Research of Evaluation Mechanism of Petrochemical Informatization Projects Based on AHPP

Feng’an Wen 보안공학연구지원센터 2014 International Journal of Hybrid Information Techno Vol.7 No.6

To address unreasonable planning process and imbalanced budget for informatization projects of petrochemical enterprises, this paper designs an informatization projects evaluation model. Analytic Hierarchy Process (AHP) is introduced to provide theoretical support. First, this paper conducts a hierarchical analysis to the decisive project factors in the informatization construction by constructing judgment set for the ladder-type hierarchical mode. Then, it calculates the weight for each factor and makes reasonable decision, which provides guidance to the implement of the informatization projects of petrochemical enterprises.

5D 영화에서의 후각 디자인 제어 방법에 관한 연구

Feng,JiaJu,Pan,YoungHwan 한국서비스디자인학회 2018 한국서비스디자인학회 학술대회자료집 Vol.2018 No.2

Effect of Al on the Microstructure and Mechanical Properties of Mg–Sn–Ca–Mn Wrought Alloy

Yun Feng,Yuanyuan Yang,Zongqi Xiao,Xianglong Meng,Guorong Zhou,Jinfeng Leng,Xinying Teng 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.6

Mg–Sn–Ca–Mn–xAl (x = 0,1.5 wt%) alloys with ultra-fine recrystallized grains were prepared by conventional extrusion(400 °C, 0.5 mm/s). Effects of aluminum (Al) on mechanical properties and microstructure of the Mg–1Sn–1Ca–0.5Mn(wt%) alloy were systematically investigated. By the addition of 1.5 wt% Al, the yield strength of the as-extruded alloysignificantly increased from 183 to 237 MPa. The as-cast alloys show a dendritic structure consists of α-Mg, (Mg, Al)2Ca,and CaMgSn phases. The as-extruded Mg–1Sn–1Ca–0.5Mn–1.5Al alloys exhibit a bimodal grain structure composed ofdynamic recrystallized (DRXed) fine grains and coarse unDRXed grains. Compared with Al free alloy, a lot of nano-scaleplanar Al2Caand rectangle shape Al8Mn5precipitated in the as-extruded alloy with 1.5 wt% Al. Meanwhile, the addition ofAl significantly strengthened alloys’ fiber texture with < 10–10 >//ED.

Intragranular and Intergranular Crack Propagation in Nanocrystalline Ni Under Single-Cycle Mode I Loading

Yan Feng,Jie Li,Xinhua Yang 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7

As the first step to study the fatigue crack propagation, the molecular simulations were performed to investigate theopening, propagation and closure behaviors of intragranular and intergranular cracks in nanocrystalline Ni under single-cyclemode I loading. The atomic crack angle was proposed to characterize the crack-tip blunting and sharpening quantitatively. There are obvious different mechanisms between intragranular and intergranular crack propagation. Intragranular crack propagationcould be induced by stacking faults and can change its direction very easily, but the intergranular crack perpendicularto the loading direction would propagate along the grain boundary and encounter strong resistance at the triple junction. New cracks could form in the grain boundaries ahead of the original crack. Different from the traditional understanding forintragranular and intergranular cracks, however, the dislocation density increases even in the unloading process and the cracktip is possibly sharpened temporarily during loading.

"五·四"與中國現代文學的産生和發展

趙鳳翔 中國語文硏究會 1992 中國語文論叢 Vol.5 No.-

中高級漢語言語訓練與交際能力培養闡微

于逢春 대구대학교 인문과학 예술문화연구소 1999 人文科學硏究 Vol.20 No.-

In this paper, we expound the importance of the training ways in the field of teaching Chinese as a foreign language, especially in the intermediate and advanced stages. It is the key for the teacher to know how to train and cultivate the foreign student's parole skills and intercourse abilities, so the teacher should persist in the whole and synthetic principle and combine the training of parole skills with the cultivation of intercourse abilities. It can help the foreign students transfer their knowledges of languages into intercourse abilities. It is necessary to make up the objective materials for training the student's parole skills. This can be systematic and scientific by using computers.

만주국의 종교 정책과 재만 조선인의 종교 활동

崔峰龍 한양대학교 민족학연구소 2003 民族과文化 Vol.12 No.-

Three species of the family Noctuidae (Lepidoptera) new to China

Hui-Lin HAN,Zhao-Yao DUAN,Zhi-Wei FENG2 한국곤충학회 2008 Entomological Research Vol.38 No.3

Three species of the family Noctuidae –- Phlogophora striatovirens (Moore, 1867), Usbeca kulmburgi (Rebel, 1918) and Feliniopsis leucostigma (Moore, 1867) –- are reported for the first time from China. Photographs of adults and genital characteristics are provided.

