A Study on Operational Efficiency Analysis on the Value of Chinese Shipping Companies

Lin-Lin Cui,Jung-Suk Choi 해양환경안전학회 2022 해양환경안전학회지 Vol.28 No.3

Shipping companies are key components of the logistics industry, which is extremely significant in enhancing the country's comprehensive national power and promoting global trade development. In the context of the implementation of the new development pattern strategy in China and the impact of the global novel coronavirus (COVID-19), this paper takes 22 Chinese shipping listed companies as the research object and analyses the operational efficiency of them from 2011 to 2020 based on the Super-SBM DEA Model and Window DEA Model. Factors affecting the efficiency are further analyzed with the Tobit model. The research conclude that the operational efficiency of Chinese shipping companies as a whole shows a steady increase from 2011 to 2020. Although most of them are in a relatively effective operation state, fewer are absolutely effective companies. Besides efficiency among companies differs obviously, which indicates the potential of further improvement and promotion. What’s more, factors such as current economic development level, enterprise size, human resources quality and enterprise turnover speed have significant positive correlation to the operation efficiency of Chinese shipping listed companies, which is significant to improve the operation efficiency of Chinese shipping companies.

An Improved PSO Algorithm Based CommunityTopic Refinement Strategy for Social Network

Lin Cui,Caiyin Wang,Xiaoyin Wu 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.1

Aiming at the division roughness of topic classification existing in the most online social networks community, the improved particle swarm optimization algorithm is applied to refine community topics and concepts of community seeds and community topic are also introduced. In this paper, first of all, the explicit links existing in the community are mined, and the basic community structure is constructed, then the community content is deeply analyzed, according to implicit feature between nodes under online community, community topic categories are elaborately refined until structure is stable. Experiments show that this proposed algorithm can accelerate the convergence of the node and greatly improves the topic mining accuracy of online social network compared with the state-of-art CR2NDAS model and PLSA model.

Evaluation and Application of Fengyun‑4A/LMI Data in Tropical Cyclone Monitoring Over the Southeast Coast of China

Linli Cui,Jun Shi,Wei Guo,Yinglong Xu 한국기상학회 2022 Asia-Pacific Journal of Atmospheric Sciences Vol.58 No.5

Taking 8 tropical cyclones (TCs) in 2018 as examples, the data quality and the application potential of Fengyun-4 A (FY-4 A)Lightning Mapping Imager (LMI) in monitoring lightning activity and analyzing the relationship between lightning activityand TC intensity are investigated and evaluated over the southeast coast of China. A comparison shows that the diurnal variationand the radial spatial distribution of lightning activity from FY-4 A/LMI data, and the relationship between FY-4 A/LMI lightning activity and tropical cyclone (TC) intensity are mainly consistent with the existing ground-based observations. FY-4 A/LMI data are further utilized to analyze some issues that are controversial or contradictory in the existing studies,and results show that there are obvious differences in the spatial distribution of TC lightning between land and sea. When TCis located on the sea and the land, lightning activity presents a radial spatial distribution of high-low-high and low-mediumhigh,respectively. Higher lightning density is mainly concentrated in the west and south side of TC track. During the changeof TC intensity, the lightning activity in the outer rainband continues to be active, but the lightning activity in the eyewallregion may be a better indicator for the early warning of TC intensity. We conclude that FY-4 A/LMI has good performanceand practical potential in TC lightning monitoring and early warning.

A Technique to Enable the Corruption-aware Transport Protocols in Realistic Networks

Lin Cui,Xin Cui,고석주 에스케이텔레콤 (주) 2009 Telecommunications Review Vol.19 No.1

The traditional reliable transport protocols are originally designed for the wired networks, which regard any packet losses as the indication of network congestion and halve their congestion windows to alleviate the traffic overload of network. However, unlike in wired networks, non-congestion losses will severely degrade the performance of traditional transport protocols in wireless networks. Thus some corruption-aware transport protocols have been proposed to overcome the performance degradation caused by corruption. Unfortunately, the corruption-aware transport protocols cannot work in realistic networks up to now since the corrupted packets have been discarded by the link layer checksum mechanisms before they are delivered to transport layer. This paper proposes a technique to overcome this problem without disabling the link layer checksum mechanisms. Simulation results show that the performance of corruption-aware transport protocols are still far better than that of traditional ones while the proposed scheme is applied.

