منابع مشابه
modeling loss data by phase-type distribution
بیمه گران همیشه بابت خسارات بیمه نامه های تحت پوشش خود نگران بوده و روش هایی را جستجو می کنند که بتوانند داده های خسارات گذشته را با هدف اتخاذ یک تصمیم بهینه مدل بندی نمایند. در این پژوهش توزیع های فیزتایپ در مدل بندی داده های خسارات معرفی شده که شامل استنباط آماری مربوطه و استفاده از الگوریتم em در برآورد پارامترهای توزیع است. در پایان امکان استفاده از این توزیع در مدل بندی داده های گروه بندی ...
Regulation of motor neuron dendrite growth by NMDA receptor activation.
Spinal motor neurons undergo great changes in morphology, electrophysiology and molecular composition during development. Some of this maturation occurs postnatally when limbs are employed for locomotion, suggesting that neuronal activity may influence motor neuron development. To identify features of motor neurons that might be regulated by activity we first examined the structural development...
متن کاملRegulation of dendrite growth and maintenance by exocytosis.
Dendrites lengthen by several orders of magnitude during neuronal development, but how membrane is allocated in dendrites to facilitate this growth remains unclear. Here, we report that Ras opposite (Rop), the Drosophila ortholog of the key exocytosis regulator Munc18-1 (also known as STXBP1), is an essential factor mediating dendrite growth. Neurons with depleted Rop function exhibit reduced t...
متن کاملVISCOUS NUTATION DAMPER, MODELING AND ANALYSIS
In some aerospace vehicles, the tracking sensors which act in a tracking loop as stabilizer are mounted on a two degree of freedom gyro. The gyro must align its rotor axis with the line of sight in order to remove tracking errors. The tracking precision and sensitivity are functions of the gyros performance. One of the main factors in reducing the precision and producing instabilities is nutati...
متن کاملCalcium Signals Control Wnt-Dependent Dendrite Growth
Activity-dependent dendritic growth is dependent upon intracellular calcium signaling. Yet the specific mechanisms by which calcium signals lead to morphologic changes in dendrites are not well understood. A paper in this issue of Neuron by Wayman et al. describes a novel calcium-dependent signaling cascade linking neuronal activity and calcium influx to expression of Wnt-2, a member of a famil...
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ژورنال
عنوان ژورنال: Journal of the Japan Institute of Metals and Materials
سال: 1990
ISSN: 0021-4876,1880-6880
DOI: 10.2320/jinstmet1952.54.10_1106