绿色能源——太阳能充电器

太阳能充电器使用太阳能电池板,经太阳光辐射产生电能对电路提供直流电源经对被充电池充电,并能在保护电路控制下当电池充电完成后自动停止充电。本充电器设计电压稳定,调压和使用范围广,适用不同型号锂电池的充电。     

太阳能无线充电器的设计

利用太阳能无线充电技术设计了一种手机充电器,使用绿色环保的太阳能作为能量源。利用太阳能电池板的光电效应,实现光能到电能的转换,利用无线磁能耦合技术,使能量在空间中进行传递,接收端设计了整流和稳压电路,将交流电压变为纹波较小的直流电压。该充电器能够替代传统的移动终端充电器,实验表明充电器稳定、有效。     

财政分权对城乡收入差距的影响—基于区域技术创新的遮掩效应

设计了一种太阳能手机壳。以太阳能电池板作为发电装置,采用LM2596-5V稳压电路将太阳能板输出的电流电压转换为手机充电所需的5V电压,降压稳压电路的电压输出端连接Micro USB接口或Type-C接口,将该接口置于手机壳的正下方,手机充电口直接插入该接口,即可将手机接入充电电路,无需充电线即可为手机充电,极大地方便人们的出行。     

太阳能便携式多功能电源设计与实现

设计了一款太阳能便携式多功能电源系统,由太阳能电池、锂离子电池、充放电控制系统等组成.其中电池板供电电压经过Buck型变换器降压后给锂离子电池充电.另外,该一体机提供多种输出方式,一个方式经过LM2676-5.0稳压电路,稳定地输出5V电压,手机、MP3、MP4、数码相机等下小功率设备通过USB口接入即可充电,非常方便.另一方式经过Boost变换器升压,输出16V、19V的电压,可为Pad、笔记本等大功率设备供电.该系统体积小、功能多,实现了真正意义上的便携.     

太阳能充电系统控制结构研究与设计

太阳能技术是当今世界竞相研究的应用技术,太阳能充电是将光能转换为电能的一种应用方式.通过对太阳能电池板输出模型的研究以及太阳能充电系统效率的分析,得出充电效率的影响因素,提出为提高太阳能充电效率需要注意解决的问题,并以此提出了一整套完整的充电系统设计方案.经过设计、验证,该系统可完成充电要求,并一定程度的提高充电效率,而且可实现充电的控制.     

基于PVDF的压电能收集电路的设计

针对环境中压电振动能的收集问题,该文提出基于PVDF(压电薄膜)的压电能收集电路的设计。首先,需要对PVDF压电传感器的具体工作原理进行研究,制作一种可以将PVDF中压电能提炼出来的传感器;其次,将采集到的振动电压信号,通过AC-DC、DC-DC转换电路进行整流、滤波、升压;最后,通过充电电路给锂电池进行充电,将不易收集利用的压电能改变成稳定的电能存储在锂电池中,实现压电能的合理收集和利用。     

太阳能手机电池充电器设计研究

文中介绍了所设计的太阳能手机充电器, 与普通的手机充电器相比, 它的特殊之处除了能源的供应是来自于太阳能电池板外, 还具有特殊的充电保护电路.把太阳能电池板放在一个有阳光的地方, 即可以为手机提供一个方便的太阳能充电点.这种便捷的太阳能充电器几乎可以在任何地方补充电力, 从而获得通信的自由.本文介绍太阳能手机充电器的控制电路及设计.     

太阳能光伏发电系统控制器的设计

本设计以STC12系列单片机为控制核心,对太阳能电池板的输出电压进行变换控制,并控制充电的方式,在基于对铅酸蓄电池损耗最小的情况下以最快的速度对铅酸蓄电池充电。从而高效的利用太阳能电池板的输出功率和铅酸蓄电池容量,减少设备的投资。     

脉冲式高效率LLC谐振变换电池充电器

结合快速脉冲充电方法,利用蓄电池经过瞬时放电去极化后受电能力较强的特点,同时结合蓄电池的脉冲充电曲线,合理选择谐振腔电压增益和谐振频率点,给出了一种LLC谐振式充电器的设计方法,解决了传统LLC谐振变换充电器轻载条件下效率低的问题,提高了充电器充电全过程的综合效率.方案在一个输入390VDC,输出48~75VDC,输出功率720 W的样机上得到验证,结果表明,充电器峰值效率达94.7%,最低效率89.4%,全过程的综合效率达92.3%.     

压电发电充电器的设计

为了收集环境振动机械能,设计一种是压电发电充电器,该系统主要由压电陶瓷发电设备、电能采集电路、升压电路、电池充电电路和电池电量测试部分等构成,实现了对微弱电量的收集、锂电池和镉镍电池的充电和电池电量多通道的检测,具有很好的应用前景。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.