利用光敏核不育性进行水稻轮回选择的程序探讨

本文对利用光敏核不育性进行水稻轮回选择进行了探讨。提出基本轮回选择方案和综合轮回选择方案。基本轮回选择方案是以一个光敏核不育材料为母本与多个亲本组配构成轮回选择的综合群体,而其后按常规轮回选择法进行育种的方案。综合轮回选择方案是以两个或两个以上的光敏核不育材料作为母体与多个亲本组配,在 F_2代群体中不同质源的优良植株相互交配构成综合群体,其后按基本方案进行的轮回选择。     

中西宗教文化管见

本文从语言和社会生活的角度出发，对汉民族和北美的大众宗教信仰进行了初步探索，指出了人类心理中宗教观念存在的普遍性并探讨了宗教文化的发展趋势。     

科技兴市:佛山跨世纪的战略选择

作者运用理论分析和实证分析相结合的方法对佛山市经济发展的实践予以深刻剖视后指出:佛山市经济建设处在从物质投入主导型向科技进步主导塑转变的转折点上,在跨世纪的经济发展与经济竞争中,佛山市必须实行科技兴市的新发展战略,作者对佛山市科技兴市战略的涵义,目标,条件作了深入分析,并进而设计了科技兴市战略的运行机制和政策落点。     

Immigrants' Language Skills and Visa Category1

This article is concerned with the determinants of English language proficiency among immigrants in a longitudinal survey for Australia. It focuses on both visa category and variables derived from an economic model of the determinants of destination‐language proficiency among immigrants. Skills‐tested and economic immigrants have the greatest proficiency shortly after immigration, followed by family‐based visa recipients, with refugees having the lowest proficiency. Other variables the same, these differences disappear by 3.5 years after immigration for speaking skills; and although they diminish, they persist longer for reading and writing skills. The variables generated from the model of destination‐language proficiency (such as schooling and age at migration) are, in part, predictions of visa category, but they are more important statistically for explaining proficiency.     

基于Poisson分布需求的两级零售系统最优订货策略

考虑由一个分销中心和N个零售商组成的两级分销库存系统．假设两级库存补充均采取周期订货策略，在每个零售商处的客户需求是随机的，且服从Poisson分布．当给定的某一货物缺货时，顾客愿意等待特别订货的概率是一确定的常数，在满足给定的客户服务水平的条件下，寻求该供应链总费用的最小化．对库存费用的计算进行了精确的推导，并且得到了最优的订货策略．最后给出了一个算例，根据所得到的公式由电子表格获得了两级最优库存水平．     

知情权、新闻自由及立法

知情权作为公民的基本人权已成为广泛的共识,而新闻自由是实现知情权的重要途径。我国现行的法律法规对知情权的规定存在相当大的空白,而新闻自由也没有发展到一定的程度。立法上的缺陷直接影响并决定了政府监督缺位、人权保护不力等现象。我国当前应借鉴发达国家在知情权方面的立法,从而更好地保护新闻报道的自由权。     

吕祖谦朱熹共讲月泉说质疑

明末以来的不少文献资料如《嘉靖浦江志略》、《乾隆浦江县志》都记载,吕祖谦、朱熹曾一同讲学于浙江浦江县的月泉书院,即第一次在宋孝宗乾道年间,第二次在孝宗淳熙八年.但如果就古代文献所提供的这两个时间来考察,则所谓吕祖谦、朱熹一起讲学月泉的事实属子虚乌有,属以讹传讹,不能信以为真.而之所以会产生这种误传,与此两人一个作为儒学正宗,一个被公认为浙东学派的实际开创者不无关系.这一事实也反映出一些旧地方志乘不一定值得信赖.     

相互作用玻色子模型的连续变量表示

本文应用生成坐标方法(GCM)给出了相互作用玻色子模型(IBM)的连续变量表示,统一地处理了球形核和形变核的情形,并对轴对称形变核作出其连续变量表示的数值计算,其结果与IBM代数解(PHINT程序)是一致的.     

Risk prediction of hypertension complications based on the intelligent algorithm optimized Bayesian network

Hypertension and its related complications could be a major threat issue for cardiopathy and stroke. Effective prevention and control can decrease the incidence rate of complications in hypertension. Based on the medical data of 3062 patients with cardiovascular and cerebrovascular diseases from 2017 to 2018 in a grade-A tertiary hospital in Shanghai, the study identified the risk factors of hypertension complications by text mining. On this basis, the K2 algorithm based on the improved particle swarm optimization was proposed to optimize the structure of the Bayesian network (BN) by establishing a multi-population cooperative search mechanism. Then the optimized BN was used to analyze and predict the incidence rate of hypertension complications. Results indicate that the major indicators of accuracy, sensitivity, specificity, and AUC have been improved, and the proposed algorithm is superior to the common data mining algorithms such as the back propagation neural network and the decision tree. Through the proposed model and algorithm, the high-risk factors were identified and the occurrence probability of hypertension complications was predicted, which could provide the personalized health management guidance for hypertensive patients to prevent and control hypertension complications.