To solve the problem of inaccurate angle adjustment in the self-assembly process, a new homogenous hybrid modular self-reconfigurable robot-Xmobot is designed. Each module has four rotary joints and a self-turning mec...To solve the problem of inaccurate angle adjustment in the self-assembly process, a new homogenous hybrid modular self-reconfigurable robot-Xmobot is designed. Each module has four rotary joints and a self-turning mechanism. With the proposed self-turning mechanism, the angle adjusting accuracy of the module is increased to 2°, and the relative position adjusting efficiency of the module in the self-assembly process is also improved. The measured maximum moving distance of the proposed module in a gait cycle is 11.0 cm. Aiming at the multiple degree of freedom （MDOF） feature of the proposed module, a motion controller based on the central pattern generator （CPG） is proposed. The control of five joints of the module only requires two CPG oscillators. The CPG-based motion controller has three basic output modes, i. e. the oscillation, the rotation, and the fixed modes. The serpentine and the wheeled movements of the H-shaped robot are simulated, respectively. The results show that the average velocities of the two movements are 15. 2 and 20. 1 m/min, respectively. The proposed CPG-based motion controller is evaluated to be effective.展开更多
Accounting information has gained utmost importance over the years, and it now plays a vital role in our society. Indeed, the trends of a global economy, especially one relying on a capital market-based financial syst...Accounting information has gained utmost importance over the years, and it now plays a vital role in our society. Indeed, the trends of a global economy, especially one relying on a capital market-based financial system, are greatly influenced by reliable accounting information. However, it is sometimes difficult to assess the ＂reliability＂ of such information, given the clear differences in the needs and goals of its different users. In this respect, the possible ways to guarantee the appropriateness of the accounting information provided to users doubtlessly deserve a careful investigation. The second half of the 1970s can be considered as the starting point of a debate, within the Anglo-Saxon accounting literature, concerning the most effective methods to provide users with accounting data effectively meeting their very specific needs. In this context, two antithetical schools of thought developed： （1） free market approach; and （2） regulatory approach. Although it is possible to state that accounting regulation has now become a concrete reality both inside and outside the Anglo-Saxon accounting context, after more than halfa century, its efficacy is still an open issue.展开更多
The circular economy is an advocate of harmony with the Earth＇ s natural resources and environment, mutual interdependence of social and economic development model, it requires economic production systems within and ...The circular economy is an advocate of harmony with the Earth＇ s natural resources and environment, mutual interdependence of social and economic development model, it requires economic production systems within and between different production departments and interconnected way matter and energy exchange and transfer, to achieve maximum utilization of material and energy into the system, resulting in ＂two low and one high＂ approach to development in harmony with the natural environment. And it has become a mainstream trend since the 1990s and social development of the countries in the world One.展开更多
A new passive method for automatic dis-covery and bcation of network failure is proposed. This method employs a passive measurement to collect infonmtion and events from network traffic, and em-ploys a rrodel-based re...A new passive method for automatic dis-covery and bcation of network failure is proposed. This method employs a passive measurement to collect infonmtion and events from network traffic, and em-ploys a rrodel-based reasoning system to detect and locate network faults. Measurement points are de-ployed in a backbone network to capture the traffic and then evaluate the Quality of Service （QoS） metrics of end-to-end IP conversations. A muting rrodel is al-so established for the observed network to simulate the attributes and activities of reuters and links. This muting model also deduces the muting path for each IP conversation, and thus the QoS metrics of IP con-versations are mapped into the metrics of paths. With the inforrmtion of shared links of overlapping paths and network torrography technique, the QoS metrics of links can also be estimated, and the poorly rated links are picked out as failure points. This method is imple-mented in a tool named FaultMan, which is deployed in a campus network. Test results have shown its availa-bility in rriddle-scale networks.展开更多
