http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Analytical Model and Numerical Simulation of High Level Injection in Si/SiGe HBTs
Yu, Zhi Ping,Dutton, Robert W.,Voorde, Paul Vande,Oh, Soo Young,Cottrell, Peter E. 대한전자공학회 1991 ICVC : International Conference on VLSI and CAD Vol.2 No.1
The high-level injection (FLI) behavior of Si/SiGe hetero-junction bipolar transistors (HBTs) is governed by the formation of a retarding potential barrier to the collector current flow at the base-collector junction. A quantitative, analytical model is developed to predict the barrier height dependence on the applied bias. Complete device I-V characteristics can subsequently he calculated based on this knowledge. Two-dimensional (2D) numerical simulation has also been carried out on such structure, revealing the 2D effects of the device operation. Several measures to alleviate the adverse effects of HLI on device performance are proposed.
Overexpression of Cyclooxygenase-1 Correlates with Poor Prognosis in Renal Cell Carcinoma
Yu, Zu-Hu,Zhang, Qiang,Wang, Ya-Dong,Chen, Jing,Jiang, Zhi-Mao,Shi, Min,Guo, Xin,Qin, Jie,Cui, Guang-Hui,Cai, Zhi-Ming,Gui, Yao-Ting,Lai, Yong-Qing Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.6
The aim of this study was to evaluate expression of COX-1 in renal cell carcinoma (RCC) and its prognostic value. mRNA of COX-1 was detected in 42 paired RCC and adjacent normal tissues with quantitative realtime polymerase chain reaction (qRT-PCR). Expression of COX-1 was also evaluated in 196 RCC sections and 91 adjacent normal tissues with immunohistochemistry. Statistical analysis was performed to assess COX-1 expression in RCC and its prognostic significance. The results of qRT-PCR showed mRNA levels of COX-1 in RCC tissues to be significantly higher than that in adjacent normal tissues (p < 0.001). Immunohistochemical assays also revealed COX-1 to be overexpressed in RCC tissues (p < 0.001). Statistical analysis demonstrated high expression of COX-1 was correlated with tumour size (p = 0.002), pathological stage (p = 0.003), TNM stage (p = 0.003, 0.007, 0.027, respectively), and tumour recurrence (p < 0.001). Survival analysis indicated patients with high expression of COX-1 had shorter survival time (p < 0.001), and COX-1 was an independent predictor. This is the first study to reveal overexpression of COX-1 in RRC and point to use as a prognostic marker in affected patients.
Effect of Light with Different Wavelengths on Nostoc flagelliforme Cells in Liquid Culture
( Yu Jie Dai ),( Jing Li ),( Shu Mei Wei ),( Nan Chen ),( Yu Peng Xiao ),( Zhi Lei Tan ),( Shi Ru Jia ),( Nan Nan Yuan ),( Ning Tan ),( Yi Jie Song ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.4
The effects of lights with different wavelengths on the growth and the yield of extracellular polysaccharides of Nostoc flagelliforme cells were investigated in a liquid cultivation. N. flagelliforme cells were cultured for 16 days in 500 ml conical flasks containing BG11 culture medium under 27 μmol·m-2·s-1 of light intensity and 25oC on a rotary shaker (140 rpm). The chlorophyll a, phycocyanin, allophycocyanin, and phycoerythrin contents in N. flagelliforme cells under the lights of different wavelengths were also measured. It was found that the cell biomass and the yield of polysaccharide changed with different wavelengths of light. The biomass and the yield of extracellular polysaccharides under the red or violet light were higher than those under other light colors. Chlorophyll a, phycocyanin, and allophycocyanin are the main pigments in N. flagelliforme cells. The results showed that N. flagelliforme, like other cyanobacteria, has the ability of adjusting the contents and relative ratio of its pigments with the light quality. As a conclusion, N. flagelliforme cells favor red and violet lights and perform the complementary chromatic adaptation ability to acclimate to the changes of the light quality in the environment.
