12316三农热线

<正>12316是农业部在全国启用的农业系统公益服务统一专用代码。是为维护农民合法权益,方便广大农民群众投诉举报和技术咨询,方便农业部门提供"三农"信息服务而专门设立的。根据农业部的部署要求,山东省农业厅建成开通了山东省12316三农热线、12316短信平台和12316视频连线服务。每天中午12:00~13:00,济南调频91.9,青岛调频94.4,淄博中波1251,德州中波1251,烟台调频96.9,潍坊调频103,济宁中波999,聊城中波621,泰安调频91.9,滨州调频99.8,菏泽调频96.5,山东广播乡村频     

12316三农热线(8则)

<正>12316是国家农业部在全国启用的农业系统公益服务统一专用代码。是为维护农民合法权益,方便广大农民群众投诉举报和技术咨询,方便农业部门提供"三农"信息服务而专门设立的。根据农业部的部署要求,山东省农业厅建成开通了山东省12316三农热线、12316短信平台和12316视频连线服务。每天中午12:00~12:30,济南调频91.9,青岛调频94.4,淄博中波1251,德州中波1251,烟台调频96.9,潍坊调频103,济宁中波999,聊城中波621,泰安调频91.9,滨州调频99.8,菏泽调频96.5,山东广     

12316三农热线(6则)

12316是国家农业部在全国启用的农业系统公益服务统一专用代码。是为维护农民合法权益,方便广大农民群众投诉举报和技术咨询,方便农业部门提供"三农"信息服务而专门设立的。根据农业部的部署要求,山东省农业厅建成开通了山东省12316三农热线、12316短信平台和12316视频连线服务。每天中午12:00~13:00,济南调频91.9,青岛调频94.4,淄博中波1251,德州中波1251,烟台调频96.9,潍坊调频103,济宁中波999,聊城中波621,泰安调频91.9,滨州调频99.8,菏泽调频96.5,山东广播乡村频道《12316三农热线》欢迎您的收听。     

12316三农热线

<正>12316是农业部在全国启用的农业系统公益服务统一专用代码。是为维护农民合法权益,方便广大农民群众投诉举报和技术咨询,方便农业部门提供"三农"信息服务而专门设立的。根据农业部的部署要求,山东省农业厅建成开通了山东省12316三农热线、12316短信平台和12316视频连线服务。每天中午12:00~13:00,济南调频91.9,青岛调频94.4,淄博中波1251,德州中波1251,烟台调频96.9,潍坊调频103,济宁中波999,聊城     

“12316三农热线”栏目由山东省农业厅和山东省广播电视台联合主办

<正>12316是农业部在全国启用的农业系统公益服务统一专用代码。是为维护农民合法权益,方便广大农民群众投诉举报和技术咨询,方便农业部门提供"三农"信息服务而专门设立的。根据农业部的部署要求,山东省农业厅建成开通了山东省12316三农热线、12316短信平台和12316视频连线服务。每天中午12:00~13:00,济南调频91.9,青岛调频94.4,淄博中波1251,德州中波1251,烟台调频96.9,潍坊调频103,济宁中波999,聊城     

农村广播规划建设思路

无线调频广播信号以电磁波形式在空中传输,在县台发射覆盖45%的乡镇终端利用调频无线广播接收,安装5-10W无线调频音箱放音.前端加入数字可寻址收、发遥控技术,在播控器音频信号输出端到发射机之间加入一个可寻址的数字编码器.     

12316三农热线(6则)

<正>12316是国家农业部在全国启用的农业系统公益服务统一专用代码。是为维护农民合法权益,方便广大农民群众投诉举报和技术咨询,方便农业部门提供"三农"信息服务而专门设立的。根据农业部的部署要求,山东省农业厅建成开通了山东省12316三农热线、12316短信平台和12316视频连线服务。每天中午12:00~13:00,济南调频91.9,青岛调频94.4,淄博中波     

基于压缩感知的农田温度信息处理

由于农田温度信息在离散余弦基(DCT)下的近似稀疏性,采用压缩感知(CS)技术对每块农田温度信息进行压缩和重构,即将温度信息投影到随机高斯观测矩阵,在接收端通过OMP算法重构出每块农田的温度信息.仿真试验结果表明,在较为稳定的网络环境中,CS算法能够以较少的观测值实现对原始信号的精确重建,降低节点能耗,延长网络生命周期.     