In keeping with the need for skills development and increased demand by business for more robust systems to develop staff, innovative ways for the development of human capital would need to be found. The current role ...In keeping with the need for skills development and increased demand by business for more robust systems to develop staff, innovative ways for the development of human capital would need to be found. The current role of workplace learning would need to align to job and qualification requirements. Organisations would need to explore the development of Corporate Qualifications Frameworks to quantity skills needs. In the process, attention has to be paid to creat contextual awareness as well as a sense of purpose for learners. In essence, an integrated educational model that should be more flexible, more adaptable, and more effective, serving the needs of society at large should be considered. Care should be taken to build frameworks and models that address both the productive needs of organisations, whilst at the same time, ensuring the engagement of individuals. These frameworks should entice the employee to participate in a self-development process that benifits the organisation. Corporates should address the aspirations of individuals and plan more rewarding careers for staff. Employees should have a clear path for development and growth. Through collective effort, all particpants would benefit.展开更多
This paper presents an innovative switched-mode auto gain control （AGC） circuit with internally created reset module for DC-10Mb/s burst-mode unbalanced （BMU） optical data transmission. Conventional AGC circuit is...This paper presents an innovative switched-mode auto gain control （AGC） circuit with internally created reset module for DC-10Mb/s burst-mode unbalanced （BMU） optical data transmission. Conventional AGC circuit is inappropriate for BMU data transmission because it is based on average level detection and requires considerable time to settle on a predefined gain. Therefore, we adopt a fast switched-mode AGC based on peak level detection. After the gain is adjusted, the peak level detectors need to re-detect the peak level of the input signal. Thus, we develop an internally created reset module. This AGC with reset module exhibits a fast operation and achieves an adjusted stable gain within one-bit, avoiding any bit loss up to 10Mb/s data rate. During power-up, the peak level detectors possibly hold an uncertain level resulting in the bit-errors. We propose a power-up reset circuit to solve this problem. Designed in a 0.5μm CMOS technology, the circuit achieves an optical sensitivity of better than -30dBm and a wide dynamic range of over 30dB with a power dissipation of only 30 mW from a 5V supply.展开更多
Bodies of plants are modularly organized. Development proceeds by adding new modules to open endings with a potential for branching. Each module is autonomous to some extent. Development relies on the self-organized p...Bodies of plants are modularly organized. Development proceeds by adding new modules to open endings with a potential for branching. Each module is autonomous to some extent. Development relies on the self-organized patterns that emerge from the interactions of individual modules. Interactions include both competition and cooperation,and several types of positive and negative feedback loops are involved. Development can be open to external influences, thus enabling the plant to adjust its form to the environment,for example, to the spatial distribution of ecological resources. This paper provides a review on adaptive plasticity in plants.展开更多
基金The National Natural Science Foundation of China(No.61375076)Research&Innovation Program for Graduate Student in Universities of Jiangsu Province(No.CXLX13-085)the Scientific Research Foundation of Graduate School of Southeast University(No.YBJJ1350)
文摘To solve the problem of inaccurate angle adjustment in the self-assembly process, a new homogenous hybrid modular self-reconfigurable robot-Xmobot is designed. Each module has four rotary joints and a self-turning mechanism. With the proposed self-turning mechanism, the angle adjusting accuracy of the module is increased to 2°, and the relative position adjusting efficiency of the module in the self-assembly process is also improved. The measured maximum moving distance of the proposed module in a gait cycle is 11.0 cm. Aiming at the multiple degree of freedom （MDOF） feature of the proposed module, a motion controller based on the central pattern generator （CPG） is proposed. The control of five joints of the module only requires two CPG oscillators. The CPG-based motion controller has three basic output modes, i. e. the oscillation, the rotation, and the fixed modes. The serpentine and the wheeled movements of the H-shaped robot are simulated, respectively. The results show that the average velocities of the two movements are 15. 2 and 20. 1 m/min, respectively. The proposed CPG-based motion controller is evaluated to be effective.
文摘Accounting information has gained utmost importance over the years, and it now plays a vital role in our society. Indeed, the trends of a global economy, especially one relying on a capital market-based financial system, are greatly influenced by reliable accounting information. However, it is sometimes difficult to assess the ＂reliability＂ of such information, given the clear differences in the needs and goals of its different users. In this respect, the possible ways to guarantee the appropriateness of the accounting information provided to users doubtlessly deserve a careful investigation. The second half of the 1970s can be considered as the starting point of a debate, within the Anglo-Saxon accounting literature, concerning the most effective methods to provide users with accounting data effectively meeting their very specific needs. In this context, two antithetical schools of thought developed： （1） free market approach; and （2） regulatory approach. Although it is possible to state that accounting regulation has now become a concrete reality both inside and outside the Anglo-Saxon accounting context, after more than halfa century, its efficacy is still an open issue.
