The Effects of Electro Slag Welding on Material Properties of Box Column Plates

Cheng-Cheng Chen,Yu-Chen Liang2 한국강구조학회 2011 International Journal of Steel Structures Vol.11 No.2

The effects of electro slag welding (ESW) on the material properties of box column plates, which is ASTM A572 Gr. 50steel, were investigated experimentally and numerically. The material properties of the column plates before and after ESW were evaluated by macro-etching observation, micro-structural observation, and CVN impact tests. The temperature distribution of the column plates, with the ESW heat cycle as the heat input, was simulated by using the ANSYS FEM software. It was found that: (1) The CVN values in the through thickness direction of the base metal can be as low as 14J, 8.1J, and 8.1J at 0oC for plate thicknesses of 32, 40, and 50 mm respectively; (2) During the ESW process, the measured peak temperature for a 25×50 mm column plate surface was as high as 1033, 880 and 744oC for plate thicknesses of 32, 40 and, 50 mm respectively;(3) After the ESW heat cycle, the through thickness CVN value decreased by 68% for the coarse grain heat affected zone (HAZ) of the column pate; (4) The FEM thermal conduction model developed was able to simulate the temperature distribution of the steel plate during the ESW process with reasonable accuracy; (5) To avoid welding penetration due to ESW, a minimum plate thickness is suggested; (6) The impact of ESW heat cycle is more significant for thin column plates compared to thick ones.

The Impact of Excess Pore Pressure on the Support Stability of a Shield When Tunnelling in Sand Stratum

Yu Liang,Jian Zhang,Xiangyu Chen 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.8

When the large-diameter shield tunneling through the soft soil stratum, the pore pressure fluctuation would influence the tunnel stability, yet how it affected was still hard to figure out. Based on field tests data collected from a tunnel project in China, the distribution characteristics of excess pore pressure in sand stratum were obtained. By combining the limit equilibrium theory and variational calculus method, a modified formula of the limit support pressure was proposed, considering the effects of excess pore pressure and slope angle. The results showed that the excess pore water pressure had a big influence on the fracture angel of the sliding surface and the support pressure of the shield. If the effect of the pore pressure were taken into account, the support pressure should be set larger than the normal condition when the shield entered sand layer. The limit support pressure would decrease with the increase of the cohesive force and friction angle. Thus, effective reinforcement on the stratum should be adopted before the shield passing through.

Seismic response of combined retaining structure with inclined rock slope

Yu-liang Lin,Jie Jin,Zhi-hao Jiang,Wei Liu,Hai-dong Liu,Rou-feng Li,Xiang Liu 국제구조공학회 2022 Structural Engineering and Mechanics, An Int'l Jou Vol.84 No.5

A gravity wall combined with an anchoring lattice frame (a combined retaining structure) is adopted at a typical engineering site at Dali-Ruili Railway Line China. Where, the combined retaining structure supports a soil deposit covering on different inclined rock slopes. With an aim to investigate and compare the effects of inclined rock slopes on the response of combined retaining structure under seismic excitation, three groups of shaking table tests are conducted. The rock slopes are shaped as planar surfaces inclined at angles of 20°, 30°, and 40° with the horizontal, respectively. The shaking table tests are supplemented by dynamic numerical simulations. The results regarding the horizontal acceleration response, vertical acceleration response, permanent displacement mode, and axial anchor force are comparatively examined. The acceleration response is more susceptible to outer structural profile of combined retaining structure than to inclined angle of rock slope. The permanent displacement decreases when the inclined angle of the rock slope increases within a range of 20°-40°. A critical inclined angle of rock slope exists within a range of 20°-40°, and induces the largest axial anchor force in the combined retaining structure.

Selective Radiotherapy after Distant Metastasis of Nasopharyngeal Carcinoma Treated with Dose-Dense Cisplatin plus Fluorouracil

Liang, Yong,Bu, Jun-Guo,Cheng, Jin-ling,Gao, Wei-Wei,Xu, Yao-Can,Feng, Jian,Chen, Bo-Yu,Liang, Wei-Chao,Chen, Ke-Quan Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.14

