肉鸡品种对产品出成和综合售价影响的研究

为探究不同肉鸡品种对产品出成和综合售价的影响,本研究以规模养殖场同条件下养殖的哈伯德、罗斯308和科宝肉鸡为研究对象,以单因素实验的方法,重点研究了三个肉鸡品种在相同屠宰分割条件下对各部位出成、主副产品出成以及总出成和综合售价的影响。结果显示,哈伯德品种肉鸡胸产品出成低19.37%,鸡架出成高17.82%,副产品出成偏高13.13%;罗斯308肉鸡各部位出成及主副产品出成均衡,且有最高的腿产品出成26.50%;科宝肉鸡出成与哈伯德相反,腿产品出成低24.26%,胸产品出成高23.47%,鸡架出成低16.75%,副产品出成偏低12.35%。同时,根据肉鸡品种对总出成和综合售价的影响分析来看,车间屠宰分割的最佳品种为罗斯308和科宝,两者具有较高的单位肉鸡产值10.47元/kg,而哈伯德的单位肉鸡产值仅为10.31元/kg,每年单一屠宰哈伯德品种肉鸡比罗斯308和科宝少创造营收1056万元左右。在试验数据的分析下,确定适宜车间屠宰的肉鸡品种为罗斯308和科宝,哈伯德肉鸡品种需进一步进行饲喂方式及饲料研究,改善肉鸡出油高、副产、骨架大以及大胸偏小的生长性状,以适应车间所需的屠宰性能指标。

不同毛鸡只重对产品出成和综合售价影响的研究

以规模养殖的罗斯308毛鸡为研究对象,探究不同毛鸡只重对产品出成和综合售价的影响。以单因素实验,重点研究了毛鸡只重对肉鸡各部位出成、主副产品出成以及总出成和综合售价的影响。结果显示:不同只重毛鸡与腿产品、胸产品及主产品出成呈正比关系,翅产品出成随只重的增加呈先增加后下降的走势,副产品出成与只重呈反比关系。同时,根据毛鸡只重对出成和售价的影响分析,车间屠宰分割的最佳只重为2. 55kg。在此只重下,有较高出成率88. 23%和最高综合售价10 840元/t。以此来确定肉鸡屠宰车间毛鸡的最佳只重范围,实现车间最大化价值生产。

散粒农业物料孔口出流成拱的离散单元仿真

简述了离散单元法的基本原理，离散单元法不仅能反映散粒相互间移动形态，而且能从动力学方面反应物料之间的力学关系。编制了仿真程序，对散粒农业物料孔口出流落粒成拱的影响因素进行了计算仿真。找出了粒结力、摩擦系数、粒径与临界孔口直径、拱高之间的关系，并把仿真结果和实验值对比分析。

散粒农业物料孔口出流成拱机理分析

本文对散粒农业物料孔口出流落粒拱形成的影响因素进行了分析讨论。根据微观力学原理,建立了颗粒成拱的力学模型;并计算了颗粒物料在孔口出流时形成落粒拱的临界条件。导出了粒径与临界孔口直径、拱高之间的关系。在试验的基础上,找出了物料粒径、含水率与临界孔口直径之间的变化规律。对农产品及食品加工机械的设计提供理论依据以及对今后进一步研究有一定意义。

镁合金射出模压成形技术

论述了镁合金的优良特性及其应用领域不断扩大的现状;介绍了国外开发的镁合金射出模压成形机及其成形工艺的特点,以及用该技术生产的产品实例。

郑樵的汉字生成理论

本文根据《六书略》等有关材料，对郑樵的汉字生成理论作了一次探索，分析了“书画同出”、“起一成文”、“子母相生”等学说的内涵，并探讨了其汉字生成理论的内在逻辑关系，认为他的汉字生成理论已形成一个自成体系的框架，具有独创性，但也存在粗疏、幼稚之弊。

Technological mineralogy and environmental activity of zinc leaching residue from zinc hydrometallurgical process

Chemical, physical, structural and morphological properties of zinc leaching residue were examined by the combination of various detection means such as AAS, XRF, XRD, M？ssbauer spectrometry, SEM-EDS, TG-DSC, XPS and FTIR. The toxicity characteristic leaching procedure （TCLP） was used to investigate the environmental activity of zinc leaching residue for a short contact time. The phase composition analysis indicated that the zinc leaching residue mainly consists of super refined flocculent particles including zinc ferrite, sulfate and silicate. The physical structural analysis showed that it has a thermal instability and strong water absorption properties. The results of TCLP indicated that the amounts of Zn and Cd in the leaching solution exceed 40 and 90 times of limit, respectively, which demonstrate that this residue is unstable in weak acidic environment for a short contact time.

