检索结果-南通市图书馆

ARIMA With GARCH Family Modeling and Projection on Share Volume of DSE

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Economics World 2015年第4期3卷 171-184页

作者： ahammad hossain Md. Kamruzzaman Md. Ayub Ali Varendra University Rajshahi Bangladesh University ofRajshahi Rajshahi Bangladesh

A suitable statistical model has been explored for the investors as well as the researchers to resolve the future estimation of share volume by using daily stock volume data from Dhaka Stock Exchange （DSE）. The daily volume data from the June 1, 2004 to April 19, 2010 were retrieved from DSE website as a secondary data source. The Maximum Likelihood---Autoregressive Conditional Heteroskedasticity （ARCH）（Marquardt） method has been applied to construct the models for the stock volume data of DSE by using statistical package software E-Views of verson-5. First of all, an ＂Auto Regressive Integrated Moving Average （ARIMA） model＂ was fitted and observed that heteroscedastic volatilities were still present there. To eliminate this dilemma, ARCH class of volatility models has been used and finally the ARIMA with EGARCH model has been explored. Findings of this study have recognized that ARIMA with EGARCH model implies low mean square error, low mean absolute error, low bias proportion, and low variance proportion for share volume data with comparing to other models. Hence, the modelling concept established in this study would be a decisive study for the investors as well as the researchers.

关键词： ARIMA Generalized ARCH (GARCH) family models stock volume projection strategy

Econometric Investigation of DSE＇s Portfolios through Selective Micro and Macro Economic Indicators

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Statistical Science and Application 2016年第3期4卷 144-153页

作者： ahammad hossain Md. Kamruzzaman Md. Ayub Ali PhD Fellow Institute of Bangladesh Studies University of Rajshahi Bangladesh. Associate Professor Institute of Bangladesh Studies University of Rajshahi Bangladesh. Professor Department of Statistics University of Rajshahi Bangladesh.

This paper examines the impact of the portfolios of Dhaka Stock Exchange （DSE） with corresponding to the selective macro and micro economic indicators of Bangladesh. The microeconomic indicators are Invested Market Capital （1MC）（US$） and the number of Total Enlisted Company （TEC） which have direct and immediate impact on the Stock Turnover Ratio （STR） of DSE and the macroeconomic indicators are Gross Domestic Product （GDP）, Gross National Income （GNI）, Gross Saving （GS）, Gross Inflation （GI）, Deposit Interest Rate （DIR）, and Gross Foreign Investment （GFI） which have indirect and long run impact on DSE portfolios. To investigate the direct impact on DSE＇s turnover ratio, the Cobb-Douglas production function is applied and to investigate the indirect and long run impact, multiple linear regression models are also applied. The estimated results are diagnosed using magnitudes of derivatives, gradient and Wald＇s coefficient restriction with respect to the macro and micro economic indicators.

关键词： Direct and immediate impact Indirect and long run impact magnitudes of derivatives gradient andWald's coefficient restriction

Governance of forest conservation and co-benefits for Bangladesh under changing climate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2014年第1期25卷 29-36页

作者： Ronju ahammad Mohammed Kamal hossain Panna Husnain Community Based Adaptation to Climate Change through Coastal Afforestation Project Bhan Bhaban Agargaon Dhaka-1207 Bangladesh. Institute of Forestry & Environmental Sciences University of Chittagong Bangladesh. Urban Planner Solaiman Nagar Minara Maszid Road Khulna Bangladesh.

We focused on key aspects of forest governance for biodiver- sity conservation in implementing new climate change policies. The national forest institutions must be adaptive to identify the existing pitfalls of prior conservation policies to take advantage of new climate change policies. Strengthening roles and technical capacity of national institutions for systematic biodiversity monitoring and carbon stock assessment is required in developing and least developed countries. Community participation needs careful analysis to ensure equitable ac- cess of particular social groups to local decision-making processes and to sustain optional livelihoods. The livelihood options around forest reserves or protected areas must be taken into account to enhance forest-based adaptation.

关键词： REDD+ (Reducing Emissions from Deforestation and Forest Degradation in Developing Countries) conservation institution livelihood protected areas

A Novel LSB Steganography Technique for Enhancing Cloud Security

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Information Security 2024年第3期15卷 355-377页

作者： Ahsan Ullah Md. Inzamul Haque Md. Mokarom hossain Md. Sadman ahammad Mst. Nishita Aktar Department of Computer Science and Engineering World University of Bangladesh Dhaka Bangladesh

Steganography is a technique that is frequently used to hide hidden information in multimedia artifacts including music, video, and images. In order to protect data saved in the cloud, this paper presents a steganography method for encrypting sound utilizing LSB-based computation. By using the least significant bit (LSB) of a byte to represent a message and then substituting each LSB bit with a binary message and encrypting a significant quantity of data. The proposed system uses the LSB technique of picture steganography, Multi-Level Encryption Algorithm (MLEA) and Two-Level Encryption Algorithm (TLEA) data encryption to give the highest level of cloud security. Compared to other current schemes, the performance of the suggested method is 1.732125% better on average.

关键词： Steganography LSB Cloud Computing Security Cryptography TLEA MLEA

A Regular Study on Yarn Count, Size Box Temperature and Machine Speed to Increase Weaving Efficiency of Cotton Fabric

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Textile Science and Technology 2020年第4期6卷 168-176页

作者： Umme Magreba Takebira A. T. M. Mohibullah Md. Zawadul hossain Shajidul Islam Tanim Md. Sharif ahammad Redoy Md. Lutfar Rahman Md. Shakib Rejwan Department of Apparel Manufacturing & Technology BGMEA University of Fashion & Technology Dhaka Bangladesh

Sizing is an inherent part of weaving works, consisting in the coating of the warp yarn with a polymeric adhesive, such as starch, in order to assist efficient weaving. The study is aimed to assess the effects of squeezed roller pressure, dryer temperature, yarn count, machine speed (rpm) on cotton fabric weaving. Coarser and finer cotton yarn samples were prepared using sizing solution BENSIZE 850. Different size box temperature, yarn count, fabric construction, machine speed, squeeze roller pressure were considered to construct different weaving designs to study yarn breakages parameter. A warping plan was designed on TAROKO V5.4 (190325) software. The results established that size box lower temperature and higher machine speed provide the smallest amount yarn break during weaving for coarser cotton yarn and the highest for finer cotton yarn. Size box higher temperature and lower machine speed provide maximum yarn breakage during weaving coarser cotton yarn and minimum for fine yarn. Size penetration is uniform, which provides a higher strength of the yarn to less breakage. This aspect of the research suggested that higher yarn strength gives a lesser amount of breakage.

关键词： Sizing Material Machine Parameters Different Counts Sizing Efficiency