Purpose: To investigate the efficacy and safety of selective radiotherapy after distant metastasis of nasopharyngeal carcinoma (NPC) treated with dose-dense cisplatin plus fluorouracil. Materials and Methods: Eligible patients were randomly assigned to a study group treated with dose-dense cisplatin plus fluorouracil following selective radiotherapy and a control group receiving traditional cisplatin plus fluorouracil following selective radiotherapy according to a 1:1 distribution using a digital random table method. The primary endpoint was overall survival (OS). Secondary endpoints were progression-free survival (PFS), objective response rate, relapse or progression rate in the radiation field and treatment toxicity. Results: Of 52 patients in the study group, 20 cases underwent radiotherapy., while in the control group of 51 patients, 16 underwent radiotherapy. The median PFS, median OS, survival rates in 1, 2 and 3 years in study and control group were 20.9 vs 12.7months, 28.3 vs 18.8months, 85.2%vs 65.9%, 62.2% vs 18.3%, and 36.6%vs 5.2% (p values of 0.00, 0.00, 0.04, 0.00 and 0.00, respectively). Subgroup analysis showed that the median OS and survival rates of 1, 2, 3 years for patients undergoing radiotherapy in the study group better than that in control group( 43.2vs24.1 months, 94.1% vs 86.7%, 82.4% vs 43.3%, 64.7% vs 17.3%, (p=0.00, 0.57, 0.04 and 0.01, respectively). The complete response rate, objective response rate after chemotherapy and three months after radiotherapy, relapse or progression rate in radiation field in study group and in control group were 19.2% vs 3.9%, 86.5% vs 56.9%, 85% vs 50%, 95% vs 81.3% and 41.3% vs 66.7% (p =0.03, 0.00, 0.03,0.30, 0.01 respectively). The grade 3-4 acute adverse reactions in the study group were significantly higher than in the control group (53.8% vs 9.8%, p=0.00). Conclusions: The survival of patients benefits from selective radiotherapy after distant metastasis of NPC treated with dose-dense cisplatin plus fluorouracil.

An application of quantitative feedback theory in a 3D active vibration isolation platform

Yu-Liang Chung,Meng Shiun Tsai,Jen-Hua Wu 한국소음진동공학회 2003 한국소음진동공학회 국제학술대회논문집 Vol.2003 No.8

Prevalence, Risk Factors, and Psychological Effects of Overactive Bladder in Chinese University Students

Yu Liang,Guo Wei Si,Hui Jie Hu,Zhen Wei Zhang,Cui Ping Song,Qi Feng Dou,Jian Guo Wen 대한배뇨장애요실금학회 2022 International Neurourology Journal Vol.26 No.4

Purpose: The purpose of this study was to investigate the prevalence and risk factors of overactive bladder (OAB) in young adults and to explore the influence of OAB on mental health. Methods: Between October 2019 and January 2020, 14,010 anonymous questionnaires were distributed to freshmen at 2 universities in Henan, China. The students came from all over the country. The questionnaire included general items and information necessary to calculate the overactive bladder symptom score, the Chinese version of the Pittsburgh Sleep Quality Index (PSQI) score, Self-Esteem Scale (SES) score, and Self-Rating Depression Scale (SDS) score. The relationships between the prevalence of OAB and its risk factors were evaluated. Results: The overall prevalence of OAB was 6.0%, with 4.3% of participants characterized as having dry OAB and 1.7% as having wet OAB. The prevalence of mild OAB was 5.5%, and that of moderate OAB was 0.5%; no severe OAB was observed. Higher prevalence rates of OAB were found among women, respondents with constipation, and respondents with primary nocturnal enuresis (PNE) (P <0.05). Compared to healthy controls, the OAB group exhibited a higher mean SDS score (52.12±8.986 vs. 47.71±9.399, P<0.001) and mean PSQI score (5.28±2.486 vs. 4.27±2.431, P<0.001), but a lower mean SES score (27.78±3.599 vs. 29.57±4.109, P<0.001). Conclusions: OAB significantly affects the mental health of young adults. Female sex, constipation, and PNE are risk factors for OAB.

Effect of different alfalfa cultivars on growth and development of the spotted alfalfa aphid, Therioaphis trifolii(Monell)

Yu Liang‐bin,Lin Ke‐Jian,Xu Lin‐bo,Wang Hui,Cui Jin,Zhang Quan‐yi,Wang Ya‐ping,Yan Li‐ying 한국곤충학회 2022 Entomological Research Vol.52 No.3

Therioaphis trifolii (Monell) is a well-known pest in alfalfa cultivation in China. Individuals of T. t r i f o l i i were allowed to feed on 10 alfalfa cultivars and their growth, reproduction, and population life table parameters were estimated. Nymphs that fed on Hunter River had the longest development time, whereas nymphs that fed on Defu had the shortest development time. Adults that fed on Debao, Zhongmu No. 2, and Defu had the shortest development time, whereas adults that fed on Golden Empress and Hunter River had the longest development times. Individuals that fed on Zhungeer produced the greatest number of offspring (13.950), and those that fed on Hunter River produced the fewest offspring (6.000). The survival rate of T. t r i f o l i i was the highest on Algonquin and lowest on Hunter River, whereas the survival time was the longest on Golden Empress and shortest on Debao. The population that fed on Algonquin had the highest intrinsic growth rate (0.560) and shortest population doubling time (1.237 days), whereas those that fed on Hunter River had the lowest intrinsic growth rate (0.217) and longest population doubling time (3.194 days). The life table parameters of the experimental T. t r i f o l i i population were used to quantify the resistance strengths of the cultivars. Results indicate that the Hunter River cultivar may effectively resist damage from T. trifolii. This study provides a theoretical basis for breeding aphid-resistant alfalfa cultivars, enabling further research into the prevention and control of aphid infestation.

