The efficient and accurate synthesis of physical parameter-controllable impact sounds is essential for sound source identification. In this study, an impact sound synthesis model of a cylinder is proposed based on dis...The efficient and accurate synthesis of physical parameter-controllable impact sounds is essential for sound source identification. In this study, an impact sound synthesis model of a cylinder is proposed based on discrete state space（DSS） method and modal extension method（MEM）. This model is comprised of the whole three processes of the physical interaction, i.e., the Hertz contact process, the transient structural response process, and the sound radiation process. Firstly,the modal expanded DSS equations of the contact system are constructed and the transient structural response of the cylinder is obtained. Then the impact sound of the cylinder is acquired using improved discrete Raleigh integral. Finally, the proposed model is verified by comparing with existing models. The results show that the proposed impact sound synthesis model is more accurate and efficient than the existing methods and easy to be extended to the impact sound synthesis of other structures.展开更多
A time dependent Hamiltonian associated to the impact parameter model for the scattering of a light particle and two heavy ones is considered. Existence and non degeneracy of the ground state is shown.
保护状况评估(State of Conservation,SOC)是世界遗产的评估管理环节,目的是持续掌握遗产所面临的各类威胁。文章解读世界遗产SOC评估机制及其发展、完善过程,分析其影响因素指标体系,并结合世界遗产的典型案例,阐释SOC评估在世界遗产...保护状况评估(State of Conservation,SOC)是世界遗产的评估管理环节,目的是持续掌握遗产所面临的各类威胁。文章解读世界遗产SOC评估机制及其发展、完善过程,分析其影响因素指标体系,并结合世界遗产的典型案例,阐释SOC评估在世界遗产保护管理实践中的应用和实效。建议在我国城乡文化遗产保护管理中,建立影响因素评估标准化指标体系以及有效的跟踪和退出机制,以维护文化遗产的价值和遗产名录的可信度,使有限的保护资源得以集中利用。展开更多
Background: Efforts to combat tuberculosis in Nigeria focus on evaluation of strategies for treatment and prevention, with little attention paid to the impact of the burden of illness and its therapy on the HRQoL of T...Background: Efforts to combat tuberculosis in Nigeria focus on evaluation of strategies for treatment and prevention, with little attention paid to the impact of the burden of illness and its therapy on the HRQoL of TB patients. This study evaluated the quality of life (QoL) of TB patients in relation to their financial, psychological and social well-being. Method: In 2011, following an active case finding for TB in Akwa Ibom State of Nigeria, a structured questionnaire for evaluating HRQoL was distributed to TB patients who had been on treatment in four DOTs centres of the state for at least three months. The questions were to elicit responses that conveyed the respondents’ perspective of the disease. One hundred and eight TB patients (54 males and 54 females) aged 15 - 80 years were studied. Results: Negative emotions including fear, frustration and worry characterized the reactions of all subjects following news of their diagnosis with TB. However, following treatment, 62% of subjects expressed high expectation of being cured. Inability to continue functioning in their roles at home or as heads of households was recorded in 48.1% (52/108) and 59% (23/39) of respondents respectively and contributed to the negative emotions expressed above. Lack of basic supplies such as food and finances to meet personal and family needs constituted the most important socio-economic challenges. Socio-economic status of respondents revealed that 61% had no regular means of income with at least 94% earning less than $50 (8000 naira) a month. Subsistent farmers and petty traders constituted more than 66% of the respondents: 98% obtained less than or equivalent of high school education. Socially, all health workers and 87% of family members were sympathetic and supportive compared to friends, with 42% exhibiting stigmatization. The most frequent forms of support from family members were financial (25%) and provision of food (37%). Up to 28% were regularly prompted by family to take their medication. Conclusion: In the midst of obvious socio-economic challenges confronting TB patients in this study, the initial negative emotions declined following the supportive roles of mainly health care workers and family members. Patients were optimistic of achieving cure at the end of the treatment.展开更多
The overall goal of this study is investigating the environmental impacts of using wastewater effluent of industrial states in irrigation of green space. For this purpose, industrial state of Shokouhieh in Qom Provinc...The overall goal of this study is investigating the environmental impacts of using wastewater effluent of industrial states in irrigation of green space. For this purpose, industrial state of Shokouhieh in Qom Province in central of Iran was selected as a case study. Firstly, the quality and quantity of inputting wastewater into refinery and outputting wastewater effluent were measured on important parameters of pH, TDS, TSS, COD, BOD and wastewater temperature in refinery laboratory of industrial state of Qom Shokouhieh during 12 months from March 2012 to March 2013. Then analysis of chemical, biological and physical indicators of irrigation wastewater (effluent) and measurement of heavy metals were done in June 2012 and January 2013 according to the standards instruction for the water and wastewater treatment. Also, heavy metals, EC, pH, and Mg2+, Ca2+, Na+, k+ of soil of industrial estate of Qom Shokouhieh were studied. Then, Rapid Impact Assessment Method (RIAM) and Entropy Method were used to analyze the data. In Rapid Impact Assessment Method, socio-cultural, physicochemical, biological and economic environments get the highest negative impacts respectively. In Entropy Method after weighting the environmental factors, public health and other disease parameters with the weight of 0.147, soil chemical properties with the weight of 0.136, soil toxicity with the weight of 0.126 were allocated the first rate up to the third rate respectively. After comparing the results of these two methods with each other, the main limitation of using wastewater effluent of industrial estate of Qom Shokouhie in irrigation of green space is entering chemical pollutants (nitrate) into groundwater, salinity and toxicity of soil of industrial state and endangerment of workers and labors public health who work in industrial state of Qom Shokouhie (specially the labors who exposure directly with the wastewater effluent and labors work in refinery).展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11574249 and 11874303)the Natural Science Basic Research Plan in Shaanxi Province of China(Grant No.2018JQ1001)
文摘The efficient and accurate synthesis of physical parameter-controllable impact sounds is essential for sound source identification. In this study, an impact sound synthesis model of a cylinder is proposed based on discrete state space（DSS） method and modal extension method（MEM）. This model is comprised of the whole three processes of the physical interaction, i.e., the Hertz contact process, the transient structural response process, and the sound radiation process. Firstly,the modal expanded DSS equations of the contact system are constructed and the transient structural response of the cylinder is obtained. Then the impact sound of the cylinder is acquired using improved discrete Raleigh integral. Finally, the proposed model is verified by comparing with existing models. The results show that the proposed impact sound synthesis model is more accurate and efficient than the existing methods and easy to be extended to the impact sound synthesis of other structures.
