SIF creates a security context object, which is a placeholder for security-related information.
SIF创建了一个安全上下文对象，这是一个与安全相关的信息的占位符。
SIF checks whether a session object exists and contains a security context.
SIF将检查是否存在一个会话对象，以及它是否包含安全上下文。
IF the session object does not exist, SIF creates a new security context and puts it in the security context holder.
如果不存在会话对象，SIF将创建一个新的安全上下文，并将它放到securitycontext holder中。
How SIF creates a security context?
SIF如何创建一个安全上下文？
IF SIF finds that this is the first time it has been called during the given Web request, it sets a flag, which will be used next time to indicate that SIF has been called.
如果SIF发现这是第一次对这个Web请求调用SIF，它将设置一个标记，将在下一次使用该标记，以表示曾经调用过SIF。
Their results showed a more rapid rate of increase in the dynamic sif for blunt than for sharp notches.
它们的结果表明：钝切口比尖锐切口的动态应力强度因子增长率更快。
The SIF decreases with the friction coefficient rising when the surface crack tip lies in the base and the reflective crack length is more than a certain value.
反射裂缝裂尖位于面层中且裂缝长度大于某一值时，应力强度因子随着摩擦系数的增加而减小。
The swelling ratio and drug release rate of citrate cross-linked chitosan in SGF was much more quick than that in SIF, so these film may be used as a drug carrier in the stomach.
柠檬酸根交联壳聚糖膜在SGF中的溶胀以及药物的释放速率比在SIF大得多，这表明这些膜有望作为胃部给药的控释载体。
The risks and advantages of SIF as a speculative instrument will be highlighted.
SIF中的风险和优点，作为投机工具将凸显。
The coupled way with globular lens in end side of step index fiber(SIF) is a simple and practical method to increase the coupling efficiency between semiconductor optical resource and SIF.
采用光纤端面球透镜耦合方式，是提高半导体光源与阶跃折射率光纤之间耦合效率的简单实用的方法。
While with a composite patch, there exists coupling effect between the normal stress parallel to crack and the SIF, and the coupling effect is significantly dependent on ply orientation of the patch.
而裂纹板经复合材料补片胶接修补后，平行于裂纹方向的拉压应力对裂纹尖端的应力强度因子具有耦合效应，并且这种耦合效应的大小与补片的铺层含量有很大的关系。
Finding the small ganglia of SIF cells, that their structure is more perfect, will provide a new lead for studying the function of the SIF cells.
在人椎前节发现结构更为完善的SIF细胞小节，将为进一步探讨SIF细胞的功能提供新的线索。
The SIF and its correction factor of the transverse surface semi-elliptic crack of a photoelastic axle are tested and studied with the method of three dimensional photo-elastics.
通过三维光弹实验测定了轴表面横向半椭圆裂纹的应力强度因子（SIF），并计算了与光弹轴裂纹几何及当地应力相对应的无限大体的SIF，从而求得SIF修正系数。
In 2008, the Stock Index Future (SIF) and the short sale will launch in China. They will have a great meaning for the security market.
股指期货和卖空交易机制是2008年中国金融市场将要推出的两项重要内容，对于市场不断走向成熟具有里程碑意义。
An energy difference rate method (EDRM) is applied to establish a closed form solution (CFS) about stress intensity factor (SIF) of three dimensional finite bodies containing inclined embedded cracks.
采用能量差率方法，首次导出含偏轴裂纹三维有限大体应力强度因子封闭解。
Thirdly, the transaction costs for trading SIF contracts will not be proportional to the contract value. Instead, it will be a flat fee per contract for a round trip.
第三、期货的交易费用与合约的价值无关，而是按买卖合约数目收费的。
Without the patch, a tensile or compressive stress parallel to the crack would have no effect on the SIF at the crack tip.
没有补片时，平行于裂纹方向的拉压应力对裂纹尖端的应力强度因子没有影响。
Without the patch, a tensile or compressive stress parallel to the crack has no effect on the SIF at the crack tip. While with a…
没有补片时，平行于裂纹方向的拉压应力对裂纹尖端的应力强度因子没有影响。
Stock Index Futures (SIF) contracts have been around for over 15 years. Institutional investors are familiar with such a product. The targeted readership of this series is the small investor.
由于机构投资人对股价指数期货都已经很熟悉，本系列的对象是小投资人，系列之二以假想的例子说明如何利用股价指数期货投机。
Stock Index Futures (SIF) contracts have been around for over 15 years. Institutional investors are familiar with such a product. The targeted readership of this series is the small investor.
由于机构投资人对股价指数期货都已经很熟悉，本系列的对象是小投资人，系列之二以假想的例子说明如何利用股价指数期货投机。
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