DEVELOPMENT OF CHINA LIGHT-DUTY VEHICLE TEST CYCLE
Yu Liu,Zhi Xin Wu,Hua Zhou,Han Zheng Nan Yu,Xiao Pan An,Jing Yuan Li,Meng Liang Li 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.5
Driving cycles provide a basis for vehicle development and calibration and also serves as the foundation for energy consumption and emissions certification of vehicles. This paper presents the China Light-Duty Vehicle Test Cycle (CLTC) developed by the China Automotive Technology & Research Center (CATARC). First, the important steps and technical routes toward the CLTC development process are summarized. Second, the specific CLTC development process is presented in detail, including the data acquisition and data analysis procedures, weighting factor development and driving cycle construction. Then, the main driving characteristics of the New European Driving Cycle (NEDC), the Worldwide Harmonized Light-Duty Vehicles Test Cycle (WLTC), the Federal Test Procedure (FTP-75), the CLTC and the actual collected data are compared. The CLTC has low average speed, a high idle speed ratio and more frequent acceleration and deceleration characteristics. Finally, 70 vehicles are t ested based on the NEDC, WLTC, and CLTC according to their legislative procedures in the vehicle emission laboratories of the CATARC and the manufacturers. The results show that the CLTC’s fuel consumption is much higher than that of the NEDC and WLTC, and CLTC can effectively reflect the actual fuel consumption of users.
GVC의 전방 및 후방 참여가 ASEAN에서 중국의 OFDI에 미치는 영향
( Zhi-chun Yu ),( Meng Li ),( Young-jun Choi ) 한국동남아학회 2021 동남아시아연구 Vol.31 No.3
본 논문은 주로 ASEAN 글로벌 가치 사슬(GVC, global value chains)에 대한 전방 참여와 후방 참여가 중국의 아세안 투자에 미치는 영향을 연구한다. 연구 결과에 따르면 ASEAN 국가들의 GVC 전방 참여는 중국의 아세안 10개국 투자에 부정적인 영향을 미치는 반면 후방 참여는 긍정적인 영향을 미치는 것으로 나타났다. 아세안의 기술 발전, 고학력 노동력의 확대, 소비자 시장 소비 잠재력의 증가, 인프라 개선 및 시장 개방도는 중국의 아세안 투자를 유치하고 확대할 것이다. 이는 중국이 ASEAN 제조에 대한 투자 외에도 ASEAN 국가의 교육, 기술 연구 및 개발, 기반 시설 건설 및 3차 산업에 대한 투자를 촉진할 수 있음을 의미한다. 아세안 국가의 인건비는 아세안에 대한 중국의 투자와 긍정적인 상관관계가 있는 반면 천연자원은 부정적인 상관관계가 있다. 중국 기업은 아세안 국가의 풍부한 노동력을 최대한 활용하여 생산 비용을 절감하고 현지 소비 습관 및 선호도에 따라 시장을 적절하게 개발하여 가계 소비를 촉진하고 기업 이윤을 높일 것을 권장한다. 아세안 국가는 개방을 강화하고 인프라 건설을 개선하며 첨단 기술 인재 양성을 중시하고 중국을 포함한 더 많은 외국인 투자를 유치해야 한다. This paper mainly studies the impact of forward and backward participation in ASEAN global value chains on China's investment in ASEAN. The results show that forward participation in global value chains is negatively correlated with China's investment in ASEAN, while backward participation is positively correlated. The technological advancement of ASEAN, the expansion of the number of highly educated labor force, the increase of consumer market consumption potential, the improvement of infrastructure, and the degree of openness of the market will attract and expand China's investment in ASEAN. This means that in addition to investment in ASEAN manufacturing, China can also promote investment in education, technology research and development, infrastructure construction, and tertiary industries in ASEAN countries. The labor cost of ASEAN countries is positively correlated with China's investment in ASEAN, while natural resources are negatively correlated. It is recommended that Chinese companies make full use of the abundant labor resources of ASEAN countries, reduce production costs, and appropriately develop markets according to local consumption habits as well as preferences, stimulate household consumption, and increase corporate profits. ASEAN countries need to strengthen opening up, improve infrastructure construction, attach importance to the training of high-tech talents, and attract more foreign investment, including China.
