The growth of farmer＇s incomes is cIoseIy reIated to rural finance. The research analyzed the dynamic reIationship of rural financial deveIopment, efficiency and farmer＇s incomes based on VAR modeI, and the resuIts ...The growth of farmer＇s incomes is cIoseIy reIated to rural finance. The research analyzed the dynamic reIationship of rural financial deveIopment, efficiency and farmer＇s incomes based on VAR modeI, and the resuIts indicated that the ex-pansion of rural finance wouId stimuIate farmer＇s incomes in a Iong term, and the growth of rural financial efficiency significantIy improves farmer＇s incomes in a short term, instead of a Iong term. Hence, it is necessary to introduce more credit funds and social funds to rural areas, deepen rural financial system reform and acceIerate use rate of Ioan capital and enhance guidance for farmers and township enterprises in use of Ioan capitals.展开更多
According to regional characteristics and the actual situation in Lin ’an City, an evaluation index system of land comprehensive carrying capacity composed of three support subsystems （eco-environment, social and ec...According to regional characteristics and the actual situation in Lin ’an City, an evaluation index system of land comprehensive carrying capacity composed of three support subsystems （eco-environment, social and economic carrying capaci-ties） containing 22 evaluation indexes was established to evaluate the comprehen-sive carrying capacity of land resource in Lin’an City during 2005-2012. Meanwhile, based on the target data of overal land use plan, the level of land comprehensive carrying capacity was predicted at the end of the plan period （2020） .The results showed that land comprehensive carrying capacity had a significant growth in Lin ’an from 2005 to 2012, and the development trend was basical y sustainable. The sub-systems also had been greatly improved, in which the constant improvement of ec-ological environment carrying capacity made the largest contribution to the constant raising of land comprehensive carrying capacity. The degree of coordination between the systems was poor, in which eco-environment carrying capacity had the maxi-mum growth, far more than the social and economic carrying capacities. According to the land comprehensive carrying capacity in 2020, utilization of land resources in Lin＆#39;an city can achieve sustainable development in general. Final y, proposals of im-proving comprehensive carrying capacity were put forward in terms of the enhance-ment of eco-environment protection, accelerating economic development and policy guidance.展开更多
In this paper, a novel image encryption scheme based on Keplers third law and random Hadamard transform is proposed to ensure the security of a digital image. First, a set of Kepler periodic sequences is generated to ...In this paper, a novel image encryption scheme based on Keplers third law and random Hadamard transform is proposed to ensure the security of a digital image. First, a set of Kepler periodic sequences is generated to permutate image data, which is characteristic of the plain-image and the Keplers third law. Then, a random Hadamard matrix is constructed by combining the standard Hadamard matrix with the hyper-Chen chaotic system, which is used to further scramble the image coefficients when the image is transformed through random Hadamard transform. In the end, the permuted image presents interweaving diffusion based on two special matrices, which are constructed by Kepler periodic sequence and chaos system. The experimental results and performance analysis show that the proposed encrypted scheme is highly sensitive to the plain-image and external keys, and has a high security and speed, which are very suitable for secure real-time communication of image data.展开更多
