Lead(Pb)isotopes have been extensively employed in tracing sources of Pb and its transport pathways through the environment.However,Pb isotopic ratios in related geochemical reference materials are scarce.Here,we repo...Lead(Pb)isotopes have been extensively employed in tracing sources of Pb and its transport pathways through the environment.However,Pb isotopic ratios in related geochemical reference materials are scarce.Here,we report high-precision Pb isotopic ratios measured by Nu Plasma II MC-ICP-MS using calibrated ^(205)Tl/^(203)Tl=2.38865(NIST SRM 997)for mass discrimination correction.The long-term external precision(2SD)for NISTSRM 981 of Pb,BCR-2,and BHVO-2 are 0.31‰(n=105),0.42‰(n=11),and 0.25‰(n=5)for ^(208)Pb/ ^(206)Pb and 0.16‰,0.53‰,and 0.07‰for ^(206)Pb/ ^(207)Pb,both respectively,and their Pb isotopic ratios are in excellent agreement with the recommended values.Using this method,we report for the first time Pb isotopic compositions in shale SGR-1b(USGS);coal CLB-1(USGS);stream sediments GSD-17,-21,and-23(IGGE);soils GSS-12,-13,-14,-15,and-16(IGGE);plants GSV-1,-2,and-3(IGGE);and human hair GSH-1(IGGE).展开更多
Objective To establish albumin-creatinine ratio （ACR） reference value of the rural population in Hebei province. Methods This study enrolled 5154 participants. By excluding subjects with hypertension, diabetes, dys...Objective To establish albumin-creatinine ratio （ACR） reference value of the rural population in Hebei province. Methods This study enrolled 5154 participants. By excluding subjects with hypertension, diabetes, dyslipidemia, cardiovascular and cerebrovascular diseases, kidney diseases, and overweight condition, as well as those with an estimated glomerular filtration rate （eGFR）（60 ml/（min· 1.73 m^2）, apparently healthy subjects （1168） were selected. Urine albumin was measured by using the immunoturbidimetic method, serum creatinine was measured by using Jaffe＇s kinetic method on a morning spot-urine sample, and ACR was calculated. The 95th percentile of ACR in the healthy subjects was used as the normal upper limit. Results The normal upper limit of ACR was 28.71 mg/g （3.25 mg/retool） for males and 31.85 mg/g （3.60 rag/retool） for females. Based on this ACR reference value, the age-gender standardized prevalence of albuminuria in the rural areas of Hebei province was 12.9%. Conclusion The ACR reference value in the rural of Hebei province is higher than that of the Western population.展开更多
The principle of optical fiber pressure sensing probe with common diaphragm and the method for stabilizing the laser diodes are described in this paper at first.Then we discussed the improvement in characteristics of ...The principle of optical fiber pressure sensing probe with common diaphragm and the method for stabilizing the laser diodes are described in this paper at first.Then we discussed the improvement in characteristics of the system by means of taking the techniques of reference light channel and ratio measurement.展开更多
It is important to determine the most appropriate levels of risk and return for small investors. For that purpose, the investment funds are very important tools to create a portfolio for small investors, to deploy the...It is important to determine the most appropriate levels of risk and return for small investors. For that purpose, the investment funds are very important tools to create a portfolio for small investors, to deploy the potential risks in optimal proportions, and to direct investors. In this study, the performance of 83 pieces of investment funds will be evaluated which are treated in Turkey dates from January 1, 2010 to December 31, 2012 with performance evaluation methods such as Sharpe, Modigliani （M2） that is based on the standard deviation, and Treynor, T2, Jensen that is based on systematic risk （beta）, and the highest and lowest performance investment funds will be presented. The aim of the study is to examine the success of the investment fund managers whether they could estimate the course of the market well or not regarding time period. The empirical results show that the investors who invest on the funds that have negative risk premium by investing in the investment funds getting under the risk cannot get more excess return than getting the return from the risk-free interest rate as treasury bills. The result implies that it could be said that the systematic and total risks of all investment funds are low and they are not sensitive to the developments in the market, and thus, regarding funds could be called as conservative funds.展开更多
