ANALYSIS ON GENETIC POLYMORPHISM OF 6 STR LOCI ON CHROMOSOME 12 IN CHINESE HAN POPULATION

Shorttandemrepeats(STRs)arearichsource ofhighlypolymorphicmarkersinthehumange nome,arerelativelysmallinsize,andcanbestud iedwiththerelativeexpediently.ThustheSTR polymorphismsarehighlyusefultoolsforlinkagea nalysisofdisease relatedgenesandconstructionthe …     

不均匀介质中声传播异常的应用研究

阐述了声异常因子、声传播异常的概念．讨论了声传播异常在研究不均匀介质中的传播损失、混响及水声设备作用距离等方面的应用．仿真与实验证明，声传播异常是表征不均匀介质中声传播条件的有效手段，利用声传播异常进行传播损失、混响计算，或者利用声传播异常改进声呐方程进行水声设备作用距离的预报均具有较高的准确性。是一种行之有效的方法．     

同步发电机整流系统稳定性的数学建模与实例分析

对具有反电势负载的同步发电机整流系统的静态稳定性进行了研究.将整流系统等效为一直流电路,建立了系统稳定性分析的数学模型,给出了系统在微扰条件下各量的变化情况,提出了同步发电机整流系统的稳定性判据,并通过实例对影响系统稳定性的参数进行了计算,绘制了系统稳定的参数范围曲线,分析了各参数对系统稳定性影响,全面地揭示了同步发电机整流系统的稳定性规律.     

ALTERATION OF HB-EGF IN PSORIATIC EPIDERMIS WITH THE TREATMENT OF RETINOID ACID

Retinoidacid (RA)bindingtoitsnuclearre ceptorscouldexertawidevarietyofprofoundef fectsininhibitingproliferationofepidermis ,induc ingdifferentiation ,maintainingthemorphologicalfeatureofnormaltissues ,influencingblastocystde velopment,formationoforgansandtumors .Psori asisischaracterizedbyabnormalkeratinocyteprolif eration ,terminaldifferentiationanddermalangio genesis .Heparinbindingepidermalgrowthfactor likegrowthfactor (HB EGF) ,asamemberofepi dermal growthfactor (EGF )family ,hasbeenpr…     

CA4DC共轨系统柴油机排放控制研究

通过引入共轨燃油喷射系统,重新优化发动机结构参数,标定控制参数,使CA4DC柴油机在降低油耗和燃烧噪声的同时,显著减少了NOx和微粒的排放。结果表明,在不采用外部EGR和后处理技术的条件下,采取上述措施完全可以使轻型柴油机的排放达到满足欧Ⅲ标准的工程目标。     

Modelling travellers’ route choice behaviours with the concept of equivalent impedance

Transportation - A novel concept is presented to capture route choice behaviours and to account for the correlation of routes in the logit model. The issue that route choice models are easily...     

混凝土拱涵的优化设计

针对常规混凝土拱涵材料用量大的问题，介绍了新颖的拱涵结构形式，应用遗传算法对拱涵的轴线进行了优化设计，得到受力合理的拱轴线坐标，拱圈各截面弯矩均比较小，使涵洞结构简单，施工方便，达到节省材料、加快施工速度、降低工程造价的目的。     

部海事局党组书记许如清为杨庆文事迹陈列馆揭牌

7月13日下午，在广州海事局二楼杨庆文事迹陈列馆，部海事局党组书记许如清在广东海事局党组书记刘恒伟、副书记杨文以及杨庆文妻子的陪同下，共同为杨庆文事迹陈列馆揭牌。     

On the security of multivariate hash functions

Multivariate hash functions are a type of hash functions whose compression function is explicitly defined as a sequence of multivariate equations. Billet et al designed the hash function MQ-HASH and Ding et al proposed a similar construction. In this paper, we analyze the security of multivariate hash functions and conclude that low degree multivariate functions such as MQ-HASH are neither pseudo-random nor unpredictable. There may be trivial collisions and fixed point attacks if the parameters of the compression ftmction have been chosen. And they are also not computation-resistance, which makes MAC forgery easily.     

杨庆文被追认为中国共产党党员

7月1日上午，广州海事局隆重召开纪念建党八十八周年表彰暨追认杨庆文为中国共产党党员大会。会上，广州市委组织部领导宣布了追认杨庆文为中国共产党党员的决定。