The thesis is based on income question, forest coverage rate and grop production. to beging with, date envelopment analysis is proved that it can be applicated into grain for green in shan - bei district, and then in view of the fact, seven esential factors which have influence on the project are found out : expense of dam, expense of crop, expense of cash tree, expense of defense tree, other economic crop, expense of grass and graziery ; and the output factors include : income of gdp, pure income per captia, the area of decreasing land loss, graziery income, crop production, income of tree, the totle income of economic crop. after the date of each facts are puted into dea model, unefficiencial decision making units ( dmu ) found. the data that are got through adjusting unefficiencial dmus dy dea can offer guide in shanbei district upgrading of an industrial structure. at the same time, taking into account some possible problems in or after grain for green in shan - bei district, the thesis bring out some propesal to improve the circ umstance, enhance the life level and put the relation of population, resource and circumstance into a healthy orbit
因此，加快退耕還林還草，調整土地利用結構和產業結構，已成為實現山川秀美工程和可持續發展戰略的必經之路。論文以解決
陜北地區的收入問題，植被問題以及糧食產量問題為出發點，首先從理論上分析了包絡分析方法在
陜北地區退耕還林（草）中運用的可行性，然後結合
陜北地區目前的實際情況，綜合分析出影響
陜北地區退耕還林（草）的關鍵的七個因素作為輸入指標：水利水保設施投入，農作物投入，經濟林種支出，防護林支出，其它經濟作物，草類支出，畜牧業投入；以退耕還林所要解決的最終問題作為輸出指標： gdp收入、農民人均純收入、水土流失減少量、牧業總產值、糧食產量、林業總產值、其他經濟作物總產值。將各指標所對應的數據代入模型后，通過分析求解得出非有效的決策單元，再運用包絡分析方法的一些基本原理對非有效的決策單元進行調整，由此所得的數據對
陜北地區的實際投入具有很好的指導意義。
Research on rational use of hilly areas in northern shaanxi
陜北山地優化利用研究
The syntax of complex interrogative sentence in northern shaanxi dialect
陜北方言反復問句的句法形式
4. the prevention - cure measure for the landfall is put forward
4 .提出了
陜北宅基邊坡傷亡性黃土崩塌的防治措施。
The no. 210 national highway is one of the main frameworks of highway main stem meshwork in shanxi province, links the north of shanxi, guanzhong and the south of shanxi together
國道210是
陜西省「米」字型公路干線網的主骨架，縱貫
陜北、關中、
陜南，是我省最主要的干線之一。
Discussion on land production potentiality and land carrying capacity in agriculture and pasturage interlaced zone in loess plateau of northern shaanxi
陜北黃土高原農牧交錯帶土地生產潛力及人口承載力
Shelter structure and effect of farmland shelterbelt in sand - drift area in yulin
陜北榆林風沙區農田防護林結構配置與效益研究
This paper systematkally researched the characteristics of growth and physiology of sophora viciifolia hance ( a kind of natural shrub ) and its effects on the content of soil water, soil nutrieftt and soil physical property. the paper applied some methods and theory of plant ecology, plant physiology, physics of soil and soil chemistry etc. three different age s. viciifolia hance in the different plot were selected, caraganar land and fallow land as a comparison
本文以
陜北黃土區安塞紙坊溝流域內在植被演替中佔有重要地位的天然灌木種（ 6 、 14 、 17齡）狼牙刺（ sopharaviciifoliahance ）為對象，以15齡檸條（ caraganar ）和撂荒地為對照，系統研究了狼牙刺的生長特徵、生理特性，及其生長對土壤水分、土壤養分、土壤物理性狀的影響。
Applying the basic theories of spatial data mining and geomorphology, taking the loess plateau of north shaanxi province, china as the research area, this dissertation explored the theories and systematic structures of geomorphologic data mining and acknowledge discovery from dems, ascertained the systematic structures of topographic factors and synthetic topographic acknowledge, as well as systemically summarized mining algorithms from dems. the author pa id more attention also to analyze the principle and algorithm of flow length, curvature, relief, the earth ' s surface incision and gully density. in this research, the elementary constitutes and mining algorithms of regional character acknowledge in the loess plateau were probed
本研究在廣泛總結前人研究成果與研究經驗的基礎上，利用空間數據挖掘和地形地貌學的基本理論，以
陜北黃土高原多地貌類型區為實驗樣區，以1 10000比例尺dem為樣本數據，探討了dem中地形地貌數據挖掘與知識發現的理論方法和體系結構；確定了宏觀和微觀地形因子、地形綜合特徵知識的體系結構；系統總結了dem基本地形因子的提取演算法，並重點對坡長、曲率、地形的起伏度、切割深度和溝壑密度因子提取的原理與演算法作了深入的分析；提出了黃土高原地區區域特徵知識的基本構成及其系統完整、科學可行的挖掘提取演算法；擴充了arcviewgis軟體平臺中dem空間分析的基本功能；實現了以delphi7 . 0為平臺的地形信息輔助挖掘系統的設計與開發；完成了對黃土高原多地貌類型區（樣區）地形信息空間分異特徵的分析。
Hydrogeological feature as well as development and utilization of phreatic water in alluvial - lacustrine deposits of ding bian - jingbian plain, northern shanxi province
陜北定靖平原沖湖積層潛水水文地質特徵及開發利用
Based on field review and data collection, we study the land production potentiality and land carrying capacity in the zone. the main conclusions are as follows. 1 the research estimates the cropland production potentiality by step correct method
本項目在野外考察和資料收集的基礎上，對
陜北農牧交錯帶土地生產潛力及人口承載量進行了系統的分析研究，得到以下主要結論和成果： 1採用逐步訂正法估算作物生產潛力。
As for as language is concerned, he zhi - li mistakes dialects of the central shaanxi plain for those of north shaanxi which is revealed in his comment on the first volume of the ordinary world, one of lu yao ' s representative literary works
就方言來說，賀智利和路遙在這個方面都犯了錯誤，他們都把很多關中方言詞匯當作
陜北的獨特語言來處理，對《平凡的世界》第一卷的闡釋可以說明這個問題。
Based on the official history * various note collection works and many materials of locals records during ming and qing dynasty, the article analyses the agricultural economy development and the environmental change about the north of shaanxi
該文通過對明清之前
陜北地區農業經濟開發的回顧，利用明清時代的正史，同時廣泛搜羅大量的明清筆記文集以及方誌資料，對明清時期
陜北地區的農業經濟開發與環境變遷進行了論述和剖析。
Based on the serious shortage of soil moisture, soil aridity and vegetation recession in this region, the following issues are studied in this dissertation : ( 1 ) the meaning of soil water and its role in the water circulation ; ( 2 ) soil water deficit and its influence to vegetation growth ; ( 3 ) the definition of soil dried layer and the causes of its formation ; ( 4 ) soil dried layer distribution and characteristics in north of shaanxi loess plateau ; ( 5 ) the primary study of measurable index of soil dried layer
本論文主要針對黃土高原土壤水分嚴重虧缺現狀以及因之而形成的土壤干化和林草植被衰退現象，主要對以下幾方面的問題進行了研究： （ 1 ）土壤水分的意義及其在生態系統水分循環過程中的作用； （ 2 ）林草植被土壤水分虧缺狀況及其對植被生長的影響； （ 3 ）土壤干層的涵義及成因分析； （ 4 ）
陜北黃土高原土壤干層的分佈及特徵； （ 5 ）土壤干層的量化指標初步研究。
The effect of northern shaanxi dialect on putonghua proficiency test
陜北方言對普通話水平測試的影響
