order to examine the future changes in international law. To this end, we analyzed the cases of the extraterritorial application of the competition law in the past and found that three conditions must be met in order for the extraterritorial application of a domestic law to become common at the international level. In conclusion, the analysis of this study shows that the legal principles of the international jurisdiction and the choice of law that border on the territories of existing sovereign nations are being overcome, and the interpretation of the scope of the jurisdiction to prescribe for the trade secret protection and the jurisdiction of related disputes is being more flexible in a globalized society. And with this direction, it could be predicted that the global generalization of extraterritorial application of a domestic trade secret protection act could become a future customary international law for the international jurisdiction and the choice of law. This is similar to the global generalization of extraterritorial application of the competition law in the past, and it was also confirmed that this interpretation does not contradict the current relevant domestic and international laws for the trade secret protection.

COVID-19와 재생에너지 보급에 따른 전력수요 변화 분석 및 대응방안 제시

한동준(Dongjun Han),김준수(Junsu Kim),김승우(Seungwoo Kim),원동준(Dongjun Won) 대한전기학회 2020 대한전기학회 학술대회 논문집 Vol.2020 No.10

Artificial Bee Colony 최적화 기법 기반 3-다이오드 PV 모델 파라미터 추정

한동준(Dongjun Han),무하마드 아샨 자미(Muhammad Ahsan Zamee),원동준(Dongjun Won) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.7

LSTM 및 GRU 기반 전력계통 과도안정도 판정

한동준(Dongjun Han),이영상(Yeongsang Lee),박영인(Youngin Park),원동준(Dongjun Won) 대한전기학회 2022 대한전기학회 학술대회 논문집 Vol.2022 No.4

서울시 구로구에서 COVID-19 발생 전ㆍ후 초미세먼지(PM2.5) 농도 변화에 따른 인구집단 노출평가

김동준(Dongjun Kim),민기홍(Gihong Min),최영태(Yongtae Choe),신준섭(Junshup Shin),우재민(Jaemin Woo),김동준(Dongjun Kim),신정현(Junghyun Shin),조만수(Mansu Jo),성경화(Kyeonghwa Sung),최윤형(Yoon-hyeong Choi),이채관(Chaekwan Lee),최길용(K 한국환경보건학회 2021 한국환경보건학회지 Vol.47 No.6

Background: The coronavirus disease (COVID-19) has caused changes in human activity, and these changes may possibly increase or decrease exposure to fine dust (PM2.5). Therefore, it is necessary to evaluate the exposure to PM2.5 in relation to the outbreak of COVID-19. Objectives: The purpose of this study was to compare and evaluate the exposure to PM2.5 concentrations by the variation of dynamic populations before and after the outbreak of COVID-19. Methods: This study evaluated exposure to PM2.5 concentrations by changes in the dynamic population distribution in Guro-gu, Seoul, before and after the outbreak of COVID-19 between Jan and Feb, 2020. Gurogu was divided into 2,204 scale standard grids of 100 m×100 m. Hourly PM2.5 concentrations were modeled by the inverse distance weight method using 24 sensor-based air monitoring instruments. Hourly dynamic population distribution was evaluated according to gender and age using mobile phone network data and time-activity patterns. Results: Compared to before, the population exposure to PM2.5 decreased after the outbreak of COVID-19. The concentration of PM2.5 after the outbreak of COVID-19 decreased by about 41% on average. The variation of dynamic population before and after the outbreak of COVID-19 decreased by about 18% on average. Conclusions: Comparing before and after the outbreak of COVID-19, the population exposures to PM2.5 decreased by about 40%. This can be explained to suggest that changes in people’s activity patterns due to the outbreak of COVID-19 resulted in a decrease in exposure to PM2.5.

Development of 3D Imaging Equipment Available in Radioactive and Underwater Environments

Dongjun Hyun,Sungmoon Joo,Ikjune Kim,Jaehyun Ha,Jonghwan Lee 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.2

3D imaging equipment is essential for automated robotic operations that cut radiologically contaminated structure and transfer segmented pieces in nuclear facility dismantling site. Automated dismantling operations using programmed robotic arms can make conventional nuclear facility dismantling operations much more efficient and safer, so dismantling technologies using robotic arms are being actively researched. Resolving the position uncertainty of the target structure is very important in automated robot work, and in general industries, the problem of position uncertainty is solved through the method of teaching the robot in the field, but at the nuclear facility dismantling site, the teaching method by workers is impossible due to activated target structures. Therefore, 3D imaging equipment is a key technology for a remote dismantling system using automated robotic arms at nuclear facility dismantling site where teaching methods are impossible. 3D imaging equipment available in radioactive and underwater environments is required to be developed for a remote dismantling system using robotic arms because most commercial 3D scanners are available in air and certain 3D scanners available in radioactive and underwater environments cannot satisfy requirements of the remote dismantling system such as measurement range and radiation resistance performance. The 3D imaging equipment in this study is developed based on an industrial 3D scanner available in air for efficient development. To protect the industrial 3D scanner against water and radiation, a housing is designed by using mirrors, windows and shieldings. To correct measurement errors caused by refraction, refraction model for the developed 3D imaging equipment is defined and parameter studies for uncertain variables are performed. The 3D imaging equipment based on the industrial 3D scanner has been successfully developed to satisfy the requirements of the remote dismantling system. The 3D imaging equipment can survive up to a cumulative dose of 1 kGy and can measure a 3D point cloud in the air and in water with an error of less than 1 mm. To achieve the requirements, a proper industrial 3D scanner is selected, a housing and shielding for water and radiation protection is designed, refraction correction are performed. The developed 3D imaging equipment is expected to contribute to the wider application of automated robotic operations in radioactive or underwater environments.

Experimental Studies on Self-Oscillation of a Swirl Coaxial Injector

Dongjun Kim,Wonho Jeong,Jihyuk Im,Youngbin Yoon 한국추진공학회 2004 한국추진공학회 학술대회논문집 Vol.2004 No.5