Morphology and crystallography of β precipitate phase in Mg-Gd-Y-Nd-Zr alloy

Morphology and crystal structure of β precipitate phase in Mg-7Gd-5Y-1Nd-0.5Zr (mass fraction, %) alloy were characterized by optical microscopy, scanning electron microscopy and transmission electron microscopy. Compositions were determined for β phase using thin foil energy dispersive spectroscopy. Precipitation at 400 ℃ involves formation of platelet and block-shaped β phase. The orientation relationship is and between β precipitate phase and α-Mg matrix with habit planes parallel to , and a composition of Mg5(Y0.4Gd0.4Nd0.2) is suggested for the β phase in Mg-7Gd-5Y-1Nd-0.5Zr alloy.

钝顶螺旋藻营养生理的研究I：钝顶螺旋藻对无机碳的吸收利用

碳源对于进行光合作用的各种藻类是必不可少的。螺旋藻的生 态习性是在高pH环境下生长，因此螺旋藻碳代谢的研究有特殊的意义。文中报道了螺旋藻对 无机碳的吸收利用以及与其生长的关系，结果表明螺旋藻培养基中碳酸氢钠的浓度50～100mm ol/dm3时，不仅可以满足螺旋藻生长的需要，而且有助于保持藻体生长的pH值。结果还表 明适当添加碳酸氢氨有利于螺旋藻的生长。

Uplink capacity analysis of single-user SA-MIMO system

A novel framework of which combines smart antennas multiple antenna systems, （SA） with multiple-input multiple-output （MIMO） at the receiver, is proposed. The uplink SA-MIMO system is investigated. The joint optimization problem corresponding to the uplink capacity of the single-user SA-MIMO system is deduced. Then the closedform expression of the capacity is obtained in the case of equal power allocation and the same direction-of-arrivals （DOAs） from different transmit antennas at the same antenna array, and an upper bound of the capacity is also given in the case of different DOAs at the same antenna array. After that, for the general case, a suboptimal method for the capacity optimization problem is presented. Some numerical results are also given to compare the capacities of conventional MIMO and SA-MIMO systems and show that the proposed method is viable.

Design and implementation of GM- APD array readout circuit for infrared imaging

Based on an avalanche photodiode（ APD） detecting array working in Geiger mode（ GM-APD）, a high-performance infrared sensor readout integrated circuit（ ROIC） used for infrared 3D（ three-dimensional） imaging is proposed. The system mainly consists of three functional modules, including active quenching circuit（ AQC）, time-to-digital converter（ TDC） circuit and other timing controller circuit. Each AQC and TDC circuit together constitutes the pixel circuit. Under the cooperation with other modules, the current signal generated by the GM-APD sensor is detected by the AQC, and the photon time-of-flight（ TOF） is measured and converted to a digital signal output to achieve a better noise suppression and a higher detection sensitivity by the TDC. The ROIC circuit is fabricated by the CSMC 0. 5 μm standard CMOS technology. The array size is 8 × 8, and the center distance of two adjacent cells is 100μm. The measurement results of the chip showthat the performance of the circuit is good, and the chip can achieve 1 ns time resolution with a 250 MHz reference clock, and the circuit can be used in the array structure of the infrared detection system or focal plane array（ FPA）.

NOISE EFFECT ON CHARACTERISTICS OF FLIP FLOP SENSOR

This paper presents a new class of semiconductor integrated sensor which consists of sensitive components and flip flop circuit. The sensors have high sensitivity and digital output. This paper describes the operating principle and structure of the sensor. And noise effect on characteristics of the sensor is analysed in detail. The modulated effect of the triangular wave voltage is quantified. As an example, an integrated pressure sensor is introduced and the experimental results agree with the theoretical analyses.

