Rotating bed can be used in desorption operation of biogas upgrading as a new technology. For enough time to desorb, it is important to study the relationship between the residence time of liquid in rotating bed and t...Rotating bed can be used in desorption operation of biogas upgrading as a new technology. For enough time to desorb, it is important to study the relationship between the residence time of liquid in rotating bed and the material diffusion time of liquid droplet in desorption process. By theoretical deduction, the exponential relation between residence time and liquid flow rate and rotational speed and kinematic viscosity is obtained. By analyzing the solution of nonlinear partial differential equation, the time law of material diffusion in the droplet is obtained. Moreover, by comparing the residence and diffusion times, the diffusion time can be within or out of residence time range, which has a direct relationship to rotational speed and liquid flow. By experiment, the comparison between residence and diffusion times is more realistic when the rotational speed is higher.展开更多
The right ventricular pacing （RVP） is the standard treat- ment for patients with severe bradyarrhythmias; however, it may cause and exacerbate heart failure symptoms in a long run under some circumstances.{1] In fac...The right ventricular pacing （RVP） is the standard treat- ment for patients with severe bradyarrhythmias; however, it may cause and exacerbate heart failure symptoms in a long run under some circumstances.{1] In fact, significant left ventricular （LV） systolic dysfimction and symptomatic heart failure （HF） is commonly found in patient population with pacemaker implantations.展开更多
Recently, with the migration of wealthy Chinese elites becoming increasingly prevalent, the market has come to believe that firms with controlling persons with foreign residency rights have serious agency problems. We...Recently, with the migration of wealthy Chinese elites becoming increasingly prevalent, the market has come to believe that firms with controlling persons with foreign residency rights have serious agency problems. We study the impact of controlling persons with foreign residency rights on corporate audit perspective. We find that firms whose controlling persons have foreign residency rights are more likely to use high-quality auditing services, and that this behavior is more obvious in regions with lower marketization and in firms with higher separation of ownership and control. We further study the effect of firms whose controlling persons have foreign residency rights that use high-quality Big 4 auditors and find that such firms have better corporate governance and accounting performance.展开更多
基金Supported by the Special Scientific Research Fund of Agricultural Public Welfare Profession of China(201303099)
文摘Rotating bed can be used in desorption operation of biogas upgrading as a new technology. For enough time to desorb, it is important to study the relationship between the residence time of liquid in rotating bed and the material diffusion time of liquid droplet in desorption process. By theoretical deduction, the exponential relation between residence time and liquid flow rate and rotational speed and kinematic viscosity is obtained. By analyzing the solution of nonlinear partial differential equation, the time law of material diffusion in the droplet is obtained. Moreover, by comparing the residence and diffusion times, the diffusion time can be within or out of residence time range, which has a direct relationship to rotational speed and liquid flow. By experiment, the comparison between residence and diffusion times is more realistic when the rotational speed is higher.
文摘The right ventricular pacing （RVP） is the standard treat- ment for patients with severe bradyarrhythmias; however, it may cause and exacerbate heart failure symptoms in a long run under some circumstances.{1] In fact, significant left ventricular （LV） systolic dysfimction and symptomatic heart failure （HF） is commonly found in patient population with pacemaker implantations.
基金the National Natural Science Foundation of China (71302185)the Humanities and Social Sciences Research Youth Fund Project of the Ministry of Education (13YJC790060)the Chinese Enterprise Cost Management Innovation Team (JBK130508)
文摘Recently, with the migration of wealthy Chinese elites becoming increasingly prevalent, the market has come to believe that firms with controlling persons with foreign residency rights have serious agency problems. We study the impact of controlling persons with foreign residency rights on corporate audit perspective. We find that firms whose controlling persons have foreign residency rights are more likely to use high-quality auditing services, and that this behavior is more obvious in regions with lower marketization and in firms with higher separation of ownership and control. We further study the effect of firms whose controlling persons have foreign residency rights that use high-quality Big 4 auditors and find that such firms have better corporate governance and accounting performance.
