P.S. 콘크리트 보의 비선형 최적설계

정철원,최규문,손용우 圓光大學校 1994 論文集 Vol.28 No.2

비선형 최적설계법을 개발하였다. 이 방법의 목적은 PC구조물의 극한에서 나타나는 거동을 예측하는 것이다. 그에 따른 주요결과를 제시하였고 콘크리트와 강의 실제 거동의 실험 과정에서 겪는 난점을 거론하였다. 특히 PC강선에서 이용가능한 다양한 응력-변형 관계를 비교하고 실제 특성에서 나타난 차이점을 관찰하였다. 그 관계들에 관하여 추천된 식들의 해당계수를 제시하였다. 그 결과는 PC강선의 종류와 양, 비 프리스트레스 인장과 압축철근의 양, 극한 콘크리트압축변형 등과 같은 주요 변수들의 극한 거동에서 영향이 나타난다는 것이다. 그 영향과 결과를 유도한 규준을 비교하는 데에 중점을 두었다. 이 연구에서 얻은 결과들로써 만약 추천된 규준을 사용하는 경우에 그 규준이 불안정한 설계를 유도할 가능성이 있는 부분과 또 관찰된 경향에 알맞게 규준을 수정하기 위하여 필요한 점을 지적할 수 있게 되었다. An approximate nonlinear design procedure is development. It is the aim of the procedure to predict the behavior at ultimate of prestressed and partially prestressed concrete members. We showed the main results and discussed some difficulties which we come (on in) simulating the actual behavior of concrete and steel. Especially the various available stress-strain relationships for prestressing steels are compared and variability in their actual properties is observed. Corresponding coefficients of recommended equations are given. It is the result that the influence on ultimate behavior of major variables such as type and amount of prestressing steel, the amount of nonprestressed tensile, compressive reinforcement, and the ultimate concrete compressive strain exists. Then we put an empasis on comparing the influence with code derived results. By results of this study, we could point out that if used. where the recommended code may lead to an unsafe design and what modifications may be needed to make the code suitable to the observed trends.

鐵筋콘크리트 構造物의 最適設計

鄭哲源,朴熙淳,孫鎔雨,崔圭文 圓光大學校 1989 論文集 Vol.23 No.2

이 論文에서는 最適化問題를 해결한다 : 彈牲設計에 비해 最大效率로 주어진 形態의 構造를 設計하여 모든 可能한 荷重組合下에서 그 構造의 崩壞와 그것의 臨界斷面의 first yield에 대한 어떤 지정된 最小荷重係數를 측정한다. 目的函數를 線形化하고, 모든 limit equilibrium constraint를 算出해 내는 方法을 개발하여 線形計劃法과 콤퓨터技法의 도움으로 그 問題를 해결한다. 관계되는 원리와 대응되는 最適解는 鐵筋콘크리트 連續보와 뼈대 構造를 例로서 설명되어 있다. The following optimization problem is solved in the paper : design a structure of given geometry for maximum efficiency vs. elastic design, so that under any possible load combination certain specified minimum load factors be guaranteed against both the collapse of the structure and the first yield of its critical sections. By linearizing the objective function and developing a method to generate all limit equilibrium constraints the problem is solved with the help of linear programming and computer techniques. The principles involved and corresponding optimal solutions are illustrated by the examples of a reinforced concrete continuous beam and frame.

Study on the Establishment of Free Trade Zone Agricultural Tariffs in China, Japan and South Korea Based on the GTAP Model

Kou Zheng,Kou Lianxiang,Yang Honghong 한중경제문화학회 2019 한중경제문화연구 Vol.12 No.-

Study on the Coordinated Development of Pudong Airport Logistics and Regional Economy