Fast selective ACK scheme for throughput enhancement of multi-homed SCTP hosts

Lin Cui,Seok Joo Koh,Woo Jin Lee IEEE 2010 IEEE communications letters Vol.14 No.6

<P>This Letter proposes a fast selective ACK scheme for Stream Control Transmission Protocol (SCTP) to enhance transmission throughput in multi-homing scenarios. In the proposed scheme, a multi-homed receiver sends SACK chunks to the sender over the fastest reverse path, which facilitates to inflate the congestion window and to retransmit the lost data packets as quickly as possible. Simulation results show that the proposed scheme could improve the throughput performance of multi-homed SCTP hosts under both normal SCTP and CMTSCTP cases if only the reverse paths have various one-way delays.</P>

Corruption-aware adaptive increase and adaptive decrease algorithm for TCP error and congestion controls in wireless networks

Cui, Lin,Koh, Seok J. John Wiley Sons, Ltd. 2009 International journal of communication systems Vol.22 No.5

<P>The conventional TCP tends to suffer from performance degradation due to packet corruptions in the wireless lossy channels, since any corruption event is regarded as an indication of network congestion. This paper proposes a TCP error and congestion control scheme using corruption-aware adaptive increase and adaptive decrease algorithm to improve TCP performance over wireless networks. In the proposed scheme, the available network bandwidth is estimated based on the amount of the received integral data as well as the received corrupted data. The slow start threshold is updated only when a lost but not corrupted segment is detected by sender, since the corrupted packets still arrive at the TCP receiver. In the proposed scheme, the duplicated ACKs are processed differently by sender depending on whether there are any lost but not corrupted segments at present. Simulation results show that the proposed scheme could significantly improve TCP throughput over the heterogeneous wired and wireless networks with a high bit error rate, compared with the existing TCP and its variants. Copyright © 2008 John Wiley & Sons, Ltd.</P>

Phase II Study on Dose Escalating Schedule of Paclitaxel Concurrent with Radiotherapy in Treating Patients with Locally Advanced Non-small Cell Lung Cancer

Cui, Lin,Liu, Xing-Xiang,Jiang, Yong,Liu, Jian-Jun,Zhou, Xiang-Rong,He, Xue-Jun,Chen, Jue,Huang, Xin-En Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.4

Objective: To evaluate clinical efficacy of a dose escalating schedule of paclitaxel concurrent with radiotherapy in treating patients with locally advanced non-small cell lung (NSCLC). Methods: Patients with locally advanced NSCLC were treated with conventional fractionated radiotherapy or three dimensional conformal radiotherapy (3 DCRT), concurrently with a dose escalating schedule of paclitaxel. All patients were divided into three groups, A with paclitaxel $30mg/m^2$, B with paclitaxel $60mg/m^2$ and C with paclitaxel $90mg/m^2$. Paclitaxel was repeated every week for a total of 4 or 6 weeks. Results: Among 109 patients, response rates were 68.8%, 71.1% and 71.8% (p>0.05) for group A (n=32), B (n=38), and C (n=39) respectively. Accordingly, disease control rates were 81.3%, 81.6% and 82.1% (p>0.05). Progression-free survival time was $8.0{\pm}5.0$ months, $11.6{\pm}6.1$ months, and $14.8{\pm}7.9$ months (p<0.05), respectively. Overall survival time was $15.4{\pm}7.6$ months, $18.2{\pm}8.0$ months, and $22.0{\pm}7.6$ months (p<0.05), one-year survival rates were 62.5%, 73.1% and 90.0% (p>0.05) and two-year survival rates were 31.3%, 38.5% and 50.0% (p<0.05). Main side-effects were bone marrow suppression, radiation related esophagitis and gastrointestinal reaction. Conclusion: In treating patients with NSCLC, concurrent chemoradiotherapy with paclitaxel improves early response compared with conventional fractionated radiotherapy or 3 DCRT. The survival rate was improved with the addition of paclitaxel, but there was an increase in adverse reactions when the dose of paclitaxel was increased.

