The multifunctional integration system(MFIS)is based on a common hardware platform that controls and regulates the system’s configurable parameters through software to meet dif-ferent operational requirements.Dwell s...The multifunctional integration system(MFIS)is based on a common hardware platform that controls and regulates the system’s configurable parameters through software to meet dif-ferent operational requirements.Dwell scheduling is a key for the system to realize multifunction and maximize the resource uti-lization.In this paper,an adaptive dwell scheduling optimization model for MFIS which considers the aperture partition and joint radar communication(JRC)waveform is established.To solve the formulated optimization problem,JRC scheduling condi-tions are proposed,including time overlapping condition,beam direction condition and aperture condition.Meanwhile,an effec-tive mechanism to dynamically occupy and release the aperture resource is introduced,where the time-pointer will slide to the earliest ending time of all currently scheduled tasks so that the occupied aperture resource can be released timely.Based on them,an adaptive dwell scheduling algorithm for MFIS with aperture partition and JRC waveform is put forward.Simulation results demonstrate that the proposed algorithm has better com-prehensive scheduling performance than up-to-date algorithms in all considered metrics.展开更多
In Lebanon, as in some countries, the major financial institutions in the economy experienced by the country in the aftermath of independence were banks and insurance companies. However, the operation of these financi...In Lebanon, as in some countries, the major financial institutions in the economy experienced by the country in the aftermath of independence were banks and insurance companies. However, the operation of these financial institutions obeys to some requirements that are not often likely to allow economic agents with low purchasing power to obtain the necessary funds to finance their production activities. Microfinance therefore comes in as the beginning of seeking effective market oriented solutions to the provision of substantial and effective financial resource for poor groups of people who do not have access to financial service from formal government and private financial institution. Microfinance Institutions （MFIs） are created for a social and sometimes non-profit objective. In Lebanon, many limitations hinder the development of MFIs including the lack of regulations, economic conditions, insecurity, political conflict, financial resources, and the risk of interest rates. Microfinance in Lebanon saw the light during the 1975-1990 Civil War through programs of charitable and community organizations, and really started to develop only in the second half of the 1990s. Capping interest rates may affect the access of poor people to financial services. The problem is that the granting of very small loans involves inevitably higher administrative costs than those offered by traditional bank loans. Therefore, MFIs that seek profitability should have higher interest rates than those charged by traditional banks. By providing money to poor people, how do MFIs in Lebanon reduce the credit risk？ This theme＇s treatment requires a qualitative analysis development. Indeed, after the selection of a representative sample, semi-structured interviews were done with the MFIs managers, and several researches done on this topic were analyzed. The data obtained from the above are treated by the triangulation of different data and the interviews analysis by the method of discourse content analysis. In addition, a literature review was done through scientific journals, books, newspapers, and websites.展开更多
利用新型铁电材料Na 0.5 Y 0.5 TiO 3(NYTO)薄膜高介电的特点,将其作为MFIS(metal-ferroelectric-insulator-semiconductor,MFIS)电容器的绝缘层,制备出Pt/Pb(Zr 0.2 Ti 0.8)O 3/NYTO/Si结构电容器,并对其进行XRD、SEM、C-V特性测试及I-...利用新型铁电材料Na 0.5 Y 0.5 TiO 3(NYTO)薄膜高介电的特点,将其作为MFIS(metal-ferroelectric-insulator-semiconductor,MFIS)电容器的绝缘层,制备出Pt/Pb(Zr 0.2 Ti 0.8)O 3/NYTO/Si结构电容器,并对其进行XRD、SEM、C-V特性测试及I-V特性测试分析.分别对C-V存储窗口(记忆窗口,memory window)与应用电压以及绝缘层膜厚的关系进行了研究,结果表明记忆窗口数值比较理想.绝缘层厚度为40 nm、电容器的应用电压为32 V时,记忆窗口可达13 V.对制备的MFIS电容器I-V特性进行了研究,结果表明器件具备较低的漏电流密度,为1.08×10-6 A/cm 2,且其电流传导机制符合空间电荷限制电流导电机制.展开更多
Metal-ferroelectric-insulator-silicon(MFIS) capacitors with Bi3.15Nd0.85Ti3O12(BNT) ferroelectric thin film were simulated using a commercial software Silvaco/Atlas,and the effects of applied voltage and insulator lay...Metal-ferroelectric-insulator-silicon(MFIS) capacitors with Bi3.15Nd0.85Ti3O12(BNT) ferroelectric thin film were simulated using a commercial software Silvaco/Atlas,and the effects of applied voltage and insulator layer on capacitance-voltage(C-V) hysteresis loops and memory windows were investigated. For the MFIS capacitors with CeO2 insulator,with the increase of applied voltage from 2 V to 15 V,the C-V loops become wider and memory windows increase from 0.15 V to 1.27 V. When the thickness of CeO2 layer increases from 1 nm to 5 nm at the applied voltage of 5 V,the C-V loops become narrower and the memory windows decrease from 1.09 V to 0.36 V. For MFIS capacitors with different insulator layers(CeO2,HfO2,Y2O3,Si3N4 and SiO2),the high dielectric constants can make the C-V loops wider and improve the capacitor's memory window. The simulation results prove that Silvaco/Atlas is a powerful simulator for MFIS capacitor,and they are helpful to the fabrication of MFIS nonvolatile memory devices.展开更多
