养殖大菱鲆血细胞形态和相关生理指标的测定

研究了大菱鲆血细胞的类型、形态以及血液生理学指标.大菱鲆的血细胞可区分为红细胞、淋巴细胞、单核细胞、嗜中性粒细胞和血栓细胞5种类型,没有发现嗜酸性粒细胞和嗜碱性粒细胞.在白细胞中,血栓细胞和小淋巴细胞较小,嗜中性粒细胞和单核细胞较大.血细胞计数测得红细胞密度为(2.73±0.22)×106个/mm3,白细胞密度为(1.79±0.25)×104个/mm3.淋巴细胞、单核细胞、嗜中性粒细胞和血栓细胞在白细胞中所占的比例分别为:(24.72±6.26)%,(5.26±1.95)%,(13.45±3.31)%和(56.60±9.52)%.血红蛋白含量为(6.63±0.58)g/100mL,红细胞渗透脆性为(0.38±0.04)%NaCl,凝血时间为(80±12)s.     

《幸运的吉姆》：小人物的愤怒与抗争

“愤怒的青年”文学流派中最著名的小说《幸运的吉姆》表达的是小人物对生存现状与社会不公所表现出来的愤怒与抗争。令人窒息的学院派作风、虚伪“精英文化”的趾高气扬和功利驱使下的学术不端行为是吉姆愤怒的诱因。吉姆用自己的方式进行反抗,他的奋力抗争代表的是社会中下阶层小人物对现实的反击。     

银行在信用证交易过程中所面临的欺诈风险及防范

信用证欺诈是一种严重影响当代国际贸易的一种非暴力犯罪,然而在各种信用证欺诈中,以银行为欺诈对象的欺诈比较普遍,且极大的危害着银行的信誉及利益,也给国际贸易带来了极大的风险,因而对以银行为目标的信用证欺诈的防范与制裁迫在眉睫。     

加拿大一枝黄花在安徽省的入侵现状、机理及对策

入侵生物加拿大一枝黄花近几年在安徽省迅速扩散蔓延,如果不加以控制,加拿大一枝黄花极易形成单一群落,严重破坏生物多样性。本文从加拿大一枝黄花在安徽省的入侵现状出发,着重探讨7其形成机制和防治对策。     

“全面两孩”政策对青年生育意愿的影响——以杭州市80后为例

通过问卷调查和实地访谈法,对杭州市"全面两孩"政策实施后80后生育意愿的变化进行了分析。调查结果表明,"全面两孩"政策的知晓度较高,但认知度尚有欠缺;绝大部分非独生子女已婚80后及未婚80后都有生两孩的意愿;主要基于一孩的性别期盼第二个孩子的性别;推崇晚婚晚育,接受生育第二个孩子的时间间隔为3⁴年;生育动机日益多元化。据此,提出了优化人口结构,实现人口稳定、合理增长的对策建议。     

基于股价预测的泛证券投资组合策略

本文基于期望效用最大化和L₁-中位数估计研究了在线投资组合选择问题。与EG（Exponential Gradient）策略仅利用单期价格信息估计价格趋势不同,本文将利用多期价格信息估计价格趋势,以提高在线策略的性能。首先,基于多期价格数据,利用L₁-中位数估计得到预期价格趋势。然后,通过期望效用最大化,提出一个新的具有线型时间复杂度的在线策略,EGLM（Exponential Gradient via L₁-Median）。并通过相对熵函数定义资产权重向量的距离,进而证明了EGLM策略具有泛证券投资组合性质。最后,利用国内外6个证券市场的历史数据进行实证分析,结果表明相较于UP（Universal Portfolio）策略和EG策略,EGLM策略有更好的竞争性能。     

Anti-hierarchical activism in Hong Kong: the post-80s youth

In 2009, a political youth movement known as the Post-80s emerged in Hong Kong to protest against the construction of a high-speed railway. While local academics and government officials framed the motivations of these youth protesters using economic rationales, I argue here that the Post-80s are better understood as conveying their dissatisfaction towards existing political structures in the city. This profile sets out Post-80s criticisms of the entrenched hierarchical dynamics in Hong Kong political culture that has shaped interactions between the government, political parties and the wider population, and discusses how the Post-80s have responded to the representational imbalances imposed by these hierarchical practices in the local political sphere by advocating for a way of doing politics where individual voices (as opposed to the collective) are emphasized, and where horizontal structures are used. I conclude by exploring the repercussions of this critique on recent political discourses and protests observed in Hong Kong.     

A powerful and efficient algorithm for breaking the links between aliased effects in asymmetric designs

Fractional factorial (FF) designs are no doubt the most widely used designs in experimental investigations due to their efficient use of experimental runs. One price we pay for using FF designs is, clearly, our inability to obtain estimates of some important effects (main effects or second order interactions) that are separate from estimates of other effects (usually higher order interactions). When the estimate of an effect also includes the influence of one or more other effects the effects are said to be aliased. Folding over an FF design is a method for breaking the links between aliased effects in a design. The question is, how do we define the foldover structure for asymmetric FF designs, whether regular or nonregular? How do we choose the optimal foldover plan? How do we use optimal foldover plans to construct combined designs which have better capability of estimating lower order effects? The main objective of the present paper is to provide answers to these questions. Using the new results in this paper as benchmarks, we can implement a powerful and efficient algorithm for finding optimal foldover plans which can be used to break links between aliased effects.     

Influencing behaviour: The mindspace way

The ability to influence behaviour is central to many of the key policy challenges in areas such as health, finance and climate change. The usual route to behaviour change in economics and psychology has been to attempt to ‘change minds’ by influencing the way people think through information and incentives. There is, however, increasing evidence to suggest that ‘changing contexts’ by influencing the environments within which people act (in largely automatic ways) can have important effects on behaviour. We present a mnemonic, MINDSPACE, which gathers up the nine most robust effects that influence our behaviour in mostly automatic (rather than deliberate) ways. This framework is being used by policymakers as an accessible summary of the academic literature. To motivate further research and academic scrutiny, we provide some evidence of the effects in action and highlight some of the significant gaps in our knowledge.