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一yí个ɡè小xiǎo男nán孩hái看kàn见jiàn小xiǎo丽lì手shǒu里li拿ná着zhe一yì包bāo诱yòu人rén的de糖tánɡ果ɡuǒ,他......
一yì天tiān,小xiǎo明mínɡ问wèn君jūn君jun:“你nǐ看kàn到dào我wǒ奶nǎi奶nɑi了le吗mɑ?” 君jūn君jun说shuō:“没mé......
This article treats the chunk ’lian...dou’ as a complex conjunction on the ground that the sentence thatfollows the s......
Up to the present there has been no definite report made upon the few skeletal remains of Sinanthropus other than skull......
By mixing appropriate quantity of FeCl_2, (NH_4)_2MoS_4 ano HSCH_2CH_2OH in MeOH--MeONa, the crystal [(C_2H_5)_4N]_4[Fe......
In order to improve the test accuracy of CCD,a new type of CCD device is proposed.Several columns(rows) of photoelectric......
We have developed a new radiography setup with a short-pulse laser-driven x-ray source. Using a radiography axis perpend......
A novel structure is proposed for doubling the vertical breakdown voltage of silicon-on-insulator(SOI) devices. In this ......
【Abstract】Ralph, the hero of Typical American written by Gish Jen, is originally a Chinese man who goes to America for P......
China takes the 1st place in the world on tita- nium resource with prospected reserve of 703 million tons, accounting fo......
HAVING spent a decade running businesses worldwide,I thought the time had come.I made one of the most important decision......
XPS-INVESTIGATION OF INTRAMOLECULAR CHARGE TRANSFER IN POLYNITROCOMPOUNDS——ON THE ELECTRONIC STRUCTU
Ten benzofuroxans and their derivatives have been systematically investigated by XPStechnique. A fairly good correlation......
Confucius said,“By nature we converge;by custom,we diverge.”Simply put,people from all cultures are endowed with the s......
Synthesis and Crystal Structure of a Tetranuclear Complex Zinc(Ⅱ) with Schiff Base- [Zn(O)C_6H_4CH =
The title complex is a new tetranuclear chelate of Schiff base. Thecomplex crystallizes in the tetragonal, space group P......
Bridge health monitoring(BHM) has become increasingly significant in the life-cycle of the structure such as maintenance......
According to Rao Da,the Secretary-General of the National Passenger Car Liaison Conference,SUV(sport utility vehicle)co......
There is no spontaneous chromosome doubling in haploid plants produced by wheat X maize crossing. In order to obtain do......
CONSTANT WORK-POINT CONTROL FOR PARALLEL HYBRID SYSTEM WITH CAPACITOR ACCUMULATOR IN HYDRAULIC EXCAV
Limitations of various accumulators in hybrid hydraulic excavator are analyzed. A program using capacitor as the accumul......
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
给出了变速恒频双馈风力发电系统中交流励磁电源的控制方案.在基于电网电压定向的基础上,分别对转子侧变换器和网侧变换器进行了研......
CONSTANT WORK-POINT CONTROL FOR PARALLEL HYBRID SYSTEM WITH CAPACITOR ACCUMULATOR IN HYDRAULIC EXCAV
Limitations of various accumulators in hybrid hydraulic excavator are analyzed. A program using capacitor as the accumul......
为改善电动汽车三合一驱动系统中电机控制器的运行环境和总成的振动噪声,在总成振动噪声特性试验的基础上,通过工况传递路径分析提......
某些散货码头项目中,码头位置距离后方陆域较远,需要利用长距离带式输送机将物料从码头输送到后方。针对常规的水平运输方案会造成......
随着国家“双一流”建设方案的实施,高水平行业特色高校迎来了新的发展机遇,在满足国家急需和支撐行业转型升级方面,行业特色高校......
文章以青岛地区典型的"上软下硬"土岩复合地层为工程地质背景,在充分调研、统计、归纳地层纵深岩土体力学参数的分布规律及特征的......