Zhi-Yu Liu,Jie Yu,Fan-Fan Dai,Ruo-Ping Jiang,Tian-Min Xu 대한치과교정학회 2019 대한치과교정학회지 Vol.49 No.4
Objective: To investigate the three-dimensional lip vermilion changes after extraction and non-extraction orthodontic treatment in female adult patients and explore the correlation between lip vermilion changes and incisor changes. Methods: Forty-seven young female adult patients were enrolled in this study (skeletal Class III patients were excluded), including 34 lip-protruding patients treated by extraction of four first premolars (18 patients requiring mini-implants for maximum anchorage control and 16 patients without mini-implants) and 13 patients requiring non-extraction treatment. Nine angles, seven distances, and the surface area of the lip vermilion were measured by using pre- and posttreatment three-dimensional facial scans. Linear and angular measurements of incisors were performed on lateral cephalograms. Results: There were no significant changes in the vermilion measurements in the non-extraction group. The vermilion angle, vermilion height, central bow angle, height/width ratio, and vermilion surface area decreased significantly after the orthodontic treatment in the extraction groups, but the upper/lower vermilion proportion remained unchanged. Significant correlations were found between the changes in incisor position and those in vermilion angles, vermilion height, and surface area. Conclusions: Extraction of the four first premolars probably produced an aesthetic improvement in lip vermilion morphology. However, the upper/ lower vermilion proportion remained unchanged. The variations in the vermilion were closely related to incisor changes, especially the upper incisor inclination changes.
GUI Reliability Assessment based on Bayesian Network and Structural Profile
Zhi-Fang Yang,Zhong-Xing Yu,Bei-Bei Yin,Cheng-Gang Bai 보안공학연구지원센터(IJSIP) 2015 International Journal of Signal Processing, Image Vol.8 No.1
Graphical User Interfaces (GUI) is becoming increasingly important in the software field as it builds a friendly way between users and software through continuous interactions. A well-developed GUI is therefore an important factor of software quality. In particular, the reliability of GUIs is still on the way of development. Existing software reliability assessment techniques attempt to statistically describe the software testing process and predict the reliability of the system. However, those techniques are not suitable for GUI as quality of GUI is challenged by immense number of event interactions and complex structural profile etc. Furthermore, GUI has a wealth of information about GUI architecture, components, windows and their interactions with each other, which can be adopted to guide the testing process and establish confidence assessment of GUI. In this paper, a Bayesian network model of GUI reliability is introduced to discuss the reliability model topology and its issues encountered in the modeling process. A case is also presented to verify the validity of the model during the GUI reliability assessment process.
Ghost Cell Odontogenic Carcinoma Arising from Calcifying Cystic Odontogenic Tumor: A Case Report
Zhi-Yu Zhu,Yu Chen,Zhi-Gang Chu,Wei-Ping Zhang,Di Lv,Ning Geng,Ming-Zhong Yang 대한병리학회 2012 Journal of Pathology and Translational Medicine Vol.46 No.5
Ghost cell odontogenic carcinoma (GCOC) is an exceptionally rare and malignant odontogenic tumor with aggressive growth characteristics. We describe a case of GCOC which was considerably derived from a previously resected calcifying cystic odontogenic tumor (CCOT). Cellular atypia, mitotic activity, Ki-67 labeling index and matrix metalloprotease-9 positive expression rate were all increased in the currently resected specimen compared to the initial one. This is a rare case of malignant transformation of CCOT to GCOC with respect to its histopathological and immunohistochemical findings.