Analysis ofn Causes of the American Subprime Mortgage Based on Managing Credit Risk

Hong Mei 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.10

The mess caused by fast-and loose subprime lending in the U.S. has now blown into a perilous global crisis of credit that has revealed both the scale and the limitation of globalization. Finance is built on trust, and suddenly that trust has been replaced by fear. This will be altogether more testing for the American economy as well as the world"s economies. After this new "prosperity-decline" cycle in the real estate, mortgage and mortgage securities market. The paper systematically summarizes the causes of SMC, and then tries to figure out the relationship between the causes in those different markets. The answer lies in a toxic combination of failures in credit risk management and regulatory oversight, as well as skewed incentives.

Network Intrusion Detection Model based on Combination of Fisher Score and ELM Approach

Hong Mei,Wang Ju,Qi Yao Wu,Zhai Ning 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.11

The diversity and concealment of network attack lead to the difficulty of network intrusion detection, in order to further improve the detection accuracy and efficiency of network intrusion detection, this article proposes a novel model FS-ELM, which is based on the combination of Fisher Score (FS) for feature selection and ELM classifiers for network intrusion detection. In the proposed model, FS is used to conduct feature selection to select the most distinguished feature subsets, and then to get diverse training subsets, in terms of these subsets, ELM classifiers are trained. Finally the results are achieved. Experiment on KDD CUP 99 data set, by means of the experimental analysis and comparison with SVM, LS-SVM and KNN, the proposed model not only improves the detection accuracy, but also enhances detection efficiency, it proves that it is an effective model for network intrusion detection.

School Consolidation: Whither China’s Rural Education?

Hong Mei,Quanbao Jiang,Yuanyuan Xiang,Xiaoping Song 한국사회복지학회 2015 Asian Social Work and Policy Review Vol.9 No.2

The School Consolidation Policy in the 1990s significantly impacted Chinese rural compulsory education and Chinese rural communities. Although this policy has been involved in many negative news reports, there is a lack of scientific research on it. To address the research gap, this paper first delineates the evolution of this policy, which was formed to balance the disparity between urban and rural education, accelerated by rural financial reformation and aborted due to various emerging problems. It then discusses the educational problems caused by the policy including misallocated resources, poor quality, rising costs, student safety issues, high dropout rate, and lost rural culture heritage. Through the analyses, this paper provides a clear picture of the development of Chinese rural education, and offers implications for improving educational policy, promoting educational quality, and securing educational rights of students in rural China.

Effects of Thermotherapy on Th1/Th2 Cells in Esophageal Cancer Patients Treated with Radiotherapy

Hong, Mei,Jiang, Zao,Zhou, Ying-Feng Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.5

Background: To investigate the effects of double radiofrequency hyperthermia on Th1/Th2 cells in esophageal cancer patients treated with radiotherapy. Materials and Methods: 22 patients with esophageal cancer were divided into a radiotherapy group (10 cases) and a combined group (double radiofrequency hyperthermia combined with radiotherapy group, 12 cases). Both groups received conventional radiotherapy using a cobalt-60 therapy apparatus (TD60-66Gy/30-33F). Patients in the combined group also underwent double radiofrequency hyperthermia (2F/W, 8-10F). Before and after treatment, Th1, Th2, Tc1 and Tc2 cells in peripheral blood were determined with flow cytometry. Results: In the radiotherapy group, Th1 cell contents before and after radiotherapy were $17.5{\pm}5.26%$ and $9.69{\pm}4.86%$, respectively, with a significant difference (p<0.01). The Th1/Th2 ratio was significantly decreased from $28.2{\pm}14.3$ to $16.5{\pm}10.4 $(p<0.01). In the combined group, Th1 cell content before radiotherapy was $15.9{\pm}8.18%$, and it increased to $18.6{\pm}8.84$ after radiotherapy (p>0.05), the Th1/Th2 ratio decreasing from $38.4{\pm}36.3$ to $28.1{\pm}24.0$ (p>0.05). Changes in Th2, Tc1 and Tc2 cell levels were not significant in the two groups before and after therapy (p>0.05). Conclusions: Double radiofrequency hyperthermia can promote the conversion from Th2 to Th1 cells, and regulate the balance of Th1/Th2 cells.

A Study of Bangladesh’s Maritime Strategy Options and Its Development Prospects

He hongmei(hongmei He) 아시아사회과학학회 2023 Jornal of Asia Social Science Vol.10 No.1

The Bay of Bengal, the largest bay in the world, is of strategic importance to the littoral countries including Bangladesh, India, Myanmar, Sri Lanka and Thailand. With 118,000 square kilometres of territorial waters, a 200 nautical mile exclusive economic zone and a portion of the continental shelf, following the successful resolution of maritime boundary disputes with its neighbours, Bangladesh has an excellent new opportunity to make full use of the sea and its resources. Bangladesh has placed a high priority on the Blue Economy in its maritime strategy in recent years, with an emphasis on driving the country's blue economic growth and achieving sustainable development goals. The vast potential for commerce and trade, tourism, biotechnology, pharmaceuticals, and access to deep-water ports is an opportunity to develop Blue Economy. In view of its interests in the vast maritime areas of the Bay of Bengal, an in-depth understanding of Bangladesh's maritime strategy would be useful to gauge the overall strategic situation in the Bay of Bengal in a timely and effective manner.