文摘A time dependent Hamiltonian associated to the impact parameter model for the scattering of a light particle and two heavy ones is considered. Existence and non degeneracy of the ground state is shown.
文摘保护状况评估(State of Conservation,SOC)是世界遗产的评估管理环节,目的是持续掌握遗产所面临的各类威胁。文章解读世界遗产SOC评估机制及其发展、完善过程,分析其影响因素指标体系,并结合世界遗产的典型案例,阐释SOC评估在世界遗产保护管理实践中的应用和实效。建议在我国城乡文化遗产保护管理中,建立影响因素评估标准化指标体系以及有效的跟踪和退出机制,以维护文化遗产的价值和遗产名录的可信度,使有限的保护资源得以集中利用。
文摘Background: Efforts to combat tuberculosis in Nigeria focus on evaluation of strategies for treatment and prevention, with little attention paid to the impact of the burden of illness and its therapy on the HRQoL of TB patients. This study evaluated the quality of life (QoL) of TB patients in relation to their financial, psychological and social well-being. Method: In 2011, following an active case finding for TB in Akwa Ibom State of Nigeria, a structured questionnaire for evaluating HRQoL was distributed to TB patients who had been on treatment in four DOTs centres of the state for at least three months. The questions were to elicit responses that conveyed the respondents’ perspective of the disease. One hundred and eight TB patients (54 males and 54 females) aged 15 - 80 years were studied. Results: Negative emotions including fear, frustration and worry characterized the reactions of all subjects following news of their diagnosis with TB. However, following treatment, 62% of subjects expressed high expectation of being cured. Inability to continue functioning in their roles at home or as heads of households was recorded in 48.1% (52/108) and 59% (23/39) of respondents respectively and contributed to the negative emotions expressed above. Lack of basic supplies such as food and finances to meet personal and family needs constituted the most important socio-economic challenges. Socio-economic status of respondents revealed that 61% had no regular means of income with at least 94% earning less than $50 (8000 naira) a month. Subsistent farmers and petty traders constituted more than 66% of the respondents: 98% obtained less than or equivalent of high school education. Socially, all health workers and 87% of family members were sympathetic and supportive compared to friends, with 42% exhibiting stigmatization. The most frequent forms of support from family members were financial (25%) and provision of food (37%). Up to 28% were regularly prompted by family to take their medication. Conclusion: In the midst of obvious socio-economic challenges confronting TB patients in this study, the initial negative emotions declined following the supportive roles of mainly health care workers and family members. Patients were optimistic of achieving cure at the end of the treatment.
文摘The overall goal of this study is investigating the environmental impacts of using wastewater effluent of industrial states in irrigation of green space. For this purpose, industrial state of Shokouhieh in Qom Province in central of Iran was selected as a case study. Firstly, the quality and quantity of inputting wastewater into refinery and outputting wastewater effluent were measured on important parameters of pH, TDS, TSS, COD, BOD and wastewater temperature in refinery laboratory of industrial state of Qom Shokouhieh during 12 months from March 2012 to March 2013. Then analysis of chemical, biological and physical indicators of irrigation wastewater (effluent) and measurement of heavy metals were done in June 2012 and January 2013 according to the standards instruction for the water and wastewater treatment. Also, heavy metals, EC, pH, and Mg2+, Ca2+, Na+, k+ of soil of industrial estate of Qom Shokouhieh were studied. Then, Rapid Impact Assessment Method (RIAM) and Entropy Method were used to analyze the data. In Rapid Impact Assessment Method, socio-cultural, physicochemical, biological and economic environments get the highest negative impacts respectively. In Entropy Method after weighting the environmental factors, public health and other disease parameters with the weight of 0.147, soil chemical properties with the weight of 0.136, soil toxicity with the weight of 0.126 were allocated the first rate up to the third rate respectively. After comparing the results of these two methods with each other, the main limitation of using wastewater effluent of industrial estate of Qom Shokouhie in irrigation of green space is entering chemical pollutants (nitrate) into groundwater, salinity and toxicity of soil of industrial state and endangerment of workers and labors public health who work in industrial state of Qom Shokouhie (specially the labors who exposure directly with the wastewater effluent and labors work in refinery).