The paper presents and examines the impact of corporate governance and ethics in particular on sustainable development of the Zimbabwean microfinance sector in the period 2009-2019.The critical microfinance institutio...The paper presents and examines the impact of corporate governance and ethics in particular on sustainable development of the Zimbabwean microfinance sector in the period 2009-2019.The critical microfinance institutions(MFIs)crisis experienced in Masvingo,Zimbabwe recently was not the first one in the world in terms of its severity.The main aim of MFIs in any economy is to serve the poor and vulnerable people of a society through providing them with soft or concessional loans,insurance coverage,and facilities for savings.The study used the descriptive qualitative design to draw research data from MFIs dotted in and around Masvingo Province for presentation,analysis,and interpretation.One of the major findings of the study was that corporate governance and ethics played an indispensable role in the growth and development of MFIs’products and services.The study also realized that good corporate governance and ethical behaviours in business practices were essential for the success of any organization and vice versa and MFIs were no exception.The study therefore concluded that poor capital formation,corporate governance and ethics,human recruitment and selection procedures and fraudulent activities or misappropriation of funds were responsible for the majority of threats faced by MFIs in Masvingo in their growth and development endeavours.Therefore the study recommended that directors of MFIs should craft policies and strategies that are corporate governance and ethics oriented in their desire to grow their business towards sustainable development in the foreseeable future.展开更多
The idea of this survey on microfinance in Panama arises from the importance of this financial sector in Latin America, in particular this paper analyzes the system of microcredit and estimate, among other things, the...The idea of this survey on microfinance in Panama arises from the importance of this financial sector in Latin America, in particular this paper analyzes the system of microcredit and estimate, among other things, the financial needs of the institutions of microcredit as a potential target of international investment. The present paper aims to provide a cognitive framework on microcredit in Panama. It wants to demonstrate how this country can be an area in which international investors can operate considering that this form of credit can improve their yields especially in countries, such as Panama, characterized by high interest rates. Under the methodological point of view, the paper considers the financial variables of microcredit in Panama. In this way, it reaches the goal of the research to identify MFIs （micro finance institutions） as a potential target of investors.展开更多
The aim of this research is to extract information from married female clients who utilize financing,empowering,and other facilities provided by Microfinance Institutions(MFIs).Quantitative descriptive approach is use...The aim of this research is to extract information from married female clients who utilize financing,empowering,and other facilities provided by Microfinance Institutions(MFIs).Quantitative descriptive approach is used in order to describe MFIs.Specifically,the difference between MFIs in each area will be overviewed by using statistical instruments of testing for a difference between means and independent F-test.On the other hand,descriptive qualitative approach is used to review the social interactions of female clients.The results of this research have uncovered some facts.First,however,Difference-Between-Two-Means Test has revealed that no significant difference is found.This shows that the empowering aspect that has been done by MFIs conforms with the standard.Second,the fact that no significant difference is found in the empowering process has been backed by data that reveals relatively small loans scale,similarity in business models,unvaried necessity,relatively small expenditure and living cost,low access to education,and good accessibility to MFIs.Third,business models that are desirable by female clients have these characteristics:only requiring a minimum amount of capital;durable;fast-moving;focusing more on costumers;adaptable;contributing to the socieW's economy;flexible;having a set amount of freedom.展开更多
Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive st...Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented growth.The obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.展开更多
Designing Fischer-Tropsch synthesis(FTS)catalysts to selectively produce liquid hydrocarbon fuels is a crucial challenge.Herein,we selectively introduced Co nanoparticles(NPs)into the micropores and mesopores of an or...Designing Fischer-Tropsch synthesis(FTS)catalysts to selectively produce liquid hydrocarbon fuels is a crucial challenge.Herein,we selectively introduced Co nanoparticles(NPs)into the micropores and mesopores of an ordered mesoporous MFI zeolite(OMMZ)through impregnation,which controlled the carbon number distribution in the FTS products by tuning the position of catalytic active sites in differently sized pores.The Co precursors coordinated by acetate with a size of 9.4×4.2×2.5Åand by 2,2'-bipyridine with a size of 9.5×8.7×7.9Å,smaller and larger than the micropores(ca.5.5Å)of MFI,made the Co species incorporated in OMMZ's micropores and mesopores,respectively.The carbon number products synthesized with the Co NPs confined in mesopores were larger than that in micropores.The high jet and diesel selectivities of 66.5%and 65.3%were achieved with Co NPs confined in micropores and mesopores of less acidic Na-type OMMZ,respectively.Gasoline and jet selectivities of 76.7%and 70.8%were achieved with Co NPs confined in micropores and mesopores of H-type OMMZ with Brönsted acid sites,respectively.A series of characterizations revealed that the selective production of diesel and jet fuels was due to the C-C cleavage suppressing of heavier hydrocarbons by the Co NPs located in mesopores.展开更多
基金supported by the National Natural Science Foundation of China(6203100762371093).
