In this thesis , based on item response theory , a number of ways to estimate the latent trait and item parameters were introduced and their advantages and disadvantages were analyzed ; what is more , empirical logistic regression and two parameters logistic model ( 2plm ) are combined to set up a linear model by logit - mapping and a new parameter - estimation method is proposed 新方法將經(jīng)驗(yàn)logistic回歸用于兩參數(shù)logistic模型的參數(shù)估計(jì),使用logit變換建立線性模型,利用線性模型的最小二乘估計(jì)得到第j個(gè)項(xiàng)目的項(xiàng)目參數(shù)向量_ j = ( _ j , _ j )的兩步估計(jì)由于x _ j含有未知的討厭參數(shù),的理論值也和有關(guān),我們結(jié)合上式的結(jié)果對進(jìn)行再估計(jì)。
Under the information background , the researching model , producing model and logistic model of motor & engine manufacturing having been changed enormously . in order to meet the demands of main engine manufacture enterprises , the application of information technique is getting more and more important in the manufacture enterprise administration 在全球信息化背景下,汽車制造企業(yè)的開發(fā)模式、生產(chǎn)方式、物流模式等方面發(fā)生了巨大的變化,為適應(yīng)主機(jī)企業(yè)的要求,信息技術(shù)的應(yīng)用在零部件制造企業(yè)管理中的地位日趨重要。
This paper discusses the close relations between e - commerce and logistics , it also analyzes the characteristics and technology requests of modern logistics . the paper mainly analyses the course and several problems of our domestic logistic development under the e - commence environment . a number of available logistic models and basic means in order to develop e - business logistics are proposed 本文論述了電子商務(wù)和物流的密切關(guān)系,闡述了現(xiàn)代電子商務(wù)物流的特點(diǎn)和技術(shù)要求,揭示了我國發(fā)展電子商務(wù)物流歷程及存在的若干問題,探討了電子商務(wù)環(huán)境下的物流發(fā)展模式及基本思路。
We surveyed the object " s parents conditions including their general state , exposed environmental factors , healthy conditions , drugs taking etc . the risk factors were evaluated by uni - and multi - unconditional logistic model used spss10 . 0 . we collected 66 patients and 55 healthy children in last 3 years 用統(tǒng)一調(diào)查表,對每個(gè)研究對象的親屬進(jìn)行面對面詢問,調(diào)查內(nèi)容包括患者一般情況,患者母親一般情況、生育史特別是生育年齡,孕期檢查情況、毒物接觸史、輻射接觸史、患病史、用藥史等;患者父親的一般情況、毒物接觸史、輻射接觸史、患病史、用藥史等。
In third part the author has adopted logistic model to analyze how the characteristic variables of rural inhabitants in city of fenghua influence land transfer . then based on the investigation of will , the way and scale of land transfer have been analyzed , and finally the influences that the behavior of land transfer made on land system have been studied 第三部分利用logistic模型分析奉化市農(nóng)村居民的各種特征變量對農(nóng)地流轉(zhuǎn)的影響,利用意向調(diào)查分析今后奉化市農(nóng)戶土地流轉(zhuǎn)的方式、規(guī)模,進(jìn)而研究奉化市農(nóng)戶家庭農(nóng)地流轉(zhuǎn)行為及其對農(nóng)地制度的影響。
The growth dynamics of tree basal area of form . taxus chinensis var . mairei population in different altitude were discussed using the liu - logistic model , and the results showed that the altutide of 790 meters is more suitable to the survive of form . toms chinensis var . mairei population than 990 meters . plot sampling was selected and dynamic analysis was used to study the height structure of taxus chinensis var . mairei population , and the quadrate picture of height structure and the curve of survival rate were drew 運(yùn)用改進(jìn)模型對南方紅豆杉種群在不同海拔梯度的種群優(yōu)勢度增長進(jìn)行了探討,表明海拔790m處的南方紅豆杉具有較大的環(huán)境容納量,但增長速度不快,海拔990m處的南方紅豆杉種群環(huán)境容納量不高,但具有較大的增長速度,這可能與群落的發(fā)育階段不同有關(guān),兩地海拔均為南方紅豆杉適宜的生長海拔高度,相比而言,海拔790m的珍稀瀕危植物南方紅豆杉種群數(shù)量特征的研究高度更宜于南方紅豆杉種群的生長。