基于MODIS的四川省干旱遥感监测不同方法的比较

针对四川省干旱的特点,以中分辨率成像光谱仪(MODIS)数据为基础,选择温度植被干旱指数法(TVDI)、植被供水指数法(VSWI)、温差植被干旱指数法(DTVDI)三种算法进行比较。首先对数据进行预处理,获取指数信息和地表温度信息,然后利用获取的信息进行分析与计算,最后将这三种方法的干旱指标与实测土壤含水量进行线性相关分析,得到最适合四川省的干旱遥感监测算法。结果表明,TVDI的效果最好,DTVDI和VSWI次之。     

基于红外的新型高压开关柜热点温度实时检测与预警系统设计

针对目前高压开关柜热点温度实时检测困难和传统通信方式无法实现信号传输从而无法预警的问题,采用无线红外通信技术,设计了一种新型高压开关柜热点温度实时监测与预警系统.该系统主要由红外检测、红外通信、预警3个部分组成,对系统方案设计进行了详细阐述.通过理论分析,设计出了检测端微弱信号放大电路、接收端信号拾取放大电路;通信方式采用PFM方波调频方式.实验结果表明,温度信号传输正常,无失真,实现了实时温度检测、信号传输与预警.     

Mantle discontinuity structure beneath the southern east pacific rise from P-to-S converted phases

Receiver functions derived from teleseismic body waves recorded by ocean-bottom seismometers on the southern East Pacific Rise reveal shear waves converted from compressional waves at the mantle discontinuities near 410- and 660-kilometer depth. The thickness of the mantle transition zone between the two discontinuities is normal relative to the global average and indicates that upwelling beneath the southern East Pacific Rise is not associated with an excess temperature in the mantle transition zone.     

The global morphology of wave Poynting flux: powering the aurora

Large-scale, electric currents flowing along magnetic field lines into the polar regions of Earth are thought to be the main contributors of the energy that powers the ionospheric aurora. However, we have found evidence for global contributions from electromagnetic waves (Alfvén waves). Data that were collected from the Polar spacecraft over the course of 1 year show that the flow of wave electromagnetic energy at altitudes of 25,000 to 38,000 kilometers delineates the statistical auroral oval. The Poynting flux of individual events distributed along the auroral oval was larger than 5 ergs per square centimeter per second, which is sufficient to power auroral acceleration processes. This evidence suggests that in addition to magnetic field-aligned currents, the dayside and nightside aurora is globally powered by the energy flow of these high-altitude Alfvén waves.     

Artificial airglow excited by high-power radio waves

High-power electromagnetic waves beamed into the ionosphere from ground-based transmitters illuminate the night sky with enhanced airglow. The recent development of a new intensified, charge coupled-device imager made it possible to record optical emissions during ionospheric heating. Clouds of enhanced airglow are associated with large-scale plasma density cavities that are generated by the heater beam. Trapping and focusing of electromagnetic waves in these cavities produces accelerated electrons that collisionally excite oxygen atoms, which emit light at visible wavelengths. Convection of plasma across magnetic field lines is the primary source for horizontal motion of the cavities and the airglow enhancements. During ionospheric heating experiments, quasi-cyclic formation, convection, dissipation and reappearance of the cavites comprise a major source of long-term variability in plasma densities during ionospheric heating experiments.     

基于微波反射法的冬笋探测器设计

针对目前我国冬笋采收只能依靠传统人工经验法,没有合适的探测设备的问题,根据高频电磁波作用下冬笋与土壤的介电特性差异导致反射系数显著不同的原理,设计基于微波反射法的冬笋探测器。该探测器通过2块贴片天线向土壤发射并接收电磁波信号;构建基于卷积神经网络的回波序列检测模型,用于所设计冬笋探测器接收回波信号的分类,利用回波信号的电磁波衰减强度判断土壤内是否有冬笋存在。试验结果表明,本研究提出的回波序列检测模型通过冬笋探测器回波信号判断土壤内有无冬笋的准确率为79.08%,漏警率为21.47%,虚警率为20.37%,与支持向量机以及频谱阈值法相比,回波序列检测模型在冬笋探测的准确率、虚警率、漏警率方面均为最优。该探测器能对地下冬笋位置进行预测,可提高冬笋采收效率。     

Bistatic-radar observation of long-period, directional ocean-wave spectra with loran a

Bistatic-radar scattering from medium- to long-wavelength (80 to 200 meters) ocean waves has been observed with the use of loran A (1.85 megahertz) transmissions and a receiver located 280 kilometers away. The received echoes have been converted into a time-delay, Doppler-frequency map in which the effects of anisotropies in the ocean-wave spectra are clearly shown. The distribution of the echoes in delay-Doppler space is consistent with Bragg scattering from trains of dispersed ocean waves.     

