昌吉州保护地蔬菜生产的发展方向

对昌吉州的蔬菜保护地生产状况、产量、经济效益、市场等方面进行调查，综合比较出适合我州发展的保护地蔬菜栽培类型：１）大力普及地膜覆盖蔬菜生产，２）大规模发展简易温室蔬菜生产，保证淡季蔬菜市场供应。     

塑料温室内部环境因子的变化规律及分析

通过对塑料温室内部温度、湿度、光照和土壤含水量的分析，总结出温度的日变化规律，月旬变化规律，空气相对湿度和光照强度的变化以及温度、湿度，光照等因子的相关性变化。     

绘画造型符号化

绘画造型符号化不是停留在对视觉表层的模仿,而是对客观对象认识和体验的更加深刻地表现,是表现客观对象的精神本质。简化的提炼性绘画造型符号,情感的体验性绘画造型符号都是绘画视觉真实的表现。绘画造型符号化能使画家的艺术个性得到充分发挥, 艺术观点、观念不断更新。     

触变成形A356铝合金成形力的上界解

金属半固态成形技术是一项高效的成形新技术 ,关于其成形力的理论计算还少有报道。本文采用上界理论解法 ,求解半固态A35 6铝合金触变成形力。假定变形体为质点连续分布的刚—塑性材料 ,设定连续函数速度场 ,将变形区分为圆盘和圆环两个塑性区、一个圆环刚性区等三个区 ,计算结果表明 ,触变成形力为 82 2 .98kN。与实测结果拟合良好。并讨论了影响成形力的因素     

确定材料J积分塑性因子η_(pl)的单试件法研究

本文在Ｌａｎｄｅｓ规则化方法基础上提出单试件确定塑性因子法，即只使用单个试件的实验记录Ｐ，Ｖ和ａ就可求得材料塑性因子ηｐｌ．其中实时裂纹长度ａ可以卸载柔度法或物理测量得到．通常规则化方法需一组试件．单试件法可避免多试件存在的尺寸分散性，也可使实验过程简化．文中结合３０４不锈钢实验进行分析，结果表明单试件法简便、实用、精度较高．     

Time-Division Observation of Plastic Deformation Process Using Digital Speckle Pattern Interferometry

Time-division digital speckle pattern interferometry to observe temporal variation of in-plane deformation fields of a whole process of plastic deformation until fracture was proposed. Experiment of tensile test of an aluminum plate exhibited dynamic movements of successive fringe patterns which were very complicated. They suggest that plastic deformation propagates nonlinearly in the specimen by repetition of energy relaxation processes and concentration processes.Presented at 1996 International Workshop on Interferometry (IWI ‘96), August 27-29, Wako, Saitama, Japan.     

Crack Arrest Model for a Plate Weakened by Internal and External Cracks - a Modified Dugdale Approach

A modified Dugdale model solution is obtained for an elastic-perfectly-plastic plate weakened by one internal and two external straight collinear hairline cracks. The tension applied to the infinite boundary of the plate opens the rims of cracks with forming a plastic zone ahead of each tip of the internal crack and also at each finitely distant tip of the two external cracks. The developed plastic zones are closed by normal cohesive linearly varying yield-point stress distributions applied to their rims. The problem is solved using the complex-variable technique. A case study is carried out to find the load required to prevent the cracks from further growing with respect to affecting parameters. The results obtained are reported graphically and analyzed.     

塑料加强帽在煤矿许用型电雷管中的应用

从生产实际出发，探讨了在煤矿许用型电雷管生产中以高压聚乙烯加强帽替代金属加强帽，从而简化工序、降低成本、以利于安全生产和产品质量的可行性。     

Science and technology with nuclear tracks in solids

Fission track dating has greatly expanded its usefulness to geology over the last 40 years. It is central to thermochronology—the use of shortened fission tracks to decipher the thermal history, movement, and provenance of rocks. When combined with other indicators, such as zircon color and (U–Th)/He, a range of temperatures from C to C can be studied. Combining fission track analysis with cosmogenic nuclide decay rates, one can study landscape development and denudation of passive margins. Technological applications have expanded from biological filters, radon mapping, and dosimetry to the use of ion track microtechnology in microlithography, micromachining by ion track etching, microscopic field emission tips, magnetic nanowires as magnetoresistive sensors, microfluidic devices, physiology of ion channels in single cells, and so on. In nuclear and particle physics, relatively insensitive glass detectors have been almost single-handedly responsible for our knowledge of cluster radioactivity, and plastic track detectors together with automated measuring systems have been used at the Bevalac, Brookhaven, CERN, and GSI, mainly to study fragmentation of high-energy heavy nuclei. Almost everything we know about the ultraheavy cosmic rays has been learned using Lexan on the Long Duration Exposure Facility and BP-1 phosphate glass on the Mir Station. New topics include development of calorimetric aerogels capable of measuring kinetic energies of hypervelocity interstellar and interplanetary dust grains in space and research on identification of strains of Bacillus spores by measurements of their size and swelling rates when humidified.     

Crystallinity changes in plastically deformed isotactic polypropylene evaluated by x‐ray diffraction and differential scanning calorimetry methods

The crystallinity of isotactic polypropylene (iPP), when deformed with plastic plane‐strain compression, was studied with wide‐angle X‐ray scattering (WAXS) and differential scanning calorimetry (DSC) techniques. A comparison of the obtained crystallinity data with annealed iPP samples was performed. The material used in this study was commercial iPP (weight‐average molecular weight = 117.400 g/mol; number‐average molecular weight = 17.300 g/mol). A significant decrease in the crystallinity was observed with increasing deformation pressure when the X‐ray method was employed, whereas only a small decrease was registered when the DSC method of crystallinity determination was used. However, the annealed iPP samples demonstrated a slight crystallinity increase when evaluated by both techniques. The reason for the difference between WAXS and DSC crystallinity results is discussed. This study of iPP specimens subjected to large deformation led us to the conclusion that the WAXS method provides accurate crystallinity values for the deformed material, whereas the values obtained by the DSC method do not reproduce the real crystallinity of the deformed material. This is due to the inherent heating process of the method, which causes a relaxation process and a significant change in the crystallinity of the deformed material, providing values nearer to its intrinsic equilibrium state. © 2002 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 40: 896–903, 2002