基于流域尺度的土壤盐分空间变异特征——以渭干河-库车河流域三角洲绿洲为例

土壤中水溶性盐的分析,是发展研究盐渍土盐分动态监测与预报技术的重要基础工作。针对目前干旱半干旱区广泛存在的绿洲土壤次生盐渍化问题,基于GIS和地统计学方法,研究了渭干河—库车河流域三角洲绿洲盐渍化土壤特征(土壤含盐量)的空间变异性。研究结果表明:渭-库绿洲土壤含盐量的空间变异性为中等变异,且随土壤深度增加而减弱。各层土壤的合理采样数为在95%置信水平,20%误差下的合理采样数目。高斯模型能够较好的拟合10-30cm及30-50cm层土壤含盐量的空间结构。各层土壤盐分空间变异性受到结构性与随机性因素共同作用的影响,呈强空间相关性。套合结构模型考虑到0-10cm层土壤盐分空间变异的尺度依赖性,能够更好的拟合0-10cm层土壤含盐量的空间结构。Kriging插值以及空间等值线分布趋势图能够直观的表现研究区内土壤盐分含量的空间分布状况和变化情况。研究为土壤特征变量空间变异分析与评价提供了普适性较强的实现方法,为构建盐渍土定量动态监测模型以及盐渍土的改良利用提供一定的科学依据。     

基于博弈论的护理管理道德风险控制分析

护理管理过程中的委托代理关系及信息不对称性可能导致道德风险的存在,由此可能引发护患冲突,影响医院的品牌信誉和经济效益。以博弈论为研究方法,对护理管理过程中护理管理部门与护理人员之间和患者与护理人员之间存在的道德风险进行了博弈分析,找出了两种关系下博弈双方的混合战略纳什均衡。护理部与护理人员之间的混合战略纳什均衡是α=D/E与β=（E－B）/E,患者与护理人员之间的混合战略纳什均衡是γ=T/U与δ=（U＋R）/U。为持续维持护理管理中稳定均衡的博弈关系,医院应该采取措施加强道德风险的管理与防范,并开展延续护理服务,政府主导人力资源的配置改革并进行干预。     

2015年至2019年辽宁省某医院血培养病原菌分布及耐药分析

分析2015年至2019年辽宁省人民医院血培养分离菌的科室分布及耐药情况,为临床提供数据参考.利用Whonet5.6软件对2015年至2019年辽宁省人民医院血培养临床数据进行分析.血培养阳性率为12.3％,共分离病原菌1266株,其中革兰阴性菌546株、革兰阳性菌649株、真菌71株;革兰阴性菌主要为大肠埃希菌(Es...     

GETTING MORAL ENHANCEMENT RIGHT: THE DESIRABILITY OF MORAL BIOENHANCEMENT

We respond to a number of objections raised by John Harris in this journal to our argument that we should pursue genetic and other biological means of morally enhancing human beings (moral bioenhancement). We claim that human beings now have at their disposal means of wiping out life on Earth and that traditional methods of moral education are probably insufficient to achieve the moral enhancement required to ensure that this will not happen. Hence, we argue, moral bioenhancement should be sought and applied. We argue that cognitive enhancement and technological progress raise acute problems because it is easier to harm than to benefit. We address objections to this argument. We also respond to objections that moral bioenhancement: (1) interferes with freedom; (2) cannot be made to target immoral dispositions precisely; (3) is redundant, since cognitive enhancement by itself suffices.     

helixCAM: A platform for programmable cellular assembly in bacteria and human cells

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A moral argument for frozen human embryo adoption

Some people (e.g., Drs. Paul and Susan Lim) and, with them, organizations (e.g., the National Embryo Donation Center) believe that, morally speaking, the death of a frozen human embryo is a very bad thing. With such people and organizations in mind, the question to be addressed here is as follows: if one believes that the death of a frozen embryo is a very bad thing, ought, morally speaking, one prevent the death of at least one frozen embryo via embryo adoption? By way of a three-premise argument, one of which is a moral principle first introduced by Peter Singer, my answer to this question is: at least some of those who believe this ought to. (Just who the “some” are is identified in the paper.) If this is correct, then, for said people, preventing the death of a frozen embryo via embryo adoption is not a morally neutral matter; it is, instead, a morally laden one. Specifically, their intentional refusal to prevent the death of a frozen embryo via embryo adoption is, at a minimum, morally criticizable and, arguably, morally forbidden. Either way, it is, to one extent or another, a moral failing.     

Forced migration: morality and politics

Thomas Faist’s contribution lies in wishing to deconstruct political perceptions around forced migration that reduce the protection that refugees can access. One important task we have as academics is exactly to challenge dominant discourses that function to oppress or control, serving the interests of some at the costs of others, and to be aware of our own role in perpetuating such discourses. One important area where Faist’s account fails to deconstruct existing discourse on forced migration is related to the political subjecthood of refugees and the political nature of their experiences. The reasons for flight are highly political, refugees are conscious political subjects, and refugee flows have always been a matter of high politics.     

确定水稻育苗床土肥料三要素最佳用量配方的数学模型

本文通过对水稻秧苗质量评价标准的分析,根据非线性规划与区间估计理论,构造出水稻育苗床土施肥的优化模型及其计算方法.