Diagnosis and treatment of small intestinal bleeding:Retrospective analysis of 76 cases

AIM: To investigate the causes of small intestinal bleed- ing as well as its diagnosis and therapeutic approaches. METHODS: A retrospective analysis was conducted ac- cording to the clinical records of 76 patients with small intestinal bleeding admitted to our hospital in the past 5 years. RESULTS: In these patients, tumor was the most fre- quent cause of small intestinal bleeding (37/76), fol- lowed by Meckel’s diverticulum (21/76), angiopathy (15/76) and ectopic pancreas (3/76). Of the 76 patients, 21 were diagnosed by digital subtraction angiography, 13 by barium and air double contrast X-ray examination of the small intestine, 11 by 99mTc-sestamibi scintigraphy of the abdominal cavity, 6 by enteroscopy of the small intestine, 21 by laparoscopic laparotomy, and 4 by ex- ploratory laparotomy. Although all the patients received surgical treatment, most of them (68/76) received part enterectomy covering the diseased segment and entero- anastomosis. The follow-up time ranged from 1 year to 5 years. No case had recurrent alimentary tract bleeding or other complications. CONCLUSION: Tumor is the major cause of small in- testinal bleeding followed by Meckel’s diverticulum and angiopathy. The main approaches to definite diagnosis of small intestinal bleeding include digital subtraction an- giography, 99mTc-sestamibi scintigraphy of the abdominal cavity, barium and air double contrast X-ray examina- tion of the small intestine, laparoscopic laparotomy or exploratory laparotomy. Part enterectomy covering the diseased segment and enteroanastomosis are the most effective treatment modalities for small intestinal bleed- ing.

A New Type Machine of Mixing-molding for Polyblends

This paper introduces a new type machine for polyblends with excellent mixing capabilities of internal mixer and continuous molding character of extruder.The machine includes two functions - mixing and extrusion molding that have been composed together by rational design,so a tandem production mode - "batch + continuous" are opened up.The mathematical model of continuous mixing molding was established and verified availably by experimental research.The main physical mechanical property of vulcanizate,which had met national waterproof material standard,verified the machine practicability.The essential difference from other similar type machines is that this machine is not only suitable in producing granular and powder rubbers but also lumpish rubbers.

Antithrombotic Effects of BM-13505,a ThromboxaneReceptor Antagonist

BM-13 505 is a new type of thromboxane receptor antagonist developed firstabfoad and synthesized in our school.wita modife method recently。The resultS of our study showed that the occlusion time of carotid artery in experimental thrombosis rats was prolonged by BM-13505,0.45 and 0.23 mglkg iv fP<0.00 1 and <0.01 respectively).B·13505 2 mgjkg iv ef fectively prevented the cerebral thrombosis caused by AA 4 mg/kg in rats(P<0.01) BM-13505 10 mg/kg ip prevented the AA-induced pulmonary thrombosis in mice(P<0.01).Tail bleeding time of mice was prolonged by this dru.BM-13505 significantly inhibited the AA-induced rabbit platelet aggregation,with an IC￣(50) of0.17 μmol/L; ADp-and collagen-induced aggregations were not affected.TXB_2 level in platelets and that in mice plasma were decreased by BM-13505,but cAMP level inplatelets was not affected. BM-13505 may be possibly developed into a useful anti-platelet and anti-thromboti c drug。

Application of superb microvascular imaging in focal liver lesions

AIM To explore the ability of superb microvascular imaging(SMI) in differential diagnosis of focal liver lesions(FLLs) and to compare SMI morphology findings to those of color Doppler ultrasound and enhanced imaging.METHODS Twenty-four patients with 31 FLLs were included in our study,with diagnoses of hemangioma(HE)(n = 17),hepatocellular carcinoma(HCC)(n = 5),metastatic lesions(n = 5),primary hepatic lymphoma(n = 1),focal nodular hyperplasia(FNH)(n = 2),and adenoma(n = 1). Nine lesions were pathologically diagnosed,and 22 lesions were radiologically confirmed,all of which were evaluated by at least two types of enhanced imaging techniques. All patients had undergone SMI. Patients were divided into subgroups based on pathological and radiological diagnoses to analyze SMI manifestations. We also compared the SMI manifestations of the most common malignant FLLs(HCCs and metastatic lesions) with those of the most common benign FLLs(HEs).RESULTS HEs were classified into three SMI subgroups: diffuse dot-like type(n = 6),strip rim type(n = 8),and nodular rim type(n = 3). The sizes of the three types of HEs were significantly different(P = 0.00,< 0.05). HCCs were classified into two subgroups: diffuse honeycomb type(n = 2) and non-specific type(n = 3). Four of the metastatic lesions were the strip rim type,and the other metastatic lesion was the thick rim type,which is the same as that of lymphoma. FNH was described as a spoke-wheel type,and adenoma as a diffuse honeycomb type. The SMI types of HCCs and metastatic lesions were significantly different from those of HEs(P = 0.048,< 0.05).CONCLUSION SMI technology enables microvascular evaluation of FLLs without using any contrast agent. For HEs,lesion size may affect SMI performance. SMI is able to provide useful information for differential diagnosis of HCCs and metastatic lesions from HEs.