Evaluating Construction Cost of Green Building Based on Life-cycle Cost Analysis : An empirical analysis from Nanjing, China

Hongmei Liu 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.12

With the economic development, energy consumption is increasingly serious, land resources becoming scarcer and scarcer. Green building can effectively solve the problem of resource shortage; however, the development of green buildings in China is very slow because of its higher cost, compared with conventional buildings.. In this paper, we analyze the construction cost of green building based on life-cycle cost method, and try to find out the key factors that affect the cost. Through the empirical analysis, the results prove that there are six main factors that influence the cost of green building, such as green building technology, policy support, project positioning, construction technology, building materials prices and local conditions. On this basis, we put forward relevant policy suggestions.

Topics of English Sentences in Expository and Narrative Proses

( Hongmei Wu ),( Nirada Chitrakara ) 범태평양 응용언어학회 2020 범태평양응용언어학회지 Vol.24 No.2

Due to the fact that both the subject and the topic can occupy the initial position of the sentence, English subject is always deemed as the UNMARKED TOPIC (Lambrecht, 1994), while the topic is not always the subject. In accordance with Rizzi’s (1997) topicalization, both the subject and the topicalized constituents can be topics. Many other languages are found to have multiple topics (Erteschik-Shir, 2007). This study agrees that more than one topic is possible in English. With respect to the order, it finds that the principle of end-weight, applies only to the DP subject topics, but not other preposed constituents. The preverbal constituents in the data abide by the topic-comment structure in general. Via the authentic data, we find that the subject topic is prominently DPs. Non-subject topics are PPs, CPs, adverbs, AdvPs, and DPs, among which PPs are prominent in expository texts while CPs are prevailing in narrative proses. The frequent appearance of the PPs is found to be the genre-effect that PPs are compact structures often used as the sentence opener to make the discourse coherent in expository texts. Meanwhile, the conspicuous occurrence of the CPs, inter alia, the control constructions, is due to the characteristics of the chronological linkage in narrative proses.

Effects of Light Intensity on Components and Topographical Structures of Extracellular Polysaccharides from the Cyanobacteria Nostoc sp.

Hongmei Ge,Ling Xia,Xuping Zhou,Delu Zhang,Chunxiang Hu 한국미생물학회 2014 The journal of microbiology Vol.52 No.2

A study on the effects of light intensity (40 and 80 μE/m2/sec)on the components and topographical structures of extracellularpolysaccharides (EPS) was carried out in cyanobacteriaNostoc sp.. EPS yield increased with light intensity. However, light intensity did not significantly affect the EPSfractions and monosaccharide composition. Higher lightintensity generally resulted in higher protein content of EPSin similar fractions. The topographical structure of EPS, investigatedby atomic force microscopy, appeared as sphericallumps, chains and networks. The long chains were observedat higher light intensity. Thus, light intensity affected theyield and nature of EPS.

Enantioseparation and Determination of Sibutramine in Pharmaceutical Formulations by Capillary Electrophoresis

Hongmei Zhu,Enqi Wu,Jianbo Chen,Chuvan Men,장유선,Wonku Kang,Jung Kap Choi,이원재,강종성 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.6

Sibutramine enantiomers were separated successfully by capillary zone electrophoresis using substituted cyclodextrins as chiral selectors. The effects of cyclodextrin concentration, pH, voltage, buffer type, and electrolyte concentration on the migration time and resolution of enantiomers were examined. Separation of sibutramine enantiomers on an unmodified fused silica capillary (total length, 54 cm; effective length, 45 cm) was achieved using a mixed buffer of 20 mM phosphate/10 mM citrate containing either 5 mM methyl-β-cyclodextrin (pH 4.3) or 5 mM carboxymethyl-β-cyclodextrin (pH 6.5). Samples were injected with a pressure of 50 mbar for 5 s and were detected at a wavelength of 223 nm. The established method showed good precision and accuracy, with intra- and inter-day variations of less than 2.9 and 4.7%, respectively, and recoveries of 95.7 - 103.8%. The stability constants of (R)- and (S)-sibutramine demonstrated that the resolution of sibutramine enantiomers was attributable primarily to the difference in stability constants. When this optimized method was applied to the determination of sibutramine enantiomers in commercial drug formulations, it proved to be economical and convenient, affording sufficient accuracy, precision, and reproducibility as well as sensitivity and selectivity.

On a class of Finsler metrics with isotropic Berwald curvature

Hongmei Zhu 대한수학회 2017 대한수학회보 Vol.54 No.2

In this paper, we study a class of Finsler metrics called general $\ab$-metrics, which are defined by a Riemannian metric $\a$ and a $1$-form $\b$. We show that every general $\ab$-metric with isotropic Berwald curvature is either a Berwald metric or a Randers metric. Moreover, a lot of new isotropic Berwald general $\ab$-metrics are constructed explicitly.