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( Bin Feng ),( Zhi-hui Wang ),( Duo Wang ),( Ching-yun Chang ),( Ming-chu Li ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.1
Compared to hiding information into digital image, hiding information into digital text file requires less storage space and smaller bandwidth for data transmission, and it has obvious universality and extensiveness. However, text files have low redundancy, so it is more difficult to hide information in text files. To overcome this difficulty, Wang et al. proposed a reversible information hiding scheme using left-right and up-down representations of Chinese characters, but, when the scheme is implemented, it does not provide good visual steganographic effectiveness, and the embedding and extracting processes are too complicated to be done with reasonable effort and cost. We observed that a lot of traditional and simplified Chinese characters look somewhat the same (also called lookalike), so we utilize this feature to propose a novel information hiding scheme for hiding secret data in lookalike Chinese characters. Comparing to Wang et al.`s scheme, the proposed scheme simplifies the embedding and extracting procedures significantly and improves the effectiveness of visual steganographic images. The experimental results demonstrated the advantages of our proposed scheme.
Chang-Ying Xie,Xing-Huan Wang,Guang-Bin Zhu,Xiang-Bin Liu 연세대학교의과대학 2012 Yonsei medical journal Vol.53 No.4
Purpose: To report the 5-year follow-up results of a randomized controlled trial comparing bipolar transurethral resection of the prostate (TURP) with standard monopolar TURP for the treatment of benign prostatic obstruction (BPO). Materials and Methods: A total of 220 patients were randomized to bipolar plasmakinetic TURP (PK-TURP) or monopolar TURP (M-TURP). Catheterization time was the primary endpoint of this study. Secondary outcomes included operation time, hospital stay, as well as decline in postoperative serum sodium and hemoglobin levels. All patients were assessed preoperatively and followed-up at 1, 6, 12, 24, 36, 48, and 60 months postoperatively. Parameters assessed included quality of life, transrectal ultrasound, serum prostate-specific antigen level, postvoid residual urine volume, maximum urinary flow rates (Qmax), and International Prostate Symptom Score. Patient baseline characteristics, perioperative data including complications, and postoperative outcomes were compared. Complication occurrence was graded according to the modified Clavien classification system. Results: PK-TURP was significantly superior to M-TURP in terms of operation time, intraoperative irrigation volume, resected tissue weight, decreases in hemoglobin and sodium, postoperative irrigation volume and time, catheterization time, and hospital stay. At 5 years postoperatively, efficacy was comparable between arms. No differences were detected in safety outcomes except that the clot retention rate was significantly greater after M-TURP. Conclusion: Our results indicate that PK-TURP is equally as effective in the treatment of BPO, but has a more favorable safety profile in comparison to M-TURP. The clinical efficacy of PK-TURP is long-lasting and comparable with M-TURP.
Bin Wu,Chang-Long Wang,Yong-Jiang Hu,Xiao-Lin Ma 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.6
This paper represents a novel less conservative stability criterion for time-delay systems with nonlinear disturbances. The main purpose is to obtain larger upper bound of the time-varying delay. A suitable Lyapunov- Krasovskii functional (LKF) with triple integral terms is constructed. Then, two new generalized double integral (GDI) inequalities are proposed which encompass Wirtinger-based double inequality as a special case. A simple case of the proposed GDI inequality is utilized to estimate double integral terms in the time derivative of the constructed LKF. Further, an improved delay-dependent stability criterion is derived in the form of linear matrix inequalities (LMIs). Finally, some numerical examples are given to illustrate the improvement of the proposed criteria.
Comparison of Primary Breast Cancer Size by Mammography and Sonography
Wang, Jian-Tao,Chang, Li-Ming,Song, Xin,Zhao, Li-Xin,Li, Jun-Tao,Zhang, Wei-Guo,Ji, Ying-Bin,Cai, Li-Na,Di, Wei,Yang, Xin-Yu Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.22
Purpose: To compare tumor size by mammography and sonography and align with pathological results in primary breast cancer cases. Materials and Methods: We retrospectively reviewed 95 primary breast cancer patients who underwent mammography and sonography from January 2011 to June 2012. The largest tumor diameter was chosen as sizing reference for each imaging modality. The measurements of mammography and sonography were considered concordant if they were within the measurement of pathological results ${\pm}0.5cm$. Pearson's correlation coefficient was calculated for imaging results. Results: The range of the maximum diameter was 0.6cm-10.5cm and mean value was $3.81{\pm}2.04cm$ by pathological results, 0.7cm-12.4 cm and $3.99{\pm}2.19cm$ by mammography, and 0.9cm-11.0cm and $3.63{\pm}2.01cm$ by sonography, respectively. Sonography (R: 0.754), underestimated tumor size, but had a better correlation with pathological tumor size compared to mammography (R: 0.676), which overestimated tumor size. Conclusions: Sonography is superior to mammography in assessment of primary breast cancer.