△P index with different gas compositions for instantaneous outburst prediction in coal mines

In this study we measured the △P(initial speed of gas emission) index with different gas concentrations of carbon dioxide(pure CO2,90% CO2+10% CH4,67% CO2+33% CH4,50% CO2+50% CH4,30% CO2+10% CH4 and pure CH4) of coal samples from the No.2 coal seam in the Yaojie Coal Mine,Gansu province,China.The effect of carbon dioxide concentration,gas composition,coal strength and particle size of coal samples on the △P index was investigated.The experimental results show that with gas of various compositions,the △P value of three samples were clearly different.The △P index of coal samples A,B and C(0.2～0.25 mm) were 4,6 and 7 with pure CH4 and 22,30 and 21 when pure CH4 was used.Carbon dioxide concentration affects the △P index markedly.The △P index increases with an increase in carbon dioxide concentration,especially for coal B.Hence,the △P index and K(another outburst index) values tested only with pure CH4 for prediction of the danger of outburst is not accurate.It is important to determine the initial speed of gas emission given the gas composition of the coal seam to be tested for exact outburst prediction.

Cost control based on value chain paying equal attention to earning more income and cutting down expense

According to the idea of cost control based on the value chain, several important factors are necessary. Firstly, it is necessary to have enough resources, which must be invested to create advantageous value chain based on customer value. It is also necessary to be sure of the cost advantage of the value chain. Secondly, the consumption of resources must be reduced as much as possible to enable the smallest operating cost for the value chain and make sure of the cost advantage based on maximum business value or profit. It is a kind of cost control from the whole view of creation and supply of value. In practice, it is also a kind of cost control system based on the value chain. It includes enough control and necessary resource investment from the view of the value creation, and keeps consumption of resources to a reasonable level from the view of the value supply. The main object of the first factor is to construct the advantageous value chain from creating customer value; and the second factor is to strengthen the advantageous value chain from supplying or producing customer value. Therefore it is a new kind of idea to explore this cost control from the whole view of creation and supply of value. It is more profitable for businesses to gain sustainable competitive advantage.

Modeling and Control of Nonlinear Discrete-time Systems Based on Compound Neural Networks

An adaptive inverse controller for nonliear discrete-time system is proposed in this paper. A compound neural network is constructed to identify the nonlinear system, which includes a linear part to approximate the nonlinear system and a recurrent neural network to minimize the difference between the linear model and the real nonlinear system. Because the current control input is not included in the input vector of recurrent neural network (RNN), the inverse control law can be calculated directly. This scheme can be used in real-time nonlinear single-input single-output (SISO) and multi-input multi-output (MIMO) system control with less computation work. Simulation studies have shown that this scheme is simple and affects good control accuracy and robustness.

On the Secrecy Rate of Limited Feedback Beamforming over Multiple-Input Single-Output Wiretap Channels

The secrecy rate of limited feedback beamforming is studied for a Multiple-Input Single-Output(MISO) wiretap channel with a multi-antenna eavesdropper.We first obtain the secrecy rate of limited feedback beamforming achieved at the legitimate receiver.We then derive a lower bound for the asymptotic secrecy rate in the large system limit.From this bound,we observe a threshold for the ratio of eavesdrop antennas to transmit antennas to obtain a positive secrecy rate.We further show that the secrecy rate loss due to limited feedback decays with the number of feedback bits per transmit antenna.