An approximate simulation method has been developed for the shielding effectiveness of a rectangular enclosure with arbi......

Hydraulic fracturing is a powerful technology used to stimulate fluid production from reservoirs.The fully 3D numerical ......

Based on fieldwork and specimen examination,taxonomic revision of Dendrobium moniliforme complex and Dendrobium scoriaru......

According to the book Ten Thousand Things:Module and Mass Production in Chinese Art,the "modular" design method has be......

A 62-year-old Chinese man’s traditional carpentry skills are delighting tens of millions of viewers on the Internet as ......

Different morphologies of β-FeOOH were prepared by hydrothermal synthesis using NaH2PO4 as structural modifier. The rod......

A two-dimensional phononic crystal(PC) structure possessing a relatively low frequency range of complete bandgap is pres......

Hi， boys， what do you want for dinner tonight ？...

The lens-shaped Miaoya carbonatite complex,located west of the Wudang massif,HubeiProvince,consists of several types of......

The primary halos of porphyry copper deposits are characterized by compositional zoning inthree dimensions. Two ideal z......

Spatial precession is a special micro-motion of the spinning-directional target,and the micro-Doppler signature of the c......

The dispersion characteristics and transverse field distribution of the fundamental and higher order modes are analyzed ......

A compact fiber Bragg grating(FBG) diaphragm accelerometer based on L-shaped rigid cantilever beam is proposed and exper......

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In indirect drive, reducing peak intensity of a single beam and controlling overlap of multi-beams are two opposite requ......

By transferring 100 nm gold-coated CVD monolayer graphene onto the well-polished surface of D-shaped fiber, we achieve a......

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An electrodeposition method and its experimental device for rehabilitation of cracks in reinforced concrete were propose......

In recent years, super high-rise buildings (>500 m) are developing very quickly and become an important frontier of civi......

A method of fabricating dual-band left-handed metematerials(LHMs) is investigated numerically and experimentally by sing......

Spermatogenesis is a complex process of terminal differentiation by which mature sperms are generated,and it can be divi......

Porous carrier MgO which was aggregated by nano-particles has been firstly prepared by using a normal technology route. ......

Dual phase heat treatment is an economical and effective way for improving the properties of low carbon steels and low-a......

Sensitivity Analysis of Cup-shaped Flexible Gear Parameters to Its Stress Based on ANSYS 1 GAO Haibo1, 2 LI Zhigang1, 2 ......

Many factors influence the fatigue and crack growth behavior of welded joints. Some structures often undergo fairly larg......

The name “Italy” is extremely old. It seems to have been used first in documents of the 5th century BC. to describe a ......

The decomposition of the coarse primary M_2C carbide in M2 high speed steel was investigated by using optical microscope......

The Warring States Period(475 B.C.—221 B.C.)Length:21.5 cmIn this bronze master mould,there are two patterns for making......

The characterization of x-shaped antenna arrays operating in the mid-infrared is proposed. An equivalent circuit model f......

In this paper we present a novel nanoantenna(nantenna) design for energy harvesting. The nantenna has an “E”shape and ......

Surprising facts about reindeer　　难词探意　　1. tundra /tndr/ n. 苔原　　2. antler /ntl（r）/ n. 鹿角　　3. ultraviolet /l......

钢-混凝土组合梁便于实现预制装配化,是一种与工业化建造要求相适应的桥型。基于工业化建造思路,采用最大高度1.1 m左右的重型H型......

将馈源辐射场分解为多个高斯波束（GB）,其相应的参数由反射面天线形状与馈源类型决定,其展开系数通过最小平方法或点匹配法计算得到。......

分析了碱溶性聚酯制备时单体组分的选择，介绍了碱溶性聚酯在海岛型超细纤维、微孔干爽型纤维、异形截面纤维等新合纤材料中的应用。......

What was your childhood like?Childhood is a universal experience, something every adult across the world has gone throug......

提出了一种改进的适应度函数确定方法，算法采用易操作的二进制鳊码。通过改变适应度函数中的待定参数，有效提高了搜索效率。采用遗传......

某不锈钢薄壁锥形异形件拉伸过程中容易产生失稳、反弹和破裂等缺陷，为控制产品质量，采用DEFORM-3D软件为平台，利用有限元分析方法对0......

利用LS-DYNA有限元分析软件,研究典型聚能装药射流与杵体对应初始药型罩的材料分配关系,并依据该分配关系设计了一种新型变壁厚双......

中国画在造型和表现手法上同中华民族传统的哲学思想及审美观念相一致,强调客观物形从属主观意念,不拘泥事物的外表形体,讲究神韵,......

介绍了300 kt/a醋酸装置中锆材换热器制造的主要制作工艺和控制要点,为特殊材料设备制造积累了宝贵经验。......

以城市污泥为原料,经氯化锌活化-管式炉热解、活性炭/铁氧化物共沉淀及粘接挤压成型制得一种新型磁性污泥活性炭,并通过正交实验和......

通过对混凝土目标特性的分析,利用ANSYS/LS-DYNA软件对聚能装药成型过程和混凝土靶的侵彻进行数值仿真.在此基础上以某坦克炮为发......

以仁新高速坪田隧道为例,针对软弱破碎围岩地段特点,选择了精细爆破技术结合微台阶开挖工法,该施工方法经过实际工程验证,可以有效......

With respect to the problems of that the shaped charge warhead currently uses a cover method to improve the penetration ......

模具内腔抛光是模具加工的瓶颈，为了解决手持式超声抛光机低效率、加工品质不容易保证的问题，拟采用可以更换不同成形工具头的自动超......

用活塞异形外圆数控车床在不同加工条件下加工活塞,测量活塞的最大径尺寸,研究分析了车床加工原理,梳理了活塞加工过程中微进给系......

With the development of two-stage munitions(a precursor shaped charge(SC)and a following kinetic energy projectile)to at......

文章通过分析ＡＰＩＲＰ４３第四版流动特性试验的不足以及第五版的改进情况，介绍了我国与之在技术上等效的流动特性检测技术的发展，并指出流动特性......

On a street in Zhenhu town,Suzhou,a studio named MeWe launched a summer course recently in which Zhang Xue teaches begin......

Copper lined wave shaped shaped charges of particular design and liner metallurgy were used to investigate the effect of......