배추 Plug育苗條件이 苗素質에 미치는 影響

李喆浩,崔周鎬,朴重春,孫嶺杰,朴鳳植,李炯貞 진주산업대학교 농업기술연구소 1999 農業技術硏究所報 Vol.12 No.-

배추 plug육묘 조건을 알아보기 위하여 상토 종류, 질소시비수준, plug트레이 배수공수준을 달리하여 실험한 결과를 요약하면 다음과 같다. 1. 유묘출현율은 A상토<B상토<C상토의 順으로 높았고, 질소시비수준은 무비구에서 높고, 시비구에서는 90∼90ppm수준에서 높은 편이었으며 배수공수에 따라서는 배수공이 적은 128공구가 출현율이 높았다. 2. 幼苗의 葉발생도 A상토<B상토<C상토 순으로 높았고, 질소시비수준은 다비구(150ppm구)에서 엽수 5배로 최대엽수를 나타내었고, 배수공수에 따라서는 배수공이 적은 128공구가 높았다. 3. 엽장의 길이는 A상토구는 128공구에서 질소시비수준 120ppm에서 6.98cm로 가장 길었으며, B상토구에서 128배수공구의 시비수준 150ppm에서 12.41cm로 가장 길었고, C상토구에서도 128배수공구의 시비수준 150ppm에서 12.88cm, 200배수공구에서도 9.29cm로 가장 길었고 무비구에서는 공히 가장 짧았다. 4. 葉幅도 엽수와 엽장과 비슷한 경향으로 기비로 사용된 질소의 시비수준이 증가할수록 엽장이나 엽폭이 증가하여 B상토구의 150ppm 시비구에서 4.80cm로 최대치를 나타냈으며 시비량이 감소할수록 엽폭도 줄어드는 경향이였다. 5. 뿌리의 신장은 A상토구의 128배수공구에서 질소질 함량이 90∼120ppm수준의 범위내에서 신장이 양호하였으나 150ppm시비구에서는 불량한 반면, B와 C상토구에서는 90∼150ppm 모두에서 양호하였다. 6. 생체중과 건물중도 상토조성, 질소질비료 및 트레이 크기에 따라 모두 크게 영향을 받는 것으로 나타났으며 C상토구의 150ppm시비구에서 주당 3.0g의 생체중에서 최대치를 보였고 건물중 역시 C상토구의 150ppm시비구에서 4주에 600mg의 생체중의 증가를 보여 최대의 기록을 나타냈고 질소질의 농도 150ppm이 생체중 및 건물중 증가에 가장 효과적인 것으로 나타났다. The experiments were conducted to develop ideal substrates for the production of good quality in cabbage plug and also to improve the media with low or non environmental pollution by blending and mixing artificial substrate including peat moss, coir, perlite, vermiculite, carbonized rice hull and zeolite. In effects of soil substrate combination, nitrogen concentration and tray cell size on growing of 'Baekro', chinese cabbage, the ratio of seedling emergency in all fertilizer block was higher than non-fertilizer of nitrogen by 80%. The number of leaves were most increased in the 150ppm nitrogen solution of B block(coir 50%, vermiculite 10% and perlite+carbonized rice hull-zeolite 40%) and C block(coir 40%, vermiculite 20% and perlite+carbonized rice hull+zeolite 40%). The leaf length and leaf width were similar with that result in the number of leaves. Rooting condition was the best in the 90∼120ppm nitrogen solution of A block(TOSILI No1, SHINAN-JEONGMIL(Co)) in 128 tray cell size. The fresh weight and dry weight were increased as the order A<B<C in soil combination, were increased in the fertilizer which has more nitrogen concentration and were increased higher in 128 than 200 tray cell size, and chlorophyll concentration was the highest in the 150ppm nitrogen solution of A and B soil combination.

Enumerating typical abelian prime-fold coverings of a circulant graph

Feng, R.,Kwak, J.H.,Kwon, Y.S. North-Holland Pub. Co ; Elsevier Science Ltd 2009 Discrete mathematics Vol.309 No.8

Enumerating the isomorphism classes of several types of graph coverings is one of the central research topics in enumerative topological graph theory (see [R. Feng, J.H. Kwak, J. Kim, J. Lee, Isomorphism classes of concrete graph coverings, SIAM J. Discrete Math. 11 (1998) 265-272; R. Feng, J.H. Kwak, Typical circulant double coverings of a circulant graph, Discrete Math. 277 (2004) 73-85; R. Feng, J.H. Kwak, Y.S. Kwon, Enumerating typical circulant covering projections onto a circulant graph, SIAM J. Discrete Math. 19 (2005) 196-207; SIAM J. Discrete Math. 21 (2007) 548-550 (erratum); M. Hofmeister, Graph covering projections arising from finite vector spaces over finite fields, Discrete Math. 143 (1995) 87-97; M. Hofmeister, Enumeration of concrete regular covering projections, SIAM J. Discrete Math. 8 (1995) 51-61; M. Hofmeister, A note on counting connected graph covering projections, SIAM J. Discrete Math. 11 (1998) 286-292; J.H. Kwak, J. Chun, J. Lee, Enumeration of regular graph coverings having finite abelian covering transformation groups, SIAM J. Discrete Math. 11 (1998) 273-285; J.H. Kwak, J. Lee, Isomorphism classes of graph bundles, Canad. J. Math. XLII (1990) 747-761]). A covering is called abelian (or circulant, respectively) if its covering graph is a Cayley graph on an abelian (or a cyclic, respectively) group. A covering p from a Cayley graph Cay(A,X) onto another Cay (Q,Y) is called typical if the map p:A->Q on the vertex sets is a group epimorphism. Recently, the isomorphism classes of connected typical circulant r-fold coverings of a circulant graph are enumerated in [R. Feng, J.H. Kwak, Typical circulant double coverings of a circulant graph, Discrete Math. 277 (2004) 73-85] for r=2 and in [R. Feng, J.H. Kwak, Y.S. Kwon, Enumerating typical circulant covering projections onto a circulant graph, SIAM J. Discrete Math. 19 (2005) 196-207; SIAM J. Discrete Math. 21 (2007) 548-550 (erratum)] for any r. As a continuation of these works, we enumerate in this paper the isomorphism classes of typical abelian prime-fold coverings of a circulant graph.