In order to achieve the controllability of abrasive arrangement on working surface grinding wheel,a new kind superabrasive wheel, which has defined grain cluster pattern, been designed based phyllotaxis theory biology, and fabricated with UV lithography method electroplating technology. The analytical results indicate that phyllotactic parameters influence configuration work so as improve performance increasing diameter decreasing coefficient can increases density surperabrasive wheel...

In order to obtain a electroplated CBN cylindrical grinding wheel with ordered abrasive pattern, based on the phyllotaxis theory of biology, phyllotactic pattern and its mask were designed, this was fabricated lithography electroplating technology, also some problems processes investigated by experiments. The research results that can be realized help which give references for making kind engineered wheel.

In order to improve the lubricating performance of headface sliding bearing, a new kind bionic which has defined dimple pattern, been designed based on phyllotactic theory, and fabricated with UV lithography method electrolytic technology. A experiment done analyzed about influence time depth against different parameters. The analytical results indicate that parameters arrangement configuration, so as bearing. increasing diameter decreasing parameter c can increase density dimple....

In order to get the convex surface with phyllotactic pattern, pattern on end face of work-piece and its mask were designed based theory biology, was fabricated by electrolytic etching method, also fabricating processes investigated .The results show that can be method , under condition room temperature (25°C), composite liquid which composed NaCl,NaNO 3 ,Na PO 4 ,etc., has better performance than pure NaCl fluid, in current density 15A/dm 2 rate 3.292μm/min when steel 45 is etched. This...

Starting from the equations satisfied by vertex functions on closed time path, we derived generalized Langevin for order parameters and conserved variables. The proper form of variables, including automatically mode coupling terms, was determined Ward-Taka-hashi identities linear response theory. All existing dynamic models were recovered assuming corresponding symmetry properties system. whole theoretical framework is also applicable describing systems near steady states far equilibrium.

In order to improve the performance of end face grinding wheel, phyllotaxis theory is introduced into design wheel. Meanwhile movement track equation established, and effects phyllotactic coefficient on surface roughness are studied. The simulation results show that lower values can be obtained when choosing reasonable coefficient. It will provide theoretical basis for ordered abrasive patterns

In this article, we derived the transformations among three sets of elosed time path Green's functions and some calculation rules, from which a general definition arbitrary multipoint retarded advanced follows naturally. Some algebraic identities have shown to be consequences property W[J+,J-](J+=J-=J)=0 for generating functional on closed path.

In order to obtain the effects of abrasive configurations on grinding force superhard wheel, an experiment was carried out, which grinds steel material by use electroplating CBN wheel with different configurations, mainly including disordered, phyllotactic, matrix and dislocation configurations. The results show that under conditions, each will increase parameters, is smaller orderly than disordered same condition experiment, smallest phyllotactic

In order to improve the grinding performance of end face wheel, ordered theory is applied design wheel. Based on track equation grinding, effects parameters surface roughness are studied and compared with workpiece appearance by wheel different abrasive patterns. The simulation results show that values lower phyllotactic pattern than other It will provide theoretical basis for designing

摘要: 为减小加工振动对薄壁件平铣(端面盘铣)加工质量及效率的影响,提出一种实时铣削振动数据驱动的平铣工艺参数自适应优化方法。首先根据再生效应原理建立薄壁件平铣颤振稳定性模型。其次将薄壁件平铣过程中前一个工步内的实测振动数据分为若干段,以此模拟其材料去除过程,对各段铣削振动数据进行分析,由有限元单位力法和优化STD法分别识别出薄壁件刚度和各材料去除阶段模态频率及阻尼比,并由此导出薄壁件单模态频响函数,将其代入颤振稳定性模型求解稳定域叶瓣图并做插值处理后即可确定包含材料去除信息的薄壁件三维颤振稳定域叶瓣图。基于此,以避免铣削颤振、共振和满足机床性能要求为约束条件,以材料去除率最大为目标,利用遗传算法计算薄壁件下一个工步较优的工艺参数,如此循环进行,直到完成薄壁件加工。最后,通过某型飞机垂尾薄壁装配界面平铣试验验证该方法的可行性和有效性。由试验结果可看出,采用优化后的加工工艺参数,能使薄壁装配界面粗加工过程表面粗糙度从Ra 3.2提升为Ra 1.6,加工效率提高33%。

The expression of the effective action for order parameters is derived from continuous integral representation generating functional on closed time path in one loop approximation Fourier transforms. Lagrangian formulation critical dynamics recovered second fluctuations integral. various possibilities improving existing theory are considered.

A dynamical theory for quenched random system is developed in the framework of CTPGF. In steady states results obtained coincide with Chose following from average free energy. The order parameter , a matrix general, becomes an integral part second connected An equation to determine derived Dyson-Schwinger this formalism. Some general properties CTPGF are discussed.

A set of coupled equations for a quantum statistical system that determine self-consis-tently the order parameter, energy spectrum, dissipation and distribution both fermion field collective excitation is suggested with loop expansion formalism. They are applicable to non-equilibrium as well equilibrium systems.

In the area of grinding, ordering abrasive gains is one key ways to improve grinding wheel performance. this article, experimental investigations on temperature were carried out including using superhard with phyllotactic, matrix, dislocation and disordered configuration, distribution workpiece surface effects parameters have been obtained. The results showed that can be reduced efficiently by choicing phyllotactic pattern.

In order to resolve the theorized design problems on bionic non-smooth drag reduction surface of an arc-shaped revolution body, which mainly include structure morphology and spatial arrangement point, a kind designing method is presented based biological phyllotactic theory, mathematical equation point has been established, effects parameters form density have discussed, body designed by using 3D software. Research results shown that points increases with decreasing coefficient, area ratio...

In order to make the material removal distribution on polishing silicon surface more non-uniform during chemical mechanical (CMP), a kind of bionic pad with phyllotactic pattern has been designed based phyllotaxis theory, and by experiment, effects parameters distributions wafer surfaces are investigated. The research results show that uniform edge rounding can be decreased when reasonably selected.

We study the genuine multipartite entanglement of arbitrary n-partite quantum states by representing density matrices in terms generalized Pauli operators. introduce a general framework for detecting and non full-separability with dimensions based on correlation tensors. Effective criterion is derived to verify entanglement. Detailed examples are given show that detects more than existing criteria.

The surface texture of polishing pad is a key factor which determines the performance pad, and by altering geometrical pattern surface, polished workpiece can be improved. In this paper, based on phyllotaxis theory in biology, with phyllotactic has been designed effects parameters have discussed. Lastly, pads made lithography composite plating technology, influence correlative plated coating investigated. results indicated that abrasive grain block density increase increasing diameter D...

In order to obtain the contact pressure distribution between hard disc substrate and polishing pad its effects on profile of polished surface, elastic mechanical model mathematical equations chemical magnetic are established, also relevant boundary conditions put forward. The is calculated with FEM, experiments carried out surface profiles substrates obtained. study results show that non-uniformity in edge present biggish undulation. Choosing properly Young’s modulus pads decreasing...