Macbeth was wary when he heard the witches out. He deliberated. He dithered. And Lady Macbeth puckered his courage up to the hilt and egged him on to murder. Macbeth murdered. Then he balked. He hallucinated himself o...Macbeth was wary when he heard the witches out. He deliberated. He dithered. And Lady Macbeth puckered his courage up to the hilt and egged him on to murder. Macbeth murdered. Then he balked. He hallucinated himself out of his wits. Then he went on a rampage to save his own skin. He destroyed in fear of being destroyed. Yet all he ended up doing is losing his peace, his composure, his wife, and finally, his life. The whole of Operation Kingship, if the author may so call the whole business of eliminating Duncan out of the way of the royal throne, failed miserably. Macbeth, on the lookout for power found himself terribly, fearfully beaten, crestfallen, devastated. The million-dollar question then is -what is it that went so very wrong in the whole process？ Critics are often heard to cry his ambition--his ＂overvaulting ambition＂ down as his incorrigible hamartia. But living in the 21st century, one gets to hear that ambition is not bad after all--the higher the ＂ambi-horse＂ vaults, the higher the chances of success is. In this dissertation, the author proposes to analyze Macbeth＇s case from the perspective of management studies. This paper, more than setting forth a literary statement of Macbeth＇s predicament, aims at what management Gurus would love to call a candid SWOT （strength, weakness, opportunity, threat） and STEEPLED （social, technological, economic, educational, political, legal, environmental, and demographic factors） analysis of Macbeth＇s situation to find out where the shoe pinched, whether the whole project crashed because of inefficient leadership, or whether there was no leadership at all, whether organizational strategies were not properly formulated or whether the implementation capsized horribly, thereby making the whole business a rudderless wild goose chase. The discussion necessarily follows up with an insight into what Macbeth lacked as far as Maslow＇s Pyramid of Needs is concerned and what it could have been like, had it been rewritten with a corporate-friendly, management-savvy 21st century protagonist armed with well formulated action plans and stronger inter-personal skills, in the titular lead.展开更多
基金supported by National Key Basic Research Program of China(2014CB238903)the National Natural Science Foundation of China(Nos.41473028,41673017,U1612441)the Opening Fund of State Key Laboratory of Environmental Geochemistry(SKLEG2015201)
文摘Lead(Pb)isotopes have been extensively employed in tracing sources of Pb and its transport pathways through the environment.However,Pb isotopic ratios in related geochemical reference materials are scarce.Here,we report high-precision Pb isotopic ratios measured by Nu Plasma II MC-ICP-MS using calibrated ^(205)Tl/^(203)Tl=2.38865(NIST SRM 997)for mass discrimination correction.The long-term external precision(2SD)for NISTSRM 981 of Pb,BCR-2,and BHVO-2 are 0.31‰(n=105),0.42‰(n=11),and 0.25‰(n=5)for ^(208)Pb/ ^(206)Pb and 0.16‰,0.53‰,and 0.07‰for ^(206)Pb/ ^(207)Pb,both respectively,and their Pb isotopic ratios are in excellent agreement with the recommended values.Using this method,we report for the first time Pb isotopic compositions in shale SGR-1b(USGS);coal CLB-1(USGS);stream sediments GSD-17,-21,and-23(IGGE);soils GSS-12,-13,-14,-15,and-16(IGGE);plants GSV-1,-2,and-3(IGGE);and human hair GSH-1(IGGE).
