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1. Test description 1.1 General description of the first mock test The Senior High School Entrance Exam is held in......
本文考虑超高维情形下线性回归模型的变量选择和参数估计问题.利用M-估计方法,将最小二乘、最小一乘、分位数回归以及Huber回归统......
Two years ago， I had a very straightforward reading pattern. Every few days， I’d read a book. I would immerse myself in i......
采用Negativity熵度量两体纠缠,通过数值计算研究了类W态原子与耦合腔相互作用系统中两原子间的纠缠。讨论了描述原子初态的参量变......
Determination of Mineral Elements in Lycium barbarum L. from Ningxia by Sealed Microwave Digestion I
[Objective] To determine the content of mineral elements in Lycium barbarum L.from Ningxia.[Methods] Taking HNO3-H2O2 as......
The rapid generation of molecular in a relatively easy manner has made the cycloaddition reaction a powerful tool in the......
The effects of composite supports of CeO2-Al2O3,MgO-Al2O3,TiO2-Al2O3 or ZrO2-Al2O3 on the methanation activity of suppor......
Development of bis-thiobarbiturates as successful urease inhibitors and their molecular modeling stu
Bis-thiobarbiturate derivatives 1–15 have been synthesized, characterized by1 HNMR and EI-MS and screened for urease in......
徐成斌教授是我国长期从事心血管医疗及防治研究的著名专家。本文从高血压总危险的评估及治疗策略着手,重点阐述了6个最新治疗策略......
Transmitter identification(TxID) technique is used to diagnose the operation status of radio transmitters in DTV distrib......
Discussions were made of the principle,method and computer program for drawing the pre-dominance diagrams of the bi-met......
We demonstrate a high power high beam quality diode-pumped 1 112-nm Nd:YAG master-oscillator poweramplifier(MOPA)laser s......
As a composition of rockmass, structural planes are one of the chief factors that can largely control the mechanical re......
为探索同义密码子对RNA G-四联体(rG4)形成的适应效应,利用G4Hunter算法搜寻5类真核生物mRNA蛋白编码区的rG4结构.通过对比天然序......
ZrO2/Graphene nanocomposites are fabricated from graphene oxide by one-step, green, facile and low-cost SCCO2 method. Th......
A facile approach to prepare a thin film vapor sensor is demonstrated through droplet interfacial reaction on an IDA mic......
我们要讨论的聊天室功能非常简单,感兴趣的朋友可以将其功能扩展,发展成一个功能比较完整的聊天室,如加上用户认证、用户昵称、秘......
A new approach for transforming the cultured cells of wheat(Triticum aestivum L. cv. Ganmai 8) was developed using Agrob......
Colorectal cancer(CRC) is the second most commonly diagnosed cancer among females and third among males worldwide. It al......
[Objective] To research on the isolation,identification and determination of verbascoside in Callicarpa longissima( Hems......
Dimethyl ether(DME) was synthesized from methane through a two-step process,in which CH3Br was prepared from the oxidati......
The First China Manufacturing Technology Development Forum for Large Castings Forgings was held on August 27-30, 2006 i......
A sensitive, selective and high-throughput liquid chromatography–tandem mass spectrometry(LC–ESI–MS/MS) method was de......
Biomimetic Epxidation of Alkenes by Phenyliodonium Diacetate [PhI(OAc)_2] in the Presence of Mn(Ⅲ) C
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Spectral feature channels are selected based on the optimization theory and by makinguse of Shannon’s formula with main......
Estimating Digital Inter-Symbol Interference Channel Blindly Based on the One-Step Branch Transition
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Remote sensing and geographic information systems in the spatial temporal dynamics modeling of infec
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In this article, a new system model for sphere decoding (SD) algorithm is introduced. For the 2×2 multiple- input multi......
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Benign hepatic tumors are commonly observed in adults,but rarely reported in children.The reasons for this remain specul......
Pattern classification is an important field in machine learning; least squares support vector machine (LSSVM) is a powe......
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A nanosilica/exfoliated graphene composite film-modified electrode for sensitive detection of methyl
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Electrochemical aptasensor for the detection of vascular endothelial growth factor(VEGF) based on DN
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To improve the reliability of spaceborne electronic systems,a fault-tolerant strategy of selective triple modular redund......
Genetic variation of yellow pigment and its components in foxtail millet(Setaria italica(L.) P.Beauv
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Identification of target behavior in process of intervention for children with feeding difficulty an
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在毕业生数据处理和上报工作中,常常面对差异数据的比对和检索,在记录较多、字段较繁杂的情况下,手工方法或者EXCEL排序比对都不能......
Molecular Design of Crown Ethers. 191. Synthesis of Novel Disulfide- and Diselenide-Bridged Bis (ben
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......
德国KREIDLER强劲推出两款堪称“2013”的电动自行军新品——“E-MTB KREIDLER VITALITY DICE 29”及“KREIDLER VITALITY SELECT 45 km／
德国著名的自行车生产厂商——KREIDLER前不久推出了两款专为2013年自行车市场所打造、配备BOSCH一驱动装置的电动自行车新品：即“E......
目的 探讨Lenke5、6型青少年特发性脊柱侧凸(AIS)患者选择性前路手术的筛选指标.方法 回顾性分析我院1999年3月至2004年5月期间收......
SQL语句的优质与劣质直接影响对数据库操作的效率,他们的差别可以达到几十倍甚至上百倍.在实际应用中提高SQL语句的效率实质就是在......
探讨了鹿科6属动物主要组织相容性复合体dra(mhc-dra)第二外显子的变异特点,揭示其分子水平上的进化选择模式,并与cytb进行了比较.......
Molecular Design of Crown Ethers. 191. Synthesis of Novel Disulfide- and Diselenide-Bridged Bis (ben
Two novel heteroatom-bridged bis (benzo-12-crown-4 ether)s, i.e. bis [2-nitro-4,5-(1,4,7,10-tetraoxadecamethylene)phenyl......
运用excel中的宏程序，可以解决以前需要人工完成的繁琐工作，现以实际工作中出现的一个具体问题举例，编制宏程序实现两张excel表之间的......
德国KREIDLER强劲推出两款堪称“2013”的电动自行军新品——“E-MTB KREIDLER VITALITY DICE 29”及“KREIDLER VITALITY SELECT 45 km／
德国著名的自行车生产厂商——KREIDLER前不久推出了两款专为2013年自行车市场所打造、配备BOSCH一驱动装置的电动自行车新品：即“E......
SQL＿SELECT的主要功能是对关系数据库中的二维表进行数据检索。因为其语法结构比较复杂、语义较为严格、使用较为灵活，因此大多数非......
通过对科学研究内在机制的分析,揭示出价值取向对科学研究的制约作用:价值取向不仅制约着主体对研究对象、客体信息的选择以及事物......
