用无压烧结工艺,在1500-1750℃制备了含氮稀土黄长石固溶体R2Si3-xAlxO3+xN4-x(R=ND,Dy,x=0,0.3,0.6,1.0;R=Yb,x=0,0.3),配料组份在这些温度下的反应行为,结果表明,从轻稀土Nd至重稀土Yb,均能生成黄长石或它的固溶体,它们的含量随烧结的提高而增加,但稀土黄
资产负债表需增列“本年利润”行次洪尚仁乡镇企业新旧财会制度的转轨衔接工作已随着93年度财务决算的结束而告竣,94年度新帐制已经建立,结合自身建新帐的的实践,考虑到报表必须准确
Looking for ways to establish solid links between Complexity Sciences and Economics, new evidence comes in form of studies that can serve to validate models as
The field experiments were conducted at the experimental farm of Faculty of agricultural, southern Illinois University SIUC, USA. The project makes the irrigati
<正> 贵刊1993年第3、10期,1996年第9期,1997年第8期,1998年第8期共刊登了近80种“炒鱿鱼”的表达方法,今再以如下30种表达方法续之,以供参考:
In this paper, we present a generalization of the commonly used growth models. We introduce Koya-Goshu biological growth model, as a more general solution of th
In this article, we derive a boundary element formulation for the pricing of barrier option. The price of a barrier option is modeled as the solution of Black-S
研究了特定领域创新性(划分为信息拥有创新性和产品拥有创新性)对消费者新产品采用的影响,以及感知有用性的中介作用、自我品牌联结和参考群体的调节作用。研究发现:信息拥有
Simulators are generally used during the design of computer architectures. Typically, different simulators with different levels of complexity, speed and accura
利用2000—2015年中国21个城市的面板数据,检验了高技术人员的流入对城市内部收入差距的影响效应。结果表明:高技术人员的流入会同时增加高收入家庭和低收入家庭的收入,其中对