Kou Zheng,Li Xi,Zhang Man 한중경제문화학회 2018 한중경제문화연구 Vol.11 No.-

China’s aviation cargo transportation has developed rapidly in recent years, airport logistics is the outcome of modern logistics and high-efficiency of traditional aviation cargo transportation. Because of the speed, convenience and safety of airport logistics, people increasingly tend to use airports to carry out activities in all aspects of logistics, the demand for airport logistics has exploded, and airport logistics has become an important factor to be considered in airport planning and later development now. The development of airport logistics has created the airport economy, the rise of the airport economy has become a new growth pole of the regional economy. At present, the construction of high-speed rails has caused bottlenecks in the development of aviation cargo transportation, and the advantages of airport logistics have been greatly weakened, therefore, airport logistics must find a solution out. Therefore, on the basis of summarizing the relevant literature, this article closely links airport logistics with related local industries, and seeks a new way for the coordinated development of airport logistics and regional economy. This article takes the Pudong New Area and Pudong Airport as examples to explore the driving factors for mutual boosting development between airport logistics and regional economy. Based on this, select Granger causality test to prove the causality between Pudong airport logistics and Pudong economy, and use the gray relational theory to calculate the gray relational degree of Pudong airport logistics and Pudong economy. According to the results of empirical analysis, summarized propose corresponding recommendations and provide effective suggestions for the Pudong government and related enterprises to promote coordinated development of airport logistics and regional economy.

Statistical Analysis on the Emotion Effects of Academic Achievement

Kou, Heung,Ko, Young Chun The Basic Science Institute Chosun University 2016 조선자연과학논문집 Vol.9 No.2

The purpose of this study is to investigate the emotion effects on academic achievement for university students. The results are as follows. Resulting on the each emotions difference by the statistical variables, anxiety scores by gender showed a significant difference in the p<.01 level(F=7.685). The males anxiety(2.478, standard deviation: 0.180) had significantly lower scores than females(3.076, standard deviation: 0.168). But fear, anger, activity, and sociability scores were not significantly different respectively between male and female students. To see the emotions effect of academic achievement, the analysis method of the linear regression line was used. As the result, anxiety, fear, anger, activity, and sociability did not significantly influence academic achievement. And so unlike previous methods, the analysis method of the quadratic regression curve was used. As the result, anxiety, fear, anger, activity, and sociability showed did significantly influence academic achievement respectively within 5% of statistical significance level, to more than F=3.06. Therefore, the values on academic achievement of the each anxiety, fear, anger, activity, and sociability showed a quadratic regression curve. That is, [Academic achievement]=$-0.9685{\times}[Anxiety]^2+5.1342{\times}[Anxiety]+8.2679$,[Academic achievement]=$-1.0638{\times}[Fear]^2+5.5694{\times}[Fear]+7.5635$,[Academic achievement]=$-1.3497{\times}[Anger]^2+9.1284{\times}[Anger]+0.6720$,[Academic achievement]=$-1.0589{\times}[Activity]^2+7.4386{\times}[Activity]+1.8272$,[Academic achievement]=$-1.6830{\times}[Sociability]^2+11.2325{\times}[Sociability]-3.8258$. Therefore, we were able to determine the following conclusions. First, we were able to predict the degree of academic achievement by the each emotions scale. Second, when the each emotion scores of students was a moderate, the academic achievement was most excellent. So, in order for the students to become higher academic achievement, the maintenance of medium degree of the each emotions scores is required.

Representation of Network Security Situation Elements Based on Cloud Model

Kou Guang,Yang Haopu,Wang Kun,Zhang Yuchen,Wang Shuo 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.5

Aiming at efficiently aware the network security situation, we proposed a framework of Network Security Situation Awareness on the base of Cloud Model. With network security situation elements at the core, we modified the Cloud Model to a novel concept, situation cloud, which act as theoretical foundation in the transition between the qualitative and quantitative representation on situation elements. Finally, the experimental results showed that these two kind of representations can directly summarize the secur

Interpolations for Holder's inequality

Kou Hei Izuchi,Ken Ji Izuchi,Shuichi Ohno 대한수학회 2013 대한수학회보 Vol.50 No.3

Kwon and Bae gave an interpolation for a continuous form of Holder's inequality for a real-valued bounded measurable function on a product of measure spaces. It is given some generalizations of their result.

The Regulation of Sugar Metabolism in Huangguan Pears (Pyrus pyrifolia Nakai) with Edible Coatings of Calcium or Pullulan during Cold Storage

Kou, Xiaohong,Jiang, Bianling,Zhang, Ying,Wang, Jun,Xue, Zhaohui Korean Society of Horticultural Science 2016 원예과학기술지 Vol.34 No.6

