教材语言调查统计方法的新发展——基于基础教育新课标人教版、苏教版、北师大版、语文版的比较

对于任何一门科学而言,其成熟的主要标志是研究方法的科学化、系统化。在教材语言研究的过程中,开始我们多使用频次、文本数和分布率、累计频率等统计方法。由于教材语言具有基础性、有限性和有序性的特点,我们进一步提出教材语言统计的新方法,即复现调查法、使用度调查和频率差等教材语言统计方法。调查方法的发展和演进,有助于我们对教材语言的特点、性质和面貌有更进一步的认识

混沌激光对非本征光导型探测器的混沌干扰机制

在唯象理论和二能级模型下，根据级联非线性系统原理，通过求解载流子输运动力学方程的Lyaponov指数，对混沌激光辐照下非本征光电导的混沌干扰机制进行了研究。结果表

单泵浦双输出光生太赫兹辐射方法及其产生装置

本发明提供一种单泵浦双输出光生太赫兹辐射方法及其产生装置，以解决现有光生太赫兹辐射技术中辐射输出位置单一、设备结构复杂、成本较高且稳定性较低的问 题。本发明是基于两个参量下转换过程的THz波产生系统和一个参量下转换的THz波长检测系统，该产生系统包括泵浦源同时泵浦THz波参量振荡器，THz 波参量发生器和THz波长检测系统，THz波参量振荡器产生的信号光为THz波参量发生器提供差频用信号光，THz波参量振荡器和THz波参量发生器同时 输出波长同步变化的同为闲频光的THz波，达到单泵浦源双太赫兹波输出的目的，并通过THz波长检测系统反馈控制THz波参量振荡器，达到控制双输出的 THz波长的目的

亚微米波导型Ge量子阱电光调制器

 一种亚微米波导型Ge量子阱电光调制器,包括：一SOI衬底,该SOI衬底包括一硅衬底,一制作在硅衬底上的二氧化硅层和制作在二氧化硅层上的硅波导层,该硅波导层的宽度小于二氧化硅层的宽度；一缓冲层,该缓冲层制作在SOI衬底上面的硅波导层的中间部位,该缓冲层的长度小于硅波导层的长度；一虚衬底,该虚衬底制作在缓冲层上；一有源区,该有源区制作在虚衬底的上面；一盖层,该盖层制作在有源区的上面,所述的缓冲层、虚衬底、有源区和盖层构成调制区,该调制区和SOI衬底上的硅波导层的宽度均为亚微米量级

Negative Press Coverage,Litigation Risk and Audit Fees

本文研究媒体负面报道对审计收费的影响,并进一步探讨这种影响的实现路径。利用2001-2009年我国A股主板上市公司的数据研究发现,公司面临的媒体负面报道越多,审计收费越高。进一步分析发现,会计方面的媒体负面报道和首次媒体负面报道会引起审计师提高审计收费,然而这些影响均只存在于高诉讼风险的环境下。此外,本文还发现,无论是高风险阶段还是低风险阶段,媒体负面报道都会使公司容易受到监管部门的行政处罚。本文可能表明,在转型经济中,媒体对审计行为的治理作用可能需通过法律环境的改善来实现。The paperstudies the effect of negative press coverage on audit fee,and further explores the path to achieve this effect.Employing China's A shares mainboard data from 2001 to 2009,we find that the more negative press coverage companies encounter,the higher audit fee auditors charge.Further analysises express that negative press coverage in accounting and first- reported negative press coverage brings about higher audit fees charged by auditors while that only occurs in the high litigation risk period.In addition,whether during the low or high litigation risk period,negative press coverage will bring companies regulatory sanctions more likely.The paper suggests that governance role of the media in audit may be achieved by improving legal environment in transition economy.国家自然科学基金海外及港澳学者合作研究基金项目(71328201); 面上项目(71172206)的中期成果之

掺杂对PZT陶瓷性能的影响

在功能陶瓷的队伍中，压电陶瓷是非常重要的一类成员，应用于工业、军事、科技、医疗等领域。文中从改性机理开始讨论，叙述了不同掺杂元素和掺杂位置对PZT陶瓷压电、铁电性能等性能的影响，并对其发展方向进行了展望。</jats:p

Effects of seawater acidification and Cu~(2+) exposure on nutrient assimilation and energy allocation of Cladocopium goreaui

Recently, environmental stress due to global climate changes and human activities has exacerbated the occurrence of coral reef bleaching events. Ocean acidification and copper pollution have become the main stressors in reef areas. In this study, exposure experiments were performed at two pH levels (8.1 and 7.6) and two Cu~(2+) levels (4.25 and 16.47 mug/L) to explore the effects of seawater acidification and Cu~(2+) exposure on nutrient assimilation, energy consumption, and allocation of Cladocopium goreaui. Short-term seawater acidification exposure was found to increase the nutrient assimilation (carbohydrate and protein content) and decrease the energy consumption of C. goreaui, thereby increasing its energy allocation. Meanwhile, Cu~(2+) exposure significantly increased the energy consumption of C. goreaui, thereby reducing its energy allocation. Further, compared with the Cu~(2+) exposure alone, the combination of seawater acidification and Cu~(2+) exposure promoted the nutrient assimilation (increased carbohydrate and protein content) and energy allocation of C. goreaui. In general, these results show that seawater acidification and Cu~(2+) pollution in reef areas could negatively affect the nutritional metabolism and energy allocation of C. goreaui, possibly affecting its growth and reproduction in the future