农村劳动力转移就业服务体系建设对策研究——以冀西北坝上地区为例

中国农业发展已进入新阶段,农村劳动力市场在面临难得的壮大机遇的同时也正经受着严峻的挑战。尤其对于地处偏僻,交通不便,文化落后,信息不灵的冀西北坝上地区,其长期面临着农村剩余劳动力总量大,学历低,就业能力差,农民生活水平低下的窘状。因此,提高冀西北坝上地区农村劳动力转移就业程度的关键是大力推进和不断完善转移就业服务体系建设,以尽快摆脱这一地区资源荒废,经济贫乏,乡民困苦的现状。     

An Asymmetric Shedding Dobby

UP to now all shedding dobbies used in China are of symmetrical type. But now we are manufacturing flexi-ble rapier looms as well as shuttle looms in mass produc-tion scale. They rather demand an asymmetric shedding dobby instead. The asymmetric shedding dobby intro-duced in this paper can meet this demand.     

把文本报表转化成数据库的方法与实现

报导一种把CCED文本表格转化成FOXPRO2．5b数据库的方法于与有关的程序．     

沥青路面结构设计是预防早期病害的关键

沥青砼路面具有良好的力学性能,在高速公路中广泛得到应用,但是早期出现病害也较为严重,文章结合实际主要从路面设计方面进行分析论述。     

Distributed synaptic modification in neural networks induced by patterned stimulation.

Activity-dependent changes in synaptic efficacy or connectivity are critical for the development, signal processing and learning and memory functions of the nervous system. Repetitive correlated spiking of pre- and postsynaptic neurons can induce a persistent increase or decrease in synaptic strength, depending on the timing of the pre- and postsynaptic excitation. Previous studies on such synaptic modifications have focused on synapses made by the stimulated neuron. Here we examine, in networks of cultured hippocampal neurons, whether and how localized stimulation can modify synapses that are remote from the stimulated neuron. We found that repetitive paired-pulse stimulation of a single neuron for brief periods induces persistent strengthening or weakening of specific polysynaptic pathways in a manner that depends on the interpulse interval. These changes can be accounted for by correlated pre- and postsynaptic excitation at distant synaptic sites, resulting from different transmission delays along separate pathways. Thus, through such a 'delay-line' mechanism, temporal information coded in the timing of individual spikes can be converted into and stored as spatially distributed patterns of persistent synaptic modifications in a neural network.     

高效液相色谱法测定乳粉中牛磺酸

用高效液相色谱法测定牛磺酸。在本色谱条件下，最低检出浓度０．０３ｇ／ｍｌ， 最低检出量为３ｘ１０－１０ｇ，符合测定乳粉中牛磺酸的需要。     

高校学报网络化是大势所趋

针对我国高校学报网络化程度低的现状，论述了高校学报网络化的重要意义及网络化对高校学报的积极影响，认为高校学报网络化是大势所趋。     

The Forecast and Regional Analysis of the Private Motor Vehicle Market in China

1　IntroductionThenumberofthemotorvehiclesownedbyindividuals(alsocalledprivatemotorvehicles)hasbeenincreasingsincethepolicywasmadetoallowsuchownershipinChinaintheearly1980s.ForaperiodfromthefoundationoftheP.R.Chinatotheearly1980s,onlystate-ownedorcol...     

PVC／PBA和PS／PBA两种LIPN的性能与相容性

通过对ＰＶＣ／ＰＢＡ（聚氯乙烯／聚丙烯酸丁酯）和ＰＳ／ＰＢＡ（聚苯乙烯／聚丙烯酸丁酯）两种ＬＩＰＮ的玻璃化转变温度Ｔｇ和动态力学等性能的测定，比较了它们的相容性和阻尼性能。实验结果表明ＰＶＣ／ＰＢＡＬＩＰＮ的相容性和阻尼性能较ＰＳ／ＰＢＡＬＩＰＮ更好     

扼流变压器容量的合理配置

在电气化铁道中，扼流变压器是强电与弱电的结合部分，合理而又科学地选择沿线扼流变压器的容量，对信号系统在强电干扰电磁环境下可靠工作，具有重大的实际意义。本论文在电气化铁道牵引回流分布、扼流变压器仿真及信号系统本身防干扰研究的基础上，提出了一套实现电气化铁道沿线扼流变压器合理配置的方法。