文摘The multifunctional integration system(MFIS)is based on a common hardware platform that controls and regulates the system’s configurable parameters through software to meet dif-ferent operational requirements.Dwell scheduling is a key for the system to realize multifunction and maximize the resource uti-lization.In this paper,an adaptive dwell scheduling optimization model for MFIS which considers the aperture partition and joint radar communication(JRC)waveform is established.To solve the formulated optimization problem,JRC scheduling condi-tions are proposed,including time overlapping condition,beam direction condition and aperture condition.Meanwhile,an effec-tive mechanism to dynamically occupy and release the aperture resource is introduced,where the time-pointer will slide to the earliest ending time of all currently scheduled tasks so that the occupied aperture resource can be released timely.Based on them,an adaptive dwell scheduling algorithm for MFIS with aperture partition and JRC waveform is put forward.Simulation results demonstrate that the proposed algorithm has better com-prehensive scheduling performance than up-to-date algorithms in all considered metrics.
文摘In Lebanon, as in some countries, the major financial institutions in the economy experienced by the country in the aftermath of independence were banks and insurance companies. However, the operation of these financial institutions obeys to some requirements that are not often likely to allow economic agents with low purchasing power to obtain the necessary funds to finance their production activities. Microfinance therefore comes in as the beginning of seeking effective market oriented solutions to the provision of substantial and effective financial resource for poor groups of people who do not have access to financial service from formal government and private financial institution. Microfinance Institutions （MFIs） are created for a social and sometimes non-profit objective. In Lebanon, many limitations hinder the development of MFIs including the lack of regulations, economic conditions, insecurity, political conflict, financial resources, and the risk of interest rates. Microfinance in Lebanon saw the light during the 1975-1990 Civil War through programs of charitable and community organizations, and really started to develop only in the second half of the 1990s. Capping interest rates may affect the access of poor people to financial services. The problem is that the granting of very small loans involves inevitably higher administrative costs than those offered by traditional bank loans. Therefore, MFIs that seek profitability should have higher interest rates than those charged by traditional banks. By providing money to poor people, how do MFIs in Lebanon reduce the credit risk？ This theme＇s treatment requires a qualitative analysis development. Indeed, after the selection of a representative sample, semi-structured interviews were done with the MFIs managers, and several researches done on this topic were analyzed. The data obtained from the above are treated by the triangulation of different data and the interviews analysis by the method of discourse content analysis. In addition, a literature review was done through scientific journals, books, newspapers, and websites.
基金Projects (10472099,0672139) supported by the National Natural Science Foundation of ChinaProject (207079) supported by Key Project of Ministry of Education of China+1 种基金Project (05FJ2005) supported by Key Project of Scientific and Technological Department of Hunan ProvinceProject(06A072) supported by Key Project of Education Department of Hunan Province
文摘Metal-ferroelectric-insulator-silicon(MFIS) capacitors with Bi3.15Nd0.85Ti3O12(BNT) ferroelectric thin film were simulated using a commercial software Silvaco/Atlas,and the effects of applied voltage and insulator layer on capacitance-voltage(C-V) hysteresis loops and memory windows were investigated. For the MFIS capacitors with CeO2 insulator,with the increase of applied voltage from 2 V to 15 V,the C-V loops become wider and memory windows increase from 0.15 V to 1.27 V. When the thickness of CeO2 layer increases from 1 nm to 5 nm at the applied voltage of 5 V,the C-V loops become narrower and the memory windows decrease from 1.09 V to 0.36 V. For MFIS capacitors with different insulator layers(CeO2,HfO2,Y2O3,Si3N4 and SiO2),the high dielectric constants can make the C-V loops wider and improve the capacitor's memory window. The simulation results prove that Silvaco/Atlas is a powerful simulator for MFIS capacitor,and they are helpful to the fabrication of MFIS nonvolatile memory devices.