Comparative Study on Transcatheter Arterial Chemoembolization, Portal Vein Embolization and High Intensity Focused Ultrasound Sequential Therapy for Patients

Cui, Lin,Liu, Xing-Xiang,Jiang, Yong,Wu, Xing-Jun,Liu, Jian-Jun,Zhou, Xiang-Rong,He, Xue-Jun,Huang, Xin-En Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.12

Objective: To investigate the safety and efficacy of transcatheter arterial chemoembolization (TACE), combined with portal vein embolization (PVE), and high intensity focused ultrasound (HIFU) sequential therapy in treating patients with hepatocellular carcinoma (HCC). Methods: Patients with inoperative HCC were treated by two methods: in the study group with TACE first, then PVE a week later, and then TACE+PVE every two months as a cycle, after 2~3 cycles finally HIFU was given; in the control group only TACE+PVE was given. Response (CR+PR), and disease control rate (CR+PR+SD), side effects, overall survival and time to progress were calculated. Results: Main side effects of both groups were nausea and vomiting. No treatment related death occurred. In the study group, 32 patients received TACE for overall 67 times, PVE 64 times, and HIFU 99 times; on average 2.1, 2 and 3.1 times for each patient, respectively. In the control group, 36 patients were given TACE 78 times and PVE 74 times, averaging 2.2 and 2.1 times per patient. Effective rate: 25.0% in study group and 8.3% in control group (p>0.05). Disease control rates were 71.9% and 44.4%, respectively (p<0.05). In patients with portal vein tumor thrombus, the rate reduced over 1/2 after treatment was 69.2%(9/13) in the study and 21.4%(3/14) in the control group (p<0.05). Rate of AFP reversion or decrease over 1/2 was 66.7%(16/24) in study and 37%(10/27) (p<0.05) in control group. Median survival time: 16 months in study and 10 months in control group. PFS was 7months in study and 3 months in control group. Log-rank test suggested that statistically significant difference exists between two groups (p=0.024). 1-, 2- and 3-year survival rates were 56.3%, 18.8% and 9.3% in study, while 30.6%, 5.6% and 0 in control group, respectively, with statistically significant difference between two groups (by Log-rank, p = 0.014). Conclusions: The treatment of TACE+PVE+HIFU sequential therapy for HCC increases response rate, prolong survival, and could thus be a safe and effective treatment for advanced cases.

Analysis of Prethrombotic States in Patients with Malignant Tumors

Cui, Lin,Sun, You-Hong,Chen, Jue,Wang, Lu,Liu, Jian-Jun,Zhou, Xiang-Rong,Ding, Jie,Liu, Xing-Xiang,Huang, Xin-En Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.13

Background: This study aimed to investigate the incidence and risk factors for a prethrombotic state in patients with malignant tumors. Materials and Methods: Plasma d-dimer (D-D) in patients with malignant tumors was measured. Abnormal rates of D-D and possible risk factors like gender, age, type of tumor, and staging of tumor were analyzed. Results: Of 1,453 patients, 629 demonstrated plasma D-D abnormality (43.3%). The D-D abnormal rate of male patients (n=851, 43.5%) was not statistically significantly different from that for female patients (n=602, 43.0%) (p>0.05). D-D abnormal rate increased with age and was statistically significant among different age groups (p<0.05). Regarding staging of tumor, D-D abnormal rate in patients with phase I was 2.0%, 6.2% in phase II, 47.6% in phase III and 83.1% in phase IV, with statistically significant differences between phase III and II, as well as phase III and IV (p<0.01). Conclusions: A prethrombotic state was closely related to malignancy of tumors. The risk factors for a prethrombotic state include age and tumor stage.

Partial CRC Checksum of SCTP for Error Control over Wireless Networks

Cui, Lin,Koh, Seok Joo Springer-Verlag 2009 Wireless personal communications Vol.48 No.2