文摘The circular economy is an advocate of harmony with the Earth＇ s natural resources and environment, mutual interdependence of social and economic development model, it requires economic production systems within and between different production departments and interconnected way matter and energy exchange and transfer, to achieve maximum utilization of material and energy into the system, resulting in ＂two low and one high＂ approach to development in harmony with the natural environment. And it has become a mainstream trend since the 1990s and social development of the countries in the world One.
基金supported by the National Basic Research Program under Grant No. G1999032707the National High Technology Research and Development Program of China under Grant No. 2008AA01A303the Supporting Program of the"Eleventh Five-year Plan"for Sci & Tech Research of China under Grant No. 2008BAH37B03
文摘A new passive method for automatic dis-covery and bcation of network failure is proposed. This method employs a passive measurement to collect infonmtion and events from network traffic, and em-ploys a rrodel-based reasoning system to detect and locate network faults. Measurement points are de-ployed in a backbone network to capture the traffic and then evaluate the Quality of Service （QoS） metrics of end-to-end IP conversations. A muting rrodel is al-so established for the observed network to simulate the attributes and activities of reuters and links. This muting model also deduces the muting path for each IP conversation, and thus the QoS metrics of IP con-versations are mapped into the metrics of paths. With the inforrmtion of shared links of overlapping paths and network torrography technique, the QoS metrics of links can also be estimated, and the poorly rated links are picked out as failure points. This method is imple-mented in a tool named FaultMan, which is deployed in a campus network. Test results have shown its availa-bility in rriddle-scale networks.
文摘In keeping with the need for skills development and increased demand by business for more robust systems to develop staff, innovative ways for the development of human capital would need to be found. The current role of workplace learning would need to align to job and qualification requirements. Organisations would need to explore the development of Corporate Qualifications Frameworks to quantity skills needs. In the process, attention has to be paid to creat contextual awareness as well as a sense of purpose for learners. In essence, an integrated educational model that should be more flexible, more adaptable, and more effective, serving the needs of society at large should be considered. Care should be taken to build frameworks and models that address both the productive needs of organisations, whilst at the same time, ensuring the engagement of individuals. These frameworks should entice the employee to participate in a self-development process that benifits the organisation. Corporates should address the aspirations of individuals and plan more rewarding careers for staff. Employees should have a clear path for development and growth. Through collective effort, all particpants would benefit.
基金Supported by the Natural Science Foundation of Jiangsu Province （ BK2010411 ） and the National International Cooperation Project of China-Korea （2011DFA11310）.
文摘This paper presents an innovative switched-mode auto gain control （AGC） circuit with internally created reset module for DC-10Mb/s burst-mode unbalanced （BMU） optical data transmission. Conventional AGC circuit is inappropriate for BMU data transmission because it is based on average level detection and requires considerable time to settle on a predefined gain. Therefore, we adopt a fast switched-mode AGC based on peak level detection. After the gain is adjusted, the peak level detectors need to re-detect the peak level of the input signal. Thus, we develop an internally created reset module. This AGC with reset module exhibits a fast operation and achieves an adjusted stable gain within one-bit, avoiding any bit loss up to 10Mb/s data rate. During power-up, the peak level detectors possibly hold an uncertain level resulting in the bit-errors. We propose a power-up reset circuit to solve this problem. Designed in a 0.5μm CMOS technology, the circuit achieves an optical sensitivity of better than -30dBm and a wide dynamic range of over 30dB with a power dissipation of only 30 mW from a 5V supply.
基金This research was subsidized by the Hungarian National Research Fund(OTKA T35009,and NWOOTKA N34028),the Hungarian Ministry of Education(FKFP 0187/1990,Istvn Szchenyi Scolarship),and the International Program of the Santa Fe Institute,NM,USA.
文摘Bodies of plants are modularly organized. Development proceeds by adding new modules to open endings with a potential for branching. Each module is autonomous to some extent. Development relies on the self-organized patterns that emerge from the interactions of individual modules. Interactions include both competition and cooperation,and several types of positive and negative feedback loops are involved. Development can be open to external influences, thus enabling the plant to adjust its form to the environment,for example, to the spatial distribution of ecological resources. This paper provides a review on adaptive plasticity in plants.