基金Supported by the National Basic Research Program of China(973 Program)(2007CB512201)the Program of Health Policy for blindness prevention from China+2 种基金the Key Technologies R&D Program(2006-10903)from the Science and Technology Bureau of Handan City,Hebei Province,Chinaa program from Beijing Tongren Hospitalkey discipline fund of Health Bureau,Handan City,Hebei Province,China
文摘Objective To establish albumin-creatinine ratio （ACR） reference value of the rural population in Hebei province. Methods This study enrolled 5154 participants. By excluding subjects with hypertension, diabetes, dyslipidemia, cardiovascular and cerebrovascular diseases, kidney diseases, and overweight condition, as well as those with an estimated glomerular filtration rate （eGFR）（60 ml/（min· 1.73 m^2）, apparently healthy subjects （1168） were selected. Urine albumin was measured by using the immunoturbidimetic method, serum creatinine was measured by using Jaffe＇s kinetic method on a morning spot-urine sample, and ACR was calculated. The 95th percentile of ACR in the healthy subjects was used as the normal upper limit. Results The normal upper limit of ACR was 28.71 mg/g （3.25 mg/retool） for males and 31.85 mg/g （3.60 rag/retool） for females. Based on this ACR reference value, the age-gender standardized prevalence of albuminuria in the rural areas of Hebei province was 12.9%. Conclusion The ACR reference value in the rural of Hebei province is higher than that of the Western population.
文摘The principle of optical fiber pressure sensing probe with common diaphragm and the method for stabilizing the laser diodes are described in this paper at first.Then we discussed the improvement in characteristics of the system by means of taking the techniques of reference light channel and ratio measurement.
文摘It is important to determine the most appropriate levels of risk and return for small investors. For that purpose, the investment funds are very important tools to create a portfolio for small investors, to deploy the potential risks in optimal proportions, and to direct investors. In this study, the performance of 83 pieces of investment funds will be evaluated which are treated in Turkey dates from January 1, 2010 to December 31, 2012 with performance evaluation methods such as Sharpe, Modigliani （M2） that is based on the standard deviation, and Treynor, T2, Jensen that is based on systematic risk （beta）, and the highest and lowest performance investment funds will be presented. The aim of the study is to examine the success of the investment fund managers whether they could estimate the course of the market well or not regarding time period. The empirical results show that the investors who invest on the funds that have negative risk premium by investing in the investment funds getting under the risk cannot get more excess return than getting the return from the risk-free interest rate as treasury bills. The result implies that it could be said that the systematic and total risks of all investment funds are low and they are not sensitive to the developments in the market, and thus, regarding funds could be called as conservative funds.
文摘Macbeth was wary when he heard the witches out. He deliberated. He dithered. And Lady Macbeth puckered his courage up to the hilt and egged him on to murder. Macbeth murdered. Then he balked. He hallucinated himself out of his wits. Then he went on a rampage to save his own skin. He destroyed in fear of being destroyed. Yet all he ended up doing is losing his peace, his composure, his wife, and finally, his life. The whole of Operation Kingship, if the author may so call the whole business of eliminating Duncan out of the way of the royal throne, failed miserably. Macbeth, on the lookout for power found himself terribly, fearfully beaten, crestfallen, devastated. The million-dollar question then is -what is it that went so very wrong in the whole process？ Critics are often heard to cry his ambition--his ＂overvaulting ambition＂ down as his incorrigible hamartia. But living in the 21st century, one gets to hear that ambition is not bad after all--the higher the ＂ambi-horse＂ vaults, the higher the chances of success is. In this dissertation, the author proposes to analyze Macbeth＇s case from the perspective of management studies. This paper, more than setting forth a literary statement of Macbeth＇s predicament, aims at what management Gurus would love to call a candid SWOT （strength, weakness, opportunity, threat） and STEEPLED （social, technological, economic, educational, political, legal, environmental, and demographic factors） analysis of Macbeth＇s situation to find out where the shoe pinched, whether the whole project crashed because of inefficient leadership, or whether there was no leadership at all, whether organizational strategies were not properly formulated or whether the implementation capsized horribly, thereby making the whole business a rudderless wild goose chase. The discussion necessarily follows up with an insight into what Macbeth lacked as far as Maslow＇s Pyramid of Needs is concerned and what it could have been like, had it been rewritten with a corporate-friendly, management-savvy 21st century protagonist armed with well formulated action plans and stronger inter-personal skills, in the titular lead.