不同型号酵母浸粉及补糖对异养微藻生长的影响

微藻在FM802、FM902和FM760 3种不同型号的安琪酵母浸粉配制的培养基中进行异养生长,培养条件为28℃、200 r/min的摇床中进行暗培养,培养过程中补糖1次,每隔24 h取样20 mL进行分析检测。结果表明:补糖情况下,型号为FM802的酵母浸粉比FM902培养微藻的效果稍好,FM760培养效果稍差;补糖有利于微藻干物质重的增加;在pH值为4.2~5.5的培养基中,微藻仍能快速生长。     

Alternate row mulching optimizes soil temperature and water conditions and improves wheat yield in dryland farming

Straw mulching allows for effective water storage in dryland wheat production. Finding a suitable straw mulching model that facilitates wheat growth was the objective of this study. A 2-year field experiment was conducted to investigate the effects of two straw mulching patterns(FM, full coverage within all the rows; HM, half coverage within alternate rows) and two mulching rates(4.5 and 9.0 t ha~(–1)) on soil moisture, soil temperature, grain yield, and water use efficiency(WUE) of winter wheat in northern China, with no mulching(M0) as the control. Results showed that mulching increased the soil water storage in all growth stages under high mulching rates, with a stronger effect in later growth stages. Water storage under the HM model was greater in later stages than under the FM model. Soil water content of HM groups was higher than that of FM groups, especially in surface soil layers. Evapotranspiration decreased in mulched groups and was higher under high mulching rates. Aboveground biomass during each growth stage under the HM model was higher than that under M0 and FM models with the same mulched rate, leading to a relatively higher grain yield under the HM model. Mulching increased WUE, a trend that was more obvious under HM9.0 treatment. Warming effect of soil temperature under the HM pattern persisted longer than under the FM model with the same mulching rates. Accumulated soil temperature under mulched treatments increased, and the period of negative soil temperature decreased by 9–12 days under FM and by 10–20 days under HM. Thus, the HM pattern with 9.0 t ha–1 mulching rate is beneficial for both soil temperature and water content management and can contribute to high yields and high WUE for wheat production in China.     

Core rotational dynamics and geological events

A study of Earth's fluid core oscillations induced by lunar-solar tidal forces, together with tidal secular deceleration of Earth's axial rotation, shows that the rotational eigenfrequency of the fluid core and some solar tidal waves were in resonance around 3.0 x 10(9), 1.8 x 10(9), and 3 x 10(8) years ago. The associated viscomagnetic frictional power at the core boundaries may be converted into heat and would destabilize the D" thermal layer, leading to the generation of deep-mantle plumes, and would also increase the temperature at the fluid core boundaries, perturbing the core dynamo process. Such phenomena could account for large-scale episodes of continental crust formation, the generation of flood basalts, and abrupt changes in geomagnetic reversal frequency.     

基于LabVIEW设计的蔬菜大棚种植监控系统

针对于我国北方蔬菜大棚设备简陋,监控设备不足,产出投入比不高等问题,设计了基于Lab VIEW的蔬菜大棚种植监控系统。系统将蔬菜大棚内的温湿度、光照度、气体(O2、CO、CO2)浓度、肥液浓度和流量等参数,通过传感器变送后经数据采集单元采集后传至PC机,并在Lab VIEW中利用基于数据的生产者/消费者框架编写了系统的监控软件。监控系统将蔬菜大棚内环境参数进行实时采集与显示,并通过输出脉冲宽度调制(pulse width modulation,PWM)波控制执行部件,使温湿度、光照度、气体浓度、肥液浓度和酸碱度以及流量等参数快速稳定在设定范围内;在系统编程中,利用Lab VIEW控件自定义功能,设计了形象简洁的交互界面,实现了自动滴灌混肥和环境监控的功能。     

板材三维尺寸自动检测装置的研究

该装置分为三路对板材的长、宽、厚三个尺寸进行自动检测。长度检测选用光电码盘传感器。宽度检测选用激光扫描器,它产生自左至右的扫描平行光线。板材通过检测台。遮住部分光线,未被遮住的部分光线由受光器接收。并经过光电转换器把光信号转换为电信号。厚度检测采用旋转变压器。由于板材厚度的改变。旋转变压器的旋转角度发生变化,从而使旋转变压器的输出电势不同。长、宽、厚三路检测信号经接口电路送往单板机。接着程序先进行长度检测。而后宽、厚同时检测。该装置检测精度高。