In this study, the thermoelectric properties of pyrene molecule doped with boron and nitrogen atom at different sites of molecule are investigated using density functional theory and none-equilibrium Greens function f...In this study, the thermoelectric properties of pyrene molecule doped with boron and nitrogen atom at different sites of molecule are investigated using density functional theory and none-equilibrium Greens function formalism in the linear response regime. Our calculations show that when the impurities are added to the edge of the molecule, the anti-resonant peaks will appear in the transmission diagram in the vicinity of the Fermi energy level. So it increases the thermoelectric figure of merit of the system in comparison with the one that the impurity is located in the center of molecule. Additionally, the seebeck coefficient signs are not the same among the B, N, and N ＆ B doped devices, indicating that the types of the carriers can be changed with different types of doping.展开更多
目的：分析建筑陶瓷粉尘对作业工人的职业健康危害。方法选择某建筑陶瓷厂885名粉尘作业工人为接尘组，以195名非粉尘作业工人为对照组，对2组人员进行职业健康检查，结合工作场所空气中粉尘测定结果进行分析。结果该陶瓷厂工作场所陶...目的：分析建筑陶瓷粉尘对作业工人的职业健康危害。方法选择某建筑陶瓷厂885名粉尘作业工人为接尘组，以195名非粉尘作业工人为对照组，对2组人员进行职业健康检查，结合工作场所空气中粉尘测定结果进行分析。结果该陶瓷厂工作场所陶瓷粉尘中游离二氧化硅（SiO2）质量分数为21.1％-38.0％（28.3±6.5）％。总粉尘时间加权平均浓度（CTWA）为0.10-8.20 mg/m3，超标率28.95％（11/38），最高超过职业接触限值7.2倍；呼吸性粉尘CTWA为0.10-1.79 mg/m3，超标率为18.42％（7/38），最高超过职业接触限值1.6倍。接尘组诊断陶工尘肺6例（壹期5例，贰期1例），检出率为0.68％。粉尘作业禁忌证检出率为1.69％（15/885）。接尘组肺通气功能异常检出率高于对照组（9.60％ vs 2.56％，P〈0.01）。接尘组工人心电图异常率高于对照组（8.81％ vs 1.54％，P〈0.01）。结论建筑陶瓷粉尘对作业工人健康危害较为严重。有关企业应加强对粉尘危害的控制工作，保护工人健康。展开更多
The presence of high indoor radon concentrations,Cx,is a major concern of the public worldwide.Measurements of indoor radon in South Lebanon have been achieved using CR-39 detectors.Cxvalues ranged between 30 and 122 ...The presence of high indoor radon concentrations,Cx,is a major concern of the public worldwide.Measurements of indoor radon in South Lebanon have been achieved using CR-39 detectors.Cxvalues ranged between 30 and 122 Bq m-3 in one of the major towns in the area and are compared with measured atmospheric air Radon.Moderate seasonal variation of Cxindoors has been observed,although 90%of the obtained indoor Cxmeasurements are below 100 Bq m-3.Some homes produced Cxreadings above the permissible limit.Results showed that the ventilation effect played a major factor in reducing radon concentration levels indoors.Health assessment has been considered.Annual effective doses of radon varied from 1.01±0.10 to 8.65±0.50 m Sv a-1 in six homes in one of the four cases studied.These dosage values are above the permitted limit of 2.5 m Sv a-1.Several types of granite contained in the studied homes were identified and their contributions to radon levels indoors were calculated.展开更多
基金Supported by Hubei Provincial Department of Education Science and Technology Research Project(Q20131207)~~
文摘The growth of farmer＇s incomes is cIoseIy reIated to rural finance. The research analyzed the dynamic reIationship of rural financial deveIopment, efficiency and farmer＇s incomes based on VAR modeI, and the resuIts indicated that the ex-pansion of rural finance wouId stimuIate farmer＇s incomes in a Iong term, and the growth of rural financial efficiency significantIy improves farmer＇s incomes in a short term, instead of a Iong term. Hence, it is necessary to introduce more credit funds and social funds to rural areas, deepen rural financial system reform and acceIerate use rate of Ioan capital and enhance guidance for farmers and township enterprises in use of Ioan capitals.