Sugars play many important roles in plant metabolism and directly influence fruit quality. The effects of two edible coatings, 2% calcium chloride and 1% pullulan, on sugar metabolism in postharvest Huangguan pear fruit were investigated during cold storage. The respiration rate, sugar content and composition, sucrose metabolism enzyme activities [acid invertase (AIV), neutral invertase (NI), sucrose synthase (SS), and sucrose phosphate synthase (SPS)] and expression of the AIV gene were analyzed during storage at $0^{\circ}C$ for 210 days. Coating treatments slowed the decrease of sucrose and hexose, the respiration rate, and the activities of AIV, NI, SS and SPS, thus maintaining high total soluble solids (TSS) and titratable acid (TA) contents in the fruit. There were no significant differences in AIV expression or activity between the treated and control groups of fruits. Both of the coatings could inhibit the activities of sucrose-cleaving enzymes, thus slowing the decrease of sugar content and maintaining high fruit quality during cold storage.

Comparative transcriptome analysis of Sweetpotato (Ipomoea batatas L.) and discovery of genes involved in starch biosynthesis

Kou Meng,Su Zai-Xing,Zhang Yun-Gang,Li Qiang 한국식물생명공학회 2020 Plant biotechnology reports Vol.14 No.6

Sweetpotato, Ipomoea batatas L., Convolvulaceae, rich in starch, is a major staple economically important root crop world wide. Limited functional genomics resources and whole genome studies could be improved through the development of next-generation sequencing technologies. Illumina sequencing of three sweetpotato varieties, Xushu 18, Xu 781 and Xushu 25, including de novo transcriptome assembly, functional annotation, and diferential expression of potential starch biosyn thesis-related genes are described. A total of 2508, 1807 and 3169 Mb clean reads were generated for Xushu 18, Xu 781 and Xushu 25, and were assembled into 32,112, 35,788 and 36,955 unigenes with an average length of 787, 802 and 824 bp, respectively. BLAST against the NCBI non-redundant protein, the Kyoto Encyclopedia of Genes and Genomes (KEGG) and the Gene Ontology (GO) databases have classifed these unigenes into functional categories for understanding gene functions and regulation pathways. The proportion of up-regulated DEGs was lower than that of the down-regulated DEGs among three sweetpotato cultivars. The similar proportion of the up/down-regulated gene number was presented between Xushu 25 and one of its parents (Xushu18 and Xu 781). Moreover, 14 unigenes related to starch biosynthesis in Xushu 18 and Xu 781were searched out from the transcriptome sequencing data. Furthermore, gene expression of these genes in storage root during diferent developing stages was also investigated, 6 types of gene expression patterns were summarized. The novel sequence dataset developed in this study will be helpful for the further genetic characterization and studies of starch biosynthesis in sweetpotato.

Rapid Detection of Noroviruses in Fecal Samples and Shellfish by Nucleic Acid Sequence-based Amplification

Kou Xiaoxia,Wu Qingping,Zhang Jumei,Fan Hongying The Microbiological Society of Korea 2006 The journal of microbiology Vol.44 No.4

The purpose of this study was to determine the efficacy of a nucleic acid sequence-based amplification (NASBA) method of detecting noroviruses in artificially and naturally contaminated shellfish. We used 58 fecal samples that tested positive for noroviruses with electron microscopy (EM) to develop an NASBA assay for these viruses. Oligonucleotide primers targeting the polymerase coding region were used to amplify the viral RNA in an isothermal process that resulted in the accumulation of RNA amplicons. These amplicons were detected by hybridization with digoxigenin-labeled oligonucleotide probes that were highly specific for genogroup I (GI) and genogroup II (GII) of noroviruses. The expected band of 327bp appeared in denaturing agarose gel without any nonspecific band. The specific signal for each amplicon was obtained through Northern blotting in many repeats. All fecal samples of which 46(79.3%) belonged to GII and 12(20.6%) belonged to GI were positive for noroviruses by EM and by NASBA. Target RNA concentrations as low as 5pg/ml were detected in fecal specimens using NASBA. When the assay was applied to artificially contaminated shellfish, the sensitivity to nucleic acid was 100pg/1.5g shellfish tissue. The potential use of this assay was also confirmed in naturally contaminated shellfish collected from different ponds in Guangzhou city of China, of which 24 (18.76%) out of 128 samples were positive for noroviruses; of these, 19 (79.6%) belonged to GII and 5 (20.4%) belonged to GI. The NASBA assay provided a more rapid and efficient way of detecting noroviruses in fecal samples and demonstrated its potential for detecting noroviruses in food and environmental samples with high specificity and sensitivity.