The Multiscale Global Monsoon System: Research and Prediction Challenges in Weather and Climate
Chang, Chih-Pei,Johnson, Richard H.,Ha, Kyung-Ja,Kim, Daehyun,Ngar-Cheung Lau, Gabriel,Wang, Bin,Bell, Michael M.,Luo, Yali American Meteorological Society 2018 Bulletin of the American Meteorological Society Vol.99 No.9
Chang-Feng Chi,Bin Wang,Zhong-Rui Li,Hong-Yu Luo,Guo-Fang Ding 한국식품과학회 2013 Food Science and Biotechnology Vol.22 No.4
Acid-soluble collagen from the cartilages of scalloped hammerhead (Sphyrna lewini, ASC-S), red stingray (Dasyatis akajei, ASC-D), and skate (Raja porosa,ASC-R) were isolated with yields of 5.64±0.41, 8.72±0.31,and 6.74±0.28% on the basis of wet weight, respectively. ASC-S, ASC-D, and ASC-R had glycine as the major amino acid with contents of 220, 231, and 228 residues/1,000 residues, respectively, and contained imino acid of 174, 155, and 142 residues/1,000 residues, respectively. Three kinds of collagens more likely were comprised of 2types of collagen (type I and II) and had some differences in primary structures. The denaturation temperatures (Tds)of the ASC-S, ASC-D, and ASC-R were 23.8, 15.1, and 12.1oC, respectively. Maximum solubility of the 3 ASCs in 0.5 M acetic acid was observed at pH 2, and a sharp decrease in solubility above 2%(w/v) was observed in the presence of NaCl. The 3 lyophilized collagens displayed loose, fibrous, and porous structures.
Zhang, Bin,Qian, Jing,Chang, De-Hui,Wang, Yang-Min,Zhou, Da-Hai,Qiao, Gou-Mei Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.5
Objective: The Von Hippel-Lindau syndrome (VHLD), an inherited neoplastic syndrome predisposing to central nervous system hemangioblastoma (CNS), pheochromocytoma (PCC), renal cell carcinoma(RCC), retinal hemangioma (RA) and renal cysts, is caused by mutations or deletions of the VHL tumor-suppressor gene. To assess VHL genotype-phenotype correlations with function of pVHL a gene mutation analysis of members in a Chinese family with non-syndromic PCCs and individuals with apparently sporadic pheochromocytoma (ASP) was performed. Materials and Methods: DNA samples of 20 members from the Chinese family with non-syndromic PCCs and 41 patients with ASP were analyzed by polymerase chain reaction and direct sequencing, confirmed by Taqman probe. Results: Three novel mutations (H125P, 623(^TTTGTtG) and R120T) were identified in the Chinese family and in 3 among 41 ASP patients. The mutations were all located in exon 2 of VHL gene encoding ${\beta}$-domain of pVHL. The tumor type in H125P carriers and R120T carriers was VHL type 2C. And 623(^TTTGTtG) carriers presented VHL type 2B or type 2C. Conclusions: VHL gene abnormalities were identified in the Chinese family with non-syndromic PCCs and patients with APS, resulting in dysfunction of pVHL. H125P and R120T could be associated with VHL type 2C, while 623(^TTTGTtG) might be linked with VHL type 2B or type 2C. Not only is the genetic analysis helpful for early diagnosis and treatment of patients with VHLD, it is also benefitial for research intoVHLD pathogenesis.
Ce 첨가에 따른 저온수성가스전이반응용 Cu/Zn 촉매의 활성 연구
변창기(Chang Ki Byun),임효빈(Hyo Bin Im),박지혜(Jihye Park),백정훈(Jeonghun Baek),정정민(Jeongmin Jeong),윤왕래(Wang Ria Yoon),이광복(Kwang Bok Yi) 한국청정기술학회 2015 청정기술 Vol.21 No.3
산화세륨의 첨가가 수성가스전이반응 효율에 미치는 영향을 조사하기 위해서, Cu-ZnO-CeO₂촉매를 공침법을 사용하여 제조하였다. 일련의 Cu-ZnO-CeO₂ 촉매는 Cu 함량(50 wt%)을을 고정시키고 산화세륨(CeO₂ 기준으로, 0, 5, 10, 20, 30, 40 wt%)의 함량을 조절하면서 제조되었고 이를 이용하여 GHSV 95,541 h<SUP>-1</SUP>의 기체 유량범위, 200~400 ℃의 온도범위에서 수성가스전이반응 촉매활성이 측정되었다. 또한, BET, SEM, XRD, H₂-TPR, XPS 분석을 통하여 촉매특성이 분석되었다. CeO₂가 첨가된 촉매는 구리 분산도와 결합에너지 같은 촉매특성의 다양한 변화를 나타내었다. 10wt%의 CeO₂가 최적의 첨가량으로 판단되며 이때 촉매는 가장 낮은 온도에서 환원이 일어났으며 반응에서 가장 높은 촉매 활성을 보였다. 또한 CeO₂가 첨가된 촉매는 CeO₂가 첨가되지 않는 촉매와 비교하여 높은 온도영역에서 활성이 향상되었다. 따라서, 최적 조성의 CeO₂첨가는 높은 구리 분산도, 낮은 결합에너지, 구리 금속의 응집 방지를 유도하여 높은 촉매활성을 유도하였다. In order to investigate the effect of cerium oxide addition, Cu-ZnO-CeO₂ catalysts were prepared using co-precipitation method for water gas shift (WGS) reaction. A series of Cu-ZnO-CeO₂ catalyst with fixed Cu Content (50 wt%, calculated as CuO) and a given ceria content (e.g., 0, 5, 10, 20, 30, 40 wt%, calculated as CeO₂) were tested for catalytic activity at a GHSV of 95,541 h<SUP>-1</SUP>, and a temperature range of 200 to 400 ℃. Cu-ZnO-CeO₂ catalysts were characterized by using BET, SEM, XRD, H₂-TPR, and XPS analysis. Varying composition of Cu-ZnO-CeO₂ catlysts led the difference characteristics such as Cu dispersion, and binding energy. The optimum 10 wt% doping of cerium facilitated catalyst reduction at lower temperature and improved the catalyst performance greatly in terms of CO conversion. Cerium oxide added catalyst showed enhanced activities at higher temperature when it compared with the catalyst without cerium oxide. Consequently, ceria addition of optimal composition leads to enhanced catalytic activity which is attributed to enhanced Cu dispersion, lower binding energy, and hindered Cu metal agglomeration.