The paper gives three finance distress discrimination models through applying for the fisher analysis , the principal component analysis and logistic regression analysis . it shows : comparatively , three discrimination models can all predict the finance distress correctly . among these models , the rate of false discrimination of the logistic model is the lowest 還以被st的前3年為時(shí)限,以9個(gè)財(cái)務(wù)指標(biāo)作為判別變量,在分析方法上應(yīng)用主成分分析、 fisher二類判別分析和logistic回歸分析分別建立了財(cái)務(wù)困境預(yù)測模型。
Taxus chinensis vsr . mairei population is very oblivious from seeding stage to mature tree stage . the patterns were consistant with the ecological and biological characteristics of form . taxus chinensis var . mairei which were valuable and rare and in severe danger . in this paper , logistic model and liu - logistic model were proposed to approach the growth dynamics of tree basal area of form . taxus chinensis var . mairei population 南方紅豆杉幼苗表現(xiàn)為較強(qiáng)的聚集分布,除與種子的散布有關(guān)外,生境條件的差異是重要原因之? ,其它發(fā)育階段表現(xiàn)為明顯的隨機(jī)分布,表明它在自然群落中分布的概率很小,反映了南方紅豆杉珍稀瀕危的生態(tài)生物學(xué)特性和特征。
This article based on the height of strategy , combine the mind of quick logistic and precise logistic , design the logistic model of small and medium - sized enterprise , with the view of system and guided by this model , this article analysis the component of enterprise ’ s logistic system , meanwhile , considered the characters of those component and the realistic of enterprise , reference certain method , optimized the enterprise ’ s logistic system . because there is phenomenon “ benefit is carried inside out ” exist in logistic system , so , when we optimizing the logistic system , we must consider the influence between both sides in benefit is carried inside out . treat wholly improved as standard , among them , the most important relation is stock and transportation 本文從企業(yè)的戰(zhàn)略發(fā)展的角度,結(jié)合敏捷物流和精益物流思想的優(yōu)點(diǎn),設(shè)計(jì)出了中小企業(yè)物流模型,并以此為指導(dǎo),以系統(tǒng)的觀點(diǎn)和整體優(yōu)化為宗旨,通過規(guī)劃中小企業(yè)物流系統(tǒng)的組成部分,結(jié)合企業(yè)自身的實(shí)際和各組成部分的特點(diǎn),對企業(yè)物流系統(tǒng)進(jìn)行了優(yōu)化設(shè)計(jì);由于企業(yè)物流系統(tǒng)中存在著效益背反的現(xiàn)象,因此,本文以占企業(yè)物流成本比重較大的庫存和運(yùn)輸兩大重要組成部分為重點(diǎn),在綜合考慮背反雙方的相互影響下,通過庫存計(jì)劃管理的優(yōu)化,設(shè)計(jì)出合適庫存水平和運(yùn)輸量的優(yōu)化模型,并采用逆向思維綜合設(shè)計(jì)了運(yùn)輸方式和運(yùn)輸路線模型;同時(shí)提出了企業(yè)要想切實(shí)地達(dá)到物流系統(tǒng)優(yōu)化預(yù)期目標(biāo)的三大對策。
With the angle of relationship between warning signs of accounting fraud and accounting fraud , the thesis analyzes the warning signs from three aspects as chinese listed companies practicing fraud , which are warning signs of accounting fraud of finance , management and drawback of corporate governance structure . on this foundation , it sets up logistic model of detecting accounting fraud , launches empirical study 論文以會計(jì)舞弊征兆與會計(jì)舞弊之間的關(guān)系為視角,從財(cái)務(wù)征兆、經(jīng)營征兆和公司治理結(jié)構(gòu)缺陷征兆三方面剖析了我國上市公司實(shí)施舞弊時(shí)可能存在的舞弊征兆,在此基礎(chǔ)上構(gòu)建了識別會計(jì)舞弊的邏輯斯特( logistic )回歸模型,展開實(shí)證研究。