基金Supported by National Natural Science Foundation of China(41401416)Jiangsu Agricultural Self-innovation Foundation(CX-13-3055)Jiangsu Fundamental Research Plan(BK20140759)~~
文摘According to regional characteristics and the actual situation in Lin ’an City, an evaluation index system of land comprehensive carrying capacity composed of three support subsystems （eco-environment, social and economic carrying capaci-ties） containing 22 evaluation indexes was established to evaluate the comprehen-sive carrying capacity of land resource in Lin’an City during 2005-2012. Meanwhile, based on the target data of overal land use plan, the level of land comprehensive carrying capacity was predicted at the end of the plan period （2020） .The results showed that land comprehensive carrying capacity had a significant growth in Lin ’an from 2005 to 2012, and the development trend was basical y sustainable. The sub-systems also had been greatly improved, in which the constant improvement of ec-ological environment carrying capacity made the largest contribution to the constant raising of land comprehensive carrying capacity. The degree of coordination between the systems was poor, in which eco-environment carrying capacity had the maxi-mum growth, far more than the social and economic carrying capacities. According to the land comprehensive carrying capacity in 2020, utilization of land resources in Lin＆#39;an city can achieve sustainable development in general. Final y, proposals of im-proving comprehensive carrying capacity were put forward in terms of the enhance-ment of eco-environment protection, accelerating economic development and policy guidance.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61661008 and 61603104)the Natural Science Foundation of Guangxi Zhuang Autonomous Region,China(Grant Nos.2015GXNSFBA139256 and 2016GXNSFCA380017)+3 种基金the Funding of Overseas 100 Talents Program of Guangxi Provincial Higher Education,China,the Research Project of Guangxi University of China(Grant No.KY2016YB059)the Guangxi Key Laboratory of Multi-source Information Mining&Security,China(Grant No.MIMS15-07)the Doctoral Research Foundation of Guangxi Normal University,the Guangxi Provincial Experiment Center of Information Sciencethe Innovation Project of Guangxi Graduate Education(Grant No.YCSZ2017055)
文摘In this paper, a novel image encryption scheme based on Keplers third law and random Hadamard transform is proposed to ensure the security of a digital image. First, a set of Kepler periodic sequences is generated to permutate image data, which is characteristic of the plain-image and the Keplers third law. Then, a random Hadamard matrix is constructed by combining the standard Hadamard matrix with the hyper-Chen chaotic system, which is used to further scramble the image coefficients when the image is transformed through random Hadamard transform. In the end, the permuted image presents interweaving diffusion based on two special matrices, which are constructed by Kepler periodic sequence and chaos system. The experimental results and performance analysis show that the proposed encrypted scheme is highly sensitive to the plain-image and external keys, and has a high security and speed, which are very suitable for secure real-time communication of image data.
文摘In this study, the thermoelectric properties of pyrene molecule doped with boron and nitrogen atom at different sites of molecule are investigated using density functional theory and none-equilibrium Greens function formalism in the linear response regime. Our calculations show that when the impurities are added to the edge of the molecule, the anti-resonant peaks will appear in the transmission diagram in the vicinity of the Fermi energy level. So it increases the thermoelectric figure of merit of the system in comparison with the one that the impurity is located in the center of molecule. Additionally, the seebeck coefficient signs are not the same among the B, N, and N ＆ B doped devices, indicating that the types of the carriers can be changed with different types of doping.
文摘目的：分析建筑陶瓷粉尘对作业工人的职业健康危害。方法选择某建筑陶瓷厂885名粉尘作业工人为接尘组，以195名非粉尘作业工人为对照组，对2组人员进行职业健康检查，结合工作场所空气中粉尘测定结果进行分析。结果该陶瓷厂工作场所陶瓷粉尘中游离二氧化硅（SiO2）质量分数为21.1％-38.0％（28.3±6.5）％。总粉尘时间加权平均浓度（CTWA）为0.10-8.20 mg/m3，超标率28.95％（11/38），最高超过职业接触限值7.2倍；呼吸性粉尘CTWA为0.10-1.79 mg/m3，超标率为18.42％（7/38），最高超过职业接触限值1.6倍。接尘组诊断陶工尘肺6例（壹期5例，贰期1例），检出率为0.68％。粉尘作业禁忌证检出率为1.69％（15/885）。接尘组肺通气功能异常检出率高于对照组（9.60％ vs 2.56％，P〈0.01）。接尘组工人心电图异常率高于对照组（8.81％ vs 1.54％，P〈0.01）。结论建筑陶瓷粉尘对作业工人健康危害较为严重。有关企业应加强对粉尘危害的控制工作，保护工人健康。
文摘The presence of high indoor radon concentrations,Cx,is a major concern of the public worldwide.Measurements of indoor radon in South Lebanon have been achieved using CR-39 detectors.Cxvalues ranged between 30 and 122 Bq m-3 in one of the major towns in the area and are compared with measured atmospheric air Radon.Moderate seasonal variation of Cxindoors has been observed,although 90%of the obtained indoor Cxmeasurements are below 100 Bq m-3.Some homes produced Cxreadings above the permissible limit.Results showed that the ventilation effect played a major factor in reducing radon concentration levels indoors.Health assessment has been considered.Annual effective doses of radon varied from 1.01±0.10 to 8.65±0.50 m Sv a-1 in six homes in one of the four cases studied.These dosage values are above the permitted limit of 2.5 m Sv a-1.Several types of granite contained in the studied homes were identified and their contributions to radon levels indoors were calculated.
