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Based on the definition of Boolean function on set and positive extension, The sufficient and necessary condition of PBF is proven. At last, an algorithm of generating MSP expression of stack filter positive Boolean function is presented taking advantage of Hasse diagram.

通过定义布尔函数开、闭集和最小项正、负扩展，证明了布尔函数具有层叠性的充要条件是布尔函数开集的正扩展或闭集的负扩展具有不变性，在此基础上，提出了一种通过Hasse图确定层叠滤波器最简正布尔函数的算法。

Based on the definition of Boolean function on set and positive extension, The sufficient and necessary condition of PBF is proven. At last,an algorithm of generating MSP expression of stack filter positive Boolean function ispresented taking advantage of Hasse diagram.

通过定义布尔函数开、闭集和最小项正、负扩展，证明了布尔函数具有层叠性的充要条件是布尔函数开集的正扩展或闭集的负扩展具有不变性，在此基础上，提出了一种通过Hasse图确定层叠滤波器最简正布尔函数的算法。

Superficial siderosis is a rare condition consisting of deposition of hemosiderin on the leptomeninges, as well as on the surface of the brain, cerebellum, brain stem and cranial nerves.

中枢神经系统表面含铁血黄素沉积症是含铁血黄素沉积于软脑膜及大脑、小脑、脑干、颅神经表面的一种罕见疾病。

Aim to investigate the effects of UVB on the procession of cell cycle and apoptosis. And observe the protective effects of VE against UVB radiation. And to study the expression of related gene p53, bcl-2 on hereinbefore condition.

研究UVB对细胞周期的进程和细胞凋亡情况，并研究了维生素E对紫外照射的保护作用以及相关基因p53和bc1-2在这些作用下的表达。

Contrary " hoggish sex " the fundamental sex principle that regards the market as economy, still have huge progress effect in construction of socialist market economy, because this wants to be developed in meaning of chip in of condition of socialist market economy on one hand " hoggish sex " with collectivistic enthusiasm respect, want to pay close attention to its limitation and ruinous one side on the other hand, those who realize the productivity development that promotes socialism and thought morality level to rise is double win.

相反"利己性"作为市场经济的基础性原则，在社会主义市场经济建设中仍具有极大的进步作用，因此一方面要在社会主义市场经济条件下注意发挥"利己性"和集体主义的积极性方面，另一方面要关注其局限性和破坏性的一面，实现推动社会主义的生产力发展和思想道德水平提高的双赢。

Since hold water, faddish immerse oneself in the research and development at P2P technology core all the time, in NAT penetrable, resource attempers, distributed node all mastered a large number of patent skills on the core technology such as fixed position algorithm, technology of order programme of long-term P2P video is accumulated, rose to transcend the technical barrier that video of long, high-definition clear broadcasts when short amortize for faddish vertical stroke, created a condition to put high-definition video on advertisement.

自成立以来，风行一直埋头于P2P技术核心的研发，在NAT穿透、资源调度、分布式节点定位算法等核心技术上均掌握了大量专利技术，长期P2P视频点播技术积累，为风行竖起了超短缓冲时长、高清晰视频播放的技术壁垒，为投放高清视频广告创造了条件。

This paper is based on the features of technics structure, operation condition, import and export boundary conditions, characteristics of medium of petrochemical pipeline and so on. The simulative computational theory and model of multiphase flow are established according to the method of CFD to analyse the hydrokinetics redical factors that can affect the pipe erosion damage of multiphase flow.

本文针对石化管道的工艺结构、运行工况、出入口边界条件和工艺介质特性等特点，基于计算流体力学的方法对多相流进行仿真理论计算及模型建立，以此来分析影响管内多相流冲蚀破坏的流体动力学关键因素。

Based on the effect of factors on milk hydrolyte flavor,RSM experiments were carried out,evaluated by free fatty acids content,to optimize the hydrolysis condition.

酶法水解制备奶味香精是以奶油做原料，利用酶解技术将奶油在一定条件下进行水解以增香巧0一250倍，产生具有奶香特征的化合物。

Finally, we propose a method on general numerical simulation for Hanyuan intensity anomaly, which is based on the summary and the refinement of damage characteristics, and with the consideration of hypocenter mechanism, crust media and nonlinear site condition.

为此作者提出，应在震害特征总结提炼的基础上，考虑震源机制、地壳介质、场地非线性等因素，对汉源烈度异常区进行全面的数值模拟，进一步确定汉源地震烈度异常的机理。

In this paper the key points discussed were that, under the condition of a sharp hypsography of desert areas of Ordos basin, we used some new geophysical methods in the investigation of surface structure to obtain high accurate surface structure data and provide reliable scientific foundation for data acquisition and process; we dealt with the optimum coupling of surface geophones and the digital realization technique in desert areas, dug into a method of high frequency compensation according to attenuations by absorption near surface, adopted data processing and correction technique, solved high frequency attenuation and geophone coupling, eliminated the influences of sharply transverse fluctuation of hypsography in desert area on the seismic data, enhanced the fidelity and SNR of seismic section, and finally picked up more geologic information on the seismic profile and improved the precision of the lateral prediction for the reservoir beds.

本文旨在研究鄂尔多斯盆地沙漠区地表变化比较大的情况下，在表层结构调查中通过应用一些地球物理新方法，以获取高精度的表层结构数据，为资料采集和数据处理提供更科学的依据；研究在沙漠区地表检波器最佳耦合的方式与数字实现技术，研究通过近地表的吸收衰减规律进行高频补偿的方法，采用数据处理校正技术，解决高频吸收及检波器耦合，消除沙漠区表层横向剧烈变化对地震资料的影响，提高地震剖面的保真度和信噪比，从而使更多的地质信息能够从地震剖面中反映出来，提高储层横向预测的精度。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。