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But high grade wheat must undertake according to climate and edaphic condition area is changed cultivate, dimensions turns production, have special demand to the administrative condition such as fat water.

但是优质麦必须按照气候和土壤条件进行区域化种植、规模化生产，并对肥水等治理条件有非凡要求。

Subsequently,enol methylation of P in basic condition completed the synthesis of malyngamide O.Applied this route to the synthesis of malyngamides Q and R,the chiral unsaturated acid was connected with the vinyl chloride part by amidation,then the resulting product was converted into the corresponding aldehyde,followed by aldol condensation of the aldehyde with the chlorotitanium enolate of pyrrolidone to complete the skeleton of malyngamides Q and R,then the synthesis of them was completed via enol methylation in acid condition.

该合成路线拓展应用到malyngamides Q和R的合成时，首先用酰胺键将手性不饱和脂肪酸和烯氯片段连接，再转化成相应的醛，与乙酰基吡咯酮进行TiCl_4催化的aldol反应即得到malyngamides Q和R的骨架结构，再经过酸催化的烯醇甲基化反应完成了Q和R的全合成。

The effect of microbial action was larger than that of enzymic action under aerobic condition, but was smaller under anacrobic condition.

烤烟发酵过程中，引起烟叶品质改善的主要因素为氧化作用、微生物作用和酶作用，其中以氧化作用为关键性主导作用。

This paper found the structure of hydraulic excavators condition monitoring and failure diagnosis system at first.That is a system composed of hypogynous SCM realizing on-line condition monitoring and epigynous PC realizing off-line failure diagnosis.Then the function and testing principle of hypogynous system is analyzed.The design of system hardware circuit and software formality are introduced.

本文首先构建了液压挖掘机状态监测与故障诊断系统结构，即由实现在线状态监测功能的下位单片机和实现离线故障诊断功能的上位PC机组成的系统；然后确定了下位机系统的功能，分析了测试原理，设计了硬件电路和软件程序。

The results of the investigation showed that the best entrance angle of B〓C, B〓C/ C and Al〓O〓/ C ceramic nozzles is 11°, 14°and 16°respectively. Erosion wear model has been put forward. The B〓C and B〓C/ C nozzles exhibited a stress fatigue induced removal process under the condition of umber emery erodent impacting, and a brittle fracture induced removal process under the condition of white emery and SiC erodent impacting.

建立了不同磨损机理下的冲蚀磨损模型，提出了喷砂嘴的磨损属于多冲蚀机理并存的复合冲蚀机制。B〓C和B〓C/C陶瓷喷砂嘴在棕刚玉磨料的冲蚀下，主要表现为应力疲劳断裂冲蚀，在白刚玉和SiC磨料的冲蚀下，主要表现为脆性断裂冲蚀。

The optimum reaction condition was as follows: catalyst dosage=4.3% of the amount of ethanediol,reaction time 50 min.1,4-dioxane yield of 84.82% was obtained under the optimum condition.

考察了催化剂用量、反应时间和反应温度等因素对收率的影响，得出最佳反应条件：催化剂用量为乙二醇质量的4.3%，反应时间50 min，收率可达84.82%。

And then, the second-order reaction rate constant was K =0.025 L/. The removal of ethanethiol in raw water by potassium permanganate under coagulation condition was poorer than in pure water condition, So predicted concentration of potassium permanganate was lower than real concentration.

高锰酸钾在原水混凝条件下对乙硫醇的去除效果劣于纯水条件下的去除效果，在水中其它有机物与高锰酸钾反应条件下高锰酸钾浓度变化的拟合结果与实际情况存在偏差，是产生差异的主要原因。

In operation condition same condition issues groovy floatation column to cannot achieve so good result.

在操作条件相同条件下常规浮选柱不能获得这样好的结果。

When a "short-day"condition of 8 hours was provided,sweet potato plants flowered about 10-25 days earlier than that under natural condition in Foochow.

当给以8小时短日条件，甘薯植株比在福州自然条件下的提早开花10——25天。

The paper studies fault diagnosis technology based on fruticose gas pipe network which is universal in small towns,and gives a particular description of domestic and foreign gas pipe network fault diagnosis technique based on hardware and software currently. The author uses graph theory to build up hydraulic analysis model of natural gas network and presents its solution methods. Besides, the author works out the relation between gas pipe pressure and flux in unsteady condition of fluid flow according to pressure boundary condition and differential equation group, and puts forward fault diagnosis methods and steps of the fruticose natural gas pipe network of middle pressure based on the simplification of this relation.

本文针对小城镇比较普遍的枝状天然气分配管网进行故障诊断技术研究，详细叙述了目前国内外基于硬件和软件的燃气管网故障诊断技术，利用图论理论建立了天然气管网水力分析模型并叙述了其求解方法，根据燃气管内流动的微分方程组和压力边界条件求解出非稳定流动时燃气管道压力和流量的关系，并在对此关系进行简化的基础上提出了基于中压枝状天然气管网的故障诊断方法和步骤。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。