The spf on a sunscreen lotion only tells us the time extension before a person gets burnt by uvb . a standard has yet to be developed for protection against uva , although the pa protection grade of uva is usually used . there are 3 pa grades : pa , pa , and pa , with each additional plus indicating a higher protection 太阳油的spf值只反映延迟皮肤受紫外线b晒伤的能力，有关紫外线a的防护，现时仍未有统一指标，比较普遍是以pa protection grade of uva值来表示，此指标分为三级： pa pa和pa ，加号愈多代表防晒效能愈高。
Using the new technique , the zero , the first and the second differential pas of some persons " blood was measured , the result shows : the new technique is more sensitive than the common pas technique . the pas of many persons " blood has absorption peak around the wavelength of 637nm and 664nm 并用导数光声光谱技术测量了各种人血的零阶，一阶，二阶导数，实验表明：导数光声光技术比普通光声吸收光谱技术具有更高的检测灵敏度；许多人的血液的光声谱在637nm和664nm附近有吸收峰。
On the basis of a thorough and systemic analysis , this thesis research questions of actual pa from theoretic method and attempt to explore a new method which analyze the pa ' s factors more thoroughly . appraisal quota system , proportion system and appraisal method are all according as the scientific results . this dissertation discuss and analyze the theoretic foundation , confirming the quota and proportion system , methods of evaluation and operation 本文在对绩效考核进行全面系统分析的基础上，试图从绩效考核的理论和方法入手，结合目前的绩效考核中存在的实际问题进行了深入的分析，并尝试着探索出一种能够更加系统地、全面地分析影响考核因素的理论方法，以作为确定考核指标体系、权重体系及考核方法的科学依据。
Under the conditions of operation pressure about 0 . 5mpa and feed temperature 25 c , the rejection performance of nacl feed solution ( 500ppm ) , is about 35 % , while the flux is about 45ml cm - 2 h - 1 . the pa membranes were prepared by interfacial polymerization , usingl , 3 , 5 - benzenetricarbonyltrichlori2 , 4 - dichloroterephthalaldehyd e , 1 , 3 - phenylenediamine as monomers 研究结果表明， 5102 / a12o :无机复合超滤膜的研制原料正硅酸乙酷、乙醇、水、 n ， n一二甲基甲酸胺( dcca )和hno3之间的配比、涂膜过程、热处理温度等直接影响着溶胶的质量和膜的性能。
Combining with the deep investigation and analysis on the current situation of the employee appraisal in the guidian middle inc . , the article on the basis of job analysis study emphatically the method , the criterion and the index of pa of general administrative staff , construct the pa system with the objectivity , practibility , scientific as the characteristic , and develop the pa system used to actual operation 本文通过对贵州贵电实业总公司(贵电实业)人事考核现状进行深入的调查与分析，以工作分析为基础，着重研究了公司中层管理人员的绩效考核方法、考核标准及考核指标，建立了以客观性、实用性、科学性为特征的绩效考核体系，并开发了可用于贵电实业实际运作的绩效考核系统。
This thesis describes the properties of millimeter wave , and development of the millimeter wave sources nowadays , and introduces the solid - state devices impatt diodes , and analyses the technology of the injection locked . then this thesis gives out how to design the pa module in detail . and practical circuit is given out with the test result and analyses 本文首先综述了毫米波特点,毫米波源的发展现状,介绍了w波段impatt器件的基本工作原理,分析毫米波波导电路中的注入锁定技术,给出实现连续波或脉冲功率放大的w波段信号源的功放模块的技术方案、测试结果和综合分析。
This paper takes two similar works by the italian writer eco as its framework of reference and tries to investigate into the " self - construction of the discourse producer . " based on the biblical narrative and relevant interpretations in western arts , it attempts to return to the symbolic system that made the novel the pa vinci code possible , analyses the changes , misreading and extension of meanings , and finally reseals the tension between the " spiritual expression " and the symbolic codes 本文以义大利学者艾柯的两部类似作品为参照，对这种“话语生产者的自我建构”予以考察；并试图以《圣经》 ?述与西方艺术的相关论释为据，回到《达?芬奇密码》所借助的象徵符号系统，解析其中的演变、误读以及意义延伸，从而揭示“精神表达”与象徵符号之间的张力。
In the pa research about agriculture aspect , how the related agricultural crops create the achievements with to enhance subject and profit , many findings with emphasis would put on “ the output ” and “ the quality ” the level surface consideration , not need doubt , in the contemporary society , the light was improves the farmer income , the rural development and the creation agricultural product profit achievements from the output and the quality angle of view , nothing but was unidirectional also lacks the substantive valid strategy pattern 摘要在过去许多农业方面相关的研究中，有关农业产业如何创造绩效与提高利润等议题，不少研究结果均将重点放在产量与品质的层次面考量，不可否认的是，在当代的社会里，光是从产量与品质的视角来改善农民收益、农村发展与创造农产品利润绩效，无非是单向度且缺乏实质有效性的策略模式。
