解析中国企业的防反倾销策略

面对逐年增多的反倾销调查，中国出口企业应理性对待。价格不是决定市场竞争力的惟一因素。企业应当努力提高产品的质量．技术含量，品牌效应等非价格竞争力。此外，出口市场多元化和对外直接投资也是企业规避反倾销风险的可选策略。     

二阶微分方程解的增长性

研究了P(z)，Q(z)为多项式，A0(z)，A1(z)，D0(z)，D1(z)为整函数时，方程f^H (A1(z)e^P（z） D1)f’ (A0(z)e^Q(z) D0)f=0的解的增长性质．     

A new research on auto compatible default theory

Ｅｘｔｅｎｓｉｏｎｉｓｔｈｅｍｏｓｔｉｍｐｏｒｔａｎｔｃｏｎｃｅｐｔｉｎｄｅｆａｕｌｔｌｏｇｉｃ．Ｒｅｉｔｅｒｈａｄｍａｄｅｓｏｍｅｒｅｓｅａｒｃｈｏｎｔｈｅｓｐｅｃｉａｌｋｉｎｄｏｆｄｅｆａｕｌｔｌｏｇｉｃ,ｔｈａｔｉｓｎｏｒｍａｌｄｅｆａｕｌｔｌ...     

Systematic studies on the neotropical genus Fusaea (Baill.) Saff.(Annonaceae)

ＴｈｅｇｅｎｕｓＦｕｓａｅａｗａｓｆｏｕｎｄｅｄｂｙＳａｆｏｒｄ［１］ｉｎ１９１４．ＴｈｅｔｙｐｅｓｐｅｃｉｅｓＦ．ｌｏｎｇｉｆｏｌｉａｗａｓｏｒｉｇｉｎａｌｙｄｅｓｃｒｉｂｅｄｂｙＡｕｂｌｅｔ［２］ａｓＡｎｎｏｎａｌｏｎｇｉｆｏｌｉａ．Ｂａｉｌｏ...     

QUALITATIVE ANALYSIS FOR A THIRD-ORDER DIFFERENTIAL EQUATION IN A MODEL OF CHEMICAL SYSTEMS

In this paper a mathematical model of chemical systems is investigated.We present the conditions for the existence and local stability of the steady statesand the periodic solution of the Hopf type.Specifically,we show by using an ana-lytical method that there may exist two or four Hopf bifurcation points separatedat a finite distance from each other;at the same time,a technique for studying theHopf bifurcation value is given.     

基于小波变换的随钻测试数据降噪方法研究

为消除随钻测试装置采集信号中的噪声,给工程人员提供准确的现场信息,提出了基于小波变换的方法对随钻测试数据进行降噪处理。首先,根据含噪声的随钻测试数据模型建立起小波变换降噪的基本流程。其次,在对含噪信号的小波变换特性分析的基础上,运用自相关函数对其在小波变换尺度空间中进行白噪声检验,确定小波最优分解层数。在分析对比小波降噪阈值的不同选取方式后,采用广义交叉确认理论来计算最优降噪阈值,从而在对信号降噪的同时还最大程度地保留了信号的有效特征成分。最后给出了基于该方法小波变换的随钻测试数据降噪的详细步骤,对实测的钻压和扭矩数据进行了小波降噪,取得了良好的降噪效果,为钻井工程后续分析提供了可靠的数据支撑,证明了本方法的优越性。     

Rapid solidification of acoustically levitated Al-Cu-Si eutectic alloy under laser irradiation

Al-27%Cu-5.3%Si ternary eutectic alloy was melted using a YAG laser and then solidified while being acoustically levitated. A maximum undercooling to 195 K (0.24 TL) was achieved with a cooling rate of 76 K/s. The solidification microstructure was composed of (Al+θ+Si) ternary eutectics and (Al+θ) pseudobinary eutectics. During acoustic levitation, the (Al+θ+Si) ternary eutectics are refined and the (Al+θ) pseudobinary eutectics have morphological diversity. On the surface of the alloys, surface oscillations and acoustic streaming promote the nucleation of the three eutectic phases and expedite the cooling process. This results in the refinement of the ternary eutectic microstructure. During experiments, the reflector decreases with increasing alloy temperature, and the levitation distance always exceeds the resonant distance. Because of the acoustic radiation pressure, the melted alloy was flattened, and deformation increases with increasing sound pressure. The maximum aspect ratio achieved was 6.64, corresponding to a sound pressure of 1.8×104 Pa.     

DNA damage stress induces the dissociation of Smurf1/2 from MDM2 in a slow manner

The tumor suppressor p53 locates at the key point of cell growth or apoptosis balance, and the expression level of p53 is tightly controlled by ubiquitin ligases including MDM2. Upon DNA damage stresses, p53 was accumulated and activated, leading to cell cycle arrest or apoptosis. We previously showed that Smad ubiquitylation regulatory factor 1/2 (Smurf1/2) promotes p53 degradation by interacting with and stabilizing MDM2, and consequently enhancing MDM2-mediated ubiquitylation of p53. However, it is uncle...     

太原市土地非农化与经济增长关系研究

利用历年的土地及经济统计资料,对非农化与经济发展的相关关系、非农化与GDP增长的弹性系数、非农化对产业结构的影响及其变化进行的定量分析.     

Gastric vagal afferent inputs reach the glycemia-sensitive neurons of lateral hypothalamic area in the rat

The lateral hypothalamic area (LHA) is one of the most important central areas in the regulation of feeding behavior[1]. The glycemia-sensitive neurons within the LHA sense the blood glucose level and subsequently trig-ger various visceral and somatic responses for maintaining the homeostasis of blood glucose concentration. Some electrophysiological studies have demonstrated that the gastric vagal afferent inputs could reach the LHA in the cat[2,3], but the studies did not reveal whether th…