文摘The paper presents and examines the impact of corporate governance and ethics in particular on sustainable development of the Zimbabwean microfinance sector in the period 2009-2019.The critical microfinance institutions(MFIs)crisis experienced in Masvingo,Zimbabwe recently was not the first one in the world in terms of its severity.The main aim of MFIs in any economy is to serve the poor and vulnerable people of a society through providing them with soft or concessional loans,insurance coverage,and facilities for savings.The study used the descriptive qualitative design to draw research data from MFIs dotted in and around Masvingo Province for presentation,analysis,and interpretation.One of the major findings of the study was that corporate governance and ethics played an indispensable role in the growth and development of MFIs’products and services.The study also realized that good corporate governance and ethical behaviours in business practices were essential for the success of any organization and vice versa and MFIs were no exception.The study therefore concluded that poor capital formation,corporate governance and ethics,human recruitment and selection procedures and fraudulent activities or misappropriation of funds were responsible for the majority of threats faced by MFIs in Masvingo in their growth and development endeavours.Therefore the study recommended that directors of MFIs should craft policies and strategies that are corporate governance and ethics oriented in their desire to grow their business towards sustainable development in the foreseeable future.
文摘The idea of this survey on microfinance in Panama arises from the importance of this financial sector in Latin America, in particular this paper analyzes the system of microcredit and estimate, among other things, the financial needs of the institutions of microcredit as a potential target of international investment. The present paper aims to provide a cognitive framework on microcredit in Panama. It wants to demonstrate how this country can be an area in which international investors can operate considering that this form of credit can improve their yields especially in countries, such as Panama, characterized by high interest rates. Under the methodological point of view, the paper considers the financial variables of microcredit in Panama. In this way, it reaches the goal of the research to identify MFIs （micro finance institutions） as a potential target of investors.
文摘The aim of this research is to extract information from married female clients who utilize financing,empowering,and other facilities provided by Microfinance Institutions(MFIs).Quantitative descriptive approach is used in order to describe MFIs.Specifically,the difference between MFIs in each area will be overviewed by using statistical instruments of testing for a difference between means and independent F-test.On the other hand,descriptive qualitative approach is used to review the social interactions of female clients.The results of this research have uncovered some facts.First,however,Difference-Between-Two-Means Test has revealed that no significant difference is found.This shows that the empowering aspect that has been done by MFIs conforms with the standard.Second,the fact that no significant difference is found in the empowering process has been backed by data that reveals relatively small loans scale,similarity in business models,unvaried necessity,relatively small expenditure and living cost,low access to education,and good accessibility to MFIs.Third,business models that are desirable by female clients have these characteristics:only requiring a minimum amount of capital;durable;fast-moving;focusing more on costumers;adaptable;contributing to the socieW's economy;flexible;having a set amount of freedom.
基金supported by the National Natural Science Foundation of China(62174059,51872099,and 91963102)Hong Kong Research Grant Council(15300619)+3 种基金Science and Technology Program of Guangzhou(201905-0001)Guangdong Science and Technology ProjectInternational Cooperation(2021A0505030064)the Program for Chang Jiang Scholars and Innovative Research Teams in Universities(IRT_17R40)the 111 Project。
基金Joint Project of Dalian University of Technology-Dalian Institute of Chemical Physics (HX20230236)。
文摘Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented growth.The obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.
文摘Designing Fischer-Tropsch synthesis(FTS)catalysts to selectively produce liquid hydrocarbon fuels is a crucial challenge.Herein,we selectively introduced Co nanoparticles(NPs)into the micropores and mesopores of an ordered mesoporous MFI zeolite(OMMZ)through impregnation,which controlled the carbon number distribution in the FTS products by tuning the position of catalytic active sites in differently sized pores.The Co precursors coordinated by acetate with a size of 9.4×4.2×2.5Åand by 2,2'-bipyridine with a size of 9.5×8.7×7.9Å,smaller and larger than the micropores(ca.5.5Å)of MFI,made the Co species incorporated in OMMZ's micropores and mesopores,respectively.The carbon number products synthesized with the Co NPs confined in mesopores were larger than that in micropores.The high jet and diesel selectivities of 66.5%and 65.3%were achieved with Co NPs confined in micropores and mesopores of less acidic Na-type OMMZ,respectively.Gasoline and jet selectivities of 76.7%and 70.8%were achieved with Co NPs confined in micropores and mesopores of H-type OMMZ with Brönsted acid sites,respectively.A series of characterizations revealed that the selective production of diesel and jet fuels was due to the C-C cleavage suppressing of heavier hydrocarbons by the Co NPs located in mesopores.