Professor Jia Chunsheng is one of the sixth of old traditional Chinese medicine experts,and often instructs students in ......
为解除液压执行元件进回油口间的联动,降低工作过程中系统的总液动力矩,提出了一种基于双阀芯结构的负载口独立控制式并联换向阀。......
研究食饵与捕食者均具有线性密度制约的HollingⅢ型捕食动力系统.得到了正平衡点的全局稳定性和非小振幅极限环的存在惟一性的充分......
研究了基本彩票类型的管理模型,建立了一个双目标函数优化模型,并利用中奖率、剩余奖金金额、彩票的吸引力和方案的效用函数等指标......
自张骞"凿空"丝绸之路,中原度量衡传入新疆后,就被新疆各族人民接受,成为主要使用的计量单位。中原度量衡在汉代得到广泛使用,在唐......
介绍一种基于双平方根算子的叠前深度偏移方法用于结构损伤探测。首先推导上行波传播时间(走时)的全微分表达式,推导在频率波数域和......
为解决无线传感器网络(WSNs)能量消耗分布不均,增加WSNs生命周期,提出了基于改进的模糊C均值(FCM)聚类分簇与最小树的WSNs路由协议。算......
本文分析了汽车的环境污染特点及状况,阐述了汽车排放的成分与途径,以及对大气环境和人体健康带来的危害,提出了对汽车有害气体的净化......
根据基础会计教学经验,结合学生在学习复合会计分录和借贷记账法中出现的问题,探究解决之道,以利于初学者的学习。......
转速电流双闭环直流调速系统中的PI控制器直接影响其调速性能,利用MATLAB分别建立了由常规PI与模糊PI控制器组成的转速电流双闭环......
为提高部分数据缺失情况下智能电网光伏发电功率预测精度,提出一种基于双维度顺序填补框架与改进Kohonen天气聚类的光伏发电功率预......
18型下偏复合平衡抽油机在现场应用过程中出现了数起横梁螺柱断裂事故,产生的原因主要由制造、现场维护以及设计等方面的综合因素......
在网络控制系统(NCS)中,死区反馈调度方法可以在网络资源紧缺时提高服务质量(QoS),但同时以牺牲控制系统的控制品质为代价。本文提出了改......
基层运动会,特别是中小学田径运动会,弯道不分道跑项目一般只设一条起跑线,在起跑出发阶段常常因参赛人数过多而出现运动员相互拥挤、......
天然气的广泛应用,促进存储容器向大型化发展。以已投产使用的10km^3天然气球罐为设计基础,设计建造完全国产化的15km^3天然气球罐,利......
通过建立三自由度碰撞振动系统的物理模型,运用映射法对系统的Hopf分岔和Hopf-flip余维二分岔进行了研究.分析了系统周期运动经倍......
与传统的逆变器相比,Z源逆变器由于其具有可以实现升降压功能、无需插入死区时间等优点而得到了广泛的应用。针对逆变器输出电压、......
目的:研究苯丙哌林三种口服制剂单次及连续用药的药动学特征,评价制剂的人体生物等效性.方法:健康受试者口服苯丙哌林肠溶衣片、缓释......
如何将中国社会发展特定历史阶段的现实要求与共产主义理想的价值追求有机地结合起来,实现两者的良性互动,使共产主义理想能够成为引......
本文讨论了一种新的烘水预测与警报系统,并对关键部分水位遥测给出硬软件方案,进行了实验论证。......
对碳纤维增强树脂(CFRP)网格加固受损缩尺盾构隧道模型的有效性进行了试验研究.首先,对CFRP网格与混凝土表面采用不同粘结材料和表面......
开发了一种由曲柄滑块机构控制的无人驾驶自行车系统。首先通过质点系相对于动轴的动量矩定理,并结合曲柄滑块机构的运动特性对自......
锂电池是一种复杂的电化学系统,其容量衰退呈非线性退化,粒子滤波(particle filter, PF)算法作为解决非线性非高斯问题的有效算法......