Hua Zhang

Bio: Hua Zhang is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Medicine & Graphene. The author has an hindex of 163, co-authored 1503 publications receiving 116769 citations. Previous affiliations of Hua Zhang include Shenzhen University & Zhengzhou University.

Vapor–liquid–solid growth of endotaxial semiconductor nanowires

Abstract: Free-standing and in-plane lateral nanowires (NWs) grown by the vapor–liquid–solid (VLS) process have been widely reported. Herein, we demonstrate that the VLS method can be extended to the synthes...

Reciprocating extruding device and machining method of reinforced magnesium alloy tube

Abstract: The invention relates to a reciprocating extruding device and a machining method of a reinforced magnesium alloy tube, belongs to the field of plastic machining of nonferrous metals. The reciprocating extruding device comprises an upper extruding ring, a lower extruding ring, an upper fixed extruding rod, a lower fixed extruding rod, an extruding cylinder mold and a necking region, wherein the extruding cylinder mold is divided into an upper mold cavity and a lower mold cavity by the necking region, and a heating sleeve is arranged on the outer wall of the extruding cylinder mold; the upper extruding ring and the lower extruding ring are respectively arranged at the peripheries of the upper fixed extruding rod and the lower fixed extruding rod and are respectively arranged in the upper mold cavity and the lower mold cavity, the upper extruding ring and the upper fixed extruding rod are connected with an upper hydraulic stretching cavity, and the lower extruding ring and the lower fixed extruding rod are connected with a lower hydraulic stretching cavity. The reciprocating extruding device has the beneficial effects that the tensile strength of the magnesium alloy tube machined by virtue of the reciprocating extruding device can reach 500MPa, and an extruding mold is simple in structure and strong in operability of extrusion deformation and can realize continuous extrusion deformation, so that the production cost is relatively low, and the production efficiency is high.

I and i

Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

Fast parallel algorithms for short-range molecular dynamics

Abstract: Three parallel algorithms for classical molecular dynamics are presented. The first assigns each processor a fixed subset of atoms; the second assigns each a fixed subset of inter-atomic forces to compute; the third assigns each a fixed spatial region. The algorithms are suitable for molecular dynamics models which can be difficult to parallelize efficiently—those with short-range forces where the neighbors of each atom change rapidly. They can be implemented on any distributed-memory parallel machine which allows for message-passing of data between independently executing processors. The algorithms are tested on a standard Lennard-Jones benchmark problem for system sizes ranging from 500 to 100,000,000 atoms on several parallel supercomputers--the nCUBE 2, Intel iPSC/860 and Paragon, and Cray T3D. Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems. For large problems, the spatial algorithm achieves parallel efficiencies of 90% and a 1840-node Intel Paragon performs up to 165 faster than a single Cray C9O processor. Trade-offs between the three algorithms and guidelines for adapting them to more complex molecular dynamics simulations are also discussed.

疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A

Abstract: 抗原变异可使得多种致病微生物易于逃避宿主免疫应答。表达在感染红细胞表面的恶性疟原虫红细胞表面蛋白1（PfPMP1）与感染红细胞、内皮细胞、树突状细胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作用。每个单倍体基因组var基因家族编码约60种成员，通过启动转录不同的var基因变异体为抗原变异提供了分子基础。

Electronics and optoelectronics of two-dimensional transition metal dichalcogenides.

Abstract: Single-layer metal dichalcogenides are two-dimensional semiconductors that present strong potential for electronic and sensing applications complementary to that of graphene.