Pretreatment Thrombocytosis as a Prognostic Factor in Women with Gynecologic Malignancies: a Meta-analysis

Yu, Min,Liu, Lei,Zhang, Bing-Lan,Chen, Qi,Ma, Xue-Lei,Wu, Yu-Ke,Liang, Chun-Shui,Niu, Zhi-Min,Qin, Xin,Niu, Ting Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.12

Background: This study was performed to analyze the prognostic implications of pretreatment or preoperative thrombocytosis in women with gynecologic malignancies. Material and Methods: We surveyed 2 medical databases, PubMed and EMBASE, to identified all relevant studies. A total of 14 (n=3,490) that evaluated the link between thrombocytosis and 5-year survival were included. REVMAN version 5.1 was used for our analysis and publication bias was evaluated using the Begg's funnel plot and tested by STATA 11.0. Risk ratios (RRs) with 95% confidence intervals (CIs) generated by the random effect model were used to assess the strength of any association. Results: 709(20.3%) of the 3,490 patients exhibited thrombocytosis (platelet counts > $400{\times}10^9/L$) at primary diagnosis, and their mortality was 1.62-fold higher compared with the others (RR=1.62, 95%CI=[1.28-2.05], p<0.0001). Thrombocytosis failed to have a stronger effect on the survival of advanced patients of stages III to IV in our study (n=478, RR=1.29, 95% CI=[1.13-1.48], p=0.0003), nor in women with cervical cancer in stage IB (n=1371, RR=1.73, 95% CI=[1.71-2.58], p=0.007). In addition, when adjusted for different carcinoma, it was associated with worse prognosis for all except the ones with vulvar cancer (n=201, RR=0.43, 95% CI=[0.14-1.29], p=0.13). Conclusions: This meta-analysis indicated that thrombocytosis might be associated with a worse prognosis for patients with gynecologic malignancies but without specificity or sensitivity for the ones in advanced stage. When adjusted for different gynecologic malignancies, it showed a significant effect on survival of all except vulvar cancers.

The National Health Insurance Research Database (NHIRD)

Liang-Yu Lin,Charlotte Warren-Gash,Liam Smeeth,Pau-Chung Chen 한국역학회 2018 Epidemiology and Health Vol.40 No.-

Electronic health records (EHRs) can provide researchers with extraordinary opportunities for population based research. The National Health Insurance system of Taiwan was established in 1995 and covers more than 99.6% of the Taiwanese population; this system’s claims data are released as the National Health Insurance Research Database (NHIRD). All data from primary outpatient departments and inpatient hospital care settings are included in this database. After a change and update in 2016, the NHIRD is maintained and regulated by the Data Science Centre of the Ministry of Health and Welfare of Taiwan. Datasets for approved research are released in three forms: sampling datasets comprising two million subjects, disease-specific datasets, and full population datasets. These datasets are de-identified and contain basic demographic information, disease diagnoses, prescriptions, operations, and investigations. Data can be linked to governmental surveys or other research datasets. While only a small number of validation studies with small sample sizes have been undertaken, they generally report positive predictive values of over 70% across different diagnoses. Currently, patients cannot opt out of inclusion in the database, though this requirement is under review. In conclusion, the NHIRD is a large, powerful data source for biomedical research.

The Classic Security Application in M2M: the Authentication Scheme of Mobile Payment

( Liang Hu ),( Ling Chi ),( Hong-tu Li ),( Wei Yuan ),( Yu Yu Sun ),( Jian-feng Chu ) 한국인터넷정보학회 2012 KSII Transactions on Internet and Information Syst Vol.6 No.1

As one of the four basic technologies of IOT (Internet of Things), M2M technology whose advance could influence on the technology of Internet of Things has a rapid development. Mobile Payment is one of the most widespread applications in M2M. Due to applying wireless network in Mobile Payment, the security issues based on wireless network have to be solved. The technologies applied in solutions generally include two sorts, encryption mechanism and authentication mechanism, the focus in this paper is the authentication mechanism of Mobile Payment. In this paper, we consider that there are four vital things in the authentication mechanism of Mobile Payment: two-way authentication, re-authentication, roaming authentication and inside authentication. Two-way authentication is to make the mobile device and the center system trust each other, and two-way authentication is the foundation of the other three. Re-authentication is to re-establish the active communication after the mobile subscriber changes his point of attachment to the network. Inside authentication is to prevent the attacker from obtaining the privacy via attacking the mobile device if the attacker captures the mobile device. Roaming authentication is to prove the mobile subscriber`s legitimate identity to the foreign agency when he roams into a foreign place, and roaming authentication can be regarded as the integration of the above three. After making a simulation of our proposed authentication mechanism and analyzing the existed schemes, we summarize that the authentication mechanism based on the mentioned above in this paper and the encryption mechanism establish the integrate security framework of Mobile Payment together. This makes the parties of Mobile Payment apply the services which Mobile Payment provides credibly.